engines/asm/e_padlock-x86.pl

   1 #! /usr/bin/env perl
   2 # Copyright 2011-2018 The OpenSSL Project Authors. All Rights Reserved.
   3 #
   4 # Licensed under the Apache License 2.0 (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 $output=pop and open STDOUT,">$output";
  46
  47 &asm_init($ARGV[0]);
  48
  49 %PADLOCK_PREFETCH=(ecb=>128, cbc=>64);  # prefetch errata
  50 $PADLOCK_CHUNK=512;     # Must be a power of 2 larger than 16
  51
  52 $ctx="edx";
  53 $out="edi";
  54 $inp="esi";
  55 $len="ecx";
  56 $chunk="ebx";
  57
  58 &function_begin_B("padlock_capability");
  59         &push   ("ebx");
  60         &pushf  ();
  61         &pop    ("eax");
  62         &mov    ("ecx","eax");
  63         &xor    ("eax",1<<21);
  64         &push   ("eax");
  65         &popf   ();
  66         &pushf  ();
  67         &pop    ("eax");
  68         &xor    ("ecx","eax");
  69         &xor    ("eax","eax");
  70         &bt     ("ecx",21);
  71         &jnc    (&label("noluck"));
  72         &cpuid  ();
  73         &xor    ("eax","eax");
  74         &cmp    ("ebx","0x".unpack("H*",'tneC'));
  75         &jne    (&label("zhaoxin"));
  76         &cmp    ("edx","0x".unpack("H*",'Hrua'));
  77         &jne    (&label("noluck"));
  78         &cmp    ("ecx","0x".unpack("H*",'slua'));
  79         &jne    (&label("noluck"));
  80         &jmp    (&label("zhaoxinEnd"));
  81 &set_label("zhaoxin");
  82         &cmp    ("ebx","0x".unpack("H*",'hS  '));
  83         &jne    (&label("noluck"));
  84         &cmp    ("edx","0x".unpack("H*",'hgna'));
  85         &jne    (&label("noluck"));
  86         &cmp    ("ecx","0x".unpack("H*",'  ia'));
  87         &jne    (&label("noluck"));
  88 &set_label("zhaoxinEnd");
  89         &mov    ("eax",0xC0000000);
  90         &cpuid  ();
  91         &mov    ("edx","eax");
  92         &xor    ("eax","eax");
  93         &cmp    ("edx",0xC0000001);
  94         &jb     (&label("noluck"));
  95         &mov    ("eax",1);
  96         &cpuid  ();
  97         &or     ("eax",0x0f);
  98         &xor    ("ebx","ebx");
  99         &and    ("eax",0x0fff);
 100         &cmp    ("eax",0x06ff);         # check for Nano
 101         &sete   ("bl");
 102         &mov    ("eax",0xC0000001);
 103         &push   ("ebx");
 104         &cpuid  ();
 105         &pop    ("ebx");
 106         &mov    ("eax","edx");
 107         &shl    ("ebx",4);              # bit#4 denotes Nano
 108         &and    ("eax",0xffffffef);
 109         &or     ("eax","ebx")
 110 &set_label("noluck");
 111         &pop    ("ebx");
 112         &ret    ();
 113 &function_end_B("padlock_capability")
 114
 115 &function_begin_B("padlock_key_bswap");
 116         &mov    ("edx",&wparam(0));
 117         &mov    ("ecx",&DWP(240,"edx"));
 118 &set_label("bswap_loop");
 119         &mov    ("eax",&DWP(0,"edx"));
 120         &bswap  ("eax");
 121         &mov    (&DWP(0,"edx"),"eax");
 122         &lea    ("edx",&DWP(4,"edx"));
 123         &sub    ("ecx",1);
 124         &jnz    (&label("bswap_loop"));
 125         &ret    ();
 126 &function_end_B("padlock_key_bswap");
 127
 128 # This is heuristic key context tracing. At first one
 129 # believes that one should use atomic swap instructions,
 130 # but it's not actually necessary. Point is that if
 131 # padlock_saved_context was changed by another thread
 132 # after we've read it and before we compare it with ctx,
 133 # our key *shall* be reloaded upon thread context switch
 134 # and we are therefore set in either case...
