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#!/usr/bin/env perl
# Copyright 2017-2020 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/.
# ====================================================================
#
# Keccak-1600 for s390x.
#
# June 2017.
#
# Below code is [lane complementing] KECCAK_2X implementation (see
# sha/keccak1600.c) with C[5] and D[5] held in register bank. Though
# instead of actually unrolling the loop pair-wise I simply flip
# pointers to T[][] and A[][] at the end of round. Since number of
# rounds is even, last round writes to A[][] and everything works out.
# In the nutshell it's transliteration of x86_64 module, because both
# architectures have similar capabilities/limitations. Performance
# measurement is problematic as I don't have access to an idle system.
# It looks like z13 processes one byte [out of long message] in ~14
# cycles. At least the result is consistent with estimate based on
# amount of instruction and assumed instruction issue rate. It's ~2.5x
# faster than compiler-generated code.
# $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";
my @A = map([ 8*$_, 8*($_+1), 8*($_+2), 8*($_+3), 8*($_+4) ], (0,5,10,15,20));
my @C = map("%r$_",(0,1,5..7));
my @D = map("%r$_",(8..12));
my @T = map("%r$_",(13..14));
my ($src,$dst,$iotas) = map("%r$_",(2..4));
my $sp = "%r15";
$stdframe=16*$SIZE_T+4*8;
$frame=$stdframe+25*8;
my @rhotates = ([ 0, 1, 62, 28, 27 ],
[ 36, 44, 6, 55, 20 ],
[ 3, 10, 43, 25, 39 ],
[ 41, 45, 15, 21, 8 ],
[ 18, 2, 61, 56, 14 ]);
{ my @C = @C; # copy, because we mess them up...
my @D = @D;
$code.=<<___;
.text
.type __KeccakF1600,\@function
.align 32
__KeccakF1600:
st${g} %r14,$SIZE_T*14($sp)
lg @C[0],$A[4][0]($src)
lg @C[1],$A[4][1]($src)
lg @C[2],$A[4][2]($src)
lg @C[3],$A[4][3]($src)
lg @C[4],$A[4][4]($src)
larl $iotas,iotas
j .Loop
.align 16
.Loop:
lg @D[0],$A[0][0]($src)
lg @D[1],$A[1][1]($src)
lg @D[2],$A[2][2]($src)
lg @D[3],$A[3][3]($src)
xgr @C[0],@D[0]
xg @C[1],$A[0][1]($src)
xg @C[2],$A[0][2]($src)
xg @C[3],$A[0][3]($src)
lgr @D[4],@C[4]
xg @C[4],$A[0][4]($src)
xg @C[0],$A[1][0]($src)
xgr @C[1],@D[1]
xg @C[2],$A[1][2]($src)
xg @C[3],$A[1][3]($src)
xg @C[4],$A[1][4]($src)
xg @C[0],$A[2][0]($src)
xg @C[1],$A[2][1]($src)
xgr @C[2],@D[2]
xg @C[3],$A[2][3]($src)
xg @C[4],$A[2][4]($src)
xg @C[0],$A[3][0]($src)
xg @C[1],$A[3][1]($src)
xg @C[2],$A[3][2]($src)
xgr @C[3],@D[3]
xg @C[4],$A[3][4]($src)
lgr @T[0],@C[2]
rllg @C[2],@C[2],1
xgr @C[2],@C[0] # D[1] = ROL64(C[2], 1) ^ C[0]
