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openssl/crypto/sha/asm/keccak1600p8-ppc.pl
Matt Caswell 83cf7abf8e Update copyright year 
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6371)
2018-05-29 13:16:04 +01:00

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#!/usr/bin/env perl
# Copyright 2017-2018 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/.
# ====================================================================
#
# Keccak-1600 for PowerISA 2.07.
#
# June 2017.
#
# This is straightforward KECCAK_1X_ALT SIMD implementation, but with
# disjoint Rho and Pi. The module is ABI-bitness- and endian-neutral.
# POWER8 processor spends 9.8 cycles to process byte out of large
# buffer for r=1088, which matches SHA3-256. This is 17% better than
# scalar PPC64 code. It probably should be noted that if POWER8's
# successor can achieve higher scalar instruction issue rate, then
# this module will loose... And it does on POWER9 with 8.8 vs. 7.2.
$flavour = shift;
if ($flavour =~ /64/) {
$SIZE_T =8;
$LRSAVE =2*$SIZE_T;
$UCMP ="cmpld";
$STU ="stdu";
$POP ="ld";
$PUSH ="std";
} elsif ($flavour =~ /32/) {
$SIZE_T =4;
$LRSAVE =$SIZE_T;
$STU ="stwu";
$POP ="lwz";
$PUSH ="stw";
$UCMP ="cmplw";
} else { die "nonsense $flavour"; }
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $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 ".shift || die "can't call $xlate: $!";
$FRAME=6*$SIZE_T+13*16; # 13*16 is for v20-v31 offload
my $sp ="r1";
my $iotas = "r12";
########################################################################
# Register layout:
#
# v0 A[0][0] A[1][0]
# v1 A[0][1] A[1][1]
# v2 A[0][2] A[1][2]
# v3 A[0][3] A[1][3]
# v4 A[0][4] A[1][4]
#
# v5 A[2][0] A[3][0]
# v6 A[2][1] A[3][1]
# v7 A[2][2] A[3][2]
# v8 A[2][3] A[3][3]
# v9 A[2][4] A[3][4]
#
# v10 A[4][0] A[4][1]
# v11 A[4][2] A[4][3]
# v12 A[4][4] A[4][4]
#
# v13..25 rhotates[][]
# v26..31 volatile
#
$code.=<<___;
.machine "any"
.text
.type KeccakF1600_int,\@function
.align 5
KeccakF1600_int:
li r0,24
mtctr r0
li r0,0
b .Loop
.align 4
.Loop:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Theta
vxor v26,v0, v5 ; A[0..1][0]^A[2..3][0]
vxor v27,v1, v6 ; A[0..1][1]^A[2..3][1]
vxor v28,v2, v7 ; A[0..1][2]^A[2..3][2]
vxor v29,v3, v8 ; A[0..1][3]^A[2..3][3]
vxor v30,v4, v9 ; A[0..1][4]^A[2..3][4]
vpermdi v31,v26,v27,0b00 ; A[0][0..1]^A[2][0..1]
vpermdi v26,v26,v27,0b11 ; A[1][0..1]^A[3][0..1]
vpermdi v27,v28,v29,0b00 ; A[0][2..3]^A[2][2..3]
vpermdi v28,v28,v29,0b11 ; A[1][2..3]^A[3][2..3]
vpermdi v29,v30,v30,0b10 ; A[1..0][4]^A[3..2][4]
vxor v26,v26,v31 ; C[0..1]
vxor v27,v27,v28 ; C[2..3]
vxor v28,v29,v30 ; C[4..4]
vspltisb v31,1
vxor v26,v26,v10 ; C[0..1] ^= A[4][0..1]
vxor v27,v27,v11 ; C[2..3] ^= A[4][2..3]
vxor v28,v28,v12 ; C[4..4] ^= A[4][4..4], low!
vrld v29,v26,v31 ; ROL64(C[0..1],1)
vrld v30,v27,v31 ; ROL64(C[2..3],1)
vrld v31,v28,v31 ; ROL64(C[4..4],1)
vpermdi v31,v31,v29,0b10
vxor v26,v26,v30 ; C[0..1] ^= ROL64(C[2..3],1)
vxor v27,v27,v31 ; C[2..3] ^= ROL64(C[4..0],1)
vxor v28,v28,v29 ; C[4..4] ^= ROL64(C[0..1],1), low!
