X-Git-Url: https://git.openssl.org/gitweb/?p=openssl.git;a=blobdiff_plain;f=crypto%2Faes%2Fasm%2Faes-armv4.pl;h=c6474b8aadcd46b35a9dade3e0cedd8feb48774b;hp=5a736744a90e42b50a6b08e34a66db0d76836eae;hb=b82acc3c1a7f304c9df31841753a0fa76b5b3cda;hpb=396df7311e599e6fa0d6500e644194e57cd655d2

diff --git a/crypto/aes/asm/aes-armv4.pl b/crypto/aes/asm/aes-armv4.pl
index 5a736744a9..c6474b8aad 100644
--- a/crypto/aes/asm/aes-armv4.pl
+++ b/crypto/aes/asm/aes-armv4.pl
@@ -1,7 +1,14 @@
-#!/usr/bin/env perl
+#! /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@fy.chalmers.se> for the OpenSSL
+# 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/.
@@ -16,14 +23,36 @@
 # allows to merge logical or arithmetic operation with shift or rotate
 # in one instruction and emit combined result every cycle. The module
 # is endian-neutral. The performance is ~42 cycles/byte for 128-bit
-# key.
+# key [on single-issue Xscale PXA250 core].
 
 # May 2007.
 #
 # AES_set_[en|de]crypt_key is added.
 
-while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
-open STDOUT,">$output";
+# July 2010.
+#
+# Rescheduling for dual-issue pipeline resulted in 12% improvement on
+# Cortex A8 core and ~25 cycles per byte processed with 128-bit key.
+
+# February 2011.
+#
+# Profiler-assisted and platform-specific optimization resulted in 16%
+# improvement on Cortex A8 core and ~21.5 cycles per byte.
+
+$flavour = shift;
+if ($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";
+}
 
 $s0="r0";
 $s1="r1";
@@ -41,8 +70,20 @@ $key="r11";
 $rounds="r12";
 
 $code=<<___;
+#ifndef __KERNEL__
+# include "arm_arch.h"
+#else
+# define __ARM_ARCH__ __LINUX_ARM_ARCH__
+#endif
+
 .text
+#if defined(__thumb2__) && !defined(__APPLE__)
+.syntax	unified
+.thumb
+#else
 .code	32
+#undef __thumb2__
+#endif
 
 .type	AES_Te,%object
 .align	5
@@ -156,229 +197,271 @@ AES_Te:
 .type   AES_encrypt,%function
 .align	5
 AES_encrypt:
+#ifndef	__thumb2__
 	sub	r3,pc,#8		@ AES_encrypt
+#else
+	adr	r3,.
+#endif
 	stmdb   sp!,{r1,r4-r12,lr}
+#ifdef	__APPLE__
+	adr	$tbl,AES_Te
+#else
+	sub	$tbl,r3,#AES_encrypt-AES_Te	@ Te
+#endif
 	mov	$rounds,r0		@ inp
 	mov	$key,r2
-	sub	$tbl,r3,#AES_encrypt-AES_Te	@ Te
-
+#if __ARM_ARCH__<7
 	ldrb	$s0,[$rounds,#3]	@ load input data in endian-neutral
 	ldrb	$t1,[$rounds,#2]	@ manner...
 	ldrb	$t2,[$rounds,#1]
 	ldrb	$t3,[$rounds,#0]
 	orr	$s0,$s0,$t1,lsl#8
-	orr	$s0,$s0,$t2,lsl#16
-	orr	$s0,$s0,$t3,lsl#24
 	ldrb	$s1,[$rounds,#7]
+	orr	$s0,$s0,$t2,lsl#16
 	ldrb	$t1,[$rounds,#6]
+	orr	$s0,$s0,$t3,lsl#24
 	ldrb	$t2,[$rounds,#5]
 	ldrb	$t3,[$rounds,#4]
 	orr	$s1,$s1,$t1,lsl#8
-	orr	$s1,$s1,$t2,lsl#16
-	orr	$s1,$s1,$t3,lsl#24
 	ldrb	$s2,[$rounds,#11]
+	orr	$s1,$s1,$t2,lsl#16
 	ldrb	$t1,[$rounds,#10]
+	orr	$s1,$s1,$t3,lsl#24
 	ldrb	$t2,[$rounds,#9]
 	ldrb	$t3,[$rounds,#8]
 	orr	$s2,$s2,$t1,lsl#8
-	orr	$s2,$s2,$t2,lsl#16
-	orr	$s2,$s2,$t3,lsl#24
 	ldrb	$s3,[$rounds,#15]
+	orr	$s2,$s2,$t2,lsl#16
 	ldrb	$t1,[$rounds,#14]
+	orr	$s2,$s2,$t3,lsl#24
 	ldrb	$t2,[$rounds,#13]
 	ldrb	$t3,[$rounds,#12]
 	orr	$s3,$s3,$t1,lsl#8
 	orr	$s3,$s3,$t2,lsl#16
 	orr	$s3,$s3,$t3,lsl#24
-
+#else
+	ldr	$s0,[$rounds,#0]
+	ldr	$s1,[$rounds,#4]
+	ldr	$s2,[$rounds,#8]
+	ldr	$s3,[$rounds,#12]
+#ifdef __ARMEL__
+	rev	$s0,$s0
+	rev	$s1,$s1
+	rev	$s2,$s2
+	rev	$s3,$s3
+#endif
+#endif
 	bl	_armv4_AES_encrypt
 
 	ldr	$rounds,[sp],#4		@ pop out
+#if __ARM_ARCH__>=7
+#ifdef __ARMEL__
+	rev	$s0,$s0
+	rev	$s1,$s1
+	rev	$s2,$s2
+	rev	$s3,$s3
+#endif
+	str	$s0,[$rounds,#0]
+	str	$s1,[$rounds,#4]
+	str	$s2,[$rounds,#8]
+	str	$s3,[$rounds,#12]
+#else
 	mov	$t1,$s0,lsr#24		@ write output in endian-neutral
 	mov	$t2,$s0,lsr#16		@ manner...
 	mov	$t3,$s0,lsr#8
 	strb	$t1,[$rounds,#0]
 	strb	$t2,[$rounds,#1]
-	strb	$t3,[$rounds,#2]
-	strb	$s0,[$rounds,#3]
 	mov	$t1,$s1,lsr#24
+	strb	$t3,[$rounds,#2]
 	mov	$t2,$s1,lsr#16
+	strb	$s0,[$rounds,#3]
 	mov	$t3,$s1,lsr#8
 	strb	$t1,[$rounds,#4]
 	strb	$t2,[$rounds,#5]
-	strb	$t3,[$rounds,#6]
-	strb	$s1,[$rounds,#7]
 	mov	$t1,$s2,lsr#24
+	strb	$t3,[$rounds,#6]
 	mov	$t2,$s2,lsr#16
+	strb	$s1,[$rounds,#7]
 	mov	$t3,$s2,lsr#8
 	strb	$t1,[$rounds,#8]
 	strb	$t2,[$rounds,#9]
-	strb	$t3,[$rounds,#10]
-	strb	$s2,[$rounds,#11]
 	mov	$t1,$s3,lsr#24
+	strb	$t3,[$rounds,#10]
 	mov	$t2,$s3,lsr#16
+	strb	$s2,[$rounds,#11]
 	mov	$t3,$s3,lsr#8
 	strb	$t1,[$rounds,#12]
 	strb	$t2,[$rounds,#13]
 	strb	$t3,[$rounds,#14]
 	strb	$s3,[$rounds,#15]
-
+#endif
+#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	AES_encrypt,.-AES_encrypt
 
