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linux/arch/arm/crypto/sha512-armv4.pl
Adam Langley c2e415fe75 crypto: clarify licensing of OpenSSL asm code 
Several source files have been taken from OpenSSL. In some of them a
comment that "permission to use under GPL terms is granted" was
included below a contradictory license statement. In several cases,
there was no indication that the license of the code was compatible
with the GPLv2.

This change clarifies the licensing for all of these files. I've
confirmed with the author (Andy Polyakov) that a) he has licensed the
files with the GPLv2 comment under that license and b) that he's also
happy to license the other files under GPLv2 too. In one case, the
file is already contained in his CRYPTOGAMS bundle, which has a GPLv2
option, and so no special measures are needed.

In all cases, the license status of code has been clarified by making
the GPLv2 license prominent.

The .S files have been regenerated from the updated .pl files.

This is a comment-only change. No code is changed.

Signed-off-by: Adam Langley <agl@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2018-05-31 00:13:44 +08:00

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#!/usr/bin/env perl
# SPDX-License-Identifier: GPL-2.0
# This code is taken from the OpenSSL project but the author (Andy Polyakov)
# has relicensed it under the GPLv2. Therefore this program is free software;
# you can redistribute it and/or modify it under the terms of the GNU General
# Public License version 2 as published by the Free Software Foundation.
#
# The original headers, including the original license headers, are
# included below for completeness.
# ====================================================================
# 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/.
# ====================================================================
# SHA512 block procedure for ARMv4. September 2007.
# This code is ~4.5 (four and a half) times faster than code generated
# by gcc 3.4 and it spends ~72 clock cycles per byte [on single-issue
# Xscale PXA250 core].
#
# July 2010.
#
# Rescheduling for dual-issue pipeline resulted in 6% improvement on
# Cortex A8 core and ~40 cycles per processed byte.