vpermdi v29,v26,v26,0b00 ; C[0..0]
vpermdi v30,v28,v26,0b10 ; C[4..0]
vpermdi v31,v28,v28,0b11 ; C[4..4]
vxor v1, v1, v29 ; A[0..1][1] ^= C[0..0]
vxor v6, v6, v29 ; A[2..3][1] ^= C[0..0]
vxor v10,v10,v30 ; A[4][0..1] ^= C[4..0]
vxor v0, v0, v31 ; A[0..1][0] ^= C[4..4]
vxor v5, v5, v31 ; A[2..3][0] ^= C[4..4]
vpermdi v29,v27,v27,0b00 ; C[2..2]
vpermdi v30,v26,v26,0b11 ; C[1..1]
vpermdi v31,v26,v27,0b10 ; C[1..2]
vxor v3, v3, v29 ; A[0..1][3] ^= C[2..2]
vxor v8, v8, v29 ; A[2..3][3] ^= C[2..2]
vxor v2, v2, v30 ; A[0..1][2] ^= C[1..1]
vxor v7, v7, v30 ; A[2..3][2] ^= C[1..1]
vxor v11,v11,v31 ; A[4][2..3] ^= C[1..2]
vpermdi v29,v27,v27,0b11 ; C[3..3]
vxor v4, v4, v29 ; A[0..1][4] ^= C[3..3]
vxor v9, v9, v29 ; A[2..3][4] ^= C[3..3]
vxor v12,v12,v29 ; A[4..4][4] ^= C[3..3]
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Rho
vrld v26,v0, v13 ; v0
vrld v1, v1, v14
vrld v27,v2, v15 ; v2
vrld v28,v3, v16 ; v3
vrld v4, v4, v17
vrld v5, v5, v18
vrld v6, v6, v19
vrld v29,v7, v20 ; v7
vrld v8, v8, v21
vrld v9, v9, v22
vrld v10,v10,v23
vrld v30,v11,v24 ; v11
vrld v12,v12,v25
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Pi
vpermdi v0, v26,v28,0b00 ; [0][0] [1][0] < [0][0] [0][3]
vpermdi v2, v29,v5, 0b00 ; [0][2] [1][2] < [2][2] [2][0]
vpermdi v11,v9, v5, 0b01 ; [4][2] [4][3] < [2][4] [3][0]
vpermdi v5, v1, v4, 0b00 ; [2][0] [3][0] < [0][1] [0][4]
vpermdi v1, v1, v4, 0b11 ; [0][1] [1][1] < [1][1] [1][4]
vpermdi v3, v8, v6, 0b11 ; [0][3] [1][3] < [3][3] [3][1]
vpermdi v4, v12,v30,0b10 ; [0][4] [1][4] < [4][4] [4][2]
vpermdi v7, v8, v6, 0b00 ; [2][2] [3][2] < [2][3] [2][1]
vpermdi v6, v27,v26,0b11 ; [2][1] [3][1] < [1][2] [1][0]
vpermdi v8, v9, v29,0b11 ; [2][3] [3][3] < [3][4] [3][2]
vpermdi v12,v10,v10,0b11 ; [4][4] [4][4] < [4][1] [4][1]
vpermdi v9, v10,v30,0b01 ; [2][4] [3][4] < [4][0] [4][3]
vpermdi v10,v27,v28,0b01 ; [4][0] [4][1] < [0][2] [1][3]
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Chi + Iota
lvx_u v31,$iotas,r0 ; iotas[index]
addic r0,r0,16 ; index++
vandc v26,v2, v1 ; (~A[0..1][1] & A[0..1][2])
vandc v27,v3, v2 ; (~A[0..1][2] & A[0..1][3])
vandc v28,v4, v3 ; (~A[0..1][3] & A[0..1][4])
vandc v29,v0, v4 ; (~A[0..1][4] & A[0..1][0])
vandc v30,v1, v0 ; (~A[0..1][0] & A[0..1][1])
vxor v0, v0, v26 ; A[0..1][0] ^= (~A[0..1][1] & A[0..1][2])
vxor v1, v1, v27 ; A[0..1][1] ^= (~A[0..1][2] & A[0..1][3])
vxor v2, v2, v28 ; A[0..1][2] ^= (~A[0..1][3] & A[0..1][4])
vxor v3, v3, v29 ; A[0..1][3] ^= (~A[0..1][4] & A[0..1][0])
vxor v4, v4, v30 ; A[0..1][4] ^= (~A[0..1][0] & A[0..1][1])
