release/src/router/openssl/crypto/sha/asm/sha1-mips.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 # SHA1 block procedure for MIPS.
  11
  12 # Performance improvement is 30% on unaligned input. The "secret" is
  13 # to deploy lwl/lwr pair to load unaligned input. One could have
  14 # vectorized Xupdate on MIPSIII/IV, but the goal was to code MIPS32-
  15 # compatible subroutine. There is room for minor optimization on
  16 # little-endian platforms...
  17
  18 ######################################################################
  19 # There is a number of MIPS ABI in use, O32 and N32/64 are most
  20 # widely used. Then there is a new contender: NUBI. It appears that if
  21 # one picks the latter, it's possible to arrange code in ABI neutral
  22 # manner. Therefore let's stick to NUBI register layout:
  23 #
  24 ($zero,$at,$t0,$t1,$t2)=map("\$$_",(0..2,24,25));
  25 ($a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7)=map("\$$_",(4..11));
  26 ($s0,$s1,$s2,$s3,$s4,$s5,$s6,$s7,$s8,$s9,$s10,$s11)=map("\$$_",(12..23));
  27 ($gp,$tp,$sp,$fp,$ra)=map("\$$_",(3,28..31));
  28 #
  29 # The return value is placed in $a0. Following coding rules facilitate
  30 # interoperability:
  31 #
  32 # - never ever touch $tp, "thread pointer", former $gp;
  33 # - copy return value to $t0, former $v0 [or to $a0 if you're adapting
  34 #   old code];
  35 # - on O32 populate $a4-$a7 with 'lw $aN,4*N($sp)' if necessary;
  36 #
  37 # For reference here is register layout for N32/64 MIPS ABIs:
  38 #
  39 # ($zero,$at,$v0,$v1)=map("\$$_",(0..3));
  40 # ($a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7)=map("\$$_",(4..11));
  41 # ($t0,$t1,$t2,$t3,$t8,$t9)=map("\$$_",(12..15,24,25));
  42 # ($s0,$s1,$s2,$s3,$s4,$s5,$s6,$s7)=map("\$$_",(16..23));
  43 # ($gp,$sp,$fp,$ra)=map("\$$_",(28..31));
  44 #
  45 $flavour = shift; # supported flavours are o32,n32,64,nubi32,nubi64
  46
  47 if ($flavour =~ /64|n32/i) {
  48         $PTR_ADD="dadd";        # incidentally works even on n32
  49         $PTR_SUB="dsub";        # incidentally works even on n32
  50         $REG_S="sd";
  51         $REG_L="ld";
  52         $PTR_SLL="dsll";        # incidentally works even on n32
  53         $SZREG=8;
  54 } else {
  55         $PTR_ADD="add";
  56         $PTR_SUB="sub";
  57         $REG_S="sw";
  58         $REG_L="lw";
  59         $PTR_SLL="sll";
  60         $SZREG=4;
  61 }
  62 #
  63 # <appro@openssl.org>
  64 #
  65 ######################################################################
  66
  67 $big_endian=(`echo MIPSEL | $ENV{CC} -E -P -`=~/MIPSEL/)?1:0;
  68
  69 for (@ARGV) {   $output=$_ if (/^\w[\w\-]*\.\w+$/);   }
  70 open STDOUT,">$output";
  71
  72 if (!defined($big_endian))
  73             {   $big_endian=(unpack('L',pack('N',1))==1);   }
  74
  75 # offsets of the Most and Least Significant Bytes
  76 $MSB=$big_endian?0:3;
  77 $LSB=3&~$MSB;
  78
  79 @X=map("\$$_",(8..23)); # a4-a7,s0-s11