 .type   _armv4_AES_encrypt,%function
 .align	2
 _armv4_AES_encrypt:
 	str	lr,[sp,#-4]!		@ push lr
-	ldr	$t1,[$key],#16
-	ldr	$t2,[$key,#-12]
-	ldr	$t3,[$key,#-8]
-	ldr	$i1,[$key,#-4]
-	ldr	$rounds,[$key,#240-16]
+	ldmia	$key!,{$t1-$i1}
 	eor	$s0,$s0,$t1
+	ldr	$rounds,[$key,#240-16]
 	eor	$s1,$s1,$t2
 	eor	$s2,$s2,$t3
 	eor	$s3,$s3,$i1
 	sub	$rounds,$rounds,#1
 	mov	lr,#255
 
-.Lenc_loop:
+	and	$i1,lr,$s0
 	and	$i2,lr,$s0,lsr#8
 	and	$i3,lr,$s0,lsr#16
-	and	$i1,lr,$s0
 	mov	$s0,$s0,lsr#24
+.Lenc_loop:
 	ldr	$t1,[$tbl,$i1,lsl#2]	@ Te3[s0>>0]
-	ldr	$s0,[$tbl,$s0,lsl#2]	@ Te0[s0>>24]
-	ldr	$t2,[$tbl,$i2,lsl#2]	@ Te2[s0>>8]
-	ldr	$t3,[$tbl,$i3,lsl#2]	@ Te1[s0>>16]
-
 	and	$i1,lr,$s1,lsr#16	@ i0
+	ldr	$t2,[$tbl,$i2,lsl#2]	@ Te2[s0>>8]
 	and	$i2,lr,$s1
+	ldr	$t3,[$tbl,$i3,lsl#2]	@ Te1[s0>>16]
 	and	$i3,lr,$s1,lsr#8
+	ldr	$s0,[$tbl,$s0,lsl#2]	@ Te0[s0>>24]
 	mov	$s1,$s1,lsr#24
+
 	ldr	$i1,[$tbl,$i1,lsl#2]	@ Te1[s1>>16]
-	ldr	$s1,[$tbl,$s1,lsl#2]	@ Te0[s1>>24]
 	ldr	$i2,[$tbl,$i2,lsl#2]	@ Te3[s1>>0]
 	ldr	$i3,[$tbl,$i3,lsl#2]	@ Te2[s1>>8]
 	eor	$s0,$s0,$i1,ror#8
-	eor	$s1,$s1,$t1,ror#24
-	eor	$t2,$t2,$i2,ror#8
-	eor	$t3,$t3,$i3,ror#8
-
+	ldr	$s1,[$tbl,$s1,lsl#2]	@ Te0[s1>>24]
 	and	$i1,lr,$s2,lsr#8	@ i0
+	eor	$t2,$t2,$i2,ror#8
 	and	$i2,lr,$s2,lsr#16	@ i1
+	eor	$t3,$t3,$i3,ror#8
 	and	$i3,lr,$s2
-	mov	$s2,$s2,lsr#24
 	ldr	$i1,[$tbl,$i1,lsl#2]	@ Te2[s2>>8]
+	eor	$s1,$s1,$t1,ror#24
 	ldr	$i2,[$tbl,$i2,lsl#2]	@ Te1[s2>>16]
-	ldr	$s2,[$tbl,$s2,lsl#2]	@ Te0[s2>>24]
+	mov	$s2,$s2,lsr#24
+
 	ldr	$i3,[$tbl,$i3,lsl#2]	@ Te3[s2>>0]
 	eor	$s0,$s0,$i1,ror#16
-	eor	$s1,$s1,$i2,ror#8
-	eor	$s2,$s2,$t2,ror#16
-	eor	$t3,$t3,$i3,ror#16
-
+	ldr	$s2,[$tbl,$s2,lsl#2]	@ Te0[s2>>24]
 	and	$i1,lr,$s3		@ i0
+	eor	$s1,$s1,$i2,ror#8
 	and	$i2,lr,$s3,lsr#8	@ i1
+	eor	$t3,$t3,$i3,ror#16
 	and	$i3,lr,$s3,lsr#16	@ i2
-	mov	$s3,$s3,lsr#24
 	ldr	$i1,[$tbl,$i1,lsl#2]	@ Te3[s3>>0]
+	eor	$s2,$s2,$t2,ror#16
 	ldr	$i2,[$tbl,$i2,lsl#2]	@ Te2[s3>>8]
+	mov	$s3,$s3,lsr#24
+
 	ldr	$i3,[$tbl,$i3,lsl#2]	@ Te1[s3>>16]
-	ldr	$s3,[$tbl,$s3,lsl#2]	@ Te0[s3>>24]
 	eor	$s0,$s0,$i1,ror#24
+	ldr	$i1,[$key],#16
 	eor	$s1,$s1,$i2,ror#16
+	ldr	$s3,[$tbl,$s3,lsl#2]	@ Te0[s3>>24]
 	eor	$s2,$s2,$i3,ror#8
+	ldr	$t1,[$key,#-12]
 	eor	$s3,$s3,$t3,ror#8
 
-	ldr	$t1,[$key],#16
-	ldr	$t2,[$key,#-12]
-	ldr	$t3,[$key,#-8]
-	ldr	$i1,[$key,#-4]
-	eor	$s0,$s0,$t1
-	eor	$s1,$s1,$t2
-	eor	$s2,$s2,$t3
-	eor	$s3,$s3,$i1
+	ldr	$t2,[$key,#-8]
+	eor	$s0,$s0,$i1
+	ldr	$t3,[$key,#-4]
+	and	$i1,lr,$s0
+	eor	$s1,$s1,$t1
+	and	$i2,lr,$s0,lsr#8
+	eor	$s2,$s2,$t2
+	and	$i3,lr,$s0,lsr#16
+	eor	$s3,$s3,$t3
+	mov	$s0,$s0,lsr#24
 
