mirror of
https://gitlab.com/camelot/kickc.git
synced 2024-06-03 07:29:37 +00:00
72 lines
1.6 KiB
NASM
72 lines
1.6 KiB
NASM
// Test __varcall calling convention
|
|
// Struct parameter & return value
|
|
// Commodore 64 PRG executable file
|
|
.file [name="varcall-6.prg", type="prg", segments="Program"]
|
|
.segmentdef Program [segments="Basic, Code, Data"]
|
|
.segmentdef Basic [start=$0801]
|
|
.segmentdef Code [start=$80d]
|
|
.segmentdef Data [startAfter="Code"]
|
|
.segment Basic
|
|
:BasicUpstart(main)
|
|
.const OFFSET_STRUCT_COLS_BG = 1
|
|
.label COLS = $d020
|
|
.segment Code
|
|
main: {
|
|
.const a_border = 1
|
|
.const a_bg = 2
|
|
// struct Cols c = plus(a, { 2, 3 })
|
|
lda #a_border
|
|
sta.z plus.a_border
|
|
lda #a_bg
|
|
sta.z plus.a_bg
|
|
lda #2
|
|
sta.z plus.b_border
|
|
lda #3
|
|
sta.z plus.b_bg
|
|
jsr plus
|
|
ldx.z plus.return_border
|
|
lda.z plus.return_bg
|
|
// *COLS = c
|
|
stx COLS
|
|
sta COLS+OFFSET_STRUCT_COLS_BG
|
|
// plus(c, a)
|
|
stx.z plus.a_border
|
|
sta.z plus.a_bg
|
|
lda #a_border
|
|
sta.z plus.b_border
|
|
lda #a_bg
|
|
sta.z plus.b_bg
|
|
jsr plus
|
|
// c = plus(c, a)
|
|
ldx.z plus.return_border
|
|
lda.z plus.return_bg
|
|
// *COLS = c
|
|
stx COLS
|
|
sta COLS+OFFSET_STRUCT_COLS_BG
|
|
// }
|
|
rts
|
|
}
|
|
// struct Cols plus(__zp(7) char a_border, __zp(6) char a_bg, __zp(3) char b_border, __zp(2) char b_bg)
|
|
plus: {
|
|
.label a_border = 7
|
|
.label a_bg = 6
|
|
.label b_border = 3
|
|
.label b_bg = 2
|
|
.label return_border = 4
|
|
.label return_bg = 5
|
|
// a.border+b.border
|
|
lda.z a_border
|
|
clc
|
|
adc.z b_border
|
|
tax
|
|
// a.bg+b.bg
|
|
lda.z a_bg
|
|
clc
|
|
adc.z b_bg
|
|
// return { a.border+b.border, a.bg+b.bg };
|
|
stx.z return_border
|
|
sta.z return_bg
|
|
// }
|
|
rts
|
|
}
|