crypto/sha/asm/sha512-x86_64.pl

   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 $output=shift;
  44 open STDOUT,"| $^X ../perlasm/x86_64-xlate.pl $output";
  45
  46 if ($output =~ /512/) {
  47         $func="sha512_block_data_order";
  48         $TABLE="K512";
  49         $SZ=8;
  50         @ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%rax","%rbx","%rcx","%rdx",
  51                                         "%r8", "%r9", "%r10","%r11");
  52         ($T1,$a0,$a1,$a2)=("%r12","%r13","%r14","%r15");
  53         @Sigma0=(28,34,39);
  54         @Sigma1=(14,18,41);
  55         @sigma0=(1,  8, 7);
  56         @sigma1=(19,61, 6);
  57         $rounds=80;
  58 } else {
  59         $func="sha256_block_data_order";
  60         $TABLE="K256";
  61         $SZ=4;
  62         @ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%eax","%ebx","%ecx","%edx",
  63                                         "%r8d","%r9d","%r10d","%r11d");
  64         ($T1,$a0,$a1,$a2)=("%r12d","%r13d","%r14d","%r15d");
  65         @Sigma0=( 2,13,22);
  66         @Sigma1=( 6,11,25);
  67         @sigma0=( 7,18, 3);
  68         @sigma1=(17,19,10);
  69         $rounds=64;
  70 }
  71
  72 $ctx="%rdi";    # 1st arg
  73 $round="%rdi";  # zaps $ctx
  74 $inp="%rsi";    # 2nd arg
  75 $Tbl="%rbp";
  76
  77 $_ctx="16*$SZ+0*8(%rsp)";
  78 $_inp="16*$SZ+1*8(%rsp)";
  79 $_end="16*$SZ+2*8(%rsp)";
  80 $_rsp="16*$SZ+3*8(%rsp)";
  81 $framesz="16*$SZ+4*8";
  82
  83
  84 sub ROUND_00_15()
  85 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;
  86
  87 $code.=<<___;
  88         mov     $e,$a0
  89         mov     $e,$a1
  90         mov     $f,$a2
  91
  92         ror     \$$Sigma1[0],$a0
  93         ror     \$$Sigma1[1],$a1
  94         xor     $g,$a2                  # f^g
  95
  96         xor     $a1,$a0
  97         ror     \$`$Sigma1[2]-$Sigma1[1]`,$a1
  98         and     $e,$a2                  # (f^g)&e
  99         mov     $T1,`$SZ*($i&0xf)`(%rsp)
 100
 101         xor     $a1,$a0                 # Sigma1(e)
 102         xor     $g,$a2                  # Ch(e,f,g)=((f^g)&e)^g
 103         add     $h,$T1                  # T1+=h
 104
 105         mov     $a,$h
 106         add     $a0,$T1                 # T1+=Sigma1(e)
 107
 108         add     $a2,$T1                 # T1+=Ch(e,f,g)
 109         mov     $a,$a0
 110         mov     $a,$a1
 111
 112         ror     \$$Sigma0[0],$h
 113         ror     \$$Sigma0[1],$a0
 114         mov     $a,$a2
 115         add     ($Tbl,$round,$SZ),$T1   # T1+=K[round]
 116
 117         xor     $a0,$h
 118         ror     \$`$Sigma0[2]-$Sigma0[1]`,$a0
 119         or      $c,$a1                  # a|c
 120
 121         xor     $a0,$h                  # h=Sigma0(a)
 122         and     $c,$a2                  # a&c
 123         add     $T1,$d                  # d+=T1
 124
 125         and     $b,$a1                  # (a|c)&b
 126         add     $T1,$h                  # h+=T1
 127
 128         or      $a2,$a1                 # Maj(a,b,c)=((a|c)&b)|(a&c)
 129         lea     1($round),$round        # round++
 130
 131         add     $a1,$h                  # h+=Maj(a,b,c)
 132 ___
 133 }
 134
 135 sub ROUND_16_XX()
 136 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;
 137
 138 $code.=<<___;
 139         mov     `$SZ*(($i+1)&0xf)`(%rsp),$a0
 140         mov     `$SZ*(($i+14)&0xf)`(%rsp),$T1
 141
 142         mov     $a0,$a2
 143
 144         shr     \$$sigma0[2],$a0
 145         ror     \$$sigma0[0],$a2
 146
 147         xor     $a2,$a0
 148         ror     \$`$sigma0[1]-$sigma0[0]`,$a2
 149
 150         xor     $a2,$a0                 # sigma0(X[(i+1)&0xf])
