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#! /usr/bin/env perl
# Copyright 2016-2022 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
#
# ====================================================================
# 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/.
# ====================================================================
#
# June 2015
#
# ChaCha20 for ARMv8.
#
# April 2019
#
# Replace 3xNEON+1xIALU code path with 4+1. 4+1 is actually fastest
# option on most(*), but not all, processors, yet 6+2 is retained.
# This is because penalties are considered tolerable in comparison to
# improvement on processors where 6+2 helps. Most notably +37% on
# ThunderX2. It's server-oriented processor which will have to serve
# as many requests as possible. While others are mostly clients, when
# performance doesn't have to be absolute top-notch, just fast enough,
# as majority of time is spent "entertaining" relatively slow human.
#
# Performance in cycles per byte out of large buffer.
#
# IALU/gcc-4.9 4xNEON+1xIALU 6xNEON+2xIALU
#
# Apple A7 5.50/+49% 2.72 1.60
# Cortex-A53 8.40/+80% 4.06 4.45(*)
# Cortex-A57 8.06/+43% 4.15 4.40(*)
# Denver 4.50/+82% 2.30 2.70(*)
# X-Gene 9.50/+46% 8.20 8.90(*)
# Mongoose 8.00/+44% 2.74 3.12(*)
# Kryo 8.17/+50% 4.47 4.65(*)
# ThunderX2 7.22/+48% 5.64 4.10
#
# (*) slower than 4+1:-(
# $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;
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $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\""
or die "can't call $xlate: $!";
*STDOUT=*OUT;
sub AUTOLOAD() # thunk [simplified] x86-style perlasm
{ my $opcode = $AUTOLOAD; $opcode =~ s/.*:://; $opcode =~ s/_/\./;
my $arg = pop;
$arg = "#$arg" if ($arg*1 eq $arg);
$code .= "\t$opcode\t".join(',',@_,$arg)."\n";
}
my ($out,$inp,$len,$key,$ctr) = map("x$_",(0..4));
my @x=map("x$_",(5..17,19..21));
my @d=map("x$_",(22..28,30));
sub ROUND {
my ($a0,$b0,$c0,$d0)=@_;
my ($a1,$b1,$c1,$d1)=map(($_&~3)+(($_+1)&3),($a0,$b0,$c0,$d0));
my ($a2,$b2,$c2,$d2)=map(($_&~3)+(($_+1)&3),($a1,$b1,$c1,$d1));
my ($a3,$b3,$c3,$d3)=map(($_&~3)+(($_+1)&3),($a2,$b2,$c2,$d2));
(
"&add_32 (@x[$a0],@x[$a0],@x[$b0])",
"&add_32 (@x[$a1],@x[$a1],@x[$b1])",
"&add_32 (@x[$a2],@x[$a2],@x[$b2])",
"&add_32 (@x[$a3],@x[$a3],@x[$b3])",
"&eor_32 (@x[$d0],@x[$d0],@x[$a0])",
"&eor_32 (@x[$d1],@x[$d1],@x[$a1])",
"&eor_32 (@x[$d2],@x[$d2],@x[$a2])",
"&eor_32 (@x[$d3],@x[$d3],@x[$a3])",
"&ror_32 (@x[$d0],@x[$d0],16)",
"&ror_32 (@x[$d1],@x[$d1],16)",
"&ror_32 (@x[$d2],@x[$d2],16)",
"&ror_32 (@x[$d3],@x[$d3],16)",
"&add_32 (@x[$c0],@x[$c0],@x[$d0])",
"&add_32 (@x[$c1],@x[$c1],@x[$d1])",
"&add_32 (@x[$c2],@x[$c2],@x[$d2])",
"&add_32 (@x[$c3],@x[$c3],@x[$d3])",
"&eor_32 (@x[$b0],@x[$b0],@x[$c0])",
"&eor_32 (@x[$b1],@x[$b1],@x[$c1])",
"&eor_32 (@x[$b2],@x[$b2],@x[$c2])",
"&eor_32 (@x[$b3],@x[$b3],@x[$c3])",
"&ror_32 (@x[$b0],@x[$b0],20)",
"&ror_32 (@x[$b1],@x[$b1],20)",
"&ror_32 (@x[$b2],@x[$b2],20)",
"&ror_32 (@x[$b3],@x[$b3],20)",
"&add_32 (@x[$a0],@x[$a0],@x[$b0])",
"&add_32 (@x[$a1],@x[$a1],@x[$b1])",
"&add_32 (@x[$a2],@x[$a2],@x[$b2])",
"&add_32 (@x[$a3],@x[$a3],@x[$b3])",
"&eor_32 (@x[$d0],@x[$d0],@x[$a0])",
"&eor_32 (@x[$d1],@x[$d1],@x[$a1])",
"&eor_32 (@x[$d2],@x[$d2],@x[$a2])",
"&eor_32 (@x[$d3],@x[$d3],@x[$a3])",
"&ror_32 (@x[$d0],@x[$d0],24)",
"&ror_32 (@x[$d1],@x[$d1],24)",
"&ror_32 (@x[$d2],@x[$d2],24)",
"&ror_32 (@x[$d3],@x[$d3],24)",
"&add_32 (@x[$c0],@x[$c0],@x[$d0])",
"&add_32 (@x[$c1],@x[$c1],@x[$d1])",
"&add_32 (@x[$c2],@x[$c2],@x[$d2])",
"&add_32 (@x[$c3],@x[$c3],@x[$d3])",
"&eor_32 (@x[$b0],@x[$b0],@x[$c0])",
"&eor_32 (@x[$b1],@x[$b1],@x[$c1])",
"&eor_32 (@x[$b2],@x[$b2],@x[$c2])",
"&eor_32 (@x[$b3],@x[$b3],@x[$c3])",
"&ror_32 (@x[$b0],@x[$b0],25)",
"&ror_32 (@x[$b1],@x[$b1],25)",
"&ror_32 (@x[$b2],@x[$b2],25)",
"&ror_32 (@x[$b3],@x[$b3],25)"
);
}
$code.=<<___;
#include "arm_arch.h"
#ifndef __KERNEL__
.extern OPENSSL_armcap_P
.hidden OPENSSL_armcap_P
.extern ChaCha20_ctr32_sve
#endif
.text
.align 5
.Lsigma:
.quad 0x3320646e61707865,0x6b20657479622d32 // endian-neutral
.Lone:
.long 1,2,3,4
.Lrot24:
.long 0x02010003,0x06050407,0x0a09080b,0x0e0d0c0f
.asciz "ChaCha20 for ARMv8, CRYPTOGAMS by \@dot-asm"
.globl ChaCha20_ctr32_dflt
.type ChaCha20_ctr32_dflt,%function
.align 5
ChaCha20_ctr32_dflt:
AARCH64_SIGN_LINK_REGISTER
cmp $len,#192
b.lo .Lshort
#ifndef __KERNEL__
adrp x17,OPENSSL_armcap_P
ldr w17,[x17,#:lo12:OPENSSL_armcap_P]
.Lcheck_neon:
tst w17,#ARMV7_NEON
b.ne .LChaCha20_neon
#endif
.Lshort:
stp x29,x30,[sp,#-96]!
