engines/asm/e_padlock-x86.pl

   1 #! /usr/bin/env perl
   2 # Copyright 2011-2016 The OpenSSL Project Authors. All Rights Reserved.
   3 #
   4 # Licensed under the OpenSSL license (the "License").  You may not use
   5 # this file except in compliance with the License.  You can obtain a copy
   6 # in the file LICENSE in the source distribution or at
   7 # https://www.openssl.org/source/license.html
   8
   9
  10 # ====================================================================
  11 # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
  12 # project. The module is, however, dual licensed under OpenSSL and
  13 # CRYPTOGAMS licenses depending on where you obtain it. For further
  14 # details see http://www.openssl.org/~appro/cryptogams/.
  15 # ====================================================================
  16
  17 # September 2011
  18 #
  19 # Assembler helpers for Padlock engine. Compared to original engine
  20 # version relying on inline assembler and compiled with gcc 3.4.6 it
  21 # was measured to provide ~100% improvement on misaligned data in ECB
  22 # mode and ~75% in CBC mode. For aligned data improvement can be
  23 # observed for short inputs only, e.g. 45% for 64-byte messages in
  24 # ECB mode, 20% in CBC. Difference in performance for aligned vs.
  25 # misaligned data depends on misalignment and is either ~1.8x or 2.9x.
  26 # These are approximately same factors as for hardware support, so
  27 # there is little reason to rely on the latter. On the contrary, it
  28 # might actually hurt performance in mixture of aligned and misaligned
  29 # buffers, because a) if you choose to flip 'align' flag in control
  30 # word on per-buffer basis, then you'd have to reload key context,
  31 # which incurs penalty; b) if you choose to set 'align' flag
  32 # permanently, it limits performance even for aligned data to ~1/2.
  33 # All above mentioned results were collected on 1.5GHz C7. Nano on the
  34 # other hand handles unaligned data more gracefully. Depending on
  35 # algorithm and how unaligned data is, hardware can be up to 70% more
  36 # efficient than below software alignment procedures, nor does 'align'
  37 # flag have affect on aligned performance [if has any meaning at all].
  38 # Therefore suggestion is to unconditionally set 'align' flag on Nano
  39 # for optimal performance.
  40
  41 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  42 push(@INC,"${dir}","${dir}../../crypto/perlasm");
  43 require "x86asm.pl";
  44
  45 $output=pop;
  46 open STDOUT,">$output";
  47
  48 &asm_init($ARGV[0]);
  49
  50 %PADLOCK_PREFETCH=(ecb=>128, cbc=>64);  # prefetch errata
  51 $PADLOCK_CHUNK=512;     # Must be a power of 2 larger than 16
  52
  53 $ctx="edx";
  54 $out="edi";
  55 $inp="esi";
  56 $len="ecx";
  57 $chunk="ebx";
  58
  59 &function_begin_B("padlock_capability");
  60         &push   ("ebx");
  61         &pushf  ();
  62         &pop    ("eax");
  63         &mov    ("ecx","eax");
  64         &xor    ("eax",1<<21);
  65         &push   ("eax");
  66         &popf   ();
  67         &pushf  ();
  68         &pop    ("eax");
  69         &xor    ("ecx","eax");
  70         &xor    ("eax","eax");
  71         &bt     ("ecx",21);
  72         &jnc    (&label("noluck"));
  73         &cpuid  ();
  74         &xor    ("eax","eax");
  75         &cmp    ("ebx","0x".unpack("H*",'tneC'));
  76         &jne    (&label("zhaoxin"));
  77         &cmp    ("edx","0x".unpack("H*",'Hrua'));
