Integrate Vector Permutation AES into build system.
[openssl.git] / crypto / aes / asm / aes-586.pl
1 #!/usr/bin/env perl
2 #
3 # ====================================================================
4 # Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
5 # project. The module is, however, dual licensed under OpenSSL and
6 # CRYPTOGAMS licenses depending on where you obtain it. For further
7 # details see http://www.openssl.org/~appro/cryptogams/.
8 # ====================================================================
9 #
10 # Version 4.3.
11 #
12 # You might fail to appreciate this module performance from the first
13 # try. If compared to "vanilla" linux-ia32-icc target, i.e. considered
14 # to be *the* best Intel C compiler without -KPIC, performance appears
15 # to be virtually identical... But try to re-configure with shared
16 # library support... Aha! Intel compiler "suddenly" lags behind by 30%
17 # [on P4, more on others]:-) And if compared to position-independent
18 # code generated by GNU C, this code performs *more* than *twice* as
19 # fast! Yes, all this buzz about PIC means that unlike other hand-
20 # coded implementations, this one was explicitly designed to be safe
21 # to use even in shared library context... This also means that this
22 # code isn't necessarily absolutely fastest "ever," because in order
23 # to achieve position independence an extra register has to be
24 # off-loaded to stack, which affects the benchmark result.
25 #
26 # Special note about instruction choice. Do you recall RC4_INT code
27 # performing poorly on P4? It might be the time to figure out why.
28 # RC4_INT code implies effective address calculations in base+offset*4
29 # form. Trouble is that it seems that offset scaling turned to be
30 # critical path... At least eliminating scaling resulted in 2.8x RC4
31 # performance improvement [as you might recall]. As AES code is hungry
32 # for scaling too, I [try to] avoid the latter by favoring off-by-2
33 # shifts and masking the result with 0xFF<<2 instead of "boring" 0xFF.
34 #
35 # As was shown by Dean Gaudet <dean@arctic.org>, the above note turned
36 # void. Performance improvement with off-by-2 shifts was observed on
37 # intermediate implementation, which was spilling yet another register
38 # to stack... Final offset*4 code below runs just a tad faster on P4,
39 # but exhibits up to 10% improvement on other cores.
40 #
41 # Second version is "monolithic" replacement for aes_core.c, which in
42 # addition to AES_[de|en]crypt implements AES_set_[de|en]cryption_key.
43 # This made it possible to implement little-endian variant of the
44 # algorithm without modifying the base C code. Motivating factor for
45 # the undertaken effort was that it appeared that in tight IA-32
46 # register window little-endian flavor could achieve slightly higher
47 # Instruction Level Parallelism, and it indeed resulted in up to 15%
48 # better performance on most recent µ-archs...
49 #
50 # Third version adds AES_cbc_encrypt implementation, which resulted in
51 # up to 40% performance imrovement of CBC benchmark results. 40% was
52 # observed on P4 core, where "overall" imrovement coefficient, i.e. if
53 # compared to PIC generated by GCC and in CBC mode, was observed to be
54 # as large as 4x:-) CBC performance is virtually identical to ECB now
55 # and on some platforms even better, e.g. 17.6 "small" cycles/byte on
56 # Opteron, because certain function prologues and epilogues are
57 # effectively taken out of the loop...
58 #
59 # Version 3.2 implements compressed tables and prefetch of these tables
60 # in CBC[!] mode. Former means that 3/4 of table references are now
61 # misaligned, which unfortunately has negative impact on elder IA-32
62 # implementations, Pentium suffered 30% penalty, PIII - 10%.
63 #
64 # Version 3.3 avoids L1 cache aliasing between stack frame and
65 # S-boxes, and 3.4 - L1 cache aliasing even between key schedule. The
66 # latter is achieved by copying the key schedule to controlled place in
67 # stack. This unfortunately has rather strong impact on small block CBC
68 # performance, ~2x deterioration on 16-byte block if compared to 3.3.
69 #
70 # Version 3.5 checks if there is L1 cache aliasing between user-supplied
71 # key schedule and S-boxes and abstains from copying the former if
72 # there is no. This allows end-user to consciously retain small block
73 # performance by aligning key schedule in specific manner.
74 #
75 # Version 3.6 compresses Td4 to 256 bytes and prefetches it in ECB.
76 #
77 # Current ECB performance numbers for 128-bit key in CPU cycles per
78 # processed byte [measure commonly used by AES benchmarkers] are:
79 #
80 #               small footprint         fully unrolled
81 # P4            24                      22
82 # AMD K8        20                      19
83 # PIII          25                      23
84 # Pentium       81                      78
85 #
86 # Version 3.7 reimplements outer rounds as "compact." Meaning that
87 # first and last rounds reference compact 256 bytes S-box. This means
88 # that first round consumes a lot more CPU cycles and that encrypt
89 # and decrypt performance becomes asymmetric. Encrypt performance
90 # drops by 10-12%, while decrypt - by 20-25%:-( 256 bytes S-box is
91 # aggressively pre-fetched.
92 #
93 # Version 4.0 effectively rolls back to 3.6 and instead implements
94 # additional set of functions, _[x86|sse]_AES_[en|de]crypt_compact,
95 # which use exclusively 256 byte S-box. These functions are to be
96 # called in modes not concealing plain text, such as ECB, or when
97 # we're asked to process smaller amount of data [or unconditionally
98 # on hyper-threading CPU]. Currently it's called unconditionally from
99 # AES_[en|de]crypt, which affects all modes, but CBC. CBC routine
100 # still needs to be modified to switch between slower and faster
101 # mode when appropriate... But in either case benchmark landscape
102 # changes dramatically and below numbers are CPU cycles per processed
103 # byte for 128-bit key.
104 #
105 #               ECB encrypt     ECB decrypt     CBC large chunk
106 # P4            56[60]          84[100]         23
107 # AMD K8        48[44]          70[79]          18
108 # PIII          41[50]          61[91]          24
109 # Core 2        32[38]          45[70]          18.5
110 # Pentium       120             160             77
111 #
112 # Version 4.1 switches to compact S-box even in key schedule setup.
113 #
114 # Version 4.2 prefetches compact S-box in every SSE round or in other
115 # words every cache-line is *guaranteed* to be accessed within ~50
116 # cycles window. Why just SSE? Because it's needed on hyper-threading
117 # CPU! Which is also why it's prefetched with 64 byte stride. Best
118 # part is that it has no negative effect on performance:-)  
119 #
120 # Version 4.3 implements switch between compact and non-compact block
121 # functions in AES_cbc_encrypt depending on how much data was asked
122 # to be processed in one stroke.
123 #
124 ######################################################################
125 # Timing attacks are classified in two classes: synchronous when
126 # attacker consciously initiates cryptographic operation and collects
127 # timing data of various character afterwards, and asynchronous when
128 # malicious code is executed on same CPU simultaneously with AES,
129 # instruments itself and performs statistical analysis of this data.
130 #
131 # As far as synchronous attacks go the root to the AES timing
132 # vulnerability is twofold. Firstly, of 256 S-box elements at most 160
133 # are referred to in single 128-bit block operation. Well, in C
134 # implementation with 4 distinct tables it's actually as little as 40
135 # references per 256 elements table, but anyway... Secondly, even
136 # though S-box elements are clustered into smaller amount of cache-
137 # lines, smaller than 160 and even 40, it turned out that for certain
138 # plain-text pattern[s] or simply put chosen plain-text and given key
139 # few cache-lines remain unaccessed during block operation. Now, if
140 # attacker can figure out this access pattern, he can deduct the key
141 # [or at least part of it]. The natural way to mitigate this kind of
142 # attacks is to minimize the amount of cache-lines in S-box and/or
143 # prefetch them to ensure that every one is accessed for more uniform
144 # timing. But note that *if* plain-text was concealed in such way that
145 # input to block function is distributed *uniformly*, then attack
146 # wouldn't apply. Now note that some encryption modes, most notably
147 # CBC, do mask the plain-text in this exact way [secure cipher output
148 # is distributed uniformly]. Yes, one still might find input that
149 # would reveal the information about given key, but if amount of
150 # candidate inputs to be tried is larger than amount of possible key
151 # combinations then attack becomes infeasible. This is why revised
152 # AES_cbc_encrypt "dares" to switch to larger S-box when larger chunk
153 # of data is to be processed in one stroke. The current size limit of
154 # 512 bytes is chosen to provide same [diminishigly low] probability
155 # for cache-line to remain untouched in large chunk operation with
156 # large S-box as for single block operation with compact S-box and
157 # surely needs more careful consideration...
158 #
159 # As for asynchronous attacks. There are two flavours: attacker code
160 # being interleaved with AES on hyper-threading CPU at *instruction*
161 # level, and two processes time sharing single core. As for latter.
162 # Two vectors. 1. Given that attacker process has higher priority,
163 # yield execution to process performing AES just before timer fires
164 # off the scheduler, immediately regain control of CPU and analyze the
165 # cache state. For this attack to be efficient attacker would have to
166 # effectively slow down the operation by several *orders* of magnitute,
167 # by ratio of time slice to duration of handful of AES rounds, which
168 # unlikely to remain unnoticed. Not to mention that this also means
169 # that he would spend correspondigly more time to collect enough
170 # statistical data to mount the attack. It's probably appropriate to
171 # say that if adeversary reckons that this attack is beneficial and
172 # risks to be noticed, you probably have larger problems having him
173 # mere opportunity. In other words suggested code design expects you
174 # to preclude/mitigate this attack by overall system security design.
175 # 2. Attacker manages to make his code interrupt driven. In order for
176 # this kind of attack to be feasible, interrupt rate has to be high
177 # enough, again comparable to duration of handful of AES rounds. But
178 # is there interrupt source of such rate? Hardly, not even 1Gbps NIC
179 # generates interrupts at such raging rate...
180 #
181 # And now back to the former, hyper-threading CPU or more specifically
182 # Intel P4. Recall that asynchronous attack implies that malicious
183 # code instruments itself. And naturally instrumentation granularity
184 # has be noticeably lower than duration of codepath accessing S-box.
185 # Given that all cache-lines are accessed during that time that is.
186 # Current implementation accesses *all* cache-lines within ~50 cycles
187 # window, which is actually *less* than RDTSC latency on Intel P4!
188
189 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
190 push(@INC,"${dir}","${dir}../../perlasm");
191 require "x86asm.pl";
192
193 &asm_init($ARGV[0],"aes-586.pl",$x86only = $ARGV[$#ARGV] eq "386");
194 &static_label("AES_Te");
195 &static_label("AES_Td");
196
197 $s0="eax";
198 $s1="ebx";
199 $s2="ecx";
200 $s3="edx";
201 $key="edi";
202 $acc="esi";
203 $tbl="ebp";
204
205 # stack frame layout in _[x86|sse]_AES_* routines, frame is allocated
206 # by caller
207 $__ra=&DWP(0,"esp");    # return address
208 $__s0=&DWP(4,"esp");    # s0 backing store
209 $__s1=&DWP(8,"esp");    # s1 backing store
210 $__s2=&DWP(12,"esp");   # s2 backing store
211 $__s3=&DWP(16,"esp");   # s3 backing store
212 $__key=&DWP(20,"esp");  # pointer to key schedule
213 $__end=&DWP(24,"esp");  # pointer to end of key schedule
214 $__tbl=&DWP(28,"esp");  # %ebp backing store
215
216 # stack frame layout in AES_[en|crypt] routines, which differs from
217 # above by 4 and overlaps by %ebp backing store
218 $_tbl=&DWP(24,"esp");
219 $_esp=&DWP(28,"esp");
220
221 sub _data_word() { my $i; while(defined($i=shift)) { &data_word($i,$i); } }
222
223 $speed_limit=512;       # chunks smaller than $speed_limit are
224                         # processed with compact routine in CBC mode
225 $small_footprint=1;     # $small_footprint=1 code is ~5% slower [on
226                         # recent µ-archs], but ~5 times smaller!
227                         # I favor compact code to minimize cache
228                         # contention and in hope to "collect" 5% back
229                         # in real-life applications...
230
231 $vertical_spin=0;       # shift "verticaly" defaults to 0, because of
232                         # its proof-of-concept status...
233 # Note that there is no decvert(), as well as last encryption round is
234 # performed with "horizontal" shifts. This is because this "vertical"
235 # implementation [one which groups shifts on a given $s[i] to form a
236 # "column," unlike "horizontal" one, which groups shifts on different
237 # $s[i] to form a "row"] is work in progress. It was observed to run
238 # few percents faster on Intel cores, but not AMD. On AMD K8 core it's
239 # whole 12% slower:-( So we face a trade-off... Shall it be resolved
240 # some day? Till then the code is considered experimental and by
241 # default remains dormant...
242
243 sub encvert()
244 { my ($te,@s) = @_;
245   my $v0 = $acc, $v1 = $key;
246
247         &mov    ($v0,$s[3]);                            # copy s3
248         &mov    (&DWP(4,"esp"),$s[2]);                  # save s2
249         &mov    ($v1,$s[0]);                            # copy s0
250         &mov    (&DWP(8,"esp"),$s[1]);                  # save s1
251
252         &movz   ($s[2],&HB($s[0]));
253         &and    ($s[0],0xFF);
254         &mov    ($s[0],&DWP(0,$te,$s[0],8));            # s0>>0
255         &shr    ($v1,16);
256         &mov    ($s[3],&DWP(3,$te,$s[2],8));            # s0>>8
257         &movz   ($s[1],&HB($v1));
258         &and    ($v1,0xFF);
259         &mov    ($s[2],&DWP(2,$te,$v1,8));              # s0>>16
260          &mov   ($v1,$v0);
261         &mov    ($s[1],&DWP(1,$te,$s[1],8));            # s0>>24
262
263         &and    ($v0,0xFF);
264         &xor    ($s[3],&DWP(0,$te,$v0,8));              # s3>>0
265         &movz   ($v0,&HB($v1));
266         &shr    ($v1,16);
267         &xor    ($s[2],&DWP(3,$te,$v0,8));              # s3>>8
268         &movz   ($v0,&HB($v1));
269         &and    ($v1,0xFF);
270         &xor    ($s[1],&DWP(2,$te,$v1,8));              # s3>>16
271          &mov   ($v1,&DWP(4,"esp"));                    # restore s2
272         &xor    ($s[0],&DWP(1,$te,$v0,8));              # s3>>24
273
274         &mov    ($v0,$v1);
275         &and    ($v1,0xFF);
276         &xor    ($s[2],&DWP(0,$te,$v1,8));              # s2>>0
277         &movz   ($v1,&HB($v0));
278         &shr    ($v0,16);
279         &xor    ($s[1],&DWP(3,$te,$v1,8));              # s2>>8
280         &movz   ($v1,&HB($v0));
281         &and    ($v0,0xFF);
282         &xor    ($s[0],&DWP(2,$te,$v0,8));              # s2>>16
283          &mov   ($v0,&DWP(8,"esp"));                    # restore s1
284         &xor    ($s[3],&DWP(1,$te,$v1,8));              # s2>>24
285
286         &mov    ($v1,$v0);
287         &and    ($v0,0xFF);
288         &xor    ($s[1],&DWP(0,$te,$v0,8));              # s1>>0
289         &movz   ($v0,&HB($v1));
290         &shr    ($v1,16);
291         &xor    ($s[0],&DWP(3,$te,$v0,8));              # s1>>8
292         &movz   ($v0,&HB($v1));
293         &and    ($v1,0xFF);
294         &xor    ($s[3],&DWP(2,$te,$v1,8));              # s1>>16
295          &mov   ($key,$__key);                          # reincarnate v1 as key
296         &xor    ($s[2],&DWP(1,$te,$v0,8));              # s1>>24
297 }
298
299 # Another experimental routine, which features "horizontal spin," but
300 # eliminates one reference to stack. Strangely enough runs slower...
301 sub enchoriz()
302 { my $v0 = $key, $v1 = $acc;
303
304         &movz   ($v0,&LB($s0));                 #  3, 2, 1, 0*
305         &rotr   ($s2,8);                        #  8,11,10, 9
306         &mov    ($v1,&DWP(0,$te,$v0,8));        #  0
307         &movz   ($v0,&HB($s1));                 #  7, 6, 5*, 4
308         &rotr   ($s3,16);                       # 13,12,15,14
309         &xor    ($v1,&DWP(3,$te,$v0,8));        #  5
310         &movz   ($v0,&HB($s2));                 #  8,11,10*, 9
311         &rotr   ($s0,16);                       #  1, 0, 3, 2
312         &xor    ($v1,&DWP(2,$te,$v0,8));        # 10
313         &movz   ($v0,&HB($s3));                 # 13,12,15*,14
314         &xor    ($v1,&DWP(1,$te,$v0,8));        # 15, t[0] collected
315         &mov    ($__s0,$v1);                    # t[0] saved
316
317         &movz   ($v0,&LB($s1));                 #  7, 6, 5, 4*
318         &shr    ($s1,16);                       #  -, -, 7, 6
319         &mov    ($v1,&DWP(0,$te,$v0,8));        #  4
320         &movz   ($v0,&LB($s3));                 # 13,12,15,14*
321         &xor    ($v1,&DWP(2,$te,$v0,8));        # 14
322         &movz   ($v0,&HB($s0));                 #  1, 0, 3*, 2
323         &and    ($s3,0xffff0000);               # 13,12, -, -
324         &xor    ($v1,&DWP(1,$te,$v0,8));        #  3
325         &movz   ($v0,&LB($s2));                 #  8,11,10, 9*
326         &or     ($s3,$s1);                      # 13,12, 7, 6
327         &xor    ($v1,&DWP(3,$te,$v0,8));        #  9, t[1] collected
328         &mov    ($s1,$v1);                      #  s[1]=t[1]
329
330         &movz   ($v0,&LB($s0));                 #  1, 0, 3, 2*
331         &shr    ($s2,16);                       #  -, -, 8,11
332         &mov    ($v1,&DWP(2,$te,$v0,8));        #  2
333         &movz   ($v0,&HB($s3));                 # 13,12, 7*, 6
334         &xor    ($v1,&DWP(1,$te,$v0,8));        #  7
335         &movz   ($v0,&HB($s2));                 #  -, -, 8*,11
336         &xor    ($v1,&DWP(0,$te,$v0,8));        #  8
337         &mov    ($v0,$s3);
338         &shr    ($v0,24);                       # 13
339         &xor    ($v1,&DWP(3,$te,$v0,8));        # 13, t[2] collected
340
341         &movz   ($v0,&LB($s2));                 #  -, -, 8,11*
342         &shr    ($s0,24);                       #  1*
343         &mov    ($s2,&DWP(1,$te,$v0,8));        # 11
344         &xor    ($s2,&DWP(3,$te,$s0,8));        #  1
345         &mov    ($s0,$__s0);                    # s[0]=t[0]
346         &movz   ($v0,&LB($s3));                 # 13,12, 7, 6*
347         &shr    ($s3,16);                       #   ,  ,13,12
348         &xor    ($s2,&DWP(2,$te,$v0,8));        #  6
349         &mov    ($key,$__key);                  # reincarnate v0 as key
350         &and    ($s3,0xff);                     #   ,  ,13,12*
351         &mov    ($s3,&DWP(0,$te,$s3,8));        # 12
352         &xor    ($s3,$s2);                      # s[2]=t[3] collected
353         &mov    ($s2,$v1);                      # s[2]=t[2]
354 }
355
356 # More experimental code... SSE one... Even though this one eliminates
357 # *all* references to stack, it's not faster...
