You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

20 lines
263 B
ArmAsm

;
; Ullrich von Bassewitz, 06.08.1998
;
; CC65 runtime: Scale the primary register by 4
;
.export asrax2
.importzp tmp1
asrax2: stx tmp1
cpx #$80 ; Put bit 7 into carry
ror tmp1
ror a
cpx #$80
ror tmp1
ror a
ldx tmp1
rts