From 1f6d2076256761b44e7336b496ab0887f90cea69 Mon Sep 17 00:00:00 2001
From: Andy Polyakov <appro@openssl.org>
Date: Sat, 14 Jun 2014 15:26:14 +0200
Subject: [PATCH] sha1-x86_64.pl: add missing rex prefix in shaext.

PR: 3405
(cherry picked from commit c9cf29cca22d4d724a1e772bc5fdc201b2822f1d)
---
 crypto/sha/asm/sha1-x86_64.pl | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/crypto/sha/asm/sha1-x86_64.pl b/crypto/sha/asm/sha1-x86_64.pl
index 6dc64a2ead..9aa128ed3a 100755
--- a/crypto/sha/asm/sha1-x86_64.pl
+++ b/crypto/sha/asm/sha1-x86_64.pl
@@ -2030,8 +2030,12 @@ sub sha1op38 {
   		"sha1msg1"  => 0xc9,
 		"sha1msg2"  => 0xca	);
 
-    if (defined($opcodelet{$instr}) && @_[0] =~ /%xmm([0-7]),\s*%xmm([0-7])/) {
+    if (defined($opcodelet{$instr}) && @_[0] =~ /%xmm([0-9]+),\s*%xmm([0-9]+)/) {
       my @opcode=(0x0f,0x38);
+      my $rex=0;
+	$rex|=0x04			if ($2>=8);
+	$rex|=0x01			if ($1>=8);
+	unshift @opcode,0x40|$rex	if ($rex);
 	push @opcode,$opcodelet{$instr};
 	push @opcode,0xc0|($1&7)|(($2&7)<<3);		# ModR/M
 	return ".byte\t".join(',',@opcode);