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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 MIPS.
# Performance improvement is 30% on unaligned input. The "secret" is
# to deploy lwl/lwr pair to load unaligned input. One could have
# vectorized Xupdate on MIPSIII/IV, but the goal was to code MIPS32-
# compatible subroutine. There is room for minor optimization on
# little-endian platforms...
# September 2012.
#
# Add MIPS32r2 code (>25% less instructions).
######################################################################
# There is a number of MIPS ABI in use, O32 and N32/64 are most
# widely used. Then there is a new contender: NUBI. It appears that if
# one picks the latter, it's possible to arrange code in ABI neutral
# manner. Therefore let's stick to NUBI register layout:
#
($zero,$at,$t0,$t1,$t2)=map("\$$_",(0..2,24,25));
($a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7)=map("\$$_",(4..11));
($s0,$s1,$s2,$s3,$s4,$s5,$s6,$s7,$s8,$s9,$s10,$s11)=map("\$$_",(12..23));
($gp,$tp,$sp,$fp,$ra)=map("\$$_",(3,28..31));
#
# The return value is placed in $a0. Following coding rules facilitate
# interoperability:
#
# - never ever touch $tp, "thread pointer", former $gp;
# - copy return value to $t0, former $v0 [or to $a0 if you're adapting
# old code];
# - on O32 populate $a4-$a7 with 'lw $aN,4*N($sp)' if necessary;
#
# For reference here is register layout for N32/64 MIPS ABIs:
#
# ($zero,$at,$v0,$v1)=map("\$$_",(0..3));
# ($a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7)=map("\$$_",(4..11));
# ($t0,$t1,$t2,$t3,$t8,$t9)=map("\$$_",(12..15,24,25));
# ($s0,$s1,$s2,$s3,$s4,$s5,$s6,$s7)=map("\$$_",(16..23));
# ($gp,$sp,$fp,$ra)=map("\$$_",(28..31));
# $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;
# supported flavours are o32,n32,64,nubi32,nubi64, default is o32
$flavour = $#ARGV >= 0 && $ARGV[0] !~ m|\.| ? shift : "o32";
if ($flavour =~ /64|n32/i) {
$PTR_ADD="daddu"; # incidentally works even on n32
$PTR_SUB="dsubu"; # incidentally works even on n32
$REG_S="sd";
$REG_L="ld";
$PTR_SLL="dsll"; # incidentally works even on n32
$SZREG=8;
} else {
$PTR_ADD="addu";
$PTR_SUB="subu";
$REG_S="sw";
$REG_L="lw";
$PTR_SLL="sll";
$SZREG=4;
}
#
# <appro@openssl.org>
#
######################################################################
$big_endian=(`echo MIPSEB | $ENV{CC} -E -`=~/MIPSEB/)?0:1 if ($ENV{CC});
$output and open STDOUT,">$output";
if (!defined($big_endian))
{ $big_endian=(unpack('L',pack('N',1))==1); }
