mirror of
https://github.com/cc65/cc65.git
synced 2024-12-27 00:29:31 +00:00
25 lines
351 B
ArmAsm
25 lines
351 B
ArmAsm
;
|
|
; Piotr Fusik, 24.10.2003
|
|
; originally by Ullrich von Bassewitz
|
|
;
|
|
; CC65 runtime: Decrement the stackpointer by value in y
|
|
;
|
|
|
|
.export subysp
|
|
.importzp sp
|
|
|
|
.proc subysp
|
|
|
|
tya
|
|
eor #$ff
|
|
sec
|
|
adc sp
|
|
sta sp
|
|
bcs @L1
|
|
dec sp+1
|
|
@L1: rts
|
|
|
|
.endproc
|
|
|
|
|