 135 &static_label("padlock_saved_context");
 136
 137 &function_begin_B("padlock_verify_context");
 138         &mov    ($ctx,&wparam(0));
 139         &lea    ("eax",($::win32 or $::coff) ? &DWP(&label("padlock_saved_context")) :
 140                        &DWP(&label("padlock_saved_context")."-".&label("verify_pic_point")));
 141         &pushf  ();
 142         &call   ("_padlock_verify_ctx");
 143 &set_label("verify_pic_point");
 144         &lea    ("esp",&DWP(4,"esp"));
 145         &ret    ();
 146 &function_end_B("padlock_verify_context");
 147
 148 &function_begin_B("_padlock_verify_ctx");
 149         &add    ("eax",&DWP(0,"esp")) if(!($::win32 or $::coff));# &padlock_saved_context
 150         &bt     (&DWP(4,"esp"),30);             # eflags
 151         &jnc    (&label("verified"));
 152         &cmp    ($ctx,&DWP(0,"eax"));
 153         &je     (&label("verified"));
 154         &pushf  ();
 155         &popf   ();
 156 &set_label("verified");
 157         &mov    (&DWP(0,"eax"),$ctx);
 158         &ret    ();
 159 &function_end_B("_padlock_verify_ctx");
 160
 161 &function_begin_B("padlock_reload_key");
 162         &pushf  ();
 163         &popf   ();
 164         &ret    ();
 165 &function_end_B("padlock_reload_key");
 166
 167 &function_begin_B("padlock_aes_block");
 168         &push   ("edi");
 169         &push   ("esi");
 170         &push   ("ebx");
 171         &mov    ($out,&wparam(0));              # must be 16-byte aligned
 172         &mov    ($inp,&wparam(1));              # must be 16-byte aligned
 173         &mov    ($ctx,&wparam(2));
 174         &mov    ($len,1);
 175         &lea    ("ebx",&DWP(32,$ctx));          # key
 176         &lea    ($ctx,&DWP(16,$ctx));           # control word
 177         &data_byte(0xf3,0x0f,0xa7,0xc8);        # rep xcryptecb
 178         &pop    ("ebx");
 179         &pop    ("esi");
 180         &pop    ("edi");
 181         &ret    ();
 182 &function_end_B("padlock_aes_block");
 183
 184 sub generate_mode {
 185 my ($mode,$opcode) = @_;
 186 # int padlock_$mode_encrypt(void *out, const void *inp,
 187 #               struct padlock_cipher_data *ctx, size_t len);
 188 &function_begin("padlock_${mode}_encrypt");
 189         &mov    ($out,&wparam(0));
 190         &mov    ($inp,&wparam(1));
 191         &mov    ($ctx,&wparam(2));
 192         &mov    ($len,&wparam(3));
 193         &test   ($ctx,15);
 194         &jnz    (&label("${mode}_abort"));
 195         &test   ($len,15);
 196         &jnz    (&label("${mode}_abort"));
 197         &lea    ("eax",($::win32 or $::coff) ? &DWP(&label("padlock_saved_context")) :
 198                        &DWP(&label("padlock_saved_context")."-".&label("${mode}_pic_point")));
 199         &pushf  ();
 200         &cld    ();
 201         &call   ("_padlock_verify_ctx");
 202 &set_label("${mode}_pic_point");
 203         &lea    ($ctx,&DWP(16,$ctx));   # control word
 204         &xor    ("eax","eax");
 205                                         if ($mode eq "ctr32") {
 206         &movq   ("mm0",&QWP(-16,$ctx)); # load [upper part of] counter
 207                                         } else {
 208         &xor    ("ebx","ebx");
 209         &test   (&DWP(0,$ctx),1<<5);    # align bit in control word
 210         &jnz    (&label("${mode}_aligned"));
 211         &test   ($out,0x0f);
 212         &setz   ("al");                 # !out_misaligned
 213         &test   ($inp,0x0f);
 214         &setz   ("bl");                 # !inp_misaligned
 215         &test   ("eax","ebx");
 216         &jnz    (&label("${mode}_aligned"));
 217         &neg    ("eax");
 218                                         }
