mirror of
https://github.com/cc65/cc65.git
synced 2024-11-13 13:11:06 +00:00
38 lines
471 B
ArmAsm
38 lines
471 B
ArmAsm
|
;
|
||
|
|
; Ullrich von Bassewitz, 08.10.1998
|
||
|
|
;
|
||
|
|
; CC65 runtime: -= operator for longs on the stack
|
||
|
|
;
|
||
|
|
|
||
|
|
.export lsubeq0sp, lsubeqysp
|
||
|
|
.importzp sp, sreg, tmp1, tmp2
|
||
|
|
|
||
|
|
lsubeq0sp:
|
||
|
|
ldy #0
|
||
|
|
lsubeqysp:
|
||
|
|
sec
|
||
|
|
sta tmp1
|
||
|
|
stx tmp2
|
||
|
|
lda (sp),y
|
||
|
|
sbc tmp1
|
||
|
|
sta (sp),y
|
||
|
|
pha
|
||
|
|
iny
|
||
|
|
lda (sp),y
|
||
|
|
sbc tmp2
|
||
|
|
sta (sp),y
|
||
|
|
tax
|
||
|
|
iny
|
||
|
|
lda (sp),y
|
||
|
|
sbc sreg
|
||
|
|
sta (sp),y
|
||
|
|
sta sreg
|
||
|
|
iny
|
||
|
|
lda (sp),y
|
||
|
|
sbc sreg+1
|
||
|
|
sta (sp),y
|
||
|
|
sta sreg+1
|
||
|
|
pla
|
||
|
|
rts
|
||
|
|
|