# February 2011.
#
# Profiler-assisted and platform-specific optimization resulted in 7%
# improvement on Coxtex A8 core and ~38 cycles per byte.
# March 2011.
#
# Add NEON implementation. On Cortex A8 it was measured to process
# one byte in 23.3 cycles or ~60% faster than integer-only code.
# August 2012.
#
# Improve NEON performance by 12% on Snapdragon S4. In absolute
# terms it's 22.6 cycles per byte, which is disappointing result.
# Technical writers asserted that 3-way S4 pipeline can sustain
# multiple NEON instructions per cycle, but dual NEON issue could
# not be observed, see http://www.openssl.org/~appro/Snapdragon-S4.html
# for further details. On side note Cortex-A15 processes one byte in
# 16 cycles.
# Byte order [in]dependence. =========================================
#
# Originally caller was expected to maintain specific *dword* order in
# h[0-7], namely with most significant dword at *lower* address, which
# was reflected in below two parameters as 0 and 4. Now caller is
# expected to maintain native byte order for whole 64-bit values.
$hi="HI";
$lo="LO";
# ====================================================================
while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
open STDOUT,">$output";
$ctx="r0"; # parameter block
$inp="r1";
$len="r2";
$Tlo="r3";
$Thi="r4";
$Alo="r5";
$Ahi="r6";
$Elo="r7";
$Ehi="r8";
$t0="r9";
$t1="r10";
$t2="r11";
$t3="r12";
############ r13 is stack pointer
$Ktbl="r14";
############ r15 is program counter
$Aoff=8*0;
$Boff=8*1;
$Coff=8*2;
$Doff=8*3;
$Eoff=8*4;
$Foff=8*5;
$Goff=8*6;
$Hoff=8*7;
$Xoff=8*8;
sub BODY_00_15() {
my $magic = shift;
$code.=<<___;
@ Sigma1(x) (ROTR((x),14) ^ ROTR((x),18) ^ ROTR((x),41))
@ LO lo>>14^hi<<18 ^ lo>>18^hi<<14 ^ hi>>9^lo<<23
@ HI hi>>14^lo<<18 ^ hi>>18^lo<<14 ^ lo>>9^hi<<23
mov $t0,$Elo,lsr#14
str $Tlo,[sp,#$Xoff+0]
mov $t1,$Ehi,lsr#14
str $Thi,[sp,#$Xoff+4]
eor $t0,$t0,$Ehi,lsl#18
ldr $t2,[sp,#$Hoff+0] @ h.lo
eor $t1,$t1,$Elo,lsl#18
ldr $t3,[sp,#$Hoff+4] @ h.hi
eor $t0,$t0,$Elo,lsr#18
eor $t1,$t1,$Ehi,lsr#18
eor $t0,$t0,$Ehi,lsl#14
eor $t1,$t1,$Elo,lsl#14
eor $t0,$t0,$Ehi,lsr#9
eor $t1,$t1,$Elo,lsr#9
eor $t0,$t0,$Elo,lsl#23
eor $t1,$t1,$Ehi,lsl#23 @ Sigma1(e)
adds $Tlo,$Tlo,$t0
