[deliverable/linux.git] / arch / sh / lib64 / strlen.S

/*
 * Simplistic strlen() implementation for SHmedia.
 *
 * Copyright (C) 2003  Paul Mundt <lethal@linux-sh.org>
 */

	.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
Commit	Line	Data
4466b20c PM	1	/*
	2	* Simplistic strlen() implementation for SHmedia.
	3	*
	4	* Copyright (C) 2003 Paul Mundt <lethal@linux-sh.org>
	5	*/
	6
	7	.section .text..SHmedia32,"ax"
	8	.globl strlen
	9	.type strlen,@function
	10
	11	.balign 16
	12	strlen:
	13	ptabs r18, tr4
	14
	15	/*
	16	* Note: We could easily deal with the NULL case here with a simple
	17	* sanity check, though it seems that the behavior we want is to fault
	18	* in the event that r2 == NULL, so we don't bother.
	19	*/
	20	/* beqi r2, 0, tr4 */ ! Sanity check
	21
	22	movi -1, r0
	23	pta/l loop, tr0
	24	loop:
	25	ld.b r2, 0, r1
	26	addi r2, 1, r2
	27	addi r0, 1, r0
	28	bnei/l r1, 0, tr0
	29
	30	or r0, r63, r2
	31	blink tr4, r63
	32
	33	.size strlen,.-strlen