crypto/openssl/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 $output=shift;
  34 open STDOUT,">$output";
  35
  36 if ($output =~ /512/) {
  37         $BITS=512;
  38         $SZ=8;
  39         @Sigma0=(28,34,39);
  40         @Sigma1=(14,18,41);
  41         @sigma0=(1,  8, 7);
  42         @sigma1=(19,61, 6);
  43         $rounds=80;
  44         $reg_t="x";
  45 } else {
  46         $BITS=256;
  47         $SZ=4;
  48         @Sigma0=( 2,13,22);
  49         @Sigma1=( 6,11,25);
  50         @sigma0=( 7,18, 3);
  51         @sigma1=(17,19,10);
  52         $rounds=64;
  53         $reg_t="w";
  54 }
  55
  56 $func="sha${BITS}_block_data_order";
  57
  58 ($ctx,$inp,$num,$Ktbl)=map("x$_",(0..2,30));
  59
  60 @X=map("$reg_t$_",(3..15,0..2));
  61 @V=($A,$B,$C,$D,$E,$F,$G,$H)=map("$reg_t$_",(20..27));
  62 ($t0,$t1,$t2,$t3)=map("$reg_t$_",(16,17,19,28));
  63
  64 sub BODY_00_xx {
  65 my ($i,$a,$b,$c,$d,$e,$f,$g,$h)=@_;
  66 my $j=($i+1)&15;
  67 my ($T0,$T1,$T2)=(@X[($i-8)&15],@X[($i-9)&15],@X[($i-10)&15]);
  68    $T0=@X[$i+3] if ($i<11);
  69
  70 $code.=<<___    if ($i<16);
  71 #ifndef __ARMEB__
  72         rev     @X[$i],@X[$i]                   // $i
  73 #endif
  74 ___
  75 $code.=<<___    if ($i<13 && ($i&1));
  76         ldp     @X[$i+1],@X[$i+2],[$inp],#2*$SZ
  77 ___
  78 $code.=<<___    if ($i==13);
  79         ldp     @X[14],@X[15],[$inp]
  80 ___
  81 $code.=<<___    if ($i>=14);
  82         ldr     @X[($i-11)&15],[sp,#`$SZ*(($i-11)%4)`]
  83 ___
  84 $code.=<<___    if ($i>0 && $i<16);
  85         add     $a,$a,$t1                       // h+=Sigma0(a)
  86 ___
  87 $code.=<<___    if ($i>=11);
  88         str     @X[($i-8)&15],[sp,#`$SZ*(($i-8)%4)`]
  89 ___
  90 # While ARMv8 specifies merged rotate-n-logical operation such as
  91 # 'eor x,y,z,ror#n', it was found to negatively affect performance
  92 # on Apple A7. The reason seems to be that it requires even 'y' to
  93 # be available earlier. This means that such merged instruction is
  94 # not necessarily best choice on critical path... On the other hand
  95 # Cortex-A5x handles merged instructions much better than disjoint
  96 # rotate and logical... See (**) footnote above.