ldr $t0,[sp,#$Foff+0] @ f.lo
adc $Thi,$Thi,$t1 @ T += Sigma1(e)
ldr $t1,[sp,#$Foff+4] @ f.hi
adds $Tlo,$Tlo,$t2
ldr $t2,[sp,#$Goff+0] @ g.lo
adc $Thi,$Thi,$t3 @ T += h
ldr $t3,[sp,#$Goff+4] @ g.hi
eor $t0,$t0,$t2
str $Elo,[sp,#$Eoff+0]
eor $t1,$t1,$t3
str $Ehi,[sp,#$Eoff+4]
and $t0,$t0,$Elo
str $Alo,[sp,#$Aoff+0]
and $t1,$t1,$Ehi
str $Ahi,[sp,#$Aoff+4]
eor $t0,$t0,$t2
ldr $t2,[$Ktbl,#$lo] @ K[i].lo
eor $t1,$t1,$t3 @ Ch(e,f,g)
ldr $t3,[$Ktbl,#$hi] @ K[i].hi
adds $Tlo,$Tlo,$t0
ldr $Elo,[sp,#$Doff+0] @ d.lo
adc $Thi,$Thi,$t1 @ T += Ch(e,f,g)
ldr $Ehi,[sp,#$Doff+4] @ d.hi
adds $Tlo,$Tlo,$t2
and $t0,$t2,#0xff
adc $Thi,$Thi,$t3 @ T += K[i]
adds $Elo,$Elo,$Tlo
ldr $t2,[sp,#$Boff+0] @ b.lo
adc $Ehi,$Ehi,$Thi @ d += T
teq $t0,#$magic
ldr $t3,[sp,#$Coff+0] @ c.lo
#if __ARM_ARCH__>=7
it eq @ Thumb2 thing, sanity check in ARM
#endif
orreq $Ktbl,$Ktbl,#1
@ Sigma0(x) (ROTR((x),28) ^ ROTR((x),34) ^ ROTR((x),39))
@ LO lo>>28^hi<<4 ^ hi>>2^lo<<30 ^ hi>>7^lo<<25
@ HI hi>>28^lo<<4 ^ lo>>2^hi<<30 ^ lo>>7^hi<<25
mov $t0,$Alo,lsr#28
mov $t1,$Ahi,lsr#28
eor $t0,$t0,$Ahi,lsl#4
eor $t1,$t1,$Alo,lsl#4
eor $t0,$t0,$Ahi,lsr#2
eor $t1,$t1,$Alo,lsr#2
eor $t0,$t0,$Alo,lsl#30
eor $t1,$t1,$Ahi,lsl#30
eor $t0,$t0,$Ahi,lsr#7
eor $t1,$t1,$Alo,lsr#7
eor $t0,$t0,$Alo,lsl#25
eor $t1,$t1,$Ahi,lsl#25 @ Sigma0(a)
adds $Tlo,$Tlo,$t0
and $t0,$Alo,$t2
adc $Thi,$Thi,$t1 @ T += Sigma0(a)
ldr $t1,[sp,#$Boff+4] @ b.hi
orr $Alo,$Alo,$t2
ldr $t2,[sp,#$Coff+4] @ c.hi
and $Alo,$Alo,$t3
and $t3,$Ahi,$t1
orr $Ahi,$Ahi,$t1
orr $Alo,$Alo,$t0 @ Maj(a,b,c).lo
and $Ahi,$Ahi,$t2
adds $Alo,$Alo,$Tlo
orr $Ahi,$Ahi,$t3 @ Maj(a,b,c).hi
sub sp,sp,#8
adc $Ahi,$Ahi,$Thi @ h += T
tst $Ktbl,#1
add $Ktbl,$Ktbl,#8
___
}
$code=<<___;
#ifndef __KERNEL__
# include "arm_arch.h"
# define VFP_ABI_PUSH vstmdb sp!,{d8-d15}
# define VFP_ABI_POP vldmia sp!,{d8-d15}
#else
# define __ARM_ARCH__ __LINUX_ARM_ARCH__
# define __ARM_MAX_ARCH__ 7
# define VFP_ABI_PUSH
# define VFP_ABI_POP
#endif
#ifdef __ARMEL__
# define LO 0
# define HI 4
# define WORD64(hi0,lo0,hi1,lo1) .word lo0,hi0, lo1,hi1
#else
# define HI 0
# define LO 4
# define WORD64(hi0,lo0,hi1,lo1) .word hi0,lo0, hi1,lo1
#endif
.text
#if __ARM_ARCH__<7
.code 32
#else
.syntax unified
# ifdef __thumb2__
# define adrl adr
.thumb