 151         mov     $T1,$a1
 152
 153         shr     \$$sigma1[2],$T1
 154         ror     \$$sigma1[0],$a1
 155
 156         xor     $a1,$T1
 157         ror     \$`$sigma1[1]-$sigma1[0]`,$a1
 158
 159         xor     $a1,$T1                 # sigma1(X[(i+14)&0xf])
 160
 161         add     $a0,$T1
 162
 163         add     `$SZ*(($i+9)&0xf)`(%rsp),$T1
 164
 165         add     `$SZ*($i&0xf)`(%rsp),$T1
 166 ___
 167         &ROUND_00_15(@_);
 168 }
 169
 170 $code=<<___;
 171 .text
 172
 173 .globl  $func
 174 .type   $func,\@function,4
 175 .align  16
 176 $func:
 177         push    %rbx
 178         push    %rbp
 179         push    %r12
 180         push    %r13
 181         push    %r14
 182         push    %r15
 183         mov     %rsp,%rbp               # copy %rsp
 184         shl     \$4,%rdx                # num*16
 185         sub     \$$framesz,%rsp
 186         lea     ($inp,%rdx,$SZ),%rdx    # inp+num*16*$SZ
 187         and     \$-64,%rsp              # align stack frame
 188         mov     $ctx,$_ctx              # save ctx, 1st arg
 189         mov     $inp,$_inp              # save inp, 2nd arh
 190         mov     %rdx,$_end              # save end pointer, "3rd" arg
 191         mov     %rbp,$_rsp              # save copy of %rsp
 192
 193         .picmeup $Tbl
 194         lea     $TABLE-.($Tbl),$Tbl
 195
 196         mov     $SZ*0($ctx),$A
 197         mov     $SZ*1($ctx),$B
 198         mov     $SZ*2($ctx),$C
 199         mov     $SZ*3($ctx),$D
 200         mov     $SZ*4($ctx),$E
 201         mov     $SZ*5($ctx),$F
 202         mov     $SZ*6($ctx),$G
 203         mov     $SZ*7($ctx),$H
 204         jmp     .Lloop
 205
 206 .align  16
 207 .Lloop:
 208         xor     $round,$round
 209 ___
 210         for($i=0;$i<16;$i++) {
 211                 $code.="        mov     $SZ*$i($inp),$T1\n";
 212                 $code.="        bswap   $T1\n";
 213                 &ROUND_00_15($i,@ROT);
 214                 unshift(@ROT,pop(@ROT));
 215         }
 216 $code.=<<___;
 217         jmp     .Lrounds_16_xx
 218 .align  16
 219 .Lrounds_16_xx:
 220 ___
 221         for(;$i<32;$i++) {
 222                 &ROUND_16_XX($i,@ROT);
 223                 unshift(@ROT,pop(@ROT));
 224         }
 225
 226 $code.=<<___;
 227         cmp     \$$rounds,$round
 228         jb      .Lrounds_16_xx
 229
 230         mov     $_ctx,$ctx
 231         lea     16*$SZ($inp),$inp
 232
 233         add     $SZ*0($ctx),$A
 234         add     $SZ*1($ctx),$B
 235         add     $SZ*2($ctx),$C
 236         add     $SZ*3($ctx),$D
 237         add     $SZ*4($ctx),$E
 238         add     $SZ*5($ctx),$F
 239         add     $SZ*6($ctx),$G
 240         add     $SZ*7($ctx),$H
 241
 242         cmp     $_end,$inp
 243
 244         mov     $A,$SZ*0($ctx)
 245         mov     $B,$SZ*1($ctx)
 246         mov     $C,$SZ*2($ctx)
 247         mov     $D,$SZ*3($ctx)
 248         mov     $E,$SZ*4($ctx)
 249         mov     $F,$SZ*5($ctx)
 250         mov     $G,$SZ*6($ctx)
 251         mov     $H,$SZ*7($ctx)
 252         jb      .Lloop
 253
 254         mov     $_rsp,%rsp
 255         pop     %r15
 256         pop     %r14
 257         pop     %r13
 258         pop     %r12
 259         pop     %rbp
 260         pop     %rbx
 261
 262         ret
 263 .size   $func,.-$func
 264 ___
 265
 266 if ($SZ==4) {
 267 $code.=<<___;
 268 .align  64
 269 .type   $TABLE,\@object
 270 $TABLE:
 271         .long   0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
 272         .long   0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
 273         .long   0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
