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Merge pull request #1656 from briansmith/b/merge-boringssl-14
Merge BoringSSL through 7b9b9ba
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#!/usr/bin/env perl | ||
# Copyright (c) 2023, Google Inc. | ||
# | ||
# Permission to use, copy, modify, and/or distribute this software for any | ||
# purpose with or without fee is hereby granted, provided that the above | ||
# copyright notice and this permission notice appear in all copies. | ||
# | ||
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | ||
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | ||
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY | ||
# SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | ||
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION | ||
# OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN | ||
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | ||
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use strict; | ||
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my $flavour = shift; | ||
my $output = shift; | ||
if ($flavour =~ /\./) { $output = $flavour; undef $flavour; } | ||
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$0 =~ m/(.*[\/\\])[^\/\\]+$/; | ||
my $dir = $1; | ||
my $xlate; | ||
( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or | ||
( $xlate="${dir}../../../perlasm/arm-xlate.pl" and -f $xlate) or | ||
die "can't locate arm-xlate.pl"; | ||
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open OUT, "| \"$^X\" \"$xlate\" $flavour \"$output\""; | ||
*STDOUT = *OUT; | ||
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my ($rp, $ap, $bp, $num) = ("x0", "x1", "x2", "x3"); | ||
my ($a0, $a1, $b0, $b1, $num_pairs) = ("x4", "x5", "x6", "x7", "x8"); | ||
my $code = <<____; | ||
#include <ring-core/arm_arch.h> | ||
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.text | ||
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// BN_ULONG bn_add_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, | ||
// size_t num); | ||
.type bn_add_words, %function | ||
.globl bn_add_words | ||
.align 4 | ||
bn_add_words: | ||
AARCH64_VALID_CALL_TARGET | ||
# Clear the carry flag. | ||
cmn xzr, xzr | ||
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# aarch64 can load two registers at a time, so we do two loop iterations at | ||
# at a time. Split $num = 2 * $num_pairs + $num. This allows loop | ||
# operations to use CBNZ without clobbering the carry flag. | ||
lsr $num_pairs, $num, #1 | ||
and $num, $num, #1 | ||
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cbz $num_pairs, .Ladd_tail | ||
.Ladd_loop: | ||
ldp $a0, $a1, [$ap], #16 | ||
ldp $b0, $b1, [$bp], #16 | ||
sub $num_pairs, $num_pairs, #1 | ||
adcs $a0, $a0, $b0 | ||
adcs $a1, $a1, $b1 | ||
stp $a0, $a1, [$rp], #16 | ||
cbnz $num_pairs, .Ladd_loop | ||
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.Ladd_tail: | ||
cbz $num, .Ladd_exit | ||
ldr $a0, [$ap], #8 | ||
ldr $b0, [$bp], #8 | ||
adcs $a0, $a0, $b0 | ||
str $a0, [$rp], #8 | ||
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.Ladd_exit: | ||
cset x0, cs | ||
ret | ||
.size bn_add_words,.-bn_add_words | ||
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// BN_ULONG bn_sub_words(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, | ||
// size_t num); | ||
.type bn_sub_words, %function | ||
.globl bn_sub_words | ||
.align 4 | ||
bn_sub_words: | ||
AARCH64_VALID_CALL_TARGET | ||
# Set the carry flag. Arm's borrow bit is flipped from the carry flag, | ||
# so we want C = 1 here. | ||
cmp xzr, xzr | ||
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# aarch64 can load two registers at a time, so we do two loop iterations at | ||
# at a time. Split $num = 2 * $num_pairs + $num. This allows loop | ||
# operations to use CBNZ without clobbering the carry flag. | ||
lsr $num_pairs, $num, #1 | ||
and $num, $num, #1 | ||
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cbz $num_pairs, .Lsub_tail | ||
.Lsub_loop: | ||
ldp $a0, $a1, [$ap], #16 | ||
ldp $b0, $b1, [$bp], #16 | ||
sub $num_pairs, $num_pairs, #1 | ||
sbcs $a0, $a0, $b0 | ||
sbcs $a1, $a1, $b1 | ||
stp $a0, $a1, [$rp], #16 | ||
cbnz $num_pairs, .Lsub_loop | ||
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.Lsub_tail: | ||
cbz $num, .Lsub_exit | ||
ldr $a0, [$ap], #8 | ||
ldr $b0, [$bp], #8 | ||
sbcs $a0, $a0, $b0 | ||
str $a0, [$rp], #8 | ||
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.Lsub_exit: | ||
cset x0, cc | ||
ret | ||
size bn_sub_words,.-bn_sub_words | ||
____ | ||
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print $code; | ||
close STDOUT or die "error closing STDOUT: $!"; |
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