;
; Ullrich von Bassewitz, 25.07.2001
; CC65 runtime: Scale the 32 bit primary register by 16
.export shreax4
.importzp sreg, tmp1
shreax4:
stx tmp1
ldx #4
@L1: lsr sreg+1
ror sreg
ror tmp1
ror a
dex
bne @L1
ldx tmp1
rts