358 sub sse_encbody()
359 {
360         &movz   ($acc,&LB("eax"));              #  0
361         &mov    ("ecx",&DWP(0,$tbl,$acc,8));    #  0
362         &pshufw ("mm2","mm0",0x0d);             #  7, 6, 3, 2
363         &movz   ("edx",&HB("eax"));             #  1
364         &mov    ("edx",&DWP(3,$tbl,"edx",8));   #  1
365         &shr    ("eax",16);                     #  5, 4
366
367         &movz   ($acc,&LB("ebx"));              # 10
368         &xor    ("ecx",&DWP(2,$tbl,$acc,8));    # 10
369         &pshufw ("mm6","mm4",0x08);             # 13,12, 9, 8
370         &movz   ($acc,&HB("ebx"));              # 11
371         &xor    ("edx",&DWP(1,$tbl,$acc,8));    # 11
372         &shr    ("ebx",16);                     # 15,14
373
374         &movz   ($acc,&HB("eax"));              #  5
375         &xor    ("ecx",&DWP(3,$tbl,$acc,8));    #  5
376         &movq   ("mm3",QWP(16,$key));
377         &movz   ($acc,&HB("ebx"));              # 15
378         &xor    ("ecx",&DWP(1,$tbl,$acc,8));    # 15
379         &movd   ("mm0","ecx");                  # t[0] collected
380
381         &movz   ($acc,&LB("eax"));              #  4
382         &mov    ("ecx",&DWP(0,$tbl,$acc,8));    #  4
383         &movd   ("eax","mm2");                  #  7, 6, 3, 2
384         &movz   ($acc,&LB("ebx"));              # 14
385         &xor    ("ecx",&DWP(2,$tbl,$acc,8));    # 14
386         &movd   ("ebx","mm6");                  # 13,12, 9, 8
387
388         &movz   ($acc,&HB("eax"));              #  3
389         &xor    ("ecx",&DWP(1,$tbl,$acc,8));    #  3
390         &movz   ($acc,&HB("ebx"));              #  9
391         &xor    ("ecx",&DWP(3,$tbl,$acc,8));    #  9
392         &movd   ("mm1","ecx");                  # t[1] collected
393
394         &movz   ($acc,&LB("eax"));              #  2
395         &mov    ("ecx",&DWP(2,$tbl,$acc,8));    #  2
396         &shr    ("eax",16);                     #  7, 6
397         &punpckldq      ("mm0","mm1");          # t[0,1] collected
398         &movz   ($acc,&LB("ebx"));              #  8
399         &xor    ("ecx",&DWP(0,$tbl,$acc,8));    #  8
400         &shr    ("ebx",16);                     # 13,12
401
402         &movz   ($acc,&HB("eax"));              #  7
403         &xor    ("ecx",&DWP(1,$tbl,$acc,8));    #  7
404         &pxor   ("mm0","mm3");
405         &movz   ("eax",&LB("eax"));             #  6
406         &xor    ("edx",&DWP(2,$tbl,"eax",8));   #  6
407         &pshufw ("mm1","mm0",0x08);             #  5, 4, 1, 0
408         &movz   ($acc,&HB("ebx"));              # 13
409         &xor    ("ecx",&DWP(3,$tbl,$acc,8));    # 13
410         &xor    ("ecx",&DWP(24,$key));          # t[2]
411         &movd   ("mm4","ecx");                  # t[2] collected
412         &movz   ("ebx",&LB("ebx"));             # 12
413         &xor    ("edx",&DWP(0,$tbl,"ebx",8));   # 12
414         &shr    ("ecx",16);
415         &movd   ("eax","mm1");                  #  5, 4, 1, 0
416         &mov    ("ebx",&DWP(28,$key));          # t[3]
417         &xor    ("ebx","edx");
418         &movd   ("mm5","ebx");                  # t[3] collected
419         &and    ("ebx",0xffff0000);
420         &or     ("ebx","ecx");
421
422         &punpckldq      ("mm4","mm5");          # t[2,3] collected
423 }
424
425 ######################################################################
426 # "Compact" block function
427 ######################################################################
428
429 sub enccompact()
430 { my $Fn = mov;
431   while ($#_>5) { pop(@_); $Fn=sub{}; }
432   my ($i,$te,@s)=@_;
433   my $tmp = $key;
434   my $out = $i==3?$s[0]:$acc;
435
436         # $Fn is used in first compact round and its purpose is to
437         # void restoration of some values from stack, so that after
438         # 4xenccompact with extra argument $key value is left there...
439         if ($i==3)  {   &$Fn    ($key,$__key);                  }##%edx
440         else        {   &mov    ($out,$s[0]);                   }
441                         &and    ($out,0xFF);
442         if ($i==1)  {   &shr    ($s[0],16);                     }#%ebx[1]
443         if ($i==2)  {   &shr    ($s[0],24);                     }#%ecx[2]
444                         &movz   ($out,&BP(-128,$te,$out,1));
445
446         if ($i==3)  {   $tmp=$s[1];                             }##%eax
447                         &movz   ($tmp,&HB($s[1]));
448                         &movz   ($tmp,&BP(-128,$te,$tmp,1));
449                         &shl    ($tmp,8);
450                         &xor    ($out,$tmp);
451
452         if ($i==3)  {   $tmp=$s[2]; &mov ($s[1],$__s0);         }##%ebx
453         else        {   &mov    ($tmp,$s[2]);
454                         &shr    ($tmp,16);                      }
455         if ($i==2)  {   &and    ($s[1],0xFF);                   }#%edx[2]
456                         &and    ($tmp,0xFF);
457                         &movz   ($tmp,&BP(-128,$te,$tmp,1));
458                         &shl    ($tmp,16);
459                         &xor    ($out,$tmp);
460
461         if ($i==3)  {   $tmp=$s[3]; &mov ($s[2],$__s1);         }##%ecx
462         elsif($i==2){   &movz   ($tmp,&HB($s[3]));              }#%ebx[2]
463         else        {   &mov    ($tmp,$s[3]);
464                         &shr    ($tmp,24);                      }
465                         &movz   ($tmp,&BP(-128,$te,$tmp,1));
466                         &shl    ($tmp,24);
467                         &xor    ($out,$tmp);
468         if ($i<2)   {   &mov    (&DWP(4+4*$i,"esp"),$out);      }
469         if ($i==3)  {   &mov    ($s[3],$acc);                   }
470         &comment();
471 }
472
473 sub enctransform()
474 { my @s = ($s0,$s1,$s2,$s3);
475   my $i = shift;
476   my $tmp = $tbl;
477   my $r2  = $key ;
478
479         &mov    ($acc,$s[$i]);
480         &and    ($acc,0x80808080);
481         &mov    ($tmp,$acc);
482         &shr    ($tmp,7);
483         &lea    ($r2,&DWP(0,$s[$i],$s[$i]));
484         &sub    ($acc,$tmp);
485         &and    ($r2,0xfefefefe);
486         &and    ($acc,0x1b1b1b1b);
487         &mov    ($tmp,$s[$i]);
488         &xor    ($acc,$r2);     # r2
489
490         &xor    ($s[$i],$acc);  # r0 ^ r2
491         &rotl   ($s[$i],24);
492         &xor    ($s[$i],$acc)   # ROTATE(r2^r0,24) ^ r2
493         &rotr   ($tmp,16);
494         &xor    ($s[$i],$tmp);
495         &rotr   ($tmp,8);
496         &xor    ($s[$i],$tmp);
497 }
498
499 &function_begin_B("_x86_AES_encrypt_compact");
500         # note that caller is expected to allocate stack frame for me!
501         &mov    ($__key,$key);                  # save key
502
503         &xor    ($s0,&DWP(0,$key));             # xor with key
504         &xor    ($s1,&DWP(4,$key));
505         &xor    ($s2,&DWP(8,$key));
506         &xor    ($s3,&DWP(12,$key));
507
508         &mov    ($acc,&DWP(240,$key));          # load key->rounds
509         &lea    ($acc,&DWP(-2,$acc,$acc));
510         &lea    ($acc,&DWP(0,$key,$acc,8));
511         &mov    ($__end,$acc);                  # end of key schedule
512
513         # prefetch Te4
514         &mov    ($key,&DWP(0-128,$tbl));
515         &mov    ($acc,&DWP(32-128,$tbl));
516         &mov    ($key,&DWP(64-128,$tbl));
517         &mov    ($acc,&DWP(96-128,$tbl));
518         &mov    ($key,&DWP(128-128,$tbl));
519         &mov    ($acc,&DWP(160-128,$tbl));
520         &mov    ($key,&DWP(192-128,$tbl));
521         &mov    ($acc,&DWP(224-128,$tbl));
522
523         &set_label("loop",16);
524
525                 &enccompact(0,$tbl,$s0,$s1,$s2,$s3,1);
526                 &enccompact(1,$tbl,$s1,$s2,$s3,$s0,1);
527                 &enccompact(2,$tbl,$s2,$s3,$s0,$s1,1);
528                 &enccompact(3,$tbl,$s3,$s0,$s1,$s2,1);
529                 &enctransform(2);
530                 &enctransform(3);
531                 &enctransform(0);
532                 &enctransform(1);
533                 &mov    ($key,$__key);
534                 &mov    ($tbl,$__tbl);
535                 &add    ($key,16);              # advance rd_key
536                 &xor    ($s0,&DWP(0,$key));
537                 &xor    ($s1,&DWP(4,$key));
538                 &xor    ($s2,&DWP(8,$key));
539                 &xor    ($s3,&DWP(12,$key));
540
541         &cmp    ($key,$__end);
542         &mov    ($__key,$key);
543         &jb     (&label("loop"));
544
545         &enccompact(0,$tbl,$s0,$s1,$s2,$s3);
546         &enccompact(1,$tbl,$s1,$s2,$s3,$s0);
547         &enccompact(2,$tbl,$s2,$s3,$s0,$s1);
548         &enccompact(3,$tbl,$s3,$s0,$s1,$s2);
549
550         &xor    ($s0,&DWP(16,$key));
551         &xor    ($s1,&DWP(20,$key));
552         &xor    ($s2,&DWP(24,$key));
553         &xor    ($s3,&DWP(28,$key));
554
555         &ret    ();
556 &function_end_B("_x86_AES_encrypt_compact");
557
558 ######################################################################
559 # "Compact" SSE block function.
560 ######################################################################
561 #
562 # Performance is not actually extraordinary in comparison to pure
563 # x86 code. In particular encrypt performance is virtually the same.
564 # Decrypt performance on the other hand is 15-20% better on newer
565 # µ-archs [but we're thankful for *any* improvement here], and ~50%
566 # better on PIII:-) And additionally on the pros side this code
567 # eliminates redundant references to stack and thus relieves/
568 # minimizes the pressure on the memory bus.
569 #
570 # MMX register layout                           lsb
571 # +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
572 # |          mm4          |          mm0          |
573 # +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
574 # |     s3    |     s2    |     s1    |     s0    |    
575 # +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
576 # |15|14|13|12|11|10| 9| 8| 7| 6| 5| 4| 3| 2| 1| 0|
577 # +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
578 #
579 # Indexes translate as s[N/4]>>(8*(N%4)), e.g. 5 means s1>>8.
580 # In this terms encryption and decryption "compact" permutation
581 # matrices can be depicted as following:
582 #
583 # encryption              lsb   # decryption              lsb
584 # +----++----+----+----+----+   # +----++----+----+----+----+
585 # | t0 || 15 | 10 |  5 |  0 |   # | t0 ||  7 | 10 | 13 |  0 |
586 # +----++----+----+----+----+   # +----++----+----+----+----+
587 # | t1 ||  3 | 14 |  9 |  4 |   # | t1 || 11 | 14 |  1 |  4 |
588 # +----++----+----+----+----+   # +----++----+----+----+----+
589 # | t2 ||  7 |  2 | 13 |  8 |   # | t2 || 15 |  2 |  5 |  8 |
590 # +----++----+----+----+----+   # +----++----+----+----+----+
591 # | t3 || 11 |  6 |  1 | 12 |   # | t3 ||  3 |  6 |  9 | 12 |
592 # +----++----+----+----+----+   # +----++----+----+----+----+
593 #
594 ######################################################################
595 # Why not xmm registers? Short answer. It was actually tested and
596 # was not any faster, but *contrary*, most notably on Intel CPUs.
597 # Longer answer. Main advantage of using mm registers is that movd
598 # latency is lower, especially on Intel P4. While arithmetic
599 # instructions are twice as many, they can be scheduled every cycle
600 # and not every second one when they are operating on xmm register,
601 # so that "arithmetic throughput" remains virtually the same. And
602 # finally the code can be executed even on elder SSE-only CPUs:-)
603
604 sub sse_enccompact()
605 {
606         &pshufw ("mm1","mm0",0x08);             #  5, 4, 1, 0
607         &pshufw ("mm5","mm4",0x0d);             # 15,14,11,10
608         &movd   ("eax","mm1");                  #  5, 4, 1, 0
609         &movd   ("ebx","mm5");                  # 15,14,11,10
610
611         &movz   ($acc,&LB("eax"));              #  0
612         &movz   ("ecx",&BP(-128,$tbl,$acc,1));  #  0
613         &pshufw ("mm2","mm0",0x0d);             #  7, 6, 3, 2
614         &movz   ("edx",&HB("eax"));             #  1
615         &movz   ("edx",&BP(-128,$tbl,"edx",1)); #  1
616         &shl    ("edx",8);                      #  1
617         &shr    ("eax",16);                     #  5, 4
618
619         &movz   ($acc,&LB("ebx"));              # 10
620         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 10
621         &shl    ($acc,16);                      # 10
622         &or     ("ecx",$acc);                   # 10
623         &pshufw ("mm6","mm4",0x08);             # 13,12, 9, 8
624         &movz   ($acc,&HB("ebx"));              # 11
625         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 11
626         &shl    ($acc,24);                      # 11
627         &or     ("edx",$acc);                   # 11
628         &shr    ("ebx",16);                     # 15,14
629
630         &movz   ($acc,&HB("eax"));              #  5
631         &movz   ($acc,&BP(-128,$tbl,$acc,1));   #  5
632         &shl    ($acc,8);                       #  5
633         &or     ("ecx",$acc);                   #  5
634         &movz   ($acc,&HB("ebx"));              # 15
635         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 15
636         &shl    ($acc,24);                      # 15
637         &or     ("ecx",$acc);                   # 15
638         &movd   ("mm0","ecx");                  # t[0] collected
639
640         &movz   ($acc,&LB("eax"));              #  4
641         &movz   ("ecx",&BP(-128,$tbl,$acc,1));  #  4
642         &movd   ("eax","mm2");                  #  7, 6, 3, 2
643         &movz   ($acc,&LB("ebx"));              # 14
644         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 14
645         &shl    ($acc,16);                      # 14
646         &or     ("ecx",$acc);                   # 14
647
648         &movd   ("ebx","mm6");                  # 13,12, 9, 8
649         &movz   ($acc,&HB("eax"));              #  3
650         &movz   ($acc,&BP(-128,$tbl,$acc,1));   #  3
651         &shl    ($acc,24);                      #  3
652         &or     ("ecx",$acc);                   #  3
653         &movz   ($acc,&HB("ebx"));              #  9
654         &movz   ($acc,&BP(-128,$tbl,$acc,1));   #  9
655         &shl    ($acc,8);                       #  9
656         &or     ("ecx",$acc);                   #  9
657         &movd   ("mm1","ecx");                  # t[1] collected
658
659         &movz   ($acc,&LB("ebx"));              #  8
660         &movz   ("ecx",&BP(-128,$tbl,$acc,1));  #  8
661         &shr    ("ebx",16);                     # 13,12
662         &movz   ($acc,&LB("eax"));              #  2
663         &movz   ($acc,&BP(-128,$tbl,$acc,1));   #  2
664         &shl    ($acc,16);                      #  2
665         &or     ("ecx",$acc);                   #  2
666         &shr    ("eax",16);                     #  7, 6
667
668         &punpckldq      ("mm0","mm1");          # t[0,1] collected
669
670         &movz   ($acc,&HB("eax"));              #  7
671         &movz   ($acc,&BP(-128,$tbl,$acc,1));   #  7
672         &shl    ($acc,24);                      #  7
673         &or     ("ecx",$acc);                   #  7
674         &and    ("eax",0xff);                   #  6
675         &movz   ("eax",&BP(-128,$tbl,"eax",1)); #  6
676         &shl    ("eax",16);                     #  6
677         &or     ("edx","eax");                  #  6
678         &movz   ($acc,&HB("ebx"));              # 13
679         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 13
680         &shl    ($acc,8);                       # 13
681         &or     ("ecx",$acc);                   # 13
682         &movd   ("mm4","ecx");                  # t[2] collected
683         &and    ("ebx",0xff);                   # 12
684         &movz   ("ebx",&BP(-128,$tbl,"ebx",1)); # 12
685         &or     ("edx","ebx");                  # 12
686         &movd   ("mm5","edx");                  # t[3] collected
687
688         &punpckldq      ("mm4","mm5");          # t[2,3] collected
689 }
690
691                                         if (!$x86only) {
692 &function_begin_B("_sse_AES_encrypt_compact");
693         &pxor   ("mm0",&QWP(0,$key));   #  7, 6, 5, 4, 3, 2, 1, 0
694         &pxor   ("mm4",&QWP(8,$key));   # 15,14,13,12,11,10, 9, 8
695
696         # note that caller is expected to allocate stack frame for me!