 	subs	$rounds,$rounds,#1
 	bne	.Lenc_loop
 
 	add	$tbl,$tbl,#2
 
-	and	$i1,lr,$s0
-	and	$i2,lr,$s0,lsr#8
-	and	$i3,lr,$s0,lsr#16
-	mov	$s0,$s0,lsr#24
 	ldrb	$t1,[$tbl,$i1,lsl#2]	@ Te4[s0>>0]
-	ldrb	$s0,[$tbl,$s0,lsl#2]	@ Te4[s0>>24]
-	ldrb	$t2,[$tbl,$i2,lsl#2]	@ Te4[s0>>8]
-	ldrb	$t3,[$tbl,$i3,lsl#2]	@ Te4[s0>>16]
-
 	and	$i1,lr,$s1,lsr#16	@ i0
+	ldrb	$t2,[$tbl,$i2,lsl#2]	@ Te4[s0>>8]
 	and	$i2,lr,$s1
+	ldrb	$t3,[$tbl,$i3,lsl#2]	@ Te4[s0>>16]
 	and	$i3,lr,$s1,lsr#8
+	ldrb	$s0,[$tbl,$s0,lsl#2]	@ Te4[s0>>24]
 	mov	$s1,$s1,lsr#24
+
 	ldrb	$i1,[$tbl,$i1,lsl#2]	@ Te4[s1>>16]
-	ldrb	$s1,[$tbl,$s1,lsl#2]	@ Te4[s1>>24]
 	ldrb	$i2,[$tbl,$i2,lsl#2]	@ Te4[s1>>0]
 	ldrb	$i3,[$tbl,$i3,lsl#2]	@ Te4[s1>>8]
 	eor	$s0,$i1,$s0,lsl#8
-	eor	$s1,$t1,$s1,lsl#24
-	eor	$t2,$i2,$t2,lsl#8
-	eor	$t3,$i3,$t3,lsl#8
-
+	ldrb	$s1,[$tbl,$s1,lsl#2]	@ Te4[s1>>24]
 	and	$i1,lr,$s2,lsr#8	@ i0
+	eor	$t2,$i2,$t2,lsl#8
 	and	$i2,lr,$s2,lsr#16	@ i1
+	eor	$t3,$i3,$t3,lsl#8
 	and	$i3,lr,$s2
-	mov	$s2,$s2,lsr#24
 	ldrb	$i1,[$tbl,$i1,lsl#2]	@ Te4[s2>>8]
+	eor	$s1,$t1,$s1,lsl#24
 	ldrb	$i2,[$tbl,$i2,lsl#2]	@ Te4[s2>>16]
-	ldrb	$s2,[$tbl,$s2,lsl#2]	@ Te4[s2>>24]
+	mov	$s2,$s2,lsr#24
+
 	ldrb	$i3,[$tbl,$i3,lsl#2]	@ Te4[s2>>0]
 	eor	$s0,$i1,$s0,lsl#8
-	eor	$s1,$s1,$i2,lsl#16
-	eor	$s2,$t2,$s2,lsl#24
-	eor	$t3,$i3,$t3,lsl#8
-
+	ldrb	$s2,[$tbl,$s2,lsl#2]	@ Te4[s2>>24]
 	and	$i1,lr,$s3		@ i0
+	eor	$s1,$s1,$i2,lsl#16
 	and	$i2,lr,$s3,lsr#8	@ i1
+	eor	$t3,$i3,$t3,lsl#8
 	and	$i3,lr,$s3,lsr#16	@ i2
-	mov	$s3,$s3,lsr#24
 	ldrb	$i1,[$tbl,$i1,lsl#2]	@ Te4[s3>>0]
+	eor	$s2,$t2,$s2,lsl#24
 	ldrb	$i2,[$tbl,$i2,lsl#2]	@ Te4[s3>>8]
+	mov	$s3,$s3,lsr#24
+
 	ldrb	$i3,[$tbl,$i3,lsl#2]	@ Te4[s3>>16]
-	ldrb	$s3,[$tbl,$s3,lsl#2]	@ Te4[s3>>24]
 	eor	$s0,$i1,$s0,lsl#8
+	ldr	$i1,[$key,#0]
+	ldrb	$s3,[$tbl,$s3,lsl#2]	@ Te4[s3>>24]
 	eor	$s1,$s1,$i2,lsl#8
+	ldr	$t1,[$key,#4]
 	eor	$s2,$s2,$i3,lsl#16
+	ldr	$t2,[$key,#8]
 	eor	$s3,$t3,$s3,lsl#24
+	ldr	$t3,[$key,#12]
 
-	ldr	lr,[sp],#4		@ pop lr
-	ldr	$t1,[$key,#0]
-	ldr	$t2,[$key,#4]
-	ldr	$t3,[$key,#8]
-	ldr	$i1,[$key,#12]
-	eor	$s0,$s0,$t1
-	eor	$s1,$s1,$t2
-	eor	$s2,$s2,$t3
-	eor	$s3,$s3,$i1
+	eor	$s0,$s0,$i1
+	eor	$s1,$s1,$t1
+	eor	$s2,$s2,$t2
+	eor	$s3,$s3,$t3
 
 	sub	$tbl,$tbl,#2
-	mov	pc,lr			@ return
+	ldr	pc,[sp],#4		@ pop and return
 .size	_armv4_AES_encrypt,.-_armv4_AES_encrypt
 
 .global AES_set_encrypt_key
 .type   AES_set_encrypt_key,%function
 .align	5
 AES_set_encrypt_key:
+_armv4_AES_set_encrypt_key:
+#ifndef	__thumb2__
 	sub	r3,pc,#8		@ AES_set_encrypt_key
+#else
+	adr	r3,.
+#endif
 	teq	r0,#0
+#ifdef	__thumb2__
+	itt	eq			@ Thumb2 thing, sanity check in ARM
+#endif
 	moveq	r0,#-1
 	beq	.Labrt
 	teq	r2,#0
+#ifdef	__thumb2__
+	itt	eq			@ Thumb2 thing, sanity check in ARM
+#endif
 	moveq	r0,#-1
 	beq	.Labrt
 
@@ -387,48 +470,72 @@ AES_set_encrypt_key:
 	teq	r1,#192
 	beq	.Lok
 	teq	r1,#256
+#ifdef	__thumb2__
+	itt	ne			@ Thumb2 thing, sanity check in ARM
+#endif
 	movne	r0,#-1
 	bne	.Labrt
 
 .Lok:	stmdb   sp!,{r4-r12,lr}
-	sub	$tbl,r3,#AES_set_encrypt_key-AES_Te-1024	@ Te4
-
 	mov	$rounds,r0		@ inp
 	mov	lr,r1			@ bits
 	mov	$key,r2			@ key
 
