[U-Boot] [PATCH v2 14/20] x86: Dont clobber %eax after getting memory size
Graeme Russ
graeme.russ at gmail.com
Tue Oct 5 13:19:20 CEST 2010
By using another register, reduce code size by one instruction
Signed-off-by: Graeme Russ <graeme.russ at gmail.com>
---
arch/i386/cpu/start.S | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/arch/i386/cpu/start.S b/arch/i386/cpu/start.S
index 63f7334..66ff4f3 100644
--- a/arch/i386/cpu/start.S
+++ b/arch/i386/cpu/start.S
@@ -114,8 +114,8 @@ mem_ok:
/* Test the stack */
pushl $0
- popl %eax
- cmpl $0, %eax
+ popl %ecx
+ cmpl $0, %ecx
jne die
push $0x55aa55aa
popl %ecx
@@ -125,7 +125,6 @@ mem_ok:
wbinvd
/* Set the upper memory limit parameter */
- movl %esp, %eax
subl $CONFIG_SYS_STACK_SIZE, %eax
call board_init_f /* Enter, U-boot! */
--
1.7.1.422.g049e9
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