697         &mov    ($acc,&DWP(240,$key));          # load key->rounds
698         &lea    ($acc,&DWP(-2,$acc,$acc));
699         &lea    ($acc,&DWP(0,$key,$acc,8));
700         &mov    ($__end,$acc);                  # end of key schedule
701
702         &mov    ($s0,0x1b1b1b1b);               # magic constant
703         &mov    (&DWP(8,"esp"),$s0);
704         &mov    (&DWP(12,"esp"),$s0);
705
706         # prefetch Te4
707         &mov    ($s0,&DWP(0-128,$tbl));
708         &mov    ($s1,&DWP(32-128,$tbl));
709         &mov    ($s2,&DWP(64-128,$tbl));
710         &mov    ($s3,&DWP(96-128,$tbl));
711         &mov    ($s0,&DWP(128-128,$tbl));
712         &mov    ($s1,&DWP(160-128,$tbl));
713         &mov    ($s2,&DWP(192-128,$tbl));
714         &mov    ($s3,&DWP(224-128,$tbl));
715
716         &set_label("loop",16);
717                 &sse_enccompact();
718                 &add    ($key,16);
719                 &cmp    ($key,$__end);
720                 &ja     (&label("out"));
721
722                 &movq   ("mm2",&QWP(8,"esp"));
723                 &pxor   ("mm3","mm3");          &pxor   ("mm7","mm7");
724                 &movq   ("mm1","mm0");          &movq   ("mm5","mm4");  # r0
725                 &pcmpgtb("mm3","mm0");          &pcmpgtb("mm7","mm4");
726                 &pand   ("mm3","mm2");          &pand   ("mm7","mm2");
727                 &pshufw ("mm2","mm0",0xb1);     &pshufw ("mm6","mm4",0xb1);# ROTATE(r0,16)
728                 &paddb  ("mm0","mm0");          &paddb  ("mm4","mm4");
729                 &pxor   ("mm0","mm3");          &pxor   ("mm4","mm7");  # = r2
730                 &pshufw ("mm3","mm2",0xb1);     &pshufw ("mm7","mm6",0xb1);# r0
731                 &pxor   ("mm1","mm0");          &pxor   ("mm5","mm4");  # r0^r2
732                 &pxor   ("mm0","mm2");          &pxor   ("mm4","mm6");  # ^= ROTATE(r0,16)
733
734                 &movq   ("mm2","mm3");          &movq   ("mm6","mm7");
735                 &pslld  ("mm3",8);              &pslld  ("mm7",8);
736                 &psrld  ("mm2",24);             &psrld  ("mm6",24);
737                 &pxor   ("mm0","mm3");          &pxor   ("mm4","mm7");  # ^= r0<<8
738                 &pxor   ("mm0","mm2");          &pxor   ("mm4","mm6");  # ^= r0>>24
739
740                 &movq   ("mm3","mm1");          &movq   ("mm7","mm5");
741                 &movq   ("mm2",&QWP(0,$key));   &movq   ("mm6",&QWP(8,$key));
742                 &psrld  ("mm1",8);              &psrld  ("mm5",8);
743                 &mov    ($s0,&DWP(0-128,$tbl));
744                 &pslld  ("mm3",24);             &pslld  ("mm7",24);
745                 &mov    ($s1,&DWP(64-128,$tbl));
746                 &pxor   ("mm0","mm1");          &pxor   ("mm4","mm5");  # ^= (r2^r0)<<8
747                 &mov    ($s2,&DWP(128-128,$tbl));
748                 &pxor   ("mm0","mm3");          &pxor   ("mm4","mm7");  # ^= (r2^r0)>>24
749                 &mov    ($s3,&DWP(192-128,$tbl));
750
751                 &pxor   ("mm0","mm2");          &pxor   ("mm4","mm6");
752         &jmp    (&label("loop"));
753
754         &set_label("out",16);
755         &pxor   ("mm0",&QWP(0,$key));
756         &pxor   ("mm4",&QWP(8,$key));
757
758         &ret    ();
759 &function_end_B("_sse_AES_encrypt_compact");
760                                         }
761
762 ######################################################################
763 # Vanilla block function.
764 ######################################################################
765
766 sub encstep()
767 { my ($i,$te,@s) = @_;
768   my $tmp = $key;
769   my $out = $i==3?$s[0]:$acc;
770
771         # lines marked with #%e?x[i] denote "reordered" instructions...
772         if ($i==3)  {   &mov    ($key,$__key);                  }##%edx
773         else        {   &mov    ($out,$s[0]);
774                         &and    ($out,0xFF);                    }
775         if ($i==1)  {   &shr    ($s[0],16);                     }#%ebx[1]
776         if ($i==2)  {   &shr    ($s[0],24);                     }#%ecx[2]
777                         &mov    ($out,&DWP(0,$te,$out,8));
778
779         if ($i==3)  {   $tmp=$s[1];                             }##%eax
780                         &movz   ($tmp,&HB($s[1]));
781                         &xor    ($out,&DWP(3,$te,$tmp,8));
782
783         if ($i==3)  {   $tmp=$s[2]; &mov ($s[1],$__s0);         }##%ebx
784         else        {   &mov    ($tmp,$s[2]);
785                         &shr    ($tmp,16);                      }
786         if ($i==2)  {   &and    ($s[1],0xFF);                   }#%edx[2]
787                         &and    ($tmp,0xFF);
788                         &xor    ($out,&DWP(2,$te,$tmp,8));
789
790         if ($i==3)  {   $tmp=$s[3]; &mov ($s[2],$__s1);         }##%ecx
791         elsif($i==2){   &movz   ($tmp,&HB($s[3]));              }#%ebx[2]
792         else        {   &mov    ($tmp,$s[3]); 
793                         &shr    ($tmp,24)                       }
794                         &xor    ($out,&DWP(1,$te,$tmp,8));
795         if ($i<2)   {   &mov    (&DWP(4+4*$i,"esp"),$out);      }
796         if ($i==3)  {   &mov    ($s[3],$acc);                   }
797                         &comment();
798 }
799
800 sub enclast()
801 { my ($i,$te,@s)=@_;
802   my $tmp = $key;
803   my $out = $i==3?$s[0]:$acc;
804
805         if ($i==3)  {   &mov    ($key,$__key);                  }##%edx
806         else        {   &mov    ($out,$s[0]);                   }
807                         &and    ($out,0xFF);
808         if ($i==1)  {   &shr    ($s[0],16);                     }#%ebx[1]
809         if ($i==2)  {   &shr    ($s[0],24);                     }#%ecx[2]
810                         &mov    ($out,&DWP(2,$te,$out,8));
811                         &and    ($out,0x000000ff);
812
813         if ($i==3)  {   $tmp=$s[1];                             }##%eax
814                         &movz   ($tmp,&HB($s[1]));
815                         &mov    ($tmp,&DWP(0,$te,$tmp,8));
816                         &and    ($tmp,0x0000ff00);
817                         &xor    ($out,$tmp);
818
819         if ($i==3)  {   $tmp=$s[2]; &mov ($s[1],$__s0);         }##%ebx
820         else        {   &mov    ($tmp,$s[2]);
821                         &shr    ($tmp,16);                      }
822         if ($i==2)  {   &and    ($s[1],0xFF);                   }#%edx[2]
823                         &and    ($tmp,0xFF);
824                         &mov    ($tmp,&DWP(0,$te,$tmp,8));
825                         &and    ($tmp,0x00ff0000);
826                         &xor    ($out,$tmp);
827
828         if ($i==3)  {   $tmp=$s[3]; &mov ($s[2],$__s1);         }##%ecx
829         elsif($i==2){   &movz   ($tmp,&HB($s[3]));              }#%ebx[2]
830         else        {   &mov    ($tmp,$s[3]);
831                         &shr    ($tmp,24);                      }
832                         &mov    ($tmp,&DWP(2,$te,$tmp,8));
833                         &and    ($tmp,0xff000000);
834                         &xor    ($out,$tmp);
835         if ($i<2)   {   &mov    (&DWP(4+4*$i,"esp"),$out);      }
836         if ($i==3)  {   &mov    ($s[3],$acc);                   }
837 }
838
839 &function_begin_B("_x86_AES_encrypt");
840         if ($vertical_spin) {
841                 # I need high parts of volatile registers to be accessible...
842                 &exch   ($s1="edi",$key="ebx");
843                 &mov    ($s2="esi",$acc="ecx");
844         }
845
846         # note that caller is expected to allocate stack frame for me!
847         &mov    ($__key,$key);                  # save key
848
849         &xor    ($s0,&DWP(0,$key));             # xor with key
850         &xor    ($s1,&DWP(4,$key));
851         &xor    ($s2,&DWP(8,$key));
852         &xor    ($s3,&DWP(12,$key));
853
854         &mov    ($acc,&DWP(240,$key));          # load key->rounds
855
856         if ($small_footprint) {
857             &lea        ($acc,&DWP(-2,$acc,$acc));
858             &lea        ($acc,&DWP(0,$key,$acc,8));
859             &mov        ($__end,$acc);          # end of key schedule
860
861             &set_label("loop",16);
862                 if ($vertical_spin) {
863                     &encvert($tbl,$s0,$s1,$s2,$s3);
864                 } else {
865                     &encstep(0,$tbl,$s0,$s1,$s2,$s3);
866                     &encstep(1,$tbl,$s1,$s2,$s3,$s0);
867                     &encstep(2,$tbl,$s2,$s3,$s0,$s1);
868                     &encstep(3,$tbl,$s3,$s0,$s1,$s2);
869                 }
870                 &add    ($key,16);              # advance rd_key
871                 &xor    ($s0,&DWP(0,$key));
872                 &xor    ($s1,&DWP(4,$key));
873                 &xor    ($s2,&DWP(8,$key));
874                 &xor    ($s3,&DWP(12,$key));
875             &cmp        ($key,$__end);
876             &mov        ($__key,$key);
877             &jb         (&label("loop"));
878         }
879         else {
880             &cmp        ($acc,10);
881             &jle        (&label("10rounds"));
882             &cmp        ($acc,12);
883             &jle        (&label("12rounds"));
884
885         &set_label("14rounds",4);
886             for ($i=1;$i<3;$i++) {
887                 if ($vertical_spin) {
888                     &encvert($tbl,$s0,$s1,$s2,$s3);
889                 } else {
890                     &encstep(0,$tbl,$s0,$s1,$s2,$s3);
891                     &encstep(1,$tbl,$s1,$s2,$s3,$s0);
892                     &encstep(2,$tbl,$s2,$s3,$s0,$s1);
893                     &encstep(3,$tbl,$s3,$s0,$s1,$s2);
894                 }
895                 &xor    ($s0,&DWP(16*$i+0,$key));
896                 &xor    ($s1,&DWP(16*$i+4,$key));
897                 &xor    ($s2,&DWP(16*$i+8,$key));
898                 &xor    ($s3,&DWP(16*$i+12,$key));
899             }
900             &add        ($key,32);
901             &mov        ($__key,$key);          # advance rd_key
902         &set_label("12rounds",4);
903             for ($i=1;$i<3;$i++) {
904                 if ($vertical_spin) {
905                     &encvert($tbl,$s0,$s1,$s2,$s3);
906                 } else {
907                     &encstep(0,$tbl,$s0,$s1,$s2,$s3);
908                     &encstep(1,$tbl,$s1,$s2,$s3,$s0);
909                     &encstep(2,$tbl,$s2,$s3,$s0,$s1);
910                     &encstep(3,$tbl,$s3,$s0,$s1,$s2);
911                 }
912                 &xor    ($s0,&DWP(16*$i+0,$key));
913                 &xor    ($s1,&DWP(16*$i+4,$key));
914                 &xor    ($s2,&DWP(16*$i+8,$key));
915                 &xor    ($s3,&DWP(16*$i+12,$key));
916             }
917             &add        ($key,32);
918             &mov        ($__key,$key);          # advance rd_key
919         &set_label("10rounds",4);
920             for ($i=1;$i<10;$i++) {
921                 if ($vertical_spin) {
922                     &encvert($tbl,$s0,$s1,$s2,$s3);
923                 } else {
924                     &encstep(0,$tbl,$s0,$s1,$s2,$s3);
925                     &encstep(1,$tbl,$s1,$s2,$s3,$s0);
926                     &encstep(2,$tbl,$s2,$s3,$s0,$s1);
927                     &encstep(3,$tbl,$s3,$s0,$s1,$s2);
928                 }
929                 &xor    ($s0,&DWP(16*$i+0,$key));
930                 &xor    ($s1,&DWP(16*$i+4,$key));
931                 &xor    ($s2,&DWP(16*$i+8,$key));
932                 &xor    ($s3,&DWP(16*$i+12,$key));
933             }
934         }
935
936         if ($vertical_spin) {
937             # "reincarnate" some registers for "horizontal" spin...
938             &mov        ($s1="ebx",$key="edi");
939             &mov        ($s2="ecx",$acc="esi");
940         }
941         &enclast(0,$tbl,$s0,$s1,$s2,$s3);
942         &enclast(1,$tbl,$s1,$s2,$s3,$s0);
943         &enclast(2,$tbl,$s2,$s3,$s0,$s1);
944         &enclast(3,$tbl,$s3,$s0,$s1,$s2);
945
946         &add    ($key,$small_footprint?16:160);
947         &xor    ($s0,&DWP(0,$key));
948         &xor    ($s1,&DWP(4,$key));
949         &xor    ($s2,&DWP(8,$key));
950         &xor    ($s3,&DWP(12,$key));
951
952         &ret    ();
953
954 &set_label("AES_Te",64);        # Yes! I keep it in the code segment!
955         &_data_word(0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6);
956         &_data_word(0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591);
957         &_data_word(0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56);
958         &_data_word(0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec);
959         &_data_word(0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa);
960         &_data_word(0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb);
961         &_data_word(0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45);
962         &_data_word(0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b);
963         &_data_word(0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c);
964         &_data_word(0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83);
965         &_data_word(0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9);
966         &_data_word(0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a);
967         &_data_word(0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d);
968         &_data_word(0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f);
969         &_data_word(0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df);
970         &_data_word(0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea);
971         &_data_word(0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34);
972         &_data_word(0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b);
973         &_data_word(0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d);
974         &_data_word(0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413);
975         &_data_word(0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1);
976         &_data_word(0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6);
977         &_data_word(0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972);
978         &_data_word(0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85);
979         &_data_word(0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed);
980         &_data_word(0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511);
981         &_data_word(0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe);
982         &_data_word(0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b);
983         &_data_word(0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05);
984         &_data_word(0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1);
985         &_data_word(0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142);
986         &_data_word(0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf);
987         &_data_word(0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3);
988         &_data_word(0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e);
989         &_data_word(0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a);
990         &_data_word(0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6);
991         &_data_word(0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3);
992         &_data_word(0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b);
993         &_data_word(0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428);
994         &_data_word(0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad);
995         &_data_word(0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14);
996         &_data_word(0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8);
997         &_data_word(0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4);
998         &_data_word(0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2);
999         &_data_word(0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda);
1000         &_data_word(0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949);
1001         &_data_word(0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf);
1002         &_data_word(0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810);
1003         &_data_word(0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c);
1004         &_data_word(0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697);
1005         &_data_word(0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e);
1006         &_data_word(0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f);
1007         &_data_word(0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc);
1008         &_data_word(0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c);
1009         &_data_word(0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969);
1010         &_data_word(0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27);
1011         &_data_word(0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122);
1012         &_data_word(0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433);
1013         &_data_word(0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9);
1014         &_data_word(0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5);
1015         &_data_word(0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a);
1016         &_data_word(0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0);
1017         &_data_word(0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e);
1018         &_data_word(0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c);
1019
1020 #Te4    # four copies of Te4 to choose from to avoid L1 aliasing
1021         &data_byte(0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5);
1022         &data_byte(0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76);
1023         &data_byte(0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0);
1024         &data_byte(0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0);
1025         &data_byte(0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc);
1026         &data_byte(0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15);
1027         &data_byte(0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a);
1028         &data_byte(0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75);
1029         &data_byte(0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0);
1030         &data_byte(0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84);
1031         &data_byte(0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b);
1032         &data_byte(0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf);
1033         &data_byte(0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85);
1034         &data_byte(0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8);
1035         &data_byte(0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5);
1036         &data_byte(0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2);
1037         &data_byte(0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17);
1038         &data_byte(0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73);
1039         &data_byte(0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88);
1040         &data_byte(0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb);
1041         &data_byte(0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c);
1042         &data_byte(0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79);
1043         &data_byte(0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9);
1044         &data_byte(0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08);
1045         &data_byte(0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6);
1046         &data_byte(0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a);
1047         &data_byte(0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e);
1048         &data_byte(0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e);
1049         &data_byte(0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94);
1050         &data_byte(0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf);
1051         &data_byte(0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68);
1052         &data_byte(0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16);
1053
1054         &data_byte(0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5);
1055         &data_byte(0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76);
1056         &data_byte(0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0);
1057         &data_byte(0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0);
1058         &data_byte(0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc);
1059         &data_byte(0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15);
1060         &data_byte(0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a);
1061         &data_byte(0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75);
1062         &data_byte(0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0);
1063         &data_byte(0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84);
1064         &data_byte(0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b);
1065         &data_byte(0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf);
1066         &data_byte(0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85);
1067         &data_byte(0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8);
1068         &data_byte(0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5);
1069         &data_byte(0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2);
1070         &data_byte(0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17);
1071         &data_byte(0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73);
1072         &data_byte(0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88);
1073         &data_byte(0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb);
1074         &data_byte(0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c);
1075         &data_byte(0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79);
1076         &data_byte(0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9);
1077         &data_byte(0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08);
1078         &data_byte(0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6);
1079         &data_byte(0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a);
1080         &data_byte(0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e);
1081         &data_byte(0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e);
1082         &data_byte(0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94);
1083         &data_byte(0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf);
1084         &data_byte(0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68);
1085         &data_byte(0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16);
1086
1087         &data_byte(0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5);
1088         &data_byte(0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76);
1089         &data_byte(0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0);
1090         &data_byte(0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0);
1091         &data_byte(0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc);
1092         &data_byte(0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15);
1093         &data_byte(0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a);
1094         &data_byte(0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75);
1095         &data_byte(0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0);
1096         &data_byte(0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84);
1097         &data_byte(0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b);
1098         &data_byte(0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf);
1099         &data_byte(0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85);
1100         &data_byte(0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8);
1101         &data_byte(0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5);
1102         &data_byte(0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2);
1103         &data_byte(0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17);
1104         &data_byte(0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73);
1105         &data_byte(0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88);
1106         &data_byte(0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb);
1107         &data_byte(0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c);
1108         &data_byte(0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79);
1109         &data_byte(0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9);
1110         &data_byte(0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08);
1111         &data_byte(0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6);
1112         &data_byte(0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a);
1113         &data_byte(0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e);
1114         &data_byte(0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e);
1115         &data_byte(0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94);
1116         &data_byte(0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf);
1117         &data_byte(0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68);
1118         &data_byte(0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16);
1119
1120         &data_byte(0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5);
1121         &data_byte(0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76);
1122         &data_byte(0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0);
1123         &data_byte(0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0);
1124         &data_byte(0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc);
1125         &data_byte(0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15);
1126         &data_byte(0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a);
1127         &data_byte(0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75);
1128         &data_byte(0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0);
1129         &data_byte(0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84);
1130         &data_byte(0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b);
1131         &data_byte(0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf);
1132         &data_byte(0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85);
1133         &data_byte(0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8);
1134         &data_byte(0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5);
1135         &data_byte(0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2);
1136         &data_byte(0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17);
1137         &data_byte(0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73);
1138         &data_byte(0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88);
1139         &data_byte(0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb);
1140         &data_byte(0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c);
1141         &data_byte(0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79);
1142         &data_byte(0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9);
1143         &data_byte(0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08);
1144         &data_byte(0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6);
1145         &data_byte(0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a);
1146         &data_byte(0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e);
1147         &data_byte(0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e);
1148         &data_byte(0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94);
1149         &data_byte(0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf);
1150         &data_byte(0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68);
1151         &data_byte(0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16);
1152 #rcon:
1153         &data_word(0x00000001, 0x00000002, 0x00000004, 0x00000008);
1154         &data_word(0x00000010, 0x00000020, 0x00000040, 0x00000080);
1155         &data_word(0x0000001b, 0x00000036, 0x00000000, 0x00000000);
1156         &data_word(0x00000000, 0x00000000, 0x00000000, 0x00000000);
1157 &function_end_B("_x86_AES_encrypt");
1158
1159 # void AES_encrypt (const void *inp,void *out,const AES_KEY *key);
1160 &function_begin("AES_encrypt");
1161         &mov    ($acc,&wparam(0));              # load inp
1162         &mov    ($key,&wparam(2));              # load key
1163
1164         &mov    ($s0,"esp");
1165         &sub    ("esp",36);
1166         &and    ("esp",-64);                    # align to cache-line
1167
1168         # place stack frame just "above" the key schedule
1169         &lea    ($s1,&DWP(-64-63,$key));
1170         &sub    ($s1,"esp");
1171         &neg    ($s1);
1172         &and    ($s1,0x3C0);    # modulo 1024, but aligned to cache-line
1173         &sub    ("esp",$s1);
1174         &add    ("esp",4);      # 4 is reserved for caller's return address
1175         &mov    ($_esp,$s0);                    # save stack pointer
1176
1177         &call   (&label("pic_point"));          # make it PIC!
