mirror of
https://github.com/cc65/cc65.git
synced 2024-11-02 18:06:48 +00:00
24 lines
571 B
ArmAsm
24 lines
571 B
ArmAsm
|
;
|
||
|
|
; Ullrich von Bassewitz, 07.08.1998
|
||
|
|
;
|
||
|
|
; CC65 runtime: modulo operation for signed ints
|
||
|
|
;
|
||
|
|
|
||
|
|
; When negating values, we will ignore the possibility here, that one of the
|
||
|
|
; values if $8000, in which case the negate will fail.
|
||
|
|
|
||
|
|
.export tosmoda0, tosmodax
|
||
|
|
.import popsargs, udiv16, adjsres
|
||
|
|
.importzp ptr1
|
||
|
|
|
||
|
|
tosmoda0:
|
||
|
|
ldx #0
|
||
|
|
tosmodax:
|
||
|
|
jsr popsargs ; Get arguments from stack, adjust sign
|
||
|
|
jsr udiv16 ; Do the division
|
||
|
|
lda ptr1 ; Result is in sreg, remainder in ptr1
|
||
|
|
ldx ptr1+1
|
||
|
|
jmp adjsres ; Adjust the sign of the result if needed
|
||
|
|
|
||
|
|
|