7d69f0f4958dad08329eb4bc603986fcd24acf10
[openssl.git] / crypto / sha / asm / sha512-armv8.pl
1 #!/usr/bin/env perl
2 #
3 # ====================================================================
4 # Written by Andy Polyakov <appro@openssl.org> 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 # SHA256/512 for ARMv8.
11 #
12 # Performance in cycles per processed byte and improvement coefficient
13 # over code generated with "default" compiler:
14 #
15 #               SHA256-hw       SHA256(*)       SHA512
16 # Apple A7      1.97            10.5 (+33%)     6.73 (-1%(**))
17 # Cortex-A53    2.38            15.5 (+115%)    10.0 (+150%(***))
18 # Cortex-A57    2.31            11.6 (+86%)     7.51 (+260%(***))
19 # Denver        2.01            10.5 (+26%)     6.70 (+8%)
20 # X-Gene                        20.0 (+100%)    12.8 (+300%(***))
21
22 # (*)   Software SHA256 results are of lesser relevance, presented
23 #       mostly for informational purposes.
24 # (**)  The result is a trade-off: it's possible to improve it by
25 #       10% (or by 1 cycle per round), but at the cost of 20% loss
26 #       on Cortex-A53 (or by 4 cycles per round).
27 # (***) Super-impressive coefficients over gcc-generated code are
28 #       indication of some compiler "pathology", most notably code
29 #       generated with -mgeneral-regs-only is significanty faster
30 #       and the gap is only 40-90%.
31
32 $flavour=shift;
33 $output=shift;
34
35 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
36 ( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
37 ( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or
38 die "can't locate arm-xlate.pl";
39
40 open OUT,"| \"$^X\" $xlate $flavour $output";
41 *STDOUT=*OUT;
42
43 if ($output =~ /512/) {
44         $BITS=512;
45         $SZ=8;
46         @Sigma0=(28,34,39);
47         @Sigma1=(14,18,41);
48         @sigma0=(1,  8, 7);
49         @sigma1=(19,61, 6);
50         $rounds=80;
51         $reg_t="x";
52 } else {
53         $BITS=256;
54         $SZ=4;
55         @Sigma0=( 2,13,22);
56         @Sigma1=( 6,11,25);
57         @sigma0=( 7,18, 3);
58         @sigma1=(17,19,10);
59         $rounds=64;
60         $reg_t="w";
61 }
62
63 $func="sha${BITS}_block_data_order";
64
65 ($ctx,$inp,$num,$Ktbl)=map("x$_",(0..2,30));
66
67 @X=map("$reg_t$_",(3..15,0..2));
68 @V=($A,$B,$C,$D,$E,$F,$G,$H)=map("$reg_t$_",(20..27));
69 ($t0,$t1,$t2,$t3)=map("$reg_t$_",(16,17,19,28));
70
71 sub BODY_00_xx {
72 my ($i,$a,$b,$c,$d,$e,$f,$g,$h)=@_;
73 my $j=($i+1)&15;
74 my ($T0,$T1,$T2)=(@X[($i-8)&15],@X[($i-9)&15],@X[($i-10)&15]);
75    $T0=@X[$i+3] if ($i<11);
76
77 $code.=<<___    if ($i<16);
78 #ifndef __ARMEB__
79         rev     @X[$i],@X[$i]                   // $i
80 #endif
81 ___
82 $code.=<<___    if ($i<13 && ($i&1));
83         ldp     @X[$i+1],@X[$i+2],[$inp],#2*$SZ
84 ___
85 $code.=<<___    if ($i==13);
86         ldp     @X[14],@X[15],[$inp]
87 ___
88 $code.=<<___    if ($i>=14);
89         ldr     @X[($i-11)&15],[sp,#`$SZ*(($i-11)%4)`]
90 ___
91 $code.=<<___    if ($i>0 && $i<16);
92         add     $a,$a,$t1                       // h+=Sigma0(a)
93 ___
94 $code.=<<___    if ($i>=11);
95         str     @X[($i-8)&15],[sp,#`$SZ*(($i-8)%4)`]
96 ___
97 # While ARMv8 specifies merged rotate-n-logical operation such as
98 # 'eor x,y,z,ror#n', it was found to negatively affect performance
99 # on Apple A7. The reason seems to be that it requires even 'y' to
100 # be available earlier. This means that such merged instruction is
101 # not necessarily best choice on critical path... On the other hand
102 # Cortex-A5x handles merged instructions much better than disjoint
103 # rotate and logical... See (**) footnote above.