  78         &jne    (&label("noluck"));
  79         &cmp    ("ecx","0x".unpack("H*",'slua'));
  80         &jne    (&label("noluck"));
  81         &jmp    (&label("zhaoxinEnd"));
  82 &set_label("zhaoxin");
  83         &cmp    ("ebx","0x".unpack("H*",'hS  '));
  84         &jne    (&label("noluck"));
  85         &cmp    ("edx","0x".unpack("H*",'hgna'));
  86         &jne    (&label("noluck"));
  87         &cmp    ("ecx","0x".unpack("H*",'  ia'));
  88         &jne    (&label("noluck"));
  89 &set_label("zhaoxinEnd");
  90         &mov    ("eax",0xC0000000);
  91         &cpuid  ();
  92         &mov    ("edx","eax");
  93         &xor    ("eax","eax");
  94         &cmp    ("edx",0xC0000001);
  95         &jb     (&label("noluck"));
  96         &mov    ("eax",1);
  97         &cpuid  ();
  98         &or     ("eax",0x0f);
  99         &xor    ("ebx","ebx");
 100         &and    ("eax",0x0fff);
 101         &cmp    ("eax",0x06ff);         # check for Nano
 102         &sete   ("bl");
 103         &mov    ("eax",0xC0000001);
 104         &push   ("ebx");
 105         &cpuid  ();
 106         &pop    ("ebx");
 107         &mov    ("eax","edx");
 108         &shl    ("ebx",4);              # bit#4 denotes Nano
 109         &and    ("eax",0xffffffef);
 110         &or     ("eax","ebx")
 111 &set_label("noluck");
 112         &pop    ("ebx");
 113         &ret    ();
 114 &function_end_B("padlock_capability")
 115
 116 &function_begin_B("padlock_key_bswap");
 117         &mov    ("edx",&wparam(0));
 118         &mov    ("ecx",&DWP(240,"edx"));
 119 &set_label("bswap_loop");
 120         &mov    ("eax",&DWP(0,"edx"));
 121         &bswap  ("eax");
 122         &mov    (&DWP(0,"edx"),"eax");
 123         &lea    ("edx",&DWP(4,"edx"));
 124         &sub    ("ecx",1);
 125         &jnz    (&label("bswap_loop"));
 126         &ret    ();
 127 &function_end_B("padlock_key_bswap");
 128
 129 # This is heuristic key context tracing. At first one
 130 # believes that one should use atomic swap instructions,
 131 # but it's not actually necessary. Point is that if
 132 # padlock_saved_context was changed by another thread
 133 # after we've read it and before we compare it with ctx,
 134 # our key *shall* be reloaded upon thread context switch
 135 # and we are therefore set in either case...
 136 &static_label("padlock_saved_context");
 137
 138 &function_begin_B("padlock_verify_context");
 139         &mov    ($ctx,&wparam(0));
 140         &lea    ("eax",($::win32 or $::coff) ? &DWP(&label("padlock_saved_context")) :
 141                        &DWP(&label("padlock_saved_context")."-".&label("verify_pic_point")));
 142         &pushf  ();
 143         &call   ("_padlock_verify_ctx");
 144 &set_label("verify_pic_point");
 145         &lea    ("esp",&DWP(4,"esp"));
 146         &ret    ();
 147 &function_end_B("padlock_verify_context");
 148
 149 &function_begin_B("_padlock_verify_ctx");
 150         &add    ("eax",&DWP(0,"esp")) if(!($::win32 or $::coff));# &padlock_saved_context
 151         &bt     (&DWP(4,"esp"),30);             # eflags
 152         &jnc    (&label("verified"));
 153         &cmp    ($ctx,&DWP(0,"eax"));
 154         &je     (&label("verified"));
 155         &pushf  ();
 156         &popf   ();
 157 &set_label("verified");
 158         &mov    (&DWP(0,"eax"),$ctx);
 159         &ret    ();
 160 &function_end_B("_padlock_verify_ctx");
 161
 162 &function_begin_B("padlock_reload_key");