  97 $code.=<<___    if ($i<15);
  98         ror     $t0,$e,#$Sigma1[0]
  99         add     $h,$h,$t2                       // h+=K[i]
 100         eor     $T0,$e,$e,ror#`$Sigma1[2]-$Sigma1[1]`
 101         and     $t1,$f,$e
 102         bic     $t2,$g,$e
 103         add     $h,$h,@X[$i&15]                 // h+=X[i]
 104         orr     $t1,$t1,$t2                     // Ch(e,f,g)
 105         eor     $t2,$a,$b                       // a^b, b^c in next round
 106         eor     $t0,$t0,$T0,ror#$Sigma1[1]      // Sigma1(e)
 107         ror     $T0,$a,#$Sigma0[0]
 108         add     $h,$h,$t1                       // h+=Ch(e,f,g)
 109         eor     $t1,$a,$a,ror#`$Sigma0[2]-$Sigma0[1]`
 110         add     $h,$h,$t0                       // h+=Sigma1(e)
 111         and     $t3,$t3,$t2                     // (b^c)&=(a^b)
 112         add     $d,$d,$h                        // d+=h
 113         eor     $t3,$t3,$b                      // Maj(a,b,c)
 114         eor     $t1,$T0,$t1,ror#$Sigma0[1]      // Sigma0(a)
 115         add     $h,$h,$t3                       // h+=Maj(a,b,c)
 116         ldr     $t3,[$Ktbl],#$SZ                // *K++, $t2 in next round
 117         //add   $h,$h,$t1                       // h+=Sigma0(a)
 118 ___
 119 $code.=<<___    if ($i>=15);
 120         ror     $t0,$e,#$Sigma1[0]
 121         add     $h,$h,$t2                       // h+=K[i]
 122         ror     $T1,@X[($j+1)&15],#$sigma0[0]
 123         and     $t1,$f,$e
 124         ror     $T2,@X[($j+14)&15],#$sigma1[0]
 125         bic     $t2,$g,$e
 126         ror     $T0,$a,#$Sigma0[0]
 127         add     $h,$h,@X[$i&15]                 // h+=X[i]
 128         eor     $t0,$t0,$e,ror#$Sigma1[1]
 129         eor     $T1,$T1,@X[($j+1)&15],ror#$sigma0[1]
 130         orr     $t1,$t1,$t2                     // Ch(e,f,g)
 131         eor     $t2,$a,$b                       // a^b, b^c in next round
 132         eor     $t0,$t0,$e,ror#$Sigma1[2]       // Sigma1(e)
 133         eor     $T0,$T0,$a,ror#$Sigma0[1]
 134         add     $h,$h,$t1                       // h+=Ch(e,f,g)
 135         and     $t3,$t3,$t2                     // (b^c)&=(a^b)
 136         eor     $T2,$T2,@X[($j+14)&15],ror#$sigma1[1]
 137         eor     $T1,$T1,@X[($j+1)&15],lsr#$sigma0[2]    // sigma0(X[i+1])
 138         add     $h,$h,$t0                       // h+=Sigma1(e)
 139         eor     $t3,$t3,$b                      // Maj(a,b,c)
 140         eor     $t1,$T0,$a,ror#$Sigma0[2]       // Sigma0(a)
 141         eor     $T2,$T2,@X[($j+14)&15],lsr#$sigma1[2]   // sigma1(X[i+14])
 142         add     @X[$j],@X[$j],@X[($j+9)&15]
 143         add     $d,$d,$h                        // d+=h
 144         add     $h,$h,$t3                       // h+=Maj(a,b,c)
 145         ldr     $t3,[$Ktbl],#$SZ                // *K++, $t2 in next round
 146         add     @X[$j],@X[$j],$T1
 147         add     $h,$h,$t1                       // h+=Sigma0(a)
 148         add     @X[$j],@X[$j],$T2
 149 ___
 150         ($t2,$t3)=($t3,$t2);
 151 }
 152
 153 $code.=<<___;
 154 #include "arm_arch.h"
 155
 156 .text
 157
 158 .globl  $func
 159 .type   $func,%function
 160 .align  6
 161 $func:
 162 ___
 163 $code.=<<___    if ($SZ==4);
 164         ldr     x16,.LOPENSSL_armcap_P
 165         adr     x17,.LOPENSSL_armcap_P
 166         add     x16,x16,x17
 167         ldr     w16,[x16]
 168         tst     w16,#ARMV8_SHA256
 169         b.ne    .Lv8_entry
 170 ___
 171 $code.=<<___;
 172         stp     x29,x30,[sp,#-128]!
