crypto/sha/asm/sha512-armv8.pl

   1 #! /usr/bin/env perl
   2 # Copyright 2014-2016 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 # SHA256/512 for ARMv8.
  18 #
  19 # Performance in cycles per processed byte and improvement coefficient
  20 # over code generated with "default" compiler:
  21 #
  22 #               SHA256-hw       SHA256(*)       SHA512
  23 # Apple A7      1.97            10.5 (+33%)     6.73 (-1%(**))
  24 # Cortex-A53    2.38            15.5 (+115%)    10.0 (+150%(***))
  25 # Cortex-A57    2.31            11.6 (+86%)     7.51 (+260%(***))
  26 # Denver        2.01            10.5 (+26%)     6.70 (+8%)
  27 # X-Gene                        20.0 (+100%)    12.8 (+300%(***))
  28 # Mongoose      2.36            13.0 (+50%)     8.36 (+33%)
  29 #
  30 # (*)   Software SHA256 results are of lesser relevance, presented
  31 #       mostly for informational purposes.
  32 # (**)  The result is a trade-off: it's possible to improve it by
  33 #       10% (or by 1 cycle per round), but at the cost of 20% loss
  34 #       on Cortex-A53 (or by 4 cycles per round).
  35 # (***) Super-impressive coefficients over gcc-generated code are
  36 #       indication of some compiler "pathology", most notably code
  37 #       generated with -mgeneral-regs-only is significanty faster
  38 #       and the gap is only 40-90%.
  39
  40 $flavour=shift;
  41 $output=shift;
  42
  43 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  44 ( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
  45 ( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or
  46 die "can't locate arm-xlate.pl";
  47
  48 open OUT,"| \"$^X\" $xlate $flavour $output";
  49 *STDOUT=*OUT;
  50
  51 if ($output =~ /512/) {
  52         $BITS=512;
  53         $SZ=8;
  54         @Sigma0=(28,34,39);
  55         @Sigma1=(14,18,41);
  56         @sigma0=(1,  8, 7);
  57         @sigma1=(19,61, 6);
  58         $rounds=80;
  59         $reg_t="x";
  60 } else {
  61         $BITS=256;
  62         $SZ=4;
  63         @Sigma0=( 2,13,22);
  64         @Sigma1=( 6,11,25);
  65         @sigma0=( 7,18, 3);
  66         @sigma1=(17,19,10);
  67         $rounds=64;
  68         $reg_t="w";
  69 }
  70
  71 $func="sha${BITS}_block_data_order";
  72
  73 ($ctx,$inp,$num,$Ktbl)=map("x$_",(0..2,30));
  74
  75 @X=map("$reg_t$_",(3..15,0..2));
  76 @V=($A,$B,$C,$D,$E,$F,$G,$H)=map("$reg_t$_",(20..27));
  77 ($t0,$t1,$t2,$t3)=map("$reg_t$_",(16,17,19,28));
  78
  79 sub BODY_00_xx {
  80 my ($i,$a,$b,$c,$d,$e,$f,$g,$h)=@_;
  81 my $j=($i+1)&15;
  82 my ($T0,$T1,$T2)=(@X[($i-8)&15],@X[($i-9)&15],@X[($i-10)&15]);
  83    $T0=@X[$i+3] if ($i<11);
  84
  85 $code.=<<___    if ($i<16);
  86 #ifndef __ARMEB__
  87         rev     @X[$i],@X[$i]                   // $i
  88 #endif
  89 ___
  90 $code.=<<___    if ($i<13 && ($i&1));
  91         ldp     @X[$i+1],@X[$i+2],[$inp],#2*$SZ
  92 ___
  93 $code.=<<___    if ($i==13);
  94         ldp     @X[14],@X[15],[$inp]
  95 ___
  96 $code.=<<___    if ($i>=14);
  97         ldr     @X[($i-11)&15],[sp,#`$SZ*(($i-11)%4)`]
  98 ___
  99 $code.=<<___    if ($i>0 && $i<16);
 100         add     $a,$a,$t1                       // h+=Sigma0(a)
 101 ___
 102 $code.=<<___    if ($i>=11);
 103         str     @X[($i-8)&15],[sp,#`$SZ*(($i-8)%4)`]
 104 ___
 105 # While ARMv8 specifies merged rotate-n-logical operation such as
 106 # 'eor x,y,z,ror#n', it was found to negatively affect performance
 107 # on Apple A7. The reason seems to be that it requires even 'y' to
 108 # be available earlier. This means that such merged instruction is
 109 # not necessarily best choice on critical path... On the other hand
 110 # Cortex-A5x handles merged instructions much better than disjoint
 111 # rotate and logical... See (**) footnote above.
