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 # Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
  11 # project. The module is, however, dual licensed under OpenSSL and
  12 # CRYPTOGAMS licenses depending on where you obtain it. For further
  13 # details see http://www.openssl.org/~appro/cryptogams/.
  14 #
  15 # Permission to use under GPLv2 terms is granted.
  16 # ====================================================================
  17 #
  18 # SHA256/512 for ARMv8.
  19 #
  20 # Performance in cycles per processed byte and improvement coefficient
  21 # over code generated with "default" compiler:
  22 #
  23 #               SHA256-hw       SHA256(*)       SHA512
  24 # Apple A7      1.97            10.5 (+33%)     6.73 (-1%(**))
  25 # Cortex-A53    2.38            15.5 (+115%)    10.0 (+150%(***))
  26 # Cortex-A57    2.31            11.6 (+86%)     7.51 (+260%(***))
  27 # Denver        2.01            10.5 (+26%)     6.70 (+8%)
  28 # X-Gene                        20.0 (+100%)    12.8 (+300%(***))
  29 # Mongoose      2.36            13.0 (+50%)     8.36 (+33%)
  30 #
  31 # (*)   Software SHA256 results are of lesser relevance, presented
  32 #       mostly for informational purposes.
  33 # (**)  The result is a trade-off: it's possible to improve it by
  34 #       10% (or by 1 cycle per round), but at the cost of 20% loss
  35 #       on Cortex-A53 (or by 4 cycles per round).
  36 # (***) Super-impressive coefficients over gcc-generated code are
  37 #       indication of some compiler "pathology", most notably code
  38 #       generated with -mgeneral-regs-only is significantly faster
  39 #       and the gap is only 40-90%.
  40 #
  41 # October 2016.
  42 #
  43 # Originally it was reckoned that it makes no sense to implement NEON
  44 # version of SHA256 for 64-bit processors. This is because performance
  45 # improvement on most wide-spread Cortex-A5x processors was observed
  46 # to be marginal, same on Cortex-A53 and ~10% on A57. But then it was
  47 # observed that 32-bit NEON SHA256 performs significantly better than
  48 # 64-bit scalar version on *some* of the more recent processors. As
  49 # result 64-bit NEON version of SHA256 was added to provide best
  50 # all-round performance. For example it executes ~30% faster on X-Gene
  51 # and Mongoose. [For reference, NEON version of SHA512 is bound to
  52 # deliver much less improvement, likely *negative* on Cortex-A5x.
  53 # Which is why NEON support is limited to SHA256.]
  54
  55 $output=pop;
  56 $flavour=pop;
  57
  58 if ($flavour && $flavour ne "void") {
  59     $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  60     ( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
  61     ( $xlate="${dir}../../perlasm/arm-xlate.pl" and -f $xlate) or
  62     die "can't locate arm-xlate.pl";
  63
  64     open OUT,"| \"$^X\" $xlate $flavour $output";
  65     *STDOUT=*OUT;
  66 } else {
  67     open STDOUT,">$output";
  68 }
  69
  70 if ($output =~ /512/) {
  71         $BITS=512;
  72         $SZ=8;
  73         @Sigma0=(28,34,39);
  74         @Sigma1=(14,18,41);
  75         @sigma0=(1,  8, 7);
  76         @sigma1=(19,61, 6);
  77         $rounds=80;
  78         $reg_t="x";
  79 } else {
  80         $BITS=256;
  81         $SZ=4;
  82         @Sigma0=( 2,13,22);
  83         @Sigma1=( 6,11,25);
  84         @sigma0=( 7,18, 3);
  85         @sigma1=(17,19,10);
  86         $rounds=64;
  87         $reg_t="w";
  88 }
  89
  90 $func="sha${BITS}_block_data_order";
  91
  92 ($ctx,$inp,$num,$Ktbl)=map("x$_",(0..2,30));
  93
  94 @X=map("$reg_t$_",(3..15,0..2));
  95 @V=($A,$B,$C,$D,$E,$F,$G,$H)=map("$reg_t$_",(20..27));
  96 ($t0,$t1,$t2,$t3)=map("$reg_t$_",(16,17,19,28));
  97
  98 sub BODY_00_xx {
  99 my ($i,$a,$b,$c,$d,$e,$f,$g,$h)=@_;
 100 my $j=($i+1)&15;
 101 my ($T0,$T1,$T2)=(@X[($i-8)&15],@X[($i-9)&15],@X[($i-10)&15]);
 102    $T0=@X[$i+3] if ($i<11);
 103
 104 $code.=<<___    if ($i<16);
 105 #ifndef __AARCH64EB__
 106         rev     @X[$i],@X[$i]                   // $i
 107 #endif
 108 ___
 109 $code.=<<___    if ($i<13 && ($i&1));
 110         ldp     @X[$i+1],@X[$i+2],[$inp],#2*$SZ
 111 ___
 112 $code.=<<___    if ($i==13);
 113         ldp     @X[14],@X[15],[$inp]
 114 ___
 115 $code.=<<___    if ($i>=14);
 116         ldr     @X[($i-11)&15],[sp,#`$SZ*(($i-11)%4)`]
 117 ___
 118 $code.=<<___    if ($i>0 && $i<16);
 119         add     $a,$a,$t1                       // h+=Sigma0(a)
 120 ___
 121 $code.=<<___    if ($i>=11);
 122         str     @X[($i-8)&15],[sp,#`$SZ*(($i-8)%4)`]
 123 ___
 124 # While ARMv8 specifies merged rotate-n-logical operation such as
 125 # 'eor x,y,z,ror#n', it was found to negatively affect performance
 126 # on Apple A7. The reason seems to be that it requires even 'y' to
 127 # be available earlier. This means that such merged instruction is
 128 # not necessarily best choice on critical path... On the other hand
 129 # Cortex-A5x handles merged instructions much better than disjoint
 130 # rotate and logical... See (**) footnote above.