1178         &set_label("pic_point");
1179         &blindpop($tbl);
1180         &picmeup($s0,"OPENSSL_ia32cap_P",$tbl,&label("pic_point")) if (!$x86only);
1181         &lea    ($tbl,&DWP(&label("AES_Te")."-".&label("pic_point"),$tbl));
1182
1183         # pick Te4 copy which can't "overlap" with stack frame or key schedule
1184         &lea    ($s1,&DWP(768-4,"esp"));
1185         &sub    ($s1,$tbl);
1186         &and    ($s1,0x300);
1187         &lea    ($tbl,&DWP(2048+128,$tbl,$s1));
1188
1189                                         if (!$x86only) {
1190         &bt     (&DWP(0,$s0),25);       # check for SSE bit
1191         &jnc    (&label("x86"));
1192
1193         &movq   ("mm0",&QWP(0,$acc));
1194         &movq   ("mm4",&QWP(8,$acc));
1195         &call   ("_sse_AES_encrypt_compact");
1196         &mov    ("esp",$_esp);                  # restore stack pointer
1197         &mov    ($acc,&wparam(1));              # load out
1198         &movq   (&QWP(0,$acc),"mm0");           # write output data
1199         &movq   (&QWP(8,$acc),"mm4");
1200         &emms   ();
1201         &function_end_A();
1202                                         }
1203         &set_label("x86",16);
1204         &mov    ($_tbl,$tbl);
1205         &mov    ($s0,&DWP(0,$acc));             # load input data
1206         &mov    ($s1,&DWP(4,$acc));
1207         &mov    ($s2,&DWP(8,$acc));
1208         &mov    ($s3,&DWP(12,$acc));
1209         &call   ("_x86_AES_encrypt_compact");
1210         &mov    ("esp",$_esp);                  # restore stack pointer
1211         &mov    ($acc,&wparam(1));              # load out
1212         &mov    (&DWP(0,$acc),$s0);             # write output data
1213         &mov    (&DWP(4,$acc),$s1);
1214         &mov    (&DWP(8,$acc),$s2);
1215         &mov    (&DWP(12,$acc),$s3);
1216 &function_end("AES_encrypt");
1217
1218 #--------------------------------------------------------------------#
1219
1220 ######################################################################
1221 # "Compact" block function
1222 ######################################################################
1223
1224 sub deccompact()
1225 { my $Fn = mov;
1226   while ($#_>5) { pop(@_); $Fn=sub{}; }
1227   my ($i,$td,@s)=@_;
1228   my $tmp = $key;
1229   my $out = $i==3?$s[0]:$acc;
1230
1231         # $Fn is used in first compact round and its purpose is to
1232         # void restoration of some values from stack, so that after
1233         # 4xdeccompact with extra argument $key, $s0 and $s1 values
1234         # are left there...
1235         if($i==3)   {   &$Fn    ($key,$__key);                  }
1236         else        {   &mov    ($out,$s[0]);                   }
1237                         &and    ($out,0xFF);
1238                         &movz   ($out,&BP(-128,$td,$out,1));
1239
1240         if ($i==3)  {   $tmp=$s[1];                             }
1241                         &movz   ($tmp,&HB($s[1]));
1242                         &movz   ($tmp,&BP(-128,$td,$tmp,1));
1243                         &shl    ($tmp,8);
1244                         &xor    ($out,$tmp);
1245
1246         if ($i==3)  {   $tmp=$s[2]; &mov ($s[1],$acc);          }
1247         else        {   mov     ($tmp,$s[2]);                   }
1248                         &shr    ($tmp,16);
1249                         &and    ($tmp,0xFF);
1250                         &movz   ($tmp,&BP(-128,$td,$tmp,1));
1251                         &shl    ($tmp,16);
1252                         &xor    ($out,$tmp);
1253
1254         if ($i==3)  {   $tmp=$s[3]; &$Fn ($s[2],$__s1);         }
1255         else        {   &mov    ($tmp,$s[3]);                   }
1256                         &shr    ($tmp,24);
1257                         &movz   ($tmp,&BP(-128,$td,$tmp,1));
1258                         &shl    ($tmp,24);
1259                         &xor    ($out,$tmp);
1260         if ($i<2)   {   &mov    (&DWP(4+4*$i,"esp"),$out);      }
1261         if ($i==3)  {   &$Fn    ($s[3],$__s0);                  }
1262 }
1263
1264 # must be called with 2,3,0,1 as argument sequence!!!
1265 sub dectransform()
1266 { my @s = ($s0,$s1,$s2,$s3);
1267   my $i = shift;
1268   my $tmp = $key;
1269   my $tp2 = @s[($i+2)%4]; $tp2 = @s[2] if ($i==1);
1270   my $tp4 = @s[($i+3)%4]; $tp4 = @s[3] if ($i==1);
1271   my $tp8 = $tbl;
1272
1273         &mov    ($acc,$s[$i]);
1274         &and    ($acc,0x80808080);
1275         &mov    ($tmp,$acc);
1276         &shr    ($tmp,7);
1277         &lea    ($tp2,&DWP(0,$s[$i],$s[$i]));
1278         &sub    ($acc,$tmp);
1279         &and    ($tp2,0xfefefefe);
1280         &and    ($acc,0x1b1b1b1b);
1281         &xor    ($acc,$tp2);
1282         &mov    ($tp2,$acc);
1283
1284         &and    ($acc,0x80808080);
1285         &mov    ($tmp,$acc);
1286         &shr    ($tmp,7);
1287         &lea    ($tp4,&DWP(0,$tp2,$tp2));
1288         &sub    ($acc,$tmp);
1289         &and    ($tp4,0xfefefefe);
1290         &and    ($acc,0x1b1b1b1b);
1291          &xor   ($tp2,$s[$i]);  # tp2^tp1
1292         &xor    ($acc,$tp4);
1293         &mov    ($tp4,$acc);
1294
1295         &and    ($acc,0x80808080);
1296         &mov    ($tmp,$acc);
1297         &shr    ($tmp,7);
1298         &lea    ($tp8,&DWP(0,$tp4,$tp4));
1299         &sub    ($acc,$tmp);
1300         &and    ($tp8,0xfefefefe);
1301         &and    ($acc,0x1b1b1b1b);
1302          &xor   ($tp4,$s[$i]);  # tp4^tp1
1303          &rotl  ($s[$i],8);     # = ROTATE(tp1,8)
1304         &xor    ($tp8,$acc);
1305
1306         &xor    ($s[$i],$tp2);
1307         &xor    ($tp2,$tp8);
1308         &rotl   ($tp2,24);
1309         &xor    ($s[$i],$tp4);
1310         &xor    ($tp4,$tp8);
1311         &rotl   ($tp4,16);
1312         &xor    ($s[$i],$tp8);  # ^= tp8^(tp4^tp1)^(tp2^tp1)
1313         &rotl   ($tp8,8);
1314         &xor    ($s[$i],$tp2);  # ^= ROTATE(tp8^tp2^tp1,24)
1315         &xor    ($s[$i],$tp4);  # ^= ROTATE(tp8^tp4^tp1,16)
1316          &mov   ($s[0],$__s0)                   if($i==2); #prefetch $s0
1317          &mov   ($s[1],$__s1)                   if($i==3); #prefetch $s1
1318          &mov   ($s[2],$__s2)                   if($i==1);
1319         &xor    ($s[$i],$tp8);  # ^= ROTATE(tp8,8)
1320
1321         &mov    ($s[3],$__s3)                   if($i==1);
1322         &mov    (&DWP(4+4*$i,"esp"),$s[$i])     if($i>=2);
1323 }
1324
1325 &function_begin_B("_x86_AES_decrypt_compact");
1326         # note that caller is expected to allocate stack frame for me!
1327         &mov    ($__key,$key);                  # save key
1328
1329         &xor    ($s0,&DWP(0,$key));             # xor with key
1330         &xor    ($s1,&DWP(4,$key));
1331         &xor    ($s2,&DWP(8,$key));
1332         &xor    ($s3,&DWP(12,$key));
1333
1334         &mov    ($acc,&DWP(240,$key));          # load key->rounds
1335
1336         &lea    ($acc,&DWP(-2,$acc,$acc));
1337         &lea    ($acc,&DWP(0,$key,$acc,8));
1338         &mov    ($__end,$acc);                  # end of key schedule
1339
1340         # prefetch Td4
1341         &mov    ($key,&DWP(0-128,$tbl));
1342         &mov    ($acc,&DWP(32-128,$tbl));
1343         &mov    ($key,&DWP(64-128,$tbl));
1344         &mov    ($acc,&DWP(96-128,$tbl));
1345         &mov    ($key,&DWP(128-128,$tbl));
1346         &mov    ($acc,&DWP(160-128,$tbl));
1347         &mov    ($key,&DWP(192-128,$tbl));
1348         &mov    ($acc,&DWP(224-128,$tbl));
1349
1350         &set_label("loop",16);
1351
1352                 &deccompact(0,$tbl,$s0,$s3,$s2,$s1,1);
1353                 &deccompact(1,$tbl,$s1,$s0,$s3,$s2,1);
1354                 &deccompact(2,$tbl,$s2,$s1,$s0,$s3,1);
1355                 &deccompact(3,$tbl,$s3,$s2,$s1,$s0,1);
1356                 &dectransform(2);
1357                 &dectransform(3);
1358                 &dectransform(0);
1359                 &dectransform(1);
1360                 &mov    ($key,$__key);
1361                 &mov    ($tbl,$__tbl);
1362                 &add    ($key,16);              # advance rd_key
1363                 &xor    ($s0,&DWP(0,$key));
1364                 &xor    ($s1,&DWP(4,$key));
1365                 &xor    ($s2,&DWP(8,$key));
1366                 &xor    ($s3,&DWP(12,$key));
1367
1368         &cmp    ($key,$__end);
1369         &mov    ($__key,$key);
1370         &jb     (&label("loop"));
1371
1372         &deccompact(0,$tbl,$s0,$s3,$s2,$s1);
1373         &deccompact(1,$tbl,$s1,$s0,$s3,$s2);
1374         &deccompact(2,$tbl,$s2,$s1,$s0,$s3);
1375         &deccompact(3,$tbl,$s3,$s2,$s1,$s0);
1376
1377         &xor    ($s0,&DWP(16,$key));
1378         &xor    ($s1,&DWP(20,$key));
1379         &xor    ($s2,&DWP(24,$key));
1380         &xor    ($s3,&DWP(28,$key));
1381
1382         &ret    ();
1383 &function_end_B("_x86_AES_decrypt_compact");
1384
1385 ######################################################################
1386 # "Compact" SSE block function.
1387 ######################################################################
1388
1389 sub sse_deccompact()
1390 {
1391         &pshufw ("mm1","mm0",0x0c);             #  7, 6, 1, 0
1392         &movd   ("eax","mm1");                  #  7, 6, 1, 0
1393
1394         &pshufw ("mm5","mm4",0x09);             # 13,12,11,10
1395         &movz   ($acc,&LB("eax"));              #  0
1396         &movz   ("ecx",&BP(-128,$tbl,$acc,1));  #  0
1397         &movd   ("ebx","mm5");                  # 13,12,11,10
1398         &movz   ("edx",&HB("eax"));             #  1
1399         &movz   ("edx",&BP(-128,$tbl,"edx",1)); #  1
1400         &shl    ("edx",8);                      #  1
1401
1402         &pshufw ("mm2","mm0",0x06);             #  3, 2, 5, 4
1403         &movz   ($acc,&LB("ebx"));              # 10
1404         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 10
1405         &shl    ($acc,16);                      # 10
1406         &or     ("ecx",$acc);                   # 10
1407         &shr    ("eax",16);                     #  7, 6
1408         &movz   ($acc,&HB("ebx"));              # 11
1409         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 11
1410         &shl    ($acc,24);                      # 11
1411         &or     ("edx",$acc);                   # 11
1412         &shr    ("ebx",16);                     # 13,12
1413
1414         &pshufw ("mm6","mm4",0x03);             # 9, 8,15,14
1415         &movz   ($acc,&HB("eax"));              #  7
1416         &movz   ($acc,&BP(-128,$tbl,$acc,1));   #  7
1417         &shl    ($acc,24);                      #  7
1418         &or     ("ecx",$acc);                   #  7
1419         &movz   ($acc,&HB("ebx"));              # 13
1420         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 13
1421         &shl    ($acc,8);                       # 13
1422         &or     ("ecx",$acc);                   # 13
1423         &movd   ("mm0","ecx");                  # t[0] collected
1424
1425         &movz   ($acc,&LB("eax"));              #  6
1426         &movd   ("eax","mm2");                  #  3, 2, 5, 4
1427         &movz   ("ecx",&BP(-128,$tbl,$acc,1));  #  6
1428         &shl    ("ecx",16);                     #  6
1429         &movz   ($acc,&LB("ebx"));              # 12
1430         &movd   ("ebx","mm6");                  #  9, 8,15,14
1431         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 12
1432         &or     ("ecx",$acc);                   # 12
1433
1434         &movz   ($acc,&LB("eax"));              #  4
1435         &movz   ($acc,&BP(-128,$tbl,$acc,1));   #  4
1436         &or     ("edx",$acc);                   #  4
1437         &movz   ($acc,&LB("ebx"));              # 14
1438         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 14
1439         &shl    ($acc,16);                      # 14
1440         &or     ("edx",$acc);                   # 14
1441         &movd   ("mm1","edx");                  # t[1] collected
1442
1443         &movz   ($acc,&HB("eax"));              #  5
1444         &movz   ("edx",&BP(-128,$tbl,$acc,1));  #  5
1445         &shl    ("edx",8);                      #  5
1446         &movz   ($acc,&HB("ebx"));              # 15
1447         &shr    ("eax",16);                     #  3, 2
1448         &movz   ($acc,&BP(-128,$tbl,$acc,1));   # 15
1449         &shl    ($acc,24);                      # 15
1450         &or     ("edx",$acc);                   # 15
1451         &shr    ("ebx",16);                     #  9, 8
1452
1453         &punpckldq      ("mm0","mm1");          # t[0,1] collected
1454
1455         &movz   ($acc,&HB("ebx"));              #  9
1456         &movz   ($acc,&BP(-128,$tbl,$acc,1));   #  9
1457         &shl    ($acc,8);                       #  9
1458         &or     ("ecx",$acc);                   #  9
1459         &and    ("ebx",0xff);                   #  8
1460         &movz   ("ebx",&BP(-128,$tbl,"ebx",1)); #  8
1461         &or     ("edx","ebx");                  #  8
1462         &movz   ($acc,&LB("eax"));              #  2
1463         &movz   ($acc,&BP(-128,$tbl,$acc,1));   #  2
1464         &shl    ($acc,16);                      #  2
1465         &or     ("edx",$acc);                   #  2
1466         &movd   ("mm4","edx");                  # t[2] collected
1467         &movz   ("eax",&HB("eax"));             #  3
1468         &movz   ("eax",&BP(-128,$tbl,"eax",1)); #  3
1469         &shl    ("eax",24);                     #  3
1470         &or     ("ecx","eax");                  #  3
1471         &movd   ("mm5","ecx");                  # t[3] collected
1472
1473         &punpckldq      ("mm4","mm5");          # t[2,3] collected
1474 }
1475
1476                                         if (!$x86only) {
1477 &function_begin_B("_sse_AES_decrypt_compact");
1478         &pxor   ("mm0",&QWP(0,$key));   #  7, 6, 5, 4, 3, 2, 1, 0
1479         &pxor   ("mm4",&QWP(8,$key));   # 15,14,13,12,11,10, 9, 8
1480
1481         # note that caller is expected to allocate stack frame for me!
