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/*
* 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
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