# else
.code 32
# endif
#endif
.type K512,%object
.align 5
K512:
WORD64(0x428a2f98,0xd728ae22, 0x71374491,0x23ef65cd)
WORD64(0xb5c0fbcf,0xec4d3b2f, 0xe9b5dba5,0x8189dbbc)
WORD64(0x3956c25b,0xf348b538, 0x59f111f1,0xb605d019)
WORD64(0x923f82a4,0xaf194f9b, 0xab1c5ed5,0xda6d8118)
WORD64(0xd807aa98,0xa3030242, 0x12835b01,0x45706fbe)
WORD64(0x243185be,0x4ee4b28c, 0x550c7dc3,0xd5ffb4e2)
WORD64(0x72be5d74,0xf27b896f, 0x80deb1fe,0x3b1696b1)
WORD64(0x9bdc06a7,0x25c71235, 0xc19bf174,0xcf692694)
WORD64(0xe49b69c1,0x9ef14ad2, 0xefbe4786,0x384f25e3)
WORD64(0x0fc19dc6,0x8b8cd5b5, 0x240ca1cc,0x77ac9c65)
WORD64(0x2de92c6f,0x592b0275, 0x4a7484aa,0x6ea6e483)
WORD64(0x5cb0a9dc,0xbd41fbd4, 0x76f988da,0x831153b5)
WORD64(0x983e5152,0xee66dfab, 0xa831c66d,0x2db43210)
WORD64(0xb00327c8,0x98fb213f, 0xbf597fc7,0xbeef0ee4)
WORD64(0xc6e00bf3,0x3da88fc2, 0xd5a79147,0x930aa725)
WORD64(0x06ca6351,0xe003826f, 0x14292967,0x0a0e6e70)
WORD64(0x27b70a85,0x46d22ffc, 0x2e1b2138,0x5c26c926)
WORD64(0x4d2c6dfc,0x5ac42aed, 0x53380d13,0x9d95b3df)
WORD64(0x650a7354,0x8baf63de, 0x766a0abb,0x3c77b2a8)
WORD64(0x81c2c92e,0x47edaee6, 0x92722c85,0x1482353b)
WORD64(0xa2bfe8a1,0x4cf10364, 0xa81a664b,0xbc423001)
WORD64(0xc24b8b70,0xd0f89791, 0xc76c51a3,0x0654be30)
WORD64(0xd192e819,0xd6ef5218, 0xd6990624,0x5565a910)
WORD64(0xf40e3585,0x5771202a, 0x106aa070,0x32bbd1b8)
WORD64(0x19a4c116,0xb8d2d0c8, 0x1e376c08,0x5141ab53)
WORD64(0x2748774c,0xdf8eeb99, 0x34b0bcb5,0xe19b48a8)
WORD64(0x391c0cb3,0xc5c95a63, 0x4ed8aa4a,0xe3418acb)
WORD64(0x5b9cca4f,0x7763e373, 0x682e6ff3,0xd6b2b8a3)
WORD64(0x748f82ee,0x5defb2fc, 0x78a5636f,0x43172f60)
WORD64(0x84c87814,0xa1f0ab72, 0x8cc70208,0x1a6439ec)
WORD64(0x90befffa,0x23631e28, 0xa4506ceb,0xde82bde9)
WORD64(0xbef9a3f7,0xb2c67915, 0xc67178f2,0xe372532b)
WORD64(0xca273ece,0xea26619c, 0xd186b8c7,0x21c0c207)
WORD64(0xeada7dd6,0xcde0eb1e, 0xf57d4f7f,0xee6ed178)
WORD64(0x06f067aa,0x72176fba, 0x0a637dc5,0xa2c898a6)
WORD64(0x113f9804,0xbef90dae, 0x1b710b35,0x131c471b)
WORD64(0x28db77f5,0x23047d84, 0x32caab7b,0x40c72493)
WORD64(0x3c9ebe0a,0x15c9bebc, 0x431d67c4,0x9c100d4c)
WORD64(0x4cc5d4be,0xcb3e42b6, 0x597f299c,0xfc657e2a)
WORD64(0x5fcb6fab,0x3ad6faec, 0x6c44198c,0x4a475817)
.size K512,.-K512
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
