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#! /usr/bin/env perl
# Copyright 2021-2022 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 Amitay Isaacs <amitay@ozlabs.org> and Martin Schwenke
# <martin@meltin.net> for the OpenSSL project.
# ====================================================================
#
# p521 lower-level primitives for PPC64 using vector instructions.
#
use strict;
use warnings;
my $flavour = shift;
my $output = "";
while (($output=shift) && ($output!~/\w[\w\-]*\.\w+$/)) {}
if (!$output) {
$output = "-";
}
my ($xlate, $dir);
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
( $xlate="${dir}ppc-xlate.pl" and -f $xlate ) or
( $xlate="${dir}../../perlasm/ppc-xlate.pl" and -f $xlate) or
die "can't locate ppc-xlate.pl";
open OUT,"| \"$^X\" $xlate $flavour $output";
*STDOUT=*OUT;
my $code = "";
my ($sp, $outp, $savelr, $savesp) = ("r1", "r3", "r10", "r12");
my $vzero = "v32";
sub startproc($)
{
my ($name) = @_;
$code.=<<___;
.globl ${name}
.align 5
${name}:
___
}
sub endproc($)
{
my ($name) = @_;
$code.=<<___;
blr
.size ${name},.-${name}
___
}
sub push_vrs($$)
{
my ($min, $max) = @_;
my $count = $max - $min + 1;
$code.=<<___;
mr $savesp,$sp
stdu $sp,-16*`$count+1`($sp)
___
for (my $i = $min; $i <= $max; $i++) {
my $mult = $max - $i + 1;
$code.=<<___;
stxv $i,-16*$mult($savesp)
___
}
$code.=<<___;
___
}
sub pop_vrs($$)
{
my ($min, $max) = @_;
$code.=<<___;
ld $savesp,0($sp)
___
for (my $i = $min; $i <= $max; $i++) {
my $mult = $max - $i + 1;
$code.=<<___;
lxv $i,-16*$mult($savesp)
___
}
$code.=<<___;
mr $sp,$savesp
___
}
sub load_vrs($$)
{
my ($pointer, $reg_list) = @_;
for (my $i = 0; $i <= 8; $i++) {
my $offset = $i * 8;
$code.=<<___;
lxsd $reg_list->[$i],$offset($pointer)
___
}
$code.=<<___;
___
}
sub store_vrs($$)
{
my ($pointer, $reg_list) = @_;
for (my $i = 0; $i <= 8; $i++) {
my $offset = $i * 16;
$code.=<<___;
stxv $reg_list->[$i],$offset($pointer)
___
}
$code.=<<___;
___
}
$code.=<<___;
.text
___
{
# mul/square common
my ($t1, $t2, $t3, $t4) = ("v33", "v34", "v44", "v54");
my ($zero, $one) = ("r8", "r9");
my @out = map("v$_",(55..63));
{
#
# p521_felem_mul
#
my ($in1p, $in2p) = ("r4", "r5");
my @in1 = map("v$_",(45..53));
my @in2 = map("v$_",(35..43));
startproc("p521_felem_mul");
push_vrs(52, 63);
$code.=<<___;
vspltisw $vzero,0
___
load_vrs($in1p, \@in1);
load_vrs($in2p, \@in2);
$code.=<<___;
vmsumudm $out[0],$in1[0],$in2[0],$vzero
xxpermdi $t1,$in1[0],$in1[1],0b00
xxpermdi $t2,$in2[1],$in2[0],0b00
vmsumudm $out[1],$t1,$t2,$vzero
xxpermdi $t2,$in2[2],$in2[1],0b00
vmsumudm $out[2],$t1,$t2,$vzero
vmsumudm $out[2],$in1[2],$in2[0],$out[2]
xxpermdi $t2,$in2[3],$in2[2],0b00
vmsumudm $out[3],$t1,$t2,$vzero
