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            15.6 (+110%)    10.1 (+190%(***))
  18 # Cortex-A57    2.31            11.6 (+86%)     7.51 (+260%(***))
  19 #
  20 # (*)   Software SHA256 results are of lesser relevance, presented
  21 #       mostly for informational purposes.
  22 # (**)  The result is a trade-off: it's possible to improve it by
  23 #       10% (or by 1 cycle per round), but at the cost of 20% loss
  24 #       on Cortex-A53 (or by 4 cycles per round).
  25 # (***) Super-impressive coefficients over gcc-generated code are
  26 #       indication of some compiler "pathology", most notably code
  27 #       generated with -mgeneral-regs-only is significanty faster
  28 #       and lags behind assembly only by 50-90%.
  29
  30 $flavour=shift;
  31 $output=shift;
  32 open STDOUT,">$output";
  33
  34 if ($output =~ /512/) {
  35         $BITS=512;
  36         $SZ=8;
  37         @Sigma0=(28,34,39);
  38         @Sigma1=(14,18,41);
  39         @sigma0=(1,  8, 7);
  40         @sigma1=(19,61, 6);
  41         $rounds=80;
  42         $reg_t="x";
  43 } else {
  44         $BITS=256;
  45         $SZ=4;
  46         @Sigma0=( 2,13,22);
  47         @Sigma1=( 6,11,25);
  48         @sigma0=( 7,18, 3);
  49         @sigma1=(17,19,10);
  50         $rounds=64;
  51         $reg_t="w";
  52 }
  53
  54 $func="sha${BITS}_block_data_order";
  55
  56 ($ctx,$inp,$num,$Ktbl)=map("x$_",(0..2,30));
  57
  58 @X=map("$reg_t$_",(3..15,0..2));
  59 @V=($A,$B,$C,$D,$E,$F,$G,$H)=map("$reg_t$_",(20..27));
  60 ($t0,$t1,$t2,$t3)=map("$reg_t$_",(16,17,19,28));
  61
  62 sub BODY_00_xx {
  63 my ($i,$a,$b,$c,$d,$e,$f,$g,$h)=@_;
  64 my $j=($i+1)&15;
  65 my ($T0,$T1,$T2)=(@X[($i-8)&15],@X[($i-9)&15],@X[($i-10)&15]);
  66    $T0=@X[$i+3] if ($i<11);
  67
  68 $code.=<<___    if ($i<16);
  69 #ifndef __ARMEB__
  70         rev     @X[$i],@X[$i]                   // $i
  71 #endif
  72 ___
  73 $code.=<<___    if ($i<13 && ($i&1));
  74         ldp     @X[$i+1],@X[$i+2],[$inp],#2*$SZ
  75 ___
  76 $code.=<<___    if ($i==13);
  77         ldp     @X[14],@X[15],[$inp]
  78 ___
  79 $code.=<<___    if ($i>=14);
  80         ldr     @X[($i-11)&15],[sp,#`$SZ*(($i-11)%4)`]
  81 ___
  82 $code.=<<___    if ($i>0 && $i<16);
  83         add     $a,$a,$t1                       // h+=Sigma0(a)
  84 ___
  85 $code.=<<___    if ($i>=11);
  86         str     @X[($i-8)&15],[sp,#`$SZ*(($i-8)%4)`]
  87 ___
  88 # While ARMv8 specifies merged rotate-n-logical operation such as
  89 # 'eor x,y,z,ror#n', it was found to negatively affect performance
  90 # on Apple A7. The reason seems to be that it requires even 'y' to
  91 # be available earlier. This means that such merged instruction is
  92 # not necessarily best choice on critical path... On the other hand
  93 # Cortex-A5x handles merged instructions much better than disjoint
  94 # rotate and logical... See (**) footnote above.