add x29,sp,#0
adr @x[0],.Lsigma
stp x19,x20,[sp,#16]
stp x21,x22,[sp,#32]
stp x23,x24,[sp,#48]
stp x25,x26,[sp,#64]
stp x27,x28,[sp,#80]
sub sp,sp,#64
ldp @d[0],@d[1],[@x[0]] // load sigma
ldp @d[2],@d[3],[$key] // load key
ldp @d[4],@d[5],[$key,#16]
ldp @d[6],@d[7],[$ctr] // load counter
#ifdef __AARCH64EB__
ror @d[2],@d[2],#32
ror @d[3],@d[3],#32
ror @d[4],@d[4],#32
ror @d[5],@d[5],#32
ror @d[6],@d[6],#32
ror @d[7],@d[7],#32
#endif
.Loop_outer:
mov.32 @x[0],@d[0] // unpack key block
lsr @x[1],@d[0],#32
mov.32 @x[2],@d[1]
lsr @x[3],@d[1],#32
mov.32 @x[4],@d[2]
lsr @x[5],@d[2],#32
mov.32 @x[6],@d[3]
lsr @x[7],@d[3],#32
mov.32 @x[8],@d[4]
lsr @x[9],@d[4],#32
mov.32 @x[10],@d[5]
lsr @x[11],@d[5],#32
mov.32 @x[12],@d[6]
lsr @x[13],@d[6],#32
mov.32 @x[14],@d[7]
lsr @x[15],@d[7],#32
mov $ctr,#10
subs $len,$len,#64
.Loop:
sub $ctr,$ctr,#1
___
foreach (&ROUND(0, 4, 8,12)) { eval; }
foreach (&ROUND(0, 5,10,15)) { eval; }
$code.=<<___;
cbnz $ctr,.Loop
add.32 @x[0],@x[0],@d[0] // accumulate key block
add @x[1],@x[1],@d[0],lsr#32
add.32 @x[2],@x[2],@d[1]
add @x[3],@x[3],@d[1],lsr#32
add.32 @x[4],@x[4],@d[2]
add @x[5],@x[5],@d[2],lsr#32
add.32 @x[6],@x[6],@d[3]
add @x[7],@x[7],@d[3],lsr#32
add.32 @x[8],@x[8],@d[4]
add @x[9],@x[9],@d[4],lsr#32
add.32 @x[10],@x[10],@d[5]
add @x[11],@x[11],@d[5],lsr#32
add.32 @x[12],@x[12],@d[6]
add @x[13],@x[13],@d[6],lsr#32
add.32 @x[14],@x[14],@d[7]
add @x[15],@x[15],@d[7],lsr#32
b.lo .Ltail
add @x[0],@x[0],@x[1],lsl#32 // pack
add @x[2],@x[2],@x[3],lsl#32
ldp @x[1],@x[3],[$inp,#0] // load input
add @x[4],@x[4],@x[5],lsl#32
add @x[6],@x[6],@x[7],lsl#32
ldp @x[5],@x[7],[$inp,#16]
add @x[8],@x[8],@x[9],lsl#32
add @x[10],@x[10],@x[11],lsl#32
ldp @x[9],@x[11],[$inp,#32]
add @x[12],@x[12],@x[13],lsl#32
add @x[14],@x[14],@x[15],lsl#32
ldp @x[13],@x[15],[$inp,#48]
add $inp,$inp,#64
#ifdef __AARCH64EB__
rev @x[0],@x[0]
rev @x[2],@x[2]
rev @x[4],@x[4]
rev @x[6],@x[6]
rev @x[8],@x[8]
rev @x[10],@x[10]
rev @x[12],@x[12]
rev @x[14],@x[14]
#endif
eor @x[0],@x[0],@x[1]
eor @x[2],@x[2],@x[3]
eor @x[4],@x[4],@x[5]
eor @x[6],@x[6],@x[7]
eor @x[8],@x[8],@x[9]
eor @x[10],@x[10],@x[11]
eor @x[12],@x[12],@x[13]
eor @x[14],@x[14],@x[15]
stp @x[0],@x[2],[$out,#0] // store output
add @d[6],@d[6],#1 // increment counter
stp @x[4],@x[6],[$out,#16]
stp @x[8],@x[10],[$out,#32]
stp @x[12],@x[14],[$out,#48]
add $out,$out,#64
b.hi .Loop_outer
ldp x19,x20,[x29,#16]
add sp,sp,#64
ldp x21,x22,[x29,#32]
ldp x23,x24,[x29,#48]
ldp x25,x26,[x29,#64]
ldp x27,x28,[x29,#80]
ldp x29,x30,[sp],#96
.Labort:
AARCH64_VALIDATE_LINK_REGISTER
ret
.align 4
.Ltail:
add $len,$len,#64
.Less_than_64:
sub $out,$out,#1
add $inp,$inp,$len
add $out,$out,$len
add $ctr,sp,$len
neg $len,$len
add @x[0],@x[0],@x[1],lsl#32 // pack
add @x[2],@x[2],@x[3],lsl#32
add @x[4],@x[4],@x[5],lsl#32
add @x[6],@x[6],@x[7],lsl#32
add @x[8],@x[8],@x[9],lsl#32
add @x[10],@x[10],@x[11],lsl#32
add @x[12],@x[12],@x[13],lsl#32
add @x[14],@x[14],@x[15],lsl#32
#ifdef __AARCH64EB__
rev @x[0],@x[0]
rev @x[2],@x[2]
rev @x[4],@x[4]
rev @x[6],@x[6]
rev @x[8],@x[8]
rev @x[10],@x[10]
rev @x[12],@x[12]
rev @x[14],@x[14]
#endif
stp @x[0],@x[2],[sp,#0]
stp @x[4],@x[6],[sp,#16]
stp @x[8],@x[10],[sp,#32]
stp @x[12],@x[14],[sp,#48]
.Loop_tail:
ldrb w10,[$inp,$len]
ldrb w11,[$ctr,$len]
add $len,$len,#1
eor w10,w10,w11
strb w10,[$out,$len]
cbnz $len,.Loop_tail
stp xzr,xzr,[sp,#0]
stp xzr,xzr,[sp,#16]
stp xzr,xzr,[sp,#32]
stp xzr,xzr,[sp,#48]
ldp x19,x20,[x29,#16]
add sp,sp,#64
ldp x21,x22,[x29,#32]
ldp x23,x24,[x29,#48]
ldp x25,x26,[x29,#64]
ldp x27,x28,[x29,#80]
ldp x29,x30,[sp],#96
AARCH64_VALIDATE_LINK_REGISTER
ret
.size ChaCha20_ctr32_dflt,.-ChaCha20_ctr32_dflt
.globl ChaCha20_ctr32
.type ChaCha20_ctr32,%function
.align 5
ChaCha20_ctr32:
AARCH64_SIGN_LINK_REGISTER
cbz $len,.Labort
cmp $len,#192
b.lo .Lshort
#ifndef __KERNEL__
adrp x17,OPENSSL_armcap_P
ldr w17,[x17,#:lo12:OPENSSL_armcap_P]
tst w17,#ARMV8_SVE
b.eq .Lcheck_neon
stp x29,x30,[sp,#-16]!
