New patch to review for coreboot: fb66503 use movsl for copying resume memory back

[Stefan Reinauer]

Stefan Reinauer ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/755

-gerrit

commit fb665036abbbaf8face05df7d70fce4d0247bf0b
Author: Stefan Reinauer 
Date:   Thu Nov 17 13:03:38 2011 -0800

use movsl for copying resume memory back

It's not significantly faster, but easier to read and smaller.

Change-Id: Ibab0b478873912d67bf1f07743f628586353368a
    Signed-off-by: Stefan Reinauer 
---
 src/arch/x86/boot/wakeup.S |   20 ++++----------------
 1 files changed, 4 insertions(+), 16 deletions(-)

diff --git a/src/arch/x86/boot/wakeup.S b/src/arch/x86/boot/wakeup.S
index a1df4d5..f12b176 100644
--- a/src/arch/x86/boot/wakeup.S
+++ b/src/arch/x86/boot/wakeup.S
@@ -38,23 +38,11 @@ __wakeup:
    movw	%ax, (__wakeup_segment)

/* Then overwrite coreboot with our backed up memory */
-	movl 8(%esp), %esi
-	movl 12(%esp), %edi
-	movl 16(%esp), %ecx
+	movl	8(%esp), %esi
+	movl	12(%esp), %edi
+	movl	16(%esp), %ecx
    shrl	$4, %ecx
-1:
-	movl	0(%esi),%eax
-	movl	4(%esi),%edx
-	movl	8(%esi),%ebx
-	movl	12(%esi),%ebp
-	addl	$16,%esi
-	subl	$1,%ecx
-	movl	%eax,0(%edi)
-	movl	%edx,4(%edi)
-	movl	%ebx,8(%edi)
-	movl	%ebp,12(%edi)
-	leal	16(%edi),%edi
-	jne	1b
+	rep	movsl

/* Activate the right segment descriptor real mode. */
    ljmp	$0x28, $RELOCATED(1f)