 163         &pushf  ();
 164         &popf   ();
 165         &ret    ();
 166 &function_end_B("padlock_reload_key");
 167
 168 &function_begin_B("padlock_aes_block");
 169         &push   ("edi");
 170         &push   ("esi");
 171         &push   ("ebx");
 172         &mov    ($out,&wparam(0));              # must be 16-byte aligned
 173         &mov    ($inp,&wparam(1));              # must be 16-byte aligned
 174         &mov    ($ctx,&wparam(2));
 175         &mov    ($len,1);
 176         &lea    ("ebx",&DWP(32,$ctx));          # key
 177         &lea    ($ctx,&DWP(16,$ctx));           # control word
 178         &data_byte(0xf3,0x0f,0xa7,0xc8);        # rep xcryptecb
 179         &pop    ("ebx");
 180         &pop    ("esi");
 181         &pop    ("edi");
 182         &ret    ();
 183 &function_end_B("padlock_aes_block");
 184
 185 sub generate_mode {
 186 my ($mode,$opcode) = @_;
 187 # int padlock_$mode_encrypt(void *out, const void *inp,
 188 #               struct padlock_cipher_data *ctx, size_t len);
 189 &function_begin("padlock_${mode}_encrypt");
 190         &mov    ($out,&wparam(0));
 191         &mov    ($inp,&wparam(1));
 192         &mov    ($ctx,&wparam(2));
 193         &mov    ($len,&wparam(3));
 194         &test   ($ctx,15);
 195         &jnz    (&label("${mode}_abort"));
 196         &test   ($len,15);
 197         &jnz    (&label("${mode}_abort"));
 198         &lea    ("eax",($::win32 or $::coff) ? &DWP(&label("padlock_saved_context")) :
 199                        &DWP(&label("padlock_saved_context")."-".&label("${mode}_pic_point")));
 200         &pushf  ();
 201         &cld    ();
 202         &call   ("_padlock_verify_ctx");
 203 &set_label("${mode}_pic_point");
 204         &lea    ($ctx,&DWP(16,$ctx));   # control word
 205         &xor    ("eax","eax");
 206                                         if ($mode eq "ctr32") {
 207         &movq   ("mm0",&QWP(-16,$ctx)); # load [upper part of] counter
 208                                         } else {
 209         &xor    ("ebx","ebx");
 210         &test   (&DWP(0,$ctx),1<<5);    # align bit in control word
 211         &jnz    (&label("${mode}_aligned"));
 212         &test   ($out,0x0f);
 213         &setz   ("al");                 # !out_misaligned
 214         &test   ($inp,0x0f);
 215         &setz   ("bl");                 # !inp_misaligned
 216         &test   ("eax","ebx");
 217         &jnz    (&label("${mode}_aligned"));
 218         &neg    ("eax");
 219                                         }
 220         &mov    ($chunk,$PADLOCK_CHUNK);
 221         &not    ("eax");                # out_misaligned?-1:0
 222         &lea    ("ebp",&DWP(-24,"esp"));
 223         &cmp    ($len,$chunk);
 224         &cmovc  ($chunk,$len);          # chunk=len>PADLOCK_CHUNK?PADLOCK_CHUNK:len
 225         &and    ("eax",$chunk);         # out_misaligned?chunk:0
 226         &mov    ($chunk,$len);
 227         &neg    ("eax");
 228         &and    ($chunk,$PADLOCK_CHUNK-1);      # chunk=len%PADLOCK_CHUNK
 229         &lea    ("esp",&DWP(0,"eax","ebp"));    # alloca
 230         &mov    ("eax",$PADLOCK_CHUNK);
 231         &cmovz  ($chunk,"eax");                 # chunk=chunk?:PADLOCK_CHUNK
 232         &mov    ("eax","ebp");
 233         &and    ("ebp",-16);
 234         &and    ("esp",-16);
 235         &mov    (&DWP(16,"ebp"),"eax");
 236     if ($PADLOCK_PREFETCH{$mode}) {
 237         &cmp    ($len,$chunk);