 173         add     x29,sp,#0
 174
 175         stp     x19,x20,[sp,#16]
 176         stp     x21,x22,[sp,#32]
 177         stp     x23,x24,[sp,#48]
 178         stp     x25,x26,[sp,#64]
 179         stp     x27,x28,[sp,#80]
 180         sub     sp,sp,#4*$SZ
 181
 182         ldp     $A,$B,[$ctx]                            // load context
 183         ldp     $C,$D,[$ctx,#2*$SZ]
 184         ldp     $E,$F,[$ctx,#4*$SZ]
 185         add     $num,$inp,$num,lsl#`log(16*$SZ)/log(2)` // end of input
 186         ldp     $G,$H,[$ctx,#6*$SZ]
 187         adr     $Ktbl,K$BITS
 188         stp     $ctx,$num,[x29,#96]
 189
 190 .Loop:
 191         ldp     @X[0],@X[1],[$inp],#2*$SZ
 192         ldr     $t2,[$Ktbl],#$SZ                        // *K++
 193         eor     $t3,$B,$C                               // magic seed
 194         str     $inp,[x29,#112]
 195 ___
 196 for ($i=0;$i<16;$i++)   { &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
 197 $code.=".Loop_16_xx:\n";
 198 for (;$i<32;$i++)       { &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
 199 $code.=<<___;
 200         cbnz    $t2,.Loop_16_xx
 201
 202         ldp     $ctx,$num,[x29,#96]
 203         ldr     $inp,[x29,#112]
 204         sub     $Ktbl,$Ktbl,#`$SZ*($rounds+1)`          // rewind
 205
 206         ldp     @X[0],@X[1],[$ctx]
 207         ldp     @X[2],@X[3],[$ctx,#2*$SZ]
 208         add     $inp,$inp,#14*$SZ                       // advance input pointer
 209         ldp     @X[4],@X[5],[$ctx,#4*$SZ]
 210         add     $A,$A,@X[0]
 211         ldp     @X[6],@X[7],[$ctx,#6*$SZ]
 212         add     $B,$B,@X[1]
 213         add     $C,$C,@X[2]
 214         add     $D,$D,@X[3]
 215         stp     $A,$B,[$ctx]
 216         add     $E,$E,@X[4]
 217         add     $F,$F,@X[5]
 218         stp     $C,$D,[$ctx,#2*$SZ]
 219         add     $G,$G,@X[6]
 220         add     $H,$H,@X[7]
 221         cmp     $inp,$num
 222         stp     $E,$F,[$ctx,#4*$SZ]
 223         stp     $G,$H,[$ctx,#6*$SZ]
 224         b.ne    .Loop
 225
 226         ldp     x19,x20,[x29,#16]
 227         add     sp,sp,#4*$SZ
 228         ldp     x21,x22,[x29,#32]
 229         ldp     x23,x24,[x29,#48]
 230         ldp     x25,x26,[x29,#64]
 231         ldp     x27,x28,[x29,#80]
 232         ldp     x29,x30,[sp],#128
 233         ret
 234 .size   $func,.-$func
 235
 236 .align  6
 237 .type   K$BITS,%object
 238 K$BITS:
 239 ___
 240 $code.=<<___ if ($SZ==8);
 241         .quad   0x428a2f98d728ae22,0x7137449123ef65cd
 242         .quad   0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
 243         .quad   0x3956c25bf348b538,0x59f111f1b605d019
 244         .quad   0x923f82a4af194f9b,0xab1c5ed5da6d8118
 245         .quad   0xd807aa98a3030242,0x12835b0145706fbe
 246         .quad   0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
 247         .quad   0x72be5d74f27b896f,0x80deb1fe3b1696b1
 248         .quad   0x9bdc06a725c71235,0xc19bf174cf692694
 249         .quad   0xe49b69c19ef14ad2,0xefbe4786384f25e3
 250         .quad   0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
 251         .quad   0x2de92c6f592b0275,0x4a7484aa6ea6e483
 252         .quad   0x5cb0a9dcbd41fbd4,0x76f988da831153b5
 253         .quad   0x983e5152ee66dfab,0xa831c66d2db43210
 254         .quad   0xb00327c898fb213f,0xbf597fc7beef0ee4
 255         .quad   0xc6e00bf33da88fc2,0xd5a79147930aa725
 256         .quad   0x06ca6351e003826f,0x142929670a0e6e70