 219         &mov    ($chunk,$PADLOCK_CHUNK);
 220         &not    ("eax");                # out_misaligned?-1:0
 221         &lea    ("ebp",&DWP(-24,"esp"));
 222         &cmp    ($len,$chunk);
 223         &cmovc  ($chunk,$len);          # chunk=len>PADLOCK_CHUNK?PADLOCK_CHUNK:len
 224         &and    ("eax",$chunk);         # out_misaligned?chunk:0
 225         &mov    ($chunk,$len);
 226         &neg    ("eax");
 227         &and    ($chunk,$PADLOCK_CHUNK-1);      # chunk=len%PADLOCK_CHUNK
 228         &lea    ("esp",&DWP(0,"eax","ebp"));    # alloca
 229         &mov    ("eax",$PADLOCK_CHUNK);
 230         &cmovz  ($chunk,"eax");                 # chunk=chunk?:PADLOCK_CHUNK
 231         &mov    ("eax","ebp");
 232         &and    ("ebp",-16);
 233         &and    ("esp",-16);
 234         &mov    (&DWP(16,"ebp"),"eax");
 235     if ($PADLOCK_PREFETCH{$mode}) {
 236         &cmp    ($len,$chunk);
 237         &ja     (&label("${mode}_loop"));
 238         &mov    ("eax",$inp);           # check if prefetch crosses page
 239         &cmp    ("ebp","esp");
 240         &cmove  ("eax",$out);
 241         &add    ("eax",$len);
 242         &neg    ("eax");
 243         &and    ("eax",0xfff);          # distance to page boundary
 244         &cmp    ("eax",$PADLOCK_PREFETCH{$mode});
 245         &mov    ("eax",-$PADLOCK_PREFETCH{$mode});
 246         &cmovae ("eax",$chunk);         # mask=distance<prefetch?-prefetch:-1
 247         &and    ($chunk,"eax");
 248         &jz     (&label("${mode}_unaligned_tail"));
 249     }
 250         &jmp    (&label("${mode}_loop"));
 251
 252 &set_label("${mode}_loop",16);
 253         &mov    (&DWP(0,"ebp"),$out);           # save parameters
 254         &mov    (&DWP(4,"ebp"),$inp);
 255         &mov    (&DWP(8,"ebp"),$len);
 256         &mov    ($len,$chunk);
 257         &mov    (&DWP(12,"ebp"),$chunk);        # chunk
 258                                                 if ($mode eq "ctr32") {
 259         &mov    ("ecx",&DWP(-4,$ctx));
 260         &xor    ($out,$out);
 261         &mov    ("eax",&DWP(-8,$ctx));          # borrow $len
 262 &set_label("${mode}_prepare");
 263         &mov    (&DWP(12,"esp",$out),"ecx");
 264         &bswap  ("ecx");
 265         &movq   (&QWP(0,"esp",$out),"mm0");
 266         &inc    ("ecx");
 267         &mov    (&DWP(8,"esp",$out),"eax");
 268         &bswap  ("ecx");
 269         &lea    ($out,&DWP(16,$out));
 270         &cmp    ($out,$chunk);
 271         &jb     (&label("${mode}_prepare"));
 272
 273         &mov    (&DWP(-4,$ctx),"ecx");
 274         &lea    ($inp,&DWP(0,"esp"));
 275         &lea    ($out,&DWP(0,"esp"));
 276         &mov    ($len,$chunk);
 277                                                 } else {
 278         &test   ($out,0x0f);                    # out_misaligned
 279         &cmovnz ($out,"esp");
 280         &test   ($inp,0x0f);                    # inp_misaligned
 281         &jz     (&label("${mode}_inp_aligned"));
 282         &shr    ($len,2);
 283         &data_byte(0xf3,0xa5);                  # rep movsl
 284         &sub    ($out,$chunk);
 285         &mov    ($len,$chunk);
 286         &mov    ($inp,$out);
 287 &set_label("${mode}_inp_aligned");
 288                                                 }
 289         &lea    ("eax",&DWP(-16,$ctx));         # ivp
 290         &lea    ("ebx",&DWP(16,$ctx));          # key
 291         &shr    ($len,4);                       # len/=AES_BLOCK_SIZE
 292         &data_byte(0xf3,0x0f,0xa7,$opcode);     # rep xcrypt*
 293                                                 if ($mode !~ /ecb|ctr/) {
 294         &movaps ("xmm0",&QWP(0,"eax"));
