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openssl/crypto/chacha/asm/chachap10-ppc.pl
Paul E. Murphy daead12df0 Fix big-endian Power10 chacha20 implementation 
Some of the BE specific permutes were incorrect. Fix them.

This passes all tests on a P10/ppc64 debian unstable host.

Fixes #25451

CLA: trivial

Reviewed-by: Paul Dale <ppzgs1@gmail.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25483)
2024-09-19 11:13:35 +02:00

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#! /usr/bin/env perl
# Copyright 2016-2024 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/.
# ====================================================================
#
# October 2015
#
# ChaCha20 for PowerPC/AltiVec.
#
# June 2018
#
# Add VSX 2.07 code path. Original 3xAltiVec+1xIALU is well-suited for
# processors that can't issue more than one vector instruction per
# cycle. But POWER8 (and POWER9) can issue a pair, and vector-only 4x
# interleave would perform better. Incidentally PowerISA 2.07 (first
# implemented by POWER8) defined new usable instructions, hence 4xVSX
# code path...
#
# Performance in cycles per byte out of large buffer.
#
# IALU/gcc-4.x 3xAltiVec+1xIALU 4xVSX
#
# Freescale e300 13.6/+115% - -
# PPC74x0/G4e 6.81/+310% 3.81 -
# PPC970/G5 9.29/+160% ? -
# POWER7 8.62/+61% 3.35 -
# POWER8 8.70/+51% 2.91 2.09
# POWER9 8.80/+29% 4.44(*) 2.45(**)
#
# (*) this is trade-off result, it's possible to improve it, but
# then it would negatively affect all others;
# (**) POWER9 seems to be "allergic" to mixing vector and integer
# instructions, which is why switch to vector-only code pays
# off that much;
# $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 && $ARGV[0] !~ m|\.| ? shift : undef;
if ($flavour =~ /64/) {
$SIZE_T =8;
$LRSAVE =2*$SIZE_T;
$STU ="stdu";
$POP ="ld";
$PUSH ="std";
$UCMP ="cmpld";
} elsif ($flavour =~ /32/) {
$SIZE_T =4;
$LRSAVE =$SIZE_T;
$STU ="stwu";
$POP ="lwz";
$PUSH ="stw";
$UCMP ="cmplw";
} else { die "nonsense $flavour"; }
$LITTLE_ENDIAN = ($flavour=~/le$/) ? 1 : 0;
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
( $xlate="${dir}ppc-xlate.pl" and -f $xlate ) or
( $xlate="${dir}../../perlasm/ppc-xlate.pl" and -f $xlate) or
die "can't locate ppc-xlate.pl";
open STDOUT,"| $^X $xlate $flavour \"$output\""
or die "can't call $xlate: $!";
$LOCALS=6*$SIZE_T;
$FRAME=$LOCALS+64+18*$SIZE_T; # 64 is for local variables
sub AUTOLOAD() # thunk [simplified] x86-style perlasm
{ my $opcode = $AUTOLOAD; $opcode =~ s/.*:://; $opcode =~ s/_/\./;
$code .= "\t$opcode\t".join(',',@_)."\n";
}
my $sp = "r1";
my ($out,$inp,$len,$key,$ctr) = map("r$_",(3..7));
{{{
my ($xa0,$xa1,$xa2,$xa3, $xb0,$xb1,$xb2,$xb3,
$xc0,$xc1,$xc2,$xc3, $xd0,$xd1,$xd2,$xd3) = map("v$_",(0..15));
my @K = map("v$_",(16..19));
my $CTR = "v26";
my ($xt0,$xt1,$xt2,$xt3) = map("v$_",(27..30));
my ($sixteen,$twelve,$eight,$seven) = ($xt0,$xt1,$xt2,$xt3);
my $beperm = "v31";
my ($x00,$x10,$x20,$x30) = (0, map("r$_",(8..10)));
my $FRAME=$LOCALS+64+7*16; # 7*16 is for v26-v31 offload
sub VSX_lane_ROUND_4x {
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("\"v$_\"",(0..15));
(
"&vadduwm (@x[$a0],@x[$a0],@x[$b0])", # Q1
"&vadduwm (@x[$a1],@x[$a1],@x[$b1])", # Q2
"&vadduwm (@x[$a2],@x[$a2],@x[$b2])", # Q3
"&vadduwm (@x[$a3],@x[$a3],@x[$b3])", # Q4
"&vxor (@x[$d0],@x[$d0],@x[$a0])",
"&vxor (@x[$d1],@x[$d1],@x[$a1])",
"&vxor (@x[$d2],@x[$d2],@x[$a2])",
"&vxor (@x[$d3],@x[$d3],@x[$a3])",
"&vrlw (@x[$d0],@x[$d0],'$sixteen')",
"&vrlw (@x[$d1],@x[$d1],'$sixteen')",
"&vrlw (@x[$d2],@x[$d2],'$sixteen')",
"&vrlw (@x[$d3],@x[$d3],'$sixteen')",
