From ba05b4f1a1ca67a54350441fc0a5792afd2d6fae Mon Sep 17 00:00:00 2001
From: Lukasz Leczkowski <lukasz.leczkowski@phoenix-rtos.com>
Date: Mon, 11 Mar 2024 12:40:47 +0100
Subject: [PATCH] arm/memcpy: optimize register usage

JIRA: RTOS-789
---
 arch/arm/memcpy.S | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/memcpy.S b/arch/arm/memcpy.S
index 39cc56af..155bffd5 100644
--- a/arch/arm/memcpy.S
+++ b/arch/arm/memcpy.S
@@ -15,7 +15,7 @@
 
 #define DST r0
 #define SRC r1
-#define LEN r12
+#define LEN r5
 
 .thumb
 .syntax unified
@@ -42,7 +42,7 @@
 .globl memcpy
 .type memcpy, %function
 memcpy:
-	str DST, [sp, #-8]!
+	push {r0, r5}
 	mov LEN, r2
 	cmp LEN, #64
 
@@ -76,7 +76,7 @@ memcpy:
 	bne 1b
 
 .Lreturn:
-	ldr r0, [sp], #8
+	pop {r0, r5}
 	bx lr