1482         &mov    ($acc,&DWP(240,$key));          # load key->rounds
1483         &lea    ($acc,&DWP(-2,$acc,$acc));
1484         &lea    ($acc,&DWP(0,$key,$acc,8));
1485         &mov    ($__end,$acc);                  # end of key schedule
1486
1487         &mov    ($s0,0x1b1b1b1b);               # magic constant
1488         &mov    (&DWP(8,"esp"),$s0);
1489         &mov    (&DWP(12,"esp"),$s0);
1490
1491         # prefetch Td4
1492         &mov    ($s0,&DWP(0-128,$tbl));
1493         &mov    ($s1,&DWP(32-128,$tbl));
1494         &mov    ($s2,&DWP(64-128,$tbl));
1495         &mov    ($s3,&DWP(96-128,$tbl));
1496         &mov    ($s0,&DWP(128-128,$tbl));
1497         &mov    ($s1,&DWP(160-128,$tbl));
1498         &mov    ($s2,&DWP(192-128,$tbl));
1499         &mov    ($s3,&DWP(224-128,$tbl));
1500
1501         &set_label("loop",16);
1502                 &sse_deccompact();
1503                 &add    ($key,16);
1504                 &cmp    ($key,$__end);
1505                 &ja     (&label("out"));
1506
1507                 # ROTATE(x^y,N) == ROTATE(x,N)^ROTATE(y,N)
1508                 &movq   ("mm3","mm0");          &movq   ("mm7","mm4");
1509                 &movq   ("mm2","mm0",1);        &movq   ("mm6","mm4",1);
1510                 &movq   ("mm1","mm0");          &movq   ("mm5","mm4");
1511                 &pshufw ("mm0","mm0",0xb1);     &pshufw ("mm4","mm4",0xb1);# = ROTATE(tp0,16)
1512                 &pslld  ("mm2",8);              &pslld  ("mm6",8);
1513                 &psrld  ("mm3",8);              &psrld  ("mm7",8);
1514                 &pxor   ("mm0","mm2");          &pxor   ("mm4","mm6");  # ^= tp0<<8
1515                 &pxor   ("mm0","mm3");          &pxor   ("mm4","mm7");  # ^= tp0>>8
1516                 &pslld  ("mm2",16);             &pslld  ("mm6",16);
1517                 &psrld  ("mm3",16);             &psrld  ("mm7",16);
1518                 &pxor   ("mm0","mm2");          &pxor   ("mm4","mm6");  # ^= tp0<<24
1519                 &pxor   ("mm0","mm3");          &pxor   ("mm4","mm7");  # ^= tp0>>24
1520
1521                 &movq   ("mm3",&QWP(8,"esp"));
1522                 &pxor   ("mm2","mm2");          &pxor   ("mm6","mm6");
1523                 &pcmpgtb("mm2","mm1");          &pcmpgtb("mm6","mm5");
1524                 &pand   ("mm2","mm3");          &pand   ("mm6","mm3");
1525                 &paddb  ("mm1","mm1");          &paddb  ("mm5","mm5");
1526                 &pxor   ("mm1","mm2");          &pxor   ("mm5","mm6");  # tp2
1527                 &movq   ("mm3","mm1");          &movq   ("mm7","mm5");
1528                 &movq   ("mm2","mm1");          &movq   ("mm6","mm5");
1529                 &pxor   ("mm0","mm1");          &pxor   ("mm4","mm5");  # ^= tp2
1530                 &pslld  ("mm3",24);             &pslld  ("mm7",24);
1531                 &psrld  ("mm2",8);              &psrld  ("mm6",8);
1532                 &pxor   ("mm0","mm3");          &pxor   ("mm4","mm7");  # ^= tp2<<24
1533                 &pxor   ("mm0","mm2");          &pxor   ("mm4","mm6");  # ^= tp2>>8
1534
1535                 &movq   ("mm2",&QWP(8,"esp"));
1536                 &pxor   ("mm3","mm3");          &pxor   ("mm7","mm7");
1537                 &pcmpgtb("mm3","mm1");          &pcmpgtb("mm7","mm5");
1538                 &pand   ("mm3","mm2");          &pand   ("mm7","mm2");
1539                 &paddb  ("mm1","mm1");          &paddb  ("mm5","mm5");
1540                 &pxor   ("mm1","mm3");          &pxor   ("mm5","mm7");  # tp4
1541                 &pshufw ("mm3","mm1",0xb1);     &pshufw ("mm7","mm5",0xb1);
1542                 &pxor   ("mm0","mm1");          &pxor   ("mm4","mm5");  # ^= tp4
1543                 &pxor   ("mm0","mm3");          &pxor   ("mm4","mm7");  # ^= ROTATE(tp4,16)     
1544
1545                 &pxor   ("mm3","mm3");          &pxor   ("mm7","mm7");
1546                 &pcmpgtb("mm3","mm1");          &pcmpgtb("mm7","mm5");
1547                 &pand   ("mm3","mm2");          &pand   ("mm7","mm2");
1548                 &paddb  ("mm1","mm1");          &paddb  ("mm5","mm5");
1549                 &pxor   ("mm1","mm3");          &pxor   ("mm5","mm7");  # tp8
1550                 &pxor   ("mm0","mm1");          &pxor   ("mm4","mm5");  # ^= tp8
1551                 &movq   ("mm3","mm1");          &movq   ("mm7","mm5");
1552                 &pshufw ("mm2","mm1",0xb1);     &pshufw ("mm6","mm5",0xb1);
1553                 &pxor   ("mm0","mm2");          &pxor   ("mm4","mm6");  # ^= ROTATE(tp8,16)
1554                 &pslld  ("mm1",8);              &pslld  ("mm5",8);
1555                 &psrld  ("mm3",8);              &psrld  ("mm7",8);
1556                 &movq   ("mm2",&QWP(0,$key));   &movq   ("mm6",&QWP(8,$key));
1557                 &pxor   ("mm0","mm1");          &pxor   ("mm4","mm5");  # ^= tp8<<8
1558                 &pxor   ("mm0","mm3");          &pxor   ("mm4","mm7");  # ^= tp8>>8
1559                 &mov    ($s0,&DWP(0-128,$tbl));
1560                 &pslld  ("mm1",16);             &pslld  ("mm5",16);
1561                 &mov    ($s1,&DWP(64-128,$tbl));
1562                 &psrld  ("mm3",16);             &psrld  ("mm7",16);
1563                 &mov    ($s2,&DWP(128-128,$tbl));
1564                 &pxor   ("mm0","mm1");          &pxor   ("mm4","mm5");  # ^= tp8<<24
1565                 &mov    ($s3,&DWP(192-128,$tbl));
1566                 &pxor   ("mm0","mm3");          &pxor   ("mm4","mm7");  # ^= tp8>>24
1567
1568                 &pxor   ("mm0","mm2");          &pxor   ("mm4","mm6");
1569         &jmp    (&label("loop"));
1570
1571         &set_label("out",16);
1572         &pxor   ("mm0",&QWP(0,$key));
1573         &pxor   ("mm4",&QWP(8,$key));
1574
1575         &ret    ();
1576 &function_end_B("_sse_AES_decrypt_compact");
1577                                         }
1578
1579 ######################################################################
1580 # Vanilla block function.
1581 ######################################################################
1582
1583 sub decstep()
1584 { my ($i,$td,@s) = @_;
1585   my $tmp = $key;
1586   my $out = $i==3?$s[0]:$acc;
1587
1588         # no instructions are reordered, as performance appears
1589         # optimal... or rather that all attempts to reorder didn't
1590         # result in better performance [which by the way is not a
1591         # bit lower than ecryption].
1592         if($i==3)   {   &mov    ($key,$__key);                  }
1593         else        {   &mov    ($out,$s[0]);                   }
1594                         &and    ($out,0xFF);
1595                         &mov    ($out,&DWP(0,$td,$out,8));
1596
1597         if ($i==3)  {   $tmp=$s[1];                             }
1598                         &movz   ($tmp,&HB($s[1]));
1599                         &xor    ($out,&DWP(3,$td,$tmp,8));
1600
1601         if ($i==3)  {   $tmp=$s[2]; &mov ($s[1],$acc);          }
1602         else        {   &mov    ($tmp,$s[2]);                   }
1603                         &shr    ($tmp,16);
1604                         &and    ($tmp,0xFF);
1605                         &xor    ($out,&DWP(2,$td,$tmp,8));
1606
1607         if ($i==3)  {   $tmp=$s[3]; &mov ($s[2],$__s1);         }
1608         else        {   &mov    ($tmp,$s[3]);                   }
1609                         &shr    ($tmp,24);
1610                         &xor    ($out,&DWP(1,$td,$tmp,8));
1611         if ($i<2)   {   &mov    (&DWP(4+4*$i,"esp"),$out);      }
1612         if ($i==3)  {   &mov    ($s[3],$__s0);                  }
1613                         &comment();
1614 }
1615
1616 sub declast()
1617 { my ($i,$td,@s)=@_;
1618   my $tmp = $key;
1619   my $out = $i==3?$s[0]:$acc;
1620
1621         if($i==0)   {   &lea    ($td,&DWP(2048+128,$td));
1622                         &mov    ($tmp,&DWP(0-128,$td));
1623                         &mov    ($acc,&DWP(32-128,$td));
1624                         &mov    ($tmp,&DWP(64-128,$td));
1625                         &mov    ($acc,&DWP(96-128,$td));
1626                         &mov    ($tmp,&DWP(128-128,$td));
1627                         &mov    ($acc,&DWP(160-128,$td));
1628                         &mov    ($tmp,&DWP(192-128,$td));
1629                         &mov    ($acc,&DWP(224-128,$td));
1630                         &lea    ($td,&DWP(-128,$td));           }
1631         if($i==3)   {   &mov    ($key,$__key);                  }
1632         else        {   &mov    ($out,$s[0]);                   }
1633                         &and    ($out,0xFF);
1634                         &movz   ($out,&BP(0,$td,$out,1));
1635
1636         if ($i==3)  {   $tmp=$s[1];                             }
1637                         &movz   ($tmp,&HB($s[1]));
1638                         &movz   ($tmp,&BP(0,$td,$tmp,1));
1639                         &shl    ($tmp,8);
1640                         &xor    ($out,$tmp);
1641
1642         if ($i==3)  {   $tmp=$s[2]; &mov ($s[1],$acc);          }
1643         else        {   mov     ($tmp,$s[2]);                   }
1644                         &shr    ($tmp,16);
1645                         &and    ($tmp,0xFF);
1646                         &movz   ($tmp,&BP(0,$td,$tmp,1));
1647                         &shl    ($tmp,16);
1648                         &xor    ($out,$tmp);
1649
1650         if ($i==3)  {   $tmp=$s[3]; &mov ($s[2],$__s1);         }
1651         else        {   &mov    ($tmp,$s[3]);                   }
1652                         &shr    ($tmp,24);
1653                         &movz   ($tmp,&BP(0,$td,$tmp,1));
1654                         &shl    ($tmp,24);
1655                         &xor    ($out,$tmp);
1656         if ($i<2)   {   &mov    (&DWP(4+4*$i,"esp"),$out);      }
1657         if ($i==3)  {   &mov    ($s[3],$__s0);
1658                         &lea    ($td,&DWP(-2048,$td));          }
1659 }
1660
1661 &function_begin_B("_x86_AES_decrypt");
1662         # note that caller is expected to allocate stack frame for me!
1663         &mov    ($__key,$key);                  # save key
1664
1665         &xor    ($s0,&DWP(0,$key));             # xor with key
1666         &xor    ($s1,&DWP(4,$key));
1667         &xor    ($s2,&DWP(8,$key));
1668         &xor    ($s3,&DWP(12,$key));
1669
1670         &mov    ($acc,&DWP(240,$key));          # load key->rounds
1671
1672         if ($small_footprint) {
1673             &lea        ($acc,&DWP(-2,$acc,$acc));
1674             &lea        ($acc,&DWP(0,$key,$acc,8));
1675             &mov        ($__end,$acc);          # end of key schedule
1676             &set_label("loop",16);
1677                 &decstep(0,$tbl,$s0,$s3,$s2,$s1);
1678                 &decstep(1,$tbl,$s1,$s0,$s3,$s2);
1679                 &decstep(2,$tbl,$s2,$s1,$s0,$s3);
1680                 &decstep(3,$tbl,$s3,$s2,$s1,$s0);
1681                 &add    ($key,16);              # advance rd_key
1682                 &xor    ($s0,&DWP(0,$key));
1683                 &xor    ($s1,&DWP(4,$key));
1684                 &xor    ($s2,&DWP(8,$key));
1685                 &xor    ($s3,&DWP(12,$key));
1686             &cmp        ($key,$__end);
1687             &mov        ($__key,$key);
1688             &jb         (&label("loop"));
1689         }
1690         else {
1691             &cmp        ($acc,10);
1692             &jle        (&label("10rounds"));
1693             &cmp        ($acc,12);
1694             &jle        (&label("12rounds"));
1695
1696         &set_label("14rounds",4);
1697             for ($i=1;$i<3;$i++) {
1698                 &decstep(0,$tbl,$s0,$s3,$s2,$s1);
1699                 &decstep(1,$tbl,$s1,$s0,$s3,$s2);
1700                 &decstep(2,$tbl,$s2,$s1,$s0,$s3);
1701                 &decstep(3,$tbl,$s3,$s2,$s1,$s0);
1702                 &xor    ($s0,&DWP(16*$i+0,$key));
1703                 &xor    ($s1,&DWP(16*$i+4,$key));
1704                 &xor    ($s2,&DWP(16*$i+8,$key));
1705                 &xor    ($s3,&DWP(16*$i+12,$key));
1706             }
1707             &add        ($key,32);
1708             &mov        ($__key,$key);          # advance rd_key
1709         &set_label("12rounds",4);
1710             for ($i=1;$i<3;$i++) {
1711                 &decstep(0,$tbl,$s0,$s3,$s2,$s1);
1712                 &decstep(1,$tbl,$s1,$s0,$s3,$s2);
1713                 &decstep(2,$tbl,$s2,$s1,$s0,$s3);
1714                 &decstep(3,$tbl,$s3,$s2,$s1,$s0);
1715                 &xor    ($s0,&DWP(16*$i+0,$key));
1716                 &xor    ($s1,&DWP(16*$i+4,$key));
1717                 &xor    ($s2,&DWP(16*$i+8,$key));
1718                 &xor    ($s3,&DWP(16*$i+12,$key));
1719             }
1720             &add        ($key,32);
1721             &mov        ($__key,$key);          # advance rd_key
1722         &set_label("10rounds",4);
1723             for ($i=1;$i<10;$i++) {
1724                 &decstep(0,$tbl,$s0,$s3,$s2,$s1);
1725                 &decstep(1,$tbl,$s1,$s0,$s3,$s2);
1726                 &decstep(2,$tbl,$s2,$s1,$s0,$s3);
1727                 &decstep(3,$tbl,$s3,$s2,$s1,$s0);
1728                 &xor    ($s0,&DWP(16*$i+0,$key));
1729                 &xor    ($s1,&DWP(16*$i+4,$key));
1730                 &xor    ($s2,&DWP(16*$i+8,$key));
1731                 &xor    ($s3,&DWP(16*$i+12,$key));
1732             }
1733         }
1734
1735         &declast(0,$tbl,$s0,$s3,$s2,$s1);
1736         &declast(1,$tbl,$s1,$s0,$s3,$s2);
1737         &declast(2,$tbl,$s2,$s1,$s0,$s3);
1738         &declast(3,$tbl,$s3,$s2,$s1,$s0);
1739
1740         &add    ($key,$small_footprint?16:160);
1741         &xor    ($s0,&DWP(0,$key));
1742         &xor    ($s1,&DWP(4,$key));
1743         &xor    ($s2,&DWP(8,$key));
1744         &xor    ($s3,&DWP(12,$key));
1745
1746         &ret    ();
1747
1748 &set_label("AES_Td",64);        # Yes! I keep it in the code segment!