 112 $code.=<<___    if ($i<15);
 113         ror     $t0,$e,#$Sigma1[0]
 114         add     $h,$h,$t2                       // h+=K[i]
 115         eor     $T0,$e,$e,ror#`$Sigma1[2]-$Sigma1[1]`
 116         and     $t1,$f,$e
 117         bic     $t2,$g,$e
 118         add     $h,$h,@X[$i&15]                 // h+=X[i]
 119         orr     $t1,$t1,$t2                     // Ch(e,f,g)
 120         eor     $t2,$a,$b                       // a^b, b^c in next round
 121         eor     $t0,$t0,$T0,ror#$Sigma1[1]      // Sigma1(e)
 122         ror     $T0,$a,#$Sigma0[0]
 123         add     $h,$h,$t1                       // h+=Ch(e,f,g)
 124         eor     $t1,$a,$a,ror#`$Sigma0[2]-$Sigma0[1]`
 125         add     $h,$h,$t0                       // h+=Sigma1(e)
 126         and     $t3,$t3,$t2                     // (b^c)&=(a^b)
 127         add     $d,$d,$h                        // d+=h
 128         eor     $t3,$t3,$b                      // Maj(a,b,c)
 129         eor     $t1,$T0,$t1,ror#$Sigma0[1]      // Sigma0(a)
 130         add     $h,$h,$t3                       // h+=Maj(a,b,c)
 131         ldr     $t3,[$Ktbl],#$SZ                // *K++, $t2 in next round
 132         //add   $h,$h,$t1                       // h+=Sigma0(a)
 133 ___
 134 $code.=<<___    if ($i>=15);
 135         ror     $t0,$e,#$Sigma1[0]
 136         add     $h,$h,$t2                       // h+=K[i]
 137         ror     $T1,@X[($j+1)&15],#$sigma0[0]
 138         and     $t1,$f,$e
 139         ror     $T2,@X[($j+14)&15],#$sigma1[0]
 140         bic     $t2,$g,$e
 141         ror     $T0,$a,#$Sigma0[0]
 142         add     $h,$h,@X[$i&15]                 // h+=X[i]
 143         eor     $t0,$t0,$e,ror#$Sigma1[1]
 144         eor     $T1,$T1,@X[($j+1)&15],ror#$sigma0[1]
 145         orr     $t1,$t1,$t2                     // Ch(e,f,g)
 146         eor     $t2,$a,$b                       // a^b, b^c in next round
 147         eor     $t0,$t0,$e,ror#$Sigma1[2]       // Sigma1(e)
 148         eor     $T0,$T0,$a,ror#$Sigma0[1]
 149         add     $h,$h,$t1                       // h+=Ch(e,f,g)
 150         and     $t3,$t3,$t2                     // (b^c)&=(a^b)
 151         eor     $T2,$T2,@X[($j+14)&15],ror#$sigma1[1]
 152         eor     $T1,$T1,@X[($j+1)&15],lsr#$sigma0[2]    // sigma0(X[i+1])
 153         add     $h,$h,$t0                       // h+=Sigma1(e)
 154         eor     $t3,$t3,$b                      // Maj(a,b,c)
 155         eor     $t1,$T0,$a,ror#$Sigma0[2]       // Sigma0(a)
 156         eor     $T2,$T2,@X[($j+14)&15],lsr#$sigma1[2]   // sigma1(X[i+14])
 157         add     @X[$j],@X[$j],@X[($j+9)&15]
 158         add     $d,$d,$h                        // d+=h
 159         add     $h,$h,$t3                       // h+=Maj(a,b,c)
 160         ldr     $t3,[$Ktbl],#$SZ                // *K++, $t2 in next round
 161         add     @X[$j],@X[$j],$T1
 162         add     $h,$h,$t1                       // h+=Sigma0(a)
 163         add     @X[$j],@X[$j],$T2
 164 ___
 165         ($t2,$t3)=($t3,$t2);
 166 }
 167
 168 $code.=<<___;
 169 #include "arm_arch.h"
 170
 171 .text
 172
 173 .extern OPENSSL_armcap_P
 174 .globl  $func
 175 .type   $func,%function
 176 .align  6
 177 $func:
 178 ___
 179 $code.=<<___    if ($SZ==4);
 180 #ifdef  __ILP32__
 181         ldrsw   x16,.LOPENSSL_armcap_P
 182 #else
 183         ldr     x16,.LOPENSSL_armcap_P
 184 #endif
 185         adr     x17,.LOPENSSL_armcap_P
 186         add     x16,x16,x17
 187         ldr     w16,[x16]
 188         tst     w16,#ARMV8_SHA256
 189         b.ne    .Lv8_entry
 190 ___
 191 $code.=<<___;
 192         stp     x29,x30,[sp,#-128]!
