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#! /usr/bin/env perl
# Copyright 2009-2020 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the Apache License 2.0 (the "License"). You may not use
# this file except in compliance with the License. You can obtain a copy
# in the file LICENSE in the source distribution or at
# https://www.openssl.org/source/license.html
# ====================================================================
# Written by Andy Polyakov <appro@openssl.org> for the OpenSSL
# project. The module is, however, dual licensed under OpenSSL and
# CRYPTOGAMS licenses depending on where you obtain it. For further
# details see http://www.openssl.org/~appro/cryptogams/.
# ====================================================================
# SHA1 block procedure for Alpha.
# On 21264 performance is 33% better than code generated by vendor
# compiler, and 75% better than GCC [3.4], and in absolute terms is
# 8.7 cycles per processed byte. Implementation features vectorized
# byte swap, but not Xupdate.
@X=( "\$0", "\$1", "\$2", "\$3", "\$4", "\$5", "\$6", "\$7",
"\$8", "\$9", "\$10", "\$11", "\$12", "\$13", "\$14", "\$15");
$ctx="a0"; # $16
$inp="a1";
$num="a2";
$A="a3";
$B="a4"; # 20
$C="a5";
$D="t8";
$E="t9"; @V=($A,$B,$C,$D,$E);
$t0="t10"; # 24
$t1="t11";
$t2="ra";
$t3="t12";
$K="AT"; # 28
sub BODY_00_19 {
my ($i,$a,$b,$c,$d,$e)=@_;
my $j=$i+1;
$code.=<<___ if ($i==0);
ldq_u @X[0],0+0($inp)
ldq_u @X[1],0+7($inp)
___
$code.=<<___ if (!($i&1) && $i<14);
ldq_u @X[$i+2],($i+2)*4+0($inp)
ldq_u @X[$i+3],($i+2)*4+7($inp)
___
$code.=<<___ if (!($i&1) && $i<15);
extql @X[$i],$inp,@X[$i]
extqh @X[$i+1],$inp,@X[$i+1]
or @X[$i+1],@X[$i],@X[$i] # pair of 32-bit values are fetched
srl @X[$i],24,$t0 # vectorized byte swap
srl @X[$i],8,$t2
sll @X[$i],8,$t3
sll @X[$i],24,@X[$i]
zapnot $t0,0x11,$t0
zapnot $t2,0x22,$t2
zapnot @X[$i],0x88,@X[$i]
or $t0,$t2,$t0
zapnot $t3,0x44,$t3
sll $a,5,$t1
or @X[$i],$t0,@X[$i]
addl $K,$e,$e
and $b,$c,$t2
zapnot $a,0xf,$a
or @X[$i],$t3,@X[$i]
srl $a,27,$t0
bic $d,$b,$t3
sll $b,30,$b
extll @X[$i],4,@X[$i+1] # extract upper half
or $t2,$t3,$t2
addl @X[$i],$e,$e
addl $t1,$e,$e
srl $b,32,$t3
zapnot @X[$i],0xf,@X[$i]
addl $t0,$e,$e
addl $t2,$e,$e
or $t3,$b,$b
___
$code.=<<___ if (($i&1) && $i<15);
sll $a,5,$t1
addl $K,$e,$e
and $b,$c,$t2
zapnot $a,0xf,$a
srl $a,27,$t0
addl @X[$i%16],$e,$e
bic $d,$b,$t3
sll $b,30,$b
or $t2,$t3,$t2
addl $t1,$e,$e
srl $b,32,$t3
zapnot @X[$i],0xf,@X[$i]
addl $t0,$e,$e
addl $t2,$e,$e
or $t3,$b,$b
___
$code.=<<___ if ($i>=15); # with forward Xupdate
sll $a,5,$t1
addl $K,$e,$e
and $b,$c,$t2
xor @X[($j+2)%16],@X[$j%16],@X[$j%16]
zapnot $a,0xf,$a
addl @X[$i%16],$e,$e
bic $d,$b,$t3
xor @X[($j+8)%16],@X[$j%16],@X[$j%16]
srl $a,27,$t0
addl $t1,$e,$e
or $t2,$t3,$t2
xor @X[($j+13)%16],@X[$j%16],@X[$j%16]
sll $b,30,$b
addl $t0,$e,$e
srl @X[$j%16],31,$t1
addl $t2,$e,$e
srl $b,32,$t3
addl @X[$j%16],@X[$j%16],@X[$j%16]
or $t3,$b,$b
zapnot @X[$i%16],0xf,@X[$i%16]
or $t1,@X[$j%16],@X[$j%16]
___
}
sub BODY_20_39 {
my ($i,$a,$b,$c,$d,$e)=@_;
my $j=$i+1;
$code.=<<___ if ($i<79); # with forward Xupdate