  95 $code.=<<___    if ($i<15);
  96         ror     $t0,$e,#$Sigma1[0]
  97         add     $h,$h,$t2                       // h+=K[i]
  98         eor     $T0,$e,$e,ror#`$Sigma1[2]-$Sigma1[1]`
  99         and     $t1,$f,$e
 100         bic     $t2,$g,$e
 101         add     $h,$h,@X[$i&15]                 // h+=X[i]
 102         orr     $t1,$t1,$t2                     // Ch(e,f,g)
 103         eor     $t2,$a,$b                       // a^b, b^c in next round
 104         eor     $t0,$t0,$T0,ror#$Sigma1[1]      // Sigma1(e)
 105         ror     $T0,$a,#$Sigma0[0]
 106         add     $h,$h,$t1                       // h+=Ch(e,f,g)
 107         eor     $t1,$a,$a,ror#`$Sigma0[2]-$Sigma0[1]`
 108         add     $h,$h,$t0                       // h+=Sigma1(e)
 109         and     $t3,$t3,$t2                     // (b^c)&=(a^b)
 110         add     $d,$d,$h                        // d+=h
 111         eor     $t3,$t3,$b                      // Maj(a,b,c)
 112         eor     $t1,$T0,$t1,ror#$Sigma0[1]      // Sigma0(a)
 113         add     $h,$h,$t3                       // h+=Maj(a,b,c)
 114         ldr     $t3,[$Ktbl],#$SZ                // *K++, $t2 in next round
 115         //add   $h,$h,$t1                       // h+=Sigma0(a)
 116 ___
 117 $code.=<<___    if ($i>=15);
 118         ror     $t0,$e,#$Sigma1[0]
 119         add     $h,$h,$t2                       // h+=K[i]
 120         ror     $T1,@X[($j+1)&15],#$sigma0[0]
 121         and     $t1,$f,$e
 122         ror     $T2,@X[($j+14)&15],#$sigma1[0]
 123         bic     $t2,$g,$e
 124         ror     $T0,$a,#$Sigma0[0]
 125         add     $h,$h,@X[$i&15]                 // h+=X[i]
 126         eor     $t0,$t0,$e,ror#$Sigma1[1]
 127         eor     $T1,$T1,@X[($j+1)&15],ror#$sigma0[1]
 128         orr     $t1,$t1,$t2                     // Ch(e,f,g)
 129         eor     $t2,$a,$b                       // a^b, b^c in next round
 130         eor     $t0,$t0,$e,ror#$Sigma1[2]       // Sigma1(e)
 131         eor     $T0,$T0,$a,ror#$Sigma0[1]
 132         add     $h,$h,$t1                       // h+=Ch(e,f,g)
 133         and     $t3,$t3,$t2                     // (b^c)&=(a^b)
 134         eor     $T2,$T2,@X[($j+14)&15],ror#$sigma1[1]
 135         eor     $T1,$T1,@X[($j+1)&15],lsr#$sigma0[2]    // sigma0(X[i+1])
 136         add     $h,$h,$t0                       // h+=Sigma1(e)
 137         eor     $t3,$t3,$b                      // Maj(a,b,c)
 138         eor     $t1,$T0,$a,ror#$Sigma0[2]       // Sigma0(a)
 139         eor     $T2,$T2,@X[($j+14)&15],lsr#$sigma1[2]   // sigma1(X[i+14])
 140         add     @X[$j],@X[$j],@X[($j+9)&15]
 141         add     $d,$d,$h                        // d+=h
 142         add     $h,$h,$t3                       // h+=Maj(a,b,c)
 143         ldr     $t3,[$Ktbl],#$SZ                // *K++, $t2 in next round
 144         add     @X[$j],@X[$j],$T1
 145         add     $h,$h,$t1                       // h+=Sigma0(a)
 146         add     @X[$j],@X[$j],$T2
 147 ___
 148         ($t2,$t3)=($t3,$t2);
 149 }
 150
 151 $code.=<<___;
 152 #include "arm_arch.h"
 153
 154 .text
 155
 156 .globl  $func
 157 .type   $func,%function
 158 .align  6
 159 $func:
 160 ___
 161 $code.=<<___    if ($SZ==4);
 162         ldr     x16,.LOPENSSL_armcap_P
 163         adr     x17,.LOPENSSL_armcap_P
 164         add     x16,x16,x17
 165         ldr     w16,[x16]
 166         tst     w16,#ARMV8_SHA256
 167         b.ne    .Lv8_entry
 168 ___
 169 $code.=<<___;
 170         stp     x29,x30,[sp,#-128]!