vandc v26,v7, v6 ; (~A[2..3][1] & A[2..3][2])
vandc v27,v8, v7 ; (~A[2..3][2] & A[2..3][3])
vandc v28,v9, v8 ; (~A[2..3][3] & A[2..3][4])
vandc v29,v5, v9 ; (~A[2..3][4] & A[2..3][0])
vandc v30,v6, v5 ; (~A[2..3][0] & A[2..3][1])
vxor v5, v5, v26 ; A[2..3][0] ^= (~A[2..3][1] & A[2..3][2])
vxor v6, v6, v27 ; A[2..3][1] ^= (~A[2..3][2] & A[2..3][3])
vxor v7, v7, v28 ; A[2..3][2] ^= (~A[2..3][3] & A[2..3][4])
vxor v8, v8, v29 ; A[2..3][3] ^= (~A[2..3][4] & A[2..3][0])
vxor v9, v9, v30 ; A[2..3][4] ^= (~A[2..3][0] & A[2..3][1])
vxor v0, v0, v31 ; A[0][0] ^= iotas[index++]
vpermdi v26,v10,v11,0b10 ; A[4][1..2]
vpermdi v27,v12,v10,0b00 ; A[4][4..0]
vpermdi v28,v11,v12,0b10 ; A[4][3..4]
vpermdi v29,v10,v10,0b10 ; A[4][1..0]
vandc v26,v11,v26 ; (~A[4][1..2] & A[4][2..3])
vandc v27,v27,v28 ; (~A[4][3..4] & A[4][4..0])
vandc v28,v10,v29 ; (~A[4][1..0] & A[4][0..1])
vxor v10,v10,v26 ; A[4][0..1] ^= (~A[4][1..2] & A[4][2..3])
vxor v11,v11,v27 ; A[4][2..3] ^= (~A[4][3..4] & A[4][4..0])
vxor v12,v12,v28 ; A[4][4..4] ^= (~A[4][0..1] & A[4][1..0])
bdnz .Loop
vpermdi v12,v12,v12,0b11 ; broadcast A[4][4]
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.size KeccakF1600_int,.-KeccakF1600_int
.type KeccakF1600,\@function
.align 5
KeccakF1600:
$STU $sp,-$FRAME($sp)
li r10,`15+6*$SIZE_T`
li r11,`31+6*$SIZE_T`
mflr r8
mfspr r7, 256 ; save vrsave
stvx v20,r10,$sp
addi r10,r10,32
stvx v21,r11,$sp
addi r11,r11,32
stvx v22,r10,$sp
addi r10,r10,32
stvx v23,r11,$sp
addi r11,r11,32
stvx v24,r10,$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,$sp
stw r7,`$FRAME-4`($sp) ; save vrsave
li r0, -1
$PUSH r8,`$FRAME+$LRSAVE`($sp)
mtspr 256, r0 ; preserve all AltiVec registers
li r11,16
lvx_4w v0,0,r3 ; load A[5][5]
li r10,32
lvx_4w v1,r11,r3
addi r11,r11,32
lvx_4w v2,r10,r3
addi r10,r10,32
lvx_4w v3,r11,r3
addi r11,r11,32
lvx_4w v4,r10,r3
addi r10,r10,32
lvx_4w v5,r11,r3
addi r11,r11,32
lvx_4w v6,r10,r3
addi r10,r10,32
lvx_4w v7,r11,r3
addi r11,r11,32
lvx_4w v8,r10,r3
addi r10,r10,32
lvx_4w v9,r11,r3
addi r11,r11,32
lvx_4w v10,r10,r3
addi r10,r10,32
lvx_4w v11,r11,r3
lvx_splt v12,r10,r3
bl PICmeup
li r11,16
lvx_u v13,0,r12 ; load rhotates
li r10,32
lvx_u v14,r11,r12
addi r11,r11,32
lvx_u v15,r10,r12
addi r10,r10,32
lvx_u v16,r11,r12
addi r11,r11,32
lvx_u v17,r10,r12
addi r10,r10,32
lvx_u v18,r11,r12
addi r11,r11,32
lvx_u v19,r10,r12
addi r10,r10,32
lvx_u v20,r11,r12
addi r11,r11,32
lvx_u v21,r10,r12
addi r10,r10,32
lvx_u v22,r11,r12
addi r11,r11,32
lvx_u v23,r10,r12
addi r10,r10,32
lvx_u v24,r11,r12