sub sp,sp,#16
// SVE handling will inevitably increment the counter
// Neon/Scalar code that follows to process tail data needs to
// use new counter, unfortunately the input counter buffer
// pointed to by ctr is meant to be read-only per API contract
// we have to copy the buffer to stack to be writable by SVE
ldp x5,x6,[$ctr]
stp x5,x6,[sp]
mov $ctr,sp
bl ChaCha20_ctr32_sve
cbz $len,1f
bl ChaCha20_ctr32_dflt
1:
add sp,sp,#16
ldp x29,x30,[sp],#16
AARCH64_VALIDATE_LINK_REGISTER
ret
#endif
b .Lshort
.size ChaCha20_ctr32,.-ChaCha20_ctr32
___
{{{
my @K = map("v$_.4s",(0..3));
my ($xt0,$xt1,$xt2,$xt3, $CTR,$ROT24) = map("v$_.4s",(4..9));
my @X = map("v$_.4s",(16,20,24,28, 17,21,25,29, 18,22,26,30, 19,23,27,31));
my ($xa0,$xa1,$xa2,$xa3, $xb0,$xb1,$xb2,$xb3,
$xc0,$xc1,$xc2,$xc3, $xd0,$xd1,$xd2,$xd3) = @X;
sub NEON_lane_ROUND {
my ($a0,$b0,$c0,$d0)=@_;
my ($a1,$b1,$c1,$d1)=map(($_&~3)+(($_+1)&3),($a0,$b0,$c0,$d0));
my ($a2,$b2,$c2,$d2)=map(($_&~3)+(($_+1)&3),($a1,$b1,$c1,$d1));
my ($a3,$b3,$c3,$d3)=map(($_&~3)+(($_+1)&3),($a2,$b2,$c2,$d2));
my @x=map("'$_'",@X);
(
"&add (@x[$a0],@x[$a0],@x[$b0])", # Q1
"&add (@x[$a1],@x[$a1],@x[$b1])", # Q2
"&add (@x[$a2],@x[$a2],@x[$b2])", # Q3
"&add (@x[$a3],@x[$a3],@x[$b3])", # Q4
"&eor (@x[$d0],@x[$d0],@x[$a0])",
"&eor (@x[$d1],@x[$d1],@x[$a1])",
"&eor (@x[$d2],@x[$d2],@x[$a2])",
"&eor (@x[$d3],@x[$d3],@x[$a3])",
"&rev32_16 (@x[$d0],@x[$d0])",
"&rev32_16 (@x[$d1],@x[$d1])",
"&rev32_16 (@x[$d2],@x[$d2])",
"&rev32_16 (@x[$d3],@x[$d3])",
"&add (@x[$c0],@x[$c0],@x[$d0])",
"&add (@x[$c1],@x[$c1],@x[$d1])",
"&add (@x[$c2],@x[$c2],@x[$d2])",
"&add (@x[$c3],@x[$c3],@x[$d3])",
"&eor ('$xt0',@x[$b0],@x[$c0])",
"&eor ('$xt1',@x[$b1],@x[$c1])",
"&eor ('$xt2',@x[$b2],@x[$c2])",
"&eor ('$xt3',@x[$b3],@x[$c3])",
"&ushr (@x[$b0],'$xt0',20)",
"&ushr (@x[$b1],'$xt1',20)",
"&ushr (@x[$b2],'$xt2',20)",
"&ushr (@x[$b3],'$xt3',20)",
"&sli (@x[$b0],'$xt0',12)",
"&sli (@x[$b1],'$xt1',12)",
"&sli (@x[$b2],'$xt2',12)",
"&sli (@x[$b3],'$xt3',12)",
"&add (@x[$a0],@x[$a0],@x[$b0])",
"&add (@x[$a1],@x[$a1],@x[$b1])",
"&add (@x[$a2],@x[$a2],@x[$b2])",
"&add (@x[$a3],@x[$a3],@x[$b3])",
"&eor ('$xt0',@x[$d0],@x[$a0])",
"&eor ('$xt1',@x[$d1],@x[$a1])",
"&eor ('$xt2',@x[$d2],@x[$a2])",
"&eor ('$xt3',@x[$d3],@x[$a3])",
"&tbl (@x[$d0],'{$xt0}','$ROT24')",
"&tbl (@x[$d1],'{$xt1}','$ROT24')",
"&tbl (@x[$d2],'{$xt2}','$ROT24')",
"&tbl (@x[$d3],'{$xt3}','$ROT24')",
"&add (@x[$c0],@x[$c0],@x[$d0])",
"&add (@x[$c1],@x[$c1],@x[$d1])",
"&add (@x[$c2],@x[$c2],@x[$d2])",
"&add (@x[$c3],@x[$c3],@x[$d3])",
"&eor ('$xt0',@x[$b0],@x[$c0])",
"&eor ('$xt1',@x[$b1],@x[$c1])",
"&eor ('$xt2',@x[$b2],@x[$c2])",
"&eor ('$xt3',@x[$b3],@x[$c3])",
"&ushr (@x[$b0],'$xt0',25)",
"&ushr (@x[$b1],'$xt1',25)",
"&ushr (@x[$b2],'$xt2',25)",
"&ushr (@x[$b3],'$xt3',25)",
"&sli (@x[$b0],'$xt0',7)",
"&sli (@x[$b1],'$xt1',7)",
"&sli (@x[$b2],'$xt2',7)",
"&sli (@x[$b3],'$xt3',7)"
);
}
$code.=<<___;
#ifdef __KERNEL__
.globl ChaCha20_neon
#endif
.type ChaCha20_neon,%function
.align 5
ChaCha20_neon:
AARCH64_SIGN_LINK_REGISTER
.LChaCha20_neon:
stp x29,x30,[sp,#-96]!