"&vadduwm (@x[$c0],@x[$c0],@x[$d0])",
"&vadduwm (@x[$c1],@x[$c1],@x[$d1])",
"&vadduwm (@x[$c2],@x[$c2],@x[$d2])",
"&vadduwm (@x[$c3],@x[$c3],@x[$d3])",
"&vxor (@x[$b0],@x[$b0],@x[$c0])",
"&vxor (@x[$b1],@x[$b1],@x[$c1])",
"&vxor (@x[$b2],@x[$b2],@x[$c2])",
"&vxor (@x[$b3],@x[$b3],@x[$c3])",
"&vrlw (@x[$b0],@x[$b0],'$twelve')",
"&vrlw (@x[$b1],@x[$b1],'$twelve')",
"&vrlw (@x[$b2],@x[$b2],'$twelve')",
"&vrlw (@x[$b3],@x[$b3],'$twelve')",
"&vadduwm (@x[$a0],@x[$a0],@x[$b0])",
"&vadduwm (@x[$a1],@x[$a1],@x[$b1])",
"&vadduwm (@x[$a2],@x[$a2],@x[$b2])",
"&vadduwm (@x[$a3],@x[$a3],@x[$b3])",
"&vxor (@x[$d0],@x[$d0],@x[$a0])",
"&vxor (@x[$d1],@x[$d1],@x[$a1])",
"&vxor (@x[$d2],@x[$d2],@x[$a2])",
"&vxor (@x[$d3],@x[$d3],@x[$a3])",
"&vrlw (@x[$d0],@x[$d0],'$eight')",
"&vrlw (@x[$d1],@x[$d1],'$eight')",
"&vrlw (@x[$d2],@x[$d2],'$eight')",
"&vrlw (@x[$d3],@x[$d3],'$eight')",
"&vadduwm (@x[$c0],@x[$c0],@x[$d0])",
"&vadduwm (@x[$c1],@x[$c1],@x[$d1])",
"&vadduwm (@x[$c2],@x[$c2],@x[$d2])",
"&vadduwm (@x[$c3],@x[$c3],@x[$d3])",
"&vxor (@x[$b0],@x[$b0],@x[$c0])",
"&vxor (@x[$b1],@x[$b1],@x[$c1])",
"&vxor (@x[$b2],@x[$b2],@x[$c2])",
"&vxor (@x[$b3],@x[$b3],@x[$c3])",
"&vrlw (@x[$b0],@x[$b0],'$seven')",
"&vrlw (@x[$b1],@x[$b1],'$seven')",
"&vrlw (@x[$b2],@x[$b2],'$seven')",
"&vrlw (@x[$b3],@x[$b3],'$seven')"
);
}
$code.=<<___;
.globl .ChaCha20_ctr32_vsx_p10
.align 5
.ChaCha20_ctr32_vsx_p10:
${UCMP}i $len,255
ble .Not_greater_than_8x
b ChaCha20_ctr32_vsx_8x
.Not_greater_than_8x:
$STU $sp,-$FRAME($sp)
mflr r0
li r10,`15+$LOCALS+64`
li r11,`31+$LOCALS+64`
mfspr r12,256
stvx v26,r10,$sp
addi r10,r10,32
stvx v27,r11,$sp
addi r11,r11,32
stvx v28,r10,$sp
addi r10,r10,32
stvx v29,r11,$sp
addi r11,r11,32
stvx v30,r10,$sp
stvx v31,r11,$sp
stw r12,`$FRAME-4`($sp) # save vrsave
li r12,-4096+63
$PUSH r0, `$FRAME+$LRSAVE`($sp)
mtspr 256,r12 # preserve 29 AltiVec registers
bl Lconsts # returns pointer Lsigma in r12
lvx_4w @K[0],0,r12 # load sigma
addi r12,r12,0x70
li $x10,16
li $x20,32
li $x30,48
li r11,64
lvx_4w @K[1],0,$key # load key
lvx_4w @K[2],$x10,$key
lvx_4w @K[3],0,$ctr # load counter
vxor $xt0,$xt0,$xt0
lvx_4w $xt1,r11,r12
vspltw $CTR,@K[3],0
vsldoi @K[3],@K[3],$xt0,4
vsldoi @K[3],$xt0,@K[3],12 # clear @K[3].word[0]
vadduwm $CTR,$CTR,$xt1
be?lvsl $beperm,0,$x10 # 0x00..0f
be?vspltisb $xt0,3 # 0x03..03
be?vxor $beperm,$beperm,$xt0 # swap bytes within words
li r0,10 # inner loop counter
mtctr r0
b Loop_outer_vsx
.align 5
Loop_outer_vsx:
lvx $xa0,$x00,r12 # load [smashed] sigma
lvx $xa1,$x10,r12
lvx $xa2,$x20,r12
lvx $xa3,$x30,r12
vspltw $xb0,@K[1],0 # smash the key
vspltw $xb1,@K[1],1
vspltw $xb2,@K[1],2
vspltw $xb3,@K[1],3
vspltw $xc0,@K[2],0
vspltw $xc1,@K[2],1
vspltw $xc2,@K[2],2
vspltw $xc3,@K[2],3
vmr $xd0,$CTR # smash the counter
vspltw $xd1,@K[3],1
vspltw $xd2,@K[3],2
vspltw $xd3,@K[3],3
vspltisw $sixteen,-16 # synthesize constants
vspltisw $twelve,12
vspltisw $eight,8
vspltisw $seven,7
Loop_vsx_4x:
___
foreach (&VSX_lane_ROUND_4x(0, 4, 8,12)) { eval; }
foreach (&VSX_lane_ROUND_4x(0, 5,10,15)) { eval; }
$code.=<<___;
bdnz Loop_vsx_4x
vadduwm $xd0,$xd0,$CTR
vmrgew $xt0,$xa0,$xa1 # transpose data
vmrgew $xt1,$xa2,$xa3
vmrgow $xa0,$xa0,$xa1
vmrgow $xa2,$xa2,$xa3
vmrgew $xt2,$xb0,$xb1
vmrgew $xt3,$xb2,$xb3
vpermdi $xa1,$xa0,$xa2,0b00
vpermdi $xa3,$xa0,$xa2,0b11
vpermdi $xa0,$xt0,$xt1,0b00
vpermdi $xa2,$xt0,$xt1,0b11
vmrgow $xb0,$xb0,$xb1
vmrgow $xb2,$xb2,$xb3
vmrgew $xt0,$xc0,$xc1
vmrgew $xt1,$xc2,$xc3
vpermdi $xb1,$xb0,$xb2,0b00
vpermdi $xb3,$xb0,$xb2,0b11
vpermdi $xb0,$xt2,$xt3,0b00
vpermdi $xb2,$xt2,$xt3,0b11
vmrgow $xc0,$xc0,$xc1
vmrgow $xc2,$xc2,$xc3