lvx_u v25,r10,r12
addi r12,r12,`16*16` ; points at iotas
bl KeccakF1600_int
li r11,16
stvx_4w v0,0,r3 ; return A[5][5]
li r10,32
stvx_4w v1,r11,r3
addi r11,r11,32
stvx_4w v2,r10,r3
addi r10,r10,32
stvx_4w v3,r11,r3
addi r11,r11,32
stvx_4w v4,r10,r3
addi r10,r10,32
stvx_4w v5,r11,r3
addi r11,r11,32
stvx_4w v6,r10,r3
addi r10,r10,32
stvx_4w v7,r11,r3
addi r11,r11,32
stvx_4w v8,r10,r3
addi r10,r10,32
stvx_4w v9,r11,r3
addi r11,r11,32
stvx_4w v10,r10,r3
addi r10,r10,32
stvx_4w v11,r11,r3
stvdx_u v12,r10,r3
li r10,`15+6*$SIZE_T`
li r11,`31+6*$SIZE_T`
mtlr r8
mtspr 256, r7 ; restore vrsave
lvx v20,r10,$sp
addi r10,r10,32
lvx v21,r11,$sp
addi r11,r11,32
lvx v22,r10,$sp
addi r10,r10,32
lvx v23,r11,$sp
addi r11,r11,32
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
addi $sp,$sp,$FRAME
blr
.long 0
.byte 0,12,0x04,1,0x80,0,1,0
.long 0
.size KeccakF1600,.-KeccakF1600
___
{
my ($A_jagged,$inp,$len,$bsz) = map("r$_",(3..6));
$code.=<<___;
.globl SHA3_absorb
.type SHA3_absorb,\@function
.align 5
SHA3_absorb:
$STU $sp,-$FRAME($sp)
li r10,`15+6*$SIZE_T`
li r11,`31+6*$SIZE_T`
mflr r8
mfspr r7, 256 ; save vrsave
stvx v20,r10,$sp
addi r10,r10,32
stvx v21,r11,$sp
addi r11,r11,32
stvx v22,r10,$sp
addi r10,r10,32
stvx v23,r11,$sp
addi r11,r11,32
stvx v24,r10,$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,$sp
stw r7,`$FRAME-4`($sp) ; save vrsave
li r0, -1
$PUSH r8,`$FRAME+$LRSAVE`($sp)
mtspr 256, r0 ; preserve all AltiVec registers
li r11,16
lvx_4w v0,0,$A_jagged ; load A[5][5]
li r10,32
lvx_4w v1,r11,$A_jagged
addi r11,r11,32
lvx_4w v2,r10,$A_jagged
addi r10,r10,32
lvx_4w v3,r11,$A_jagged
addi r11,r11,32
lvx_4w v4,r10,$A_jagged
addi r10,r10,32
lvx_4w v5,r11,$A_jagged
addi r11,r11,32
lvx_4w v6,r10,$A_jagged
addi r10,r10,32
lvx_4w v7,r11,$A_jagged
addi r11,r11,32
lvx_4w v8,r10,$A_jagged
addi r10,r10,32
lvx_4w v9,r11,$A_jagged
addi r11,r11,32
lvx_4w v10,r10,$A_jagged
addi r10,r10,32
lvx_4w v11,r11,$A_jagged
lvx_splt v12,r10,$A_jagged
bl PICmeup
li r11,16
lvx_u v13,0,r12 ; load rhotates
li r10,32
lvx_u v14,r11,r12
addi r11,r11,32
lvx_u v15,r10,r12
addi r10,r10,32
lvx_u v16,r11,r12
addi r11,r11,32
lvx_u v17,r10,r12
addi r10,r10,32
lvx_u v18,r11,r12
addi r11,r11,32
lvx_u v19,r10,r12
addi r10,r10,32
lvx_u v20,r11,r12
addi r11,r11,32
lvx_u v21,r10,r12
addi r10,r10,32
lvx_u v22,r11,r12
addi r11,r11,32
lvx_u v23,r10,r12
addi r10,r10,32
lvx_u v24,r11,r12
lvx_u v25,r10,r12
li r10,-32
li r11,-16
addi r12,r12,`16*16` ; points at iotas
b .Loop_absorb
.align 4
.Loop_absorb:
$UCMP $len,$bsz ; len < bsz?