+#ifdef	__APPLE__
+	adr	$tbl,AES_Te+1024				@ Te4
+#else
+	sub	$tbl,r3,#_armv4_AES_set_encrypt_key-AES_Te-1024	@ Te4
+#endif
+
+#if __ARM_ARCH__<7
 	ldrb	$s0,[$rounds,#3]	@ load input data in endian-neutral
 	ldrb	$t1,[$rounds,#2]	@ manner...
 	ldrb	$t2,[$rounds,#1]
 	ldrb	$t3,[$rounds,#0]
 	orr	$s0,$s0,$t1,lsl#8
-	orr	$s0,$s0,$t2,lsl#16
-	orr	$s0,$s0,$t3,lsl#24
 	ldrb	$s1,[$rounds,#7]
+	orr	$s0,$s0,$t2,lsl#16
 	ldrb	$t1,[$rounds,#6]
+	orr	$s0,$s0,$t3,lsl#24
 	ldrb	$t2,[$rounds,#5]
 	ldrb	$t3,[$rounds,#4]
 	orr	$s1,$s1,$t1,lsl#8
-	orr	$s1,$s1,$t2,lsl#16
-	orr	$s1,$s1,$t3,lsl#24
 	ldrb	$s2,[$rounds,#11]
+	orr	$s1,$s1,$t2,lsl#16
 	ldrb	$t1,[$rounds,#10]
+	orr	$s1,$s1,$t3,lsl#24
 	ldrb	$t2,[$rounds,#9]
 	ldrb	$t3,[$rounds,#8]
 	orr	$s2,$s2,$t1,lsl#8
-	orr	$s2,$s2,$t2,lsl#16
-	orr	$s2,$s2,$t3,lsl#24
 	ldrb	$s3,[$rounds,#15]
+	orr	$s2,$s2,$t2,lsl#16
 	ldrb	$t1,[$rounds,#14]
+	orr	$s2,$s2,$t3,lsl#24
 	ldrb	$t2,[$rounds,#13]
 	ldrb	$t3,[$rounds,#12]
 	orr	$s3,$s3,$t1,lsl#8
+	str	$s0,[$key],#16
 	orr	$s3,$s3,$t2,lsl#16
+	str	$s1,[$key,#-12]
 	orr	$s3,$s3,$t3,lsl#24
+	str	$s2,[$key,#-8]
+	str	$s3,[$key,#-4]
+#else
+	ldr	$s0,[$rounds,#0]
+	ldr	$s1,[$rounds,#4]
+	ldr	$s2,[$rounds,#8]
+	ldr	$s3,[$rounds,#12]
+#ifdef __ARMEL__
+	rev	$s0,$s0
+	rev	$s1,$s1
+	rev	$s2,$s2
+	rev	$s3,$s3
+#endif
 	str	$s0,[$key],#16
 	str	$s1,[$key,#-12]
 	str	$s2,[$key,#-8]
 	str	$s3,[$key,#-4]
+#endif
 
 	teq	lr,#128
 	bne	.Lnot128
@@ -440,48 +547,58 @@ AES_set_encrypt_key:
 .L128_loop:
 	and	$t2,lr,$s3,lsr#24
 	and	$i1,lr,$s3,lsr#16
-	and	$i2,lr,$s3,lsr#8
-	and	$i3,lr,$s3
 	ldrb	$t2,[$tbl,$t2]
+	and	$i2,lr,$s3,lsr#8
 	ldrb	$i1,[$tbl,$i1]
+	and	$i3,lr,$s3
 	ldrb	$i2,[$tbl,$i2]
-	ldrb	$i3,[$tbl,$i3]
-	ldr	$t1,[$t3],#4			@ rcon[i++]
 	orr	$t2,$t2,$i1,lsl#24
+	ldrb	$i3,[$tbl,$i3]
 	orr	$t2,$t2,$i2,lsl#16
+	ldr	$t1,[$t3],#4			@ rcon[i++]
 	orr	$t2,$t2,$i3,lsl#8
 	eor	$t2,$t2,$t1
 	eor	$s0,$s0,$t2			@ rk[4]=rk[0]^...
 	eor	$s1,$s1,$s0			@ rk[5]=rk[1]^rk[4]
-	eor	$s2,$s2,$s1			@ rk[6]=rk[2]^rk[5]
-	eor	$s3,$s3,$s2			@ rk[7]=rk[3]^rk[6]
 	str	$s0,[$key],#16
+	eor	$s2,$s2,$s1			@ rk[6]=rk[2]^rk[5]
 	str	$s1,[$key,#-12]
+	eor	$s3,$s3,$s2			@ rk[7]=rk[3]^rk[6]
 	str	$s2,[$key,#-8]
-	str	$s3,[$key,#-4]
-
 	subs	$rounds,$rounds,#1
+	str	$s3,[$key,#-4]
 	bne	.L128_loop
 	sub	r2,$key,#176
 	b	.Ldone
 
 .Lnot128:
+#if __ARM_ARCH__<7
 	ldrb	$i2,[$rounds,#19]
 	ldrb	$t1,[$rounds,#18]
 	ldrb	$t2,[$rounds,#17]
 	ldrb	$t3,[$rounds,#16]
 	orr	$i2,$i2,$t1,lsl#8
-	orr	$i2,$i2,$t2,lsl#16
-	orr	$i2,$i2,$t3,lsl#24
 	ldrb	$i3,[$rounds,#23]
+	orr	$i2,$i2,$t2,lsl#16
 	ldrb	$t1,[$rounds,#22]
+	orr	$i2,$i2,$t3,lsl#24
 	ldrb	$t2,[$rounds,#21]
 	ldrb	$t3,[$rounds,#20]
 	orr	$i3,$i3,$t1,lsl#8
 	orr	$i3,$i3,$t2,lsl#16
+	str	$i2,[$key],#8
 	orr	$i3,$i3,$t3,lsl#24
+	str	$i3,[$key,#-4]
+#else
+	ldr	$i2,[$rounds,#16]
+	ldr	$i3,[$rounds,#20]
+#ifdef __ARMEL__
+	rev	$i2,$i2
+	rev	$i3,$i3
+#endif
 	str	$i2,[$key],#8
 	str	$i3,[$key,#-4]
+#endif
 
 	teq	lr,#192
 	bne	.Lnot192
@@ -494,27 +611,29 @@ AES_set_encrypt_key:
 .L192_loop:
 	and	$t2,lr,$i3,lsr#24
 	and	$i1,lr,$i3,lsr#16
-	and	$i2,lr,$i3,lsr#8
-	and	$i3,lr,$i3
 	ldrb	$t2,[$tbl,$t2]
+	and	$i2,lr,$i3,lsr#8
 	ldrb	$i1,[$tbl,$i1]
+	and	$i3,lr,$i3
 	ldrb	$i2,[$tbl,$i2]
-	ldrb	$i3,[$tbl,$i3]
-	ldr	$t1,[$t3],#4			@ rcon[i++]
 	orr	$t2,$t2,$i1,lsl#24
+	ldrb	$i3,[$tbl,$i3]
 	orr	$t2,$t2,$i2,lsl#16
+	ldr	$t1,[$t3],#4			@ rcon[i++]
 	orr	$t2,$t2,$i3,lsl#8
 	eor	$i3,$t2,$t1
 	eor	$s0,$s0,$i3			@ rk[6]=rk[0]^...
 	eor	$s1,$s1,$s0			@ rk[7]=rk[1]^rk[6]
-	eor	$s2,$s2,$s1			@ rk[8]=rk[2]^rk[7]
-	eor	$s3,$s3,$s2			@ rk[9]=rk[3]^rk[8]
 	str	$s0,[$key],#24
+	eor	$s2,$s2,$s1			@ rk[8]=rk[2]^rk[7]
 	str	$s1,[$key,#-20]
+	eor	$s3,$s3,$s2			@ rk[9]=rk[3]^rk[8]
 	str	$s2,[$key,#-16]
-	str	$s3,[$key,#-12]
-
 	subs	$rounds,$rounds,#1
+	str	$s3,[$key,#-12]
+#ifdef	__thumb2__
+	itt	eq				@ Thumb2 thing, sanity check in ARM
+#endif
 	subeq	r2,$key,#216
 	beq	.Ldone
 