104 $code.=<<___    if ($i<15);
105         ror     $t0,$e,#$Sigma1[0]
106         add     $h,$h,$t2                       // h+=K[i]
107         eor     $T0,$e,$e,ror#`$Sigma1[2]-$Sigma1[1]`
108         and     $t1,$f,$e
109         bic     $t2,$g,$e
110         add     $h,$h,@X[$i&15]                 // h+=X[i]
111         orr     $t1,$t1,$t2                     // Ch(e,f,g)
112         eor     $t2,$a,$b                       // a^b, b^c in next round
113         eor     $t0,$t0,$T0,ror#$Sigma1[1]      // Sigma1(e)
114         ror     $T0,$a,#$Sigma0[0]
115         add     $h,$h,$t1                       // h+=Ch(e,f,g)
116         eor     $t1,$a,$a,ror#`$Sigma0[2]-$Sigma0[1]`
117         add     $h,$h,$t0                       // h+=Sigma1(e)
118         and     $t3,$t3,$t2                     // (b^c)&=(a^b)
119         add     $d,$d,$h                        // d+=h
120         eor     $t3,$t3,$b                      // Maj(a,b,c)
121         eor     $t1,$T0,$t1,ror#$Sigma0[1]      // Sigma0(a)
122         add     $h,$h,$t3                       // h+=Maj(a,b,c)
123         ldr     $t3,[$Ktbl],#$SZ                // *K++, $t2 in next round
124         //add   $h,$h,$t1                       // h+=Sigma0(a)
125 ___
126 $code.=<<___    if ($i>=15);
127         ror     $t0,$e,#$Sigma1[0]
128         add     $h,$h,$t2                       // h+=K[i]
129         ror     $T1,@X[($j+1)&15],#$sigma0[0]
130         and     $t1,$f,$e
131         ror     $T2,@X[($j+14)&15],#$sigma1[0]
132         bic     $t2,$g,$e
133         ror     $T0,$a,#$Sigma0[0]
134         add     $h,$h,@X[$i&15]                 // h+=X[i]
135         eor     $t0,$t0,$e,ror#$Sigma1[1]
136         eor     $T1,$T1,@X[($j+1)&15],ror#$sigma0[1]
137         orr     $t1,$t1,$t2                     // Ch(e,f,g)
138         eor     $t2,$a,$b                       // a^b, b^c in next round
139         eor     $t0,$t0,$e,ror#$Sigma1[2]       // Sigma1(e)
140         eor     $T0,$T0,$a,ror#$Sigma0[1]
141         add     $h,$h,$t1                       // h+=Ch(e,f,g)
142         and     $t3,$t3,$t2                     // (b^c)&=(a^b)
143         eor     $T2,$T2,@X[($j+14)&15],ror#$sigma1[1]
144         eor     $T1,$T1,@X[($j+1)&15],lsr#$sigma0[2]    // sigma0(X[i+1])
145         add     $h,$h,$t0                       // h+=Sigma1(e)
146         eor     $t3,$t3,$b                      // Maj(a,b,c)
147         eor     $t1,$T0,$a,ror#$Sigma0[2]       // Sigma0(a)
148         eor     $T2,$T2,@X[($j+14)&15],lsr#$sigma1[2]   // sigma1(X[i+14])
149         add     @X[$j],@X[$j],@X[($j+9)&15]
150         add     $d,$d,$h                        // d+=h
151         add     $h,$h,$t3                       // h+=Maj(a,b,c)
152         ldr     $t3,[$Ktbl],#$SZ                // *K++, $t2 in next round
153         add     @X[$j],@X[$j],$T1
154         add     $h,$h,$t1                       // h+=Sigma0(a)
155         add     @X[$j],@X[$j],$T2
156 ___
157         ($t2,$t3)=($t3,$t2);
158 }
159
160 $code.=<<___;
161 #include "arm_arch.h"
162
163 .text
164
165 .extern OPENSSL_armcap_P
166 .globl  $func
167 .type   $func,%function
168 .align  6
169 $func:
170 ___
171 $code.=<<___    if ($SZ==4);
172 #ifdef  __ILP32__
173         ldrsw   x16,.LOPENSSL_armcap_P
174 #else
175         ldr     x16,.LOPENSSL_armcap_P
176 #endif
177         adr     x17,.LOPENSSL_armcap_P
178         add     x16,x16,x17
179         ldr     w16,[x16]
180         tst     w16,#ARMV8_SHA256
181         b.ne    .Lv8_entry
182 ___
183 $code.=<<___;
184         stp     x29,x30,[sp,#-128]!