vmrgew $xt2,$xd0,$xd1
vmrgew $xt3,$xd2,$xd3
vpermdi $xc1,$xc0,$xc2,0b00
vpermdi $xc3,$xc0,$xc2,0b11
vpermdi $xc0,$xt0,$xt1,0b00
vpermdi $xc2,$xt0,$xt1,0b11
vmrgow $xd0,$xd0,$xd1
vmrgow $xd2,$xd2,$xd3
vspltisw $xt0,4
vadduwm $CTR,$CTR,$xt0 # next counter value
vpermdi $xd1,$xd0,$xd2,0b00
vpermdi $xd3,$xd0,$xd2,0b11
vpermdi $xd0,$xt2,$xt3,0b00
vpermdi $xd2,$xt2,$xt3,0b11
vadduwm $xa0,$xa0,@K[0]
vadduwm $xb0,$xb0,@K[1]
vadduwm $xc0,$xc0,@K[2]
vadduwm $xd0,$xd0,@K[3]
be?vperm $xa0,$xa0,$xa0,$beperm
be?vperm $xb0,$xb0,$xb0,$beperm
be?vperm $xc0,$xc0,$xc0,$beperm
be?vperm $xd0,$xd0,$xd0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx
lvx_4w $xt0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xt0,$xt0,$xa0
vxor $xt1,$xt1,$xb0
vxor $xt2,$xt2,$xc0
vxor $xt3,$xt3,$xd0
stvx_4w $xt0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx
vadduwm $xa0,$xa1,@K[0]
vadduwm $xb0,$xb1,@K[1]
vadduwm $xc0,$xc1,@K[2]
vadduwm $xd0,$xd1,@K[3]
be?vperm $xa0,$xa0,$xa0,$beperm
be?vperm $xb0,$xb0,$xb0,$beperm
be?vperm $xc0,$xc0,$xc0,$beperm
be?vperm $xd0,$xd0,$xd0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx
lvx_4w $xt0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xt0,$xt0,$xa0
vxor $xt1,$xt1,$xb0
vxor $xt2,$xt2,$xc0
vxor $xt3,$xt3,$xd0
stvx_4w $xt0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx
vadduwm $xa0,$xa2,@K[0]
vadduwm $xb0,$xb2,@K[1]
vadduwm $xc0,$xc2,@K[2]
vadduwm $xd0,$xd2,@K[3]
be?vperm $xa0,$xa0,$xa0,$beperm
be?vperm $xb0,$xb0,$xb0,$beperm
be?vperm $xc0,$xc0,$xc0,$beperm
be?vperm $xd0,$xd0,$xd0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx
lvx_4w $xt0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xt0,$xt0,$xa0
vxor $xt1,$xt1,$xb0
vxor $xt2,$xt2,$xc0
vxor $xt3,$xt3,$xd0
stvx_4w $xt0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx
vadduwm $xa0,$xa3,@K[0]
vadduwm $xb0,$xb3,@K[1]
vadduwm $xc0,$xc3,@K[2]
vadduwm $xd0,$xd3,@K[3]
be?vperm $xa0,$xa0,$xa0,$beperm
be?vperm $xb0,$xb0,$xb0,$beperm
be?vperm $xc0,$xc0,$xc0,$beperm
be?vperm $xd0,$xd0,$xd0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx
lvx_4w $xt0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xt0,$xt0,$xa0
vxor $xt1,$xt1,$xb0
vxor $xt2,$xt2,$xc0
vxor $xt3,$xt3,$xd0
stvx_4w $xt0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
mtctr r0
bne Loop_outer_vsx
Ldone_vsx:
lwz r12,`$FRAME-4`($sp) # pull vrsave
li r10,`15+$LOCALS+64`
li r11,`31+$LOCALS+64`
$POP r0, `$FRAME+$LRSAVE`($sp)
mtspr 256,r12 # restore vrsave
lvx v26,r10,$sp
addi r10,r10,32
lvx v27,r11,$sp
addi r11,r11,32
lvx v28,r10,$sp
addi r10,r10,32
lvx v29,r11,$sp
addi r11,r11,32
lvx v30,r10,$sp
lvx v31,r11,$sp
mtlr r0
addi $sp,$sp,$FRAME
blr
.align 4
Ltail_vsx:
addi r11,$sp,$LOCALS
mtctr $len
stvx_4w $xa0,$x00,r11 # offload block to stack
stvx_4w $xb0,$x10,r11
stvx_4w $xc0,$x20,r11
stvx_4w $xd0,$x30,r11
subi r12,r11,1 # prepare for *++ptr
subi $inp,$inp,1
subi $out,$out,1
Loop_tail_vsx:
lbzu r6,1(r12)
lbzu r7,1($inp)
xor r6,r6,r7
stbu r6,1($out)
bdnz Loop_tail_vsx
stvx_4w $K[0],$x00,r11 # wipe copy of the block
stvx_4w $K[0],$x10,r11
stvx_4w $K[0],$x20,r11
stvx_4w $K[0],$x30,r11
b Ldone_vsx
.long 0
.byte 0,12,0x04,1,0x80,0,5,0
.long 0
.size .ChaCha20_ctr32_vsx_p10,.-.ChaCha20_ctr32_vsx_p10
___
}}}
##This is 8 block in parallel implementation. The heart of chacha round uses vector instruction that has access to
# vsr[32+X]. To perform the 8 parallel block we tend to use all 32 register to hold the 8 block info.
# WE need to store few register value on side, so we can use VSR{32+X} for few vector instructions used in round op and hold intermediate value.
