mirror of
https://github.com/cc65/cc65.git
synced 2024-10-30 12:28:25 +00:00
31 lines
299 B
ArmAsm
31 lines
299 B
ArmAsm
;
|
|
; Ullrich von Bassewitz, 16.03.2002
|
|
;
|
|
; CC65 runtime: Multiply the primary register
|
|
;
|
|
|
|
.export mulax6
|
|
.importzp ptr1
|
|
|
|
.proc mulax6
|
|
|
|
sta ptr1
|
|
stx ptr1+1
|
|
asl a
|
|
rol ptr1+1
|
|
clc
|
|
adc ptr1
|
|
pha
|
|
txa
|
|
adc ptr1+1
|
|
sta ptr1+1
|
|
pla
|
|
asl a
|
|
rol ptr1+1
|
|
ldx ptr1+1
|
|
rts
|
|
|
|
.endproc
|
|
|
|
|