crypto/sha/asm/sha512-ppc.pl

   1 #!/usr/bin/env perl
   2
   3 # ====================================================================
   4 # Written by Andy Polyakov <appro@fy.chalmers.se> 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 # I let hardware handle unaligned input, except on page boundaries
  11 # (see below for details). Otherwise straightforward implementation
  12 # with X vector in register bank. The module is big-endian [which is
  13 # not big deal as there're no little-endian targets left around].
  14
  15 #                       sha256          |       sha512
  16 #                       -m64    -m32    |       -m64    -m32
  17 # --------------------------------------+-----------------------
  18 # PPC970,gcc-4.0.0      +50%    +38%    |       +40%    +410%(*)
  19 # Power6,xlc-7          +150%   +90%    |       +100%   +430%(*)
  20 #
  21 # (*)   64-bit code in 32-bit application context, which actually is
  22 #       on TODO list. It should be noted that for safe deployment in
  23 #       32-bit *mutli-threaded* context asyncronous signals should be
  24 #       blocked upon entry to SHA512 block routine. This is because
  25 #       32-bit signaling procedure invalidates upper halves of GPRs.
  26 #       Context switch procedure preserves them, but not signaling:-(
  27
  28 # Second version is true multi-thread safe. Trouble with the original
  29 # version was that it was using thread local storage pointer register.
  30 # Well, it scrupulously preserved it, but the problem would arise the
  31 # moment asynchronous signal was delivered and signal handler would
  32 # dereference the TLS pointer. While it's never the case in openssl
  33 # application or test suite, we have to respect this scenario and not
  34 # use TLS pointer register. Alternative would be to require caller to
  35 # block signals prior calling this routine. For the record, in 32-bit
  36 # context R2 serves as TLS pointer, while in 64-bit context - R13.
  37
  38 $flavour=shift;
  39 $output =shift;
  40
  41 if ($flavour =~ /64/) {
  42         $SIZE_T=8;
  43         $STU="stdu";
  44         $UCMP="cmpld";
  45         $SHL="sldi";
  46         $POP="ld";
  47         $PUSH="std";
  48 } elsif ($flavour =~ /32/) {
  49         $SIZE_T=4;
  50         $STU="stwu";
  51         $UCMP="cmplw";
  52         $SHL="slwi";
  53         $POP="lwz";
  54         $PUSH="stw";
  55 } else { die "nonsense $flavour"; }
  56
  57 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
  58 ( $xlate="${dir}ppc-xlate.pl" and -f $xlate ) or
  59 ( $xlate="${dir}../../perlasm/ppc-xlate.pl" and -f $xlate) or
  60 die "can't locate ppc-xlate.pl";
  61
  62 open STDOUT,"| $^X $xlate $flavour $output" || die "can't call $xlate: $!";
  63
  64 if ($output =~ /512/) {
  65         $func="sha512_block_data_order";
  66         $SZ=8;
  67         @Sigma0=(28,34,39);
  68         @Sigma1=(14,18,41);
  69         @sigma0=(1,  8, 7);
  70         @sigma1=(19,61, 6);
  71         $rounds=80;
  72         $LD="ld";
  73         $ST="std";
  74         $ROR="rotrdi";
  75         $SHR="srdi";
  76 } else {
  77         $func="sha256_block_data_order";
  78         $SZ=4;