1749         &_data_word(0x50a7f451, 0x5365417e, 0xc3a4171a, 0x965e273a);
1750         &_data_word(0xcb6bab3b, 0xf1459d1f, 0xab58faac, 0x9303e34b);
1751         &_data_word(0x55fa3020, 0xf66d76ad, 0x9176cc88, 0x254c02f5);
1752         &_data_word(0xfcd7e54f, 0xd7cb2ac5, 0x80443526, 0x8fa362b5);
1753         &_data_word(0x495ab1de, 0x671bba25, 0x980eea45, 0xe1c0fe5d);
1754         &_data_word(0x02752fc3, 0x12f04c81, 0xa397468d, 0xc6f9d36b);
1755         &_data_word(0xe75f8f03, 0x959c9215, 0xeb7a6dbf, 0xda595295);
1756         &_data_word(0x2d83bed4, 0xd3217458, 0x2969e049, 0x44c8c98e);
1757         &_data_word(0x6a89c275, 0x78798ef4, 0x6b3e5899, 0xdd71b927);
1758         &_data_word(0xb64fe1be, 0x17ad88f0, 0x66ac20c9, 0xb43ace7d);
1759         &_data_word(0x184adf63, 0x82311ae5, 0x60335197, 0x457f5362);
1760         &_data_word(0xe07764b1, 0x84ae6bbb, 0x1ca081fe, 0x942b08f9);
1761         &_data_word(0x58684870, 0x19fd458f, 0x876cde94, 0xb7f87b52);
1762         &_data_word(0x23d373ab, 0xe2024b72, 0x578f1fe3, 0x2aab5566);
1763         &_data_word(0x0728ebb2, 0x03c2b52f, 0x9a7bc586, 0xa50837d3);
1764         &_data_word(0xf2872830, 0xb2a5bf23, 0xba6a0302, 0x5c8216ed);
1765         &_data_word(0x2b1ccf8a, 0x92b479a7, 0xf0f207f3, 0xa1e2694e);
1766         &_data_word(0xcdf4da65, 0xd5be0506, 0x1f6234d1, 0x8afea6c4);
1767         &_data_word(0x9d532e34, 0xa055f3a2, 0x32e18a05, 0x75ebf6a4);
1768         &_data_word(0x39ec830b, 0xaaef6040, 0x069f715e, 0x51106ebd);
1769         &_data_word(0xf98a213e, 0x3d06dd96, 0xae053edd, 0x46bde64d);
1770         &_data_word(0xb58d5491, 0x055dc471, 0x6fd40604, 0xff155060);
1771         &_data_word(0x24fb9819, 0x97e9bdd6, 0xcc434089, 0x779ed967);
1772         &_data_word(0xbd42e8b0, 0x888b8907, 0x385b19e7, 0xdbeec879);
1773         &_data_word(0x470a7ca1, 0xe90f427c, 0xc91e84f8, 0x00000000);
1774         &_data_word(0x83868009, 0x48ed2b32, 0xac70111e, 0x4e725a6c);
1775         &_data_word(0xfbff0efd, 0x5638850f, 0x1ed5ae3d, 0x27392d36);
1776         &_data_word(0x64d90f0a, 0x21a65c68, 0xd1545b9b, 0x3a2e3624);
1777         &_data_word(0xb1670a0c, 0x0fe75793, 0xd296eeb4, 0x9e919b1b);
1778         &_data_word(0x4fc5c080, 0xa220dc61, 0x694b775a, 0x161a121c);
1779         &_data_word(0x0aba93e2, 0xe52aa0c0, 0x43e0223c, 0x1d171b12);
1780         &_data_word(0x0b0d090e, 0xadc78bf2, 0xb9a8b62d, 0xc8a91e14);
1781         &_data_word(0x8519f157, 0x4c0775af, 0xbbdd99ee, 0xfd607fa3);
1782         &_data_word(0x9f2601f7, 0xbcf5725c, 0xc53b6644, 0x347efb5b);
1783         &_data_word(0x7629438b, 0xdcc623cb, 0x68fcedb6, 0x63f1e4b8);
1784         &_data_word(0xcadc31d7, 0x10856342, 0x40229713, 0x2011c684);
1785         &_data_word(0x7d244a85, 0xf83dbbd2, 0x1132f9ae, 0x6da129c7);
1786         &_data_word(0x4b2f9e1d, 0xf330b2dc, 0xec52860d, 0xd0e3c177);
1787         &_data_word(0x6c16b32b, 0x99b970a9, 0xfa489411, 0x2264e947);
1788         &_data_word(0xc48cfca8, 0x1a3ff0a0, 0xd82c7d56, 0xef903322);
1789         &_data_word(0xc74e4987, 0xc1d138d9, 0xfea2ca8c, 0x360bd498);
1790         &_data_word(0xcf81f5a6, 0x28de7aa5, 0x268eb7da, 0xa4bfad3f);
1791         &_data_word(0xe49d3a2c, 0x0d927850, 0x9bcc5f6a, 0x62467e54);
1792         &_data_word(0xc2138df6, 0xe8b8d890, 0x5ef7392e, 0xf5afc382);
1793         &_data_word(0xbe805d9f, 0x7c93d069, 0xa92dd56f, 0xb31225cf);
1794         &_data_word(0x3b99acc8, 0xa77d1810, 0x6e639ce8, 0x7bbb3bdb);
1795         &_data_word(0x097826cd, 0xf418596e, 0x01b79aec, 0xa89a4f83);
1796         &_data_word(0x656e95e6, 0x7ee6ffaa, 0x08cfbc21, 0xe6e815ef);
1797         &_data_word(0xd99be7ba, 0xce366f4a, 0xd4099fea, 0xd67cb029);
1798         &_data_word(0xafb2a431, 0x31233f2a, 0x3094a5c6, 0xc066a235);
1799         &_data_word(0x37bc4e74, 0xa6ca82fc, 0xb0d090e0, 0x15d8a733);
1800         &_data_word(0x4a9804f1, 0xf7daec41, 0x0e50cd7f, 0x2ff69117);
1801         &_data_word(0x8dd64d76, 0x4db0ef43, 0x544daacc, 0xdf0496e4);
1802         &_data_word(0xe3b5d19e, 0x1b886a4c, 0xb81f2cc1, 0x7f516546);
1803         &_data_word(0x04ea5e9d, 0x5d358c01, 0x737487fa, 0x2e410bfb);
1804         &_data_word(0x5a1d67b3, 0x52d2db92, 0x335610e9, 0x1347d66d);
1805         &_data_word(0x8c61d79a, 0x7a0ca137, 0x8e14f859, 0x893c13eb);
1806         &_data_word(0xee27a9ce, 0x35c961b7, 0xede51ce1, 0x3cb1477a);
1807         &_data_word(0x59dfd29c, 0x3f73f255, 0x79ce1418, 0xbf37c773);
1808         &_data_word(0xeacdf753, 0x5baafd5f, 0x146f3ddf, 0x86db4478);
1809         &_data_word(0x81f3afca, 0x3ec468b9, 0x2c342438, 0x5f40a3c2);
1810         &_data_word(0x72c31d16, 0x0c25e2bc, 0x8b493c28, 0x41950dff);
1811         &_data_word(0x7101a839, 0xdeb30c08, 0x9ce4b4d8, 0x90c15664);
1812         &_data_word(0x6184cb7b, 0x70b632d5, 0x745c6c48, 0x4257b8d0);
1813
1814 #Td4:   # four copies of Td4 to choose from to avoid L1 aliasing
1815         &data_byte(0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38);
1816         &data_byte(0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb);
1817         &data_byte(0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87);
1818         &data_byte(0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb);
1819         &data_byte(0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d);
1820         &data_byte(0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e);
1821         &data_byte(0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2);
1822         &data_byte(0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25);
1823         &data_byte(0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16);
1824         &data_byte(0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92);
1825         &data_byte(0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda);
1826         &data_byte(0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84);
1827         &data_byte(0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a);
1828         &data_byte(0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06);
1829         &data_byte(0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02);
1830         &data_byte(0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b);
1831         &data_byte(0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea);
1832         &data_byte(0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73);
1833         &data_byte(0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85);
1834         &data_byte(0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e);
1835         &data_byte(0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89);
1836         &data_byte(0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b);
1837         &data_byte(0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20);
1838         &data_byte(0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4);
1839         &data_byte(0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31);
1840         &data_byte(0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f);
1841         &data_byte(0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d);
1842         &data_byte(0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef);
1843         &data_byte(0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0);
1844         &data_byte(0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61);
1845         &data_byte(0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26);
1846         &data_byte(0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d);
1847
1848         &data_byte(0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38);
1849         &data_byte(0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb);
1850         &data_byte(0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87);
1851         &data_byte(0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb);
1852         &data_byte(0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d);
1853         &data_byte(0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e);
1854         &data_byte(0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2);
1855         &data_byte(0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25);
1856         &data_byte(0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16);
1857         &data_byte(0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92);
1858         &data_byte(0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda);
1859         &data_byte(0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84);
1860         &data_byte(0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a);
1861         &data_byte(0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06);
1862         &data_byte(0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02);
1863         &data_byte(0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b);
1864         &data_byte(0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea);
1865         &data_byte(0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73);
1866         &data_byte(0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85);
1867         &data_byte(0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e);
1868         &data_byte(0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89);
1869         &data_byte(0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b);
1870         &data_byte(0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20);
1871         &data_byte(0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4);
1872         &data_byte(0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31);
1873         &data_byte(0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f);
1874         &data_byte(0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d);
1875         &data_byte(0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef);
1876         &data_byte(0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0);
1877         &data_byte(0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61);
1878         &data_byte(0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26);
1879         &data_byte(0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d);
1880
1881         &data_byte(0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38);
1882         &data_byte(0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb);
1883         &data_byte(0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87);
1884         &data_byte(0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb);
1885         &data_byte(0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d);
1886         &data_byte(0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e);
1887         &data_byte(0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2);
1888         &data_byte(0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25);
1889         &data_byte(0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16);
1890         &data_byte(0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92);
1891         &data_byte(0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda);
1892         &data_byte(0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84);
1893         &data_byte(0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a);
1894         &data_byte(0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06);
1895         &data_byte(0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02);
1896         &data_byte(0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b);
1897         &data_byte(0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea);
1898         &data_byte(0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73);
1899         &data_byte(0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85);
1900         &data_byte(0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e);
1901         &data_byte(0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89);
1902         &data_byte(0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b);
1903         &data_byte(0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20);
1904         &data_byte(0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4);
1905         &data_byte(0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31);
1906         &data_byte(0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f);
1907         &data_byte(0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d);
1908         &data_byte(0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef);
1909         &data_byte(0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0);
1910         &data_byte(0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61);
1911         &data_byte(0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26);
1912         &data_byte(0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d);
1913
1914         &data_byte(0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38);
1915         &data_byte(0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb);
1916         &data_byte(0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87);
1917         &data_byte(0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb);
1918         &data_byte(0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d);
1919         &data_byte(0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e);
1920         &data_byte(0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2);
1921         &data_byte(0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25);
1922         &data_byte(0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16);
1923         &data_byte(0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92);
1924         &data_byte(0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda);
1925         &data_byte(0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84);
1926         &data_byte(0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a);
1927         &data_byte(0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06);
1928         &data_byte(0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02);
1929         &data_byte(0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b);
1930         &data_byte(0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea);
1931         &data_byte(0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73);
1932         &data_byte(0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85);
1933         &data_byte(0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e);
1934         &data_byte(0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89);
1935         &data_byte(0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b);
1936         &data_byte(0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20);
1937         &data_byte(0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4);
1938         &data_byte(0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31);
1939         &data_byte(0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f);
1940         &data_byte(0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d);
1941         &data_byte(0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef);
1942         &data_byte(0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0);
1943         &data_byte(0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61);
1944         &data_byte(0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26);
1945         &data_byte(0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d);
1946 &function_end_B("_x86_AES_decrypt");
1947
1948 # void AES_decrypt (const void *inp,void *out,const AES_KEY *key);
1949 &function_begin("AES_decrypt");
1950         &mov    ($acc,&wparam(0));              # load inp
1951         &mov    ($key,&wparam(2));              # load key
1952
1953         &mov    ($s0,"esp");
1954         &sub    ("esp",36);
1955         &and    ("esp",-64);                    # align to cache-line
1956
1957         # place stack frame just "above" the key schedule
1958         &lea    ($s1,&DWP(-64-63,$key));
1959         &sub    ($s1,"esp");
1960         &neg    ($s1);
1961         &and    ($s1,0x3C0);    # modulo 1024, but aligned to cache-line
1962         &sub    ("esp",$s1);
1963         &add    ("esp",4);      # 4 is reserved for caller's return address
1964         &mov    ($_esp,$s0);    # save stack pointer
1965
1966         &call   (&label("pic_point"));          # make it PIC!
1967         &set_label("pic_point");
1968         &blindpop($tbl);
1969         &picmeup($s0,"OPENSSL_ia32cap_P",$tbl,&label("pic_point")) if(!$x86only);
1970         &lea    ($tbl,&DWP(&label("AES_Td")."-".&label("pic_point"),$tbl));
1971
1972         # pick Td4 copy which can't "overlap" with stack frame or key schedule
1973         &lea    ($s1,&DWP(768-4,"esp"));
1974         &sub    ($s1,$tbl);
1975         &and    ($s1,0x300);
1976         &lea    ($tbl,&DWP(2048+128,$tbl,$s1));
1977
1978                                         if (!$x86only) {
1979         &bt     (&DWP(0,$s0),25);       # check for SSE bit
1980         &jnc    (&label("x86"));
1981
1982         &movq   ("mm0",&QWP(0,$acc));
1983         &movq   ("mm4",&QWP(8,$acc));
1984         &call   ("_sse_AES_decrypt_compact");
1985         &mov    ("esp",$_esp);                  # restore stack pointer
1986         &mov    ($acc,&wparam(1));              # load out
1987         &movq   (&QWP(0,$acc),"mm0");           # write output data
1988         &movq   (&QWP(8,$acc),"mm4");
1989         &emms   ();
1990         &function_end_A();
1991                                         }
1992         &set_label("x86",16);
1993         &mov    ($_tbl,$tbl);
1994         &mov    ($s0,&DWP(0,$acc));             # load input data
1995         &mov    ($s1,&DWP(4,$acc));
1996         &mov    ($s2,&DWP(8,$acc));
1997         &mov    ($s3,&DWP(12,$acc));
1998         &call   ("_x86_AES_decrypt_compact");
1999         &mov    ("esp",$_esp);                  # restore stack pointer
2000         &mov    ($acc,&wparam(1));              # load out
2001         &mov    (&DWP(0,$acc),$s0);             # write output data
2002         &mov    (&DWP(4,$acc),$s1);
2003         &mov    (&DWP(8,$acc),$s2);
2004         &mov    (&DWP(12,$acc),$s3);
2005 &function_end("AES_decrypt");
2006
2007 # void AES_cbc_encrypt (const void char *inp, unsigned char *out,
2008 #                       size_t length, const AES_KEY *key,
2009 #                       unsigned char *ivp,const int enc);
2010 {
2011 # stack frame layout
2012 #             -4(%esp)          # return address         0(%esp)
2013 #              0(%esp)          # s0 backing store       4(%esp)        
2014 #              4(%esp)          # s1 backing store       8(%esp)
2015 #              8(%esp)          # s2 backing store      12(%esp)
2016 #             12(%esp)          # s3 backing store      16(%esp)
2017 #             16(%esp)          # key backup            20(%esp)
2018 #             20(%esp)          # end of key schedule   24(%esp)
2019 #             24(%esp)          # %ebp backup           28(%esp)
2020 #             28(%esp)          # %esp backup
2021 my $_inp=&DWP(32,"esp");        # copy of wparam(0)
2022 my $_out=&DWP(36,"esp");        # copy of wparam(1)
2023 my $_len=&DWP(40,"esp");        # copy of wparam(2)
2024 my $_key=&DWP(44,"esp");        # copy of wparam(3)
2025 my $_ivp=&DWP(48,"esp");        # copy of wparam(4)
2026 my $_tmp=&DWP(52,"esp");        # volatile variable
2027 #
2028 my $ivec=&DWP(60,"esp");        # ivec[16]
2029 my $aes_key=&DWP(76,"esp");     # copy of aes_key
2030 my $mark=&DWP(76+240,"esp");    # copy of aes_key->rounds
2031
2032 &function_begin("AES_cbc_encrypt");
2033         &mov    ($s2 eq "ecx"? $s2 : "",&wparam(2));    # load len
2034         &cmp    ($s2,0);
2035         &je     (&label("drop_out"));
2036
2037         &call   (&label("pic_point"));          # make it PIC!
2038         &set_label("pic_point");
2039         &blindpop($tbl);
2040         &picmeup($s0,"OPENSSL_ia32cap_P",$tbl,&label("pic_point")) if(!$x86only);
2041
2042         &cmp    (&wparam(5),0);
2043         &lea    ($tbl,&DWP(&label("AES_Te")."-".&label("pic_point"),$tbl));
2044         &jne    (&label("picked_te"));
2045         &lea    ($tbl,&DWP(&label("AES_Td")."-".&label("AES_Te"),$tbl));
2046         &set_label("picked_te");
2047
2048         # one can argue if this is required
2049         &pushf  ();
2050         &cld    ();
2051
2052         &cmp    ($s2,$speed_limit);
2053         &jb     (&label("slow_way"));
2054         &test   ($s2,15);
2055         &jnz    (&label("slow_way"));
2056                                         if (!$x86only) {
2057         &bt     (&DWP(0,$s0),28);       # check for hyper-threading bit
2058         &jc     (&label("slow_way"));
2059                                         }
2060         # pre-allocate aligned stack frame...
2061         &lea    ($acc,&DWP(-80-244,"esp"));
2062         &and    ($acc,-64);
2063
2064         # ... and make sure it doesn't alias with $tbl modulo 4096
2065         &mov    ($s0,$tbl);
2066         &lea    ($s1,&DWP(2048+256,$tbl));
2067         &mov    ($s3,$acc);
2068         &and    ($s0,0xfff);            # s = %ebp&0xfff
2069         &and    ($s1,0xfff);            # e = (%ebp+2048+256)&0xfff
2070         &and    ($s3,0xfff);            # p = %esp&0xfff
2071
2072         &cmp    ($s3,$s1);              # if (p>=e) %esp =- (p-e);
2073         &jb     (&label("tbl_break_out"));
2074         &sub    ($s3,$s1);
2075         &sub    ($acc,$s3);
2076         &jmp    (&label("tbl_ok"));
2077         &set_label("tbl_break_out",4);  # else %esp -= (p-s)&0xfff + framesz;
2078         &sub    ($s3,$s0);
2079         &and    ($s3,0xfff);
2080         &add    ($s3,384);
2081         &sub    ($acc,$s3);
2082         &set_label("tbl_ok",4);
2083
2084         &lea    ($s3,&wparam(0));       # obtain pointer to parameter block
2085         &exch   ("esp",$acc);           # allocate stack frame
2086         &add    ("esp",4);              # reserve for return address!
2087         &mov    ($_tbl,$tbl);           # save %ebp
2088         &mov    ($_esp,$acc);           # save %esp
2089
2090         &mov    ($s0,&DWP(0,$s3));      # load inp
2091         &mov    ($s1,&DWP(4,$s3));      # load out
2092         #&mov   ($s2,&DWP(8,$s3));      # load len
2093         &mov    ($key,&DWP(12,$s3));    # load key
2094         &mov    ($acc,&DWP(16,$s3));    # load ivp
2095         &mov    ($s3,&DWP(20,$s3));     # load enc flag
2096
2097         &mov    ($_inp,$s0);            # save copy of inp
2098         &mov    ($_out,$s1);            # save copy of out
2099         &mov    ($_len,$s2);            # save copy of len
2100         &mov    ($_key,$key);           # save copy of key
2101         &mov    ($_ivp,$acc);           # save copy of ivp
2102
2103         &mov    ($mark,0);              # copy of aes_key->rounds = 0;
2104         # do we copy key schedule to stack?
2105         &mov    ($s1 eq "ebx" ? $s1 : "",$key);
2106         &mov    ($s2 eq "ecx" ? $s2 : "",244/4);
2107         &sub    ($s1,$tbl);
2108         &mov    ("esi",$key);
2109         &and    ($s1,0xfff);
2110         &lea    ("edi",$aes_key);
2111         &cmp    ($s1,2048+256);
2112         &jb     (&label("do_copy"));
2113         &cmp    ($s1,4096-244);
2114         &jb     (&label("skip_copy"));
2115         &set_label("do_copy",4);
2116                 &mov    ($_key,"edi");
2117                 &data_word(0xA5F3F689); # rep movsd
2118         &set_label("skip_copy");
2119
2120         &mov    ($key,16);
2121         &set_label("prefetch_tbl",4);
2122                 &mov    ($s0,&DWP(0,$tbl));
2123                 &mov    ($s1,&DWP(32,$tbl));
2124                 &mov    ($s2,&DWP(64,$tbl));
2125                 &mov    ($acc,&DWP(96,$tbl));
2126                 &lea    ($tbl,&DWP(128,$tbl));
2127                 &sub    ($key,1);
2128         &jnz    (&label("prefetch_tbl"));
2129         &sub    ($tbl,2048);
2130
2131         &mov    ($acc,$_inp);
2132         &mov    ($key,$_ivp);
2133
2134         &cmp    ($s3,0);
2135         &je     (&label("fast_decrypt"));
2136
2137 #----------------------------- ENCRYPT -----------------------------#
2138         &mov    ($s0,&DWP(0,$key));             # load iv
2139         &mov    ($s1,&DWP(4,$key));
2140
2141         &set_label("fast_enc_loop",16);
2142                 &mov    ($s2,&DWP(8,$key));
2143                 &mov    ($s3,&DWP(12,$key));
2144
2145                 &xor    ($s0,&DWP(0,$acc));     # xor input data
2146                 &xor    ($s1,&DWP(4,$acc));
2147                 &xor    ($s2,&DWP(8,$acc));
2148                 &xor    ($s3,&DWP(12,$acc));
2149
2150                 &mov    ($key,$_key);           # load key
2151                 &call   ("_x86_AES_encrypt");
2152
2153                 &mov    ($acc,$_inp);           # load inp
2154                 &mov    ($key,$_out);           # load out
2155
2156                 &mov    (&DWP(0,$key),$s0);     # save output data
2157                 &mov    (&DWP(4,$key),$s1);
2158                 &mov    (&DWP(8,$key),$s2);
2159                 &mov    (&DWP(12,$key),$s3);
2160
2161                 &lea    ($acc,&DWP(16,$acc));   # advance inp
2162                 &mov    ($s2,$_len);            # load len
2163                 &mov    ($_inp,$acc);           # save inp
2164                 &lea    ($s3,&DWP(16,$key));    # advance out
2165                 &mov    ($_out,$s3);            # save out
2166                 &sub    ($s2,16);               # decrease len
2167                 &mov    ($_len,$s2);            # save len
2168         &jnz    (&label("fast_enc_loop"));
2169         &mov    ($acc,$_ivp);           # load ivp
2170         &mov    ($s2,&DWP(8,$key));     # restore last 2 dwords
2171         &mov    ($s3,&DWP(12,$key));
2172         &mov    (&DWP(0,$acc),$s0);     # save ivec
2173         &mov    (&DWP(4,$acc),$s1);
2174         &mov    (&DWP(8,$acc),$s2);
2175         &mov    (&DWP(12,$acc),$s3);
2176
2177         &cmp    ($mark,0);              # was the key schedule copied?
2178         &mov    ("edi",$_key);
2179         &je     (&label("skip_ezero"));
2180         # zero copy of key schedule
2181         &mov    ("ecx",240/4);
2182         &xor    ("eax","eax");
2183         &align  (4);
2184         &data_word(0xABF3F689); # rep stosd
2185         &set_label("skip_ezero")
2186         &mov    ("esp",$_esp);
2187         &popf   ();
2188     &set_label("drop_out");
2189         &function_end_A();
2190         &pushf  ();                     # kludge, never executed
2191
2192 #----------------------------- DECRYPT -----------------------------#
2193 &set_label("fast_decrypt",16);
2194
2195         &cmp    ($acc,$_out);
2196         &je     (&label("fast_dec_in_place"));  # in-place processing...