 131 $code.=<<___    if ($i<15);
 132         ror     $t0,$e,#$Sigma1[0]
 133         add     $h,$h,$t2                       // h+=K[i]
 134         eor     $T0,$e,$e,ror#`$Sigma1[2]-$Sigma1[1]`
 135         and     $t1,$f,$e
 136         bic     $t2,$g,$e
 137         add     $h,$h,@X[$i&15]                 // h+=X[i]
 138         orr     $t1,$t1,$t2                     // Ch(e,f,g)
 139         eor     $t2,$a,$b                       // a^b, b^c in next round
 140         eor     $t0,$t0,$T0,ror#$Sigma1[1]      // Sigma1(e)
 141         ror     $T0,$a,#$Sigma0[0]
 142         add     $h,$h,$t1                       // h+=Ch(e,f,g)
 143         eor     $t1,$a,$a,ror#`$Sigma0[2]-$Sigma0[1]`
 144         add     $h,$h,$t0                       // h+=Sigma1(e)
 145         and     $t3,$t3,$t2                     // (b^c)&=(a^b)
 146         add     $d,$d,$h                        // d+=h
 147         eor     $t3,$t3,$b                      // Maj(a,b,c)
 148         eor     $t1,$T0,$t1,ror#$Sigma0[1]      // Sigma0(a)
 149         add     $h,$h,$t3                       // h+=Maj(a,b,c)
 150         ldr     $t3,[$Ktbl],#$SZ                // *K++, $t2 in next round
 151         //add   $h,$h,$t1                       // h+=Sigma0(a)
 152 ___
 153 $code.=<<___    if ($i>=15);
 154         ror     $t0,$e,#$Sigma1[0]
 155         add     $h,$h,$t2                       // h+=K[i]
 156         ror     $T1,@X[($j+1)&15],#$sigma0[0]
 157         and     $t1,$f,$e
 158         ror     $T2,@X[($j+14)&15],#$sigma1[0]
 159         bic     $t2,$g,$e
 160         ror     $T0,$a,#$Sigma0[0]
 161         add     $h,$h,@X[$i&15]                 // h+=X[i]
 162         eor     $t0,$t0,$e,ror#$Sigma1[1]
 163         eor     $T1,$T1,@X[($j+1)&15],ror#$sigma0[1]
 164         orr     $t1,$t1,$t2                     // Ch(e,f,g)
 165         eor     $t2,$a,$b                       // a^b, b^c in next round
 166         eor     $t0,$t0,$e,ror#$Sigma1[2]       // Sigma1(e)
 167         eor     $T0,$T0,$a,ror#$Sigma0[1]
 168         add     $h,$h,$t1                       // h+=Ch(e,f,g)
 169         and     $t3,$t3,$t2                     // (b^c)&=(a^b)
 170         eor     $T2,$T2,@X[($j+14)&15],ror#$sigma1[1]
 171         eor     $T1,$T1,@X[($j+1)&15],lsr#$sigma0[2]    // sigma0(X[i+1])
 172         add     $h,$h,$t0                       // h+=Sigma1(e)
 173         eor     $t3,$t3,$b                      // Maj(a,b,c)
 174         eor     $t1,$T0,$a,ror#$Sigma0[2]       // Sigma0(a)
 175         eor     $T2,$T2,@X[($j+14)&15],lsr#$sigma1[2]   // sigma1(X[i+14])
 176         add     @X[$j],@X[$j],@X[($j+9)&15]
 177         add     $d,$d,$h                        // d+=h
 178         add     $h,$h,$t3                       // h+=Maj(a,b,c)
 179         ldr     $t3,[$Ktbl],#$SZ                // *K++, $t2 in next round
 180         add     @X[$j],@X[$j],$T1
 181         add     $h,$h,$t1                       // h+=Sigma0(a)
 182         add     @X[$j],@X[$j],$T2
 183 ___
 184         ($t2,$t3)=($t3,$t2);
 185 }
 186
 187 $code.=<<___;
 188 #ifndef __KERNEL__
 189 # include "arm_arch.h"
 190 #endif
 191
 192 .text
 193
 194 .extern OPENSSL_armcap_P
 195 .globl  $func
 196 .type   $func,%function
 197 .align  6
 198 $func:
 199 ___
 200 $code.=<<___    if ($SZ==4);
 201 #ifndef __KERNEL__
 202 # ifdef __ILP32__
 203         ldrsw   x16,.LOPENSSL_armcap_P
 204 # else
 205         ldr     x16,.LOPENSSL_armcap_P
 206 # endif
 207         adr     x17,.LOPENSSL_armcap_P
 208         add     x16,x16,x17
 209         ldr     w16,[x16]
 210         tst     w16,#ARMV8_SHA256
 211         b.ne    .Lv8_entry
 212         tst     w16,#ARMV7_NEON
 213         b.ne    .Lneon_entry
 214 #endif
 215 ___
 216 $code.=<<___;
 217         stp     x29,x30,[sp,#-128]!