  79         @Sigma0=( 2,13,22);
  80         @Sigma1=( 6,11,25);
  81         @sigma0=( 7,18, 3);
  82         @sigma1=(17,19,10);
  83         $rounds=64;
  84         $LD="lwz";
  85         $ST="stw";
  86         $ROR="rotrwi";
  87         $SHR="srwi";
  88 }
  89
  90 $FRAME=32*$SIZE_T;
  91
  92 $sp ="r1";
  93 $toc="r2";
  94 $ctx="r3";      # zapped by $a0
  95 $inp="r4";      # zapped by $a1
  96 $num="r5";      # zapped by $t0
  97
  98 $T  ="r0";
  99 $a0 ="r3";
 100 $a1 ="r4";
 101 $t0 ="r5";
 102 $t1 ="r6";
 103 $Tbl="r7";
 104
 105 $A  ="r8";
 106 $B  ="r9";
 107 $C  ="r10";
 108 $D  ="r11";
 109 $E  ="r12";
 110 $F  ="r13";     $F="r2" if ($SIZE_T==8);# reassigned to exempt TLS pointer
 111 $G  ="r14";
 112 $H  ="r15";
 113
 114 @V=($A,$B,$C,$D,$E,$F,$G,$H);
 115 @X=("r16","r17","r18","r19","r20","r21","r22","r23",
 116     "r24","r25","r26","r27","r28","r29","r30","r31");
 117
 118 $inp="r31";     # reassigned $inp! aliases with @X[15]
 119
 120 sub ROUND_00_15 {
 121 my ($i,$a,$b,$c,$d,$e,$f,$g,$h)=@_;
 122 $code.=<<___;
 123         $LD     $T,`$i*$SZ`($Tbl)
 124         $ROR    $a0,$e,$Sigma1[0]
 125         $ROR    $a1,$e,$Sigma1[1]
 126         and     $t0,$f,$e
 127         andc    $t1,$g,$e
 128         add     $T,$T,$h
 129         xor     $a0,$a0,$a1
 130         $ROR    $a1,$a1,`$Sigma1[2]-$Sigma1[1]`
 131         or      $t0,$t0,$t1             ; Ch(e,f,g)
 132         add     $T,$T,@X[$i]
 133         xor     $a0,$a0,$a1             ; Sigma1(e)
 134         add     $T,$T,$t0
 135         add     $T,$T,$a0
 136
 137         $ROR    $a0,$a,$Sigma0[0]
 138         $ROR    $a1,$a,$Sigma0[1]
 139         and     $t0,$a,$b
 140         and     $t1,$a,$c
 141         xor     $a0,$a0,$a1
 142         $ROR    $a1,$a1,`$Sigma0[2]-$Sigma0[1]`
 143         xor     $t0,$t0,$t1
 144         and     $t1,$b,$c
 145         xor     $a0,$a0,$a1             ; Sigma0(a)
 146         add     $d,$d,$T
 147         xor     $t0,$t0,$t1             ; Maj(a,b,c)
 148         add     $h,$T,$a0
 149         add     $h,$h,$t0
 150
 151 ___
 152 }
 153
 154 sub ROUND_16_xx {
 155 my ($i,$a,$b,$c,$d,$e,$f,$g,$h)=@_;
 156 $i-=16;
 157 $code.=<<___;
 158         $ROR    $a0,@X[($i+1)%16],$sigma0[0]
 159         $ROR    $a1,@X[($i+1)%16],$sigma0[1]
 160         $ROR    $t0,@X[($i+14)%16],$sigma1[0]
 161         $ROR    $t1,@X[($i+14)%16],$sigma1[1]
 162         xor     $a0,$a0,$a1
 163         $SHR    $a1,@X[($i+1)%16],$sigma0[2]
 164         xor     $t0,$t0,$t1
 165         $SHR    $t1,@X[($i+14)%16],$sigma1[2]
 166         add     @X[$i],@X[$i],@X[($i+9)%16]
 167         xor     $a0,$a0,$a1             ; sigma0(X[(i+1)&0x0f])
 168         xor     $t0,$t0,$t1             ; sigma1(X[(i+14)&0x0f])
 169         add     @X[$i],@X[$i],$a0
 170         add     @X[$i],@X[$i],$t0
 171 ___
 172 &ROUND_00_15($i,$a,$b,$c,$d,$e,$f,$g,$h);
 173 }
 174
 175 $code=<<___;
 176 .text
 177
 178 .globl  $func
 179 .align  6
 180 $func:
 181         mflr    r0
 182         $STU    $sp,`-($FRAME+16*$SZ)`($sp)
 183         $SHL    $num,$num,`log(16*$SZ)/log(2)`
 184
 185         $PUSH   $ctx,`$FRAME-$SIZE_T*22`($sp)
 186
 187         $PUSH   r0,`$FRAME-$SIZE_T*21`($sp)
 188         $PUSH   $toc,`$FRAME-$SIZE_T*20`($sp)
