1 #!/usr/bin/env perl
   2 #
   3 # ====================================================================
   4 # Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
   5 # project. Rights for redistribution and usage in source and binary
   6 # forms are granted according to the OpenSSL license.
   7 # ====================================================================
   8 #
   9 # sha256/512_block procedure for x86_64.
  10 #
  11 # 40% improvement over compiler-generated code on Opteron. On EM64T
  12 # sha256 was observed to run >80% faster and sha512 - >40%. No magical
  13 # tricks, just straight implementation... I really wonder why gcc
  14 # [being armed with inline assembler] fails to generate as fast code.
  15 # The only thing which is cool about this module is that it's very
  16 # same instruction sequence used for both SHA-256 and SHA-512. In
  17 # former case the instructions operate on 32-bit operands, while in
  18 # latter - on 64-bit ones. All I had to do is to get one flavor right,
  19 # the other one passed the test right away:-)
  20 #
  21 # sha256_block runs in ~1005 cycles on Opteron, which gives you
  22 # asymptotic performance of 64*1000/1005=63.7MBps times CPU clock
  23 # frequency in GHz. sha512_block runs in ~1275 cycles, which results
  24 # in 128*1000/1275=100MBps per GHz. Is there room for improvement?
  25 # Well, if you compare it to IA-64 implementation, which maintains
  26 # X[16] in register bank[!], tends to 4 instructions per CPU clock
  27 # cycle and runs in 1003 cycles, 1275 is very good result for 3-way
  28 # issue Opteron pipeline and X[16] maintained in memory. So that *if*
  29 # there is a way to improve it, *then* the only way would be to try to
  30 # offload X[16] updates to SSE unit, but that would require "deeper"
  31 # loop unroll, which in turn would naturally cause size blow-up, not
  32 # to mention increased complexity! And once again, only *if* it's
  33 # actually possible to noticeably improve overall ILP, instruction
  34 # level parallelism, on a given CPU implementation in this case.
  35 #
  36 # Special note on Intel EM64T. While Opteron CPU exhibits perfect
  37 # perfromance ratio of 1.5 between 64- and 32-bit flavors [see above],
  38 # [currently available] EM64T CPUs apparently are far from it. On the
  39 # contrary, 64-bit version, sha512_block, is ~30% *slower* than 32-bit
  40 # sha256_block:-( This is presumably because 64-bit shifts/rotates
  41 # apparently are not atomic instructions, but implemented in microcode.
  42 
  43 $flavour = shift;
  44 $output  = shift;
  45 if ($flavour =~ /\./) { $output = $flavour; undef $flavour; }
  46 
  47 $win64=0; $win64=1 if ($flavour =~ /[nm]asm|mingw64/ || $output =~ /\.asm$/);
  48 
  49 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  50 ( $xlate="${dir}x86_64-xlate.pl" and -f $xlate ) or
  51 ( $xlate="${dir}../../perlasm/x86_64-xlate.pl" and -f $xlate) or
  52 die "can't locate x86_64-xlate.pl";
  53 
  54 open OUT,"| \"$^X\" $xlate $flavour $output";
  55 *STDOUT=*OUT;
  56 
  57 if ($output =~ /512/) {
  58         $func="sha512_block_data_order";
  59         $TABLE="K512";
  60         $SZ=8;
  61         @ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%rax","%rbx","%rcx","%rdx",
  62                                         "%r8", "%r9", "%r10","%r11");
  63         ($T1,$a0,$a1,$a2)=("%r12","%r13","%r14","%r15");
  64         @Sigma0=(28,34,39);
  65         @Sigma1=(14,18,41);
  66         @sigma0=(1,  8, 7);
  67         @sigma1=(19,61, 6);
  68         $rounds=80;
  69 } else {
