crypto/sha/asm/sha512-armv8.pl

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