 274         .long   0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
 275         .long   0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
 276         .long   0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
 277         .long   0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
 278         .long   0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
 279         .long   0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
 280         .long   0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
 281         .long   0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
 282         .long   0xd192e819,0xd6990624,0xf40e3585,0x106aa070
 283         .long   0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
 284         .long   0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
 285         .long   0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
 286         .long   0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 287 ___
 288 } else {
 289 $code.=<<___;
 290 .align  64
 291 .type   $TABLE,\@object
 292 $TABLE:
 293         .quad   0x428a2f98d728ae22,0x7137449123ef65cd
 294         .quad   0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
 295         .quad   0x3956c25bf348b538,0x59f111f1b605d019
 296         .quad   0x923f82a4af194f9b,0xab1c5ed5da6d8118
 297         .quad   0xd807aa98a3030242,0x12835b0145706fbe
 298         .quad   0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
 299         .quad   0x72be5d74f27b896f,0x80deb1fe3b1696b1
 300         .quad   0x9bdc06a725c71235,0xc19bf174cf692694
 301         .quad   0xe49b69c19ef14ad2,0xefbe4786384f25e3
 302         .quad   0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
 303         .quad   0x2de92c6f592b0275,0x4a7484aa6ea6e483
 304         .quad   0x5cb0a9dcbd41fbd4,0x76f988da831153b5
 305         .quad   0x983e5152ee66dfab,0xa831c66d2db43210
 306         .quad   0xb00327c898fb213f,0xbf597fc7beef0ee4
 307         .quad   0xc6e00bf33da88fc2,0xd5a79147930aa725
 308         .quad   0x06ca6351e003826f,0x142929670a0e6e70
 309         .quad   0x27b70a8546d22ffc,0x2e1b21385c26c926
 310         .quad   0x4d2c6dfc5ac42aed,0x53380d139d95b3df
 311         .quad   0x650a73548baf63de,0x766a0abb3c77b2a8
 312         .quad   0x81c2c92e47edaee6,0x92722c851482353b
 313         .quad   0xa2bfe8a14cf10364,0xa81a664bbc423001
 314         .quad   0xc24b8b70d0f89791,0xc76c51a30654be30
 315         .quad   0xd192e819d6ef5218,0xd69906245565a910
 316         .quad   0xf40e35855771202a,0x106aa07032bbd1b8
 317         .quad   0x19a4c116b8d2d0c8,0x1e376c085141ab53
 318         .quad   0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
 319         .quad   0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
 320         .quad   0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
 321         .quad   0x748f82ee5defb2fc,0x78a5636f43172f60
 322         .quad   0x84c87814a1f0ab72,0x8cc702081a6439ec
 323         .quad   0x90befffa23631e28,0xa4506cebde82bde9
 324         .quad   0xbef9a3f7b2c67915,0xc67178f2e372532b
 325         .quad   0xca273eceea26619c,0xd186b8c721c0c207
 326         .quad   0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
 327         .quad   0x06f067aa72176fba,0x0a637dc5a2c898a6
 328         .quad   0x113f9804bef90dae,0x1b710b35131c471b
 329         .quad   0x28db77f523047d84,0x32caab7b40c72493
 330         .quad   0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
 331         .quad   0x4cc5d4becb3e42b6,0x597f299cfc657e2a
 332         .quad   0x5fcb6fab3ad6faec,0x6c44198c4a475817
 333 ___
 334 }
 335
 336 $code =~ s/\`([^\`]*)\`/eval $1/gem;
 337 print $code;
 338 close STDOUT;