  70         $func="sha256_block_data_order";
  71         $TABLE="K256";
  72         $SZ=4;
  73         @ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%eax","%ebx","%ecx","%edx",
  74                                         "%r8d","%r9d","%r10d","%r11d");
  75         ($T1,$a0,$a1,$a2)=("%r12d","%r13d","%r14d","%r15d");
  76         @Sigma0=( 2,13,22);
  77         @Sigma1=( 6,11,25);
  78         @sigma0=( 7,18, 3);
  79         @sigma1=(17,19,10);
  80         $rounds=64;
  81 }
  82 
  83 $ctx="%rdi";    # 1st arg
  84 $round="%rdi";  # zaps $ctx
  85 $inp="%rsi";    # 2nd arg
  86 $Tbl="%rbp";
  87 
  88 $_ctx="16*$SZ+0*8(%rsp)";
  89 $_inp="16*$SZ+1*8(%rsp)";
  90 $_end="16*$SZ+2*8(%rsp)";
  91 $_rsp="16*$SZ+3*8(%rsp)";
  92 $framesz="16*$SZ+4*8";
  93 
  94 
  95 sub ROUND_00_15()
  96 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;
  97 
  98 $code.=<<___;
  99         ror     \$`$Sigma1[2]-$Sigma1[1]`,$a0
 100         mov     $f,$a2
 101         mov     $T1,`$SZ*($i&0xf)`(%rsp)
 102 
 103         ror     \$`$Sigma0[2]-$Sigma0[1]`,$a1
 104         xor     $e,$a0
 105         xor     $g,$a2                  # f^g
 106 
 107         ror     \$`$Sigma1[1]-$Sigma1[0]`,$a0
 108         add     $h,$T1                  # T1+=h
 109         xor     $a,$a1
 110 
 111         add     ($Tbl,$round,$SZ),$T1   # T1+=K[round]
 112         and     $e,$a2                  # (f^g)&e
 113         mov     $b,$h
 114 
 115         ror     \$`$Sigma0[1]-$Sigma0[0]`,$a1
 116         xor     $e,$a0
 117         xor     $g,$a2                  # Ch(e,f,g)=((f^g)&e)^g
 118 
 119         xor     $c,$h                   # b^c
 120         xor     $a,$a1
 121         add     $a2,$T1                 # T1+=Ch(e,f,g)
 122         mov     $b,$a2
 123 
 124         ror     \$$Sigma1[0],$a0        # Sigma1(e)
 125         and     $a,$h                   # h=(b^c)&a
 126         and     $c,$a2                  # b&c
 127 
 128         ror     \$$Sigma0[0],$a1        # Sigma0(a)
 129         add     $a0,$T1                 # T1+=Sigma1(e)
 130         add     $a2,$h                  # h+=b&c (completes +=Maj(a,b,c)
 131 
 132         add     $T1,$d                  # d+=T1
 133         add     $T1,$h                  # h+=T1
 134         lea     1($round),$round        # round++
 135         add     $a1,$h                  # h+=Sigma0(a)
 136 
 137 ___
 138 }
 139 
 140 sub ROUND_16_XX()
 141 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;
 142 
 143 $code.=<<___;
 144         mov     `$SZ*(($i+1)&0xf)`(%rsp),$a0
 145         mov     `$SZ*(($i+14)&0xf)`(%rsp),$a1
 146         mov     $a0,$T1
 147         mov     $a1,$a2
 148 
 149         ror     \$`$sigma0[1]-$sigma0[0]`,$T1
 150         xor     $a0,$T1
 151         shr     \$$sigma0[2],$a0
 152 
 153         ror     \$$sigma0[0],$T1
 154         xor     $T1,$a0                 # sigma0(X[(i+1)&0xf])
 155         mov     `$SZ*(($i+9)&0xf)`(%rsp),$T1
 156 
 157         ror     \$`$sigma1[1]-$sigma1[0]`,$a2
 158         xor     $a1,$a2
 159         shr     \$$sigma1[2],$a1
 160 
 161         ror     \$$sigma1[0],$a2
 162         add     $a0,$T1
 163         xor     $a2,$a1                 # sigma1(X[(i+14)&0xf])
 164 
 165         add     `$SZ*($i&0xf)`(%rsp),$T1
 166         mov     $e,$a0
 167         add     $a1,$T1
 168         mov     $a,$a1
 169 ___
 170         &ROUND_00_15(@_);
 171 }
 172 
 173 $code=<<___;
 174 .text
 175 
 176 .globl  $func
 177 .type   $func,\@function,4
 178 .align  16
 179 $func:
 180         push    %rbx
 181         push    %rbp
 182         push    %r12