 295         &movaps (&QWP(-16,$ctx),"xmm0");        # copy [or refresh] iv
 296                                                 }
 297         &mov    ($out,&DWP(0,"ebp"));           # restore parameters
 298         &mov    ($chunk,&DWP(12,"ebp"));
 299                                                 if ($mode eq "ctr32") {
 300         &mov    ($inp,&DWP(4,"ebp"));
 301         &xor    ($len,$len);
 302 &set_label("${mode}_xor");
 303         &movups ("xmm1",&QWP(0,$inp,$len));
 304         &lea    ($len,&DWP(16,$len));
 305         &pxor   ("xmm1",&QWP(-16,"esp",$len));
 306         &movups (&QWP(-16,$out,$len),"xmm1");
 307         &cmp    ($len,$chunk);
 308         &jb     (&label("${mode}_xor"));
 309                                                 } else {
 310         &test   ($out,0x0f);
 311         &jz     (&label("${mode}_out_aligned"));
 312         &mov    ($len,$chunk);
 313         &lea    ($inp,&DWP(0,"esp"));
 314         &shr    ($len,2);
 315         &data_byte(0xf3,0xa5);                  # rep movsl
 316         &sub    ($out,$chunk);
 317 &set_label("${mode}_out_aligned");
 318         &mov    ($inp,&DWP(4,"ebp"));
 319                                                 }
 320         &mov    ($len,&DWP(8,"ebp"));
 321         &add    ($out,$chunk);
 322         &add    ($inp,$chunk);
 323         &sub    ($len,$chunk);
 324         &mov    ($chunk,$PADLOCK_CHUNK);
 325     if (!$PADLOCK_PREFETCH{$mode}) {
 326         &jnz    (&label("${mode}_loop"));
 327     } else {
 328         &jz     (&label("${mode}_break"));
 329         &cmp    ($len,$chunk);
 330         &jae    (&label("${mode}_loop"));
 331
 332 &set_label("${mode}_unaligned_tail");
 333         &xor    ("eax","eax");
 334         &cmp    ("esp","ebp");
 335         &cmove  ("eax",$len);
 336         &sub    ("esp","eax");                  # alloca
 337         &mov    ("eax", $out);                  # save parameters
 338         &mov    ($chunk,$len);
 339         &shr    ($len,2);
 340         &lea    ($out,&DWP(0,"esp"));
 341         &data_byte(0xf3,0xa5);                  # rep movsl
 342         &mov    ($inp,"esp");
 343         &mov    ($out,"eax");                   # restore parameters
 344         &mov    ($len,$chunk);
 345         &jmp    (&label("${mode}_loop"));
 346
 347 &set_label("${mode}_break",16);
 348     }
 349                                                 if ($mode ne "ctr32") {
 350         &cmp    ("esp","ebp");
 351         &je     (&label("${mode}_done"));
 352                                                 }
 353         &pxor   ("xmm0","xmm0");
 354         &lea    ("eax",&DWP(0,"esp"));
 355 &set_label("${mode}_bzero");
 356         &movaps (&QWP(0,"eax"),"xmm0");
 357         &lea    ("eax",&DWP(16,"eax"));
 358         &cmp    ("ebp","eax");
 359         &ja     (&label("${mode}_bzero"));
 360
 361 &set_label("${mode}_done");
 362         &mov    ("ebp",&DWP(16,"ebp"));
 363         &lea    ("esp",&DWP(24,"ebp"));
 364                                                 if ($mode ne "ctr32") {
 365         &jmp    (&label("${mode}_exit"));
 366
 367 &set_label("${mode}_aligned",16);
 368     if ($PADLOCK_PREFETCH{$mode}) {
 369         &lea    ("ebp",&DWP(0,$inp,$len));
 370         &neg    ("ebp");
 371         &and    ("ebp",0xfff);                  # distance to page boundary
 372         &xor    ("eax","eax");
 373         &cmp    ("ebp",$PADLOCK_PREFETCH{$mode});
 374         &mov    ("ebp",$PADLOCK_PREFETCH{$mode}-1);
 375         &cmovae ("ebp","eax");
 376         &and    ("ebp",$len);                   # remainder
 377         &sub    ($len,"ebp");