# offsets of the Most and Least Significant Bytes
$MSB=$big_endian?0:3;
$LSB=3&~$MSB;
@X=map("\$$_",(8..23)); # a4-a7,s0-s11
$ctx=$a0;
$inp=$a1;
$num=$a2;
$A="\$1";
$B="\$2";
$C="\$3";
$D="\$7";
$E="\$24"; @V=($A,$B,$C,$D,$E);
$t0="\$25";
$t1=$num; # $num is offloaded to stack
$t2="\$30"; # fp
$K="\$31"; # ra
sub BODY_00_14 {
my ($i,$a,$b,$c,$d,$e)=@_;
my $j=$i+1;
$code.=<<___ if (!$big_endian);
#if defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2)
wsbh @X[$i],@X[$i] # byte swap($i)
rotr @X[$i],@X[$i],16
#else
srl $t0,@X[$i],24 # byte swap($i)
srl $t1,@X[$i],8
andi $t2,@X[$i],0xFF00
sll @X[$i],@X[$i],24
andi $t1,0xFF00
sll $t2,$t2,8
or @X[$i],$t0
or $t1,$t2
or @X[$i],$t1
#endif
___
$code.=<<___;
#if defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2)
addu $e,$K # $i
xor $t0,$c,$d
rotr $t1,$a,27
and $t0,$b
addu $e,$t1
#if defined(_MIPS_ARCH_MIPS32R6) || defined(_MIPS_ARCH_MIPS64R6)
lw @X[$j],$j*4($inp)
#else
lwl @X[$j],$j*4+$MSB($inp)
lwr @X[$j],$j*4+$LSB($inp)
#endif
xor $t0,$d
addu $e,@X[$i]
rotr $b,$b,2
addu $e,$t0
#else
lwl @X[$j],$j*4+$MSB($inp)
sll $t0,$a,5 # $i
addu $e,$K
lwr @X[$j],$j*4+$LSB($inp)
srl $t1,$a,27
addu $e,$t0
xor $t0,$c,$d
addu $e,$t1
sll $t2,$b,30
and $t0,$b
srl $b,$b,2
xor $t0,$d
addu $e,@X[$i]
or $b,$t2
addu $e,$t0
#endif
___
}
sub BODY_15_19 {
my ($i,$a,$b,$c,$d,$e)=@_;
my $j=$i+1;
$code.=<<___ if (!$big_endian && $i==15);
#if defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2)
wsbh @X[$i],@X[$i] # byte swap($i)
rotr @X[$i],@X[$i],16
#else
srl $t0,@X[$i],24 # byte swap($i)
srl $t1,@X[$i],8
andi $t2,@X[$i],0xFF00
sll @X[$i],@X[$i],24
andi $t1,0xFF00
sll $t2,$t2,8
or @X[$i],$t0
or @X[$i],$t1
or @X[$i],$t2
#endif
___
$code.=<<___;
#if defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2)
addu $e,$K # $i
xor @X[$j%16],@X[($j+2)%16]
xor $t0,$c,$d
rotr $t1,$a,27
xor @X[$j%16],@X[($j+8)%16]
and $t0,$b
addu $e,$t1
xor @X[$j%16],@X[($j+13)%16]
xor $t0,$d
addu $e,@X[$i%16]
rotr @X[$j%16],@X[$j%16],31
rotr $b,$b,2
addu $e,$t0
#else
xor @X[$j%16],@X[($j+2)%16]
sll $t0,$a,5 # $i
addu $e,$K
srl $t1,$a,27
addu $e,$t0
xor @X[$j%16],@X[($j+8)%16]
xor $t0,$c,$d
addu $e,$t1
xor @X[$j%16],@X[($j+13)%16]
sll $t2,$b,30
and $t0,$b
srl $t1,@X[$j%16],31
addu @X[$j%16],@X[$j%16]
srl $b,$b,2
xor $t0,$d
or @X[$j%16],$t1
addu $e,@X[$i%16]
or $b,$t2
addu $e,$t0
#endif
___
}
sub BODY_20_39 {
my ($i,$a,$b,$c,$d,$e)=@_;
my $j=$i+1;
$code.=<<___ if ($i<79);
#if defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2)