2197
2198         &mov    ($_tmp,$key);
2199
2200         &align  (4);
2201         &set_label("fast_dec_loop",16);
2202                 &mov    ($s0,&DWP(0,$acc));     # read input
2203                 &mov    ($s1,&DWP(4,$acc));
2204                 &mov    ($s2,&DWP(8,$acc));
2205                 &mov    ($s3,&DWP(12,$acc));
2206
2207                 &mov    ($key,$_key);           # load key
2208                 &call   ("_x86_AES_decrypt");
2209
2210                 &mov    ($key,$_tmp);           # load ivp
2211                 &mov    ($acc,$_len);           # load len
2212                 &xor    ($s0,&DWP(0,$key));     # xor iv
2213                 &xor    ($s1,&DWP(4,$key));
2214                 &xor    ($s2,&DWP(8,$key));
2215                 &xor    ($s3,&DWP(12,$key));
2216
2217                 &mov    ($key,$_out);           # load out
2218                 &mov    ($acc,$_inp);           # load inp
2219
2220                 &mov    (&DWP(0,$key),$s0);     # write output
2221                 &mov    (&DWP(4,$key),$s1);
2222                 &mov    (&DWP(8,$key),$s2);
2223                 &mov    (&DWP(12,$key),$s3);
2224
2225                 &mov    ($s2,$_len);            # load len
2226                 &mov    ($_tmp,$acc);           # save ivp
2227                 &lea    ($acc,&DWP(16,$acc));   # advance inp
2228                 &mov    ($_inp,$acc);           # save inp
2229                 &lea    ($key,&DWP(16,$key));   # advance out
2230                 &mov    ($_out,$key);           # save out
2231                 &sub    ($s2,16);               # decrease len
2232                 &mov    ($_len,$s2);            # save len
2233         &jnz    (&label("fast_dec_loop"));
2234         &mov    ($key,$_tmp);           # load temp ivp
2235         &mov    ($acc,$_ivp);           # load user ivp
2236         &mov    ($s0,&DWP(0,$key));     # load iv
2237         &mov    ($s1,&DWP(4,$key));
2238         &mov    ($s2,&DWP(8,$key));
2239         &mov    ($s3,&DWP(12,$key));
2240         &mov    (&DWP(0,$acc),$s0);     # copy back to user
2241         &mov    (&DWP(4,$acc),$s1);
2242         &mov    (&DWP(8,$acc),$s2);
2243         &mov    (&DWP(12,$acc),$s3);
2244         &jmp    (&label("fast_dec_out"));
2245
2246     &set_label("fast_dec_in_place",16);
2247         &set_label("fast_dec_in_place_loop");
2248                 &mov    ($s0,&DWP(0,$acc));     # read input
2249                 &mov    ($s1,&DWP(4,$acc));
2250                 &mov    ($s2,&DWP(8,$acc));
2251                 &mov    ($s3,&DWP(12,$acc));
2252
2253                 &lea    ($key,$ivec);
2254                 &mov    (&DWP(0,$key),$s0);     # copy to temp
2255                 &mov    (&DWP(4,$key),$s1);
2256                 &mov    (&DWP(8,$key),$s2);
2257                 &mov    (&DWP(12,$key),$s3);
2258
2259                 &mov    ($key,$_key);           # load key
2260                 &call   ("_x86_AES_decrypt");
2261
2262                 &mov    ($key,$_ivp);           # load ivp
2263                 &mov    ($acc,$_out);           # load out
2264                 &xor    ($s0,&DWP(0,$key));     # xor iv
2265                 &xor    ($s1,&DWP(4,$key));
2266                 &xor    ($s2,&DWP(8,$key));
2267                 &xor    ($s3,&DWP(12,$key));
2268
2269                 &mov    (&DWP(0,$acc),$s0);     # write output
2270                 &mov    (&DWP(4,$acc),$s1);
2271                 &mov    (&DWP(8,$acc),$s2);
2272                 &mov    (&DWP(12,$acc),$s3);
2273
2274                 &lea    ($acc,&DWP(16,$acc));   # advance out
2275                 &mov    ($_out,$acc);           # save out
2276
2277                 &lea    ($acc,$ivec);
2278                 &mov    ($s0,&DWP(0,$acc));     # read temp
2279                 &mov    ($s1,&DWP(4,$acc));
2280                 &mov    ($s2,&DWP(8,$acc));
2281                 &mov    ($s3,&DWP(12,$acc));
2282
2283                 &mov    (&DWP(0,$key),$s0);     # copy iv
2284                 &mov    (&DWP(4,$key),$s1);
2285                 &mov    (&DWP(8,$key),$s2);
2286                 &mov    (&DWP(12,$key),$s3);
2287
2288                 &mov    ($acc,$_inp);           # load inp
2289                 &mov    ($s2,$_len);            # load len
2290                 &lea    ($acc,&DWP(16,$acc));   # advance inp
2291                 &mov    ($_inp,$acc);           # save inp
2292                 &sub    ($s2,16);               # decrease len
2293                 &mov    ($_len,$s2);            # save len
2294         &jnz    (&label("fast_dec_in_place_loop"));
2295
2296     &set_label("fast_dec_out",4);
2297         &cmp    ($mark,0);              # was the key schedule copied?
2298         &mov    ("edi",$_key);
2299         &je     (&label("skip_dzero"));
2300         # zero copy of key schedule
2301         &mov    ("ecx",240/4);
2302         &xor    ("eax","eax");
2303         &align  (4);
2304         &data_word(0xABF3F689); # rep stosd
2305         &set_label("skip_dzero")
2306         &mov    ("esp",$_esp);
2307         &popf   ();
2308         &function_end_A();
2309         &pushf  ();                     # kludge, never executed
2310
2311 #--------------------------- SLOW ROUTINE ---------------------------#
2312 &set_label("slow_way",16);
2313
2314         &mov    ($s0,&DWP(0,$s0)) if (!$x86only);# load OPENSSL_ia32cap
2315         &mov    ($key,&wparam(3));      # load key
2316
2317         # pre-allocate aligned stack frame...
2318         &lea    ($acc,&DWP(-80,"esp"));
2319         &and    ($acc,-64);
2320
2321         # ... and make sure it doesn't alias with $key modulo 1024
2322         &lea    ($s1,&DWP(-80-63,$key));
2323         &sub    ($s1,$acc);
2324         &neg    ($s1);
2325         &and    ($s1,0x3C0);    # modulo 1024, but aligned to cache-line
2326         &sub    ($acc,$s1);
2327
2328         # pick S-box copy which can't overlap with stack frame or $key
2329         &lea    ($s1,&DWP(768,$acc));
2330         &sub    ($s1,$tbl);
2331         &and    ($s1,0x300);
2332         &lea    ($tbl,&DWP(2048+128,$tbl,$s1));
2333
2334         &lea    ($s3,&wparam(0));       # pointer to parameter block
2335
2336         &exch   ("esp",$acc);
2337         &add    ("esp",4);              # reserve for return address!
2338         &mov    ($_tbl,$tbl);           # save %ebp
2339         &mov    ($_esp,$acc);           # save %esp
2340         &mov    ($_tmp,$s0);            # save OPENSSL_ia32cap
2341
2342         &mov    ($s0,&DWP(0,$s3));      # load inp
2343         &mov    ($s1,&DWP(4,$s3));      # load out
2344         #&mov   ($s2,&DWP(8,$s3));      # load len
2345         #&mov   ($key,&DWP(12,$s3));    # load key
2346         &mov    ($acc,&DWP(16,$s3));    # load ivp
2347         &mov    ($s3,&DWP(20,$s3));     # load enc flag
2348
2349         &mov    ($_inp,$s0);            # save copy of inp
2350         &mov    ($_out,$s1);            # save copy of out
2351         &mov    ($_len,$s2);            # save copy of len
2352         &mov    ($_key,$key);           # save copy of key
2353         &mov    ($_ivp,$acc);           # save copy of ivp
2354
2355         &mov    ($key,$acc);
2356         &mov    ($acc,$s0);
2357
2358         &cmp    ($s3,0);
2359         &je     (&label("slow_decrypt"));
2360
2361 #--------------------------- SLOW ENCRYPT ---------------------------#
2362         &cmp    ($s2,16);
2363         &mov    ($s3,$s1);
2364         &jb     (&label("slow_enc_tail"));
2365
2366                                         if (!$x86only) {
2367         &bt     ($_tmp,25);             # check for SSE bit
2368         &jnc    (&label("slow_enc_x86"));
2369
2370         &movq   ("mm0",&QWP(0,$key));   # load iv
2371         &movq   ("mm4",&QWP(8,$key));
2372
2373         &set_label("slow_enc_loop_sse",16);
2374                 &pxor   ("mm0",&QWP(0,$acc));   # xor input data
2375                 &pxor   ("mm4",&QWP(8,$acc));
2376
2377                 &mov    ($key,$_key);
2378                 &call   ("_sse_AES_encrypt_compact");
2379
2380                 &mov    ($acc,$_inp);           # load inp
2381                 &mov    ($key,$_out);           # load out
2382                 &mov    ($s2,$_len);            # load len
2383
2384                 &movq   (&QWP(0,$key),"mm0");   # save output data
2385                 &movq   (&QWP(8,$key),"mm4");
2386
2387                 &lea    ($acc,&DWP(16,$acc));   # advance inp
2388                 &mov    ($_inp,$acc);           # save inp
2389                 &lea    ($s3,&DWP(16,$key));    # advance out
2390                 &mov    ($_out,$s3);            # save out
2391                 &sub    ($s2,16);               # decrease len
2392                 &cmp    ($s2,16);
2393                 &mov    ($_len,$s2);            # save len
2394         &jae    (&label("slow_enc_loop_sse"));
2395         &test   ($s2,15);
2396         &jnz    (&label("slow_enc_tail"));
2397         &mov    ($acc,$_ivp);           # load ivp
2398         &movq   (&QWP(0,$acc),"mm0");   # save ivec
2399         &movq   (&QWP(8,$acc),"mm4");
2400         &emms   ();
2401         &mov    ("esp",$_esp);
2402         &popf   ();
2403         &function_end_A();
2404         &pushf  ();                     # kludge, never executed
2405                                         }
2406     &set_label("slow_enc_x86",16);
2407         &mov    ($s0,&DWP(0,$key));     # load iv
2408         &mov    ($s1,&DWP(4,$key));
2409
2410         &set_label("slow_enc_loop_x86",4);
2411                 &mov    ($s2,&DWP(8,$key));
2412                 &mov    ($s3,&DWP(12,$key));
2413
2414                 &xor    ($s0,&DWP(0,$acc));     # xor input data
2415                 &xor    ($s1,&DWP(4,$acc));
2416                 &xor    ($s2,&DWP(8,$acc));
2417                 &xor    ($s3,&DWP(12,$acc));
2418
2419                 &mov    ($key,$_key);           # load key
2420                 &call   ("_x86_AES_encrypt_compact");
2421
2422                 &mov    ($acc,$_inp);           # load inp
2423                 &mov    ($key,$_out);           # load out
2424
2425                 &mov    (&DWP(0,$key),$s0);     # save output data
2426                 &mov    (&DWP(4,$key),$s1);
2427                 &mov    (&DWP(8,$key),$s2);
2428                 &mov    (&DWP(12,$key),$s3);
2429
2430                 &mov    ($s2,$_len);            # load len
2431                 &lea    ($acc,&DWP(16,$acc));   # advance inp
2432                 &mov    ($_inp,$acc);           # save inp
2433                 &lea    ($s3,&DWP(16,$key));    # advance out
2434                 &mov    ($_out,$s3);            # save out
2435                 &sub    ($s2,16);               # decrease len
2436                 &cmp    ($s2,16);
2437                 &mov    ($_len,$s2);            # save len
2438         &jae    (&label("slow_enc_loop_x86"));
2439         &test   ($s2,15);
2440         &jnz    (&label("slow_enc_tail"));
2441         &mov    ($acc,$_ivp);           # load ivp
2442         &mov    ($s2,&DWP(8,$key));     # restore last dwords
2443         &mov    ($s3,&DWP(12,$key));
2444         &mov    (&DWP(0,$acc),$s0);     # save ivec
2445         &mov    (&DWP(4,$acc),$s1);
2446         &mov    (&DWP(8,$acc),$s2);
2447         &mov    (&DWP(12,$acc),$s3);
2448
2449         &mov    ("esp",$_esp);
2450         &popf   ();
2451         &function_end_A();
2452         &pushf  ();                     # kludge, never executed
2453
2454     &set_label("slow_enc_tail",16);
2455         &emms   ()      if (!$x86only);
2456         &mov    ($key eq "edi"? $key:"",$s3);   # load out to edi
2457         &mov    ($s1,16);
2458         &sub    ($s1,$s2);
2459         &cmp    ($key,$acc eq "esi"? $acc:"");  # compare with inp
2460         &je     (&label("enc_in_place"));
2461         &align  (4);
2462         &data_word(0xA4F3F689); # rep movsb     # copy input
2463         &jmp    (&label("enc_skip_in_place"));
2464     &set_label("enc_in_place");
2465         &lea    ($key,&DWP(0,$key,$s2));
2466     &set_label("enc_skip_in_place");
2467         &mov    ($s2,$s1);
2468         &xor    ($s0,$s0);
2469         &align  (4);
2470         &data_word(0xAAF3F689); # rep stosb     # zero tail
2471
2472         &mov    ($key,$_ivp);                   # restore ivp
2473         &mov    ($acc,$s3);                     # output as input
2474         &mov    ($s0,&DWP(0,$key));
2475         &mov    ($s1,&DWP(4,$key));
2476         &mov    ($_len,16);                     # len=16
2477         &jmp    (&label("slow_enc_loop_x86"));  # one more spin...