rllg @C[0],@C[0],1
xgr @C[0],@C[3] # D[4] = ROL64(C[0], 1) ^ C[3]
rllg @C[3],@C[3],1
xgr @C[3],@C[1] # D[2] = ROL64(C[3], 1) ^ C[1]
rllg @C[1],@C[1],1
xgr @C[1],@C[4] # D[0] = ROL64(C[1], 1) ^ C[4]
rllg @C[4],@C[4],1
xgr @C[4],@T[0] # D[3] = ROL64(C[4], 1) ^ C[2]
___
(@D[0..4], @C) = (@C[1..4,0], @D);
$code.=<<___;
xgr @C[1],@D[1]
xgr @C[2],@D[2]
xgr @C[3],@D[3]
rllg @C[1],@C[1],$rhotates[1][1]
xgr @C[4],@D[4]
rllg @C[2],@C[2],$rhotates[2][2]
xgr @C[0],@D[0]
lgr @T[0],@C[1]
ogr @C[1],@C[2]
rllg @C[3],@C[3],$rhotates[3][3]
xgr @C[1],@C[0] # C[0] ^ ( C[1] | C[2])
rllg @C[4],@C[4],$rhotates[4][4]
xg @C[1],0($iotas)
la $iotas,8($iotas)
stg @C[1],$A[0][0]($dst) # R[0][0] = C[0] ^ ( C[1] | C[2]) ^ iotas[i]
lgr @T[1],@C[4]
ngr @C[4],@C[3]
lghi @C[1],-1 # no 'not' instruction :-(
xgr @C[4],@C[2] # C[2] ^ ( C[4] & C[3])
xgr @C[2],@C[1] # not @C[2]
stg @C[4],$A[0][2]($dst) # R[0][2] = C[2] ^ ( C[4] & C[3])
ogr @C[2],@C[3]
xgr @C[2],@T[0] # C[1] ^ (~C[2] | C[3])
ngr @T[0],@C[0]
stg @C[2],$A[0][1]($dst) # R[0][1] = C[1] ^ (~C[2] | C[3])
xgr @T[0],@T[1] # C[4] ^ ( C[1] & C[0])
ogr @T[1],@C[0]
stg @T[0],$A[0][4]($dst) # R[0][4] = C[4] ^ ( C[1] & C[0])
xgr @T[1],@C[3] # C[3] ^ ( C[4] | C[0])
stg @T[1],$A[0][3]($dst) # R[0][3] = C[3] ^ ( C[4] | C[0])
lg @C[0],$A[0][3]($src)
lg @C[4],$A[4][2]($src)
lg @C[3],$A[3][1]($src)
lg @C[1],$A[1][4]($src)
lg @C[2],$A[2][0]($src)
xgr @C[0],@D[3]
xgr @C[4],@D[2]
rllg @C[0],@C[0],$rhotates[0][3]
xgr @C[3],@D[1]
rllg @C[4],@C[4],$rhotates[4][2]
xgr @C[1],@D[4]
rllg @C[3],@C[3],$rhotates[3][1]
xgr @C[2],@D[0]
lgr @T[0],@C[0]
ogr @C[0],@C[4]
rllg @C[1],@C[1],$rhotates[1][4]
xgr @C[0],@C[3] # C[3] ^ (C[0] | C[4])
rllg @C[2],@C[2],$rhotates[2][0]
stg @C[0],$A[1][3]($dst) # R[1][3] = C[3] ^ (C[0] | C[4])
lgr @T[1],@C[1]
ngr @C[1],@T[0]
lghi @C[0],-1 # no 'not' instruction :-(
xgr @C[1],@C[4] # C[4] ^ (C[1] & C[0])
xgr @C[4],@C[0] # not @C[4]
stg @C[1],$A[1][4]($dst) # R[1][4] = C[4] ^ (C[1] & C[0])
ogr @C[4],@C[3]
xgr @C[4],@C[2] # C[2] ^ (~C[4] | C[3])
ngr @C[3],@C[2]
stg @C[4],$A[1][2]($dst) # R[1][2] = C[2] ^ (~C[4] | C[3])
xgr @C[3],@T[1] # C[1] ^ (C[3] & C[2])
ogr @T[1],@C[2]
stg @C[3],$A[1][1]($dst) # R[1][1] = C[1] ^ (C[3] & C[2])
xgr @T[1],@T[0] # C[0] ^ (C[1] | C[2])
stg @T[1],$A[1][0]($dst) # R[1][0] = C[0] ^ (C[1] | C[2])
lg @C[2],$A[2][3]($src)
lg @C[3],$A[3][4]($src)
lg @C[1],$A[1][2]($src)
lg @C[4],$A[4][0]($src)
lg @C[0],$A[0][1]($src)
xgr @C[2],@D[3]
xgr @C[3],@D[4]
rllg @C[2],@C[2],$rhotates[2][3]
xgr @C[1],@D[2]