 189         $PUSH   r13,`$FRAME-$SIZE_T*19`($sp)
 190         $PUSH   r14,`$FRAME-$SIZE_T*18`($sp)
 191         $PUSH   r15,`$FRAME-$SIZE_T*17`($sp)
 192         $PUSH   r16,`$FRAME-$SIZE_T*16`($sp)
 193         $PUSH   r17,`$FRAME-$SIZE_T*15`($sp)
 194         $PUSH   r18,`$FRAME-$SIZE_T*14`($sp)
 195         $PUSH   r19,`$FRAME-$SIZE_T*13`($sp)
 196         $PUSH   r20,`$FRAME-$SIZE_T*12`($sp)
 197         $PUSH   r21,`$FRAME-$SIZE_T*11`($sp)
 198         $PUSH   r22,`$FRAME-$SIZE_T*10`($sp)
 199         $PUSH   r23,`$FRAME-$SIZE_T*9`($sp)
 200         $PUSH   r24,`$FRAME-$SIZE_T*8`($sp)
 201         $PUSH   r25,`$FRAME-$SIZE_T*7`($sp)
 202         $PUSH   r26,`$FRAME-$SIZE_T*6`($sp)
 203         $PUSH   r27,`$FRAME-$SIZE_T*5`($sp)
 204         $PUSH   r28,`$FRAME-$SIZE_T*4`($sp)
 205         $PUSH   r29,`$FRAME-$SIZE_T*3`($sp)
 206         $PUSH   r30,`$FRAME-$SIZE_T*2`($sp)
 207         $PUSH   r31,`$FRAME-$SIZE_T*1`($sp)
 208
 209         $LD     $A,`0*$SZ`($ctx)
 210         mr      $inp,r4                         ; incarnate $inp
 211         $LD     $B,`1*$SZ`($ctx)
 212         $LD     $C,`2*$SZ`($ctx)
 213         $LD     $D,`3*$SZ`($ctx)
 214         $LD     $E,`4*$SZ`($ctx)
 215         $LD     $F,`5*$SZ`($ctx)
 216         $LD     $G,`6*$SZ`($ctx)
 217         $LD     $H,`7*$SZ`($ctx)
 218
 219         b       LPICmeup
 220 LPICedup:
 221         andi.   r0,$inp,3
 222         bne     Lunaligned
 223 Laligned:
 224         add     $num,$inp,$num
 225         $PUSH   $num,`$FRAME-$SIZE_T*24`($sp)   ; end pointer
 226         $PUSH   $inp,`$FRAME-$SIZE_T*23`($sp)   ; inp pointer
 227         bl      Lsha2_block_private
 228 Ldone:
 229         $POP    r0,`$FRAME-$SIZE_T*21`($sp)
 230         $POP    $toc,`$FRAME-$SIZE_T*20`($sp)
 231         $POP    r13,`$FRAME-$SIZE_T*19`($sp)
 232         $POP    r14,`$FRAME-$SIZE_T*18`($sp)
 233         $POP    r15,`$FRAME-$SIZE_T*17`($sp)
 234         $POP    r16,`$FRAME-$SIZE_T*16`($sp)
 235         $POP    r17,`$FRAME-$SIZE_T*15`($sp)
 236         $POP    r18,`$FRAME-$SIZE_T*14`($sp)
 237         $POP    r19,`$FRAME-$SIZE_T*13`($sp)
 238         $POP    r20,`$FRAME-$SIZE_T*12`($sp)
 239         $POP    r21,`$FRAME-$SIZE_T*11`($sp)
 240         $POP    r22,`$FRAME-$SIZE_T*10`($sp)
 241         $POP    r23,`$FRAME-$SIZE_T*9`($sp)
 242         $POP    r24,`$FRAME-$SIZE_T*8`($sp)
 243         $POP    r25,`$FRAME-$SIZE_T*7`($sp)
 244         $POP    r26,`$FRAME-$SIZE_T*6`($sp)
 245         $POP    r27,`$FRAME-$SIZE_T*5`($sp)
 246         $POP    r28,`$FRAME-$SIZE_T*4`($sp)
 247         $POP    r29,`$FRAME-$SIZE_T*3`($sp)
 248         $POP    r30,`$FRAME-$SIZE_T*2`($sp)
 249         $POP    r31,`$FRAME-$SIZE_T*1`($sp)
 250         mtlr    r0
 251         addi    $sp,$sp,`$FRAME+16*$SZ`
 252         blr
 253 ___
 254
 255 # PowerPC specification allows an implementation to be ill-behaved
 256 # upon unaligned access which crosses page boundary. "Better safe
 257 # than sorry" principle makes me treat it specially. But I don't
 258 # look for particular offending word, but rather for the input
 259 # block which crosses the boundary. Once found that block is aligned
 260 # and hashed separately...