# WE use the VSR[0]-VSR[31] for holding intermediate value and perform 8 block in parallel.
#
{{{
#### ($out,$inp,$len,$key,$ctr) = map("r$_",(3..7));
my ($xa0,$xa1,$xa2,$xa3, $xb0,$xb1,$xb2,$xb3,
$xc0,$xc1,$xc2,$xc3, $xd0,$xd1,$xd2,$xd3,
$xa4,$xa5,$xa6,$xa7, $xb4,$xb5,$xb6,$xb7,
$xc4,$xc5,$xc6,$xc7, $xd4,$xd5,$xd6,$xd7) = map("v$_",(0..31));
my ($xcn4,$xcn5,$xcn6,$xcn7, $xdn4,$xdn5,$xdn6,$xdn7) = map("v$_",(8..15));
my ($xan0,$xbn0,$xcn0,$xdn0) = map("v$_",(0..3));
my @K = map("v$_",27,(24..26));
my ($xt0,$xt1,$xt2,$xt3,$xt4) = map("v$_",23,(28..31));
my $xr0 = "v4";
my $CTR0 = "v22";
my $CTR1 = "v5";
my $beperm = "v31";
my ($x00,$x10,$x20,$x30) = (0, map("r$_",(8..10)));
my ($xv0,$xv1,$xv2,$xv3,$xv4,$xv5,$xv6,$xv7) = map("v$_",(0..7));
my ($xv8,$xv9,$xv10,$xv11,$xv12,$xv13,$xv14,$xv15,$xv16,$xv17) = map("v$_",(8..17));
my ($xv18,$xv19,$xv20,$xv21) = map("v$_",(18..21));
my ($xv22,$xv23,$xv24,$xv25,$xv26) = map("v$_",(22..26));
my $FRAME=$LOCALS+64+9*16; # 8*16 is for v24-v31 offload
sub VSX_lane_ROUND_8x {
my ($a0,$b0,$c0,$d0,$a4,$b4,$c4,$d4)=@_;
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 ($a5,$b5,$c5,$d5)=map(($_&~3)+(($_+1)&3),($a4,$b4,$c4,$d4));
my ($a6,$b6,$c6,$d6)=map(($_&~3)+(($_+1)&3),($a5,$b5,$c5,$d5));
my ($a7,$b7,$c7,$d7)=map(($_&~3)+(($_+1)&3),($a6,$b6,$c6,$d6));
my ($xv8,$xv9,$xv10,$xv11,$xv12,$xv13,$xv14,$xv15,$xv16,$xv17) = map("\"v$_\"",(8..17));
my @x=map("\"v$_\"",(0..31));
(
"&vxxlor ($xv15 ,@x[$c7],@x[$c7])", #copy v30 to v13
"&vxxlorc (@x[$c7], $xv9,$xv9)",
"&vadduwm (@x[$a0],@x[$a0],@x[$b0])", # Q1
"&vadduwm (@x[$a1],@x[$a1],@x[$b1])", # Q2
"&vadduwm (@x[$a2],@x[$a2],@x[$b2])", # Q3
"&vadduwm (@x[$a3],@x[$a3],@x[$b3])", # Q4
"&vadduwm (@x[$a4],@x[$a4],@x[$b4])", # Q1
"&vadduwm (@x[$a5],@x[$a5],@x[$b5])", # Q2
"&vadduwm (@x[$a6],@x[$a6],@x[$b6])", # Q3
"&vadduwm (@x[$a7],@x[$a7],@x[$b7])", # Q4
"&vxor (@x[$d0],@x[$d0],@x[$a0])",
"&vxor (@x[$d1],@x[$d1],@x[$a1])",
"&vxor (@x[$d2],@x[$d2],@x[$a2])",
"&vxor (@x[$d3],@x[$d3],@x[$a3])",
"&vxor (@x[$d4],@x[$d4],@x[$a4])",
"&vxor (@x[$d5],@x[$d5],@x[$a5])",
"&vxor (@x[$d6],@x[$d6],@x[$a6])",
"&vxor (@x[$d7],@x[$d7],@x[$a7])",
"&vrlw (@x[$d0],@x[$d0],@x[$c7])",
"&vrlw (@x[$d1],@x[$d1],@x[$c7])",
"&vrlw (@x[$d2],@x[$d2],@x[$c7])",
"&vrlw (@x[$d3],@x[$d3],@x[$c7])",
"&vrlw (@x[$d4],@x[$d4],@x[$c7])",
"&vrlw (@x[$d5],@x[$d5],@x[$c7])",
"&vrlw (@x[$d6],@x[$d6],@x[$c7])",
"&vrlw (@x[$d7],@x[$d7],@x[$c7])",
"&vxxlor ($xv13 ,@x[$a7],@x[$a7])",
"&vxxlorc (@x[$c7], $xv15,$xv15)",
"&vxxlorc (@x[$a7], $xv10,$xv10)",
"&vadduwm (@x[$c0],@x[$c0],@x[$d0])",
"&vadduwm (@x[$c1],@x[$c1],@x[$d1])",
"&vadduwm (@x[$c2],@x[$c2],@x[$d2])",
"&vadduwm (@x[$c3],@x[$c3],@x[$d3])",
"&vadduwm (@x[$c4],@x[$c4],@x[$d4])",
"&vadduwm (@x[$c5],@x[$c5],@x[$d5])",
"&vadduwm (@x[$c6],@x[$c6],@x[$d6])",
"&vadduwm (@x[$c7],@x[$c7],@x[$d7])",
"&vxor (@x[$b0],@x[$b0],@x[$c0])",
"&vxor (@x[$b1],@x[$b1],@x[$c1])",
"&vxor (@x[$b2],@x[$b2],@x[$c2])",
"&vxor (@x[$b3],@x[$b3],@x[$c3])",
"&vxor (@x[$b4],@x[$b4],@x[$c4])",
"&vxor (@x[$b5],@x[$b5],@x[$c5])",
"&vxor (@x[$b6],@x[$b6],@x[$c6])",
"&vxor (@x[$b7],@x[$b7],@x[$c7])",
"&vrlw (@x[$b0],@x[$b0],@x[$a7])",
"&vrlw (@x[$b1],@x[$b1],@x[$a7])",
"&vrlw (@x[$b2],@x[$b2],@x[$a7])",
"&vrlw (@x[$b3],@x[$b3],@x[$a7])",
"&vrlw (@x[$b4],@x[$b4],@x[$a7])",
"&vrlw (@x[$b5],@x[$b5],@x[$a7])",
"&vrlw (@x[$b6],@x[$b6],@x[$a7])",
"&vrlw (@x[$b7],@x[$b7],@x[$a7])",
"&vxxlorc (@x[$a7], $xv13,$xv13)",
"&vxxlor ($xv15 ,@x[$c7],@x[$c7])",