 378         &jz     (&label("${mode}_aligned_tail"));
 379     }
 380         &lea    ("eax",&DWP(-16,$ctx));         # ivp
 381         &lea    ("ebx",&DWP(16,$ctx));          # key
 382         &shr    ($len,4);                       # len/=AES_BLOCK_SIZE
 383         &data_byte(0xf3,0x0f,0xa7,$opcode);     # rep xcrypt*
 384                                                 if ($mode ne "ecb") {
 385         &movaps ("xmm0",&QWP(0,"eax"));
 386         &movaps (&QWP(-16,$ctx),"xmm0");        # copy [or refresh] iv
 387                                                 }
 388     if ($PADLOCK_PREFETCH{$mode}) {
 389         &test   ("ebp","ebp");
 390         &jz     (&label("${mode}_exit"));
 391
 392 &set_label("${mode}_aligned_tail");
 393         &mov    ($len,"ebp");
 394         &lea    ("ebp",&DWP(-24,"esp"));
 395         &mov    ("esp","ebp");
 396         &mov    ("eax","ebp");
 397         &sub    ("esp",$len);
 398         &and    ("ebp",-16);
 399         &and    ("esp",-16);
 400         &mov    (&DWP(16,"ebp"),"eax");
 401         &mov    ("eax", $out);                  # save parameters
 402         &mov    ($chunk,$len);
 403         &shr    ($len,2);
 404         &lea    ($out,&DWP(0,"esp"));
 405         &data_byte(0xf3,0xa5);                  # rep movsl
 406         &mov    ($inp,"esp");
 407         &mov    ($out,"eax");                   # restore parameters
 408         &mov    ($len,$chunk);
 409         &jmp    (&label("${mode}_loop"));
 410     }
 411 &set_label("${mode}_exit");                     }
 412         &mov    ("eax",1);
 413         &lea    ("esp",&DWP(4,"esp"));          # popf
 414         &emms   ()                              if ($mode eq "ctr32");
 415 &set_label("${mode}_abort");
 416 &function_end("padlock_${mode}_encrypt");
 417 }
 418
 419 &generate_mode("ecb",0xc8);
 420 &generate_mode("cbc",0xd0);
 421 &generate_mode("cfb",0xe0);
 422 &generate_mode("ofb",0xe8);
 423 &generate_mode("ctr32",0xc8);   # yes, it implements own CTR with ECB opcode,
 424                                 # because hardware CTR was introduced later
 425                                 # and even has errata on certain C7 stepping.
 426                                 # own implementation *always* works, though
 427                                 # ~15% slower than dedicated hardware...
 428
 429 &function_begin_B("padlock_xstore");
 430         &push   ("edi");
 431         &mov    ("edi",&wparam(0));
 432         &mov    ("edx",&wparam(1));
 433         &data_byte(0x0f,0xa7,0xc0);             # xstore
 434         &pop    ("edi");
 435         &ret    ();
 436 &function_end_B("padlock_xstore");
 437
 438 &function_begin_B("_win32_segv_handler");
 439         &mov    ("eax",1);                      # ExceptionContinueSearch
 440         &mov    ("edx",&wparam(0));             # *ExceptionRecord
 441         &mov    ("ecx",&wparam(2));             # *ContextRecord
 442         &cmp    (&DWP(0,"edx"),0xC0000005)      # ExceptionRecord->ExceptionCode == STATUS_ACCESS_VIOLATION
 443         &jne    (&label("ret"));
 444         &add    (&DWP(184,"ecx"),4);            # skip over rep sha*
 445         &mov    ("eax",0);                      # ExceptionContinueExecution
 446 &set_label("ret");
 447         &ret    ();
 448 &function_end_B("_win32_segv_handler");
 449 &safeseh("_win32_segv_handler")                 if ($::win32);
 450
 451 &function_begin_B("padlock_sha1_oneshot");
 452         &push   ("edi");
 453         &push   ("esi");
 454         &xor    ("eax","eax");
 455         &mov    ("edi",&wparam(0));
 456         &mov    ("esi",&wparam(1));
 457         &mov    ("ecx",&wparam(2));