 218         add     x29,sp,#0
 219
 220         stp     x19,x20,[sp,#16]
 221         stp     x21,x22,[sp,#32]
 222         stp     x23,x24,[sp,#48]
 223         stp     x25,x26,[sp,#64]
 224         stp     x27,x28,[sp,#80]
 225         sub     sp,sp,#4*$SZ
 226
 227         ldp     $A,$B,[$ctx]                            // load context
 228         ldp     $C,$D,[$ctx,#2*$SZ]
 229         ldp     $E,$F,[$ctx,#4*$SZ]
 230         add     $num,$inp,$num,lsl#`log(16*$SZ)/log(2)` // end of input
 231         ldp     $G,$H,[$ctx,#6*$SZ]
 232         adr     $Ktbl,.LK$BITS
 233         stp     $ctx,$num,[x29,#96]
 234
 235 .Loop:
 236         ldp     @X[0],@X[1],[$inp],#2*$SZ
 237         ldr     $t2,[$Ktbl],#$SZ                        // *K++
 238         eor     $t3,$B,$C                               // magic seed
 239         str     $inp,[x29,#112]
 240 ___
 241 for ($i=0;$i<16;$i++)   { &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
 242 $code.=".Loop_16_xx:\n";
 243 for (;$i<32;$i++)       { &BODY_00_xx($i,@V); unshift(@V,pop(@V)); }
 244 $code.=<<___;
 245         cbnz    $t2,.Loop_16_xx
 246
 247         ldp     $ctx,$num,[x29,#96]
 248         ldr     $inp,[x29,#112]
 249         sub     $Ktbl,$Ktbl,#`$SZ*($rounds+1)`          // rewind
 250
 251         ldp     @X[0],@X[1],[$ctx]
 252         ldp     @X[2],@X[3],[$ctx,#2*$SZ]
 253         add     $inp,$inp,#14*$SZ                       // advance input pointer
 254         ldp     @X[4],@X[5],[$ctx,#4*$SZ]
 255         add     $A,$A,@X[0]
 256         ldp     @X[6],@X[7],[$ctx,#6*$SZ]
 257         add     $B,$B,@X[1]
 258         add     $C,$C,@X[2]
 259         add     $D,$D,@X[3]
 260         stp     $A,$B,[$ctx]
 261         add     $E,$E,@X[4]
 262         add     $F,$F,@X[5]
 263         stp     $C,$D,[$ctx,#2*$SZ]
 264         add     $G,$G,@X[6]
 265         add     $H,$H,@X[7]
 266         cmp     $inp,$num
 267         stp     $E,$F,[$ctx,#4*$SZ]
 268         stp     $G,$H,[$ctx,#6*$SZ]
 269         b.ne    .Loop
 270
 271         ldp     x19,x20,[x29,#16]
 272         add     sp,sp,#4*$SZ
 273         ldp     x21,x22,[x29,#32]
 274         ldp     x23,x24,[x29,#48]
 275         ldp     x25,x26,[x29,#64]
 276         ldp     x27,x28,[x29,#80]
 277         ldp     x29,x30,[sp],#128
 278         ret
 279 .size   $func,.-$func
 280
 281 .align  6
 282 .type   .LK$BITS,%object
 283 .LK$BITS:
 284 ___
 285 $code.=<<___ if ($SZ==8);
 286         .quad   0x428a2f98d728ae22,0x7137449123ef65cd
 287         .quad   0xb5c0fbcfec4d3b2f,0xe9b5dba58189dbbc
 288         .quad   0x3956c25bf348b538,0x59f111f1b605d019
 289         .quad   0x923f82a4af194f9b,0xab1c5ed5da6d8118
 290         .quad   0xd807aa98a3030242,0x12835b0145706fbe
 291         .quad   0x243185be4ee4b28c,0x550c7dc3d5ffb4e2
 292         .quad   0x72be5d74f27b896f,0x80deb1fe3b1696b1
 293         .quad   0x9bdc06a725c71235,0xc19bf174cf692694
 294         .quad   0xe49b69c19ef14ad2,0xefbe4786384f25e3
 295         .quad   0x0fc19dc68b8cd5b5,0x240ca1cc77ac9c65
 296         .quad   0x2de92c6f592b0275,0x4a7484aa6ea6e483
 297         .quad   0x5cb0a9dcbd41fbd4,0x76f988da831153b5
 298         .quad   0x983e5152ee66dfab,0xa831c66d2db43210
 299         .quad   0xb00327c898fb213f,0xbf597fc7beef0ee4
 300         .quad   0xc6e00bf33da88fc2,0xd5a79147930aa725
 301         .quad   0x06ca6351e003826f,0x142929670a0e6e70
 302         .quad   0x27b70a8546d22ffc,0x2e1b21385c26c926