 257         .quad   0x27b70a8546d22ffc,0x2e1b21385c26c926
 258         .quad   0x4d2c6dfc5ac42aed,0x53380d139d95b3df
 259         .quad   0x650a73548baf63de,0x766a0abb3c77b2a8
 260         .quad   0x81c2c92e47edaee6,0x92722c851482353b
 261         .quad   0xa2bfe8a14cf10364,0xa81a664bbc423001
 262         .quad   0xc24b8b70d0f89791,0xc76c51a30654be30
 263         .quad   0xd192e819d6ef5218,0xd69906245565a910
 264         .quad   0xf40e35855771202a,0x106aa07032bbd1b8
 265         .quad   0x19a4c116b8d2d0c8,0x1e376c085141ab53
 266         .quad   0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
 267         .quad   0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
 268         .quad   0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
 269         .quad   0x748f82ee5defb2fc,0x78a5636f43172f60
 270         .quad   0x84c87814a1f0ab72,0x8cc702081a6439ec
 271         .quad   0x90befffa23631e28,0xa4506cebde82bde9
 272         .quad   0xbef9a3f7b2c67915,0xc67178f2e372532b
 273         .quad   0xca273eceea26619c,0xd186b8c721c0c207
 274         .quad   0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
 275         .quad   0x06f067aa72176fba,0x0a637dc5a2c898a6
 276         .quad   0x113f9804bef90dae,0x1b710b35131c471b
 277         .quad   0x28db77f523047d84,0x32caab7b40c72493
 278         .quad   0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
 279         .quad   0x4cc5d4becb3e42b6,0x597f299cfc657e2a
 280         .quad   0x5fcb6fab3ad6faec,0x6c44198c4a475817
 281         .quad   0       // terminator
 282 ___
 283 $code.=<<___ if ($SZ==4);
 284         .long   0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
 285         .long   0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
 286         .long   0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
 287         .long   0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
 288         .long   0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
 289         .long   0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
 290         .long   0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
 291         .long   0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
 292         .long   0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
 293         .long   0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
 294         .long   0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
 295         .long   0xd192e819,0xd6990624,0xf40e3585,0x106aa070
 296         .long   0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
 297         .long   0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
 298         .long   0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
 299         .long   0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 300         .long   0       //terminator
 301 ___
 302 $code.=<<___;
 303 .size   K$BITS,.-K$BITS
 304 .align  3
 305 .LOPENSSL_armcap_P:
 306         .quad   OPENSSL_armcap_P-.
 307 .asciz  "SHA$BITS block transform for ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
 308 .align  2
 309 ___
 310
 311 if ($SZ==4) {
 312 my $Ktbl="x3";
 313
 314 my ($ABCD,$EFGH,$abcd)=map("v$_.16b",(0..2));
 315 my @MSG=map("v$_.16b",(4..7));
 316 my ($W0,$W1)=("v16.4s","v17.4s");
 317 my ($ABCD_SAVE,$EFGH_SAVE)=("v18.16b","v19.16b");
 318
 319 $code.=<<___;
 320 .type   sha256_block_armv8,%function
 321 .align  6
 322 sha256_block_armv8:
 323 .Lv8_entry:
 324         stp             x29,x30,[sp,#-16]!