.LOPENSSL_armcap:
.word OPENSSL_armcap_P-sha512_block_data_order
.skip 32-4
#else
.skip 32
#endif
.global sha512_block_data_order
.type sha512_block_data_order,%function
sha512_block_data_order:
#if __ARM_ARCH__<7
sub r3,pc,#8 @ sha512_block_data_order
#else
adr r3,sha512_block_data_order
#endif
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
ldr r12,.LOPENSSL_armcap
ldr r12,[r3,r12] @ OPENSSL_armcap_P
tst r12,#1
bne .LNEON
#endif
add $len,$inp,$len,lsl#7 @ len to point at the end of inp
stmdb sp!,{r4-r12,lr}
sub $Ktbl,r3,#672 @ K512
sub sp,sp,#9*8
ldr $Elo,[$ctx,#$Eoff+$lo]
ldr $Ehi,[$ctx,#$Eoff+$hi]
ldr $t0, [$ctx,#$Goff+$lo]
ldr $t1, [$ctx,#$Goff+$hi]
ldr $t2, [$ctx,#$Hoff+$lo]
ldr $t3, [$ctx,#$Hoff+$hi]
.Loop:
str $t0, [sp,#$Goff+0]
str $t1, [sp,#$Goff+4]
str $t2, [sp,#$Hoff+0]
str $t3, [sp,#$Hoff+4]
ldr $Alo,[$ctx,#$Aoff+$lo]
ldr $Ahi,[$ctx,#$Aoff+$hi]
ldr $Tlo,[$ctx,#$Boff+$lo]
ldr $Thi,[$ctx,#$Boff+$hi]
ldr $t0, [$ctx,#$Coff+$lo]
ldr $t1, [$ctx,#$Coff+$hi]
ldr $t2, [$ctx,#$Doff+$lo]
ldr $t3, [$ctx,#$Doff+$hi]
str $Tlo,[sp,#$Boff+0]
str $Thi,[sp,#$Boff+4]
str $t0, [sp,#$Coff+0]
str $t1, [sp,#$Coff+4]
str $t2, [sp,#$Doff+0]
str $t3, [sp,#$Doff+4]
ldr $Tlo,[$ctx,#$Foff+$lo]
ldr $Thi,[$ctx,#$Foff+$hi]
str $Tlo,[sp,#$Foff+0]
str $Thi,[sp,#$Foff+4]
.L00_15:
#if __ARM_ARCH__<7
ldrb $Tlo,[$inp,#7]
ldrb $t0, [$inp,#6]
ldrb $t1, [$inp,#5]
ldrb $t2, [$inp,#4]
ldrb $Thi,[$inp,#3]
ldrb $t3, [$inp,#2]
orr $Tlo,$Tlo,$t0,lsl#8
ldrb $t0, [$inp,#1]
orr $Tlo,$Tlo,$t1,lsl#16
ldrb $t1, [$inp],#8
orr $Tlo,$Tlo,$t2,lsl#24
orr $Thi,$Thi,$t3,lsl#8
orr $Thi,$Thi,$t0,lsl#16
orr $Thi,$Thi,$t1,lsl#24
#else
ldr $Tlo,[$inp,#4]
ldr $Thi,[$inp],#8
#ifdef __ARMEL__
rev $Tlo,$Tlo
rev $Thi,$Thi
#endif
#endif
___
&BODY_00_15(0x94);
$code.=<<___;
tst $Ktbl,#1
beq .L00_15
ldr $t0,[sp,#`$Xoff+8*(16-1)`+0]
ldr $t1,[sp,#`$Xoff+8*(16-1)`+4]
bic $Ktbl,$Ktbl,#1
.L16_79:
@ sigma0(x) (ROTR((x),1) ^ ROTR((x),8) ^ ((x)>>7))
@ LO lo>>1^hi<<31 ^ lo>>8^hi<<24 ^ lo>>7^hi<<25
@ HI hi>>1^lo<<31 ^ hi>>8^lo<<24 ^ hi>>7
mov $Tlo,$t0,lsr#1
ldr $t2,[sp,#`$Xoff+8*(16-14)`+0]
mov $Thi,$t1,lsr#1
ldr $t3,[sp,#`$Xoff+8*(16-14)`+4]
eor $Tlo,$Tlo,$t1,lsl#31
eor $Thi,$Thi,$t0,lsl#31
eor $Tlo,$Tlo,$t0,lsr#8
eor $Thi,$Thi,$t1,lsr#8
