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#! /usr/bin/env perl
# Copyright 2016 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
#
# ====================================================================
# 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.
#
# Performance in cycles per byte out of large buffer.
#
# IALU/gcc-4.9 3xNEON+1xIALU 6xNEON+2xIALU
#
# Apple A7 5.50/+49% 3.33 1.70
# Cortex-A53 8.40/+80% 4.72 4.72(*)
# Cortex-A57 8.06/+43% 4.90 4.43(**)
# Denver 4.50/+82% 2.63 2.67(*)
# X-Gene 9.50/+46% 8.82 8.89(*)
# Mongoose 8.00/+44% 3.64 3.25
# Kryo 8.17/+50% 4.83 4.65
#
# (*) it's expected that doubling interleave factor doesn't help
# all processors, only those with higher NEON latency and
# higher instruction issue rate;
# (**) expected improvement was actually higher;
$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;
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 <GFp/arm_arch.h>
.text
.extern GFp_armcap_P
.align 5
.Lsigma:
.quad 0x3320646e61707865,0x6b20657479622d32 // endian-neutral
.Lone:
.long 1,0,0,0
.LGFp_armcap_P:
#ifdef __ILP32__
.long GFp_armcap_P-.
#else
.quad GFp_armcap_P-.
#endif
.asciz "ChaCha20 for ARMv8, CRYPTOGAMS by <appro\@openssl.org>"
.globl GFp_ChaCha20_ctr32
.type GFp_ChaCha20_ctr32,%function
.align 5
GFp_ChaCha20_ctr32:
cbz $len,.Labort
adr @x[0],.LGFp_armcap_P
cmp $len,#192
b.lo .Lshort
#ifdef __ILP32__
ldrsw @x[1],[@x[0]]
#else
ldr @x[1],[@x[0]]
#endif
ldr w17,[@x[1],@x[0]]
tst w17,#ARMV7_NEON
b.ne ChaCha20_neon
.Lshort:
stp x29,x30,[sp,#-96]!
add x29,sp,#0
adr @x[0],.Lsigma
stp x19,x20,[sp,#16]
stp x21,x22,[sp,#32]
stp x23,x24,[sp,#48]
stp x25,x26,[sp,#64]
stp x27,x28,[sp,#80]
sub sp,sp,#64
ldp @d[0],@d[1],[@x[0]] // load sigma
ldp @d[2],@d[3],[$key] // load key
ldp @d[4],@d[5],[$key,#16]
ldp @d[6],@d[7],[$ctr] // load counter
#ifdef __ARMEB__
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 __ARMEB__
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:
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 __ARMEB__
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 $len,.Loop_tail
stp xzr,xzr,[sp,#0]
stp xzr,xzr,[sp,#16]
stp xzr,xzr,[sp,#32]
stp xzr,xzr,[sp,#48]
ldp x19,x20,[x29,#16]
add sp,sp,#64
ldp x21,x22,[x29,#32]
ldp x23,x24,[x29,#48]
ldp x25,x26,[x29,#64]
ldp x27,x28,[x29,#80]
ldp x29,x30,[sp],#96
ret
.size GFp_ChaCha20_ctr32,.-GFp_ChaCha20_ctr32
___
{{{
my ($A0,$B0,$C0,$D0,$A1,$B1,$C1,$D1,$A2,$B2,$C2,$D2,$T0,$T1,$T2,$T3) =
map("v$_.4s",(0..7,16..23));
my (@K)=map("v$_.4s",(24..30));
my $ONE="v31.4s";
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 ('$t','$d','$a')",
"&ushr ('$d','$t',24)",
"&sli ('$d','$t',8)",
"&add ('$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_neon,%function
.align 5
ChaCha20_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]
ld1 {$ONE},[@x[0]]
#ifdef __ARMEB__