185         add     x29,sp,#0
186
187         stp     x19,x20,[sp,#16]
188         stp     x21,x22,[sp,#32]
189         stp     x23,x24,[sp,#48]
190         stp     x25,x26,[sp,#64]
191         stp     x27,x28,[sp,#80]
192         sub     sp,sp,#4*$SZ
193
194         ldp     $A,$B,[$ctx]                            // load context
195         ldp     $C,$D,[$ctx,#2*$SZ]
196         ldp     $E,$F,[$ctx,#4*$SZ]
197         add     $num,$inp,$num,lsl#`log(16*$SZ)/log(2)` // end of input
198         ldp     $G,$H,[$ctx,#6*$SZ]
199         adr     $Ktbl,.LK$BITS
200         stp     $ctx,$num,[x29,#96]
201
202 .Loop:
203         ldp     @X[0],@X[1],[$inp],#2*$SZ
204         ldr     $t2,[$Ktbl],#$SZ                        // *K++
205         eor     $t3,$B,$C                               // magic seed
206         str     $inp,[x29,#112]
207 ___
208 for ($i=0;$i<16;$i++)   { &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
209 $code.=".Loop_16_xx:\n";
210 for (;$i<32;$i++)       { &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
211 $code.=<<___;
212         cbnz    $t2,.Loop_16_xx
213
214         ldp     $ctx,$num,[x29,#96]
215         ldr     $inp,[x29,#112]
216         sub     $Ktbl,$Ktbl,#`$SZ*($rounds+1)`          // rewind
217
218         ldp     @X[0],@X[1],[$ctx]
219         ldp     @X[2],@X[3],[$ctx,#2*$SZ]
220         add     $inp,$inp,#14*$SZ                       // advance input pointer
221         ldp     @X[4],@X[5],[$ctx,#4*$SZ]
222         add     $A,$A,@X[0]
223         ldp     @X[6],@X[7],[$ctx,#6*$SZ]
224         add     $B,$B,@X[1]
225         add     $C,$C,@X[2]
226         add     $D,$D,@X[3]
227         stp     $A,$B,[$ctx]
228         add     $E,$E,@X[4]
229         add     $F,$F,@X[5]
230         stp     $C,$D,[$ctx,#2*$SZ]
231         add     $G,$G,@X[6]
232         add     $H,$H,@X[7]
233         cmp     $inp,$num
234         stp     $E,$F,[$ctx,#4*$SZ]
235         stp     $G,$H,[$ctx,#6*$SZ]
236         b.ne    .Loop
237
238         ldp     x19,x20,[x29,#16]
239         add     sp,sp,#4*$SZ
240         ldp     x21,x22,[x29,#32]
241         ldp     x23,x24,[x29,#48]
242         ldp     x25,x26,[x29,#64]
243         ldp     x27,x28,[x29,#80]
244         ldp     x29,x30,[sp],#128
245         ret
246 .size   $func,.-$func
247
248 .align  6
249 .type   .LK$BITS,%object
250 .LK$BITS:
251 ___
252 $code.=<<___ if ($SZ==8);
253         .quad   0x428a2f98d728ae22,0x7137449123ef65cd
254         .quad   0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
255         .quad   0x3956c25bf348b538,0x59f111f1b605d019
256         .quad   0x923f82a4af194f9b,0xab1c5ed5da6d8118
257         .quad   0xd807aa98a3030242,0x12835b0145706fbe
258         .quad   0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
259         .quad   0x72be5d74f27b896f,0x80deb1fe3b1696b1
260         .quad   0x9bdc06a725c71235,0xc19bf174cf692694
261         .quad   0xe49b69c19ef14ad2,0xefbe4786384f25e3
262         .quad   0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
263         .quad   0x2de92c6f592b0275,0x4a7484aa6ea6e483
264         .quad   0x5cb0a9dcbd41fbd4,0x76f988da831153b5
265         .quad   0x983e5152ee66dfab,0xa831c66d2db43210
266         .quad   0xb00327c898fb213f,0xbf597fc7beef0ee4
267         .quad   0xc6e00bf33da88fc2,0xd5a79147930aa725
268         .quad   0x06ca6351e003826f,0x142929670a0e6e70
269         .quad   0x27b70a8546d22ffc,0x2e1b21385c26c926