  80
  81 $ctx=$a0;
  82 $inp=$a1;
  83 $num=$a2;
  84 $A="\$1";
  85 $B="\$2";
  86 $C="\$3";
  87 $D="\$7";
  88 $E="\$24";      @V=($A,$B,$C,$D,$E);
  89 $t0="\$25";
  90 $t1=$num;       # $num is offloaded to stack
  91 $t2="\$30";     # fp
  92 $K="\$31";      # ra
  93
  94 sub BODY_00_14 {
  95 my ($i,$a,$b,$c,$d,$e)=@_;
  96 my $j=$i+1;
  97 $code.=<<___    if (!$big_endian);
  98         srl     $t0,@X[$i],24   # byte swap($i)
  99         srl     $t1,@X[$i],8
 100         andi    $t2,@X[$i],0xFF00
 101         sll     @X[$i],@X[$i],24
 102         andi    $t1,0xFF00
 103         sll     $t2,$t2,8
 104         or      @X[$i],$t0
 105         or      $t1,$t2
 106         or      @X[$i],$t1
 107 ___
 108 $code.=<<___;
 109          lwl    @X[$j],$j*4+$MSB($inp)
 110         sll     $t0,$a,5        # $i
 111         addu    $e,$K
 112          lwr    @X[$j],$j*4+$LSB($inp)
 113         srl     $t1,$a,27
 114         addu    $e,$t0
 115         xor     $t0,$c,$d
 116         addu    $e,$t1
 117         sll     $t2,$b,30
 118         and     $t0,$b
 119         srl     $b,$b,2
 120         xor     $t0,$d
 121         addu    $e,@X[$i]
 122         or      $b,$t2
 123         addu    $e,$t0
 124 ___
 125 }
 126
 127 sub BODY_15_19 {
 128 my ($i,$a,$b,$c,$d,$e)=@_;
 129 my $j=$i+1;
 130
 131 $code.=<<___    if (!$big_endian && $i==15);
 132         srl     $t0,@X[$i],24   # byte swap($i)
 133         srl     $t1,@X[$i],8
 134         andi    $t2,@X[$i],0xFF00
 135         sll     @X[$i],@X[$i],24
 136         andi    $t1,0xFF00
 137         sll     $t2,$t2,8
 138         or      @X[$i],$t0
 139         or      @X[$i],$t1
 140         or      @X[$i],$t2
 141 ___
 142 $code.=<<___;
 143          xor    @X[$j%16],@X[($j+2)%16]
 144         sll     $t0,$a,5        # $i
 145         addu    $e,$K
 146         srl     $t1,$a,27
 147         addu    $e,$t0
 148          xor    @X[$j%16],@X[($j+8)%16]
 149         xor     $t0,$c,$d
 150         addu    $e,$t1
 151          xor    @X[$j%16],@X[($j+13)%16]
 152         sll     $t2,$b,30
 153         and     $t0,$b
 154          srl    $t1,@X[$j%16],31
 155          addu   @X[$j%16],@X[$j%16]
 156         srl     $b,$b,2
 157         xor     $t0,$d
 158          or     @X[$j%16],$t1
 159         addu    $e,@X[$i%16]
 160         or      $b,$t2
 161         addu    $e,$t0
 162 ___
 163 }
 164
 165 sub BODY_20_39 {
 166 my ($i,$a,$b,$c,$d,$e)=@_;
 167 my $j=$i+1;
 168 $code.=<<___ if ($i<79);
 169          xor    @X[$j%16],@X[($j+2)%16]
 170         sll     $t0,$a,5        # $i
 171         addu    $e,$K
 172         srl     $t1,$a,27
 173         addu    $e,$t0
 174          xor    @X[$j%16],@X[($j+8)%16]
 175         xor     $t0,$c,$d
 176         addu    $e,$t1
 177          xor    @X[$j%16],@X[($j+13)%16]
 178         sll     $t2,$b,30
 179         xor     $t0,$b
 180          srl    $t1,@X[$j%16],31
 181          addu   @X[$j%16],@X[$j%16]