add x29,sp,#0
adr @x[0],.Lsigma
stp x19,x20,[sp,#16]
stp x21,x22,[sp,#32]
stp x23,x24,[sp,#48]
stp x25,x26,[sp,#64]
stp x27,x28,[sp,#80]
cmp $len,#512
b.hs .L512_or_more_neon
sub sp,sp,#64
ldp @d[0],@d[1],[@x[0]] // load sigma
ld1 {@K[0]},[@x[0]],#16
ldp @d[2],@d[3],[$key] // load key
ldp @d[4],@d[5],[$key,#16]
ld1 {@K[1],@K[2]},[$key]
ldp @d[6],@d[7],[$ctr] // load counter
ld1 {@K[3]},[$ctr]
stp d8,d9,[sp] // meet ABI requirements
ld1 {$CTR,$ROT24},[@x[0]]
#ifdef __AARCH64EB__
rev64 @K[0],@K[0]
ror @d[2],@d[2],#32
ror @d[3],@d[3],#32
ror @d[4],@d[4],#32
ror @d[5],@d[5],#32
ror @d[6],@d[6],#32
ror @d[7],@d[7],#32
#endif
.Loop_outer_neon:
dup $xa0,@{K[0]}[0] // unpack key block
mov.32 @x[0],@d[0]
dup $xa1,@{K[0]}[1]
lsr @x[1],@d[0],#32
dup $xa2,@{K[0]}[2]
mov.32 @x[2],@d[1]
dup $xa3,@{K[0]}[3]
lsr @x[3],@d[1],#32
dup $xb0,@{K[1]}[0]
mov.32 @x[4],@d[2]
dup $xb1,@{K[1]}[1]
lsr @x[5],@d[2],#32
dup $xb2,@{K[1]}[2]
mov.32 @x[6],@d[3]
dup $xb3,@{K[1]}[3]
lsr @x[7],@d[3],#32
dup $xd0,@{K[3]}[0]
mov.32 @x[8],@d[4]
dup $xd1,@{K[3]}[1]
lsr @x[9],@d[4],#32
dup $xd2,@{K[3]}[2]
mov.32 @x[10],@d[5]
dup $xd3,@{K[3]}[3]
lsr @x[11],@d[5],#32
add $xd0,$xd0,$CTR
mov.32 @x[12],@d[6]
dup $xc0,@{K[2]}[0]
lsr @x[13],@d[6],#32
dup $xc1,@{K[2]}[1]
mov.32 @x[14],@d[7]
dup $xc2,@{K[2]}[2]
lsr @x[15],@d[7],#32
dup $xc3,@{K[2]}[3]
mov $ctr,#10
subs $len,$len,#320
.Loop_neon:
sub $ctr,$ctr,#1
___
my @plus_one=&ROUND(0,4,8,12);
foreach (&NEON_lane_ROUND(0,4,8,12)) { eval; eval(shift(@plus_one)); }
@plus_one=&ROUND(0,5,10,15);
foreach (&NEON_lane_ROUND(0,5,10,15)) { eval; eval(shift(@plus_one)); }
$code.=<<___;
cbnz $ctr,.Loop_neon
add $xd0,$xd0,$CTR
zip1 $xt0,$xa0,$xa1 // transpose data
zip1 $xt1,$xa2,$xa3
zip2 $xt2,$xa0,$xa1
zip2 $xt3,$xa2,$xa3
zip1.64 $xa0,$xt0,$xt1
zip2.64 $xa1,$xt0,$xt1
zip1.64 $xa2,$xt2,$xt3
zip2.64 $xa3,$xt2,$xt3
zip1 $xt0,$xb0,$xb1
zip1 $xt1,$xb2,$xb3
zip2 $xt2,$xb0,$xb1
zip2 $xt3,$xb2,$xb3
zip1.64 $xb0,$xt0,$xt1
zip2.64 $xb1,$xt0,$xt1
zip1.64 $xb2,$xt2,$xt3
zip2.64 $xb3,$xt2,$xt3
zip1 $xt0,$xc0,$xc1
add.32 @x[0],@x[0],@d[0] // accumulate key block
zip1 $xt1,$xc2,$xc3
add @x[1],@x[1],@d[0],lsr#32
zip2 $xt2,$xc0,$xc1
add.32 @x[2],@x[2],@d[1]
zip2 $xt3,$xc2,$xc3
add @x[3],@x[3],@d[1],lsr#32
zip1.64 $xc0,$xt0,$xt1
add.32 @x[4],@x[4],@d[2]
zip2.64 $xc1,$xt0,$xt1
add @x[5],@x[5],@d[2],lsr#32
zip1.64 $xc2,$xt2,$xt3
add.32 @x[6],@x[6],@d[3]
zip2.64 $xc3,$xt2,$xt3
add @x[7],@x[7],@d[3],lsr#32
zip1 $xt0,$xd0,$xd1
add.32 @x[8],@x[8],@d[4]
zip1 $xt1,$xd2,$xd3
add @x[9],@x[9],@d[4],lsr#32
zip2 $xt2,$xd0,$xd1
add.32 @x[10],@x[10],@d[5]
zip2 $xt3,$xd2,$xd3
add @x[11],@x[11],@d[5],lsr#32
zip1.64 $xd0,$xt0,$xt1
add.32 @x[12],@x[12],@d[6]
zip2.64 $xd1,$xt0,$xt1
add @x[13],@x[13],@d[6],lsr#32
zip1.64 $xd2,$xt2,$xt3
add.32 @x[14],@x[14],@d[7]
zip2.64 $xd3,$xt2,$xt3
add @x[15],@x[15],@d[7],lsr#32
b.lo .Ltail_neon
add @x[0],@x[0],@x[1],lsl#32 // pack
add @x[2],@x[2],@x[3],lsl#32
ldp @x[1],@x[3],[$inp,#0] // load input
add $xa0,$xa0,@K[0] // accumulate key block
add @x[4],@x[4],@x[5],lsl#32
add @x[6],@x[6],@x[7],lsl#32
ldp @x[5],@x[7],[$inp,#16]
add $xb0,$xb0,@K[1]
add @x[8],@x[8],@x[9],lsl#32
add @x[10],@x[10],@x[11],lsl#32
ldp @x[9],@x[11],[$inp,#32]
add $xc0,$xc0,@K[2]
add @x[12],@x[12],@x[13],lsl#32
add @x[14],@x[14],@x[15],lsl#32
ldp @x[13],@x[15],[$inp,#48]
add $xd0,$xd0,@K[3]
add $inp,$inp,#64
#ifdef __AARCH64EB__
rev @x[0],@x[0]
rev @x[2],@x[2]
rev @x[4],@x[4]
rev @x[6],@x[6]
rev @x[8],@x[8]
rev @x[10],@x[10]
rev @x[12],@x[12]
rev @x[14],@x[14]
#endif
ld1.8 {$xt0-$xt3},[$inp],#64
eor @x[0],@x[0],@x[1]
add $xa1,$xa1,@K[0]
eor @x[2],@x[2],@x[3]
add $xb1,$xb1,@K[1]
eor @x[4],@x[4],@x[5]
add $xc1,$xc1,@K[2]
eor @x[6],@x[6],@x[7]
add $xd1,$xd1,@K[3]
eor @x[8],@x[8],@x[9]
eor $xa0,$xa0,$xt0
movi $xt0,#5
eor @x[10],@x[10],@x[11]
eor $xb0,$xb0,$xt1
eor @x[12],@x[12],@x[13]
eor $xc0,$xc0,$xt2
eor @x[14],@x[14],@x[15]
eor $xd0,$xd0,$xt3
add $CTR,$CTR,$xt0 // += 5
ld1.8 {$xt0-$xt3},[$inp],#64
stp @x[0],@x[2],[$out,#0] // store output
add @d[6],@d[6],#5 // increment counter
stp @x[4],@x[6],[$out,#16]
stp @x[8],@x[10],[$out,#32]
stp @x[12],@x[14],[$out,#48]
add $out,$out,#64
st1.8 {$xa0-$xd0},[$out],#64
add $xa2,$xa2,@K[0]
