usr/src/common/crypto/sha2/amd64/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 #
  44 # OpenSolaris OS modifications
  45 #
  46 # Sun elects to use this software under the BSD license.
  47 #
  48 # This source originates from OpenSSL file sha512-x86_64.pl at
  49 # ftp://ftp.openssl.org/snapshot/openssl-0.9.8-stable-SNAP-20080131.tar.gz
  50 # (presumably for future OpenSSL release 0.9.8h), with these changes:
  51 #
  52 # 1. Added perl "use strict" and declared variables.
  53 #
  54 # 2. Added OpenSolaris ENTRY_NP/SET_SIZE macros from
  55 # /usr/include/sys/asm_linkage.h, .ident keywords, and lint(1B) guards.
  56 #
  57 # 3. Removed x86_64-xlate.pl script (not needed for as(1) or gas(1)
  58 # assemblers).  Replaced the .picmeup macro with assembler code.
  59 #
  60 # 4. Added 8 to $ctx, as OpenSolaris OS has an extra 4-byte field, "algotype",
  61 # at the beginning of SHA2_CTX (the next field is 8-byte aligned).
  62 #
  63
  64 use strict;
  65 my ($code, $func, $TABLE, $SZ, @Sigma0, @Sigma1, @sigma0, @sigma1, $rounds,
  66         @ROT, $A, $B, $C, $D, $E, $F, $G, $H, $T1, $a0, $a1, $a2, $i,
  67         $ctx, $round, $inp, $Tbl, $_ctx, $_inp, $_end, $_rsp, $framesz);
  68 my $output = shift;
  69 open STDOUT,">$output";
  70
  71 #
  72 # OpenSSL library:
  73 # void sha512_block_data_order(SHA512_CTX *ctx, const void *in, size_t num);
  74 # void sha256_block_data_order(SHA256_CTX *ctx, const void *in, size_t num);
  75 #
  76 # OpenSolaris OS:
  77 # void SHA512TransformBlocks(SHA2_CTX *ctx, const void *in, size_t num);
  78 # void SHA256TransformBlocks(SHA2_CTX *ctx, const void *in, size_t num);
  79 # Note: the OpenSolaris SHA2 structure has an extra 8 byte field at the
  80 # beginning (over OpenSSL's SHA512 or SHA256 structure).
  81 #
  82
  83 if ($output =~ /512/) {
  84         $func="SHA512TransformBlocks";
  85         $TABLE="K512";
  86         $SZ=8;
  87         @ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%rax","%rbx","%rcx","%rdx",
  88                                         "%r8", "%r9", "%r10","%r11");
  89         ($T1,$a0,$a1,$a2)=("%r12","%r13","%r14","%r15");
  90         @Sigma0=(28,34,39);
  91         @Sigma1=(14,18,41);
  92         @sigma0=(1,  8, 7);
  93         @sigma1=(19,61, 6);
  94         $rounds=80;
  95 } else {
  96         $func="SHA256TransformBlocks";
  97         $TABLE="K256";
  98         $SZ=4;
  99         @ROT=($A,$B,$C,$D,$E,$F,$G,$H)=("%eax","%ebx","%ecx","%edx",
 100                                         "%r8d","%r9d","%r10d","%r11d");
 101         ($T1,$a0,$a1,$a2)=("%r12d","%r13d","%r14d","%r15d");
 102         @Sigma0=( 2,13,22);
 103         @Sigma1=( 6,11,25);
 104         @sigma0=( 7,18, 3);
 105         @sigma1=(17,19,10);
 106         $rounds=64;
 107 }
 108
 109 $ctx="%rdi";    # 1st arg
 110 $round="%rdi";  # zaps $ctx
 111 $inp="%rsi";    # 2nd arg
 112 $Tbl="%rbp";
 113
 114 $_ctx="16*$SZ+0*8(%rsp)";
 115 $_inp="16*$SZ+1*8(%rsp)";
 116 $_end="16*$SZ+2*8(%rsp)";
 117 $_rsp="16*$SZ+3*8(%rsp)";
 118 $framesz="16*$SZ+4*8";
 119
 120
 121 sub ROUND_00_15()
 122 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;
 123
 124 $code.=<<___;
 125         mov     $e,$a0
 126         mov     $e,$a1
 127         mov     $f,$a2
 128
 129         ror     \$$Sigma1[0],$a0
 130         ror     \$$Sigma1[1],$a1
 131         xor     $g,$a2                  # f^g
 132
 133         xor     $a1,$a0
 134         ror     \$`$Sigma1[2]-$Sigma1[1]`,$a1
 135         and     $e,$a2                  # (f^g)&e
 136         mov     $T1,`$SZ*($i&0xf)`(%rsp)
 137
 138         xor     $a1,$a0                 # Sigma1(e)
 139         xor     $g,$a2                  # Ch(e,f,g)=((f^g)&e)^g
 140         add     $h,$T1                  # T1+=h
 141
 142         mov     $a,$h
 143         add     $a0,$T1                 # T1+=Sigma1(e)
 144
 145         add     $a2,$T1                 # T1+=Ch(e,f,g)
 146         mov     $a,$a0
 147         mov     $a,$a1
 148
 149         ror     \$$Sigma0[0],$h
 150         ror     \$$Sigma0[1],$a0
 151         mov     $a,$a2
 152         add     ($Tbl,$round,$SZ),$T1   # T1+=K[round]
 153
 154         xor     $a0,$h
 155         ror     \$`$Sigma0[2]-$Sigma0[1]`,$a0
 156         or      $c,$a1                  # a|c
 157
 158         xor     $a0,$h                  # h=Sigma0(a)