 303         .quad   0x4d2c6dfc5ac42aed,0x53380d139d95b3df
 304         .quad   0x650a73548baf63de,0x766a0abb3c77b2a8
 305         .quad   0x81c2c92e47edaee6,0x92722c851482353b
 306         .quad   0xa2bfe8a14cf10364,0xa81a664bbc423001
 307         .quad   0xc24b8b70d0f89791,0xc76c51a30654be30
 308         .quad   0xd192e819d6ef5218,0xd69906245565a910
 309         .quad   0xf40e35855771202a,0x106aa07032bbd1b8
 310         .quad   0x19a4c116b8d2d0c8,0x1e376c085141ab53
 311         .quad   0x2748774cdf8eeb99,0x34b0bcb5e19b48a8
 312         .quad   0x391c0cb3c5c95a63,0x4ed8aa4ae3418acb
 313         .quad   0x5b9cca4f7763e373,0x682e6ff3d6b2b8a3
 314         .quad   0x748f82ee5defb2fc,0x78a5636f43172f60
 315         .quad   0x84c87814a1f0ab72,0x8cc702081a6439ec
 316         .quad   0x90befffa23631e28,0xa4506cebde82bde9
 317         .quad   0xbef9a3f7b2c67915,0xc67178f2e372532b
 318         .quad   0xca273eceea26619c,0xd186b8c721c0c207
 319         .quad   0xeada7dd6cde0eb1e,0xf57d4f7fee6ed178
 320         .quad   0x06f067aa72176fba,0x0a637dc5a2c898a6
 321         .quad   0x113f9804bef90dae,0x1b710b35131c471b
 322         .quad   0x28db77f523047d84,0x32caab7b40c72493
 323         .quad   0x3c9ebe0a15c9bebc,0x431d67c49c100d4c
 324         .quad   0x4cc5d4becb3e42b6,0x597f299cfc657e2a
 325         .quad   0x5fcb6fab3ad6faec,0x6c44198c4a475817
 326         .quad   0       // terminator
 327 ___
 328 $code.=<<___ if ($SZ==4);
 329         .long   0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
 330         .long   0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
 331         .long   0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
 332         .long   0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
 333         .long   0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
 334         .long   0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
 335         .long   0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
 336         .long   0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
 337         .long   0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
 338         .long   0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
 339         .long   0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
 340         .long   0xd192e819,0xd6990624,0xf40e3585,0x106aa070
 341         .long   0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
 342         .long   0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
 343         .long   0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
 344         .long   0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 345         .long   0       //terminator
 346 ___
 347 $code.=<<___;
 348 .size   .LK$BITS,.-.LK$BITS
 349 #ifndef __KERNEL__
 350 .align  3
 351 .LOPENSSL_armcap_P:
 352 # ifdef __ILP32__
 353         .long   OPENSSL_armcap_P-.
 354 # else
 355         .quad   OPENSSL_armcap_P-.
 356 # endif
 357 #endif
 358 .asciz  "SHA$BITS block transform for ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
 359 .align  2
 360 ___
 361
 362 if ($SZ==4) {
 363 my $Ktbl="x3";
 364
 365 my ($ABCD,$EFGH,$abcd)=map("v$_.16b",(0..2));
 366 my @MSG=map("v$_.16b",(4..7));
 367 my ($W0,$W1)=("v16.4s","v17.4s");
 368 my ($ABCD_SAVE,$EFGH_SAVE)=("v18.16b","v19.16b");
 369
 370 $code.=<<___;
 371 #ifndef __KERNEL__
 372 .type   sha256_block_armv8,%function
 373 .align  6
 374 sha256_block_armv8:
 375 .Lv8_entry:
 376         stp             x29,x30,[sp,#-16]!