 193         add     x29,sp,#0
 194
 195         stp     x19,x20,[sp,#16]
 196         stp     x21,x22,[sp,#32]
 197         stp     x23,x24,[sp,#48]
 198         stp     x25,x26,[sp,#64]
 199         stp     x27,x28,[sp,#80]
 200         sub     sp,sp,#4*$SZ
 201
 202         ldp     $A,$B,[$ctx]                            // load context
 203         ldp     $C,$D,[$ctx,#2*$SZ]
 204         ldp     $E,$F,[$ctx,#4*$SZ]
 205         add     $num,$inp,$num,lsl#`log(16*$SZ)/log(2)` // end of input
 206         ldp     $G,$H,[$ctx,#6*$SZ]
 207         adr     $Ktbl,.LK$BITS
 208         stp     $ctx,$num,[x29,#96]
 209
 210 .Loop:
 211         ldp     @X[0],@X[1],[$inp],#2*$SZ
 212         ldr     $t2,[$Ktbl],#$SZ                        // *K++
 213         eor     $t3,$B,$C                               // magic seed
 214         str     $inp,[x29,#112]
 215 ___
 216 for ($i=0;$i<16;$i++)   { &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
 217 $code.=".Loop_16_xx:\n";
 218 for (;$i<32;$i++)       { &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
 219 $code.=<<___;
 220         cbnz    $t2,.Loop_16_xx
 221
 222         ldp     $ctx,$num,[x29,#96]
 223         ldr     $inp,[x29,#112]
 224         sub     $Ktbl,$Ktbl,#`$SZ*($rounds+1)`          // rewind
 225
 226         ldp     @X[0],@X[1],[$ctx]
 227         ldp     @X[2],@X[3],[$ctx,#2*$SZ]
 228         add     $inp,$inp,#14*$SZ                       // advance input pointer
 229         ldp     @X[4],@X[5],[$ctx,#4*$SZ]
 230         add     $A,$A,@X[0]
 231         ldp     @X[6],@X[7],[$ctx,#6*$SZ]
 232         add     $B,$B,@X[1]
 233         add     $C,$C,@X[2]
 234         add     $D,$D,@X[3]
 235         stp     $A,$B,[$ctx]
 236         add     $E,$E,@X[4]
 237         add     $F,$F,@X[5]
 238         stp     $C,$D,[$ctx,#2*$SZ]
 239         add     $G,$G,@X[6]
 240         add     $H,$H,@X[7]
 241         cmp     $inp,$num
 242         stp     $E,$F,[$ctx,#4*$SZ]
 243         stp     $G,$H,[$ctx,#6*$SZ]
 244         b.ne    .Loop
 245
 246         ldp     x19,x20,[x29,#16]
 247         add     sp,sp,#4*$SZ
 248         ldp     x21,x22,[x29,#32]
 249         ldp     x23,x24,[x29,#48]
 250         ldp     x25,x26,[x29,#64]
 251         ldp     x27,x28,[x29,#80]
 252         ldp     x29,x30,[sp],#128
 253         ret
 254 .size   $func,.-$func
 255
 256 .align  6
 257 .type   .LK$BITS,%object
 258 .LK$BITS:
 259 ___
 260 $code.=<<___ if ($SZ==8);
 261         .quad   0x428a2f98d728ae22,0x7137449123ef65cd
 262         .quad   0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
 263         .quad   0x3956c25bf348b538,0x59f111f1b605d019
 264         .quad   0x923f82a4af194f9b,0xab1c5ed5da6d8118
 265         .quad   0xd807aa98a3030242,0x12835b0145706fbe
 266         .quad   0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
 267         .quad   0x72be5d74f27b896f,0x80deb1fe3b1696b1
 268         .quad   0x9bdc06a725c71235,0xc19bf174cf692694
 269         .quad   0xe49b69c19ef14ad2,0xefbe4786384f25e3
 270         .quad   0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
 271         .quad   0x2de92c6f592b0275,0x4a7484aa6ea6e483
 272         .quad   0x5cb0a9dcbd41fbd4,0x76f988da831153b5
 273         .quad   0x983e5152ee66dfab,0xa831c66d2db43210
 274         .quad   0xb00327c898fb213f,0xbf597fc7beef0ee4
 275         .quad   0xc6e00bf33da88fc2,0xd5a79147930aa725
 276         .quad   0x06ca6351e003826f,0x142929670a0e6e70
 277         .quad   0x27b70a8546d22ffc,0x2e1b21385c26c926