add $xb2,$xb2,@K[1]
add $xc2,$xc2,@K[2]
add $xd2,$xd2,@K[3]
ld1.8 {$xa0-$xd0},[$inp],#64
eor $xa1,$xa1,$xt0
eor $xb1,$xb1,$xt1
eor $xc1,$xc1,$xt2
eor $xd1,$xd1,$xt3
st1.8 {$xa1-$xd1},[$out],#64
add $xa3,$xa3,@K[0]
add $xb3,$xb3,@K[1]
add $xc3,$xc3,@K[2]
add $xd3,$xd3,@K[3]
ld1.8 {$xa1-$xd1},[$inp],#64
eor $xa2,$xa2,$xa0
eor $xb2,$xb2,$xb0
eor $xc2,$xc2,$xc0
eor $xd2,$xd2,$xd0
st1.8 {$xa2-$xd2},[$out],#64
eor $xa3,$xa3,$xa1
eor $xb3,$xb3,$xb1
eor $xc3,$xc3,$xc1
eor $xd3,$xd3,$xd1
st1.8 {$xa3-$xd3},[$out],#64
b.hi .Loop_outer_neon
ldp d8,d9,[sp] // meet ABI requirements
ldp x19,x20,[x29,#16]
add sp,sp,#64
ldp x21,x22,[x29,#32]
ldp x23,x24,[x29,#48]
ldp x25,x26,[x29,#64]
ldp x27,x28,[x29,#80]
ldp x29,x30,[sp],#96
AARCH64_VALIDATE_LINK_REGISTER
ret
.align 4
.Ltail_neon:
add $len,$len,#320
ldp d8,d9,[sp] // meet ABI requirements
cmp $len,#64
b.lo .Less_than_64
add @x[0],@x[0],@x[1],lsl#32 // pack
add @x[2],@x[2],@x[3],lsl#32
ldp @x[1],@x[3],[$inp,#0] // load input
add @x[4],@x[4],@x[5],lsl#32
add @x[6],@x[6],@x[7],lsl#32
ldp @x[5],@x[7],[$inp,#16]
add @x[8],@x[8],@x[9],lsl#32
add @x[10],@x[10],@x[11],lsl#32
ldp @x[9],@x[11],[$inp,#32]
add @x[12],@x[12],@x[13],lsl#32
add @x[14],@x[14],@x[15],lsl#32
ldp @x[13],@x[15],[$inp,#48]
add $inp,$inp,#64
#ifdef __AARCH64EB__
rev @x[0],@x[0]
rev @x[2],@x[2]
rev @x[4],@x[4]
rev @x[6],@x[6]
rev @x[8],@x[8]
rev @x[10],@x[10]
rev @x[12],@x[12]
rev @x[14],@x[14]
#endif
eor @x[0],@x[0],@x[1]
eor @x[2],@x[2],@x[3]
eor @x[4],@x[4],@x[5]
eor @x[6],@x[6],@x[7]
eor @x[8],@x[8],@x[9]
eor @x[10],@x[10],@x[11]
eor @x[12],@x[12],@x[13]
eor @x[14],@x[14],@x[15]
stp @x[0],@x[2],[$out,#0] // store output
add $xa0,$xa0,@K[0] // accumulate key block
stp @x[4],@x[6],[$out,#16]
add $xb0,$xb0,@K[1]
stp @x[8],@x[10],[$out,#32]
add $xc0,$xc0,@K[2]
stp @x[12],@x[14],[$out,#48]
add $xd0,$xd0,@K[3]
add $out,$out,#64
b.eq .Ldone_neon
sub $len,$len,#64
cmp $len,#64
b.lo .Last_neon
ld1.8 {$xt0-$xt3},[$inp],#64
eor $xa0,$xa0,$xt0
eor $xb0,$xb0,$xt1
eor $xc0,$xc0,$xt2
eor $xd0,$xd0,$xt3
st1.8 {$xa0-$xd0},[$out],#64
b.eq .Ldone_neon
add $xa0,$xa1,@K[0]
add $xb0,$xb1,@K[1]
sub $len,$len,#64
add $xc0,$xc1,@K[2]
cmp $len,#64
add $xd0,$xd1,@K[3]
b.lo .Last_neon
ld1.8 {$xt0-$xt3},[$inp],#64
eor $xa1,$xa0,$xt0
eor $xb1,$xb0,$xt1
eor $xc1,$xc0,$xt2
eor $xd1,$xd0,$xt3
st1.8 {$xa1-$xd1},[$out],#64
b.eq .Ldone_neon
add $xa0,$xa2,@K[0]
add $xb0,$xb2,@K[1]
sub $len,$len,#64
add $xc0,$xc2,@K[2]
cmp $len,#64
add $xd0,$xd2,@K[3]
b.lo .Last_neon
ld1.8 {$xt0-$xt3},[$inp],#64
eor $xa2,$xa0,$xt0
eor $xb2,$xb0,$xt1
eor $xc2,$xc0,$xt2
eor $xd2,$xd0,$xt3
st1.8 {$xa2-$xd2},[$out],#64
b.eq .Ldone_neon
add $xa0,$xa3,@K[0]
add $xb0,$xb3,@K[1]
add $xc0,$xc3,@K[2]
add $xd0,$xd3,@K[3]
sub $len,$len,#64
.Last_neon:
st1.8 {$xa0-$xd0},[sp]
sub $out,$out,#1
add $inp,$inp,$len
add $out,$out,$len
add $ctr,sp,$len
neg $len,$len
.Loop_tail_neon:
ldrb w10,[$inp,$len]
ldrb w11,[$ctr,$len]
add $len,$len,#1
eor w10,w10,w11
strb w10,[$out,$len]
cbnz $len,.Loop_tail_neon
stp xzr,xzr,[sp,#0]
stp xzr,xzr,[sp,#16]
stp xzr,xzr,[sp,#32]
stp xzr,xzr,[sp,#48]
.Ldone_neon:
ldp x19,x20,[x29,#16]
add sp,sp,#64
ldp x21,x22,[x29,#32]
ldp x23,x24,[x29,#48]
ldp x25,x26,[x29,#64]
ldp x27,x28,[x29,#80]
ldp x29,x30,[sp],#96
AARCH64_VALIDATE_LINK_REGISTER
ret
.size ChaCha20_neon,.-ChaCha20_neon
___
{
my @K = map("v$_.4s",(0..6));
my ($T0,$T1,$T2,$T3,$T4,$T5)=@K;
my ($A0,$B0,$C0,$D0,$A1,$B1,$C1,$D1,$A2,$B2,$C2,$D2,
$A3,$B3,$C3,$D3,$A4,$B4,$C4,$D4,$A5,$B5,$C5,$D5) = map("v$_.4s",(8..31));
my $rot24 = @K[6];
my $ONE = "v7.4s";
sub NEONROUND {
my $odd = pop;
my ($a,$b,$c,$d,$t)=@_;
(
"&add ('$a','$a','$b')",
"&eor ('$d','$d','$a')",
"&rev32_16 ('$d','$d')", # vrot ($d,16)
"&add ('$c','$c','$d')",
"&eor ('$t','$b','$c')",
"&ushr ('$b','$t',20)",
"&sli ('$b','$t',12)",
"&add ('$a','$a','$b')",
"&eor ('$d','$d','$a')",
"&tbl ('$d','{$d}','$rot24')",
"&add ('$c','$c','$d')",
"&eor ('$t','$b','$c')",
"&ushr ('$b','$t',25)",
"&sli ('$b','$t',7)",
"&ext ('$c','$c','$c',8)",
"&ext ('$d','$d','$d',$odd?4:12)",
"&ext ('$b','$b','$b',$odd?12:4)"
);
}
$code.=<<___;
.type ChaCha20_512_neon,%function
.align 5
ChaCha20_512_neon:
AARCH64_SIGN_LINK_REGISTER
stp x29,x30,[sp,#-96]!