 183         push    %r13
 184         push    %r14
 185         push    %r15
 186         mov     %rsp,%r11               # copy %rsp
 187         shl     \$4,%rdx                # num*16
 188         sub     \$$framesz,%rsp
 189         lea     ($inp,%rdx,$SZ),%rdx    # inp+num*16*$SZ
 190         and     \$-64,%rsp              # align stack frame
 191         mov     $ctx,$_ctx              # save ctx, 1st arg
 192         mov     $inp,$_inp              # save inp, 2nd arh
 193         mov     %rdx,$_end              # save end pointer, "3rd" arg
 194         mov     %r11,$_rsp              # save copy of %rsp
 195 .Lprologue:
 196 
 197         lea     $TABLE(%rip),$Tbl
 198 
 199         mov     $SZ*0($ctx),$A
 200         mov     $SZ*1($ctx),$B
 201         mov     $SZ*2($ctx),$C
 202         mov     $SZ*3($ctx),$D
 203         mov     $SZ*4($ctx),$E
 204         mov     $SZ*5($ctx),$F
 205         mov     $SZ*6($ctx),$G
 206         mov     $SZ*7($ctx),$H
 207         jmp     .Lloop
 208 
 209 .align  16
 210 .Lloop:
 211         xor     $round,$round
 212 ___
 213         for($i=0;$i<16;$i++) {
 214                 $code.="        mov     $SZ*$i($inp),$T1\n";
 215                 $code.="        mov     @ROT[4],$a0\n";
 216                 $code.="        mov     @ROT[0],$a1\n";
 217                 $code.="        bswap   $T1\n";
 218                 &ROUND_00_15($i,@ROT);
 219                 unshift(@ROT,pop(@ROT));
 220         }
 221 $code.=<<___;
 222         jmp     .Lrounds_16_xx
 223 .align  16
 224 .Lrounds_16_xx:
 225 ___
 226         for(;$i<32;$i++) {
 227                 &ROUND_16_XX($i,@ROT);
 228                 unshift(@ROT,pop(@ROT));
 229         }
 230 
 231 $code.=<<___;
 232         cmp     \$$rounds,$round
 233         jb      .Lrounds_16_xx
 234 
 235         mov     $_ctx,$ctx
 236         lea     16*$SZ($inp),$inp
 237 
 238         add     $SZ*0($ctx),$A
 239         add     $SZ*1($ctx),$B
 240         add     $SZ*2($ctx),$C
 241         add     $SZ*3($ctx),$D
 242         add     $SZ*4($ctx),$E
 243         add     $SZ*5($ctx),$F
 244         add     $SZ*6($ctx),$G
 245         add     $SZ*7($ctx),$H
 246 
 247         cmp     $_end,$inp
 248 
 249         mov     $A,$SZ*0($ctx)
 250         mov     $B,$SZ*1($ctx)
 251         mov     $C,$SZ*2($ctx)
 252         mov     $D,$SZ*3($ctx)
 253         mov     $E,$SZ*4($ctx)
 254         mov     $F,$SZ*5($ctx)
 255         mov     $G,$SZ*6($ctx)
 256         mov     $H,$SZ*7($ctx)
 257         jb      .Lloop
 258 
 259         mov     $_rsp,%rsi
 260         mov     (%rsi),%r15
 261         mov     8(%rsi),%r14
 262         mov     16(%rsi),%r13
 263         mov     24(%rsi),%r12
 264         mov     32(%rsi),%rbp
 265         mov     40(%rsi),%rbx
 266         lea     48(%rsi),%rsp
 267 .Lepilogue:
 268         ret
 269 .size   $func,.-$func
 270 ___
 271 
 272 if ($SZ==4) {
 273 $code.=<<___;
 274 .align  64
 275 .type   $TABLE,\@object
 276 $TABLE:
 277         .long   0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
 278         .long   0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
 279         .long   0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
 280         .long   0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
 281         .long   0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
 282         .long   0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
 283         .long   0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
 284         .long   0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