"&vxxlorc (@x[$c7], $xv11,$xv11)",
"&vadduwm (@x[$a0],@x[$a0],@x[$b0])",
"&vadduwm (@x[$a1],@x[$a1],@x[$b1])",
"&vadduwm (@x[$a2],@x[$a2],@x[$b2])",
"&vadduwm (@x[$a3],@x[$a3],@x[$b3])",
"&vadduwm (@x[$a4],@x[$a4],@x[$b4])",
"&vadduwm (@x[$a5],@x[$a5],@x[$b5])",
"&vadduwm (@x[$a6],@x[$a6],@x[$b6])",
"&vadduwm (@x[$a7],@x[$a7],@x[$b7])",
"&vxor (@x[$d0],@x[$d0],@x[$a0])",
"&vxor (@x[$d1],@x[$d1],@x[$a1])",
"&vxor (@x[$d2],@x[$d2],@x[$a2])",
"&vxor (@x[$d3],@x[$d3],@x[$a3])",
"&vxor (@x[$d4],@x[$d4],@x[$a4])",
"&vxor (@x[$d5],@x[$d5],@x[$a5])",
"&vxor (@x[$d6],@x[$d6],@x[$a6])",
"&vxor (@x[$d7],@x[$d7],@x[$a7])",
"&vrlw (@x[$d0],@x[$d0],@x[$c7])",
"&vrlw (@x[$d1],@x[$d1],@x[$c7])",
"&vrlw (@x[$d2],@x[$d2],@x[$c7])",
"&vrlw (@x[$d3],@x[$d3],@x[$c7])",
"&vrlw (@x[$d4],@x[$d4],@x[$c7])",
"&vrlw (@x[$d5],@x[$d5],@x[$c7])",
"&vrlw (@x[$d6],@x[$d6],@x[$c7])",
"&vrlw (@x[$d7],@x[$d7],@x[$c7])",
"&vxxlorc (@x[$c7], $xv15,$xv15)",
"&vxxlor ($xv13 ,@x[$a7],@x[$a7])",
"&vxxlorc (@x[$a7], $xv12,$xv12)",
"&vadduwm (@x[$c0],@x[$c0],@x[$d0])",
"&vadduwm (@x[$c1],@x[$c1],@x[$d1])",
"&vadduwm (@x[$c2],@x[$c2],@x[$d2])",
"&vadduwm (@x[$c3],@x[$c3],@x[$d3])",
"&vadduwm (@x[$c4],@x[$c4],@x[$d4])",
"&vadduwm (@x[$c5],@x[$c5],@x[$d5])",
"&vadduwm (@x[$c6],@x[$c6],@x[$d6])",
"&vadduwm (@x[$c7],@x[$c7],@x[$d7])",
"&vxor (@x[$b0],@x[$b0],@x[$c0])",
"&vxor (@x[$b1],@x[$b1],@x[$c1])",
"&vxor (@x[$b2],@x[$b2],@x[$c2])",
"&vxor (@x[$b3],@x[$b3],@x[$c3])",
"&vxor (@x[$b4],@x[$b4],@x[$c4])",
"&vxor (@x[$b5],@x[$b5],@x[$c5])",
"&vxor (@x[$b6],@x[$b6],@x[$c6])",
"&vxor (@x[$b7],@x[$b7],@x[$c7])",
"&vrlw (@x[$b0],@x[$b0],@x[$a7])",
"&vrlw (@x[$b1],@x[$b1],@x[$a7])",
"&vrlw (@x[$b2],@x[$b2],@x[$a7])",
"&vrlw (@x[$b3],@x[$b3],@x[$a7])",
"&vrlw (@x[$b4],@x[$b4],@x[$a7])",
"&vrlw (@x[$b5],@x[$b5],@x[$a7])",
"&vrlw (@x[$b6],@x[$b6],@x[$a7])",
"&vrlw (@x[$b7],@x[$b7],@x[$a7])",
"&vxxlorc (@x[$a7], $xv13,$xv13)",
);
}
$code.=<<___;
.globl .ChaCha20_ctr32_vsx_8x
.align 5
.ChaCha20_ctr32_vsx_8x:
$STU $sp,-$FRAME($sp)
mflr r0
li r10,`15+$LOCALS+64`
li r11,`31+$LOCALS+64`
mfspr r12,256
stvx v24,r10,$sp
addi r10,r10,32
stvx v25,r11,$sp
addi r11,r11,32
stvx v26,r10,$sp
addi r10,r10,32
stvx v27,r11,$sp
addi r11,r11,32
stvx v28,r10,$sp
addi r10,r10,32
stvx v29,r11,$sp
addi r11,r11,32
stvx v30,r10,$sp
stvx v31,r11,$sp
stw r12,`$FRAME-4`($sp) # save vrsave
li r12,-4096+63
$PUSH r0, `$FRAME+$LRSAVE`($sp)
mtspr 256,r12 # preserve 29 AltiVec registers
bl Lconsts # returns pointer Lsigma in r12
lvx_4w @K[0],0,r12 # load sigma
addi r12,r12,0x70
li $x10,16
li $x20,32
li $x30,48
li r11,64
vspltisw $xa4,-16 # synthesize constants
vspltisw $xb4,12 # synthesize constants
vspltisw $xc4,8 # synthesize constants
vspltisw $xd4,7 # synthesize constants
lvx $xa0,$x00,r12 # load [smashed] sigma
lvx $xa1,$x10,r12
lvx $xa2,$x20,r12
lvx $xa3,$x30,r12
vxxlor $xv9 ,$xa4,$xa4 #save shift val in vr9-12
vxxlor $xv10 ,$xb4,$xb4
vxxlor $xv11 ,$xc4,$xc4
vxxlor $xv12 ,$xd4,$xd4
vxxlor $xv22 ,$xa0,$xa0 #save sigma in vr22-25
vxxlor $xv23 ,$xa1,$xa1
vxxlor $xv24 ,$xa2,$xa2
vxxlor $xv25 ,$xa3,$xa3
lvx_4w @K[1],0,$key # load key
lvx_4w @K[2],$x10,$key
lvx_4w @K[3],0,$ctr # load counter
vspltisw $xt3,4
vxor $xt2,$xt2,$xt2
lvx_4w $xt1,r11,r12
vspltw $xa2,@K[3],0 #save the original count after spltw
vsldoi @K[3],@K[3],$xt2,4
vsldoi @K[3],$xt2,@K[3],12 # clear @K[3].word[0]
vadduwm $xt1,$xa2,$xt1
vadduwm $xt3,$xt1,$xt3 # next counter value
vspltw $xa0,@K[2],2 # save the K[2] spltw 2 and save v8.