 238         &ja     (&label("${mode}_loop"));
 239         &mov    ("eax",$inp);           # check if prefetch crosses page
 240         &cmp    ("ebp","esp");
 241         &cmove  ("eax",$out);
 242         &add    ("eax",$len);
 243         &neg    ("eax");
 244         &and    ("eax",0xfff);          # distance to page boundary
 245         &cmp    ("eax",$PADLOCK_PREFETCH{$mode});
 246         &mov    ("eax",-$PADLOCK_PREFETCH{$mode});
 247         &cmovae ("eax",$chunk);         # mask=distance<prefetch?-prefetch:-1
 248         &and    ($chunk,"eax");
 249         &jz     (&label("${mode}_unaligned_tail"));
 250     }
 251         &jmp    (&label("${mode}_loop"));
 252
 253 &set_label("${mode}_loop",16);
 254         &mov    (&DWP(0,"ebp"),$out);           # save parameters
 255         &mov    (&DWP(4,"ebp"),$inp);
 256         &mov    (&DWP(8,"ebp"),$len);
 257         &mov    ($len,$chunk);
 258         &mov    (&DWP(12,"ebp"),$chunk);        # chunk
 259                                                 if ($mode eq "ctr32") {
 260         &mov    ("ecx",&DWP(-4,$ctx));
 261         &xor    ($out,$out);
 262         &mov    ("eax",&DWP(-8,$ctx));          # borrow $len
 263 &set_label("${mode}_prepare");
 264         &mov    (&DWP(12,"esp",$out),"ecx");
 265         &bswap  ("ecx");
 266         &movq   (&QWP(0,"esp",$out),"mm0");
 267         &inc    ("ecx");
 268         &mov    (&DWP(8,"esp",$out),"eax");
 269         &bswap  ("ecx");
 270         &lea    ($out,&DWP(16,$out));
 271         &cmp    ($out,$chunk);
 272         &jb     (&label("${mode}_prepare"));
 273
 274         &mov    (&DWP(-4,$ctx),"ecx");
 275         &lea    ($inp,&DWP(0,"esp"));
 276         &lea    ($out,&DWP(0,"esp"));
 277         &mov    ($len,$chunk);
 278                                                 } else {
 279         &test   ($out,0x0f);                    # out_misaligned
 280         &cmovnz ($out,"esp");
 281         &test   ($inp,0x0f);                    # inp_misaligned
 282         &jz     (&label("${mode}_inp_aligned"));
 283         &shr    ($len,2);
 284         &data_byte(0xf3,0xa5);                  # rep movsl
 285         &sub    ($out,$chunk);
 286         &mov    ($len,$chunk);
 287         &mov    ($inp,$out);
 288 &set_label("${mode}_inp_aligned");
 289                                                 }
 290         &lea    ("eax",&DWP(-16,$ctx));         # ivp
 291         &lea    ("ebx",&DWP(16,$ctx));          # key
 292         &shr    ($len,4);                       # len/=AES_BLOCK_SIZE
 293         &data_byte(0xf3,0x0f,0xa7,$opcode);     # rep xcrypt*
 294                                                 if ($mode !~ /ecb|ctr/) {
 295         &movaps ("xmm0",&QWP(0,"eax"));
 296         &movaps (&QWP(-16,$ctx),"xmm0");        # copy [or refresh] iv
 297                                                 }
 298         &mov    ($out,&DWP(0,"ebp"));           # restore parameters
 299         &mov    ($chunk,&DWP(12,"ebp"));
 300                                                 if ($mode eq "ctr32") {
 301         &mov    ($inp,&DWP(4,"ebp"));
 302         &xor    ($len,$len);
 303 &set_label("${mode}_xor");
 304         &movups ("xmm1",&QWP(0,$inp,$len));
 305         &lea    ($len,&DWP(16,$len));
 306         &pxor   ("xmm1",&QWP(-16,"esp",$len));
 307         &movups (&QWP(-16,$out,$len),"xmm1");
 308         &cmp    ($len,$chunk);
 309         &jb     (&label("${mode}_xor"));
 310                                                 } else {