 377         add             x29,sp,#0
 378
 379         ld1.32          {$ABCD,$EFGH},[$ctx]
 380         adr             $Ktbl,.LK256
 381
 382 .Loop_hw:
 383         ld1             {@MSG[0]-@MSG[3]},[$inp],#64
 384         sub             $num,$num,#1
 385         ld1.32          {$W0},[$Ktbl],#16
 386         rev32           @MSG[0],@MSG[0]
 387         rev32           @MSG[1],@MSG[1]
 388         rev32           @MSG[2],@MSG[2]
 389         rev32           @MSG[3],@MSG[3]
 390         orr             $ABCD_SAVE,$ABCD,$ABCD          // offload
 391         orr             $EFGH_SAVE,$EFGH,$EFGH
 392 ___
 393 for($i=0;$i<12;$i++) {
 394 $code.=<<___;
 395         ld1.32          {$W1},[$Ktbl],#16
 396         add.i32         $W0,$W0,@MSG[0]
 397         sha256su0       @MSG[0],@MSG[1]
 398         orr             $abcd,$ABCD,$ABCD
 399         sha256h         $ABCD,$EFGH,$W0
 400         sha256h2        $EFGH,$abcd,$W0
 401         sha256su1       @MSG[0],@MSG[2],@MSG[3]
 402 ___
 403         ($W0,$W1)=($W1,$W0);    push(@MSG,shift(@MSG));
 404 }
 405 $code.=<<___;
 406         ld1.32          {$W1},[$Ktbl],#16
 407         add.i32         $W0,$W0,@MSG[0]
 408         orr             $abcd,$ABCD,$ABCD
 409         sha256h         $ABCD,$EFGH,$W0
 410         sha256h2        $EFGH,$abcd,$W0
 411
 412         ld1.32          {$W0},[$Ktbl],#16
 413         add.i32         $W1,$W1,@MSG[1]
 414         orr             $abcd,$ABCD,$ABCD
 415         sha256h         $ABCD,$EFGH,$W1
 416         sha256h2        $EFGH,$abcd,$W1
 417
 418         ld1.32          {$W1},[$Ktbl]
 419         add.i32         $W0,$W0,@MSG[2]
 420         sub             $Ktbl,$Ktbl,#$rounds*$SZ-16     // rewind
 421         orr             $abcd,$ABCD,$ABCD
 422         sha256h         $ABCD,$EFGH,$W0
 423         sha256h2        $EFGH,$abcd,$W0
 424
 425         add.i32         $W1,$W1,@MSG[3]
 426         orr             $abcd,$ABCD,$ABCD
 427         sha256h         $ABCD,$EFGH,$W1
 428         sha256h2        $EFGH,$abcd,$W1
 429
 430         add.i32         $ABCD,$ABCD,$ABCD_SAVE
 431         add.i32         $EFGH,$EFGH,$EFGH_SAVE
 432
 433         cbnz            $num,.Loop_hw
 434
 435         st1.32          {$ABCD,$EFGH},[$ctx]
 436
 437         ldr             x29,[sp],#16
 438         ret
 439 .size   sha256_block_armv8,.-sha256_block_armv8
 440 #endif
 441 ___
 442 }
 443
 444 if ($SZ==4) {   ######################################### NEON stuff #
 445 # You'll surely note a lot of similarities with sha256-armv4 module,
 446 # and of course it's not a coincidence. sha256-armv4 was used as
 447 # initial template, but was adapted for ARMv8 instruction set and
 448 # extensively re-tuned for all-round performance.
 449
 450 my @V = ($A,$B,$C,$D,$E,$F,$G,$H) = map("w$_",(3..10));
 451 my ($t0,$t1,$t2,$t3,$t4) = map("w$_",(11..15));
 452 my $Ktbl="x16";
 453 my $Xfer="x17";
 454 my @X = map("q$_",(0..3));
 455 my ($T0,$T1,$T2,$T3,$T4,$T5,$T6,$T7) = map("q$_",(4..7,16..19));
 456 my $j=0;
 457
 458 sub AUTOLOAD()          # thunk [simplified] x86-style perlasm
 459 { my $opcode = $AUTOLOAD; $opcode =~ s/.*:://; $opcode =~ s/_/\./;
 460   my $arg = pop;
 461     $arg = "#$arg" if ($arg*1 eq $arg);
 462     $code .= "\t$opcode\t".join(',',@_,$arg)."\n";
 463 }
 464
 465 sub Dscalar { shift =~ m|[qv]([0-9]+)|?"d$1":""; }
 466 sub Dlo     { shift =~ m|[qv]([0-9]+)|?"v$1.d[0]":""; }
 467 sub Dhi     { shift =~ m|[qv]([0-9]+)|?"v$1.d[1]":""; }
 468
 469 sub Xupdate()
 470 { use integer;
 471   my $body = shift;
 472   my @insns = (&$body,&$body,&$body,&$body);
 473   my ($a,$b,$c,$d,$e,$f,$g,$h);
 474
 475         &ext_8          ($T0,@X[0],@X[1],4);    # X[1..4]
 476          eval(shift(@insns));
 477          eval(shift(@insns));
 478          eval(shift(@insns));
 479         &ext_8          ($T3,@X[2],@X[3],4);    # X[9..12]
 480          eval(shift(@insns));
 481          eval(shift(@insns));
 482         &mov            (&Dscalar($T7),&Dhi(@X[3]));    # X[14..15]
 483          eval(shift(@insns));
 484          eval(shift(@insns));
 485         &ushr_32        ($T2,$T0,$sigma0[0]);
 486          eval(shift(@insns));
 487         &ushr_32        ($T1,$T0,$sigma0[2]);
 488          eval(shift(@insns));
 489         &add_32         (@X[0],@X[0],$T3);      # X[0..3] += X[9..12]
 490          eval(shift(@insns));
 491         &sli_32         ($T2,$T0,32-$sigma0[0]);
 492          eval(shift(@insns));
 493          eval(shift(@insns));
