From 67326634496ef21b4acbf4cef2f05040d34aef9b Mon Sep 17 00:00:00 2001
From: marha <marha@users.sourceforge.net>
Date: Tue, 10 Apr 2012 11:41:26 +0200
Subject: Update to openssl-1.0.1

---
 openssl/crypto/sha/asm/sha256-armv4.pl | 55 ++++++++++++++++++++++++----------
 1 file changed, 40 insertions(+), 15 deletions(-)

(limited to 'openssl/crypto/sha/asm/sha256-armv4.pl')

diff --git a/openssl/crypto/sha/asm/sha256-armv4.pl b/openssl/crypto/sha/asm/sha256-armv4.pl
index 492cb62bc..9c84e8d93 100644
--- a/openssl/crypto/sha/asm/sha256-armv4.pl
+++ b/openssl/crypto/sha/asm/sha256-armv4.pl
@@ -18,11 +18,16 @@
 # Rescheduling for dual-issue pipeline resulted in 22% improvement on
 # Cortex A8 core and ~20 cycles per processed byte.
 
+# February 2011.
+#
+# Profiler-assisted and platform-specific optimization resulted in 16%
+# improvement on Cortex A8 core and ~17 cycles per processed byte.
+
 while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {}
 open STDOUT,">$output";
 
 $ctx="r0";	$t0="r0";
-$inp="r1";
+$inp="r1";	$t3="r1";
 $len="r2";	$t1="r2";
 $T1="r3";
 $A="r4";
@@ -46,6 +51,9 @@ sub BODY_00_15 {
 my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;
 
 $code.=<<___ if ($i<16);
+#if __ARM_ARCH__>=7
+	ldr	$T1,[$inp],#4
+#else
 	ldrb	$T1,[$inp,#3]			@ $i
 	ldrb	$t2,[$inp,#2]
 	ldrb	$t1,[$inp,#1]
@@ -53,16 +61,24 @@ $code.=<<___ if ($i<16);
 	orr	$T1,$T1,$t2,lsl#8
 	orr	$T1,$T1,$t1,lsl#16
 	orr	$T1,$T1,$t0,lsl#24
-	`"str	$inp,[sp,#17*4]"	if ($i==15)`
+#endif
 ___
 $code.=<<___;
-	ldr	$t2,[$Ktbl],#4			@ *K256++
 	mov	$t0,$e,ror#$Sigma1[0]
-	str	$T1,[sp,#`$i%16`*4]
+	ldr	$t2,[$Ktbl],#4			@ *K256++
 	eor	$t0,$t0,$e,ror#$Sigma1[1]
 	eor	$t1,$f,$g
+#if $i>=16
+	add	$T1,$T1,$t3			@ from BODY_16_xx
+#elif __ARM_ARCH__>=7 && defined(__ARMEL__)
+	rev	$T1,$T1
+#endif
+#if $i==15
+	str	$inp,[sp,#17*4]			@ leave room for $t3
+#endif
 	eor	$t0,$t0,$e,ror#$Sigma1[2]	@ Sigma1(e)
 	and	$t1,$t1,$e
+	str	$T1,[sp,#`$i%16`*4]
 	add	$T1,$T1,$t0
 	eor	$t1,$t1,$g			@ Ch(e,f,g)
 	add	$T1,$T1,$h
@@ -71,6 +87,9 @@ $code.=<<___;
 	eor	$h,$h,$a,ror#$Sigma0[1]
 	add	$T1,$T1,$t2
 	eor	$h,$h,$a,ror#$Sigma0[2]		@ Sigma0(a)
+#if $i>=15
+	ldr	$t3,[sp,#`($i+2)%16`*4]		@ from BODY_16_xx
+#endif
 	orr	$t0,$a,$b
 	and	$t1,$a,$b
 	and	$t0,$t0,$c
@@ -85,24 +104,26 @@ sub BODY_16_XX {
 my ($i,$a,$b,$c,$d,$e,$f,$g,$h) = @_;
 
 $code.=<<___;
-	ldr	$t1,[sp,#`($i+1)%16`*4]		@ $i
+	@ ldr	$t3,[sp,#`($i+1)%16`*4]		@ $i
 	ldr	$t2,[sp,#`($i+14)%16`*4]
+	mov	$t0,$t3,ror#$sigma0[0]
 	ldr	$T1,[sp,#`($i+0)%16`*4]
-	mov	$t0,$t1,ror#$sigma0[0]
-	ldr	$inp,[sp,#`($i+9)%16`*4]
-	eor	$t0,$t0,$t1,ror#$sigma0[1]
-	eor	$t0,$t0,$t1,lsr#$sigma0[2]	@ sigma0(X[i+1])
-	mov	$t1,$t2,ror#$sigma1[0]
+	eor	$t0,$t0,$t3,ror#$sigma0[1]
+	ldr	$t1,[sp,#`($i+9)%16`*4]
+	eor	$t0,$t0,$t3,lsr#$sigma0[2]	@ sigma0(X[i+1])
+	mov	$t3,$t2,ror#$sigma1[0]
 	add	$T1,$T1,$t0
-	eor	$t1,$t1,$t2,ror#$sigma1[1]
-	add	$T1,$T1,$inp
-	eor	$t1,$t1,$t2,lsr#$sigma1[2]	@ sigma1(X[i+14])
+	eor	$t3,$t3,$t2,ror#$sigma1[1]
 	add	$T1,$T1,$t1
+	eor	$t3,$t3,$t2,lsr#$sigma1[2]	@ sigma1(X[i+14])
+	@ add	$T1,$T1,$t3
 ___
 	&BODY_00_15(@_);
 }
 
 $code=<<___;
+#include "arm_arch.h"
+
 .text
 .code	32
 
@@ -132,7 +153,7 @@ K256:
 sha256_block_data_order:
 	sub	r3,pc,#8		@ sha256_block_data_order
 	add	$len,$inp,$len,lsl#6	@ len to point at the end of inp
-	stmdb	sp!,{$ctx,$inp,$len,r4-r12,lr}
+	stmdb	sp!,{$ctx,$inp,$len,r4-r11,lr}
 	ldmia	$ctx,{$A,$B,$C,$D,$E,$F,$G,$H}
 	sub	$Ktbl,r3,#256		@ K256
 	sub	sp,sp,#16*4		@ alloca(X[16])
@@ -171,10 +192,14 @@ $code.=<<___;
 	bne	.Loop
 
 	add	sp,sp,#`16+3`*4	@ destroy frame
-	ldmia	sp!,{r4-r12,lr}
+#if __ARM_ARCH__>=5
+	ldmia	sp!,{r4-r11,pc}
+#else
+	ldmia	sp!,{r4-r11,lr}
 	tst	lr,#1
 	moveq	pc,lr			@ be binary compatible with V4, yet
 	bx	lr			@ interoperable with Thumb ISA:-)
+#endif
 .size   sha256_block_data_order,.-sha256_block_data_order
 .asciz  "SHA256 block transform for ARMv4, CRYPTOGAMS by <appro\@openssl.org>"
 .align	2
-- 
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