@@ -527,22 +646,33 @@ AES_set_encrypt_key:
 	b	.L192_loop
 
 .Lnot192:
+#if __ARM_ARCH__<7
 	ldrb	$i2,[$rounds,#27]
 	ldrb	$t1,[$rounds,#26]
 	ldrb	$t2,[$rounds,#25]
 	ldrb	$t3,[$rounds,#24]
 	orr	$i2,$i2,$t1,lsl#8
-	orr	$i2,$i2,$t2,lsl#16
-	orr	$i2,$i2,$t3,lsl#24
 	ldrb	$i3,[$rounds,#31]
+	orr	$i2,$i2,$t2,lsl#16
 	ldrb	$t1,[$rounds,#30]
+	orr	$i2,$i2,$t3,lsl#24
 	ldrb	$t2,[$rounds,#29]
 	ldrb	$t3,[$rounds,#28]
 	orr	$i3,$i3,$t1,lsl#8
 	orr	$i3,$i3,$t2,lsl#16
+	str	$i2,[$key],#8
 	orr	$i3,$i3,$t3,lsl#24
+	str	$i3,[$key,#-4]
+#else
+	ldr	$i2,[$rounds,#24]
+	ldr	$i3,[$rounds,#28]
+#ifdef __ARMEL__
+	rev	$i2,$i2
+	rev	$i3,$i3
+#endif
 	str	$i2,[$key],#8
 	str	$i3,[$key,#-4]
+#endif
 
 	mov	$rounds,#14
 	str	$rounds,[$key,#240-32]
@@ -553,61 +683,69 @@ AES_set_encrypt_key:
 .L256_loop:
 	and	$t2,lr,$i3,lsr#24
 	and	$i1,lr,$i3,lsr#16
-	and	$i2,lr,$i3,lsr#8
-	and	$i3,lr,$i3
 	ldrb	$t2,[$tbl,$t2]
+	and	$i2,lr,$i3,lsr#8
 	ldrb	$i1,[$tbl,$i1]
+	and	$i3,lr,$i3
 	ldrb	$i2,[$tbl,$i2]
-	ldrb	$i3,[$tbl,$i3]
-	ldr	$t1,[$t3],#4			@ rcon[i++]
 	orr	$t2,$t2,$i1,lsl#24
+	ldrb	$i3,[$tbl,$i3]
 	orr	$t2,$t2,$i2,lsl#16
+	ldr	$t1,[$t3],#4			@ rcon[i++]
 	orr	$t2,$t2,$i3,lsl#8
 	eor	$i3,$t2,$t1
 	eor	$s0,$s0,$i3			@ rk[8]=rk[0]^...
 	eor	$s1,$s1,$s0			@ rk[9]=rk[1]^rk[8]
-	eor	$s2,$s2,$s1			@ rk[10]=rk[2]^rk[9]
-	eor	$s3,$s3,$s2			@ rk[11]=rk[3]^rk[10]
 	str	$s0,[$key],#32
+	eor	$s2,$s2,$s1			@ rk[10]=rk[2]^rk[9]
 	str	$s1,[$key,#-28]
+	eor	$s3,$s3,$s2			@ rk[11]=rk[3]^rk[10]
 	str	$s2,[$key,#-24]
-	str	$s3,[$key,#-20]
-
 	subs	$rounds,$rounds,#1
+	str	$s3,[$key,#-20]
+#ifdef	__thumb2__
+	itt	eq				@ Thumb2 thing, sanity check in ARM
+#endif
 	subeq	r2,$key,#256
 	beq	.Ldone
 
 	and	$t2,lr,$s3
 	and	$i1,lr,$s3,lsr#8
-	and	$i2,lr,$s3,lsr#16
-	and	$i3,lr,$s3,lsr#24
 	ldrb	$t2,[$tbl,$t2]
+	and	$i2,lr,$s3,lsr#16
 	ldrb	$i1,[$tbl,$i1]
+	and	$i3,lr,$s3,lsr#24
 	ldrb	$i2,[$tbl,$i2]
-	ldrb	$i3,[$tbl,$i3]
 	orr	$t2,$t2,$i1,lsl#8
+	ldrb	$i3,[$tbl,$i3]
 	orr	$t2,$t2,$i2,lsl#16
+	ldr	$t1,[$key,#-48]
 	orr	$t2,$t2,$i3,lsl#24
 
-	ldr	$t1,[$key,#-48]
 	ldr	$i1,[$key,#-44]
 	ldr	$i2,[$key,#-40]
-	ldr	$i3,[$key,#-36]
 	eor	$t1,$t1,$t2			@ rk[12]=rk[4]^...
+	ldr	$i3,[$key,#-36]
 	eor	$i1,$i1,$t1			@ rk[13]=rk[5]^rk[12]
-	eor	$i2,$i2,$i1			@ rk[14]=rk[6]^rk[13]
-	eor	$i3,$i3,$i2			@ rk[15]=rk[7]^rk[14]
 	str	$t1,[$key,#-16]
+	eor	$i2,$i2,$i1			@ rk[14]=rk[6]^rk[13]
 	str	$i1,[$key,#-12]
+	eor	$i3,$i3,$i2			@ rk[15]=rk[7]^rk[14]
 	str	$i2,[$key,#-8]
 	str	$i3,[$key,#-4]
 	b	.L256_loop
 
+.align	2
 .Ldone:	mov	r0,#0
 	ldmia   sp!,{r4-r12,lr}
-.Labrt:	tst	lr,#1
+.Labrt:
+#if __ARM_ARCH__>=5
+	ret				@ bx lr
+#else
+	tst	lr,#1
 	moveq	pc,lr			@ be binary compatible with V4, yet
 	bx	lr			@ interoperable with Thumb ISA:-)
+#endif
 .size	AES_set_encrypt_key,.-AES_set_encrypt_key
 
 .global AES_set_decrypt_key
@@ -615,36 +753,59 @@ AES_set_encrypt_key:
 .align	5
 AES_set_decrypt_key:
 	str	lr,[sp,#-4]!            @ push lr
-	bl	AES_set_encrypt_key
+	bl	_armv4_AES_set_encrypt_key
 	teq	r0,#0
-	ldrne	lr,[sp],#4              @ pop lr
+	ldr	lr,[sp],#4              @ pop lr
 	bne	.Labrt
 
-	stmdb   sp!,{r4-r12}
+	mov	r0,r2			@ AES_set_encrypt_key preserves r2,
+	mov	r1,r2			@ which is AES_KEY *key
+	b	_armv4_AES_set_enc2dec_key
+.size	AES_set_decrypt_key,.-AES_set_decrypt_key
 
