From 4466b20cfcfa718ff515b9e3886749cc025e2005 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Fri, 12 Dec 2008 16:34:44 +0900 Subject: sh: Add SH-5 optimized memcpy()/memset()/strcpy()/strlen(). Adopted from the uClibc optimized string versions. Signed-off-by: Paul Mundt --- arch/sh/lib64/strlen.S | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 arch/sh/lib64/strlen.S (limited to 'arch/sh/lib64/strlen.S') diff --git a/arch/sh/lib64/strlen.S b/arch/sh/lib64/strlen.S new file mode 100644 index 000000000000..cbc0d912e5f3 --- /dev/null +++ b/arch/sh/lib64/strlen.S @@ -0,0 +1,33 @@ +/* + * Simplistic strlen() implementation for SHmedia. + * + * Copyright (C) 2003 Paul Mundt + */ + + .section .text..SHmedia32,"ax" + .globl strlen + .type strlen,@function + + .balign 16 +strlen: + ptabs r18, tr4 + + /* + * Note: We could easily deal with the NULL case here with a simple + * sanity check, though it seems that the behavior we want is to fault + * in the event that r2 == NULL, so we don't bother. + */ +/* beqi r2, 0, tr4 */ ! Sanity check + + movi -1, r0 + pta/l loop, tr0 +loop: + ld.b r2, 0, r1 + addi r2, 1, r2 + addi r0, 1, r0 + bnei/l r1, 0, tr0 + + or r0, r63, r2 + blink tr4, r63 + + .size strlen,.-strlen -- cgit