rllg @C[3],@C[3],$rhotates[3][4]
xgr @C[4],@D[0]
rllg @C[1],@C[1],$rhotates[1][2]
xgr @C[0],@D[1]
lgr @T[0],@C[2]
ngr @C[2],@C[3]
rllg @C[4],@C[4],$rhotates[4][0]
xgr @C[2],@C[1] # C[1] ^ ( C[2] & C[3])
lghi @T[1],-1 # no 'not' instruction :-(
stg @C[2],$A[2][1]($dst) # R[2][1] = C[1] ^ ( C[2] & C[3])
xgr @C[3],@T[1] # not @C[3]
lgr @T[1],@C[4]
ngr @C[4],@C[3]
rllg @C[0],@C[0],$rhotates[0][1]
xgr @C[4],@T[0] # C[2] ^ ( C[4] & ~C[3])
ogr @T[0],@C[1]
stg @C[4],$A[2][2]($dst) # R[2][2] = C[2] ^ ( C[4] & ~C[3])
xgr @T[0],@C[0] # C[0] ^ ( C[2] | C[1])
ngr @C[1],@C[0]
stg @T[0],$A[2][0]($dst) # R[2][0] = C[0] ^ ( C[2] | C[1])
xgr @C[1],@T[1] # C[4] ^ ( C[1] & C[0])
ogr @C[0],@T[1]
stg @C[1],$A[2][4]($dst) # R[2][4] = C[4] ^ ( C[1] & C[0])
xgr @C[0],@C[3] # ~C[3] ^ ( C[0] | C[4])
stg @C[0],$A[2][3]($dst) # R[2][3] = ~C[3] ^ ( C[0] | C[4])
lg @C[2],$A[2][1]($src)
lg @C[3],$A[3][2]($src)
lg @C[1],$A[1][0]($src)
lg @C[4],$A[4][3]($src)
lg @C[0],$A[0][4]($src)
xgr @C[2],@D[1]
xgr @C[3],@D[2]
rllg @C[2],@C[2],$rhotates[2][1]
xgr @C[1],@D[0]
rllg @C[3],@C[3],$rhotates[3][2]
xgr @C[4],@D[3]
rllg @C[1],@C[1],$rhotates[1][0]
xgr @C[0],@D[4]
rllg @C[4],@C[4],$rhotates[4][3]
lgr @T[0],@C[2]
ogr @C[2],@C[3]
lghi @T[1],-1 # no 'not' instruction :-(
xgr @C[2],@C[1] # C[1] ^ ( C[2] | C[3])
xgr @C[3],@T[1] # not @C[3]
stg @C[2],$A[3][1]($dst) # R[3][1] = C[1] ^ ( C[2] | C[3])
lgr @T[1],@C[4]
ogr @C[4],@C[3]
rllg @C[0],@C[0],$rhotates[0][4]
xgr @C[4],@T[0] # C[2] ^ ( C[4] | ~C[3])
ngr @T[0],@C[1]
stg @C[4],$A[3][2]($dst) # R[3][2] = C[2] ^ ( C[4] | ~C[3])
xgr @T[0],@C[0] # C[0] ^ ( C[2] & C[1])
ogr @C[1],@C[0]
stg @T[0],$A[3][0]($dst) # R[3][0] = C[0] ^ ( C[2] & C[1])
xgr @C[1],@T[1] # C[4] ^ ( C[1] | C[0])
ngr @C[0],@T[1]
stg @C[1],$A[3][4]($dst) # R[3][4] = C[4] ^ ( C[1] | C[0])
xgr @C[0],@C[3] # ~C[3] ^ ( C[0] & C[4])
stg @C[0],$A[3][3]($dst) # R[3][3] = ~C[3] ^ ( C[0] & C[4])
xg @D[2],$A[0][2]($src)
xg @D[3],$A[1][3]($src)
xg @D[1],$A[4][1]($src)
xg @D[4],$A[2][4]($src)
xgr $dst,$src # xchg $dst,$src
rllg @D[2],@D[2],$rhotates[0][2]
xg @D[0],$A[3][0]($src)
rllg @D[3],@D[3],$rhotates[1][3]
xgr $src,$dst
rllg @D[1],@D[1],$rhotates[4][1]
xgr $dst,$src
rllg @D[4],@D[4],$rhotates[2][4]
___
@C = @D[2..4,0,1];
$code.=<<___;
lgr @T[0],@C[0]
ngr @C[0],@C[1]
lghi @T[1],-1 # no 'not' instruction :-(
xgr @C[0],@C[4] # C[4] ^ ( C[0] & C[1])
xgr @C[1],@T[1] # not @C[1]
stg @C[0],$A[4][4]($src) # R[4][4] = C[4] ^ ( C[0] & C[1])
lgr @T[1],@C[2]
ngr @C[2],@C[1]
rllg @D[0],@D[0],$rhotates[3][0]