eor $Tlo,$Tlo,$t1,lsl#24
eor $Thi,$Thi,$t0,lsl#24
eor $Tlo,$Tlo,$t0,lsr#7
eor $Thi,$Thi,$t1,lsr#7
eor $Tlo,$Tlo,$t1,lsl#25
@ sigma1(x) (ROTR((x),19) ^ ROTR((x),61) ^ ((x)>>6))
@ LO lo>>19^hi<<13 ^ hi>>29^lo<<3 ^ lo>>6^hi<<26
@ HI hi>>19^lo<<13 ^ lo>>29^hi<<3 ^ hi>>6
mov $t0,$t2,lsr#19
mov $t1,$t3,lsr#19
eor $t0,$t0,$t3,lsl#13
eor $t1,$t1,$t2,lsl#13
eor $t0,$t0,$t3,lsr#29
eor $t1,$t1,$t2,lsr#29
eor $t0,$t0,$t2,lsl#3
eor $t1,$t1,$t3,lsl#3
eor $t0,$t0,$t2,lsr#6
eor $t1,$t1,$t3,lsr#6
ldr $t2,[sp,#`$Xoff+8*(16-9)`+0]
eor $t0,$t0,$t3,lsl#26
ldr $t3,[sp,#`$Xoff+8*(16-9)`+4]
adds $Tlo,$Tlo,$t0
ldr $t0,[sp,#`$Xoff+8*16`+0]
adc $Thi,$Thi,$t1
ldr $t1,[sp,#`$Xoff+8*16`+4]
adds $Tlo,$Tlo,$t2
adc $Thi,$Thi,$t3
adds $Tlo,$Tlo,$t0
adc $Thi,$Thi,$t1
___
&BODY_00_15(0x17);
$code.=<<___;
#if __ARM_ARCH__>=7
ittt eq @ Thumb2 thing, sanity check in ARM
#endif
ldreq $t0,[sp,#`$Xoff+8*(16-1)`+0]
ldreq $t1,[sp,#`$Xoff+8*(16-1)`+4]
beq .L16_79
bic $Ktbl,$Ktbl,#1
ldr $Tlo,[sp,#$Boff+0]
ldr $Thi,[sp,#$Boff+4]
ldr $t0, [$ctx,#$Aoff+$lo]
ldr $t1, [$ctx,#$Aoff+$hi]
ldr $t2, [$ctx,#$Boff+$lo]
ldr $t3, [$ctx,#$Boff+$hi]
adds $t0,$Alo,$t0
str $t0, [$ctx,#$Aoff+$lo]
adc $t1,$Ahi,$t1
str $t1, [$ctx,#$Aoff+$hi]
adds $t2,$Tlo,$t2
str $t2, [$ctx,#$Boff+$lo]
adc $t3,$Thi,$t3
str $t3, [$ctx,#$Boff+$hi]
ldr $Alo,[sp,#$Coff+0]
ldr $Ahi,[sp,#$Coff+4]
ldr $Tlo,[sp,#$Doff+0]
ldr $Thi,[sp,#$Doff+4]
ldr $t0, [$ctx,#$Coff+$lo]
ldr $t1, [$ctx,#$Coff+$hi]
ldr $t2, [$ctx,#$Doff+$lo]
ldr $t3, [$ctx,#$Doff+$hi]
adds $t0,$Alo,$t0
str $t0, [$ctx,#$Coff+$lo]
adc $t1,$Ahi,$t1
str $t1, [$ctx,#$Coff+$hi]
adds $t2,$Tlo,$t2
str $t2, [$ctx,#$Doff+$lo]
adc $t3,$Thi,$t3
str $t3, [$ctx,#$Doff+$hi]
ldr $Tlo,[sp,#$Foff+0]
ldr $Thi,[sp,#$Foff+4]
ldr $t0, [$ctx,#$Eoff+$lo]
ldr $t1, [$ctx,#$Eoff+$hi]
ldr $t2, [$ctx,#$Foff+$lo]
ldr $t3, [$ctx,#$Foff+$hi]
adds $Elo,$Elo,$t0
str $Elo,[$ctx,#$Eoff+$lo]
adc $Ehi,$Ehi,$t1
str $Ehi,[$ctx,#$Eoff+$hi]
adds $t2,$Tlo,$t2
str $t2, [$ctx,#$Foff+$lo]
adc $t3,$Thi,$t3
str $t3, [$ctx,#$Foff+$hi]
ldr $Alo,[sp,#$Goff+0]
ldr $Ahi,[sp,#$Goff+4]
ldr $Tlo,[sp,#$Hoff+0]
ldr $Thi,[sp,#$Hoff+4]
ldr $t0, [$ctx,#$Goff+$lo]
ldr $t1, [$ctx,#$Goff+$hi]
ldr $t2, [$ctx,#$Hoff+$lo]
ldr $t3, [$ctx,#$Hoff+$hi]
adds $t0,$Alo,$t0