270         .quad   0x4d2c6dfc5ac42aed,0x53380d139d95b3df
271         .quad   0x650a73548baf63de,0x766a0abb3c77b2a8
272         .quad   0x81c2c92e47edaee6,0x92722c851482353b
273         .quad   0xa2bfe8a14cf10364,0xa81a664bbc423001
274         .quad   0xc24b8b70d0f89791,0xc76c51a30654be30
275         .quad   0xd192e819d6ef5218,0xd69906245565a910
276         .quad   0xf40e35855771202a,0x106aa07032bbd1b8
277         .quad   0x19a4c116b8d2d0c8,0x1e376c085141ab53
278         .quad   0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
279         .quad   0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
280         .quad   0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
281         .quad   0x748f82ee5defb2fc,0x78a5636f43172f60
282         .quad   0x84c87814a1f0ab72,0x8cc702081a6439ec
283         .quad   0x90befffa23631e28,0xa4506cebde82bde9
284         .quad   0xbef9a3f7b2c67915,0xc67178f2e372532b
285         .quad   0xca273eceea26619c,0xd186b8c721c0c207
286         .quad   0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
287         .quad   0x06f067aa72176fba,0x0a637dc5a2c898a6
288         .quad   0x113f9804bef90dae,0x1b710b35131c471b
289         .quad   0x28db77f523047d84,0x32caab7b40c72493
290         .quad   0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
291         .quad   0x4cc5d4becb3e42b6,0x597f299cfc657e2a
292         .quad   0x5fcb6fab3ad6faec,0x6c44198c4a475817
293         .quad   0       // terminator
294 ___
295 $code.=<<___ if ($SZ==4);
296         .long   0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
297         .long   0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
298         .long   0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
299         .long   0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
300         .long   0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
301         .long   0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
302         .long   0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
303         .long   0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
304         .long   0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
305         .long   0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
306         .long   0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
307         .long   0xd192e819,0xd6990624,0xf40e3585,0x106aa070
308         .long   0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
309         .long   0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
310         .long   0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
311         .long   0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
312         .long   0       //terminator
313 ___
314 $code.=<<___;
315 .size   .LK$BITS,.-.LK$BITS
316 .align  3
317 .LOPENSSL_armcap_P:
318 #ifdef  __ILP32__
319         .long   OPENSSL_armcap_P-.
320 #else
321         .quad   OPENSSL_armcap_P-.
322 #endif
323 .asciz  "SHA$BITS block transform for ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
324 .align  2
325 ___
326
327 if ($SZ==4) {
328 my $Ktbl="x3";
329
330 my ($ABCD,$EFGH,$abcd)=map("v$_.16b",(0..2));
331 my @MSG=map("v$_.16b",(4..7));
332 my ($W0,$W1)=("v16.4s","v17.4s");
333 my ($ABCD_SAVE,$EFGH_SAVE)=("v18.16b","v19.16b");
334
335 $code.=<<___;
336 .type   sha256_block_armv8,%function
337 .align  6
338 sha256_block_armv8:
339 .Lv8_entry:
340         stp             x29,x30,[sp,#-16]!
