;
; Ullrich von Bassewitz, 25.07.2001
;
; CC65 runtime: Scale the 32 bit primary register by 16
;

       	.export		asreax4
       	.importzp	sreg, tmp1

asreax4:
       	stx	tmp1
       	ldx    	sreg+1
	ldy	#4
@L1:	cpx	#$80  		; Get bit 7 into carry
       	ror	sreg+1
       	ror	sreg
       	ror	tmp1
       	ror	a
	dey
	bne	@L1
       	ldx	tmp1
       	rts