 311         &test   ($out,0x0f);
 312         &jz     (&label("${mode}_out_aligned"));
 313         &mov    ($len,$chunk);
 314         &lea    ($inp,&DWP(0,"esp"));
 315         &shr    ($len,2);
 316         &data_byte(0xf3,0xa5);                  # rep movsl
 317         &sub    ($out,$chunk);
 318 &set_label("${mode}_out_aligned");
 319         &mov    ($inp,&DWP(4,"ebp"));
 320                                                 }
 321         &mov    ($len,&DWP(8,"ebp"));
 322         &add    ($out,$chunk);
 323         &add    ($inp,$chunk);
 324         &sub    ($len,$chunk);
 325         &mov    ($chunk,$PADLOCK_CHUNK);
 326     if (!$PADLOCK_PREFETCH{$mode}) {
 327         &jnz    (&label("${mode}_loop"));
 328     } else {
 329         &jz     (&label("${mode}_break"));
 330         &cmp    ($len,$chunk);
 331         &jae    (&label("${mode}_loop"));
 332
 333 &set_label("${mode}_unaligned_tail");
 334         &xor    ("eax","eax");
 335         &cmp    ("esp","ebp");
 336         &cmove  ("eax",$len);
 337         &sub    ("esp","eax");                  # alloca
 338         &mov    ("eax", $out);                  # save parameters
 339         &mov    ($chunk,$len);
 340         &shr    ($len,2);
 341         &lea    ($out,&DWP(0,"esp"));
 342         &data_byte(0xf3,0xa5);                  # rep movsl
 343         &mov    ($inp,"esp");
 344         &mov    ($out,"eax");                   # restore parameters
 345         &mov    ($len,$chunk);
 346         &jmp    (&label("${mode}_loop"));
 347
 348 &set_label("${mode}_break",16);
 349     }
 350                                                 if ($mode ne "ctr32") {
 351         &cmp    ("esp","ebp");
 352         &je     (&label("${mode}_done"));
 353                                                 }
 354         &pxor   ("xmm0","xmm0");
 355         &lea    ("eax",&DWP(0,"esp"));
 356 &set_label("${mode}_bzero");
 357         &movaps (&QWP(0,"eax"),"xmm0");
 358         &lea    ("eax",&DWP(16,"eax"));
 359         &cmp    ("ebp","eax");
 360         &ja     (&label("${mode}_bzero"));
 361
 362 &set_label("${mode}_done");
 363         &mov    ("ebp",&DWP(16,"ebp"));
 364         &lea    ("esp",&DWP(24,"ebp"));
 365                                                 if ($mode ne "ctr32") {
 366         &jmp    (&label("${mode}_exit"));
 367
 368 &set_label("${mode}_aligned",16);
 369     if ($PADLOCK_PREFETCH{$mode}) {
 370         &lea    ("ebp",&DWP(0,$inp,$len));
 371         &neg    ("ebp");
 372         &and    ("ebp",0xfff);                  # distance to page boundary
 373         &xor    ("eax","eax");
 374         &cmp    ("ebp",$PADLOCK_PREFETCH{$mode});
 375         &mov    ("ebp",$PADLOCK_PREFETCH{$mode}-1);
 376         &cmovae ("ebp","eax");
 377         &and    ("ebp",$len);                   # remainder
 378         &sub    ($len,"ebp");
 379         &jz     (&label("${mode}_aligned_tail"));
 380     }
 381         &lea    ("eax",&DWP(-16,$ctx));         # ivp
 382         &lea    ("ebx",&DWP(16,$ctx));          # key
 383         &shr    ($len,4);                       # len/=AES_BLOCK_SIZE
 384         &data_byte(0xf3,0x0f,0xa7,$opcode);     # rep xcrypt*
 385                                                 if ($mode ne "ecb") {
 386         &movaps ("xmm0",&QWP(0,"eax"));
 387         &movaps (&QWP(-16,$ctx),"xmm0");        # copy [or refresh] iv
 388                                                 }
