mirror of
https://github.com/cc65/cc65.git
synced 2024-11-18 00:07:21 +00:00
57 lines
1.4 KiB
ArmAsm
57 lines
1.4 KiB
ArmAsm
;
|
|
; Ullrich von Bassewitz, 06.08.1998
|
|
; Christian Krueger, 11-Mar-2017, added 65SC02 optimization
|
|
;
|
|
; CC65 runtime: function epilogue
|
|
;
|
|
|
|
; exit a function. pop stack and rts. The function comes in different
|
|
; flavours that provide default values for the return val, or drop a local
|
|
; stack frame with size in y.
|
|
|
|
.export leave00, leave0, leavey00, leavey0, leavey
|
|
.export leave
|
|
.import addysp
|
|
.importzp sp
|
|
|
|
.macpack cpu
|
|
|
|
leave00:
|
|
lda #0
|
|
leave0: ldx #0
|
|
beq leave
|
|
|
|
leavey00:
|
|
lda #0 ; "return 0"
|
|
leavey0:
|
|
ldx #0 ; return < 256
|
|
leavey:
|
|
jsr addysp ; drop stack frame
|
|
|
|
.if (.cpu .bitand ::CPU_ISET_65SC02)
|
|
|
|
leave: tay ; save A a sec
|
|
lda (sp) ; that's the pushed arg size
|
|
sec ; Count the byte, the count's stored in
|
|
adc sp
|
|
sta sp
|
|
bcc L1
|
|
inc sp+1
|
|
L1: tya ; Get return value back
|
|
|
|
.else
|
|
|
|
leave: pha ; save A a sec
|
|
ldy #0
|
|
lda (sp),y ; that's the pushed arg size
|
|
sec ; Count the byte, the count's stored in
|
|
adc sp
|
|
sta sp
|
|
bcc L1
|
|
inc sp+1
|
|
L1: pla ; Get return value back
|
|
|
|
.endif
|
|
rts
|
|
|