 171         add     x29,sp,#0
 172
 173         stp     x19,x20,[sp,#16]
 174         stp     x21,x22,[sp,#32]
 175         stp     x23,x24,[sp,#48]
 176         stp     x25,x26,[sp,#64]
 177         stp     x27,x28,[sp,#80]
 178         sub     sp,sp,#4*$SZ
 179
 180         ldp     $A,$B,[$ctx]                            // load context
 181         ldp     $C,$D,[$ctx,#2*$SZ]
 182         ldp     $E,$F,[$ctx,#4*$SZ]
 183         add     $num,$inp,$num,lsl#`log(16*$SZ)/log(2)` // end of input
 184         ldp     $G,$H,[$ctx,#6*$SZ]
 185         adr     $Ktbl,K$BITS
 186         stp     $ctx,$num,[x29,#96]
 187
 188 .Loop:
 189         ldp     @X[0],@X[1],[$inp],#2*$SZ
 190         ldr     $t2,[$Ktbl],#$SZ                        // *K++
 191         eor     $t3,$B,$C                               // magic seed
 192         str     $inp,[x29,#112]
 193 ___
 194 for ($i=0;$i<16;$i++)   { &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
 195 $code.=".Loop_16_xx:\n";
 196 for (;$i<32;$i++)       { &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
 197 $code.=<<___;
 198         cbnz    $t2,.Loop_16_xx
 199
 200         ldp     $ctx,$num,[x29,#96]
 201         ldr     $inp,[x29,#112]
 202         sub     $Ktbl,$Ktbl,#`$SZ*($rounds+1)`          // rewind
 203
 204         ldp     @X[0],@X[1],[$ctx]
 205         ldp     @X[2],@X[3],[$ctx,#2*$SZ]
 206         add     $inp,$inp,#14*$SZ                       // advance input pointer
 207         ldp     @X[4],@X[5],[$ctx,#4*$SZ]
 208         add     $A,$A,@X[0]
 209         ldp     @X[6],@X[7],[$ctx,#6*$SZ]
 210         add     $B,$B,@X[1]
 211         add     $C,$C,@X[2]
 212         add     $D,$D,@X[3]
 213         stp     $A,$B,[$ctx]
 214         add     $E,$E,@X[4]
 215         add     $F,$F,@X[5]
 216         stp     $C,$D,[$ctx,#2*$SZ]
 217         add     $G,$G,@X[6]
 218         add     $H,$H,@X[7]
 219         cmp     $inp,$num
 220         stp     $E,$F,[$ctx,#4*$SZ]
 221         stp     $G,$H,[$ctx,#6*$SZ]
 222         b.ne    .Loop
 223
 224         ldp     x19,x20,[x29,#16]
 225         add     sp,sp,#4*$SZ
 226         ldp     x21,x22,[x29,#32]
 227         ldp     x23,x24,[x29,#48]
 228         ldp     x25,x26,[x29,#64]
 229         ldp     x27,x28,[x29,#80]
 230         ldp     x29,x30,[sp],#128
 231         ret
 232 .size   $func,.-$func
 233
 234 .align  6
 235 .type   K$BITS,%object
 236 K$BITS:
 237 ___
 238 $code.=<<___ if ($SZ==8);
 239         .quad   0x428a2f98d728ae22,0x7137449123ef65cd
 240         .quad   0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
 241         .quad   0x3956c25bf348b538,0x59f111f1b605d019
 242         .quad   0x923f82a4af194f9b,0xab1c5ed5da6d8118
 243         .quad   0xd807aa98a3030242,0x12835b0145706fbe
 244         .quad   0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
 245         .quad   0x72be5d74f27b896f,0x80deb1fe3b1696b1
 246         .quad   0x9bdc06a725c71235,0xc19bf174cf692694
 247         .quad   0xe49b69c19ef14ad2,0xefbe4786384f25e3
 248         .quad   0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
 249         .quad   0x2de92c6f592b0275,0x4a7484aa6ea6e483
 250         .quad   0x5cb0a9dcbd41fbd4,0x76f988da831153b5
 251         .quad   0x983e5152ee66dfab,0xa831c66d2db43210
 252         .quad   0xb00327c898fb213f,0xbf597fc7beef0ee4
 253         .quad   0xc6e00bf33da88fc2,0xd5a79147930aa725
 254         .quad   0x06ca6351e003826f,0x142929670a0e6e70