be?lvsl $beperm,0,$x10 # 0x00..0f
be?vspltisb $xt0,3 # 0x03..03
be?vxor $beperm,$beperm,$xt0 # swap bytes within words
be?vxxlor $xv26 ,$beperm,$beperm
vxxlor $xv0 ,@K[0],@K[0] # K0,k1,k2 to vr0,1,2
vxxlor $xv1 ,@K[1],@K[1]
vxxlor $xv2 ,@K[2],@K[2]
vxxlor $xv3 ,@K[3],@K[3]
vxxlor $xv4 ,$xt1,$xt1 #CTR ->4, CTR+4-> 5
vxxlor $xv5 ,$xt3,$xt3
vxxlor $xv8 ,$xa0,$xa0
li r0,10 # inner loop counter
mtctr r0
b Loop_outer_vsx_8x
.align 5
Loop_outer_vsx_8x:
vxxlorc $xa0,$xv22,$xv22 # load [smashed] sigma
vxxlorc $xa1,$xv23,$xv23
vxxlorc $xa2,$xv24,$xv24
vxxlorc $xa3,$xv25,$xv25
vxxlorc $xa4,$xv22,$xv22
vxxlorc $xa5,$xv23,$xv23
vxxlorc $xa6,$xv24,$xv24
vxxlorc $xa7,$xv25,$xv25
vspltw $xb0,@K[1],0 # smash the key
vspltw $xb1,@K[1],1
vspltw $xb2,@K[1],2
vspltw $xb3,@K[1],3
vspltw $xb4,@K[1],0 # smash the key
vspltw $xb5,@K[1],1
vspltw $xb6,@K[1],2
vspltw $xb7,@K[1],3
vspltw $xc0,@K[2],0
vspltw $xc1,@K[2],1
vspltw $xc2,@K[2],2
vspltw $xc3,@K[2],3
vspltw $xc4,@K[2],0
vspltw $xc7,@K[2],3
vspltw $xc5,@K[2],1
vxxlorc $xd0,$xv4,$xv4 # smash the counter
vspltw $xd1,@K[3],1
vspltw $xd2,@K[3],2
vspltw $xd3,@K[3],3
vxxlorc $xd4,$xv5,$xv5 # smash the counter
vspltw $xd5,@K[3],1
vspltw $xd6,@K[3],2
vspltw $xd7,@K[3],3
vxxlorc $xc6,$xv8,$xv8 #copy of vlspt k[2],2 is in v8.v26 ->k[3] so need to wait until k3 is done
Loop_vsx_8x:
___
foreach (&VSX_lane_ROUND_8x(0,4, 8,12,16,20,24,28)) { eval; }
foreach (&VSX_lane_ROUND_8x(0,5,10,15,16,21,26,31)) { eval; }
$code.=<<___;
bdnz Loop_vsx_8x
vxxlor $xv13 ,$xd4,$xd4 # save the register vr24-31
vxxlor $xv14 ,$xd5,$xd5 #
vxxlor $xv15 ,$xd6,$xd6 #
vxxlor $xv16 ,$xd7,$xd7 #
vxxlor $xv18 ,$xc4,$xc4 #
vxxlor $xv19 ,$xc5,$xc5 #
vxxlor $xv20 ,$xc6,$xc6 #
vxxlor $xv21 ,$xc7,$xc7 #
vxxlor $xv6 ,$xb6,$xb6 # save vr23, so we get 8 regs
vxxlor $xv7 ,$xb7,$xb7 # save vr23, so we get 8 regs
be?vxxlorc $beperm,$xv26,$xv26 # copy back the beperm.
vxxlorc @K[0],$xv0,$xv0 #27
vxxlorc @K[1],$xv1,$xv1 #24
vxxlorc @K[2],$xv2,$xv2 #25
vxxlorc @K[3],$xv3,$xv3 #26
vxxlorc $CTR0,$xv4,$xv4
###changing to vertical
vmrgew $xt0,$xa0,$xa1 # transpose data
vmrgew $xt1,$xa2,$xa3
vmrgow $xa0,$xa0,$xa1
vmrgow $xa2,$xa2,$xa3
vmrgew $xt2,$xb0,$xb1
vmrgew $xt3,$xb2,$xb3
vmrgow $xb0,$xb0,$xb1
vmrgow $xb2,$xb2,$xb3
vadduwm $xd0,$xd0,$CTR0
vpermdi $xa1,$xa0,$xa2,0b00
vpermdi $xa3,$xa0,$xa2,0b11
vpermdi $xa0,$xt0,$xt1,0b00
vpermdi $xa2,$xt0,$xt1,0b11
vpermdi $xb1,$xb0,$xb2,0b00
vpermdi $xb3,$xb0,$xb2,0b11
vpermdi $xb0,$xt2,$xt3,0b00
vpermdi $xb2,$xt2,$xt3,0b11
vmrgew $xt0,$xc0,$xc1
vmrgew $xt1,$xc2,$xc3
vmrgow $xc0,$xc0,$xc1
vmrgow $xc2,$xc2,$xc3
vmrgew $xt2,$xd0,$xd1
vmrgew $xt3,$xd2,$xd3
vmrgow $xd0,$xd0,$xd1
vmrgow $xd2,$xd2,$xd3
vpermdi $xc1,$xc0,$xc2,0b00
vpermdi $xc3,$xc0,$xc2,0b11
vpermdi $xc0,$xt0,$xt1,0b00
vpermdi $xc2,$xt0,$xt1,0b11
vpermdi $xd1,$xd0,$xd2,0b00
vpermdi $xd3,$xd0,$xd2,0b11
vpermdi $xd0,$xt2,$xt3,0b00
vpermdi $xd2,$xt2,$xt3,0b11
vspltisw $xt0,8
vadduwm $CTR0,$CTR0,$xt0 # next counter value
vxxlor $xv4 ,$CTR0,$CTR0 #CTR+4-> 5
vadduwm $xa0,$xa0,@K[0]
vadduwm $xb0,$xb0,@K[1]
vadduwm $xc0,$xc0,@K[2]
vadduwm $xd0,$xd0,@K[3]
be?vperm $xa0,$xa0,$xa0,$beperm
be?vperm $xb0,$xb0,$xb0,$beperm
be?vperm $xc0,$xc0,$xc0,$beperm
be?vperm $xd0,$xd0,$xd0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx_8x
lvx_4w $xt0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xt0,$xt0,$xa0
vxor $xt1,$xt1,$xb0
vxor $xt2,$xt2,$xc0
vxor $xt3,$xt3,$xd0
stvx_4w $xt0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx_8x
vadduwm $xa0,$xa1,@K[0]
vadduwm $xb0,$xb1,@K[1]
vadduwm $xc0,$xc1,@K[2]
vadduwm $xd0,$xd1,@K[3]
be?vperm $xa0,$xa0,$xa0,$beperm
be?vperm $xb0,$xb0,$xb0,$beperm
be?vperm $xc0,$xc0,$xc0,$beperm
be?vperm $xd0,$xd0,$xd0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx_8x
lvx_4w $xt0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xt0,$xt0,$xa0
vxor $xt1,$xt1,$xb0
vxor $xt2,$xt2,$xc0
vxor $xt3,$xt3,$xd0
stvx_4w $xt0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx_8x
vadduwm $xa0,$xa2,@K[0]
vadduwm $xb0,$xb2,@K[1]
vadduwm $xc0,$xc2,@K[2]
vadduwm $xd0,$xd2,@K[3]
be?vperm $xa0,$xa0,$xa0,$beperm
be?vperm $xb0,$xb0,$xb0,$beperm
be?vperm $xc0,$xc0,$xc0,$beperm
be?vperm $xd0,$xd0,$xd0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx_8x
lvx_4w $xt0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xt0,$xt0,$xa0
vxor $xt1,$xt1,$xb0
vxor $xt2,$xt2,$xc0
vxor $xt3,$xt3,$xd0
stvx_4w $xt0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx_8x
vadduwm $xa0,$xa3,@K[0]
vadduwm $xb0,$xb3,@K[1]
vadduwm $xc0,$xc3,@K[2]
vadduwm $xd0,$xd3,@K[3]
be?vperm $xa0,$xa0,$xa0,$beperm
be?vperm $xb0,$xb0,$xb0,$beperm
be?vperm $xc0,$xc0,$xc0,$beperm
be?vperm $xd0,$xd0,$xd0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx_8x
lvx_4w $xt0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xt0,$xt0,$xa0
vxor $xt1,$xt1,$xb0
vxor $xt2,$xt2,$xc0
vxor $xt3,$xt3,$xd0
stvx_4w $xt0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx_8x
#blk4-7: 24:31 remain the same as we can use the same logic above . Reg a4-b7 remain same.Load c4,d7--> position 8-15.we can reuse vr24-31.
