openssl/crypto/bn/asm/s390x-gf2m.pl
David Benjamin 32be631ca1 Do not silently truncate files on perlasm errors
If one of the perlasm xlate drivers crashes, OpenSSL's build will
currently swallow the error and silently truncate the output to however
far the driver got. This will hopefully fail to build, but better to
check such things.

Handle this by checking for errors when closing STDOUT (which is a pipe
to the xlate driver).

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/10883)
2020-01-22 18:11:30 +01:00

231 lines
5.6 KiB
Raku

#! /usr/bin/env perl
# Copyright 2011-2016 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/.
# ====================================================================
#
# May 2011
#
# The module implements bn_GF2m_mul_2x2 polynomial multiplication used
# in bn_gf2m.c. It's kind of low-hanging mechanical port from C for
# the time being... gcc 4.3 appeared to generate poor code, therefore
# the effort. And indeed, the module delivers 55%-90%(*) improvement
# on heaviest ECDSA verify and ECDH benchmarks for 163- and 571-bit
# key lengths on z990, 30%-55%(*) - on z10, and 70%-110%(*) - on z196.
# This is for 64-bit build. In 32-bit "highgprs" case improvement is
# even higher, for example on z990 it was measured 80%-150%. ECDSA
# sign is modest 9%-12% faster. Keep in mind that these coefficients
# are not ones for bn_GF2m_mul_2x2 itself, as not all CPU time is
# burnt in it...
#
# (*) gcc 4.1 was observed to deliver better results than gcc 4.3,
# so that improvement coefficients can vary from one specific
# setup to another.
# $output is the last argument if it looks like a file (it has an extension)
# $flavour is the first argument if it doesn't look like a file
$output = $#ARGV >= 0 && $ARGV[$#ARGV] =~ m|\.\w+$| ? pop : undef;
$flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : undef;
if ($flavour =~ /3[12]/) {
$SIZE_T=4;
$g="";
} else {
$SIZE_T=8;
$g="g";
}
$output and open STDOUT,">$output";
$stdframe=16*$SIZE_T+4*8;
$rp="%r2";
$a1="%r3";
$a0="%r4";
$b1="%r5";
$b0="%r6";
$ra="%r14";
$sp="%r15";
@T=("%r0","%r1");
@i=("%r12","%r13");
($a1,$a2,$a4,$a8,$a12,$a48)=map("%r$_",(6..11));
($lo,$hi,$b)=map("%r$_",(3..5)); $a=$lo; $mask=$a8;
$code.=<<___;
.text
.type _mul_1x1,\@function
.align 16
_mul_1x1:
lgr $a1,$a
sllg $a2,$a,1
sllg $a4,$a,2
sllg $a8,$a,3
srag $lo,$a1,63 # broadcast 63rd bit
nihh $a1,0x1fff
srag @i[0],$a2,63 # broadcast 62nd bit
nihh $a2,0x3fff
srag @i[1],$a4,63 # broadcast 61st bit
nihh $a4,0x7fff
ngr $lo,$b
ngr @i[0],$b
ngr @i[1],$b
lghi @T[0],0
lgr $a12,$a1
stg @T[0],`$stdframe+0*8`($sp) # tab[0]=0
xgr $a12,$a2
stg $a1,`$stdframe+1*8`($sp) # tab[1]=a1
lgr $a48,$a4
stg $a2,`$stdframe+2*8`($sp) # tab[2]=a2
xgr $a48,$a8