-	ldr	$rounds,[r2,#240]	@ AES_set_encrypt_key preserves r2,
-	mov	$key,r2			@ which is AES_KEY *key
-	mov	$i1,r2
-	add	$i2,r2,$rounds,lsl#4
+@ void AES_set_enc2dec_key(const AES_KEY *inp,AES_KEY *out)
+.global	AES_set_enc2dec_key
+.type	AES_set_enc2dec_key,%function
+.align	5
+AES_set_enc2dec_key:
+_armv4_AES_set_enc2dec_key:
+	stmdb   sp!,{r4-r12,lr}
+
+	ldr	$rounds,[r0,#240]
+	mov	$i1,r0			@ input
+	add	$i2,r0,$rounds,lsl#4
+	mov	$key,r1			@ output
+	add	$tbl,r1,$rounds,lsl#4
+	str	$rounds,[r1,#240]
+
+.Linv:	ldr	$s0,[$i1],#16
+	ldr	$s1,[$i1,#-12]
+	ldr	$s2,[$i1,#-8]
+	ldr	$s3,[$i1,#-4]
+	ldr	$t1,[$i2],#-16
+	ldr	$t2,[$i2,#16+4]
+	ldr	$t3,[$i2,#16+8]
+	ldr	$i3,[$i2,#16+12]
+	str	$s0,[$tbl],#-16
+	str	$s1,[$tbl,#16+4]
+	str	$s2,[$tbl,#16+8]
+	str	$s3,[$tbl,#16+12]
+	str	$t1,[$key],#16
+	str	$t2,[$key,#-12]
+	str	$t3,[$key,#-8]
+	str	$i3,[$key,#-4]
+	teq	$i1,$i2
+	bne	.Linv
 
-.Linv:	ldr	$s0,[$i1]
+	ldr	$s0,[$i1]
 	ldr	$s1,[$i1,#4]
 	ldr	$s2,[$i1,#8]
 	ldr	$s3,[$i1,#12]
-	ldr	$t1,[$i2]
-	ldr	$t2,[$i2,#4]
-	ldr	$t3,[$i2,#8]
-	ldr	$i3,[$i2,#12]
-	str	$s0,[$i2],#-16
-	str	$s1,[$i2,#16+4]
-	str	$s2,[$i2,#16+8]
-	str	$s3,[$i2,#16+12]
-	str	$t1,[$i1],#16
-	str	$t2,[$i1,#-12]
-	str	$t3,[$i1,#-8]
-	str	$i3,[$i1,#-4]
-	teq	$i1,$i2
-	bne	.Linv
+	str	$s0,[$key]
+	str	$s1,[$key,#4]
+	str	$s2,[$key,#8]
+	str	$s3,[$key,#12]
+	sub	$key,$key,$rounds,lsl#3
 ___
 $mask80=$i1;
 $mask1b=$i2;
@@ -694,11 +855,15 @@ $code.=<<___;
 	bne	.Lmix
 
 	mov	r0,#0
+#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:-)
-.size	AES_set_decrypt_key,.-AES_set_decrypt_key
+#endif
+.size	AES_set_enc2dec_key,.-AES_set_enc2dec_key
 
 .type	AES_Td,%object
 .align	5
@@ -808,228 +973,273 @@ AES_Td:
 .type   AES_decrypt,%function
 .align	5
 AES_decrypt:
+#ifndef	__thumb2__
 	sub	r3,pc,#8		@ AES_decrypt
+#else
+	adr	r3,.
+#endif
 	stmdb   sp!,{r1,r4-r12,lr}
+#ifdef	__APPLE__
+	adr	$tbl,AES_Td
+#else
+	sub	$tbl,r3,#AES_decrypt-AES_Td	@ Td
+#endif
 	mov	$rounds,r0		@ inp
 	mov	$key,r2
-	sub	$tbl,r3,#AES_decrypt-AES_Td		@ Td
-
+#if __ARM_ARCH__<7
 	ldrb	$s0,[$rounds,#3]	@ load input data in endian-neutral
 	ldrb	$t1,[$rounds,#2]	@ manner...
 	ldrb	$t2,[$rounds,#1]
 	ldrb	$t3,[$rounds,#0]
 	orr	$s0,$s0,$t1,lsl#8
-	orr	$s0,$s0,$t2,lsl#16
-	orr	$s0,$s0,$t3,lsl#24
 	ldrb	$s1,[$rounds,#7]
+	orr	$s0,$s0,$t2,lsl#16
 	ldrb	$t1,[$rounds,#6]
+	orr	$s0,$s0,$t3,lsl#24
 	ldrb	$t2,[$rounds,#5]
 	ldrb	$t3,[$rounds,#4]
 	orr	$s1,$s1,$t1,lsl#8
-	orr	$s1,$s1,$t2,lsl#16
-	orr	$s1,$s1,$t3,lsl#24
 	ldrb	$s2,[$rounds,#11]
+	orr	$s1,$s1,$t2,lsl#16
 	ldrb	$t1,[$rounds,#10]
+	orr	$s1,$s1,$t3,lsl#24
 	ldrb	$t2,[$rounds,#9]
 	ldrb	$t3,[$rounds,#8]
 	orr	$s2,$s2,$t1,lsl#8
-	orr	$s2,$s2,$t2,lsl#16
-	orr	$s2,$s2,$t3,lsl#24
 	ldrb	$s3,[$rounds,#15]
+	orr	$s2,$s2,$t2,lsl#16
 	ldrb	$t1,[$rounds,#14]
+	orr	$s2,$s2,$t3,lsl#24
 	ldrb	$t2,[$rounds,#13]
 	ldrb	$t3,[$rounds,#12]
 	orr	$s3,$s3,$t1,lsl#8
 	orr	$s3,$s3,$t2,lsl#16
 	orr	$s3,$s3,$t3,lsl#24
-
+#else
+	ldr	$s0,[$rounds,#0]
+	ldr	$s1,[$rounds,#4]
+	ldr	$s2,[$rounds,#8]
+	ldr	$s3,[$rounds,#12]
+#ifdef __ARMEL__
+	rev	$s0,$s0
+	rev	$s1,$s1
+	rev	$s2,$s2
+	rev	$s3,$s3
+#endif
+#endif
 	bl	_armv4_AES_decrypt
 