 458     if ($::win32 or $::coff) {
 459         &push   (&::islabel("_win32_segv_handler"));
 460         &data_byte(0x64,0xff,0x30);             # push  %fs:(%eax)
 461         &data_byte(0x64,0x89,0x20);             # mov   %esp,%fs:(%eax)
 462     }
 463         &mov    ("edx","esp");                  # put aside %esp
 464         &add    ("esp",-128);                   # 32 is enough but spec says 128
 465         &movups ("xmm0",&QWP(0,"edi"));         # copy-in context
 466         &and    ("esp",-16);
 467         &mov    ("eax",&DWP(16,"edi"));
 468         &movaps (&QWP(0,"esp"),"xmm0");
 469         &mov    ("edi","esp");
 470         &mov    (&DWP(16,"esp"),"eax");
 471         &xor    ("eax","eax");
 472         &data_byte(0xf3,0x0f,0xa6,0xc8);        # rep xsha1
 473         &movaps ("xmm0",&QWP(0,"esp"));
 474         &mov    ("eax",&DWP(16,"esp"));
 475         &mov    ("esp","edx");                  # restore %esp
 476     if ($::win32 or $::coff) {
 477         &data_byte(0x64,0x8f,0x05,0,0,0,0);     # pop   %fs:0
 478         &lea    ("esp",&DWP(4,"esp"));
 479     }
 480         &mov    ("edi",&wparam(0));
 481         &movups (&QWP(0,"edi"),"xmm0");         # copy-out context
 482         &mov    (&DWP(16,"edi"),"eax");
 483         &pop    ("esi");
 484         &pop    ("edi");
 485         &ret    ();
 486 &function_end_B("padlock_sha1_oneshot");
 487
 488 &function_begin_B("padlock_sha1_blocks");
 489         &push   ("edi");
 490         &push   ("esi");
 491         &mov    ("edi",&wparam(0));
 492         &mov    ("esi",&wparam(1));
 493         &mov    ("edx","esp");                  # put aside %esp
 494         &mov    ("ecx",&wparam(2));
 495         &add    ("esp",-128);
 496         &movups ("xmm0",&QWP(0,"edi"));         # copy-in context
 497         &and    ("esp",-16);
 498         &mov    ("eax",&DWP(16,"edi"));
 499         &movaps (&QWP(0,"esp"),"xmm0");
 500         &mov    ("edi","esp");
 501         &mov    (&DWP(16,"esp"),"eax");
 502         &mov    ("eax",-1);
 503         &data_byte(0xf3,0x0f,0xa6,0xc8);        # rep xsha1
 504         &movaps ("xmm0",&QWP(0,"esp"));
 505         &mov    ("eax",&DWP(16,"esp"));
 506         &mov    ("esp","edx");                  # restore %esp
 507         &mov    ("edi",&wparam(0));
 508         &movups (&QWP(0,"edi"),"xmm0");         # copy-out context
 509         &mov    (&DWP(16,"edi"),"eax");
 510         &pop    ("esi");
 511         &pop    ("edi");
 512         &ret    ();
 513 &function_end_B("padlock_sha1_blocks");
 514
 515 &function_begin_B("padlock_sha256_oneshot");
 516         &push   ("edi");
 517         &push   ("esi");
 518         &xor    ("eax","eax");
 519         &mov    ("edi",&wparam(0));
 520         &mov    ("esi",&wparam(1));
 521         &mov    ("ecx",&wparam(2));
 522     if ($::win32 or $::coff) {
 523         &push   (&::islabel("_win32_segv_handler"));
 524         &data_byte(0x64,0xff,0x30);             # push  %fs:(%eax)
 525         &data_byte(0x64,0x89,0x20);             # mov   %esp,%fs:(%eax)
 526     }
 527         &mov    ("edx","esp");                  # put aside %esp
 528         &add    ("esp",-128);
 529         &movups ("xmm0",&QWP(0,"edi"));         # copy-in context
 530         &and    ("esp",-16);
 531         &movups ("xmm1",&QWP(16,"edi"));
 532         &movaps (&QWP(0,"esp"),"xmm0");
 533         &mov    ("edi","esp");
 534         &movaps (&QWP(16,"esp"),"xmm1");
 535         &xor    ("eax","eax");
 536         &data_byte(0xf3,0x0f,0xa6,0xd0);        # rep xsha256
 537         &movaps ("xmm0",&QWP(0,"esp"));
 538         &movaps ("xmm1",&QWP(16,"esp"));