 285         .long   0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
 286         .long   0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
 287         .long   0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
 288         .long   0xd192e819,0xd6990624,0xf40e3585,0x106aa070
 289         .long   0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
 290         .long   0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
 291         .long   0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
 292         .long   0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 293 ___
 294 } else {
 295 $code.=<<___;
 296 .align  64
 297 .type   $TABLE,\@object
 298 $TABLE:
 299         .quad   0x428a2f98d728ae22,0x7137449123ef65cd
 300         .quad   0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
 301         .quad   0x3956c25bf348b538,0x59f111f1b605d019
 302         .quad   0x923f82a4af194f9b,0xab1c5ed5da6d8118
 303         .quad   0xd807aa98a3030242,0x12835b0145706fbe
 304         .quad   0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
 305         .quad   0x72be5d74f27b896f,0x80deb1fe3b1696b1
 306         .quad   0x9bdc06a725c71235,0xc19bf174cf692694
 307         .quad   0xe49b69c19ef14ad2,0xefbe4786384f25e3
 308         .quad   0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
 309         .quad   0x2de92c6f592b0275,0x4a7484aa6ea6e483
 310         .quad   0x5cb0a9dcbd41fbd4,0x76f988da831153b5
 311         .quad   0x983e5152ee66dfab,0xa831c66d2db43210
 312         .quad   0xb00327c898fb213f,0xbf597fc7beef0ee4
 313         .quad   0xc6e00bf33da88fc2,0xd5a79147930aa725
 314         .quad   0x06ca6351e003826f,0x142929670a0e6e70
 315         .quad   0x27b70a8546d22ffc,0x2e1b21385c26c926
 316         .quad   0x4d2c6dfc5ac42aed,0x53380d139d95b3df
 317         .quad   0x650a73548baf63de,0x766a0abb3c77b2a8
 318         .quad   0x81c2c92e47edaee6,0x92722c851482353b
 319         .quad   0xa2bfe8a14cf10364,0xa81a664bbc423001
 320         .quad   0xc24b8b70d0f89791,0xc76c51a30654be30
 321         .quad   0xd192e819d6ef5218,0xd69906245565a910
 322         .quad   0xf40e35855771202a,0x106aa07032bbd1b8
 323         .quad   0x19a4c116b8d2d0c8,0x1e376c085141ab53
 324         .quad   0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
 325         .quad   0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
 326         .quad   0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
 327         .quad   0x748f82ee5defb2fc,0x78a5636f43172f60
 328         .quad   0x84c87814a1f0ab72,0x8cc702081a6439ec
 329         .quad   0x90befffa23631e28,0xa4506cebde82bde9
 330         .quad   0xbef9a3f7b2c67915,0xc67178f2e372532b
 331         .quad   0xca273eceea26619c,0xd186b8c721c0c207
 332         .quad   0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
 333         .quad   0x06f067aa72176fba,0x0a637dc5a2c898a6
 334         .quad   0x113f9804bef90dae,0x1b710b35131c471b
 335         .quad   0x28db77f523047d84,0x32caab7b40c72493
 336         .quad   0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
 337         .quad   0x4cc5d4becb3e42b6,0x597f299cfc657e2a
 338         .quad   0x5fcb6fab3ad6faec,0x6c44198c4a475817
 339 ___
 340 }
 341 
 342 # EXCEPTION_DISPOSITION handler (EXCEPTION_RECORD *rec,ULONG64 frame,
 343 #               CONTEXT *context,DISPATCHER_CONTEXT *disp)
 344 if ($win64) {
 345 $rec="%rcx";
 346 $frame="%rdx";
 347 $context="%r8";
 348 $disp="%r9";
 349 
 350 $code.=<<___;
 351 .extern __imp_RtlVirtualUnwind
 352 .type   se_handler,\@abi-omnipotent
 353 .align  16
 354 se_handler:
 355         push    %rsi