stg $a12,`$stdframe+3*8`($sp) # tab[3]=a1^a2
xgr $a1,$a4
stg $a4,`$stdframe+4*8`($sp) # tab[4]=a4
xgr $a2,$a4
stg $a1,`$stdframe+5*8`($sp) # tab[5]=a1^a4
xgr $a12,$a4
stg $a2,`$stdframe+6*8`($sp) # tab[6]=a2^a4
xgr $a1,$a48
stg $a12,`$stdframe+7*8`($sp) # tab[7]=a1^a2^a4
xgr $a2,$a48
stg $a8,`$stdframe+8*8`($sp) # tab[8]=a8
xgr $a12,$a48
stg $a1,`$stdframe+9*8`($sp) # tab[9]=a1^a8
xgr $a1,$a4
stg $a2,`$stdframe+10*8`($sp) # tab[10]=a2^a8
xgr $a2,$a4
stg $a12,`$stdframe+11*8`($sp) # tab[11]=a1^a2^a8
xgr $a12,$a4
stg $a48,`$stdframe+12*8`($sp) # tab[12]=a4^a8
srlg $hi,$lo,1
stg $a1,`$stdframe+13*8`($sp) # tab[13]=a1^a4^a8
sllg $lo,$lo,63
stg $a2,`$stdframe+14*8`($sp) # tab[14]=a2^a4^a8
srlg @T[0],@i[0],2
stg $a12,`$stdframe+15*8`($sp) # tab[15]=a1^a2^a4^a8
lghi $mask,`0xf<<3`
sllg $a1,@i[0],62
sllg @i[0],$b,3
srlg @T[1],@i[1],3
ngr @i[0],$mask
sllg $a2,@i[1],61
srlg @i[1],$b,4-3
xgr $hi,@T[0]
ngr @i[1],$mask
xgr $lo,$a1
xgr $hi,@T[1]
xgr $lo,$a2
xg $lo,$stdframe(@i[0],$sp)
srlg @i[0],$b,8-3
ngr @i[0],$mask
___
for($n=1;$n<14;$n++) {
$code.=<<___;
lg @T[1],$stdframe(@i[1],$sp)
srlg @i[1],$b,`($n+2)*4`-3
sllg @T[0],@T[1],`$n*4`
ngr @i[1],$mask
srlg @T[1],@T[1],`64-$n*4`
xgr $lo,@T[0]
xgr $hi,@T[1]
___
push(@i,shift(@i)); push(@T,shift(@T));
}
$code.=<<___;
lg @T[1],$stdframe(@i[1],$sp)
sllg @T[0],@T[1],`$n*4`
srlg @T[1],@T[1],`64-$n*4`
xgr $lo,@T[0]
xgr $hi,@T[1]
lg @T[0],$stdframe(@i[0],$sp)
sllg @T[1],@T[0],`($n+1)*4`
srlg @T[0],@T[0],`64-($n+1)*4`
xgr $lo,@T[1]
xgr $hi,@T[0]
br $ra
.size _mul_1x1,.-_mul_1x1
.globl bn_GF2m_mul_2x2
.type bn_GF2m_mul_2x2,\@function
.align 16
bn_GF2m_mul_2x2:
stm${g} %r3,%r15,3*$SIZE_T($sp)
lghi %r1,-$stdframe-128
la %r0,0($sp)
la $sp,0(%r1,$sp) # alloca
st${g} %r0,0($sp) # back chain
___
if ($SIZE_T==8) {
my @r=map("%r$_",(6..9));
$code.=<<___;
bras $ra,_mul_1x1 # a1·b1
stmg $lo,$hi,16($rp)
lg $a,`$stdframe+128+4*$SIZE_T`($sp)
lg $b,`$stdframe+128+6*$SIZE_T`($sp)
bras $ra,_mul_1x1 # a0·b0
stmg $lo,$hi,0($rp)
lg $a,`$stdframe+128+3*$SIZE_T`($sp)
lg $b,`$stdframe+128+5*$SIZE_T`($sp)
xg $a,`$stdframe+128+4*$SIZE_T`($sp)
xg $b,`$stdframe+128+6*$SIZE_T`($sp)
bras $ra,_mul_1x1 # (a0+a1)·(b0+b1)
lmg @r[0],@r[3],0($rp)
xgr $lo,$hi
xgr $hi,@r[1]
xgr $lo,@r[0]
xgr $hi,@r[2]
xgr $lo,@r[3]
xgr $hi,@r[3]
xgr $lo,$hi
stg $hi,16($rp)
stg $lo,8($rp)
___
} else {
$code.=<<___;
sllg %r3,%r3,32
sllg %r5,%r5,32
or %r3,%r4
or %r5,%r6
bras $ra,_mul_1x1
rllg $lo,$lo,32
rllg $hi,$hi,32
stmg $lo,$hi,0($rp)
___
}
$code.=<<___;
lm${g} %r6,%r15,`$stdframe+128+6*$SIZE_T`($sp)
br $ra
.size bn_GF2m_mul_2x2,.-bn_GF2m_mul_2x2
.string "GF(2^m) Multiplication for s390x, CRYPTOGAMS by <appro\@openssl.org>"
___
$code =~ s/\`([^\`]*)\`/eval($1)/gem;
print $code;
close STDOUT or die "error closing STDOUT";