mirror of
https://github.com/cc65/cc65.git
synced 2024-11-06 15:06:07 +00:00
29 lines
425 B
ArmAsm
29 lines
425 B
ArmAsm
;
|
|
; Ullrich von Bassewitz, 25.07.2001
|
|
;
|
|
; CC65 runtime: Scale the primary register by 16
|
|
;
|
|
|
|
.export asrax4
|
|
.importzp tmp1
|
|
|
|
asrax4: stx tmp1
|
|
cpx #$80 ; Put bit 7 into carry
|
|
ror tmp1
|
|
ror a
|
|
ldx tmp1
|
|
cpx #$80
|
|
ror tmp1
|
|
ror a
|
|
ldx tmp1
|
|
cpx #$80
|
|
ror tmp1
|
|
ror a
|
|
ldx tmp1
|
|
cpx #$80
|
|
ror tmp1
|
|
ror a
|
|
ldx tmp1
|
|
rts
|
|
|