 356         push    %rdi
 357         push    %rbx
 358         push    %rbp
 359         push    %r12
 360         push    %r13
 361         push    %r14
 362         push    %r15
 363         pushfq
 364         sub     \$64,%rsp
 365 
 366         mov     120($context),%rax      # pull context->Rax
 367         mov     248($context),%rbx      # pull context->Rip
 368 
 369         lea     .Lprologue(%rip),%r10
 370         cmp     %r10,%rbx               # context->Rip<.Lprologue
 371         jb      .Lin_prologue
 372 
 373         mov     152($context),%rax      # pull context->Rsp
 374 
 375         lea     .Lepilogue(%rip),%r10
 376         cmp     %r10,%rbx               # context->Rip>=.Lepilogue
 377         jae     .Lin_prologue
 378 
 379         mov     16*$SZ+3*8(%rax),%rax   # pull $_rsp
 380         lea     48(%rax),%rax
 381 
 382         mov     -8(%rax),%rbx
 383         mov     -16(%rax),%rbp
 384         mov     -24(%rax),%r12
 385         mov     -32(%rax),%r13
 386         mov     -40(%rax),%r14
 387         mov     -48(%rax),%r15
 388         mov     %rbx,144($context)      # restore context->Rbx
 389         mov     %rbp,160($context)      # restore context->Rbp
 390         mov     %r12,216($context)      # restore context->R12
 391         mov     %r13,224($context)      # restore context->R13
 392         mov     %r14,232($context)      # restore context->R14
 393         mov     %r15,240($context)      # restore context->R15
 394 
 395 .Lin_prologue:
 396         mov     8(%rax),%rdi
 397         mov     16(%rax),%rsi
 398         mov     %rax,152($context)      # restore context->Rsp
 399         mov     %rsi,168($context)      # restore context->Rsi
 400         mov     %rdi,176($context)      # restore context->Rdi
 401 
 402         mov     40($disp),%rdi          # disp->ContextRecord
 403         mov     $context,%rsi           # context
 404         mov     \$154,%ecx              # sizeof(CONTEXT)
 405         .long   0xa548f3fc              # cld; rep movsq
 406 
 407         mov     $disp,%rsi
 408         xor     %rcx,%rcx               # arg1, UNW_FLAG_NHANDLER
 409         mov     8(%rsi),%rdx            # arg2, disp->ImageBase
 410         mov     0(%rsi),%r8             # arg3, disp->ControlPc
 411         mov     16(%rsi),%r9            # arg4, disp->FunctionEntry
 412         mov     40(%rsi),%r10           # disp->ContextRecord
 413         lea     56(%rsi),%r11           # &disp->HandlerData
 414         lea     24(%rsi),%r12           # &disp->EstablisherFrame
 415         mov     %r10,32(%rsp)           # arg5
 416         mov     %r11,40(%rsp)           # arg6
 417         mov     %r12,48(%rsp)           # arg7
 418         mov     %rcx,56(%rsp)           # arg8, (NULL)
 419         call    *__imp_RtlVirtualUnwind(%rip)
 420 
 421         mov     \$1,%eax                # ExceptionContinueSearch
 422         add     \$64,%rsp
 423         popfq
 424         pop     %r15
 425         pop     %r14
 426         pop     %r13
 427         pop     %r12
 428         pop     %rbp
 429         pop     %rbx
 430         pop     %rdi
 431         pop     %rsi
 432         ret
 433 .size   se_handler,.-se_handler
 434 
 435 .section        .pdata
 436 .align  4
 437         .rva    .LSEH_begin_$func
 438         .rva    .LSEH_end_$func
 439         .rva    .LSEH_info_$func
 440 
 441 .section        .xdata
 442 .align  8
 443 .LSEH_info_$func:
 444         .byte   9,0,0,0
 445         .rva    se_handler
 446 ___
 447 }
 448 
 449 $code =~ s/\`([^\`]*)\`/eval $1/gem;
 450 print $code;
 451 close STDOUT;