 325         add             x29,sp,#0
 326
 327         ld1.32          {$ABCD,$EFGH},[$ctx]
 328         adr             $Ktbl,K256
 329
 330 .Loop_hw:
 331         ld1             {@MSG[0]-@MSG[3]},[$inp],#64
 332         sub             $num,$num,#1
 333         ld1.32          {$W0},[$Ktbl],#16
 334         rev32           @MSG[0],@MSG[0]
 335         rev32           @MSG[1],@MSG[1]
 336         rev32           @MSG[2],@MSG[2]
 337         rev32           @MSG[3],@MSG[3]
 338         orr             $ABCD_SAVE,$ABCD,$ABCD          // offload
 339         orr             $EFGH_SAVE,$EFGH,$EFGH
 340 ___
 341 for($i=0;$i<12;$i++) {
 342 $code.=<<___;
 343         ld1.32          {$W1},[$Ktbl],#16
 344         add.i32         $W0,$W0,@MSG[0]
 345         sha256su0       @MSG[0],@MSG[1]
 346         orr             $abcd,$ABCD,$ABCD
 347         sha256h         $ABCD,$EFGH,$W0
 348         sha256h2        $EFGH,$abcd,$W0
 349         sha256su1       @MSG[0],@MSG[2],@MSG[3]
 350 ___
 351         ($W0,$W1)=($W1,$W0);    push(@MSG,shift(@MSG));
 352 }
 353 $code.=<<___;
 354         ld1.32          {$W1},[$Ktbl],#16
 355         add.i32         $W0,$W0,@MSG[0]
 356         orr             $abcd,$ABCD,$ABCD
 357         sha256h         $ABCD,$EFGH,$W0
 358         sha256h2        $EFGH,$abcd,$W0
 359
 360         ld1.32          {$W0},[$Ktbl],#16
 361         add.i32         $W1,$W1,@MSG[1]
 362         orr             $abcd,$ABCD,$ABCD
 363         sha256h         $ABCD,$EFGH,$W1
 364         sha256h2        $EFGH,$abcd,$W1
 365
 366         ld1.32          {$W1},[$Ktbl]
 367         add.i32         $W0,$W0,@MSG[2]
 368         sub             $Ktbl,$Ktbl,#$rounds*$SZ-16     // rewind
 369         orr             $abcd,$ABCD,$ABCD
 370         sha256h         $ABCD,$EFGH,$W0
 371         sha256h2        $EFGH,$abcd,$W0
 372
 373         add.i32         $W1,$W1,@MSG[3]
 374         orr             $abcd,$ABCD,$ABCD
 375         sha256h         $ABCD,$EFGH,$W1
 376         sha256h2        $EFGH,$abcd,$W1
 377
 378         add.i32         $ABCD,$ABCD,$ABCD_SAVE
 379         add.i32         $EFGH,$EFGH,$EFGH_SAVE
 380
 381         cbnz            $num,.Loop_hw
 382
 383         st1.32          {$ABCD,$EFGH},[$ctx]
 384
 385         ldr             x29,[sp],#16
 386         ret
 387 .size   sha256_block_armv8,.-sha256_block_armv8
 388 ___
 389 }
 390
 391 $code.=<<___;
 392 .comm   OPENSSL_armcap_P,4,4
 393 ___
 394
 395 {   my  %opcode = (
 396         "sha256h"       => 0x5e004000,  "sha256h2"      => 0x5e005000,
 397         "sha256su0"     => 0x5e282800,  "sha256su1"     => 0x5e006000   );
 398
 399     sub unsha256 {
 400         my ($mnemonic,$arg)=@_;
 401
 402         $arg =~ m/[qv]([0-9]+)[^,]*,\s*[qv]([0-9]+)[^,]*(?:,\s*[qv]([0-9]+))?/o
 403         &&
 404         sprintf ".inst\t0x%08x\t//%s %s",
 405                         $opcode{$mnemonic}|$1|($2<<5)|($3<<16),
 406                         $mnemonic,$arg;
 407     }
 408 }
 409
 410 foreach(split("\n",$code)) {
 411
 412         s/\`([^\`]*)\`/eval($1)/geo;
 413
 414         s/\b(sha256\w+)\s+([qv].*)/unsha256($1,$2)/geo;
 415
 416         s/\.\w?32\b//o          and s/\.16b/\.4s/go;
 417         m/(ld|st)1[^\[]+\[0\]/o and s/\.4s/\.s/go;
 418
 419         print $_,"\n";
 420 }
 421
 422 close STDOUT;