 278         .quad   0x4d2c6dfc5ac42aed,0x53380d139d95b3df
 279         .quad   0x650a73548baf63de,0x766a0abb3c77b2a8
 280         .quad   0x81c2c92e47edaee6,0x92722c851482353b
 281         .quad   0xa2bfe8a14cf10364,0xa81a664bbc423001
 282         .quad   0xc24b8b70d0f89791,0xc76c51a30654be30
 283         .quad   0xd192e819d6ef5218,0xd69906245565a910
 284         .quad   0xf40e35855771202a,0x106aa07032bbd1b8
 285         .quad   0x19a4c116b8d2d0c8,0x1e376c085141ab53
 286         .quad   0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
 287         .quad   0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
 288         .quad   0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
 289         .quad   0x748f82ee5defb2fc,0x78a5636f43172f60
 290         .quad   0x84c87814a1f0ab72,0x8cc702081a6439ec
 291         .quad   0x90befffa23631e28,0xa4506cebde82bde9
 292         .quad   0xbef9a3f7b2c67915,0xc67178f2e372532b
 293         .quad   0xca273eceea26619c,0xd186b8c721c0c207
 294         .quad   0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
 295         .quad   0x06f067aa72176fba,0x0a637dc5a2c898a6
 296         .quad   0x113f9804bef90dae,0x1b710b35131c471b
 297         .quad   0x28db77f523047d84,0x32caab7b40c72493
 298         .quad   0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
 299         .quad   0x4cc5d4becb3e42b6,0x597f299cfc657e2a
 300         .quad   0x5fcb6fab3ad6faec,0x6c44198c4a475817
 301         .quad   0       // terminator
 302 ___
 303 $code.=<<___ if ($SZ==4);
 304         .long   0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
 305         .long   0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
 306         .long   0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
 307         .long   0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
 308         .long   0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
 309         .long   0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
 310         .long   0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
 311         .long   0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
 312         .long   0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
 313         .long   0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
 314         .long   0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
 315         .long   0xd192e819,0xd6990624,0xf40e3585,0x106aa070
 316         .long   0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
 317         .long   0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
 318         .long   0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
 319         .long   0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 320         .long   0       //terminator
 321 ___
 322 $code.=<<___;
 323 .size   .LK$BITS,.-.LK$BITS
 324 .align  3
 325 .LOPENSSL_armcap_P:
 326 #ifdef  __ILP32__
 327         .long   OPENSSL_armcap_P-.
 328 #else
 329         .quad   OPENSSL_armcap_P-.
 330 #endif
 331 .asciz  "SHA$BITS block transform for ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
 332 .align  2
 333 ___
 334
 335 if ($SZ==4) {
 336 my $Ktbl="x3";
 337
 338 my ($ABCD,$EFGH,$abcd)=map("v$_.16b",(0..2));
 339 my @MSG=map("v$_.16b",(4..7));
 340 my ($W0,$W1)=("v16.4s","v17.4s");
 341 my ($ABCD_SAVE,$EFGH_SAVE)=("v18.16b","v19.16b");
 342
 343 $code.=<<___;
 344 .type   sha256_block_armv8,%function
 345 .align  6
 346 sha256_block_armv8:
 347 .Lv8_entry:
 348         stp             x29,x30,[sp,#-16]!
