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openssl/crypto/sha/asm/sha512-armv4.pl
Andy Polyakov 3405db97e5 ARM assembly pack: make it Windows-friendly. 
"Windows friendliness" means a) flipping .thumb and .text directives,
b) always generate Thumb-2 code when asked(*); c) Windows-specific
references to external OPENSSL_armcap_P.

(*) so far *some* modules were compiled as .code 32 even if Thumb-2
was targeted. It works at hardware level because processor can alternate
between the modes with no overhead. But clang --target=arm-windows's
builtin assembler just refuses to compile .code 32...

Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/8252)
2019-02-16 16:59:23 +01:00

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#! /usr/bin/env perl
# Copyright 2007-2018 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/.
#
# 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
#ifdef __thumb2__
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
___
}
my $_word = ($flavour =~ /win/ ? "DCDU" : ".word");
$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
#if defined(__thumb2__)
.syntax unified
.thumb
# define adrl adr
#else
.code 32
#endif
.text
.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:
# ifdef _WIN32
.word OPENSSL_armcap_P
# else
.word OPENSSL_armcap_P-.Lsha512_block_data_order
# endif
.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
# if !defined(_WIN32)
ldr r12,[r3,r12] @ OPENSSL_armcap_P
# endif
# if defined(__APPLE__) || defined(_WIN32)
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.=<<___;
#ifdef __thumb2__
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
#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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