sll $a,5,$t1
addl $K,$e,$e
zapnot $a,0xf,$a
xor @X[($j+2)%16],@X[$j%16],@X[$j%16]
sll $b,30,$t3
addl $t1,$e,$e
xor $b,$c,$t2
xor @X[($j+8)%16],@X[$j%16],@X[$j%16]
srl $b,2,$b
addl @X[$i%16],$e,$e
xor $d,$t2,$t2
xor @X[($j+13)%16],@X[$j%16],@X[$j%16]
srl @X[$j%16],31,$t1
addl $t2,$e,$e
srl $a,27,$t0
addl @X[$j%16],@X[$j%16],@X[$j%16]
or $t3,$b,$b
addl $t0,$e,$e
or $t1,@X[$j%16],@X[$j%16]
___
$code.=<<___ if ($i<77);
zapnot @X[$i%16],0xf,@X[$i%16]
___
$code.=<<___ if ($i==79); # with context fetch
sll $a,5,$t1
addl $K,$e,$e
zapnot $a,0xf,$a
ldl @X[0],0($ctx)
sll $b,30,$t3
addl $t1,$e,$e
xor $b,$c,$t2
ldl @X[1],4($ctx)
srl $b,2,$b
addl @X[$i%16],$e,$e
xor $d,$t2,$t2
ldl @X[2],8($ctx)
srl $a,27,$t0
addl $t2,$e,$e
ldl @X[3],12($ctx)
or $t3,$b,$b
addl $t0,$e,$e
ldl @X[4],16($ctx)
___
}
sub BODY_40_59 {
my ($i,$a,$b,$c,$d,$e)=@_;
my $j=$i+1;
$code.=<<___; # with forward Xupdate
sll $a,5,$t1
addl $K,$e,$e
zapnot $a,0xf,$a
xor @X[($j+2)%16],@X[$j%16],@X[$j%16]
srl $a,27,$t0
and $b,$c,$t2
and $b,$d,$t3
xor @X[($j+8)%16],@X[$j%16],@X[$j%16]
sll $b,30,$b
addl $t1,$e,$e
xor @X[($j+13)%16],@X[$j%16],@X[$j%16]
srl @X[$j%16],31,$t1
addl $t0,$e,$e
or $t2,$t3,$t2
and $c,$d,$t3
or $t2,$t3,$t2
srl $b,32,$t3
addl @X[$i%16],$e,$e
addl @X[$j%16],@X[$j%16],@X[$j%16]
or $t3,$b,$b
addl $t2,$e,$e
or $t1,@X[$j%16],@X[$j%16]
zapnot @X[$i%16],0xf,@X[$i%16]
___
}
$code=<<___;
#ifdef __linux__
#include <asm/regdef.h>
#else
#include <asm.h>
#include <regdef.h>
#endif
.text
.set noat
.set noreorder
.globl sha1_block_data_order
.align 5
.ent sha1_block_data_order
sha1_block_data_order:
lda sp,-64(sp)
stq ra,0(sp)
stq s0,8(sp)
stq s1,16(sp)
stq s2,24(sp)
stq s3,32(sp)
stq s4,40(sp)
stq s5,48(sp)
stq fp,56(sp)
.mask 0x0400fe00,-64
.frame sp,64,ra
.prologue 0
ldl $A,0($ctx)
ldl $B,4($ctx)
sll $num,6,$num
ldl $C,8($ctx)
ldl $D,12($ctx)
ldl $E,16($ctx)
addq $inp,$num,$num
.Lloop:
.set noreorder
ldah $K,23170(zero)
zapnot $B,0xf,$B
lda $K,31129($K) # K_00_19
___
for ($i=0;$i<20;$i++) { &BODY_00_19($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
ldah $K,28378(zero)
lda $K,-5215($K) # K_20_39
___
for (;$i<40;$i++) { &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
ldah $K,-28900(zero)
lda $K,-17188($K) # K_40_59
___
for (;$i<60;$i++) { &BODY_40_59($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
ldah $K,-13725(zero)
lda $K,-15914($K) # K_60_79
___
for (;$i<80;$i++) { &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
addl @X[0],$A,$A
addl @X[1],$B,$B
addl @X[2],$C,$C
addl @X[3],$D,$D
addl @X[4],$E,$E
stl $A,0($ctx)
stl $B,4($ctx)
addq $inp,64,$inp
stl $C,8($ctx)
stl $D,12($ctx)
stl $E,16($ctx)
cmpult $inp,$num,$t1
bne $t1,.Lloop
.set noreorder
ldq ra,0(sp)
ldq s0,8(sp)
ldq s1,16(sp)
ldq s2,24(sp)
ldq s3,32(sp)
ldq s4,40(sp)
ldq s5,48(sp)
ldq fp,56(sp)
lda sp,64(sp)
ret (ra)
.end sha1_block_data_order
.ascii "SHA1 block transform for Alpha, CRYPTOGAMS by <appro\@openssl.org>"
.align 2
___
$output=pop and open STDOUT,">$output";
print $code;
close STDOUT or die "error closing STDOUT: $!";
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