blt .Labsorbed
sub $len,$len,$bsz ; len -= bsz
srwi r0,$bsz,3
mtctr r0
lvx_u v30,r10,r12 ; permutation masks
lvx_u v31,r11,r12
?vspltisb v27,7 ; prepare masks for byte swap
?vxor v30,v30,v27 ; on big-endian
?vxor v31,v31,v27
vxor v27,v27,v27 ; zero
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v0, v0, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v1, v1, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v2, v2, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v3, v3, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v4, v4, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v0, v0, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v1, v1, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v2, v2, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v3, v3, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v4, v4, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v5, v5, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v6, v6, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v7, v7, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v8, v8, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v9, v9, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v5, v5, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v6, v6, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v7, v7, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v8, v8, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v9, v9, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v10, v10, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v10, v10, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v30
vxor v11, v11, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v11, v11, v26
bdz .Lprocess_block
lvdx_u v26,0,$inp
addi $inp,$inp,8
vperm v26,v26,v27,v31
vxor v12, v12, v26
.Lprocess_block:
bl KeccakF1600_int
b .Loop_absorb
.align 4
.Labsorbed:
li r11,16
stvx_4w v0,0,$A_jagged ; return A[5][5]
li r10,32
stvx_4w v1,r11,$A_jagged
addi r11,r11,32
stvx_4w v2,r10,$A_jagged
addi r10,r10,32
stvx_4w v3,r11,$A_jagged
addi r11,r11,32
stvx_4w v4,r10,$A_jagged
addi r10,r10,32
stvx_4w v5,r11,$A_jagged
addi r11,r11,32
stvx_4w v6,r10,$A_jagged
addi r10,r10,32
stvx_4w v7,r11,$A_jagged
addi r11,r11,32
stvx_4w v8,r10,$A_jagged
addi r10,r10,32
stvx_4w v9,r11,$A_jagged
addi r11,r11,32
stvx_4w v10,r10,$A_jagged
addi r10,r10,32
stvx_4w v11,r11,$A_jagged
stvdx_u v12,r10,$A_jagged
mr r3,$len ; return value
li r10,`15+6*$SIZE_T`
li r11,`31+6*$SIZE_T`
mtlr r8
mtspr 256, r7 ; restore vrsave
lvx v20,r10,$sp
addi r10,r10,32
lvx v21,r11,$sp
addi r11,r11,32
lvx v22,r10,$sp
addi r10,r10,32
lvx v23,r11,$sp
addi r11,r11,32
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
addi $sp,$sp,$FRAME
blr
.long 0
.byte 0,12,0x04,1,0x80,0,4,0
.long 0
.size SHA3_absorb,.-SHA3_absorb
___
}
{
my ($A_jagged,$out,$len,$bsz) = map("r$_",(3..6));
$code.=<<___;
.globl SHA3_squeeze
.type SHA3_squeeze,\@function
.align 5