 389     if ($PADLOCK_PREFETCH{$mode}) {
 390         &test   ("ebp","ebp");
 391         &jz     (&label("${mode}_exit"));
 392
 393 &set_label("${mode}_aligned_tail");
 394         &mov    ($len,"ebp");
 395         &lea    ("ebp",&DWP(-24,"esp"));
 396         &mov    ("esp","ebp");
 397         &mov    ("eax","ebp");
 398         &sub    ("esp",$len);
 399         &and    ("ebp",-16);
 400         &and    ("esp",-16);
 401         &mov    (&DWP(16,"ebp"),"eax");
 402         &mov    ("eax", $out);                  # save parameters
 403         &mov    ($chunk,$len);
 404         &shr    ($len,2);
 405         &lea    ($out,&DWP(0,"esp"));
 406         &data_byte(0xf3,0xa5);                  # rep movsl
 407         &mov    ($inp,"esp");
 408         &mov    ($out,"eax");                   # restore parameters
 409         &mov    ($len,$chunk);
 410         &jmp    (&label("${mode}_loop"));
 411     }
 412 &set_label("${mode}_exit");                     }
 413         &mov    ("eax",1);
 414         &lea    ("esp",&DWP(4,"esp"));          # popf
 415         &emms   ()                              if ($mode eq "ctr32");
 416 &set_label("${mode}_abort");
 417 &function_end("padlock_${mode}_encrypt");
 418 }
 419
 420 &generate_mode("ecb",0xc8);
 421 &generate_mode("cbc",0xd0);
 422 &generate_mode("cfb",0xe0);
 423 &generate_mode("ofb",0xe8);
 424 &generate_mode("ctr32",0xc8);   # yes, it implements own CTR with ECB opcode,
 425                                 # because hardware CTR was introduced later
 426                                 # and even has errata on certain C7 stepping.
 427                                 # own implementation *always* works, though
 428                                 # ~15% slower than dedicated hardware...
 429
 430 &function_begin_B("padlock_xstore");
 431         &push   ("edi");
 432         &mov    ("edi",&wparam(0));
 433         &mov    ("edx",&wparam(1));
 434         &data_byte(0x0f,0xa7,0xc0);             # xstore
 435         &pop    ("edi");
 436         &ret    ();
 437 &function_end_B("padlock_xstore");
 438
 439 &function_begin_B("_win32_segv_handler");
 440         &mov    ("eax",1);                      # ExceptionContinueSearch
 441         &mov    ("edx",&wparam(0));             # *ExceptionRecord
 442         &mov    ("ecx",&wparam(2));             # *ContextRecord
 443         &cmp    (&DWP(0,"edx"),0xC0000005)      # ExceptionRecord->ExceptionCode == STATUS_ACCESS_VIOLATION
 444         &jne    (&label("ret"));
 445         &add    (&DWP(184,"ecx"),4);            # skip over rep sha*
 446         &mov    ("eax",0);                      # ExceptionContinueExecution
 447 &set_label("ret");
 448         &ret    ();
 449 &function_end_B("_win32_segv_handler");
 450 &safeseh("_win32_segv_handler")                 if ($::win32);
 451
 452 &function_begin_B("padlock_sha1_oneshot");
 453         &push   ("edi");
 454         &push   ("esi");
 455         &xor    ("eax","eax");
 456         &mov    ("edi",&wparam(0));
 457         &mov    ("esi",&wparam(1));
 458         &mov    ("ecx",&wparam(2));
 459     if ($::win32 or $::coff) {
 460         &push   (&::islabel("_win32_segv_handler"));
 461         &data_byte(0x64,0xff,0x30);             # push  %fs:(%eax)
 462         &data_byte(0x64,0x89,0x20);             # mov   %esp,%fs:(%eax)
 463     }
 464         &mov    ("edx","esp");                  # put aside %esp
 465         &add    ("esp",-128);                   # 32 is enough but spec says 128