 182         srl     $b,$b,2
 183         addu    $e,@X[$i%16]
 184          or     @X[$j%16],$t1
 185         or      $b,$t2
 186         addu    $e,$t0
 187 ___
 188 $code.=<<___ if ($i==79);
 189          lw     @X[0],0($ctx)
 190         sll     $t0,$a,5        # $i
 191         addu    $e,$K
 192          lw     @X[1],4($ctx)
 193         srl     $t1,$a,27
 194         addu    $e,$t0
 195          lw     @X[2],8($ctx)
 196         xor     $t0,$c,$d
 197         addu    $e,$t1
 198          lw     @X[3],12($ctx)
 199         sll     $t2,$b,30
 200         xor     $t0,$b
 201          lw     @X[4],16($ctx)
 202         srl     $b,$b,2
 203         addu    $e,@X[$i%16]
 204         or      $b,$t2
 205         addu    $e,$t0
 206 ___
 207 }
 208
 209 sub BODY_40_59 {
 210 my ($i,$a,$b,$c,$d,$e)=@_;
 211 my $j=$i+1;
 212 $code.=<<___ if ($i<79);
 213          xor    @X[$j%16],@X[($j+2)%16]
 214         sll     $t0,$a,5        # $i
 215         addu    $e,$K
 216         srl     $t1,$a,27
 217         addu    $e,$t0
 218          xor    @X[$j%16],@X[($j+8)%16]
 219         and     $t0,$c,$d
 220         addu    $e,$t1
 221          xor    @X[$j%16],@X[($j+13)%16]
 222         sll     $t2,$b,30
 223         addu    $e,$t0
 224          srl    $t1,@X[$j%16],31
 225         xor     $t0,$c,$d
 226          addu   @X[$j%16],@X[$j%16]
 227         and     $t0,$b
 228         srl     $b,$b,2
 229          or     @X[$j%16],$t1
 230         addu    $e,@X[$i%16]
 231         or      $b,$t2
 232         addu    $e,$t0
 233 ___
 234 }
 235
 236 $FRAMESIZE=16;  # large enough to accomodate NUBI saved registers
 237 $SAVED_REGS_MASK = ($flavour =~ /nubi/i) ? 0xc0fff008 : 0xc0ff0000;
 238
 239 $code=<<___;
 240 #ifdef OPENSSL_FIPSCANISTER
 241 # include <openssl/fipssyms.h>
 242 #endif
 243
 244 .text
 245
 246 .set    noat
 247 .set    noreorder
 248 .align  5
 249 .globl  sha1_block_data_order
 250 .ent    sha1_block_data_order
 251 sha1_block_data_order:
 252         .frame  $sp,$FRAMESIZE*$SZREG,$ra
 253         .mask   $SAVED_REGS_MASK,-$SZREG
 254         .set    noreorder
 255         $PTR_SUB $sp,$FRAMESIZE*$SZREG
 256         $REG_S  $ra,($FRAMESIZE-1)*$SZREG($sp)
 257         $REG_S  $fp,($FRAMESIZE-2)*$SZREG($sp)
 258         $REG_S  $s11,($FRAMESIZE-3)*$SZREG($sp)
 259         $REG_S  $s10,($FRAMESIZE-4)*$SZREG($sp)
 260         $REG_S  $s9,($FRAMESIZE-5)*$SZREG($sp)
 261         $REG_S  $s8,($FRAMESIZE-6)*$SZREG($sp)
 262         $REG_S  $s7,($FRAMESIZE-7)*$SZREG($sp)
 263         $REG_S  $s6,($FRAMESIZE-8)*$SZREG($sp)
 264         $REG_S  $s5,($FRAMESIZE-9)*$SZREG($sp)
 265         $REG_S  $s4,($FRAMESIZE-10)*$SZREG($sp)
 266 ___
 267 $code.=<<___ if ($flavour =~ /nubi/i);  # optimize non-nubi prologue
 268         $REG_S  $s3,($FRAMESIZE-11)*$SZREG($sp)
 269         $REG_S  $s2,($FRAMESIZE-12)*$SZREG($sp)
 270         $REG_S  $s1,($FRAMESIZE-13)*$SZREG($sp)