xgr @C[2],@T[0] # C[0] ^ ( C[2] & ~C[1])
ogr @T[0],@C[4]
stg @C[2],$A[4][0]($src) # R[4][0] = C[0] ^ ( C[2] & ~C[1])
xgr @T[0],@C[3] # C[3] ^ ( C[0] | C[4])
ngr @C[4],@C[3]
stg @T[0],$A[4][3]($src) # R[4][3] = C[3] ^ ( C[0] | C[4])
xgr @C[4],@T[1] # C[2] ^ ( C[4] & C[3])
ogr @C[3],@T[1]
stg @C[4],$A[4][2]($src) # R[4][2] = C[2] ^ ( C[4] & C[3])
xgr @C[3],@C[1] # ~C[1] ^ ( C[2] | C[3])
lgr @C[1],@C[0] # harmonize with the loop top
lgr @C[0],@T[0]
stg @C[3],$A[4][1]($src) # R[4][1] = ~C[1] ^ ( C[2] | C[3])
tmll $iotas,255
jnz .Loop
l${g} %r14,$SIZE_T*14($sp)
br %r14
.size __KeccakF1600,.-__KeccakF1600
___
}
{
$code.=<<___;
.type KeccakF1600,\@function
.align 32
KeccakF1600:
.LKeccakF1600:
lghi %r1,-$frame
stm${g} %r6,%r15,$SIZE_T*6($sp)
lgr %r0,$sp
la $sp,0(%r1,$sp)
st${g} %r0,0($sp)
lghi @D[0],-1 # no 'not' instruction :-(
lghi @D[1],-1
lghi @D[2],-1
lghi @D[3],-1
lghi @D[4],-1
lghi @T[0],-1
xg @D[0],$A[0][1]($src)
xg @D[1],$A[0][2]($src)
xg @D[2],$A[1][3]($src)
xg @D[3],$A[2][2]($src)
xg @D[4],$A[3][2]($src)
xg @T[0],$A[4][0]($src)
stmg @D[0],@D[1],$A[0][1]($src)
stg @D[2],$A[1][3]($src)
stg @D[3],$A[2][2]($src)
stg @D[4],$A[3][2]($src)
stg @T[0],$A[4][0]($src)
la $dst,$stdframe($sp)
bras %r14,__KeccakF1600
lghi @D[0],-1 # no 'not' instruction :-(
lghi @D[1],-1
lghi @D[2],-1
lghi @D[3],-1
lghi @D[4],-1
lghi @T[0],-1
xg @D[0],$A[0][1]($src)
xg @D[1],$A[0][2]($src)
xg @D[2],$A[1][3]($src)
xg @D[3],$A[2][2]($src)
xg @D[4],$A[3][2]($src)
xg @T[0],$A[4][0]($src)
stmg @D[0],@D[1],$A[0][1]($src)
stg @D[2],$A[1][3]($src)
stg @D[3],$A[2][2]($src)
stg @D[4],$A[3][2]($src)
stg @T[0],$A[4][0]($src)
lm${g} %r6,%r15,$frame+6*$SIZE_T($sp)
br %r14
.size KeccakF1600,.-KeccakF1600
___
}
{ my ($A_flat,$inp,$len,$bsz) = map("%r$_",(2..5));
$code.=<<___;
.globl SHA3_absorb
.type SHA3_absorb,\@function
.align 32
SHA3_absorb:
lghi %r1,-$frame
stm${g} %r5,%r15,$SIZE_T*5($sp)
lgr %r0,$sp
la $sp,0(%r1,$sp)
st${g} %r0,0($sp)
lghi @D[0],-1 # no 'not' instruction :-(
lghi @D[1],-1
lghi @D[2],-1
lghi @D[3],-1
lghi @D[4],-1
lghi @T[0],-1
xg @D[0],$A[0][1]($src)
xg @D[1],$A[0][2]($src)
xg @D[2],$A[1][3]($src)
xg @D[3],$A[2][2]($src)
xg @D[4],$A[3][2]($src)
xg @T[0],$A[4][0]($src)
stmg @D[0],@D[1],$A[0][1]($src)
stg @D[2],$A[1][3]($src)
stg @D[3],$A[2][2]($src)
stg @D[4],$A[3][2]($src)
stg @T[0],$A[4][0]($src)
.Loop_absorb:
cl${g}r $len,$bsz
jl .Ldone_absorb
srl${g} $bsz,3
la %r1,0($A_flat)
.Lblock_absorb:
lrvg %r0,0($inp)
la $inp,8($inp)
xg %r0,0(%r1)
a${g}hi $len,-8
stg %r0,0(%r1)
la %r1,8(%r1)