 	ldr	$rounds,[sp],#4		@ pop out
+#if __ARM_ARCH__>=7
+#ifdef __ARMEL__
+	rev	$s0,$s0
+	rev	$s1,$s1
+	rev	$s2,$s2
+	rev	$s3,$s3
+#endif
+	str	$s0,[$rounds,#0]
+	str	$s1,[$rounds,#4]
+	str	$s2,[$rounds,#8]
+	str	$s3,[$rounds,#12]
+#else
 	mov	$t1,$s0,lsr#24		@ write output in endian-neutral
 	mov	$t2,$s0,lsr#16		@ manner...
 	mov	$t3,$s0,lsr#8
 	strb	$t1,[$rounds,#0]
 	strb	$t2,[$rounds,#1]
-	strb	$t3,[$rounds,#2]
-	strb	$s0,[$rounds,#3]
 	mov	$t1,$s1,lsr#24
+	strb	$t3,[$rounds,#2]
 	mov	$t2,$s1,lsr#16
+	strb	$s0,[$rounds,#3]
 	mov	$t3,$s1,lsr#8
 	strb	$t1,[$rounds,#4]
 	strb	$t2,[$rounds,#5]
-	strb	$t3,[$rounds,#6]
-	strb	$s1,[$rounds,#7]
 	mov	$t1,$s2,lsr#24
+	strb	$t3,[$rounds,#6]
 	mov	$t2,$s2,lsr#16
+	strb	$s1,[$rounds,#7]
 	mov	$t3,$s2,lsr#8
 	strb	$t1,[$rounds,#8]
 	strb	$t2,[$rounds,#9]
-	strb	$t3,[$rounds,#10]
-	strb	$s2,[$rounds,#11]
 	mov	$t1,$s3,lsr#24
+	strb	$t3,[$rounds,#10]
 	mov	$t2,$s3,lsr#16
+	strb	$s2,[$rounds,#11]
 	mov	$t3,$s3,lsr#8
 	strb	$t1,[$rounds,#12]
 	strb	$t2,[$rounds,#13]
 	strb	$t3,[$rounds,#14]
 	strb	$s3,[$rounds,#15]
-
+#endif
+#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	AES_decrypt,.-AES_decrypt
 
 .type   _armv4_AES_decrypt,%function
 .align	2
 _armv4_AES_decrypt:
 	str	lr,[sp,#-4]!		@ push lr
-	ldr	$t1,[$key],#16
-	ldr	$t2,[$key,#-12]
-	ldr	$t3,[$key,#-8]
-	ldr	$i1,[$key,#-4]
-	ldr	$rounds,[$key,#240-16]
+	ldmia	$key!,{$t1-$i1}
 	eor	$s0,$s0,$t1
+	ldr	$rounds,[$key,#240-16]
 	eor	$s1,$s1,$t2
 	eor	$s2,$s2,$t3
 	eor	$s3,$s3,$i1
 	sub	$rounds,$rounds,#1
 	mov	lr,#255
 
-.Ldec_loop:
 	and	$i1,lr,$s0,lsr#16
 	and	$i2,lr,$s0,lsr#8
 	and	$i3,lr,$s0
 	mov	$s0,$s0,lsr#24
+.Ldec_loop:
 	ldr	$t1,[$tbl,$i1,lsl#2]	@ Td1[s0>>16]
-	ldr	$s0,[$tbl,$s0,lsl#2]	@ Td0[s0>>24]
-	ldr	$t2,[$tbl,$i2,lsl#2]	@ Td2[s0>>8]
-	ldr	$t3,[$tbl,$i3,lsl#2]	@ Td3[s0>>0]
-
 	and	$i1,lr,$s1		@ i0
+	ldr	$t2,[$tbl,$i2,lsl#2]	@ Td2[s0>>8]
 	and	$i2,lr,$s1,lsr#16
+	ldr	$t3,[$tbl,$i3,lsl#2]	@ Td3[s0>>0]
 	and	$i3,lr,$s1,lsr#8
+	ldr	$s0,[$tbl,$s0,lsl#2]	@ Td0[s0>>24]
 	mov	$s1,$s1,lsr#24
+
 	ldr	$i1,[$tbl,$i1,lsl#2]	@ Td3[s1>>0]
-	ldr	$s1,[$tbl,$s1,lsl#2]	@ Td0[s1>>24]
 	ldr	$i2,[$tbl,$i2,lsl#2]	@ Td1[s1>>16]
 	ldr	$i3,[$tbl,$i3,lsl#2]	@ Td2[s1>>8]
 	eor	$s0,$s0,$i1,ror#24
-	eor	$s1,$s1,$t1,ror#8
-	eor	$t2,$i2,$t2,ror#8
-	eor	$t3,$i3,$t3,ror#8
-
+	ldr	$s1,[$tbl,$s1,lsl#2]	@ Td0[s1>>24]
 	and	$i1,lr,$s2,lsr#8	@ i0
+	eor	$t2,$i2,$t2,ror#8
 	and	$i2,lr,$s2		@ i1
+	eor	$t3,$i3,$t3,ror#8
 	and	$i3,lr,$s2,lsr#16
-	mov	$s2,$s2,lsr#24
 	ldr	$i1,[$tbl,$i1,lsl#2]	@ Td2[s2>>8]
+	eor	$s1,$s1,$t1,ror#8
 	ldr	$i2,[$tbl,$i2,lsl#2]	@ Td3[s2>>0]
-	ldr	$s2,[$tbl,$s2,lsl#2]	@ Td0[s2>>24]
+	mov	$s2,$s2,lsr#24
+
 	ldr	$i3,[$tbl,$i3,lsl#2]	@ Td1[s2>>16]
 	eor	$s0,$s0,$i1,ror#16
-	eor	$s1,$s1,$i2,ror#24
-	eor	$s2,$s2,$t2,ror#8
-	eor	$t3,$i3,$t3,ror#8
-
+	ldr	$s2,[$tbl,$s2,lsl#2]	@ Td0[s2>>24]
 	and	$i1,lr,$s3,lsr#16	@ i0
+	eor	$s1,$s1,$i2,ror#24
 	and	$i2,lr,$s3,lsr#8	@ i1
+	eor	$t3,$i3,$t3,ror#8
 	and	$i3,lr,$s3		@ i2
-	mov	$s3,$s3,lsr#24
 	ldr	$i1,[$tbl,$i1,lsl#2]	@ Td1[s3>>16]
+	eor	$s2,$s2,$t2,ror#8
 	ldr	$i2,[$tbl,$i2,lsl#2]	@ Td2[s3>>8]
+	mov	$s3,$s3,lsr#24
+
 	ldr	$i3,[$tbl,$i3,lsl#2]	@ Td3[s3>>0]
-	ldr	$s3,[$tbl,$s3,lsl#2]	@ Td0[s3>>24]
 	eor	$s0,$s0,$i1,ror#8
+	ldr	$i1,[$key],#16
 	eor	$s1,$s1,$i2,ror#16
+	ldr	$s3,[$tbl,$s3,lsl#2]	@ Td0[s3>>24]
 	eor	$s2,$s2,$i3,ror#24
-	eor	$s3,$s3,$t3,ror#8
 