 271         $REG_S  $s0,($FRAMESIZE-14)*$SZREG($sp)
 272         $REG_S  $gp,($FRAMESIZE-15)*$SZREG($sp)
 273 ___
 274 $code.=<<___;
 275         $PTR_SLL $num,6
 276         $PTR_ADD $num,$inp
 277         $REG_S  $num,0($sp)
 278         lw      $A,0($ctx)
 279         lw      $B,4($ctx)
 280         lw      $C,8($ctx)
 281         lw      $D,12($ctx)
 282         b       .Loop
 283         lw      $E,16($ctx)
 284 .align  4
 285 .Loop:
 286         .set    reorder
 287         lwl     @X[0],$MSB($inp)
 288         lui     $K,0x5a82
 289         lwr     @X[0],$LSB($inp)
 290         ori     $K,0x7999       # K_00_19
 291 ___
 292 for ($i=0;$i<15;$i++)   { &BODY_00_14($i,@V); unshift(@V,pop(@V)); }
 293 for (;$i<20;$i++)       { &BODY_15_19($i,@V); unshift(@V,pop(@V)); }
 294 $code.=<<___;
 295         lui     $K,0x6ed9
 296         ori     $K,0xeba1       # K_20_39
 297 ___
 298 for (;$i<40;$i++)       { &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
 299 $code.=<<___;
 300         lui     $K,0x8f1b
 301         ori     $K,0xbcdc       # K_40_59
 302 ___
 303 for (;$i<60;$i++)       { &BODY_40_59($i,@V); unshift(@V,pop(@V)); }
 304 $code.=<<___;
 305         lui     $K,0xca62
 306         ori     $K,0xc1d6       # K_60_79
 307 ___
 308 for (;$i<80;$i++)       { &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
 309 $code.=<<___;
 310         $PTR_ADD $inp,64
 311         $REG_L  $num,0($sp)
 312
 313         addu    $A,$X[0]
 314         addu    $B,$X[1]
 315         sw      $A,0($ctx)
 316         addu    $C,$X[2]
 317         addu    $D,$X[3]
 318         sw      $B,4($ctx)
 319         addu    $E,$X[4]
 320         sw      $C,8($ctx)
 321         sw      $D,12($ctx)
 322         sw      $E,16($ctx)
 323         .set    noreorder
 324         bne     $inp,$num,.Loop
 325         nop
 326
 327         .set    noreorder
 328         $REG_L  $ra,($FRAMESIZE-1)*$SZREG($sp)
 329         $REG_L  $fp,($FRAMESIZE-2)*$SZREG($sp)
 330         $REG_L  $s11,($FRAMESIZE-3)*$SZREG($sp)
 331         $REG_L  $s10,($FRAMESIZE-4)*$SZREG($sp)
 332         $REG_L  $s9,($FRAMESIZE-5)*$SZREG($sp)
 333         $REG_L  $s8,($FRAMESIZE-6)*$SZREG($sp)
 334         $REG_L  $s7,($FRAMESIZE-7)*$SZREG($sp)
 335         $REG_L  $s6,($FRAMESIZE-8)*$SZREG($sp)
 336         $REG_L  $s5,($FRAMESIZE-9)*$SZREG($sp)
 337         $REG_L  $s4,($FRAMESIZE-10)*$SZREG($sp)
 338 ___
 339 $code.=<<___ if ($flavour =~ /nubi/i);
 340         $REG_L  $s3,($FRAMESIZE-11)*$SZREG($sp)
 341         $REG_L  $s2,($FRAMESIZE-12)*$SZREG($sp)
 342         $REG_L  $s1,($FRAMESIZE-13)*$SZREG($sp)
 343         $REG_L  $s0,($FRAMESIZE-14)*$SZREG($sp)
 344         $REG_L  $gp,($FRAMESIZE-15)*$SZREG($sp)
 345 ___
 346 $code.=<<___;
 347         jr      $ra
 348         $PTR_ADD $sp,$FRAMESIZE*$SZREG
 349 .end    sha1_block_data_order
 350 .rdata
 351 .asciiz "SHA1 for MIPS, CRYPTOGAMS by <appro\@openssl.org>"
 352 ___
 353 print $code;
 354 close STDOUT;