add x29,sp,#0
adr @x[0],.Lsigma
stp x19,x20,[sp,#16]
stp x21,x22,[sp,#32]
stp x23,x24,[sp,#48]
stp x25,x26,[sp,#64]
stp x27,x28,[sp,#80]
.L512_or_more_neon:
sub sp,sp,#128+64
eor $ONE,$ONE,$ONE
ldp @d[0],@d[1],[@x[0]] // load sigma
ld1 {@K[0]},[@x[0]],#16
ldp @d[2],@d[3],[$key] // load key
ldp @d[4],@d[5],[$key,#16]
ld1 {@K[1],@K[2]},[$key]
ldp @d[6],@d[7],[$ctr] // load counter
ld1 {@K[3]},[$ctr]
ld1 {$ONE}[0],[@x[0]]
add $key,@x[0],#16 // .Lrot24
#ifdef __AARCH64EB__
rev64 @K[0],@K[0]
ror @d[2],@d[2],#32
ror @d[3],@d[3],#32
ror @d[4],@d[4],#32
ror @d[5],@d[5],#32
ror @d[6],@d[6],#32
ror @d[7],@d[7],#32
#endif
add @K[3],@K[3],$ONE // += 1
stp @K[0],@K[1],[sp,#0] // off-load key block, invariant part
add @K[3],@K[3],$ONE // not typo
str @K[2],[sp,#32]
add @K[4],@K[3],$ONE
add @K[5],@K[4],$ONE
add @K[6],@K[5],$ONE
shl $ONE,$ONE,#2 // 1 -> 4
stp d8,d9,[sp,#128+0] // meet ABI requirements
stp d10,d11,[sp,#128+16]
stp d12,d13,[sp,#128+32]
stp d14,d15,[sp,#128+48]
sub $len,$len,#512 // not typo
.Loop_outer_512_neon:
mov $A0,@K[0]
mov $A1,@K[0]
mov $A2,@K[0]
mov $A3,@K[0]
mov $A4,@K[0]
mov $A5,@K[0]
mov $B0,@K[1]
mov.32 @x[0],@d[0] // unpack key block
mov $B1,@K[1]
lsr @x[1],@d[0],#32
mov $B2,@K[1]
mov.32 @x[2],@d[1]
mov $B3,@K[1]
lsr @x[3],@d[1],#32
mov $B4,@K[1]
mov.32 @x[4],@d[2]
mov $B5,@K[1]
lsr @x[5],@d[2],#32
mov $D0,@K[3]
mov.32 @x[6],@d[3]
mov $D1,@K[4]
lsr @x[7],@d[3],#32
mov $D2,@K[5]
mov.32 @x[8],@d[4]
mov $D3,@K[6]
lsr @x[9],@d[4],#32
mov $C0,@K[2]
mov.32 @x[10],@d[5]
mov $C1,@K[2]
lsr @x[11],@d[5],#32
add $D4,$D0,$ONE // +4
mov.32 @x[12],@d[6]
add $D5,$D1,$ONE // +4
lsr @x[13],@d[6],#32
mov $C2,@K[2]
mov.32 @x[14],@d[7]
mov $C3,@K[2]
lsr @x[15],@d[7],#32
mov $C4,@K[2]
stp @K[3],@K[4],[sp,#48] // off-load key block, variable part
mov $C5,@K[2]
stp @K[5],@K[6],[sp,#80]
mov $ctr,#5
ld1 {$rot24},[$key]
subs $len,$len,#512
.Loop_upper_neon:
sub $ctr,$ctr,#1
___
my @thread0=&NEONROUND($A0,$B0,$C0,$D0,$T0,0);
my @thread1=&NEONROUND($A1,$B1,$C1,$D1,$T1,0);
my @thread2=&NEONROUND($A2,$B2,$C2,$D2,$T2,0);
my @thread3=&NEONROUND($A3,$B3,$C3,$D3,$T3,0);
my @thread4=&NEONROUND($A4,$B4,$C4,$D4,$T4,0);
my @thread5=&NEONROUND($A5,$B5,$C5,$D5,$T5,0);
my @thread67=(&ROUND(0,4,8,12),&ROUND(0,5,10,15));
my $diff = ($#thread0+1)*6 - $#thread67 - 1;
my $i = 0;
foreach (@thread0) {
eval; eval(shift(@thread67));
eval(shift(@thread1)); eval(shift(@thread67));
eval(shift(@thread2)); eval(shift(@thread67));
eval(shift(@thread3)); eval(shift(@thread67));
eval(shift(@thread4)); eval(shift(@thread67));
eval(shift(@thread5)); eval(shift(@thread67));
}
@thread0=&NEONROUND($A0,$B0,$C0,$D0,$T0,1);
@thread1=&NEONROUND($A1,$B1,$C1,$D1,$T1,1);
@thread2=&NEONROUND($A2,$B2,$C2,$D2,$T2,1);
@thread3=&NEONROUND($A3,$B3,$C3,$D3,$T3,1);
@thread4=&NEONROUND($A4,$B4,$C4,$D4,$T4,1);
@thread5=&NEONROUND($A5,$B5,$C5,$D5,$T5,1);
@thread67=(&ROUND(0,4,8,12),&ROUND(0,5,10,15));
foreach (@thread0) {
eval; eval(shift(@thread67));
eval(shift(@thread1)); eval(shift(@thread67));
eval(shift(@thread2)); eval(shift(@thread67));
eval(shift(@thread3)); eval(shift(@thread67));
eval(shift(@thread4)); eval(shift(@thread67));
eval(shift(@thread5)); eval(shift(@thread67));
}
$code.=<<___;
cbnz $ctr,.Loop_upper_neon
add.32 @x[0],@x[0],@d[0] // accumulate key block
add @x[1],@x[1],@d[0],lsr#32
add.32 @x[2],@x[2],@d[1]
add @x[3],@x[3],@d[1],lsr#32
add.32 @x[4],@x[4],@d[2]
add @x[5],@x[5],@d[2],lsr#32
add.32 @x[6],@x[6],@d[3]
add @x[7],@x[7],@d[3],lsr#32
add.32 @x[8],@x[8],@d[4]
add @x[9],@x[9],@d[4],lsr#32
add.32 @x[10],@x[10],@d[5]
