patch-2.2.18 linux/arch/arm/lib/copy_page.S

• Lines: 36
• Date: Fri Sep 15 23:28:37 2000
• Orig file: v2.2.17/arch/arm/lib/copy_page.S
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/arch/arm/lib/copy_page.S linux/arch/arm/lib/copy_page.S
@@ -0,0 +1,35 @@
+/*
+ * linux/arch/arm/lib/copypage.S
+ *
+ * Copyright (C) 1995-1999 Russell King
+ *
+ * ASM optimised string functions
+ *
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include "constants.h"
+
+		.text 
+/*
+ * StrongARM optimised copy_page routine
+ * now 1.72bytes/cycle, was 1.60 bytes/cycle
+ * (50MHz bus -> 86MB/s)
+ */
+
+ENTRY(copy_page)
+		stmfd	sp!, {r4, lr}			@	2
+		mov	r2, #PAGE_SZ/64			@	1
+1:		ldmia	r1!, {r3, r4, ip, lr}		@	4
+		subs	r2, r2, #1			@	1
+		stmia	r0!, {r3, r4, ip, lr}		@	4
+		ldmia	r1!, {r3, r4, ip, lr}		@	4+1
+		stmia	r0!, {r3, r4, ip, lr}		@	4
+		ldmia	r1!, {r3, r4, ip, lr}		@	4+1
+		stmia	r0!, {r3, r4, ip, lr}		@	4
+		ldmia	r1!, {r3, r4, ip, lr}		@	4+1
+		stmia	r0!, {r3, r4, ip, lr}		@	4
+		bne	1b				@	1
+		LOADREGS(fd, sp!, {r4, pc})		@	3
+
+