xor @X[$j%16],@X[($j+2)%16]
addu $e,$K # $i
rotr $t1,$a,27
xor @X[$j%16],@X[($j+8)%16]
xor $t0,$c,$d
addu $e,$t1
xor @X[$j%16],@X[($j+13)%16]
xor $t0,$b
addu $e,@X[$i%16]
rotr @X[$j%16],@X[$j%16],31
rotr $b,$b,2
addu $e,$t0
#else
xor @X[$j%16],@X[($j+2)%16]
sll $t0,$a,5 # $i
addu $e,$K
srl $t1,$a,27
addu $e,$t0
xor @X[$j%16],@X[($j+8)%16]
xor $t0,$c,$d
addu $e,$t1
xor @X[$j%16],@X[($j+13)%16]
sll $t2,$b,30
xor $t0,$b
srl $t1,@X[$j%16],31
addu @X[$j%16],@X[$j%16]
srl $b,$b,2
addu $e,@X[$i%16]
or @X[$j%16],$t1
or $b,$t2
addu $e,$t0
#endif
___
$code.=<<___ if ($i==79);
#if defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2)
lw @X[0],0($ctx)
addu $e,$K # $i
lw @X[1],4($ctx)
rotr $t1,$a,27
lw @X[2],8($ctx)
xor $t0,$c,$d
addu $e,$t1
lw @X[3],12($ctx)
xor $t0,$b
addu $e,@X[$i%16]
lw @X[4],16($ctx)
rotr $b,$b,2
addu $e,$t0
#else
lw @X[0],0($ctx)
sll $t0,$a,5 # $i
addu $e,$K
lw @X[1],4($ctx)
srl $t1,$a,27
addu $e,$t0
lw @X[2],8($ctx)
xor $t0,$c,$d
addu $e,$t1
lw @X[3],12($ctx)
sll $t2,$b,30
xor $t0,$b
lw @X[4],16($ctx)
srl $b,$b,2
addu $e,@X[$i%16]
or $b,$t2
addu $e,$t0
#endif
___
}
sub BODY_40_59 {
my ($i,$a,$b,$c,$d,$e)=@_;
my $j=$i+1;
$code.=<<___ if ($i<79);
#if defined(_MIPS_ARCH_MIPS32R2) || defined(_MIPS_ARCH_MIPS64R2)
addu $e,$K # $i
and $t0,$c,$d
xor @X[$j%16],@X[($j+2)%16]
rotr $t1,$a,27
addu $e,$t0
xor @X[$j%16],@X[($j+8)%16]
xor $t0,$c,$d
addu $e,$t1
xor @X[$j%16],@X[($j+13)%16]
and $t0,$b
addu $e,@X[$i%16]
rotr @X[$j%16],@X[$j%16],31
rotr $b,$b,2
addu $e,$t0
#else
xor @X[$j%16],@X[($j+2)%16]
sll $t0,$a,5 # $i
addu $e,$K
srl $t1,$a,27
addu $e,$t0
xor @X[$j%16],@X[($j+8)%16]
and $t0,$c,$d
addu $e,$t1
xor @X[$j%16],@X[($j+13)%16]
sll $t2,$b,30
addu $e,$t0
srl $t1,@X[$j%16],31
xor $t0,$c,$d
addu @X[$j%16],@X[$j%16]
and $t0,$b
srl $b,$b,2
or @X[$j%16],$t1
addu $e,@X[$i%16]
or $b,$t2
addu $e,$t0
#endif
___
}
$FRAMESIZE=16; # large enough to accommodate NUBI saved registers
$SAVED_REGS_MASK = ($flavour =~ /nubi/i) ? "0xc0fff008" : "0xc0ff0000";
$code=<<___;
#include "mips_arch.h"
.text
.set noat
.set noreorder
.align 5
.globl sha1_block_data_order
.ent sha1_block_data_order
sha1_block_data_order:
.frame $sp,$FRAMESIZE*$SZREG,$ra
.mask $SAVED_REGS_MASK,-$SZREG
.set noreorder
$PTR_SUB $sp,$FRAMESIZE*$SZREG
$REG_S $ra,($FRAMESIZE-1)*$SZREG($sp)
$REG_S $fp,($FRAMESIZE-2)*$SZREG($sp)
$REG_S $s11,($FRAMESIZE-3)*$SZREG($sp)
$REG_S $s10,($FRAMESIZE-4)*$SZREG($sp)
$REG_S $s9,($FRAMESIZE-5)*$SZREG($sp)
$REG_S $s8,($FRAMESIZE-6)*$SZREG($sp)