 261 $code.=<<___;
 262 .align  4
 263 Lunaligned:
 264         subfic  $t1,$inp,4096
 265         andi.   $t1,$t1,`4096-16*$SZ`   ; distance to closest page boundary
 266         beq     Lcross_page
 267         $UCMP   $num,$t1
 268         ble-    Laligned                ; didn't cross the page boundary
 269         subfc   $num,$t1,$num
 270         add     $t1,$inp,$t1
 271         $PUSH   $num,`$FRAME-$SIZE_T*25`($sp)   ; save real remaining num
 272         $PUSH   $t1,`$FRAME-$SIZE_T*24`($sp)    ; intermediate end pointer
 273         $PUSH   $inp,`$FRAME-$SIZE_T*23`($sp)   ; inp pointer
 274         bl      Lsha2_block_private
 275         ; $inp equals to the intermediate end pointer here
 276         $POP    $num,`$FRAME-$SIZE_T*25`($sp)   ; restore real remaining num
 277 Lcross_page:
 278         li      $t1,`16*$SZ/4`
 279         mtctr   $t1
 280         addi    r20,$sp,$FRAME                  ; aligned spot below the frame
 281 Lmemcpy:
 282         lbz     r16,0($inp)
 283         lbz     r17,1($inp)
 284         lbz     r18,2($inp)
 285         lbz     r19,3($inp)
 286         addi    $inp,$inp,4
 287         stb     r16,0(r20)
 288         stb     r17,1(r20)
 289         stb     r18,2(r20)
 290         stb     r19,3(r20)
 291         addi    r20,r20,4
 292         bdnz    Lmemcpy
 293
 294         $PUSH   $inp,`$FRAME-$SIZE_T*26`($sp)   ; save real inp
 295         addi    $t1,$sp,`$FRAME+16*$SZ`         ; fictitious end pointer
 296         addi    $inp,$sp,$FRAME                 ; fictitious inp pointer
 297         $PUSH   $num,`$FRAME-$SIZE_T*25`($sp)   ; save real num
 298         $PUSH   $t1,`$FRAME-$SIZE_T*24`($sp)    ; end pointer
 299         $PUSH   $inp,`$FRAME-$SIZE_T*23`($sp)   ; inp pointer
 300         bl      Lsha2_block_private
 301         $POP    $inp,`$FRAME-$SIZE_T*26`($sp)   ; restore real inp
 302         $POP    $num,`$FRAME-$SIZE_T*25`($sp)   ; restore real num
 303         addic.  $num,$num,`-16*$SZ`             ; num--
 304         bne-    Lunaligned
 305         b       Ldone
 306 ___
 307
 308 $code.=<<___;
 309 .align  4
 310 Lsha2_block_private:
 311 ___
 312 for($i=0;$i<16;$i++) {
 313 $code.=<<___ if ($SZ==4);
 314         lwz     @X[$i],`$i*$SZ`($inp)
 315 ___
 316 # 64-bit loads are split to 2x32-bit ones, as CPU can't handle
 317 # unaligned 64-bit loads, only 32-bit ones...