rev64 @K[0],@K[0]
ror @d[2],@d[2],#32
ror @d[3],@d[3],#32
ror @d[4],@d[4],#32
ror @d[5],@d[5],#32
ror @d[6],@d[6],#32
ror @d[7],@d[7],#32
#endif
add @K[3],@K[3],$ONE // += 1
add @K[4],@K[3],$ONE
add @K[5],@K[4],$ONE
shl $ONE,$ONE,#2 // 1 -> 4
.Loop_outer_neon:
mov.32 @x[0],@d[0] // unpack key block
lsr @x[1],@d[0],#32
mov $A0,@K[0]
mov.32 @x[2],@d[1]
lsr @x[3],@d[1],#32
mov $A1,@K[0]
mov.32 @x[4],@d[2]
lsr @x[5],@d[2],#32
mov $A2,@K[0]
mov.32 @x[6],@d[3]
mov $B0,@K[1]
lsr @x[7],@d[3],#32
mov $B1,@K[1]
mov.32 @x[8],@d[4]
mov $B2,@K[1]
lsr @x[9],@d[4],#32
mov $D0,@K[3]
mov.32 @x[10],@d[5]
mov $D1,@K[4]
lsr @x[11],@d[5],#32
mov $D2,@K[5]
mov.32 @x[12],@d[6]
mov $C0,@K[2]
lsr @x[13],@d[6],#32
mov $C1,@K[2]
mov.32 @x[14],@d[7]
mov $C2,@K[2]
lsr @x[15],@d[7],#32
mov $ctr,#10
subs $len,$len,#256
.Loop_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,$T2,0);
my @thread3=&ROUND(0,4,8,12);
foreach (@thread0) {
eval; eval(shift(@thread3));
eval(shift(@thread1)); eval(shift(@thread3));
eval(shift(@thread2)); eval(shift(@thread3));
}
@thread0=&NEONROUND($A0,$B0,$C0,$D0,$T0,1);
@thread1=&NEONROUND($A1,$B1,$C1,$D1,$T1,1);
@thread2=&NEONROUND($A2,$B2,$C2,$D2,$T2,1);
@thread3=&ROUND(0,5,10,15);
foreach (@thread0) {
eval; eval(shift(@thread3));
eval(shift(@thread1)); eval(shift(@thread3));
eval(shift(@thread2)); eval(shift(@thread3));
}
$code.=<<___;
cbnz $ctr,.Loop_neon
add.32 @x[0],@x[0],@d[0] // accumulate key block
add $A0,$A0,@K[0]
add @x[1],@x[1],@d[0],lsr#32
add $A1,$A1,@K[0]
add.32 @x[2],@x[2],@d[1]
add $A2,$A2,@K[0]
add @x[3],@x[3],@d[1],lsr#32
add $C0,$C0,@K[2]
add.32 @x[4],@x[4],@d[2]
add $C1,$C1,@K[2]
add @x[5],@x[5],@d[2],lsr#32
add $C2,$C2,@K[2]
add.32 @x[6],@x[6],@d[3]
add $D0,$D0,@K[3]
add @x[7],@x[7],@d[3],lsr#32
add.32 @x[8],@x[8],@d[4]
add $D1,$D1,@K[4]
add @x[9],@x[9],@d[4],lsr#32
add.32 @x[10],@x[10],@d[5]
add $D2,$D2,@K[5]
add @x[11],@x[11],@d[5],lsr#32
add.32 @x[12],@x[12],@d[6]
add $B0,$B0,@K[1]
add @x[13],@x[13],@d[6],lsr#32
add.32 @x[14],@x[14],@d[7]
add $B1,$B1,@K[1]
add @x[15],@x[15],@d[7],lsr#32
add $B2,$B2,@K[1]
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],[$inp,#0] // load input
add @x[4],@x[4],@x[5],lsl#32
add @x[6],@x[6],@x[7],lsl#32
ldp @x[5],@x[7],[$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 __ARMEB__
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],[$out,#0] // store output
add @d[6],@d[6],#4 // increment counter
stp @x[4],@x[6],[$out,#16]
add @K[3],@K[3],$ONE // += 4
stp @x[8],@x[10],[$out,#32]
add @K[4],@K[4],$ONE
stp @x[12],@x[14],[$out,#48]
add @K[5],@K[5],$ONE
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
eor $A2,$A2,$A0
eor $B2,$B2,$B0
eor $C2,$C2,$C0
eor $D2,$D2,$D0
st1.8 {$A2-$D2},[$out],#64
b.hi .Loop_outer_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
ret
.Ltail_neon:
add $len,$len,#256
