1
0
mirror of https://github.com/cc65/cc65.git synced 2024-11-17 09:07:32 +00:00
cc65/libsrc/runtime/asrax3.s

24 lines
291 B
ArmAsm
Raw Normal View History

;
; Piotr Fusik, 24.10.2003
; originally by Ullrich von Bassewitz
;
; CC65 runtime: Scale the primary register by 8
;
.export asrax3
.importzp tmp1
asrax3: stx tmp1
cpx #$80 ; Put bit 7 into carry
ror tmp1
ror a
cpx #$80
ror tmp1
ror a
cpx #$80
ror tmp1
ror a
ldx tmp1
rts