2478
2479 #--------------------------- SLOW DECRYPT ---------------------------#
2480 &set_label("slow_decrypt",16);
2481                                         if (!$x86only) {
2482         &bt     ($_tmp,25);             # check for SSE bit
2483         &jnc    (&label("slow_dec_loop_x86"));
2484
2485         &set_label("slow_dec_loop_sse",4);
2486                 &movq   ("mm0",&QWP(0,$acc));   # read input
2487                 &movq   ("mm4",&QWP(8,$acc));
2488
2489                 &mov    ($key,$_key);
2490                 &call   ("_sse_AES_decrypt_compact");
2491
2492                 &mov    ($acc,$_inp);           # load inp
2493                 &lea    ($s0,$ivec);
2494                 &mov    ($s1,$_out);            # load out
2495                 &mov    ($s2,$_len);            # load len
2496                 &mov    ($key,$_ivp);           # load ivp
2497
2498                 &movq   ("mm1",&QWP(0,$acc));   # re-read input
2499                 &movq   ("mm5",&QWP(8,$acc));
2500
2501                 &pxor   ("mm0",&QWP(0,$key));   # xor iv
2502                 &pxor   ("mm4",&QWP(8,$key));
2503
2504                 &movq   (&QWP(0,$key),"mm1");   # copy input to iv
2505                 &movq   (&QWP(8,$key),"mm5");
2506
2507                 &sub    ($s2,16);               # decrease len
2508                 &jc     (&label("slow_dec_partial_sse"));
2509
2510                 &movq   (&QWP(0,$s1),"mm0");    # write output
2511                 &movq   (&QWP(8,$s1),"mm4");
2512
2513                 &lea    ($s1,&DWP(16,$s1));     # advance out
2514                 &mov    ($_out,$s1);            # save out
2515                 &lea    ($acc,&DWP(16,$acc));   # advance inp
2516                 &mov    ($_inp,$acc);           # save inp
2517                 &mov    ($_len,$s2);            # save len
2518         &jnz    (&label("slow_dec_loop_sse"));
2519         &emms   ();
2520         &mov    ("esp",$_esp);
2521         &popf   ();
2522         &function_end_A();
2523         &pushf  ();                     # kludge, never executed
2524
2525     &set_label("slow_dec_partial_sse",16);
2526         &movq   (&QWP(0,$s0),"mm0");    # save output to temp
2527         &movq   (&QWP(8,$s0),"mm4");
2528         &emms   ();
2529
2530         &add    ($s2 eq "ecx" ? "ecx":"",16);
2531         &mov    ("edi",$s1);            # out
2532         &mov    ("esi",$s0);            # temp
2533         &align  (4);
2534         &data_word(0xA4F3F689);         # rep movsb # copy partial output
2535
2536         &mov    ("esp",$_esp);
2537         &popf   ();
2538         &function_end_A();
2539         &pushf  ();                     # kludge, never executed
2540                                         }
2541         &set_label("slow_dec_loop_x86",16);
2542                 &mov    ($s0,&DWP(0,$acc));     # read input
2543                 &mov    ($s1,&DWP(4,$acc));
2544                 &mov    ($s2,&DWP(8,$acc));
2545                 &mov    ($s3,&DWP(12,$acc));
2546
2547                 &lea    ($key,$ivec);
2548                 &mov    (&DWP(0,$key),$s0);     # copy to temp
2549                 &mov    (&DWP(4,$key),$s1);
2550                 &mov    (&DWP(8,$key),$s2);
2551                 &mov    (&DWP(12,$key),$s3);
2552
2553                 &mov    ($key,$_key);           # load key
2554                 &call   ("_x86_AES_decrypt_compact");
2555
2556                 &mov    ($key,$_ivp);           # load ivp
2557                 &mov    ($acc,$_len);           # load len
2558                 &xor    ($s0,&DWP(0,$key));     # xor iv
2559                 &xor    ($s1,&DWP(4,$key));
2560                 &xor    ($s2,&DWP(8,$key));
2561                 &xor    ($s3,&DWP(12,$key));
2562
2563                 &sub    ($acc,16);
2564                 &jc     (&label("slow_dec_partial_x86"));
2565
2566                 &mov    ($_len,$acc);           # save len
2567                 &mov    ($acc,$_out);           # load out
2568
2569                 &mov    (&DWP(0,$acc),$s0);     # write output
2570                 &mov    (&DWP(4,$acc),$s1);
2571                 &mov    (&DWP(8,$acc),$s2);
2572                 &mov    (&DWP(12,$acc),$s3);
2573
2574                 &lea    ($acc,&DWP(16,$acc));   # advance out
2575                 &mov    ($_out,$acc);           # save out
2576
2577                 &lea    ($acc,$ivec);
2578                 &mov    ($s0,&DWP(0,$acc));     # read temp
2579                 &mov    ($s1,&DWP(4,$acc));
2580                 &mov    ($s2,&DWP(8,$acc));
2581                 &mov    ($s3,&DWP(12,$acc));
2582
2583                 &mov    (&DWP(0,$key),$s0);     # copy it to iv
2584                 &mov    (&DWP(4,$key),$s1);
2585                 &mov    (&DWP(8,$key),$s2);
2586                 &mov    (&DWP(12,$key),$s3);
2587
2588                 &mov    ($acc,$_inp);           # load inp
2589                 &lea    ($acc,&DWP(16,$acc));   # advance inp
2590                 &mov    ($_inp,$acc);           # save inp
2591         &jnz    (&label("slow_dec_loop_x86"));
2592         &mov    ("esp",$_esp);
2593         &popf   ();
2594         &function_end_A();
2595         &pushf  ();                     # kludge, never executed
2596
2597     &set_label("slow_dec_partial_x86",16);
2598         &lea    ($acc,$ivec);
2599         &mov    (&DWP(0,$acc),$s0);     # save output to temp
2600         &mov    (&DWP(4,$acc),$s1);
2601         &mov    (&DWP(8,$acc),$s2);
2602         &mov    (&DWP(12,$acc),$s3);
2603
2604         &mov    ($acc,$_inp);
2605         &mov    ($s0,&DWP(0,$acc));     # re-read input
2606         &mov    ($s1,&DWP(4,$acc));
2607         &mov    ($s2,&DWP(8,$acc));
2608         &mov    ($s3,&DWP(12,$acc));
2609
2610         &mov    (&DWP(0,$key),$s0);     # copy it to iv
2611         &mov    (&DWP(4,$key),$s1);
2612         &mov    (&DWP(8,$key),$s2);
2613         &mov    (&DWP(12,$key),$s3);
2614
2615         &mov    ("ecx",$_len);
2616         &mov    ("edi",$_out);
2617         &lea    ("esi",$ivec);
2618         &align  (4);
2619         &data_word(0xA4F3F689);         # rep movsb # copy partial output
2620
2621         &mov    ("esp",$_esp);
2622         &popf   ();
2623 &function_end("AES_cbc_encrypt");
2624 }
2625
2626 #------------------------------------------------------------------#
2627
2628 sub enckey()
2629 {
2630         &movz   ("esi",&LB("edx"));             # rk[i]>>0
2631         &movz   ("ebx",&BP(-128,$tbl,"esi",1));
2632         &movz   ("esi",&HB("edx"));             # rk[i]>>8
2633         &shl    ("ebx",24);
2634         &xor    ("eax","ebx");
2635
2636         &movz   ("ebx",&BP(-128,$tbl,"esi",1));
2637         &shr    ("edx",16);
2638         &movz   ("esi",&LB("edx"));             # rk[i]>>16
2639         &xor    ("eax","ebx");
2640
2641         &movz   ("ebx",&BP(-128,$tbl,"esi",1));
2642         &movz   ("esi",&HB("edx"));             # rk[i]>>24
2643         &shl    ("ebx",8);
2644         &xor    ("eax","ebx");
2645
2646         &movz   ("ebx",&BP(-128,$tbl,"esi",1));
2647         &shl    ("ebx",16);
2648         &xor    ("eax","ebx");
2649
2650         &xor    ("eax",&DWP(1024-128,$tbl,"ecx",4));    # rcon
2651 }
2652
2653 &function_begin("_x86_AES_set_encrypt_key");
2654         &mov    ("esi",&wparam(1));             # user supplied key
2655         &mov    ("edi",&wparam(3));             # private key schedule
2656
2657         &test   ("esi",-1);
2658         &jz     (&label("badpointer"));
2659         &test   ("edi",-1);
2660         &jz     (&label("badpointer"));
2661
2662         &call   (&label("pic_point"));
2663         &set_label("pic_point");
2664         &blindpop($tbl);
2665         &lea    ($tbl,&DWP(&label("AES_Te")."-".&label("pic_point"),$tbl));
2666         &lea    ($tbl,&DWP(2048+128,$tbl));
2667
2668         # prefetch Te4
2669         &mov    ("eax",&DWP(0-128,$tbl));
2670         &mov    ("ebx",&DWP(32-128,$tbl));
2671         &mov    ("ecx",&DWP(64-128,$tbl));
2672         &mov    ("edx",&DWP(96-128,$tbl));
2673         &mov    ("eax",&DWP(128-128,$tbl));
2674         &mov    ("ebx",&DWP(160-128,$tbl));
2675         &mov    ("ecx",&DWP(192-128,$tbl));
2676         &mov    ("edx",&DWP(224-128,$tbl));
2677
2678         &mov    ("ecx",&wparam(2));             # number of bits in key
2679         &cmp    ("ecx",128);
2680         &je     (&label("10rounds"));
2681         &cmp    ("ecx",192);
2682         &je     (&label("12rounds"));
2683         &cmp    ("ecx",256);
2684         &je     (&label("14rounds"));
2685         &mov    ("eax",-2);                     # invalid number of bits
2686         &jmp    (&label("exit"));
2687
2688     &set_label("10rounds");
2689         &mov    ("eax",&DWP(0,"esi"));          # copy first 4 dwords
2690         &mov    ("ebx",&DWP(4,"esi"));
2691         &mov    ("ecx",&DWP(8,"esi"));
2692         &mov    ("edx",&DWP(12,"esi"));
2693         &mov    (&DWP(0,"edi"),"eax");
2694         &mov    (&DWP(4,"edi"),"ebx");
2695         &mov    (&DWP(8,"edi"),"ecx");
2696         &mov    (&DWP(12,"edi"),"edx");
2697
2698         &xor    ("ecx","ecx");
2699         &jmp    (&label("10shortcut"));
2700
2701         &align  (4);
2702         &set_label("10loop");
2703                 &mov    ("eax",&DWP(0,"edi"));          # rk[0]
2704                 &mov    ("edx",&DWP(12,"edi"));         # rk[3]
2705         &set_label("10shortcut");
2706                 &enckey ();
2707
2708                 &mov    (&DWP(16,"edi"),"eax");         # rk[4]
2709                 &xor    ("eax",&DWP(4,"edi"));
2710                 &mov    (&DWP(20,"edi"),"eax");         # rk[5]
2711                 &xor    ("eax",&DWP(8,"edi"));
2712                 &mov    (&DWP(24,"edi"),"eax");         # rk[6]
2713                 &xor    ("eax",&DWP(12,"edi"));
2714                 &mov    (&DWP(28,"edi"),"eax");         # rk[7]
2715                 &inc    ("ecx");
2716                 &add    ("edi",16);
2717                 &cmp    ("ecx",10);
2718         &jl     (&label("10loop"));
2719
2720         &mov    (&DWP(80,"edi"),10);            # setup number of rounds
2721         &xor    ("eax","eax");
2722         &jmp    (&label("exit"));
2723                 
2724     &set_label("12rounds");
2725         &mov    ("eax",&DWP(0,"esi"));          # copy first 6 dwords
2726         &mov    ("ebx",&DWP(4,"esi"));
2727         &mov    ("ecx",&DWP(8,"esi"));
2728         &mov    ("edx",&DWP(12,"esi"));
2729         &mov    (&DWP(0,"edi"),"eax");
2730         &mov    (&DWP(4,"edi"),"ebx");
2731         &mov    (&DWP(8,"edi"),"ecx");
2732         &mov    (&DWP(12,"edi"),"edx");
2733         &mov    ("ecx",&DWP(16,"esi"));
2734         &mov    ("edx",&DWP(20,"esi"));
2735         &mov    (&DWP(16,"edi"),"ecx");
2736         &mov    (&DWP(20,"edi"),"edx");
2737
2738         &xor    ("ecx","ecx");
2739         &jmp    (&label("12shortcut"));
2740
2741         &align  (4);
2742         &set_label("12loop");
2743                 &mov    ("eax",&DWP(0,"edi"));          # rk[0]
2744                 &mov    ("edx",&DWP(20,"edi"));         # rk[5]
2745         &set_label("12shortcut");
2746                 &enckey ();
2747
2748                 &mov    (&DWP(24,"edi"),"eax");         # rk[6]
2749                 &xor    ("eax",&DWP(4,"edi"));
2750                 &mov    (&DWP(28,"edi"),"eax");         # rk[7]
2751                 &xor    ("eax",&DWP(8,"edi"));
2752                 &mov    (&DWP(32,"edi"),"eax");         # rk[8]
2753                 &xor    ("eax",&DWP(12,"edi"));
2754                 &mov    (&DWP(36,"edi"),"eax");         # rk[9]
2755
2756                 &cmp    ("ecx",7);
2757                 &je     (&label("12break"));
2758                 &inc    ("ecx");
2759
2760                 &xor    ("eax",&DWP(16,"edi"));
2761                 &mov    (&DWP(40,"edi"),"eax");         # rk[10]
2762                 &xor    ("eax",&DWP(20,"edi"));
2763                 &mov    (&DWP(44,"edi"),"eax");         # rk[11]
2764
2765                 &add    ("edi",24);
2766         &jmp    (&label("12loop"));
2767
2768         &set_label("12break");
2769         &mov    (&DWP(72,"edi"),12);            # setup number of rounds
2770         &xor    ("eax","eax");
2771         &jmp    (&label("exit"));
2772
2773     &set_label("14rounds");
2774         &mov    ("eax",&DWP(0,"esi"));          # copy first 8 dwords
2775         &mov    ("ebx",&DWP(4,"esi"));
2776         &mov    ("ecx",&DWP(8,"esi"));
2777         &mov    ("edx",&DWP(12,"esi"));
2778         &mov    (&DWP(0,"edi"),"eax");
2779         &mov    (&DWP(4,"edi"),"ebx");
2780         &mov    (&DWP(8,"edi"),"ecx");
2781         &mov    (&DWP(12,"edi"),"edx");
2782         &mov    ("eax",&DWP(16,"esi"));
2783         &mov    ("ebx",&DWP(20,"esi"));
2784         &mov    ("ecx",&DWP(24,"esi"));
2785         &mov    ("edx",&DWP(28,"esi"));
2786         &mov    (&DWP(16,"edi"),"eax");
2787         &mov    (&DWP(20,"edi"),"ebx");
2788         &mov    (&DWP(24,"edi"),"ecx");
2789         &mov    (&DWP(28,"edi"),"edx");
2790
2791         &xor    ("ecx","ecx");
2792         &jmp    (&label("14shortcut"));
2793
2794         &align  (4);
2795         &set_label("14loop");
2796                 &mov    ("edx",&DWP(28,"edi"));         # rk[7]
2797         &set_label("14shortcut");
2798                 &mov    ("eax",&DWP(0,"edi"));          # rk[0]
2799
2800                 &enckey ();
2801
2802                 &mov    (&DWP(32,"edi"),"eax");         # rk[8]
2803                 &xor    ("eax",&DWP(4,"edi"));
2804                 &mov    (&DWP(36,"edi"),"eax");         # rk[9]
2805                 &xor    ("eax",&DWP(8,"edi"));
2806                 &mov    (&DWP(40,"edi"),"eax");         # rk[10]
2807                 &xor    ("eax",&DWP(12,"edi"));
2808                 &mov    (&DWP(44,"edi"),"eax");         # rk[11]
2809
2810                 &cmp    ("ecx",6);
2811                 &je     (&label("14break"));
2812                 &inc    ("ecx");
2813
2814                 &mov    ("edx","eax");
2815                 &mov    ("eax",&DWP(16,"edi"));         # rk[4]
2816                 &movz   ("esi",&LB("edx"));             # rk[11]>>0
2817                 &movz   ("ebx",&BP(-128,$tbl,"esi",1));
2818                 &movz   ("esi",&HB("edx"));             # rk[11]>>8
2819                 &xor    ("eax","ebx");
2820
2821                 &movz   ("ebx",&BP(-128,$tbl,"esi",1));
2822                 &shr    ("edx",16);
2823                 &shl    ("ebx",8);
2824                 &movz   ("esi",&LB("edx"));             # rk[11]>>16
2825                 &xor    ("eax","ebx");
2826
2827                 &movz   ("ebx",&BP(-128,$tbl,"esi",1));
2828                 &movz   ("esi",&HB("edx"));             # rk[11]>>24
2829                 &shl    ("ebx",16);
2830                 &xor    ("eax","ebx");
2831
2832                 &movz   ("ebx",&BP(-128,$tbl,"esi",1));
2833                 &shl    ("ebx",24);
2834                 &xor    ("eax","ebx");
2835
2836                 &mov    (&DWP(48,"edi"),"eax");         # rk[12]
2837                 &xor    ("eax",&DWP(20,"edi"));
2838                 &mov    (&DWP(52,"edi"),"eax");         # rk[13]
2839                 &xor    ("eax",&DWP(24,"edi"));
2840                 &mov    (&DWP(56,"edi"),"eax");         # rk[14]
2841                 &xor    ("eax",&DWP(28,"edi"));
2842                 &mov    (&DWP(60,"edi"),"eax");         # rk[15]
2843
2844                 &add    ("edi",32);
2845         &jmp    (&label("14loop"));
2846
2847         &set_label("14break");
2848         &mov    (&DWP(48,"edi"),14);            # setup number of rounds
2849         &xor    ("eax","eax");
2850         &jmp    (&label("exit"));
2851
2852     &set_label("badpointer");
2853         &mov    ("eax",-1);
2854     &set_label("exit");
2855 &function_end("_x86_AES_set_encrypt_key");
2856
2857 # int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
2858 #                        AES_KEY *key)
2859 &function_begin_B("AES_set_encrypt_key");
2860         &call   ("_x86_AES_set_encrypt_key");
2861         &ret    ();
2862 &function_end_B("AES_set_encrypt_key");
2863
2864 sub deckey()
2865 { my ($i,$key,$tp1,$tp2,$tp4,$tp8) = @_;
2866   my $tmp = $tbl;
2867
2868         &mov    ($acc,$tp1);
2869         &and    ($acc,0x80808080);
2870         &mov    ($tmp,$acc);
2871         &shr    ($tmp,7);
2872         &lea    ($tp2,&DWP(0,$tp1,$tp1));
2873         &sub    ($acc,$tmp);
2874         &and    ($tp2,0xfefefefe);
2875         &and    ($acc,0x1b1b1b1b);
2876         &xor    ($acc,$tp2);
2877         &mov    ($tp2,$acc);
2878
2879         &and    ($acc,0x80808080);
2880         &mov    ($tmp,$acc);
2881         &shr    ($tmp,7);
2882         &lea    ($tp4,&DWP(0,$tp2,$tp2));
2883         &sub    ($acc,$tmp);
2884         &and    ($tp4,0xfefefefe);
2885         &and    ($acc,0x1b1b1b1b);
2886          &xor   ($tp2,$tp1);    # tp2^tp1
2887         &xor    ($acc,$tp4);
2888         &mov    ($tp4,$acc);
2889
2890         &and    ($acc,0x80808080);
2891         &mov    ($tmp,$acc);
2892         &shr    ($tmp,7);
2893         &lea    ($tp8,&DWP(0,$tp4,$tp4));
2894          &xor   ($tp4,$tp1);    # tp4^tp1
2895         &sub    ($acc,$tmp);
2896         &and    ($tp8,0xfefefefe);
2897         &and    ($acc,0x1b1b1b1b);
2898          &rotl  ($tp1,8);       # = ROTATE(tp1,8)
2899         &xor    ($tp8,$acc);
2900
2901         &mov    ($tmp,&DWP(4*($i+1),$key));     # modulo-scheduled load
2902
2903         &xor    ($tp1,$tp2);
2904         &xor    ($tp2,$tp8);
2905         &xor    ($tp1,$tp4);
2906         &rotl   ($tp2,24);
2907         &xor    ($tp4,$tp8);
2908         &xor    ($tp1,$tp8);    # ^= tp8^(tp4^tp1)^(tp2^tp1)
2909         &rotl   ($tp4,16);
2910         &xor    ($tp1,$tp2);    # ^= ROTATE(tp8^tp2^tp1,24)
2911         &rotl   ($tp8,8);
2912         &xor    ($tp1,$tp4);    # ^= ROTATE(tp8^tp4^tp1,16)
2913         &mov    ($tp2,$tmp);
2914         &xor    ($tp1,$tp8);    # ^= ROTATE(tp8,8)
2915
2916         &mov    (&DWP(4*$i,$key),$tp1);
2917 }
2918
2919 # int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
2920 #                        AES_KEY *key)
2921 &function_begin_B("AES_set_decrypt_key");
2922         &call   ("_x86_AES_set_encrypt_key");
2923         &cmp    ("eax",0);
2924         &je     (&label("proceed"));
2925         &ret    ();
2926
2927     &set_label("proceed");
2928         &push   ("ebp");
2929         &push   ("ebx");
2930         &push   ("esi");
2931         &push   ("edi");
2932
2933         &mov    ("esi",&wparam(2));
2934         &mov    ("ecx",&DWP(240,"esi"));        # pull number of rounds
2935         &lea    ("ecx",&DWP(0,"","ecx",4));
2936         &lea    ("edi",&DWP(0,"esi","ecx",4));  # pointer to last chunk
2937
2938         &set_label("invert",4);                 # invert order of chunks
2939                 &mov    ("eax",&DWP(0,"esi"));
2940                 &mov    ("ebx",&DWP(4,"esi"));
2941                 &mov    ("ecx",&DWP(0,"edi"));
2942                 &mov    ("edx",&DWP(4,"edi"));
2943                 &mov    (&DWP(0,"edi"),"eax");
2944                 &mov    (&DWP(4,"edi"),"ebx");
2945                 &mov    (&DWP(0,"esi"),"ecx");
2946                 &mov    (&DWP(4,"esi"),"edx");
2947                 &mov    ("eax",&DWP(8,"esi"));
2948                 &mov    ("ebx",&DWP(12,"esi"));
2949                 &mov    ("ecx",&DWP(8,"edi"));
2950                 &mov    ("edx",&DWP(12,"edi"));
2951                 &mov    (&DWP(8,"edi"),"eax");
2952                 &mov    (&DWP(12,"edi"),"ebx");
2953                 &mov    (&DWP(8,"esi"),"ecx");
2954                 &mov    (&DWP(12,"esi"),"edx");
2955                 &add    ("esi",16);
2956                 &sub    ("edi",16);
2957                 &cmp    ("esi","edi");
2958         &jne    (&label("invert"));
2959
2960         &mov    ($key,&wparam(2));
2961         &mov    ($acc,&DWP(240,$key));          # pull number of rounds
2962         &lea    ($acc,&DWP(-2,$acc,$acc));
2963         &lea    ($acc,&DWP(0,$key,$acc,8));
2964         &mov    (&wparam(2),$acc);
2965
2966         &mov    ($s0,&DWP(16,$key));            # modulo-scheduled load
2967         &set_label("permute",4);                # permute the key schedule
2968                 &add    ($key,16);
2969                 &deckey (0,$key,$s0,$s1,$s2,$s3);
2970                 &deckey (1,$key,$s1,$s2,$s3,$s0);
2971                 &deckey (2,$key,$s2,$s3,$s0,$s1);
2972                 &deckey (3,$key,$s3,$s0,$s1,$s2);
2973                 &cmp    ($key,&wparam(2));
2974        &nbs