 159         and     $c,$a2                  # a&c
 160         add     $T1,$d                  # d+=T1
 161
 162         and     $b,$a1                  # (a|c)&b
 163         add     $T1,$h                  # h+=T1
 164
 165         or      $a2,$a1                 # Maj(a,b,c)=((a|c)&b)|(a&c)
 166         lea     1($round),$round        # round++
 167
 168         add     $a1,$h                  # h+=Maj(a,b,c)
 169 ___
 170 }
 171
 172 sub ROUND_16_XX()
 173 { my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;
 174
 175 $code.=<<___;
 176         mov     `$SZ*(($i+1)&0xf)`(%rsp),$a0
 177         mov     `$SZ*(($i+14)&0xf)`(%rsp),$T1
 178
 179         mov     $a0,$a2
 180
 181         shr     \$$sigma0[2],$a0
 182         ror     \$$sigma0[0],$a2
 183
 184         xor     $a2,$a0
 185         ror     \$`$sigma0[1]-$sigma0[0]`,$a2
 186
 187         xor     $a2,$a0                 # sigma0(X[(i+1)&0xf])
 188         mov     $T1,$a1
 189
 190         shr     \$$sigma1[2],$T1
 191         ror     \$$sigma1[0],$a1
 192
 193         xor     $a1,$T1
 194         ror     \$`$sigma1[1]-$sigma1[0]`,$a1
 195
 196         xor     $a1,$T1                 # sigma1(X[(i+14)&0xf])
 197
 198         add     $a0,$T1
 199
 200         add     `$SZ*(($i+9)&0xf)`(%rsp),$T1
 201
 202         add     `$SZ*($i&0xf)`(%rsp),$T1
 203 ___
 204         &ROUND_00_15(@_);
 205 }
 206
 207 #
 208 # Execution begins here
 209 #
 210
 211 $code=<<___;
 212 #include <sys/asm_linkage.h>
 213
 214 ENTRY_NP($func)
 215         push    %rbx
 216         push    %rbp
 217         push    %r12
 218         push    %r13
 219         push    %r14
 220         push    %r15
 221         mov     %rsp,%rbp               # copy %rsp
 222         shl     \$4,%rdx                # num*16
 223         sub     \$$framesz,%rsp
 224         lea     ($inp,%rdx,$SZ),%rdx    # inp+num*16*$SZ
 225         and     \$-64,%rsp              # align stack frame
 226         add     \$8,$ctx                # Skip OpenSolaris field, "algotype"
 227         mov     $ctx,$_ctx              # save ctx, 1st arg
 228         mov     $inp,$_inp              # save inp, 2nd arg
 229         mov     %rdx,$_end              # save end pointer, "3rd" arg
 230         mov     %rbp,$_rsp              # save copy of %rsp
 231
 232         /.picmeup $Tbl
 233         / The .picmeup pseudo-directive, from perlasm/x86_64_xlate.pl, puts
 234         / the address of the "next" instruction into the target register
 235         / ($Tbl).  This generates these 2 instructions:
 236         lea     .Llea(%rip),$Tbl
 237         /nop    / .picmeup generates a nop for mod 8 alignment--not needed here
 238
 239 .Llea:
 240         lea     $TABLE-.($Tbl),$Tbl
 241
 242         mov     $SZ*0($ctx),$A
 243         mov     $SZ*1($ctx),$B
 244         mov     $SZ*2($ctx),$C
 245         mov     $SZ*3($ctx),$D
 246         mov     $SZ*4($ctx),$E
 247         mov     $SZ*5($ctx),$F
 248         mov     $SZ*6($ctx),$G
 249         mov     $SZ*7($ctx),$H
 250         jmp     .Lloop
 251
 252 .align  16
 253 .Lloop:
 254         xor     $round,$round
 255 ___
 256         for($i=0;$i<16;$i++) {
 257                 $code.="        mov     $SZ*$i($inp),$T1\n";
 258                 $code.="        bswap   $T1\n";
 259                 &ROUND_00_15($i,@ROT);
 260                 unshift(@ROT,pop(@ROT));
 261         }
 262 $code.=<<___;
 263         jmp     .Lrounds_16_xx
 264 .align  16
 265 .Lrounds_16_xx:
 266 ___
 267         for(;$i<32;$i++) {
 268                 &ROUND_16_XX($i,@ROT);
 269                 unshift(@ROT,pop(@ROT));
 270         }
 271
 272 $code.=<<___;
 273         cmp     \$$rounds,$round
 274         jb      .Lrounds_16_xx
 275
 276         mov     $_ctx,$ctx
 277         lea     16*$SZ($inp),$inp
 278
 279         add     $SZ*0($ctx),$A
 280         add     $SZ*1($ctx),$B
 281         add     $SZ*2($ctx),$C
 282         add     $SZ*3($ctx),$D
 283         add     $SZ*4($ctx),$E
 284         add     $SZ*5($ctx),$F
 285         add     $SZ*6($ctx),$G
 286         add     $SZ*7($ctx),$H
 287
 288         cmp     $_end,$inp
 289
 290         mov     $A,$SZ*0($ctx)
 291         mov     $B,$SZ*1($ctx)
 292         mov     $C,$SZ*2($ctx)
 293         mov     $D,$SZ*3($ctx)
 294         mov     $E,$SZ*4($ctx)
 295         mov     $F,$SZ*5($ctx)
 296         mov     $G,$SZ*6($ctx)