 539         &mov    ("esp","edx");                  # restore %esp
 540     if ($::win32 or $::coff) {
 541         &data_byte(0x64,0x8f,0x05,0,0,0,0);     # pop   %fs:0
 542         &lea    ("esp",&DWP(4,"esp"));
 543     }
 544         &mov    ("edi",&wparam(0));
 545         &movups (&QWP(0,"edi"),"xmm0");         # copy-out context
 546         &movups (&QWP(16,"edi"),"xmm1");
 547         &pop    ("esi");
 548         &pop    ("edi");
 549         &ret    ();
 550 &function_end_B("padlock_sha256_oneshot");
 551
 552 &function_begin_B("padlock_sha256_blocks");
 553         &push   ("edi");
 554         &push   ("esi");
 555         &mov    ("edi",&wparam(0));
 556         &mov    ("esi",&wparam(1));
 557         &mov    ("ecx",&wparam(2));
 558         &mov    ("edx","esp");                  # put aside %esp
 559         &add    ("esp",-128);
 560         &movups ("xmm0",&QWP(0,"edi"));         # copy-in context
 561         &and    ("esp",-16);
 562         &movups ("xmm1",&QWP(16,"edi"));
 563         &movaps (&QWP(0,"esp"),"xmm0");
 564         &mov    ("edi","esp");
 565         &movaps (&QWP(16,"esp"),"xmm1");
 566         &mov    ("eax",-1);
 567         &data_byte(0xf3,0x0f,0xa6,0xd0);        # rep xsha256
 568         &movaps ("xmm0",&QWP(0,"esp"));
 569         &movaps ("xmm1",&QWP(16,"esp"));
 570         &mov    ("esp","edx");                  # restore %esp
 571         &mov    ("edi",&wparam(0));
 572         &movups (&QWP(0,"edi"),"xmm0");         # copy-out context
 573         &movups (&QWP(16,"edi"),"xmm1");
 574         &pop    ("esi");
 575         &pop    ("edi");
 576         &ret    ();
 577 &function_end_B("padlock_sha256_blocks");
 578
 579 &function_begin_B("padlock_sha512_blocks");
 580         &push   ("edi");
 581         &push   ("esi");
 582         &mov    ("edi",&wparam(0));
 583         &mov    ("esi",&wparam(1));
 584         &mov    ("ecx",&wparam(2));
 585         &mov    ("edx","esp");                  # put aside %esp
 586         &add    ("esp",-128);
 587         &movups ("xmm0",&QWP(0,"edi"));         # copy-in context
 588         &and    ("esp",-16);
 589         &movups ("xmm1",&QWP(16,"edi"));
 590         &movups ("xmm2",&QWP(32,"edi"));
 591         &movups ("xmm3",&QWP(48,"edi"));
 592         &movaps (&QWP(0,"esp"),"xmm0");
 593         &mov    ("edi","esp");
 594         &movaps (&QWP(16,"esp"),"xmm1");
 595         &movaps (&QWP(32,"esp"),"xmm2");
 596         &movaps (&QWP(48,"esp"),"xmm3");
 597         &data_byte(0xf3,0x0f,0xa6,0xe0);        # rep xsha512
 598         &movaps ("xmm0",&QWP(0,"esp"));
 599         &movaps ("xmm1",&QWP(16,"esp"));
 600         &movaps ("xmm2",&QWP(32,"esp"));
 601         &movaps ("xmm3",&QWP(48,"esp"));
 602         &mov    ("esp","edx");                  # restore %esp
 603         &mov    ("edi",&wparam(0));
 604         &movups (&QWP(0,"edi"),"xmm0");         # copy-out context
 605         &movups (&QWP(16,"edi"),"xmm1");
 606         &movups (&QWP(32,"edi"),"xmm2");
 607         &movups (&QWP(48,"edi"),"xmm3");
 608         &pop    ("esi");
 609         &pop    ("edi");
 610         &ret    ();
 611 &function_end_B("padlock_sha512_blocks");
 612
 613 &asciz  ("VIA Padlock x86 module, CRYPTOGAMS by <appro\@openssl.org>");
 614 &align  (16);
 615
 616 &dataseg();
 617 # Essentially this variable belongs in thread local storage.
 618 # Having this variable global on the other hand can only cause
 619 # few bogus key reloads [if any at all on signle-CPU system],
 620 # so we accept the penalty...
 621 &set_label("padlock_saved_context",4);
 622 &data_word(0);
 623
 624 &asm_finish();
 625
 626 close STDOUT;