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cc65/libsrc/common/strcpy.s
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34 lines
430 B
ArmAsm

;
; Ullrich von Bassewitz, 31.05.1998
;
; char* strcpy (char* dest, const char* src);
;
.export _strcpy
.import popax
.importzp ptr1, ptr2, ptr3
_strcpy:
sta ptr1 ; Save src
stx ptr1+1
jsr popax ; Get dest
sta ptr2
stx ptr2+1
sta ptr3 ; remember for function return
stx ptr3+1
ldy #$00
L1: lda (ptr1),y
sta (ptr2),y
beq L9
iny
bne L1
inc ptr1+1
inc ptr2+1
bne L1
L9: lda ptr3
ldx ptr3+1
rts