xxpermdi $t3,$in1[2],$in1[3],0b00
xxpermdi $t4,$in2[1],$in2[0],0b00
vmsumudm $out[3],$t3,$t4,$out[3]
xxpermdi $t2,$in2[4],$in2[3],0b00
vmsumudm $out[4],$t1,$t2,$vzero
xxpermdi $t4,$in2[2],$in2[1],0b00
vmsumudm $out[4],$t3,$t4,$out[4]
vmsumudm $out[4],$in1[4],$in2[0],$out[4]
xxpermdi $t2,$in2[5],$in2[4],0b00
vmsumudm $out[5],$t1,$t2,$vzero
xxpermdi $t4,$in2[3],$in2[2],0b00
vmsumudm $out[5],$t3,$t4,$out[5]
xxpermdi $t2,$in2[6],$in2[5],0b00
vmsumudm $out[6],$t1,$t2,$vzero
xxpermdi $t4,$in2[4],$in2[3],0b00
vmsumudm $out[6],$t3,$t4,$out[6]
xxpermdi $t2,$in2[7],$in2[6],0b00
vmsumudm $out[7],$t1,$t2,$vzero
xxpermdi $t4,$in2[5],$in2[4],0b00
vmsumudm $out[7],$t3,$t4,$out[7]
xxpermdi $t2,$in2[8],$in2[7],0b00
vmsumudm $out[8],$t1,$t2,$vzero
xxpermdi $t4,$in2[6],$in2[5],0b00
vmsumudm $out[8],$t3,$t4,$out[8]
xxpermdi $t1,$in1[4],$in1[5],0b00
xxpermdi $t2,$in2[1],$in2[0],0b00
vmsumudm $out[5],$t1,$t2,$out[5]
xxpermdi $t2,$in2[2],$in2[1],0b00
vmsumudm $out[6],$t1,$t2,$out[6]
vmsumudm $out[6],$in1[6],$in2[0],$out[6]
xxpermdi $t2,$in2[3],$in2[2],0b00
vmsumudm $out[7],$t1,$t2,$out[7]
xxpermdi $t3,$in1[6],$in1[7],0b00
xxpermdi $t4,$in2[1],$in2[0],0b00
vmsumudm $out[7],$t3,$t4,$out[7]
xxpermdi $t2,$in2[4],$in2[3],0b00
vmsumudm $out[8],$t1,$t2,$out[8]
xxpermdi $t4,$in2[2],$in2[1],0b00
vmsumudm $out[8],$t3,$t4,$out[8]
vmsumudm $out[8],$in1[8],$in2[0],$out[8]
li $zero,0
li $one,1
mtvsrdd $t1,$one,$zero
___
for (my $i = 0; $i <= 8; $i++) {
$code.=<<___;
vsld $in2[$i],$in2[$i],$t1
___
}
$code.=<<___;
vmsumudm $out[7],$in1[8],$in2[8],$out[7]
xxpermdi $t2,$in2[8],$in2[7],0b00
xxpermdi $t1,$in1[7],$in1[8],0b00
vmsumudm $out[6],$t1,$t2,$out[6]
xxpermdi $t1,$in1[6],$in1[7],0b00
vmsumudm $out[5],$t1,$t2,$out[5]
vmsumudm $out[5],$in1[8],$in2[6],$out[5]
xxpermdi $t1,$in1[5],$in1[6],0b00
vmsumudm $out[4],$t1,$t2,$out[4]
xxpermdi $t4,$in2[6],$in2[5],0b00
xxpermdi $t3,$in1[7],$in1[8],0b00
vmsumudm $out[4],$t3,$t4,$out[4]
xxpermdi $t1,$in1[4],$in1[5],0b00
vmsumudm $out[3],$t1,$t2,$out[3]
xxpermdi $t3,$in1[6],$in1[7],0b00
vmsumudm $out[3],$t3,$t4,$out[3]
vmsumudm $out[3],$in1[8],$in2[4],$out[3]
xxpermdi $t1,$in1[3],$in1[4],0b00
vmsumudm $out[2],$t1,$t2,$out[2]
xxpermdi $t3,$in1[5],$in1[6],0b00
vmsumudm $out[2],$t3,$t4,$out[2]
xxpermdi $t1,$in1[2],$in1[3],0b00
vmsumudm $out[1],$t1,$t2,$out[1]
xxpermdi $t3,$in1[4],$in1[5],0b00
vmsumudm $out[1],$t3,$t4,$out[1]
xxpermdi $t1,$in1[1],$in1[2],0b00
vmsumudm $out[0],$t1,$t2,$out[0]
xxpermdi $t3,$in1[3],$in1[4],0b00
vmsumudm $out[0],$t3,$t4,$out[0]
xxpermdi $t2,$in2[4],$in2[3],0b00
xxpermdi $t1,$in1[7],$in1[8],0b00
vmsumudm $out[2],$t1,$t2,$out[2]
xxpermdi $t1,$in1[6],$in1[7],0b00
vmsumudm $out[1],$t1,$t2,$out[1]
vmsumudm $out[1],$in1[8],$in2[2],$out[1]