 349         add             x29,sp,#0
 350
 351         ld1.32          {$ABCD,$EFGH},[$ctx]
 352         adr             $Ktbl,.LK256
 353
 354 .Loop_hw:
 355         ld1             {@MSG[0]-@MSG[3]},[$inp],#64
 356         sub             $num,$num,#1
 357         ld1.32          {$W0},[$Ktbl],#16
 358         rev32           @MSG[0],@MSG[0]
 359         rev32           @MSG[1],@MSG[1]
 360         rev32           @MSG[2],@MSG[2]
 361         rev32           @MSG[3],@MSG[3]
 362         orr             $ABCD_SAVE,$ABCD,$ABCD          // offload
 363         orr             $EFGH_SAVE,$EFGH,$EFGH
 364 ___
 365 for($i=0;$i<12;$i++) {
 366 $code.=<<___;
 367         ld1.32          {$W1},[$Ktbl],#16
 368         add.i32         $W0,$W0,@MSG[0]
 369         sha256su0       @MSG[0],@MSG[1]
 370         orr             $abcd,$ABCD,$ABCD
 371         sha256h         $ABCD,$EFGH,$W0
 372         sha256h2        $EFGH,$abcd,$W0
 373         sha256su1       @MSG[0],@MSG[2],@MSG[3]
 374 ___
 375         ($W0,$W1)=($W1,$W0);    push(@MSG,shift(@MSG));
 376 }
 377 $code.=<<___;
 378         ld1.32          {$W1},[$Ktbl],#16
 379         add.i32         $W0,$W0,@MSG[0]
 380         orr             $abcd,$ABCD,$ABCD
 381         sha256h         $ABCD,$EFGH,$W0
 382         sha256h2        $EFGH,$abcd,$W0
 383
 384         ld1.32          {$W0},[$Ktbl],#16
 385         add.i32         $W1,$W1,@MSG[1]
 386         orr             $abcd,$ABCD,$ABCD
 387         sha256h         $ABCD,$EFGH,$W1
 388         sha256h2        $EFGH,$abcd,$W1
 389
 390         ld1.32          {$W1},[$Ktbl]
 391         add.i32         $W0,$W0,@MSG[2]
 392         sub             $Ktbl,$Ktbl,#$rounds*$SZ-16     // rewind
 393         orr             $abcd,$ABCD,$ABCD
 394         sha256h         $ABCD,$EFGH,$W0
 395         sha256h2        $EFGH,$abcd,$W0
 396
 397         add.i32         $W1,$W1,@MSG[3]
 398         orr             $abcd,$ABCD,$ABCD
 399         sha256h         $ABCD,$EFGH,$W1
 400         sha256h2        $EFGH,$abcd,$W1
 401
 402         add.i32         $ABCD,$ABCD,$ABCD_SAVE
 403         add.i32         $EFGH,$EFGH,$EFGH_SAVE
 404
 405         cbnz            $num,.Loop_hw
 406
 407         st1.32          {$ABCD,$EFGH},[$ctx]
 408
 409         ldr             x29,[sp],#16
 410         ret
 411 .size   sha256_block_armv8,.-sha256_block_armv8
 412 ___
 413 }
 414
 415 $code.=<<___;
 416 .comm   OPENSSL_armcap_P,4,4
 417 ___
 418
 419 {   my  %opcode = (
 420         "sha256h"       => 0x5e004000,  "sha256h2"      => 0x5e005000,
 421         "sha256su0"     => 0x5e282800,  "sha256su1"     => 0x5e006000   );
 422
 423     sub unsha256 {
 424         my ($mnemonic,$arg)=@_;
 425
 426         $arg =~ m/[qv]([0-9]+)[^,]*,\s*[qv]([0-9]+)[^,]*(?:,\s*[qv]([0-9]+))?/o
 427         &&
 428         sprintf ".inst\t0x%08x\t//%s %s",
 429                         $opcode{$mnemonic}|$1|($2<<5)|($3<<16),
 430                         $mnemonic,$arg;
 431     }
 432 }
 433
 434 foreach(split("\n",$code)) {
 435
 436         s/\`([^\`]*)\`/eval($1)/geo;
 437
 438         s/\b(sha256\w+)\s+([qv].*)/unsha256($1,$2)/geo;
 439
 440         s/\.\w?32\b//o          and s/\.16b/\.4s/go;
 441         m/(ld|st)1[^\[]+\[0\]/o and s/\.4s/\.s/go;
 442
 443         print $_,"\n";
 444 }
 445
 446 close STDOUT;