 297         mov     $H,$SZ*7($ctx)
 298         jb      .Lloop
 299
 300         mov     $_rsp,%rsp
 301         pop     %r15
 302         pop     %r14
 303         pop     %r13
 304         pop     %r12
 305         pop     %rbp
 306         pop     %rbx
 307
 308         ret
 309 SET_SIZE($func)
 310
 311 ___
 312
 313 if ($SZ==4) {
 314 # SHA256
 315 $code.=<<___;
 316 .align  64
 317 .type   $TABLE,\@object
 318 $TABLE:
 319         .long   0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
 320         .long   0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
 321         .long   0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
 322         .long   0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
 323         .long   0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
 324         .long   0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
 325         .long   0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
 326         .long   0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
 327         .long   0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
 328         .long   0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
 329         .long   0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
 330         .long   0xd192e819,0xd6990624,0xf40e3585,0x106aa070
 331         .long   0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
 332         .long   0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
 333         .long   0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
 334         .long   0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 335 ___
 336 } else {
 337 # SHA512
 338 $code.=<<___;
 339 .align  64
 340 .type   $TABLE,\@object
 341 $TABLE:
 342         .quad   0x428a2f98d728ae22,0x7137449123ef65cd
 343         .quad   0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
 344         .quad   0x3956c25bf348b538,0x59f111f1b605d019
 345         .quad   0x923f82a4af194f9b,0xab1c5ed5da6d8118
 346         .quad   0xd807aa98a3030242,0x12835b0145706fbe
 347         .quad   0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
 348         .quad   0x72be5d74f27b896f,0x80deb1fe3b1696b1
 349         .quad   0x9bdc06a725c71235,0xc19bf174cf692694
 350         .quad   0xe49b69c19ef14ad2,0xefbe4786384f25e3
 351         .quad   0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
 352         .quad   0x2de92c6f592b0275,0x4a7484aa6ea6e483
 353         .quad   0x5cb0a9dcbd41fbd4,0x76f988da831153b5
 354         .quad   0x983e5152ee66dfab,0xa831c66d2db43210
 355         .quad   0xb00327c898fb213f,0xbf597fc7beef0ee4
 356         .quad   0xc6e00bf33da88fc2,0xd5a79147930aa725
 357         .quad   0x06ca6351e003826f,0x142929670a0e6e70
 358         .quad   0x27b70a8546d22ffc,0x2e1b21385c26c926
 359         .quad   0x4d2c6dfc5ac42aed,0x53380d139d95b3df
 360         .quad   0x650a73548baf63de,0x766a0abb3c77b2a8
 361         .quad   0x81c2c92e47edaee6,0x92722c851482353b
 362         .quad   0xa2bfe8a14cf10364,0xa81a664bbc423001
 363         .quad   0xc24b8b70d0f89791,0xc76c51a30654be30
 364         .quad   0xd192e819d6ef5218,0xd69906245565a910
 365         .quad   0xf40e35855771202a,0x106aa07032bbd1b8
 366         .quad   0x19a4c116b8d2d0c8,0x1e376c085141ab53
 367         .quad   0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
 368         .quad   0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
 369         .quad   0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
 370         .quad   0x748f82ee5defb2fc,0x78a5636f43172f60
 371         .quad   0x84c87814a1f0ab72,0x8cc702081a6439ec
 372         .quad   0x90befffa23631e28,0xa4506cebde82bde9
 373         .quad   0xbef9a3f7b2c67915,0xc67178f2e372532b
 374         .quad   0xca273eceea26619c,0xd186b8c721c0c207
 375         .quad   0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
 376         .quad   0x06f067aa72176fba,0x0a637dc5a2c898a6
 377         .quad   0x113f9804bef90dae,0x1b710b35131c471b
 378         .quad   0x28db77f523047d84,0x32caab7b40c72493
 379         .quad   0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
 380         .quad   0x4cc5d4becb3e42b6,0x597f299cfc657e2a
 381         .quad   0x5fcb6fab3ad6faec,0x6c44198c4a475817
 382 ___
 383 }
 384 $code.=<<___;
 385 ___
 386
 387 $code =~ s/\`([^\`]*)\`/eval $1/gem;
 388 print $code;
 389 close STDOUT;