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arm64cpuid.pl
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#! /usr/bin/env perl
# Copyright 2015-2018 The OpenSSL Project Authors. All Rights Reserved.
#
# Licensed under the OpenSSL license (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
$flavour = shift;
$output = shift;
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
( $xlate="${dir}perlasm/arm-xlate.pl" and -f $xlate) or
die "can't locate arm-xlate.pl";
open OUT,"| \"$^X\" $xlate $flavour $output";
*STDOUT=*OUT;
$code.=<<___;
#include "arm_arch.h"
.text
.arch armv8-a+crypto
.align 5
.globl _armv7_neon_probe
.type _armv7_neon_probe,%function
_armv7_neon_probe:
orr v15.16b, v15.16b, v15.16b
ret
.size _armv7_neon_probe,.-_armv7_neon_probe
.globl _armv7_tick
.type _armv7_tick,%function
_armv7_tick:
#ifdef __APPLE__
mrs x0, CNTPCT_EL0
#else
mrs x0, CNTVCT_EL0
#endif
ret
.size _armv7_tick,.-_armv7_tick
.globl _armv8_aes_probe
.type _armv8_aes_probe,%function
_armv8_aes_probe:
aese v0.16b, v0.16b
ret
.size _armv8_aes_probe,.-_armv8_aes_probe
.globl _armv8_sha1_probe
.type _armv8_sha1_probe,%function
_armv8_sha1_probe:
sha1h s0, s0
ret
.size _armv8_sha1_probe,.-_armv8_sha1_probe
.globl _armv8_sha256_probe
.type _armv8_sha256_probe,%function
_armv8_sha256_probe:
sha256su0 v0.4s, v0.4s
ret
.size _armv8_sha256_probe,.-_armv8_sha256_probe
.globl _armv8_pmull_probe
.type _armv8_pmull_probe,%function
_armv8_pmull_probe:
pmull v0.1q, v0.1d, v0.1d
ret
.size _armv8_pmull_probe,.-_armv8_pmull_probe
.globl _armv8_sha512_probe
.type _armv8_sha512_probe,%function
_armv8_sha512_probe:
.long 0xcec08000 // sha512su0 v0.2d,v0.2d
ret
.size _armv8_sha512_probe,.-_armv8_sha512_probe
.globl OPENSSL_cleanse
.type OPENSSL_cleanse,%function
.align 5
OPENSSL_cleanse:
cbz x1,.Lret // len==0?
cmp x1,#15
b.hi .Lot // len>15
nop
.Little:
strb wzr,[x0],#1 // store byte-by-byte
subs x1,x1,#1
b.ne .Little
.Lret: ret
.align 4
.Lot: tst x0,#7
b.eq .Laligned // inp is aligned
strb wzr,[x0],#1 // store byte-by-byte
sub x1,x1,#1
b .Lot
.align 4
.Laligned:
str xzr,[x0],#8 // store word-by-word
sub x1,x1,#8
tst x1,#-8
b.ne .Laligned // len>=8
cbnz x1,.Little // len!=0?
ret
.size OPENSSL_cleanse,.-OPENSSL_cleanse
.globl CRYPTO_memcmp
.type CRYPTO_memcmp,%function
.align 4
CRYPTO_memcmp:
eor w3,w3,w3
cbz x2,.Lno_data // len==0?
cmp x2,#16
b.ne .Loop_cmp
ldp x8,x9,[x0]
ldp x10,x11,[x1]
eor x8,x8,x10
eor x9,x9,x11
orr x8,x8,x9
mov x0,#1
cmp x8,#0
csel x0,xzr,x0,eq
ret
.align 4
.Loop_cmp:
ldrb w4,[x0],#1
ldrb w5,[x1],#1
eor w4,w4,w5
orr w3,w3,w4
subs x2,x2,#1
b.ne .Loop_cmp
.Lno_data:
neg w0,w3
lsr w0,w0,#31
ret
.size CRYPTO_memcmp,.-CRYPTO_memcmp
___
print $code;
close STDOUT;