TF-A Aarch32: optimise memcpy4()
This patch makes optimisation of Aarch32 memcpy4()
function.
Change-Id: If9cdaa4a1224f88fb14df8a308a645344b6c4f1c
Signed-off-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
diff --git a/lib/aarch32/misc_helpers.S b/lib/aarch32/misc_helpers.S
index 6d2ec1c..e9734ac 100644
--- a/lib/aarch32/misc_helpers.S
+++ b/lib/aarch32/misc_helpers.S
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2020, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -149,17 +149,16 @@
blo m_loop1
ldr r3, [r1], #4
str r3, [r0], #4
- sub r2, r2, #4
- b m_loop4
+ subs r2, r2, #4
+ bne m_loop4
+ bx lr
+
/* copy byte per byte */
m_loop1:
- cmp r2,#0
- beq m_end
ldrb r3, [r1], #1
strb r3, [r0], #1
subs r2, r2, #1
bne m_loop1
-m_end:
bx lr
endfunc memcpy4