xxpermdi $t1,$in1[5],$in1[6],0b00
vmsumudm $out[0],$t1,$t2,$out[0]
xxpermdi $t4,$in2[2],$in2[1],0b00
xxpermdi $t3,$in1[7],$in1[8],0b00
vmsumudm $out[0],$t3,$t4,$out[0]
___
store_vrs($outp, \@out);
pop_vrs(52, 63);
endproc("p521_felem_mul");
}
{
#
# p51_felem_square
#
my ($inp) = ("r4");
my @in = map("v$_",(45..53));
my @inx2 = map("v$_",(35..43));
startproc("p521_felem_square");
push_vrs(52, 63);
$code.=<<___;
vspltisw $vzero,0
___
load_vrs($inp, \@in);
$code.=<<___;
li $zero,0
li $one,1
mtvsrdd $t1,$one,$zero
___
for (my $i = 0; $i <= 8; $i++) {
$code.=<<___;
vsld $inx2[$i],$in[$i],$t1
___
}
$code.=<<___;
vmsumudm $out[0],$in[0],$in[0],$vzero
vmsumudm $out[1],$in[0],$inx2[1],$vzero
xxpermdi $t1,$in[0],$in[1],0b00
xxpermdi $t2,$inx2[2],$in[1],0b00
vmsumudm $out[2],$t1,$t2,$vzero
xxpermdi $t2,$inx2[3],$inx2[2],0b00
vmsumudm $out[3],$t1,$t2,$vzero
xxpermdi $t2,$inx2[4],$inx2[3],0b00
vmsumudm $out[4],$t1,$t2,$vzero
vmsumudm $out[4],$in[2],$in[2],$out[4]
xxpermdi $t2,$inx2[5],$inx2[4],0b00
vmsumudm $out[5],$t1,$t2,$vzero
vmsumudm $out[5],$in[2],$inx2[3],$out[5]
xxpermdi $t2,$inx2[6],$inx2[5],0b00
vmsumudm $out[6],$t1,$t2,$vzero
xxpermdi $t3,$in[2],$in[3],0b00
xxpermdi $t4,$inx2[4],$in[3],0b00
vmsumudm $out[6],$t3,$t4,$out[6]
xxpermdi $t2,$inx2[7],$inx2[6],0b00
vmsumudm $out[7],$t1,$t2,$vzero
xxpermdi $t4,$inx2[5],$inx2[4],0b00
vmsumudm $out[7],$t3,$t4,$out[7]
xxpermdi $t2,$inx2[8],$inx2[7],0b00
vmsumudm $out[8],$t1,$t2,$vzero
xxpermdi $t4,$inx2[6],$inx2[5],0b00
vmsumudm $out[8],$t3,$t4,$out[8]
vmsumudm $out[8],$in[4],$in[4],$out[8]
vmsumudm $out[1],$in[5],$inx2[5],$out[1]
vmsumudm $out[3],$in[6],$inx2[6],$out[3]
vmsumudm $out[5],$in[7],$inx2[7],$out[5]
vmsumudm $out[7],$in[8],$inx2[8],$out[7]
mtvsrdd $t1,$one,$zero
___
for (my $i = 5; $i <= 8; $i++) {
$code.=<<___;
vsld $inx2[$i],$inx2[$i],$t1
___
}
$code.=<<___;
vmsumudm $out[6],$in[7],$inx2[8],$out[6]
vmsumudm $out[5],$in[6],$inx2[8],$out[5]
xxpermdi $t2,$inx2[8],$inx2[7],0b00
xxpermdi $t1,$in[5],$in[6],0b00
vmsumudm $out[4],$t1,$t2,$out[4]
xxpermdi $t1,$in[4],$in[5],0b00
vmsumudm $out[3],$t1,$t2,$out[3]
xxpermdi $t1,$in[3],$in[4],0b00
vmsumudm $out[2],$t1,$t2,$out[2]
vmsumudm $out[2],$in[5],$inx2[6],$out[2]
xxpermdi $t1,$in[2],$in[3],0b00
vmsumudm $out[1],$t1,$t2,$out[1]
vmsumudm $out[1],$in[4],$inx2[6],$out[1]
xxpermdi $t1,$in[1],$in[2],0b00
vmsumudm $out[0],$t1,$t2,$out[0]
xxpermdi $t2,$inx2[6],$inx2[5],0b00
xxpermdi $t1,$in[3],$in[4],0b00
vmsumudm $out[0],$t1,$t2,$out[0]
___
store_vrs($outp, \@out);
pop_vrs(52, 63);
endproc("p521_felem_square");
}
}
$code =~ s/\`([^\`]*)\`/eval $1/gem;
print $code;
close STDOUT or die "error closing STDOUT: $!";
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