 494         &ushr_32        ($T3,$T0,$sigma0[1]);
 495          eval(shift(@insns));
 496          eval(shift(@insns));
 497         &eor_8          ($T1,$T1,$T2);
 498          eval(shift(@insns));
 499          eval(shift(@insns));
 500         &sli_32         ($T3,$T0,32-$sigma0[1]);
 501          eval(shift(@insns));
 502          eval(shift(@insns));
 503           &ushr_32      ($T4,$T7,$sigma1[0]);
 504          eval(shift(@insns));
 505          eval(shift(@insns));
 506         &eor_8          ($T1,$T1,$T3);          # sigma0(X[1..4])
 507          eval(shift(@insns));
 508          eval(shift(@insns));
 509           &sli_32       ($T4,$T7,32-$sigma1[0]);
 510          eval(shift(@insns));
 511          eval(shift(@insns));
 512           &ushr_32      ($T5,$T7,$sigma1[2]);
 513          eval(shift(@insns));
 514          eval(shift(@insns));
 515           &ushr_32      ($T3,$T7,$sigma1[1]);
 516          eval(shift(@insns));
 517          eval(shift(@insns));
 518         &add_32         (@X[0],@X[0],$T1);      # X[0..3] += sigma0(X[1..4])
 519          eval(shift(@insns));
 520          eval(shift(@insns));
 521           &sli_u32      ($T3,$T7,32-$sigma1[1]);
 522          eval(shift(@insns));
 523          eval(shift(@insns));
 524           &eor_8        ($T5,$T5,$T4);
 525          eval(shift(@insns));
 526          eval(shift(@insns));
 527          eval(shift(@insns));
 528           &eor_8        ($T5,$T5,$T3);          # sigma1(X[14..15])
 529          eval(shift(@insns));
 530          eval(shift(@insns));
 531          eval(shift(@insns));
 532         &add_32         (@X[0],@X[0],$T5);      # X[0..1] += sigma1(X[14..15])
 533          eval(shift(@insns));
 534          eval(shift(@insns));
 535          eval(shift(@insns));
 536           &ushr_32      ($T6,@X[0],$sigma1[0]);
 537          eval(shift(@insns));
 538           &ushr_32      ($T7,@X[0],$sigma1[2]);
 539          eval(shift(@insns));
 540          eval(shift(@insns));
 541           &sli_32       ($T6,@X[0],32-$sigma1[0]);
 542          eval(shift(@insns));
 543           &ushr_32      ($T5,@X[0],$sigma1[1]);
 544          eval(shift(@insns));
 545          eval(shift(@insns));
 546           &eor_8        ($T7,$T7,$T6);
 547          eval(shift(@insns));
 548          eval(shift(@insns));
 549           &sli_32       ($T5,@X[0],32-$sigma1[1]);
 550          eval(shift(@insns));
 551          eval(shift(@insns));
 552         &ld1_32         ("{$T0}","[$Ktbl], #16");
 553          eval(shift(@insns));
 554           &eor_8        ($T7,$T7,$T5);          # sigma1(X[16..17])
 555          eval(shift(@insns));
 556          eval(shift(@insns));
 557         &eor_8          ($T5,$T5,$T5);
 558          eval(shift(@insns));
 559          eval(shift(@insns));
 560         &mov            (&Dhi($T5), &Dlo($T7));
 561          eval(shift(@insns));
 562          eval(shift(@insns));
 563          eval(shift(@insns));
 564         &add_32         (@X[0],@X[0],$T5);      # X[2..3] += sigma1(X[16..17])
 565          eval(shift(@insns));
 566          eval(shift(@insns));
 567          eval(shift(@insns));
 568         &add_32         ($T0,$T0,@X[0]);
 569          while($#insns>=1) { eval(shift(@insns)); }
 570         &st1_32         ("{$T0}","[$Xfer], #16");
 571          eval(shift(@insns));
 572
 573         push(@X,shift(@X));             # "rotate" X[]
 574 }
 575
 576 sub Xpreload()
 577 { use integer;
 578   my $body = shift;
 579   my @insns = (&$body,&$body,&$body,&$body);
 580   my ($a,$b,$c,$d,$e,$f,$g,$h);
 581
 582          eval(shift(@insns));
 583          eval(shift(@insns));
 584         &ld1_8          ("{@X[0]}","[$inp],#16");
 585          eval(shift(@insns));
 586          eval(shift(@insns));
 587         &ld1_32         ("{$T0}","[$Ktbl],#16");
 588          eval(shift(@insns));
 589          eval(shift(@insns));
 590          eval(shift(@insns));
 591          eval(shift(@insns));
 592         &rev32          (@X[0],@X[0]);
 593          eval(shift(@insns));
 594          eval(shift(@insns));
 595          eval(shift(@insns));
 596          eval(shift(@insns));
 597         &add_32         ($T0,$T0,@X[0]);
 598          foreach (@insns) { eval; }     # remaining instructions
 599         &st1_32         ("{$T0}","[$Xfer], #16");
 600
 601         push(@X,shift(@X));             # "rotate" X[]
 602 }
 603
 604 sub body_00_15 () {
 605         (
 606         '($a,$b,$c,$d,$e,$f,$g,$h)=@V;'.
