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#!/usr/bin/env perl
# ====================================================================
# Written by Andy Polyakov <appro@fy.chalmers.se> 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 s390x.
# April 2007.
#
# Performance is >30% better than gcc 3.3 generated code. But the real
# twist is that SHA1 hardware support is detected and utilized. In
# which case performance can reach further >8x for larger chunks.
$kimdfunc=1; # magic function code for kimd instruction
$output=shift;
open STDOUT,">$output";
$t0="%r0";
$t1="%r1";
$ctx="%r2";
$inp="%r3";
$len="%r4";
$A="%r5";
$B="%r6";
$C="%r7";
$D="%r8";
$E="%r9"; @V=($A,$B,$C,$D,$E);
$K_00_19="%r10";
$K_20_39="%r11";
$K_40_59="%r12";
$K_60_79="%r13";
$Xi="%r14";
$sp="%r15";
$frame=160+16*4;
sub BODY_00_15 {
my ($i,$a,$b,$c,$d,$e)=@_;
my $xi=($i&1)?$Xi:$t1;
$code.=<<___ if ($i<16 && !($i&1));
lg $Xi,`$i*4`($inp)
___
$code.=<<___;
alr $e,$K_00_19 ### $i
rll $t0,$a,5
alr $e,$t0
lr $t0,$d
xr $t0,$c
nr $t0,$b
xr $t0,$d
alr $e,$t0
rll $b,$b,30
___
$code.=<<___ if ($i<16 && !($i&1));
srlg $xi,$Xi,32
stg $Xi,`160+$i*4`($sp)
___
$code.=<<___;
alr $e,$xi
___
}
sub Xupdate {
my $i=shift;
return if ($i&1); # Xupdate is vectorized and executed every 2nd cycle
$code.=<<___;
lg $Xi,`160+4*($i%16)`($sp) ### Xupdate($i)
xg $Xi,`160+4*(($i+2)%16)`($sp)
xg $Xi,`160+4*(($i+8)%16)`($sp)
___
if ((($i+13)%16)==15) {
$code.=<<___;
llgf $t0,`160+4*15`($sp)
x $Xi,`160+0`($sp)
sllg $t0,$t0,32
xgr $Xi,$t0
___
} else {
$code.=<<___;
xg $Xi,`160+4*(($i+13)%16)`($sp)
___
}
$code.=<<___;
rll $Xi,$Xi,1
rllg $t1,$Xi,32
rll $t1,$t1,1
rllg $Xi,$t1,32
stg $Xi,`160+4*($i%16)`($sp)
___
}
sub BODY_16_19 {
&Xupdate(@_[0]);
&BODY_00_15(@_);
}
sub BODY_20_39 {
my ($i,$a,$b,$c,$d,$e)=@_;
my $xi=($i&1)?$Xi:$t1;
my $K_XX_XX=($i<40)?$K_20_39:$K_60_79;
&Xupdate($i);
$code.=<<___;
alr $e,$K_XX_XX ### $i
rll $t0,$a,5
alr $e,$t0
lr $t0,$b
xr $t0,$c
xr $t0,$d
alr $e,$t0
rll $b,$b,30
alr $e,$xi
___
}
sub BODY_40_59 {
my ($i,$a,$b,$c,$d,$e)=@_;
my $xi=($i&1)?$Xi:$t1;
&Xupdate($i);
$code.=<<___;
alr $e,$K_40_59 ### $i
rll $t0,$a,5
alr $e,$t0
lr $t0,$b
or $t0,$c
nr $t0,$d
alr $e,$xi
lr $t1,$b
nr $t1,$c
or $t0,$t1
alr $e,$t0
rll $b,$b,30
___
}
$code.=<<___;
.text
.globl sha1_block_data_order
.type sha1_block_data_order,\@function
sha1_block_data_order:
___
$code.=<<___ if ($kimdfunc);
lghi %r0,0
la %r1,16($sp)
.long 0xb93e0002 # kimd %r0,%r2
lg %r0,16($sp)
tmhh %r0,`0x8000>>$kimdfunc`
jz .Lsoftware
lghi %r0,$kimdfunc
lgr %r1,$ctx
lgr %r2,$inp
sllg %r3,$len,6
.long 0xb93e0002 # kimd %r0,%r2
br %r14
.Lsoftware:
___
$code.=<<___;
stmg %r6,%r15,48($sp)
lgr %r0,$sp
aghi $sp,-$frame
stg %r0,0($sp)
sllg $len,$len,6
la $len,0($inp,$len)
llgf $A,0($ctx)
llgf $B,4($ctx)
llgf $C,8($ctx)
llgf $D,12($ctx)
llgf $E,16($ctx)
llilh $K_00_19,0x5a82
oill $K_00_19,0x7999
llilh $K_20_39,0x6ed9
oill $K_20_39,0xeba1
llilh $K_40_59,0x8f1b
oill $K_40_59,0xbcdc
llilh $K_60_79,0xca62
oill $K_60_79,0xc1d6
.Lloop:
___
for ($i=0;$i<16;$i++) { &BODY_00_15($i,@V); unshift(@V,pop(@V)); }
for (;$i<20;$i++) { &BODY_16_19($i,@V); unshift(@V,pop(@V)); }
for (;$i<40;$i++) { &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
for (;$i<60;$i++) { &BODY_40_59($i,@V); unshift(@V,pop(@V)); }
for (;$i<80;$i++) { &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
al $A,0($ctx)
al $B,4($ctx)
al $C,8($ctx)
al $D,12($ctx)
al $E,16($ctx)
st $A,0($ctx)
st $B,4($ctx)
st $C,8($ctx)
st $D,12($ctx)
st $E,16($ctx)
la $inp,64($inp)
clgr $inp,$len
jne .Lloop
lmg %r6,%r15,`$frame+48`($sp)
br %r14
.size sha1_block_data_order,.-sha1_block_data_order
.string "SHA1 block transform for s390x, CRYPTOGAMS by <appro\@openssl.org>"
___
$code =~ s/\`([^\`]*)\`/eval $1/gem;
print $code;
close STDOUT;
|
