diff mbox series

[2/2] arm64: use store with auto-increment

Message ID 1485501330-9718-2-git-send-email-yamada.masahiro@socionext.com
State Accepted
Commit 07a63c7e7de28ddc6cdc7d8c1e75a69b35dc6332
Headers show
Series [1/2] arm64: use xzr to zero-out the bss section | expand

Commit Message

Masahiro Yamada Jan. 27, 2017, 7:15 a.m. UTC 
Save one instruction.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

---

 arch/arm/lib/crt0_64.S | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

-- 
2.7.4

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Comments

Simon Glass Feb. 6, 2017, 3:33 p.m. UTC | #1 
On 26 January 2017 at 23:15, Masahiro Yamada
<yamada.masahiro@socionext.com> wrote:
> Save one instruction.

>

> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

> ---

>

>  arch/arm/lib/crt0_64.S | 3 +--

>  1 file changed, 1 insertion(+), 2 deletions(-)


Reviewed-by: Simon Glass <sjg@chromium.org>

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Tom Rini Feb. 9, 2017, 3:01 a.m. UTC | #2 
On Fri, Jan 27, 2017 at 04:15:30PM +0900, Masahiro Yamada wrote:

> Save one instruction.

> 

> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

> Reviewed-by: Simon Glass <sjg@chromium.org>


Applied to u-boot/master, thanks!

-- 
Tom
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diff mbox series

Patch

diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S
index f8e84b2..19c6a98 100644
--- a/arch/arm/lib/crt0_64.S
+++ b/arch/arm/lib/crt0_64.S
@@ -118,8 +118,7 @@  relocation_return:
 	ldr	x0, =__bss_start		/* this is auto-relocated! */
 	ldr	x1, =__bss_end			/* this is auto-relocated! */
 clear_loop:
-	str	xzr, [x0]
-	add	x0, x0, #8
+	str	xzr, [x0], #8
 	cmp	x0, x1
 	b.lo	clear_loop