1
0
mirror of https://github.com/cc65/cc65.git synced 2024-12-24 11:31:31 +00:00
cc65/libsrc/runtime/asrax4.s

29 lines
425 B
ArmAsm
Raw Normal View History

;
; 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