add @x[11],@x[11],@d[5],lsr#32
add.32 @x[12],@x[12],@d[6]
add @x[13],@x[13],@d[6],lsr#32
add.32 @x[14],@x[14],@d[7]
add @x[15],@x[15],@d[7],lsr#32
add @x[0],@x[0],@x[1],lsl#32 // pack
add @x[2],@x[2],@x[3],lsl#32
ldp @x[1],@x[3],[$inp,#0] // load input
add @x[4],@x[4],@x[5],lsl#32
add @x[6],@x[6],@x[7],lsl#32
ldp @x[5],@x[7],[$inp,#16]
add @x[8],@x[8],@x[9],lsl#32
add @x[10],@x[10],@x[11],lsl#32
ldp @x[9],@x[11],[$inp,#32]
add @x[12],@x[12],@x[13],lsl#32
add @x[14],@x[14],@x[15],lsl#32
ldp @x[13],@x[15],[$inp,#48]
add $inp,$inp,#64
#ifdef __AARCH64EB__
rev @x[0],@x[0]
rev @x[2],@x[2]
rev @x[4],@x[4]
rev @x[6],@x[6]
rev @x[8],@x[8]
rev @x[10],@x[10]
rev @x[12],@x[12]
rev @x[14],@x[14]
#endif
eor @x[0],@x[0],@x[1]
eor @x[2],@x[2],@x[3]
eor @x[4],@x[4],@x[5]
eor @x[6],@x[6],@x[7]
eor @x[8],@x[8],@x[9]
eor @x[10],@x[10],@x[11]
eor @x[12],@x[12],@x[13]
eor @x[14],@x[14],@x[15]
stp @x[0],@x[2],[$out,#0] // store output
add @d[6],@d[6],#1 // increment counter
mov.32 @x[0],@d[0] // unpack key block
lsr @x[1],@d[0],#32
stp @x[4],@x[6],[$out,#16]
mov.32 @x[2],@d[1]
lsr @x[3],@d[1],#32
stp @x[8],@x[10],[$out,#32]
mov.32 @x[4],@d[2]
lsr @x[5],@d[2],#32
stp @x[12],@x[14],[$out,#48]
add $out,$out,#64
mov.32 @x[6],@d[3]
lsr @x[7],@d[3],#32
mov.32 @x[8],@d[4]
lsr @x[9],@d[4],#32
mov.32 @x[10],@d[5]
lsr @x[11],@d[5],#32
mov.32 @x[12],@d[6]
lsr @x[13],@d[6],#32
mov.32 @x[14],@d[7]
lsr @x[15],@d[7],#32
mov $ctr,#5
.Loop_lower_neon:
sub $ctr,$ctr,#1
___
@thread0=&NEONROUND($A0,$B0,$C0,$D0,$T0,0);
@thread1=&NEONROUND($A1,$B1,$C1,$D1,$T1,0);
@thread2=&NEONROUND($A2,$B2,$C2,$D2,$T2,0);
@thread3=&NEONROUND($A3,$B3,$C3,$D3,$T3,0);
@thread4=&NEONROUND($A4,$B4,$C4,$D4,$T4,0);
@thread5=&NEONROUND($A5,$B5,$C5,$D5,$T5,0);
@thread67=(&ROUND(0,4,8,12),&ROUND(0,5,10,15));
foreach (@thread0) {
eval; eval(shift(@thread67));
eval(shift(@thread1)); eval(shift(@thread67));
eval(shift(@thread2)); eval(shift(@thread67));
eval(shift(@thread3)); eval(shift(@thread67));
eval(shift(@thread4)); eval(shift(@thread67));
eval(shift(@thread5)); eval(shift(@thread67));
}
@thread0=&NEONROUND($A0,$B0,$C0,$D0,$T0,1);
@thread1=&NEONROUND($A1,$B1,$C1,$D1,$T1,1);
@thread2=&NEONROUND($A2,$B2,$C2,$D2,$T2,1);
@thread3=&NEONROUND($A3,$B3,$C3,$D3,$T3,1);
@thread4=&NEONROUND($A4,$B4,$C4,$D4,$T4,1);
@thread5=&NEONROUND($A5,$B5,$C5,$D5,$T5,1);
@thread67=(&ROUND(0,4,8,12),&ROUND(0,5,10,15));
foreach (@thread0) {
eval; eval(shift(@thread67));
eval(shift(@thread1)); eval(shift(@thread67));
eval(shift(@thread2)); eval(shift(@thread67));
eval(shift(@thread3)); eval(shift(@thread67));
eval(shift(@thread4)); eval(shift(@thread67));
eval(shift(@thread5)); eval(shift(@thread67));
}
$code.=<<___;
cbnz $ctr,.Loop_lower_neon
add.32 @x[0],@x[0],@d[0] // accumulate key block
ldp @K[0],@K[1],[sp,#0]
add @x[1],@x[1],@d[0],lsr#32
ldp @K[2],@K[3],[sp,#32]
add.32 @x[2],@x[2],@d[1]
ldp @K[4],@K[5],[sp,#64]
add @x[3],@x[3],@d[1],lsr#32
ldr @K[6],[sp,#96]
add $A0,$A0,@K[0]
add.32 @x[4],@x[4],@d[2]
add $A1,$A1,@K[0]
add @x[5],@x[5],@d[2],lsr#32
add $A2,$A2,@K[0]
add.32 @x[6],@x[6],@d[3]
add $A3,$A3,@K[0]
add @x[7],@x[7],@d[3],lsr#32
add $A4,$A4,@K[0]
add.32 @x[8],@x[8],@d[4]
add $A5,$A5,@K[0]
add @x[9],@x[9],@d[4],lsr#32
add $C0,$C0,@K[2]
add.32 @x[10],@x[10],@d[5]
add $C1,$C1,@K[2]
add @x[11],@x[11],@d[5],lsr#32
add $C2,$C2,@K[2]
add.32 @x[12],@x[12],@d[6]
add $C3,$C3,@K[2]
add @x[13],@x[13],@d[6],lsr#32
add $C4,$C4,@K[2]
add.32 @x[14],@x[14],@d[7]
add $C5,$C5,@K[2]
add @x[15],@x[15],@d[7],lsr#32
add $D4,$D4,$ONE // +4
add @x[0],@x[0],@x[1],lsl#32 // pack
