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boringssl/crypto/fipsmodule/sha/asm/sha512-armv4.pl
David Benjamin 875095aa7c Silence ARMv8 deprecated IT instruction warnings. 
ARMv8 kindly deprecated most of its IT instructions in Thumb mode.
These files are taken from upstream and are used on both ARMv7 and ARMv8
processors. Accordingly, silence the warnings by marking the file as
targetting ARMv7. In other files, they were accidentally silenced anyway
by way of the existing .arch lines.

This can be reproduced by building with the new NDK and passing
-DCMAKE_ASM_FLAGS=-march=armv8-a. Some of our downstream code ends up
passing that to the assembly.

Note this change does not attempt to arrange for ARMv8-A/T32 to get
code which honors the constraints. It only silences the warnings and
continues to give it the same ARMv7-A/Thumb-2 code that backwards
compatibility dictates it continue to run.

Bug: chromium:575886, b/63131949
Change-Id: I24ce0b695942eaac799347922b243353b43ad7df
Reviewed-on: https://boringssl-review.googlesource.com/24166
Reviewed-by: Adam Langley <agl@google.com>
2017-12-14 01:56:22 +00:00

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#! /usr/bin/env perl
# Copyright 2007-2016 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/.
#
# Permission to use under GPL terms is granted.
# ====================================================================
# 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";
# ====================================================================
$flavour = shift;
if ($flavour=~/\w[\w\-]*\.\w+$/) { $output=$flavour; undef $flavour; }
else { while (($output=shift) && ($output!~/\w[\w\-]*\.\w+$/)) {} }
if ($flavour && $flavour ne "void") {
$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
( $xlate="${dir}arm-xlate.pl" and -f $xlate ) or
( $xlate="${dir}../../../perlasm/arm-xlate.pl" and -f $xlate) or
die "can't locate arm-xlate.pl";
open STDOUT,"| \"$^X\" $xlate $flavour $output";
} else {
open STDOUT,">$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 <openssl/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
@ Silence ARMv8 deprecated IT instruction warnings. This file is used by both
@ ARMv7 and ARMv8 processors and does not use ARMv8 instructions.
.arch armv7-a
#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 defined(__thumb2__)
.syntax unified
.thumb
# define adrl adr
#else
.code 32
#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-.Lsha512_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:
.Lsha512_block_data_order:
#if __ARM_ARCH__<7 && !defined(__thumb2__)
sub r3,pc,#8 @ sha512_block_data_order
#else
adr r3,.Lsha512_block_data_order
#endif
#if __ARM_MAX_ARCH__>=7 && !defined(__KERNEL__)
ldr r12,.LOPENSSL_armcap
ldr r12,[r3,r12] @ OPENSSL_armcap_P
#ifdef __APPLE__
ldr r12,[r12]
#endif
tst r12,#ARMV7_NEON
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
adr $Ktbl,K512
VFP_ABI_PUSH
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
.hidden OPENSSL_armcap_P
#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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