 466         &movups ("xmm0",&QWP(0,"edi"));         # copy-in context
 467         &and    ("esp",-16);
 468         &mov    ("eax",&DWP(16,"edi"));
 469         &movaps (&QWP(0,"esp"),"xmm0");
 470         &mov    ("edi","esp");
 471         &mov    (&DWP(16,"esp"),"eax");
 472         &xor    ("eax","eax");
 473         &data_byte(0xf3,0x0f,0xa6,0xc8);        # rep xsha1
 474         &movaps ("xmm0",&QWP(0,"esp"));
 475         &mov    ("eax",&DWP(16,"esp"));
 476         &mov    ("esp","edx");                  # restore %esp
 477     if ($::win32 or $::coff) {
 478         &data_byte(0x64,0x8f,0x05,0,0,0,0);     # pop   %fs:0
 479         &lea    ("esp",&DWP(4,"esp"));
 480     }
 481         &mov    ("edi",&wparam(0));
 482         &movups (&QWP(0,"edi"),"xmm0");         # copy-out context
 483         &mov    (&DWP(16,"edi"),"eax");
 484         &pop    ("esi");
 485         &pop    ("edi");
 486         &ret    ();
 487 &function_end_B("padlock_sha1_oneshot");
 488
 489 &function_begin_B("padlock_sha1_blocks");
 490         &push   ("edi");
 491         &push   ("esi");
 492         &mov    ("edi",&wparam(0));
 493         &mov    ("esi",&wparam(1));
 494         &mov    ("edx","esp");                  # put aside %esp
 495         &mov    ("ecx",&wparam(2));
 496         &add    ("esp",-128);
 497         &movups ("xmm0",&QWP(0,"edi"));         # copy-in context
 498         &and    ("esp",-16);
 499         &mov    ("eax",&DWP(16,"edi"));
 500         &movaps (&QWP(0,"esp"),"xmm0");
 501         &mov    ("edi","esp");
 502         &mov    (&DWP(16,"esp"),"eax");
 503         &mov    ("eax",-1);
 504         &data_byte(0xf3,0x0f,0xa6,0xc8);        # rep xsha1
 505         &movaps ("xmm0",&QWP(0,"esp"));
 506         &mov    ("eax",&DWP(16,"esp"));
 507         &mov    ("esp","edx");                  # restore %esp
 508         &mov    ("edi",&wparam(0));
 509         &movups (&QWP(0,"edi"),"xmm0");         # copy-out context
 510         &mov    (&DWP(16,"edi"),"eax");
 511         &pop    ("esi");
 512         &pop    ("edi");
 513         &ret    ();
 514 &function_end_B("padlock_sha1_blocks");
 515
 516 &function_begin_B("padlock_sha256_oneshot");
 517         &push   ("edi");
 518         &push   ("esi");
 519         &xor    ("eax","eax");
 520         &mov    ("edi",&wparam(0));
 521         &mov    ("esi",&wparam(1));
 522         &mov    ("ecx",&wparam(2));
 523     if ($::win32 or $::coff) {
 524         &push   (&::islabel("_win32_segv_handler"));
 525         &data_byte(0x64,0xff,0x30);             # push  %fs:(%eax)
 526         &data_byte(0x64,0x89,0x20);             # mov   %esp,%fs:(%eax)
 527     }
 528         &mov    ("edx","esp");                  # put aside %esp
 529         &add    ("esp",-128);
 530         &movups ("xmm0",&QWP(0,"edi"));         # copy-in context
 531         &and    ("esp",-16);
 532         &movups ("xmm1",&QWP(16,"edi"));
 533         &movaps (&QWP(0,"esp"),"xmm0");
 534         &mov    ("edi","esp");
 535         &movaps (&QWP(16,"esp"),"xmm1");
 536         &xor    ("eax","eax");
 537         &data_byte(0xf3,0x0f,0xa6,0xd0);        # rep xsha256
 538         &movaps ("xmm0",&QWP(0,"esp"));
 539         &movaps ("xmm1",&QWP(16,"esp"));
 540         &mov    ("esp","edx");                  # restore %esp
 541     if ($::win32 or $::coff) {
 542         &data_byte(0x64,0x8f,0x05,0,0,0,0);     # pop   %fs:0
