mirror of
https://github.com/cc65/cc65.git
synced 2024-11-05 08:05:51 +00:00
53 lines
714 B
ArmAsm
53 lines
714 B
ArmAsm
|
;
|
||
|
|
; Ullrich von Bassewitz, 25.10.2000
|
||
|
|
;
|
||
|
|
; CC65 runtime: Convert tos from int to long
|
||
|
|
;
|
||
|
|
|
||
|
|
.export tosulong, toslong
|
||
|
|
.import decsp2
|
||
|
|
.importzp sp
|
||
|
|
|
||
|
|
; Convert TOS from int to long
|
||
|
|
|
||
|
|
tosulong:
|
||
|
|
pha
|
||
|
|
jsr decsp2 ; Make room
|
||
|
|
ldy #2
|
||
|
|
lda (sp),y
|
||
|
|
ldy #0
|
||
|
|
sta (sp),y
|
||
|
|
ldy #3
|
||
|
|
lda (sp),y
|
||
|
|
ldy #1
|
||
|
|
sta (sp),y
|
||
|
|
lda #0 ; Zero extend
|
||
|
|
toslong2:
|
||
|
|
iny
|
||
|
|
sta (sp),y
|
||
|
|
iny
|
||
|
|
sta (sp),y
|
||
|
|
pla
|
||
|
|
rts
|
||
|
|
|
||
|
|
toslong:
|
||
|
|
pha
|
||
|
|
jsr decsp2 ; Make room
|
||
|
|
ldy #2
|
||
|
|
lda (sp),y
|
||
|
|
ldy #0
|
||
|
|
sta (sp),y
|
||
|
|
ldy #3
|
||
|
|
lda (sp),y
|
||
|
|
bmi toslong1
|
||
|
|
ldy #1
|
||
|
|
sta (sp),y
|
||
|
|
lda #$00 ; Positive, high word is zero
|
||
|
|
bne toslong2
|
||
|
|
toslong1:
|
||
|
|
ldy #1
|
||
|
|
sta (sp),y
|
||
|
|
lda #$FF
|
||
|
|
bne toslong2
|
||
|
|
|