4466b20cfc
Adopted from the uClibc optimized string versions. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
34 lines
632 B
ArmAsm
34 lines
632 B
ArmAsm
/*
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* Simplistic strlen() implementation for SHmedia.
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*
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* Copyright (C) 2003 Paul Mundt <lethal@linux-sh.org>
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*/
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.section .text..SHmedia32,"ax"
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.globl strlen
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.type strlen,@function
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.balign 16
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strlen:
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ptabs r18, tr4
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/*
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* Note: We could easily deal with the NULL case here with a simple
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* sanity check, though it seems that the behavior we want is to fault
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* in the event that r2 == NULL, so we don't bother.
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*/
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/* beqi r2, 0, tr4 */ ! Sanity check
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movi -1, r0
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pta/l loop, tr0
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loop:
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ld.b r2, 0, r1
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addi r2, 1, r2
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addi r0, 1, r0
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bnei/l r1, 0, tr0
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or r0, r63, r2
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blink tr4, r63
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.size strlen,.-strlen
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