#VR0-3 : are used to load temp value, vr4 --> as xr0 instead of xt0.
vxxlorc $CTR1 ,$xv5,$xv5
vxxlorc $xcn4 ,$xv18,$xv18
vxxlorc $xcn5 ,$xv19,$xv19
vxxlorc $xcn6 ,$xv20,$xv20
vxxlorc $xcn7 ,$xv21,$xv21
vxxlorc $xdn4 ,$xv13,$xv13
vxxlorc $xdn5 ,$xv14,$xv14
vxxlorc $xdn6 ,$xv15,$xv15
vxxlorc $xdn7 ,$xv16,$xv16
vadduwm $xdn4,$xdn4,$CTR1
vxxlorc $xb6 ,$xv6,$xv6
vxxlorc $xb7 ,$xv7,$xv7
#use xa1->xr0, as xt0...in the block 4-7
vmrgew $xr0,$xa4,$xa5 # transpose data
vmrgew $xt1,$xa6,$xa7
vmrgow $xa4,$xa4,$xa5
vmrgow $xa6,$xa6,$xa7
vmrgew $xt2,$xb4,$xb5
vmrgew $xt3,$xb6,$xb7
vmrgow $xb4,$xb4,$xb5
vmrgow $xb6,$xb6,$xb7
vpermdi $xa5,$xa4,$xa6,0b00
vpermdi $xa7,$xa4,$xa6,0b11
vpermdi $xa4,$xr0,$xt1,0b00
vpermdi $xa6,$xr0,$xt1,0b11
vpermdi $xb5,$xb4,$xb6,0b00
vpermdi $xb7,$xb4,$xb6,0b11
vpermdi $xb4,$xt2,$xt3,0b00
vpermdi $xb6,$xt2,$xt3,0b11
vmrgew $xr0,$xcn4,$xcn5
vmrgew $xt1,$xcn6,$xcn7
vmrgow $xcn4,$xcn4,$xcn5
vmrgow $xcn6,$xcn6,$xcn7
vmrgew $xt2,$xdn4,$xdn5
vmrgew $xt3,$xdn6,$xdn7
vmrgow $xdn4,$xdn4,$xdn5
vmrgow $xdn6,$xdn6,$xdn7
vpermdi $xcn5,$xcn4,$xcn6,0b00
vpermdi $xcn7,$xcn4,$xcn6,0b11
vpermdi $xcn4,$xr0,$xt1,0b00
vpermdi $xcn6,$xr0,$xt1,0b11
vpermdi $xdn5,$xdn4,$xdn6,0b00
vpermdi $xdn7,$xdn4,$xdn6,0b11
vpermdi $xdn4,$xt2,$xt3,0b00
vpermdi $xdn6,$xt2,$xt3,0b11
vspltisw $xr0,8
vadduwm $CTR1,$CTR1,$xr0 # next counter value
vxxlor $xv5 ,$CTR1,$CTR1 #CTR+4-> 5
vadduwm $xan0,$xa4,@K[0]
vadduwm $xbn0,$xb4,@K[1]
vadduwm $xcn0,$xcn4,@K[2]
vadduwm $xdn0,$xdn4,@K[3]
be?vperm $xan0,$xan0,$xan0,$beperm
be?vperm $xbn0,$xbn0,$xbn0,$beperm
be?vperm $xcn0,$xcn0,$xcn0,$beperm
be?vperm $xdn0,$xdn0,$xdn0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx_8x_1
lvx_4w $xr0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xr0,$xr0,$xan0
vxor $xt1,$xt1,$xbn0
vxor $xt2,$xt2,$xcn0
vxor $xt3,$xt3,$xdn0
stvx_4w $xr0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx_8x
vadduwm $xan0,$xa5,@K[0]
vadduwm $xbn0,$xb5,@K[1]
vadduwm $xcn0,$xcn5,@K[2]
vadduwm $xdn0,$xdn5,@K[3]
be?vperm $xan0,$xan0,$xan0,$beperm
be?vperm $xbn0,$xbn0,$xbn0,$beperm
be?vperm $xcn0,$xcn0,$xcn0,$beperm
be?vperm $xdn0,$xdn0,$xdn0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx_8x_1
lvx_4w $xr0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xr0,$xr0,$xan0
vxor $xt1,$xt1,$xbn0
vxor $xt2,$xt2,$xcn0
vxor $xt3,$xt3,$xdn0
stvx_4w $xr0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx_8x
vadduwm $xan0,$xa6,@K[0]
vadduwm $xbn0,$xb6,@K[1]
vadduwm $xcn0,$xcn6,@K[2]
vadduwm $xdn0,$xdn6,@K[3]
be?vperm $xan0,$xan0,$xan0,$beperm
be?vperm $xbn0,$xbn0,$xbn0,$beperm
be?vperm $xcn0,$xcn0,$xcn0,$beperm
be?vperm $xdn0,$xdn0,$xdn0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx_8x_1
lvx_4w $xr0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xr0,$xr0,$xan0
vxor $xt1,$xt1,$xbn0
vxor $xt2,$xt2,$xcn0
vxor $xt3,$xt3,$xdn0
stvx_4w $xr0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx_8x
vadduwm $xan0,$xa7,@K[0]
vadduwm $xbn0,$xb7,@K[1]
vadduwm $xcn0,$xcn7,@K[2]
vadduwm $xdn0,$xdn7,@K[3]
be?vperm $xan0,$xan0,$xan0,$beperm
be?vperm $xbn0,$xbn0,$xbn0,$beperm
be?vperm $xcn0,$xcn0,$xcn0,$beperm
be?vperm $xdn0,$xdn0,$xdn0,$beperm
${UCMP}i $len,0x40
blt Ltail_vsx_8x_1
lvx_4w $xr0,$x00,$inp
lvx_4w $xt1,$x10,$inp