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 __ARMEB__
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],[$out,#0] // store output
add @d[6],@d[6],#4 // increment counter
stp @x[4],@x[6],[$out,#16]
stp @x[8],@x[10],[$out,#32]
stp @x[12],@x[14],[$out,#48]
add $out,$out,#64
b.eq .Ldone_neon
sub $len,$len,#64
cmp $len,#64
b.lo .Less_than_128
ld1.8 {$T0-$T3},[$inp],#64
eor $A0,$A0,$T0
eor $B0,$B0,$T1
eor $C0,$C0,$T2
eor $D0,$D0,$T3
st1.8 {$A0-$D0},[$out],#64
b.eq .Ldone_neon
sub $len,$len,#64
cmp $len,#64
b.lo .Less_than_192
ld1.8 {$T0-$T3},[$inp],#64
eor $A1,$A1,$T0
eor $B1,$B1,$T1
eor $C1,$C1,$T2
eor $D1,$D1,$T3
st1.8 {$A1-$D1},[$out],#64
b.eq .Ldone_neon
sub $len,$len,#64
st1.8 {$A2-$D2},[sp]
b .Last_neon
.Less_than_128:
st1.8 {$A0-$D0},[sp]
b .Last_neon
.Less_than_192:
st1.8 {$A1-$D1},[sp]
b .Last_neon
.align 4
.Last_neon:
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 $len,.Loop_tail_neon
stp xzr,xzr,[sp,#0]
stp xzr,xzr,[sp,#16]
stp xzr,xzr,[sp,#32]
stp xzr,xzr,[sp,#48]
.Ldone_neon:
ldp x19,x20,[x29,#16]
add sp,sp,#64
ldp x21,x22,[x29,#32]
ldp x23,x24,[x29,#48]
ldp x25,x26,[x29,#64]
ldp x27,x28,[x29,#80]
ldp x29,x30,[sp],#96
ret
.size ChaCha20_neon,.-ChaCha20_neon
___
{
my ($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",(0..23));
$code.=<<___;
.type ChaCha20_512_neon,%function
.align 5
ChaCha20_512_neon:
stp x29,x30,[sp,#-96]!
add x29,sp,#0
adr @x[0],.Lsigma
stp x19,x20,[sp,#16]
stp x21,x22,[sp,#32]
stp x23,x24,[sp,#48]
stp x25,x26,[sp,#64]
stp x27,x28,[sp,#80]
.L512_or_more_neon:
sub sp,sp,#128+64
ldp @d[0],@d[1],[@x[0]] // load sigma
ld1 {@K[0]},[@x[0]],#16
ldp @d[2],@d[3],[$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]
ld1 {$ONE},[@x[0]]
#ifdef __ARMEB__
rev64 @K[0],@K[0]
ror @d[2],@d[2],#32
ror @d[3],@d[3],#32
ror @d[4],@d[4],#32
ror @d[5],@d[5],#32
ror @d[6],@d[6],#32
ror @d[7],@d[7],#32
#endif
add @K[3],@K[3],$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]
str @K[5],[sp,#80]
mov $ctr,#5
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 __ARMEB__
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
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 __ARMEB__
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 $A0,$ONE,#2 // 4 -> 1
ldp d8,d9,[sp,#128+0] // meet ABI requirements
ldp d10,d11,[sp,#128+16]
ldp d12,d13,[sp,#128+32]
ldp d14,d15,[sp,#128+48]
stp @K[0],$ONE,[sp,#0] // wipe off-load area
stp @K[0],$ONE,[sp,#32]
stp @K[0],$ONE,[sp,#64]
b.eq .Ldone_512_neon
cmp $len,#192
sub @K[3],@K[3],$A0 // -= 1
sub @K[4],@K[4],$A0
sub @K[5],@K[5],$A0
add sp,sp,#128
b.hs .Loop_outer_neon
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 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
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)\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
(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; # flush