 318 $code.=<<___ if ($SZ==8);
 319         lwz     $t0,`$i*$SZ`($inp)
 320         lwz     @X[$i],`$i*$SZ+4`($inp)
 321         insrdi  @X[$i],$t0,32,0
 322 ___
 323         &ROUND_00_15($i,@V);
 324         unshift(@V,pop(@V));
 325 }
 326 $code.=<<___;
 327         li      $T,`$rounds/16-1`
 328         mtctr   $T
 329 .align  4
 330 Lrounds:
 331         addi    $Tbl,$Tbl,`16*$SZ`
 332 ___
 333 for(;$i<32;$i++) {
 334         &ROUND_16_xx($i,@V);
 335         unshift(@V,pop(@V));
 336 }
 337 $code.=<<___;
 338         bdnz-   Lrounds
 339
 340         $POP    $ctx,`$FRAME-$SIZE_T*22`($sp)
 341         $POP    $inp,`$FRAME-$SIZE_T*23`($sp)   ; inp pointer
 342         $POP    $num,`$FRAME-$SIZE_T*24`($sp)   ; end pointer
 343         subi    $Tbl,$Tbl,`($rounds-16)*$SZ`    ; rewind Tbl
 344
 345         $LD     r16,`0*$SZ`($ctx)
 346         $LD     r17,`1*$SZ`($ctx)
 347         $LD     r18,`2*$SZ`($ctx)
 348         $LD     r19,`3*$SZ`($ctx)
 349         $LD     r20,`4*$SZ`($ctx)
 350         $LD     r21,`5*$SZ`($ctx)
 351         $LD     r22,`6*$SZ`($ctx)
 352         addi    $inp,$inp,`16*$SZ`              ; advance inp
 353         $LD     r23,`7*$SZ`($ctx)
 354         add     $A,$A,r16
 355         add     $B,$B,r17
 356         $PUSH   $inp,`$FRAME-$SIZE_T*23`($sp)
 357         add     $C,$C,r18
 358         $ST     $A,`0*$SZ`($ctx)
 359         add     $D,$D,r19
 360         $ST     $B,`1*$SZ`($ctx)
 361         add     $E,$E,r20
 362         $ST     $C,`2*$SZ`($ctx)
 363         add     $F,$F,r21
 364         $ST     $D,`3*$SZ`($ctx)
 365         add     $G,$G,r22
 366         $ST     $E,`4*$SZ`($ctx)
 367         add     $H,$H,r23
 368         $ST     $F,`5*$SZ`($ctx)
 369         $ST     $G,`6*$SZ`($ctx)
 370         $UCMP   $inp,$num
 371         $ST     $H,`7*$SZ`($ctx)
 372         bne     Lsha2_block_private
 373         blr
 374 ___
 375
 376 # Ugly hack here, because PPC assembler syntax seem to vary too
 377 # much from platforms to platform...
 378 $code.=<<___;
 379 .align  6
 380 LPICmeup:
 381         bl      LPIC
 382         addi    $Tbl,$Tbl,`64-4`        ; "distance" between . and last nop
 383         b       LPICedup
 384         nop
 385         nop
 386         nop
 387         nop
 388         nop
 389 LPIC:   mflr    $Tbl
 390         blr
 391         nop
 392         nop
 393         nop
 394         nop
 395         nop
 396         nop
 397 ___
 398 $code.=<<___ if ($SZ==8);
 399         .long   0x428a2f98,0xd728ae22,0x71374491,0x23ef65cd
 400         .long   0xb5c0fbcf,0xec4d3b2f,0xe9b5dba5,0x8189dbbc
 401         .long   0x3956c25b,0xf348b538,0x59f111f1,0xb605d019
 402         .long   0x923f82a4,0xaf194f9b,0xab1c5ed5,0xda6d8118
 403         .long   0xd807aa98,0xa3030242,0x12835b01,0x45706fbe
 404         .long   0x243185be,0x4ee4b28c,0x550c7dc3,0xd5ffb4e2
 405         .long   0x72be5d74,0xf27b896f,0x80deb1fe,0x3b1696b1
 406         .long   0x9bdc06a7,0x25c71235,0xc19bf174,0xcf692694
 407         .long   0xe49b69c1,0x9ef14ad2,0xefbe4786,0x384f25e3
 408         .long   0x0fc19dc6,0x8b8cd5b5,0x240ca1cc,0x77ac9c65