brct $bsz,.Lblock_absorb
stm${g} $inp,$len,$frame+3*$SIZE_T($sp)
la $dst,$stdframe($sp)
bras %r14,__KeccakF1600
lm${g} $inp,$bsz,$frame+3*$SIZE_T($sp)
j .Loop_absorb
.align 16
.Ldone_absorb:
lghi @D[0],-1 # no 'not' instruction :-(
lghi @D[1],-1
lghi @D[2],-1
lghi @D[3],-1
lghi @D[4],-1
lghi @T[0],-1
xg @D[0],$A[0][1]($src)
xg @D[1],$A[0][2]($src)
xg @D[2],$A[1][3]($src)
xg @D[3],$A[2][2]($src)
xg @D[4],$A[3][2]($src)
xg @T[0],$A[4][0]($src)
stmg @D[0],@D[1],$A[0][1]($src)
stg @D[2],$A[1][3]($src)
stg @D[3],$A[2][2]($src)
stg @D[4],$A[3][2]($src)
stg @T[0],$A[4][0]($src)
lgr %r2,$len # return value
lm${g} %r6,%r15,$frame+6*$SIZE_T($sp)
br %r14
.size SHA3_absorb,.-SHA3_absorb
___
}
{ my ($A_flat,$out,$len,$bsz) = map("%r$_",(2..5));
$code.=<<___;
.globl SHA3_squeeze
.type SHA3_squeeze,\@function
.align 32
SHA3_squeeze:
srl${g} $bsz,3
st${g} %r14,2*$SIZE_T($sp)
lghi %r14,8
st${g} $bsz,5*$SIZE_T($sp)
la %r1,0($A_flat)
j .Loop_squeeze
.align 16
.Loop_squeeze:
cl${g}r $len,%r14
jl .Ltail_squeeze
lrvg %r0,0(%r1)
la %r1,8(%r1)
stg %r0,0($out)
la $out,8($out)
a${g}hi $len,-8 # len -= 8
jz .Ldone_squeeze
brct $bsz,.Loop_squeeze # bsz--
stm${g} $out,$len,3*$SIZE_T($sp)
bras %r14,.LKeccakF1600
lm${g} $out,$bsz,3*$SIZE_T($sp)
lghi %r14,8
la %r1,0($A_flat)
j .Loop_squeeze
.Ltail_squeeze:
lg %r0,0(%r1)
.Loop_tail_squeeze:
stc %r0,0($out)
la $out,1($out)
srlg %r0,8
brct $len,.Loop_tail_squeeze
.Ldone_squeeze:
l${g} %r14,2*$SIZE_T($sp)
br %r14
.size SHA3_squeeze,.-SHA3_squeeze
___
}
$code.=<<___;
.align 256
.quad 0,0,0,0,0,0,0,0
.type iotas,\@object
iotas:
.quad 0x0000000000000001
.quad 0x0000000000008082
.quad 0x800000000000808a
.quad 0x8000000080008000
.quad 0x000000000000808b
.quad 0x0000000080000001
.quad 0x8000000080008081
.quad 0x8000000000008009
.quad 0x000000000000008a
.quad 0x0000000000000088
.quad 0x0000000080008009
.quad 0x000000008000000a
.quad 0x000000008000808b
.quad 0x800000000000008b
.quad 0x8000000000008089
.quad 0x8000000000008003
.quad 0x8000000000008002
.quad 0x8000000000000080
.quad 0x000000000000800a
.quad 0x800000008000000a
.quad 0x8000000080008081
.quad 0x8000000000008080
.quad 0x0000000080000001
.quad 0x8000000080008008
.size iotas,.-iotas
.asciz "Keccak-1600 absorb and squeeze for s390x, CRYPTOGAMS by <appro\@openssl.org>"
___
# unlike 32-bit shift 64-bit one takes three arguments
$code =~ s/(srlg\s+)(%r[0-9]+),/$1$2,$2,/gm;
print $code;
close STDOUT or die "error closing STDOUT: $!";
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