str $t0, [$ctx,#$Goff+$lo]
adc $t1,$Ahi,$t1
str $t1, [$ctx,#$Goff+$hi]
adds $t2,$Tlo,$t2
str $t2, [$ctx,#$Hoff+$lo]
adc $t3,$Thi,$t3
str $t3, [$ctx,#$Hoff+$hi]
add sp,sp,#640
sub $Ktbl,$Ktbl,#640
teq $inp,$len
bne .Loop
add sp,sp,#8*9 @ destroy frame
#if __ARM_ARCH__>=5
ldmia sp!,{r4-r12,pc}
#else
ldmia sp!,{r4-r12,lr}
tst lr,#1
moveq pc,lr @ be binary compatible with V4, yet
bx lr @ interoperable with Thumb ISA:-)
#endif
.size sha512_block_data_order,.-sha512_block_data_order
___
{
my @Sigma0=(28,34,39);
my @Sigma1=(14,18,41);
my @sigma0=(1, 8, 7);
my @sigma1=(19,61,6);
my $Ktbl="r3";
my $cnt="r12"; # volatile register known as ip, intra-procedure-call scratch
my @X=map("d$_",(0..15));
my @V=($A,$B,$C,$D,$E,$F,$G,$H)=map("d$_",(16..23));
sub NEON_00_15() {
my $i=shift;
my ($a,$b,$c,$d,$e,$f,$g,$h)=@_;
my ($t0,$t1,$t2,$T1,$K,$Ch,$Maj)=map("d$_",(24..31)); # temps
$code.=<<___ if ($i<16 || $i&1);
vshr.u64 $t0,$e,#@Sigma1[0] @ $i
#if $i<16
vld1.64 {@X[$i%16]},[$inp]! @ handles unaligned
#endif
vshr.u64 $t1,$e,#@Sigma1[1]
#if $i>0
vadd.i64 $a,$Maj @ h+=Maj from the past
#endif
vshr.u64 $t2,$e,#@Sigma1[2]
___
$code.=<<___;
vld1.64 {$K},[$Ktbl,:64]! @ K[i++]
vsli.64 $t0,$e,#`64-@Sigma1[0]`
vsli.64 $t1,$e,#`64-@Sigma1[1]`
vmov $Ch,$e
vsli.64 $t2,$e,#`64-@Sigma1[2]`
#if $i<16 && defined(__ARMEL__)
vrev64.8 @X[$i],@X[$i]
#endif
veor $t1,$t0
vbsl $Ch,$f,$g @ Ch(e,f,g)
vshr.u64 $t0,$a,#@Sigma0[0]
veor $t2,$t1 @ Sigma1(e)
vadd.i64 $T1,$Ch,$h
vshr.u64 $t1,$a,#@Sigma0[1]
vsli.64 $t0,$a,#`64-@Sigma0[0]`
vadd.i64 $T1,$t2
vshr.u64 $t2,$a,#@Sigma0[2]
vadd.i64 $K,@X[$i%16]
vsli.64 $t1,$a,#`64-@Sigma0[1]`
veor $Maj,$a,$b
vsli.64 $t2,$a,#`64-@Sigma0[2]`
veor $h,$t0,$t1
vadd.i64 $T1,$K
vbsl $Maj,$c,$b @ Maj(a,b,c)
veor $h,$t2 @ Sigma0(a)
vadd.i64 $d,$T1
vadd.i64 $Maj,$T1
@ vadd.i64 $h,$Maj
___
}
sub NEON_16_79() {
my $i=shift;
if ($i&1) { &NEON_00_15($i,@_); return; }
# 2x-vectorized, therefore runs every 2nd round
my @X=map("q$_",(0..7)); # view @X as 128-bit vector
my ($t0,$t1,$s0,$s1) = map("q$_",(12..15)); # temps
my ($d0,$d1,$d2) = map("d$_",(24..26)); # temps from NEON_00_15
my $e=@_[4]; # $e from NEON_00_15
$i /= 2;
$code.=<<___;
vshr.u64 $t0,@X[($i+7)%8],#@sigma1[0]
vshr.u64 $t1,@X[($i+7)%8],#@sigma1[1]
