.importzp TEMP
.import popa, popax
.include "zpvars.inc"
.export _memfill

;void __fastcall__ memfill(void *dst,unsigned char value,unsigned int len);

_memfill:

	sta <LEN
	stx <LEN+1
	jsr popa
	sta <TEMP
	jsr popax
	sta <DST
	stx <DST+1

	ldx #0

@1:

	lda <LEN+1
	beq @2
	jsr @3
	dec <LEN+1
	inc <DST+1
	jmp @1

@2:

	ldx <LEN
	beq @5

@3:

	ldy #0
	lda <TEMP

@4:

	sta (DST),y
	iny
	dex
	bne @4

@5:

	rts