$REG_S $s7,($FRAMESIZE-7)*$SZREG($sp)
$REG_S $s6,($FRAMESIZE-8)*$SZREG($sp)
$REG_S $s5,($FRAMESIZE-9)*$SZREG($sp)
$REG_S $s4,($FRAMESIZE-10)*$SZREG($sp)
___
$code.=<<___ if ($flavour =~ /nubi/i); # optimize non-nubi prologue
$REG_S $s3,($FRAMESIZE-11)*$SZREG($sp)
$REG_S $s2,($FRAMESIZE-12)*$SZREG($sp)
$REG_S $s1,($FRAMESIZE-13)*$SZREG($sp)
$REG_S $s0,($FRAMESIZE-14)*$SZREG($sp)
$REG_S $gp,($FRAMESIZE-15)*$SZREG($sp)
___
$code.=<<___;
$PTR_SLL $num,6
$PTR_ADD $num,$inp
$REG_S $num,0($sp)
lw $A,0($ctx)
lw $B,4($ctx)
lw $C,8($ctx)
lw $D,12($ctx)
b .Loop
lw $E,16($ctx)
.align 4
.Loop:
.set reorder
#if defined(_MIPS_ARCH_MIPS32R6) || defined(_MIPS_ARCH_MIPS64R6)
lui $K,0x5a82
lw @X[0],($inp)
ori $K,0x7999 # K_00_19
#else
lwl @X[0],$MSB($inp)
lui $K,0x5a82
lwr @X[0],$LSB($inp)
ori $K,0x7999 # K_00_19
#endif
___
for ($i=0;$i<15;$i++) { &BODY_00_14($i,@V); unshift(@V,pop(@V)); }
for (;$i<20;$i++) { &BODY_15_19($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
lui $K,0x6ed9
ori $K,0xeba1 # K_20_39
___
for (;$i<40;$i++) { &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
lui $K,0x8f1b
ori $K,0xbcdc # K_40_59
___
for (;$i<60;$i++) { &BODY_40_59($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
lui $K,0xca62
ori $K,0xc1d6 # K_60_79
___
for (;$i<80;$i++) { &BODY_20_39($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
$PTR_ADD $inp,64
$REG_L $num,0($sp)
addu $A,$X[0]
addu $B,$X[1]
sw $A,0($ctx)
addu $C,$X[2]
addu $D,$X[3]
sw $B,4($ctx)
addu $E,$X[4]
sw $C,8($ctx)
sw $D,12($ctx)
sw $E,16($ctx)
.set noreorder
bne $inp,$num,.Loop
nop
.set noreorder
$REG_L $ra,($FRAMESIZE-1)*$SZREG($sp)
$REG_L $fp,($FRAMESIZE-2)*$SZREG($sp)
$REG_L $s11,($FRAMESIZE-3)*$SZREG($sp)
$REG_L $s10,($FRAMESIZE-4)*$SZREG($sp)
$REG_L $s9,($FRAMESIZE-5)*$SZREG($sp)
$REG_L $s8,($FRAMESIZE-6)*$SZREG($sp)
$REG_L $s7,($FRAMESIZE-7)*$SZREG($sp)
$REG_L $s6,($FRAMESIZE-8)*$SZREG($sp)
$REG_L $s5,($FRAMESIZE-9)*$SZREG($sp)
$REG_L $s4,($FRAMESIZE-10)*$SZREG($sp)
___
$code.=<<___ if ($flavour =~ /nubi/i);
$REG_L $s3,($FRAMESIZE-11)*$SZREG($sp)
$REG_L $s2,($FRAMESIZE-12)*$SZREG($sp)
$REG_L $s1,($FRAMESIZE-13)*$SZREG($sp)
$REG_L $s0,($FRAMESIZE-14)*$SZREG($sp)
$REG_L $gp,($FRAMESIZE-15)*$SZREG($sp)
___
$code.=<<___;
jr $ra
$PTR_ADD $sp,$FRAMESIZE*$SZREG
.end sha1_block_data_order
.rdata
.asciiz "SHA1 for MIPS, CRYPTOGAMS by <appro\@openssl.org>"
___
print $code;
close STDOUT or die "error closing STDOUT: $!";
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