add $D5,$D5,$ONE // +4
add @x[2],@x[2],@x[3],lsl#32
add $D0,$D0,@K[3]
ldp @x[1],@x[3],[$inp,#0] // load input
add $D1,$D1,@K[4]
add @x[4],@x[4],@x[5],lsl#32
add $D2,$D2,@K[5]
add @x[6],@x[6],@x[7],lsl#32
add $D3,$D3,@K[6]
ldp @x[5],@x[7],[$inp,#16]
add $D4,$D4,@K[3]
add @x[8],@x[8],@x[9],lsl#32
add $D5,$D5,@K[4]
add @x[10],@x[10],@x[11],lsl#32
add $B0,$B0,@K[1]
ldp @x[9],@x[11],[$inp,#32]
add $B1,$B1,@K[1]
add @x[12],@x[12],@x[13],lsl#32
add $B2,$B2,@K[1]
add @x[14],@x[14],@x[15],lsl#32
add $B3,$B3,@K[1]
ldp @x[13],@x[15],[$inp,#48]
add $B4,$B4,@K[1]
add $inp,$inp,#64
add $B5,$B5,@K[1]
#ifdef __AARCH64EB__
rev @x[0],@x[0]
rev @x[2],@x[2]
rev @x[4],@x[4]
rev @x[6],@x[6]
rev @x[8],@x[8]
rev @x[10],@x[10]
rev @x[12],@x[12]
rev @x[14],@x[14]
#endif
ld1.8 {$T0-$T3},[$inp],#64
eor @x[0],@x[0],@x[1]
eor @x[2],@x[2],@x[3]
eor @x[4],@x[4],@x[5]
eor @x[6],@x[6],@x[7]
eor @x[8],@x[8],@x[9]
eor $A0,$A0,$T0
eor @x[10],@x[10],@x[11]
eor $B0,$B0,$T1
eor @x[12],@x[12],@x[13]
eor $C0,$C0,$T2
eor @x[14],@x[14],@x[15]
eor $D0,$D0,$T3
ld1.8 {$T0-$T3},[$inp],#64
stp @x[0],@x[2],[$out,#0] // store output
add @d[6],@d[6],#7 // increment counter
stp @x[4],@x[6],[$out,#16]
stp @x[8],@x[10],[$out,#32]
stp @x[12],@x[14],[$out,#48]
add $out,$out,#64
st1.8 {$A0-$D0},[$out],#64
ld1.8 {$A0-$D0},[$inp],#64
eor $A1,$A1,$T0
eor $B1,$B1,$T1
eor $C1,$C1,$T2
eor $D1,$D1,$T3
st1.8 {$A1-$D1},[$out],#64
ld1.8 {$A1-$D1},[$inp],#64
eor $A2,$A2,$A0
ldp @K[0],@K[1],[sp,#0]
eor $B2,$B2,$B0
ldp @K[2],@K[3],[sp,#32]
eor $C2,$C2,$C0
eor $D2,$D2,$D0
st1.8 {$A2-$D2},[$out],#64
ld1.8 {$A2-$D2},[$inp],#64
eor $A3,$A3,$A1
eor $B3,$B3,$B1
eor $C3,$C3,$C1
eor $D3,$D3,$D1
st1.8 {$A3-$D3},[$out],#64
ld1.8 {$A3-$D3},[$inp],#64
eor $A4,$A4,$A2
eor $B4,$B4,$B2
eor $C4,$C4,$C2
eor $D4,$D4,$D2
st1.8 {$A4-$D4},[$out],#64
shl $A0,$ONE,#1 // 4 -> 8
eor $A5,$A5,$A3
eor $B5,$B5,$B3
eor $C5,$C5,$C3
eor $D5,$D5,$D3
st1.8 {$A5-$D5},[$out],#64
add @K[3],@K[3],$A0 // += 8
add @K[4],@K[4],$A0
add @K[5],@K[5],$A0
add @K[6],@K[6],$A0
b.hs .Loop_outer_512_neon
adds $len,$len,#512
ushr $ONE,$ONE,#1 // 4 -> 2
ldp d10,d11,[sp,#128+16] // meet ABI requirements
ldp d12,d13,[sp,#128+32]
ldp d14,d15,[sp,#128+48]
stp @K[0],@K[0],[sp,#0] // wipe off-load area
stp @K[0],@K[0],[sp,#32]
stp @K[0],@K[0],[sp,#64]
b.eq .Ldone_512_neon
sub $key,$key,#16 // .Lone
cmp $len,#192
add sp,sp,#128
sub @K[3],@K[3],$ONE // -= 2
ld1 {$CTR,$ROT24},[$key]
b.hs .Loop_outer_neon
ldp d8,d9,[sp,#0] // meet ABI requirements
eor @K[1],@K[1],@K[1]
eor @K[2],@K[2],@K[2]
eor @K[3],@K[3],@K[3]
eor @K[4],@K[4],@K[4]
eor @K[5],@K[5],@K[5]
eor @K[6],@K[6],@K[6]
b .Loop_outer
.Ldone_512_neon:
ldp d8,d9,[sp,#128+0] // meet ABI requirements
ldp x19,x20,[x29,#16]
add sp,sp,#128+64
ldp x21,x22,[x29,#32]
ldp x23,x24,[x29,#48]
ldp x25,x26,[x29,#64]
ldp x27,x28,[x29,#80]
ldp x29,x30,[sp],#96
AARCH64_VALIDATE_LINK_REGISTER
ret
.size ChaCha20_512_neon,.-ChaCha20_512_neon
___
}
}}}
foreach (split("\n",$code)) {
s/\`([^\`]*)\`/eval $1/geo;
(s/\b([a-z]+)\.32\b/$1/ and (s/x([0-9]+)/w$1/g or 1)) or
(m/\b(eor|ext|mov|tbl)\b/ and (s/\.4s/\.16b/g or 1)) or
(s/\b((?:ld|st)1)\.8\b/$1/ and (s/\.4s/\.16b/g or 1)) or
(m/\b(ld|st)[rp]\b/ and (s/v([0-9]+)\.4s/q$1/g or 1)) or
(m/\b(dup|ld1)\b/ and (s/\.4(s}?\[[0-3]\])/.$1/g or 1)) or
(s/\b(zip[12])\.64\b/$1/ and (s/\.4s/\.2d/g or 1)) or
(s/\brev32\.16\b/rev32/ and (s/\.4s/\.8h/g or 1));
#s/\bq([0-9]+)#(lo|hi)/sprintf "d%d",2*$1+($2 eq "hi")/geo;
print $_,"\n";
}
close STDOUT or die "error closing STDOUT: $!"; # flush
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