 409         .long   0x2de92c6f,0x592b0275,0x4a7484aa,0x6ea6e483
 410         .long   0x5cb0a9dc,0xbd41fbd4,0x76f988da,0x831153b5
 411         .long   0x983e5152,0xee66dfab,0xa831c66d,0x2db43210
 412         .long   0xb00327c8,0x98fb213f,0xbf597fc7,0xbeef0ee4
 413         .long   0xc6e00bf3,0x3da88fc2,0xd5a79147,0x930aa725
 414         .long   0x06ca6351,0xe003826f,0x14292967,0x0a0e6e70
 415         .long   0x27b70a85,0x46d22ffc,0x2e1b2138,0x5c26c926
 416         .long   0x4d2c6dfc,0x5ac42aed,0x53380d13,0x9d95b3df
 417         .long   0x650a7354,0x8baf63de,0x766a0abb,0x3c77b2a8
 418         .long   0x81c2c92e,0x47edaee6,0x92722c85,0x1482353b
 419         .long   0xa2bfe8a1,0x4cf10364,0xa81a664b,0xbc423001
 420         .long   0xc24b8b70,0xd0f89791,0xc76c51a3,0x0654be30
 421         .long   0xd192e819,0xd6ef5218,0xd6990624,0x5565a910
 422         .long   0xf40e3585,0x5771202a,0x106aa070,0x32bbd1b8
 423         .long   0x19a4c116,0xb8d2d0c8,0x1e376c08,0x5141ab53
 424         .long   0x2748774c,0xdf8eeb99,0x34b0bcb5,0xe19b48a8
 425         .long   0x391c0cb3,0xc5c95a63,0x4ed8aa4a,0xe3418acb
 426         .long   0x5b9cca4f,0x7763e373,0x682e6ff3,0xd6b2b8a3
 427         .long   0x748f82ee,0x5defb2fc,0x78a5636f,0x43172f60
 428         .long   0x84c87814,0xa1f0ab72,0x8cc70208,0x1a6439ec
 429         .long   0x90befffa,0x23631e28,0xa4506ceb,0xde82bde9
 430         .long   0xbef9a3f7,0xb2c67915,0xc67178f2,0xe372532b
 431         .long   0xca273ece,0xea26619c,0xd186b8c7,0x21c0c207
 432         .long   0xeada7dd6,0xcde0eb1e,0xf57d4f7f,0xee6ed178
 433         .long   0x06f067aa,0x72176fba,0x0a637dc5,0xa2c898a6
 434         .long   0x113f9804,0xbef90dae,0x1b710b35,0x131c471b
 435         .long   0x28db77f5,0x23047d84,0x32caab7b,0x40c72493
 436         .long   0x3c9ebe0a,0x15c9bebc,0x431d67c4,0x9c100d4c
 437         .long   0x4cc5d4be,0xcb3e42b6,0x597f299c,0xfc657e2a
 438         .long   0x5fcb6fab,0x3ad6faec,0x6c44198c,0x4a475817
 439 ___
 440 $code.=<<___ if ($SZ==4);
 441         .long   0x428a2f98,0x71374491,0xb5c0fbcf,0xe9b5dba5
 442         .long   0x3956c25b,0x59f111f1,0x923f82a4,0xab1c5ed5
 443         .long   0xd807aa98,0x12835b01,0x243185be,0x550c7dc3
 444         .long   0x72be5d74,0x80deb1fe,0x9bdc06a7,0xc19bf174
 445         .long   0xe49b69c1,0xefbe4786,0x0fc19dc6,0x240ca1cc
 446         .long   0x2de92c6f,0x4a7484aa,0x5cb0a9dc,0x76f988da
 447         .long   0x983e5152,0xa831c66d,0xb00327c8,0xbf597fc7
 448         .long   0xc6e00bf3,0xd5a79147,0x06ca6351,0x14292967
 449         .long   0x27b70a85,0x2e1b2138,0x4d2c6dfc,0x53380d13
 450         .long   0x650a7354,0x766a0abb,0x81c2c92e,0x92722c85
 451         .long   0xa2bfe8a1,0xa81a664b,0xc24b8b70,0xc76c51a3
 452         .long   0xd192e819,0xd6990624,0xf40e3585,0x106aa070
 453         .long   0x19a4c116,0x1e376c08,0x2748774c,0x34b0bcb5
 454         .long   0x391c0cb3,0x4ed8aa4a,0x5b9cca4f,0x682e6ff3
 455         .long   0x748f82ee,0x78a5636f,0x84c87814,0x8cc70208
 456         .long   0x90befffa,0xa4506ceb,0xbef9a3f7,0xc67178f2
 457 ___
 458
 459 $code =~ s/\`([^\`]*)\`/eval $1/gem;
 460 print $code;
 461 close STDOUT;