341         add             x29,sp,#0
342
343         ld1.32          {$ABCD,$EFGH},[$ctx]
344         adr             $Ktbl,.LK256
345
346 .Loop_hw:
347         ld1             {@MSG[0]-@MSG[3]},[$inp],#64
348         sub             $num,$num,#1
349         ld1.32          {$W0},[$Ktbl],#16
350         rev32           @MSG[0],@MSG[0]
351         rev32           @MSG[1],@MSG[1]
352         rev32           @MSG[2],@MSG[2]
353         rev32           @MSG[3],@MSG[3]
354         orr             $ABCD_SAVE,$ABCD,$ABCD          // offload
355         orr             $EFGH_SAVE,$EFGH,$EFGH
356 ___
357 for($i=0;$i<12;$i++) {
358 $code.=<<___;
359         ld1.32          {$W1},[$Ktbl],#16
360         add.i32         $W0,$W0,@MSG[0]
361         sha256su0       @MSG[0],@MSG[1]
362         orr             $abcd,$ABCD,$ABCD
363         sha256h         $ABCD,$EFGH,$W0
364         sha256h2        $EFGH,$abcd,$W0
365         sha256su1       @MSG[0],@MSG[2],@MSG[3]
366 ___
367         ($W0,$W1)=($W1,$W0);    push(@MSG,shift(@MSG));
368 }
369 $code.=<<___;
370         ld1.32          {$W1},[$Ktbl],#16
371         add.i32         $W0,$W0,@MSG[0]
372         orr             $abcd,$ABCD,$ABCD
373         sha256h         $ABCD,$EFGH,$W0
374         sha256h2        $EFGH,$abcd,$W0
375
376         ld1.32          {$W0},[$Ktbl],#16
377         add.i32         $W1,$W1,@MSG[1]
378         orr             $abcd,$ABCD,$ABCD
379         sha256h         $ABCD,$EFGH,$W1
380         sha256h2        $EFGH,$abcd,$W1
381
382         ld1.32          {$W1},[$Ktbl]
383         add.i32         $W0,$W0,@MSG[2]
384         sub             $Ktbl,$Ktbl,#$rounds*$SZ-16     // rewind
385         orr             $abcd,$ABCD,$ABCD
386         sha256h         $ABCD,$EFGH,$W0
387         sha256h2        $EFGH,$abcd,$W0
388
389         add.i32         $W1,$W1,@MSG[3]
390         orr             $abcd,$ABCD,$ABCD
391         sha256h         $ABCD,$EFGH,$W1
392         sha256h2        $EFGH,$abcd,$W1
393
394         add.i32         $ABCD,$ABCD,$ABCD_SAVE
395         add.i32         $EFGH,$EFGH,$EFGH_SAVE
396
397         cbnz            $num,.Loop_hw
398
399         st1.32          {$ABCD,$EFGH},[$ctx]
400
401         ldr             x29,[sp],#16
402         ret
403 .size   sha256_block_armv8,.-sha256_block_armv8
404 ___
405 }
406
407 $code.=<<___;
408 .comm   OPENSSL_armcap_P,4,4
409 ___
410
411 {   my  %opcode = (
412         "sha256h"       => 0x5e004000,  "sha256h2"      => 0x5e005000,
413         "sha256su0"     => 0x5e282800,  "sha256su1"     => 0x5e006000   );
414
415     sub unsha256 {
416         my ($mnemonic,$arg)=@_;
417
418         $arg =~ m/[qv]([0-9]+)[^,]*,\s*[qv]([0-9]+)[^,]*(?:,\s*[qv]([0-9]+))?/o
419         &&
420         sprintf ".inst\t0x%08x\t//%s %s",
421                         $opcode{$mnemonic}|$1|($2<<5)|($3<<16),
422                         $mnemonic,$arg;
423     }
424 }
425
426 foreach(split("\n",$code)) {
427
428         s/\`([^\`]*)\`/eval($1)/geo;
429
430         s/\b(sha256\w+)\s+([qv].*)/unsha256($1,$2)/geo;
431
432         s/\.\w?32\b//o          and s/\.16b/\.4s/go;
433         m/(ld|st)1[^\[]+\[0\]/o and s/\.4s/\.s/go;
434
435         print $_,"\n";
436 }
437
438 close STDOUT;