 607         '&add   ($h,$h,$t1)',                   # h+=X[i]+K[i]
 608         '&add   ($a,$a,$t4);'.                  # h+=Sigma0(a) from the past
 609         '&and   ($t1,$f,$e)',
 610         '&bic   ($t4,$g,$e)',
 611         '&eor   ($t0,$e,$e,"ror#".($Sigma1[1]-$Sigma1[0]))',
 612         '&add   ($a,$a,$t2)',                   # h+=Maj(a,b,c) from the past
 613         '&orr   ($t1,$t1,$t4)',                 # Ch(e,f,g)
 614         '&eor   ($t0,$t0,$e,"ror#".($Sigma1[2]-$Sigma1[0]))',   # Sigma1(e)
 615         '&eor   ($t4,$a,$a,"ror#".($Sigma0[1]-$Sigma0[0]))',
 616         '&add   ($h,$h,$t1)',                   # h+=Ch(e,f,g)
 617         '&ror   ($t0,$t0,"#$Sigma1[0]")',
 618         '&eor   ($t2,$a,$b)',                   # a^b, b^c in next round
 619         '&eor   ($t4,$t4,$a,"ror#".($Sigma0[2]-$Sigma0[0]))',   # Sigma0(a)
 620         '&add   ($h,$h,$t0)',                   # h+=Sigma1(e)
 621         '&ldr   ($t1,sprintf "[sp,#%d]",4*(($j+1)&15))  if (($j&15)!=15);'.
 622         '&ldr   ($t1,"[$Ktbl]")                         if ($j==15);'.
 623         '&and   ($t3,$t3,$t2)',                 # (b^c)&=(a^b)
 624         '&ror   ($t4,$t4,"#$Sigma0[0]")',
 625         '&add   ($d,$d,$h)',                    # d+=h
 626         '&eor   ($t3,$t3,$b)',                  # Maj(a,b,c)
 627         '$j++;  unshift(@V,pop(@V)); ($t2,$t3)=($t3,$t2);'
 628         )
 629 }
 630
 631 $code.=<<___;
 632 #ifdef  __KERNEL__
 633 .globl  sha256_block_neon
 634 #endif
 635 .type   sha256_block_neon,%function
 636 .align  4
 637 sha256_block_neon:
 638 .Lneon_entry:
 639         stp     x29, x30, [sp, #-16]!