-	ldr	$t1,[$key],#16
-	ldr	$t2,[$key,#-12]
-	ldr	$t3,[$key,#-8]
-	ldr	$i1,[$key,#-4]
-	eor	$s0,$s0,$t1
-	eor	$s1,$s1,$t2
-	eor	$s2,$s2,$t3
-	eor	$s3,$s3,$i1
+	ldr	$t1,[$key,#-12]
+	eor	$s0,$s0,$i1
+	ldr	$t2,[$key,#-8]
+	eor	$s3,$s3,$t3,ror#8
+	ldr	$t3,[$key,#-4]
+	and	$i1,lr,$s0,lsr#16
+	eor	$s1,$s1,$t1
+	and	$i2,lr,$s0,lsr#8
+	eor	$s2,$s2,$t2
+	and	$i3,lr,$s0
+	eor	$s3,$s3,$t3
+	mov	$s0,$s0,lsr#24
 
 	subs	$rounds,$rounds,#1
 	bne	.Ldec_loop
 
 	add	$tbl,$tbl,#1024
 
-	ldr	$t1,[$tbl,#0]		@ prefetch Td4
-	ldr	$t2,[$tbl,#32]
-	ldr	$t3,[$tbl,#64]
-	ldr	$i1,[$tbl,#96]
-	ldr	$i2,[$tbl,#128]
-	ldr	$i3,[$tbl,#160]
-	ldr	$t1,[$tbl,#192]
-	ldr	$t2,[$tbl,#224]
+	ldr	$t2,[$tbl,#0]		@ prefetch Td4
+	ldr	$t3,[$tbl,#32]
+	ldr	$t1,[$tbl,#64]
+	ldr	$t2,[$tbl,#96]
+	ldr	$t3,[$tbl,#128]
+	ldr	$t1,[$tbl,#160]
+	ldr	$t2,[$tbl,#192]
+	ldr	$t3,[$tbl,#224]
 
-	and	$i1,lr,$s0,lsr#16
-	and	$i2,lr,$s0,lsr#8
-	and	$i3,lr,$s0
-	ldrb	$s0,[$tbl,$s0,lsr#24]	@ Td4[s0>>24]
+	ldrb	$s0,[$tbl,$s0]		@ Td4[s0>>24]
 	ldrb	$t1,[$tbl,$i1]		@ Td4[s0>>16]
-	ldrb	$t2,[$tbl,$i2]		@ Td4[s0>>8]
-	ldrb	$t3,[$tbl,$i3]		@ Td4[s0>>0]
-
 	and	$i1,lr,$s1		@ i0
+	ldrb	$t2,[$tbl,$i2]		@ Td4[s0>>8]
 	and	$i2,lr,$s1,lsr#16
+	ldrb	$t3,[$tbl,$i3]		@ Td4[s0>>0]
 	and	$i3,lr,$s1,lsr#8
+
+	add	$s1,$tbl,$s1,lsr#24
 	ldrb	$i1,[$tbl,$i1]		@ Td4[s1>>0]
-	ldrb	$s1,[$tbl,$s1,lsr#24]	@ Td4[s1>>24]
+	ldrb	$s1,[$s1]		@ Td4[s1>>24]
 	ldrb	$i2,[$tbl,$i2]		@ Td4[s1>>16]
-	ldrb	$i3,[$tbl,$i3]		@ Td4[s1>>8]
 	eor	$s0,$i1,$s0,lsl#24
+	ldrb	$i3,[$tbl,$i3]		@ Td4[s1>>8]
 	eor	$s1,$t1,$s1,lsl#8
-	eor	$t2,$t2,$i2,lsl#8
-	eor	$t3,$t3,$i3,lsl#8
-
 	and	$i1,lr,$s2,lsr#8	@ i0
+	eor	$t2,$t2,$i2,lsl#8
 	and	$i2,lr,$s2		@ i1
-	and	$i3,lr,$s2,lsr#16
 	ldrb	$i1,[$tbl,$i1]		@ Td4[s2>>8]
+	eor	$t3,$t3,$i3,lsl#8
 	ldrb	$i2,[$tbl,$i2]		@ Td4[s2>>0]
-	ldrb	$s2,[$tbl,$s2,lsr#24]	@ Td4[s2>>24]
-	ldrb	$i3,[$tbl,$i3]		@ Td4[s2>>16]
+	and	$i3,lr,$s2,lsr#16
+
+	add	$s2,$tbl,$s2,lsr#24
+	ldrb	$s2,[$s2]		@ Td4[s2>>24]
 	eor	$s0,$s0,$i1,lsl#8
+	ldrb	$i3,[$tbl,$i3]		@ Td4[s2>>16]
 	eor	$s1,$i2,$s1,lsl#16
-	eor	$s2,$t2,$s2,lsl#16
-	eor	$t3,$t3,$i3,lsl#16
-
 	and	$i1,lr,$s3,lsr#16	@ i0
+	eor	$s2,$t2,$s2,lsl#16
 	and	$i2,lr,$s3,lsr#8	@ i1
-	and	$i3,lr,$s3		@ i2
 	ldrb	$i1,[$tbl,$i1]		@ Td4[s3>>16]
+	eor	$t3,$t3,$i3,lsl#16
 	ldrb	$i2,[$tbl,$i2]		@ Td4[s3>>8]
+	and	$i3,lr,$s3		@ i2
+
+	add	$s3,$tbl,$s3,lsr#24
 	ldrb	$i3,[$tbl,$i3]		@ Td4[s3>>0]
-	ldrb	$s3,[$tbl,$s3,lsr#24]	@ Td4[s3>>24]
+	ldrb	$s3,[$s3]		@ Td4[s3>>24]
 	eor	$s0,$s0,$i1,lsl#16
+	ldr	$i1,[$key,#0]
 	eor	$s1,$s1,$i2,lsl#8
+	ldr	$t1,[$key,#4]
 	eor	$s2,$i3,$s2,lsl#8
+	ldr	$t2,[$key,#8]
 	eor	$s3,$t3,$s3,lsl#24
+	ldr	$t3,[$key,#12]
 
-	ldr	lr,[sp],#4		@ pop lr
-	ldr	$t1,[$key,#0]
-	ldr	$t2,[$key,#4]
-	ldr	$t3,[$key,#8]
-	ldr	$i1,[$key,#12]
-	eor	$s0,$s0,$t1
-	eor	$s1,$s1,$t2
-	eor	$s2,$s2,$t3
-	eor	$s3,$s3,$i1
+	eor	$s0,$s0,$i1
+	eor	$s1,$s1,$t1
+	eor	$s2,$s2,$t2
+	eor	$s3,$s3,$t3
 
 	sub	$tbl,$tbl,#1024
-	mov	pc,lr			@ return
+	ldr	pc,[sp],#4		@ pop and return
 .size	_armv4_AES_decrypt,.-_armv4_AES_decrypt
 .asciz	"AES for ARMv4, CRYPTOGAMS by <appro\@openssl.org>"
 .align	2
 ___
 
 $code =~ s/\bbx\s+lr\b/.word\t0xe12fff1e/gm;	# make it possible to compile with -march=armv4
+$code =~ s/\bret\b/bx\tlr/gm;
+
+open SELF,$0;
+while(<SELF>) {
+	next if (/^#!/);
+	last if (!s/^#/@/ and !/^$/);
+	print;
+}
+close SELF;
+
 print $code;
 close STDOUT;	# enforce flush