 255         .quad   0x27b70a8546d22ffc,0x2e1b21385c26c926
 256         .quad   0x4d2c6dfc5ac42aed,0x53380d139d95b3df
 257         .quad   0x650a73548baf63de,0x766a0abb3c77b2a8
 258         .quad   0x81c2c92e47edaee6,0x92722c851482353b
 259         .quad   0xa2bfe8a14cf10364,0xa81a664bbc423001
 260         .quad   0xc24b8b70d0f89791,0xc76c51a30654be30
 261         .quad   0xd192e819d6ef5218,0xd69906245565a910
 262         .quad   0xf40e35855771202a,0x106aa07032bbd1b8
 263         .quad   0x19a4c116b8d2d0c8,0x1e376c085141ab53
 264         .quad   0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
 265         .quad   0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
 266         .quad   0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
 267         .quad   0x748f82ee5defb2fc,0x78a5636f43172f60
 268         .quad   0x84c87814a1f0ab72,0x8cc702081a6439ec
 269         .quad   0x90befffa23631e28,0xa4506cebde82bde9
 270         .quad   0xbef9a3f7b2c67915,0xc67178f2e372532b
 271         .quad   0xca273eceea26619c,0xd186b8c721c0c207
 272         .quad   0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
 273         .quad   0x06f067aa72176fba,0x0a637dc5a2c898a6
 274         .quad   0x113f9804bef90dae,0x1b710b35131c471b
 275         .quad   0x28db77f523047d84,0x32caab7b40c72493
 276         .quad   0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
 277         .quad   0x4cc5d4becb3e42b6,0x597f299cfc657e2a
 278         .quad   0x5fcb6fab3ad6faec,0x6c44198c4a475817
 279         .quad   0       // terminator
 280 ___
 281 $code.=<<___ if ($SZ==4);
 282         .long   0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
 283         .long   0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
 284         .long   0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
 285         .long   0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
 286         .long   0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
 287         .long   0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
 288         .long   0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
 289         .long   0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
 290         .long   0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
 291         .long   0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
 292         .long   0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
 293         .long   0xd192e819,0xd6990624,0xf40e3585,0x106aa070
 294         .long   0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
 295         .long   0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
 296         .long   0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
 297         .long   0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 298         .long   0       //terminator
 299 ___
 300 $code.=<<___;
 301 .size   K$BITS,.-K$BITS
 302 .align  3
 303 .LOPENSSL_armcap_P:
 304         .quad   OPENSSL_armcap_P-.
 305 .asciz  "SHA$BITS block transform for ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
 306 .align  2
 307 ___
 308
 309 if ($SZ==4) {
 310 my $Ktbl="x3";
 311
 312 my ($ABCD,$EFGH,$abcd)=map("v$_.16b",(0..2));
 313 my @MSG=map("v$_.16b",(4..7));
 314 my ($W0,$W1)=("v16.4s","v17.4s");
 315 my ($ABCD_SAVE,$EFGH_SAVE)=("v18.16b","v19.16b");
 316
 317 $code.=<<___;
 318 .type   sha256_block_armv8,%function
 319 .align  6
 320 sha256_block_armv8:
 321 .Lv8_entry:
 322         stp             x29,x30,[sp,#-16]!
