blob: cbc0d912e5f35c733a7d565802e2b446c987be24 [file] [log] [blame]
Paul Mundt4466b202008-12-12 16:34:44 +09001/*
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
12strlen:
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
24loop:
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