vadd.i64 @_[0],d30 @ h+=Maj from the past
vshr.u64 $s1,@X[($i+7)%8],#@sigma1[2]
vsli.64 $t0,@X[($i+7)%8],#`64-@sigma1[0]`
vext.8 $s0,@X[$i%8],@X[($i+1)%8],#8 @ X[i+1]
vsli.64 $t1,@X[($i+7)%8],#`64-@sigma1[1]`
veor $s1,$t0
vshr.u64 $t0,$s0,#@sigma0[0]
veor $s1,$t1 @ sigma1(X[i+14])
vshr.u64 $t1,$s0,#@sigma0[1]
vadd.i64 @X[$i%8],$s1
vshr.u64 $s1,$s0,#@sigma0[2]
vsli.64 $t0,$s0,#`64-@sigma0[0]`
vsli.64 $t1,$s0,#`64-@sigma0[1]`
vext.8 $s0,@X[($i+4)%8],@X[($i+5)%8],#8 @ X[i+9]
veor $s1,$t0
vshr.u64 $d0,$e,#@Sigma1[0] @ from NEON_00_15
vadd.i64 @X[$i%8],$s0
vshr.u64 $d1,$e,#@Sigma1[1] @ from NEON_00_15
veor $s1,$t1 @ sigma0(X[i+1])
vshr.u64 $d2,$e,#@Sigma1[2] @ from NEON_00_15
vadd.i64 @X[$i%8],$s1
___
&NEON_00_15(2*$i,@_);
}
$code.=<<___;
#if __ARM_MAX_ARCH__>=7
.arch armv7-a
.fpu neon
.global sha512_block_data_order_neon
.type sha512_block_data_order_neon,%function
.align 4
sha512_block_data_order_neon:
.LNEON:
dmb @ errata #451034 on early Cortex A8
add $len,$inp,$len,lsl#7 @ len to point at the end of inp
VFP_ABI_PUSH
adrl $Ktbl,K512
vldmia $ctx,{$A-$H} @ load context
.Loop_neon:
___
for($i=0;$i<16;$i++) { &NEON_00_15($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
mov $cnt,#4
.L16_79_neon:
subs $cnt,#1
___
for(;$i<32;$i++) { &NEON_16_79($i,@V); unshift(@V,pop(@V)); }
$code.=<<___;
bne .L16_79_neon
vadd.i64 $A,d30 @ h+=Maj from the past
vldmia $ctx,{d24-d31} @ load context to temp
vadd.i64 q8,q12 @ vectorized accumulate
vadd.i64 q9,q13
vadd.i64 q10,q14
vadd.i64 q11,q15
vstmia $ctx,{$A-$H} @ save context
teq $inp,$len
sub $Ktbl,#640 @ rewind K512
bne .Loop_neon
VFP_ABI_POP
ret @ bx lr
.size sha512_block_data_order_neon,.-sha512_block_data_order_neon
#endif
___
}
$code.=<<___;
.asciz "SHA512 block transform for ARMv4/NEON, CRYPTOGAMS by <appro\@openssl.org>"
.align 2
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
.comm OPENSSL_armcap_P,4,4
#endif
___
$code =~ s/\`([^\`]*)\`/eval $1/gem;
$code =~ s/\bbx\s+lr\b/.word\t0xe12fff1e/gm; # make it possible to compile with -march=armv4
$code =~ s/\bret\b/bx lr/gm;
open SELF,$0;
while(<SELF>) {
next if (/^#!/);
last if (!s/^#/@/ and !/^$/);
print;
}
close SELF;
print $code;
close STDOUT; # enforce flush
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