SHA3_squeeze:
mflr r9 ; r9 is not touched by KeccakF1600
subi $out,$out,1 ; prepare for stbu
addi r8,$A_jagged,4 ; prepare volatiles
mr r10,$bsz
li r11,0
b .Loop_squeeze
.align 4
.Loop_squeeze:
lwzx r7,r11,r8 ; lo
lwzx r0,r11,$A_jagged ; hi
${UCMP}i $len,8
blt .Lsqueeze_tail
stbu r7,1($out) ; write lo
srwi r7,r7,8
stbu r7,1($out)
srwi r7,r7,8
stbu r7,1($out)
srwi r7,r7,8
stbu r7,1($out)
stbu r0,1($out) ; write hi
srwi r0,r0,8
stbu r0,1($out)
srwi r0,r0,8
stbu r0,1($out)
srwi r0,r0,8
stbu r0,1($out)
subic. $len,$len,8
beqlr ; return if done
subic. r10,r10,8
ble .Loutput_expand
addi r11,r11,16 ; calculate jagged index
cmplwi r11,`16*5`
blt .Loop_squeeze
subi r11,r11,72
beq .Loop_squeeze
addi r11,r11,72
cmplwi r11,`16*5+8`
subi r11,r11,8
beq .Loop_squeeze
addi r11,r11,8
cmplwi r11,`16*10`
subi r11,r11,72
beq .Loop_squeeze
addi r11,r11,72
blt .Loop_squeeze
subi r11,r11,8
b .Loop_squeeze
.align 4
.Loutput_expand:
bl KeccakF1600
mtlr r9
addi r8,$A_jagged,4 ; restore volatiles
mr r10,$bsz
li r11,0
b .Loop_squeeze
.align 4
.Lsqueeze_tail:
mtctr $len
subic. $len,$len,4
ble .Loop_tail_lo
li r8,4
mtctr r8
.Loop_tail_lo:
stbu r7,1($out)
srdi r7,r7,8
bdnz .Loop_tail_lo
ble .Lsqueeze_done
mtctr $len
.Loop_tail_hi:
stbu r0,1($out)
srdi r0,r0,8
bdnz .Loop_tail_hi
.Lsqueeze_done:
blr
.long 0
.byte 0,12,0x14,0,0,0,4,0
.long 0
.size SHA3_squeeze,.-SHA3_squeeze
___
}
$code.=<<___;
.align 6
PICmeup:
mflr r0
bcl 20,31,\$+4
mflr r12 ; vvvvvv "distance" between . and 1st data entry
addi r12,r12,`64-8`
mtlr r0
blr
.long 0
.byte 0,12,0x14,0,0,0,0,0
.space `64-9*4`
.type rhotates,\@object
.align 6
rhotates:
.quad 0, 36
.quad 1, 44
.quad 62, 6
.quad 28, 55
.quad 27, 20
.quad 3, 41
.quad 10, 45
.quad 43, 15
.quad 25, 21
.quad 39, 8
.quad 18, 2
.quad 61, 56
.quad 14, 14
.size rhotates,.-rhotates
.quad 0,0
.quad 0x0001020304050607,0x1011121314151617
.quad 0x1011121314151617,0x0001020304050607
.type iotas,\@object
iotas:
.quad 0x0000000000000001,0
.quad 0x0000000000008082,0
.quad 0x800000000000808a,0
.quad 0x8000000080008000,0
.quad 0x000000000000808b,0
.quad 0x0000000080000001,0
.quad 0x8000000080008081,0
.quad 0x8000000000008009,0
.quad 0x000000000000008a,0
.quad 0x0000000000000088,0
.quad 0x0000000080008009,0
.quad 0x000000008000000a,0
.quad 0x000000008000808b,0
.quad 0x800000000000008b,0
.quad 0x8000000000008089,0
.quad 0x8000000000008003,0
.quad 0x8000000000008002,0
.quad 0x8000000000000080,0
.quad 0x000000000000800a,0
.quad 0x800000008000000a,0
.quad 0x8000000080008081,0
.quad 0x8000000000008080,0
.quad 0x0000000080000001,0
.quad 0x8000000080008008,0
.size iotas,.-iotas
.asciz "Keccak-1600 absorb and squeeze for PowerISA 2.07, CRYPTOGAMS by <appro\@openssl.org>"
___
foreach (split("\n",$code)) {
s/\`([^\`]*)\`/eval $1/ge;
if ($flavour =~ /le$/) { # little-endian
s/\?([a-z]+)/;$1/;
} else { # big-endian
s/\?([a-z]+)/$1/;
}
print $_,"\n";
}
close STDOUT;
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