lvx_4w $xt2,$x20,$inp
lvx_4w $xt3,$x30,$inp
vxor $xr0,$xr0,$xan0
vxor $xt1,$xt1,$xbn0
vxor $xt2,$xt2,$xcn0
vxor $xt3,$xt3,$xdn0
stvx_4w $xr0,$x00,$out
stvx_4w $xt1,$x10,$out
addi $inp,$inp,0x40
stvx_4w $xt2,$x20,$out
subi $len,$len,0x40
stvx_4w $xt3,$x30,$out
addi $out,$out,0x40
beq Ldone_vsx_8x
mtctr r0
bne Loop_outer_vsx_8x
Ldone_vsx_8x:
lwz r12,`$FRAME-4`($sp) # pull vrsave
li r10,`15+$LOCALS+64`
li r11,`31+$LOCALS+64`
$POP r0, `$FRAME+$LRSAVE`($sp)
mtspr 256,r12 # restore vrsave
lvx v24,r10,$sp
addi r10,r10,32
lvx v25,r11,$sp
addi r11,r11,32
lvx v26,r10,$sp
addi r10,r10,32
lvx v27,r11,$sp
addi r11,r11,32
lvx v28,r10,$sp
addi r10,r10,32
lvx v29,r11,$sp
addi r11,r11,32
lvx v30,r10,$sp
lvx v31,r11,$sp
mtlr r0
addi $sp,$sp,$FRAME
blr
.align 4
Ltail_vsx_8x:
addi r11,$sp,$LOCALS
mtctr $len
stvx_4w $xa0,$x00,r11 # offload block to stack
stvx_4w $xb0,$x10,r11
stvx_4w $xc0,$x20,r11
stvx_4w $xd0,$x30,r11
subi r12,r11,1 # prepare for *++ptr
subi $inp,$inp,1
subi $out,$out,1
bl Loop_tail_vsx_8x
Ltail_vsx_8x_1:
addi r11,$sp,$LOCALS
mtctr $len
stvx_4w $xan0,$x00,r11 # offload block to stack
stvx_4w $xbn0,$x10,r11
stvx_4w $xcn0,$x20,r11
stvx_4w $xdn0,$x30,r11
subi r12,r11,1 # prepare for *++ptr
subi $inp,$inp,1
subi $out,$out,1
bl Loop_tail_vsx_8x
Loop_tail_vsx_8x:
lbzu r6,1(r12)
lbzu r7,1($inp)
xor r6,r6,r7
stbu r6,1($out)
bdnz Loop_tail_vsx_8x
stvx_4w $K[0],$x00,r11 # wipe copy of the block
stvx_4w $K[0],$x10,r11
stvx_4w $K[0],$x20,r11
stvx_4w $K[0],$x30,r11
b Ldone_vsx_8x
.long 0
.byte 0,12,0x04,1,0x80,0,5,0
.long 0
.size .ChaCha20_ctr32_vsx_8x,.-.ChaCha20_ctr32_vsx_8x
___
}}}
$code.=<<___;
.align 5
Lconsts:
mflr r0
bcl 20,31,\$+4
mflr r12 #vvvvv "distance between . and Lsigma
addi r12,r12,`64-8`
mtlr r0
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.space `64-9*4`
Lsigma:
.long 0x61707865,0x3320646e,0x79622d32,0x6b206574
.long 1,0,0,0
.long 2,0,0,0
.long 3,0,0,0
.long 4,0,0,0
___
$code.=<<___ if ($LITTLE_ENDIAN);
.long 0x0e0f0c0d,0x0a0b0809,0x06070405,0x02030001
.long 0x0d0e0f0c,0x090a0b08,0x05060704,0x01020300
___
$code.=<<___ if (!$LITTLE_ENDIAN); # flipped words
.long 0x02030001,0x06070405,0x0a0b0809,0x0e0f0c0d
.long 0x01020300,0x05060704,0x090a0b08,0x0d0e0f0c
___
$code.=<<___;
.long 0x61707865,0x61707865,0x61707865,0x61707865
.long 0x3320646e,0x3320646e,0x3320646e,0x3320646e
.long 0x79622d32,0x79622d32,0x79622d32,0x79622d32
.long 0x6b206574,0x6b206574,0x6b206574,0x6b206574
.long 0,1,2,3
.long 0x03020100,0x07060504,0x0b0a0908,0x0f0e0d0c
.asciz "ChaCha20 for PowerPC/AltiVec, CRYPTOGAMS by <appro\@openssl.org>"
.align 2
___
foreach (split("\n",$code)) {
s/\`([^\`]*)\`/eval $1/ge;
# instructions prefixed with '?' are endian-specific and need
# to be adjusted accordingly...
if ($flavour !~ /le$/) { # big-endian
s/be\?// or
s/le\?/#le#/ or
s/\?lvsr/lvsl/ or
s/\?lvsl/lvsr/ or
s/\?(vperm\s+v[0-9]+,\s*)(v[0-9]+,\s*)(v[0-9]+,\s*)(v[0-9]+)/$1$3$2$4/ or
s/vrldoi(\s+v[0-9]+,\s*)(v[0-9]+,)\s*([0-9]+)/vsldoi$1$2$2 16-$3/;
} else { # little-endian
s/le\?// or
s/be\?/#be#/ or
s/\?([a-z]+)/$1/ or
s/vrldoi(\s+v[0-9]+,\s*)(v[0-9]+,)\s*([0-9]+)/vsldoi$1$2$2 $3/;
}
print $_,"\n";
}
close STDOUT or die "error closing STDOUT: $!";
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