 543         &lea    ("esp",&DWP(4,"esp"));
 544     }
 545         &mov    ("edi",&wparam(0));
 546         &movups (&QWP(0,"edi"),"xmm0");         # copy-out context
 547         &movups (&QWP(16,"edi"),"xmm1");
 548         &pop    ("esi");
 549         &pop    ("edi");
 550         &ret    ();
 551 &function_end_B("padlock_sha256_oneshot");
 552
 553 &function_begin_B("padlock_sha256_blocks");
 554         &push   ("edi");
 555         &push   ("esi");
 556         &mov    ("edi",&wparam(0));
 557         &mov    ("esi",&wparam(1));
 558         &mov    ("ecx",&wparam(2));
 559         &mov    ("edx","esp");                  # put aside %esp
 560         &add    ("esp",-128);
 561         &movups ("xmm0",&QWP(0,"edi"));         # copy-in context
 562         &and    ("esp",-16);
 563         &movups ("xmm1",&QWP(16,"edi"));
 564         &movaps (&QWP(0,"esp"),"xmm0");
 565         &mov    ("edi","esp");
 566         &movaps (&QWP(16,"esp"),"xmm1");
 567         &mov    ("eax",-1);
 568         &data_byte(0xf3,0x0f,0xa6,0xd0);        # rep xsha256
 569         &movaps ("xmm0",&QWP(0,"esp"));
 570         &movaps ("xmm1",&QWP(16,"esp"));
 571         &mov    ("esp","edx");                  # restore %esp
 572         &mov    ("edi",&wparam(0));
 573         &movups (&QWP(0,"edi"),"xmm0");         # copy-out context
 574         &movups (&QWP(16,"edi"),"xmm1");
 575         &pop    ("esi");
 576         &pop    ("edi");
 577         &ret    ();
 578 &function_end_B("padlock_sha256_blocks");
 579
 580 &function_begin_B("padlock_sha512_blocks");
 581         &push   ("edi");
 582         &push   ("esi");
 583         &mov    ("edi",&wparam(0));
 584         &mov    ("esi",&wparam(1));
 585         &mov    ("ecx",&wparam(2));
 586         &mov    ("edx","esp");                  # put aside %esp
 587         &add    ("esp",-128);
 588         &movups ("xmm0",&QWP(0,"edi"));         # copy-in context
 589         &and    ("esp",-16);
 590         &movups ("xmm1",&QWP(16,"edi"));
 591         &movups ("xmm2",&QWP(32,"edi"));
 592         &movups ("xmm3",&QWP(48,"edi"));
 593         &movaps (&QWP(0,"esp"),"xmm0");
 594         &mov    ("edi","esp");
 595         &movaps (&QWP(16,"esp"),"xmm1");
 596         &movaps (&QWP(32,"esp"),"xmm2");
 597         &movaps (&QWP(48,"esp"),"xmm3");
 598         &data_byte(0xf3,0x0f,0xa6,0xe0);        # rep xsha512
 599         &movaps ("xmm0",&QWP(0,"esp"));
 600         &movaps ("xmm1",&QWP(16,"esp"));
 601         &movaps ("xmm2",&QWP(32,"esp"));
 602         &movaps ("xmm3",&QWP(48,"esp"));
 603         &mov    ("esp","edx");                  # restore %esp
 604         &mov    ("edi",&wparam(0));
 605         &movups (&QWP(0,"edi"),"xmm0");         # copy-out context
 606         &movups (&QWP(16,"edi"),"xmm1");
 607         &movups (&QWP(32,"edi"),"xmm2");
 608         &movups (&QWP(48,"edi"),"xmm3");
 609         &pop    ("esi");
 610         &pop    ("edi");
 611         &ret    ();
 612 &function_end_B("padlock_sha512_blocks");
 613
 614 &asciz  ("VIA Padlock x86 module, CRYPTOGAMS by <appro\@openssl.org>");
 615 &align  (16);
 616
 617 &dataseg();
 618 # Essentially this variable belongs in thread local storage.
 619 # Having this variable global on the other hand can only cause
 620 # few bogus key reloads [if any at all on signle-CPU system],
 621 # so we accept the penalty...
 622 &set_label("padlock_saved_context",4);
 623 &data_word(0);
 624
 625 &asm_finish();
 626
 627 close STDOUT;