 323         add             x29,sp,#0
 324
 325         ld1.32          {$ABCD,$EFGH},[$ctx]
 326         adr             $Ktbl,K256
 327
 328 .Loop_hw:
 329         ld1             {@MSG[0]-@MSG[3]},[$inp],#64
 330         sub             $num,$num,#1
 331         ld1.32          {$W0},[$Ktbl],#16
 332         rev32           @MSG[0],@MSG[0]
 333         rev32           @MSG[1],@MSG[1]
 334         rev32           @MSG[2],@MSG[2]
 335         rev32           @MSG[3],@MSG[3]
 336         orr             $ABCD_SAVE,$ABCD,$ABCD          // offload
 337         orr             $EFGH_SAVE,$EFGH,$EFGH
 338 ___
 339 for($i=0;$i<12;$i++) {
 340 $code.=<<___;
 341         ld1.32          {$W1},[$Ktbl],#16
 342         add.i32         $W0,$W0,@MSG[0]
 343         sha256su0       @MSG[0],@MSG[1]
 344         orr             $abcd,$ABCD,$ABCD
 345         sha256h         $ABCD,$EFGH,$W0
 346         sha256h2        $EFGH,$abcd,$W0
 347         sha256su1       @MSG[0],@MSG[2],@MSG[3]
 348 ___
 349         ($W0,$W1)=($W1,$W0);    push(@MSG,shift(@MSG));
 350 }
 351 $code.=<<___;
 352         ld1.32          {$W1},[$Ktbl],#16
 353         add.i32         $W0,$W0,@MSG[0]
 354         orr             $abcd,$ABCD,$ABCD
 355         sha256h         $ABCD,$EFGH,$W0
 356         sha256h2        $EFGH,$abcd,$W0
 357
 358         ld1.32          {$W0},[$Ktbl],#16
 359         add.i32         $W1,$W1,@MSG[1]
 360         orr             $abcd,$ABCD,$ABCD
 361         sha256h         $ABCD,$EFGH,$W1
 362         sha256h2        $EFGH,$abcd,$W1
 363
 364         ld1.32          {$W1},[$Ktbl]
 365         add.i32         $W0,$W0,@MSG[2]
 366         sub             $Ktbl,$Ktbl,#$rounds*$SZ-16     // rewind
 367         orr             $abcd,$ABCD,$ABCD
 368         sha256h         $ABCD,$EFGH,$W0
 369         sha256h2        $EFGH,$abcd,$W0
 370
 371         add.i32         $W1,$W1,@MSG[3]
 372         orr             $abcd,$ABCD,$ABCD
 373         sha256h         $ABCD,$EFGH,$W1
 374         sha256h2        $EFGH,$abcd,$W1
 375
 376         add.i32         $ABCD,$ABCD,$ABCD_SAVE
 377         add.i32         $EFGH,$EFGH,$EFGH_SAVE
 378
 379         cbnz            $num,.Loop_hw
 380
 381         st1.32          {$ABCD,$EFGH},[$ctx]
 382
 383         ldr             x29,[sp],#16
 384         ret
 385 .size   sha256_block_armv8,.-sha256_block_armv8
 386 ___
 387 }
 388
 389 $code.=<<___;
 390 .comm   OPENSSL_armcap_P,4,4
 391 ___
 392
 393 {   my  %opcode = (
 394         "sha256h"       => 0x5e004000,  "sha256h2"      => 0x5e005000,
 395         "sha256su0"     => 0x5e282800,  "sha256su1"     => 0x5e006000   );
 396
 397     sub unsha256 {
 398         my ($mnemonic,$arg)=@_;
 399
 400         $arg =~ m/[qv]([0-9]+)[^,]*,\s*[qv]([0-9]+)[^,]*(?:,\s*[qv]([0-9]+))?/o
 401         &&
 402         sprintf ".inst\t0x%08x\t//%s %s",
 403                         $opcode{$mnemonic}|$1|($2<<5)|($3<<16),
 404                         $mnemonic,$arg;
 405     }
 406 }
 407
 408 foreach(split("\n",$code)) {
 409
 410         s/\`([^\`]*)\`/eval($1)/geo;
 411
 412         s/\b(sha256\w+)\s+([qv].*)/unsha256($1,$2)/geo;
 413
 414         s/\.\w?32\b//o          and s/\.16b/\.4s/go;
 415         m/(ld|st)1[^\[]+\[0\]/o and s/\.4s/\.s/go;
 416
 417         print $_,"\n";
 418 }
 419
 420 close STDOUT;