;
; Piotr Fusik, 24.10.2003
; originally by Ullrich von Bassewitz
;
; CC65 runtime: Decrement the stackpointer by value in y
;

	.export		subysp
	.importzp	sp

.proc	subysp

	tya
	eor	#$ff
	sec
	adc	sp
	sta	sp
	bcs	@L1
	dec	sp+1
@L1:	rts

.endproc


