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#! /usr/bin/env perl
# Copyright 2022 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
# $output is the last argument if it looks like a file (it has an extension)
# $flavour is the first argument if it doesn't look like a file
($zero,$ra,$tp,$sp)=map("\$r$_",(0..3));
($a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7)=map("\$r$_",(4..11));
($t0,$t1,$t2,$t3,$t4,$t5,$t6,$t7,$t8,$t9)=map("\$r$_",(12..21));
($s0,$s1,$s2,$s3,$s4,$s5,$s6,$s7)=map("\$r$_",(23..30));
($vr0,$vr1,$vr2,$vr3,$vr4,$vr5,$vr6,$vr7,$vr8,$vr9,$vr10,$vr11,$vr12,$vr13,$vr14,$vr15,$vr16,$vr17,$vr18,$vr19)=map("\$vr$_",(0..19));
($fp)=map("\$r$_",(22));
for (@ARGV) { $output=$_ if (/\w[\w\-]*\.\w+$/); }
open STDOUT,">$output";
while (($output=shift) && ($output!~/\w[\w\-]*\.\w+$/)) {}
open STDOUT,">$output";
{
my ($in_a,$in_b,$len,$m,$temp1,$temp2) = ($a0,$a1,$a2,$t0,$t1,$t2);
$code.=<<___;
################################################################################
# int CRYPTO_memcmp(const void * in_a, const void * in_b, size_t len)
################################################################################
.text
.balign 16
.globl CRYPTO_memcmp
.type CRYPTO_memcmp,\@function
CRYPTO_memcmp:
li.d $m,0
beqz $len,2f # len == 0
1:
ld.bu $temp1,$in_a,0
ld.bu $temp2,$in_b,0
addi.d $in_a,$in_a,1
addi.d $in_b,$in_b,1
addi.d $len,$len,-1
xor $temp1,$temp1,$temp2
or $m,$m,$temp1
blt $zero,$len,1b
2:
move $a0,$m
jr $ra
___
}
{
my ($ptr,$len,$temp1,$temp2) = ($a0,$a1,$t0,$t1);
$code.=<<___;
################################################################################
# void OPENSSL_cleanse(void *ptr, size_t len)
################################################################################
.text
.balign 16
.globl OPENSSL_cleanse
.type OPENSSL_cleanse,\@function
OPENSSL_cleanse:
beqz $len,2f # len == 0, return
srli.d $temp1,$len,4
bnez $temp1,3f # len > 15
1: # Store <= 15 individual bytes
st.b $zero,$ptr,0
addi.d $ptr,$ptr,1
addi.d $len,$len,-1
bnez $len,1b
2:
jr $ra
3: # Store individual bytes until we are aligned
andi $temp1,$ptr,0x7
beqz $temp1,4f
st.b $zero,$ptr,0
addi.d $ptr,$ptr,1
addi.d $len,$len,-1
b 3b
4: # Store aligned dwords
li.d $temp2,8
4:
st.d $zero,$ptr,0
addi.d $ptr,$ptr,8
addi.d $len,$len,-8
bge $len,$temp2,4b # if len>=8 loop
bnez $len,1b # if len<8 and len != 0, store remaining bytes
jr $ra
___
}
{
$code.=<<___;
################################################################################
# uint32_t OPENSSL_rdtsc(void)
################################################################################
.text
.balign 16
.globl OPENSSL_rdtsc
.type OPENSSL_rdtsc,\@function
OPENSSL_rdtsc:
move $a0,$zero
jr $ra
___
}
$code =~ s/\`([^\`]*)\`/eval($1)/gem;
print $code;
close STDOUT or die "error closing STDOUT: $!";
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