 640         mov     x29, sp
 641         sub     sp,sp,#16*4
 642
 643         adr     $Ktbl,.LK256
 644         add     $num,$inp,$num,lsl#6    // len to point at the end of inp
 645
 646         ld1.8   {@X[0]},[$inp], #16
 647         ld1.8   {@X[1]},[$inp], #16
 648         ld1.8   {@X[2]},[$inp], #16
 649         ld1.8   {@X[3]},[$inp], #16
 650         ld1.32  {$T0},[$Ktbl], #16
 651         ld1.32  {$T1},[$Ktbl], #16
 652         ld1.32  {$T2},[$Ktbl], #16
 653         ld1.32  {$T3},[$Ktbl], #16
 654         rev32   @X[0],@X[0]             // yes, even on
 655         rev32   @X[1],@X[1]             // big-endian
 656         rev32   @X[2],@X[2]
 657         rev32   @X[3],@X[3]
 658         mov     $Xfer,sp
 659         add.32  $T0,$T0,@X[0]
 660         add.32  $T1,$T1,@X[1]
 661         add.32  $T2,$T2,@X[2]
 662         st1.32  {$T0-$T1},[$Xfer], #32
 663         add.32  $T3,$T3,@X[3]
 664         st1.32  {$T2-$T3},[$Xfer]
 665         sub     $Xfer,$Xfer,#32
 666
 667         ldp     $A,$B,[$ctx]
 668         ldp     $C,$D,[$ctx,#8]
 669         ldp     $E,$F,[$ctx,#16]
 670         ldp     $G,$H,[$ctx,#24]
 671         ldr     $t1,[sp,#0]
 672         mov     $t2,wzr
 673         eor     $t3,$B,$C
 674         mov     $t4,wzr
 675         b       .L_00_48
 676
 677 .align  4
 678 .L_00_48:
 679 ___
 680         &Xupdate(\&body_00_15);
 681         &Xupdate(\&body_00_15);
 682         &Xupdate(\&body_00_15);
 683         &Xupdate(\&body_00_15);
 684 $code.=<<___;
 685         cmp     $t1,#0                          // check for K256 terminator
 686         ldr     $t1,[sp,#0]
 687         sub     $Xfer,$Xfer,#64
 688         bne     .L_00_48
 689
 690         sub     $Ktbl,$Ktbl,#256                // rewind $Ktbl
 691         cmp     $inp,$num
 692         mov     $Xfer, #64
 693         csel    $Xfer, $Xfer, xzr, eq
 694         sub     $inp,$inp,$Xfer                 // avoid SEGV
 695         mov     $Xfer,sp
 696 ___
 697         &Xpreload(\&body_00_15);
 698         &Xpreload(\&body_00_15);
 699         &Xpreload(\&body_00_15);
 700         &Xpreload(\&body_00_15);
 701 $code.=<<___;
 702         add     $A,$A,$t4                       // h+=Sigma0(a) from the past
 703         ldp     $t0,$t1,[$ctx,#0]
 704         add     $A,$A,$t2                       // h+=Maj(a,b,c) from the past
 705         ldp     $t2,$t3,[$ctx,#8]
 706         add     $A,$A,$t0                       // accumulate
 707         add     $B,$B,$t1
 708         ldp     $t0,$t1,[$ctx,#16]
 709         add     $C,$C,$t2
 710         add     $D,$D,$t3
 711         ldp     $t2,$t3,[$ctx,#24]
 712         add     $E,$E,$t0
 713         add     $F,$F,$t1
 714          ldr    $t1,[sp,#0]
 715         stp     $A,$B,[$ctx,#0]
 716         add     $G,$G,$t2
 717          mov    $t2,wzr
 718         stp     $C,$D,[$ctx,#8]
 719         add     $H,$H,$t3
 720         stp     $E,$F,[$ctx,#16]
 721          eor    $t3,$B,$C
 722         stp     $G,$H,[$ctx,#24]
 723          mov    $t4,wzr
 724          mov    $Xfer,sp
 725         b.ne    .L_00_48
 726
 727         ldr     x29,[x29]
 728         add     sp,sp,#16*4+16
 729         ret
 730 .size   sha256_block_neon,.-sha256_block_neon
 731 ___
 732 }
 733
 734 $code.=<<___;
 735 #ifndef __KERNEL__
 736 .comm   OPENSSL_armcap_P,4,4
 737 #endif
 738 ___
 739
 740 {   my  %opcode = (
 741         "sha256h"       => 0x5e004000,  "sha256h2"      => 0x5e005000,
 742         "sha256su0"     => 0x5e282800,  "sha256su1"     => 0x5e006000   );
 743
 744     sub unsha256 {
 745         my ($mnemonic,$arg)=@_;
 746
 747         $arg =~ m/[qv]([0-9]+)[^,]*,\s*[qv]([0-9]+)[^,]*(?:,\s*[qv]([0-9]+))?/o
 748         &&
 749         sprintf ".inst\t0x%08x\t//%s %s",
 750                         $opcode{$mnemonic}|$1|($2<<5)|($3<<16),
 751                         $mnemonic,$arg;
 752     }
 753 }
 754
 755 open SELF,$0;
 756 while(<SELF>) {
 757         next if (/^#!/);
 758         last if (!s/^#/\/\// and !/^$/);
 759         print;
 760 }
 761 close SELF;
 762
 763 foreach(split("\n",$code)) {
 764
 765         s/\`([^\`]*)\`/eval($1)/ge;
 766
 767         s/\b(sha256\w+)\s+([qv].*)/unsha256($1,$2)/ge;
 768
 769         s/\bq([0-9]+)\b/v$1.16b/g;              # old->new registers
 770
 771         s/\.[ui]?8(\s)/$1/;
 772         s/\.\w?32\b//           and s/\.16b/\.4s/g;
 773         m/(ld|st)1[^\[]+\[0\]/  and s/\.4s/\.s/g;
 774
 775         print $_,"\n";
 776 }
 777
 778 close STDOUT;