diff options
Diffstat (limited to 'kernel/arch/sh/lib64/strlen.S')
| -rw-r--r-- | kernel/arch/sh/lib64/strlen.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/arch/sh/lib64/strlen.S b/kernel/arch/sh/lib64/strlen.S new file mode 100644 index 000000000..cbc0d912e --- /dev/null +++ b/kernel/arch/sh/lib64/strlen.S @@ -0,0 +1,33 @@ +/* + * 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 |