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2eccf70d695caf87b016c6d69f06f526e55f683b
[fw/sdcc]
/
device
/
lib
/
z80
/
strlen.s
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.area _CODE
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.globl _strlen
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; The Z80 has the cpir instruction, which is perfect for implementing strlen().
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_strlen:
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push ix
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ld ix, #0
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add ix, sp
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ld l, 4(ix)
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ld h, 5(ix)
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xor a, a
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ld b, a
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ld c, a
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cpir
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ld hl, #-1
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sbc hl, bc ; C flag still cleared from xor above.
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pop ix
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ret
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