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Implement SetRCnt (#1153)

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https://decomp.me/scratch/jawso
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Josh Lory 2024-05-20 18:24:18 -07:00 committed by GitHub
parent eae3cfbe94
commit 613e268609
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1 changed files with 32 additions and 4 deletions
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36
src/main/psxsdk/libapi/counter.c
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@ -3,9 +3,10 @@
typedef struct {
u16 rootCounter;
s16 unk2;
s32 mode;
s32 target;
s32 padding;
s16 mode;
s16 : 16;
s16 target;
s32 : 32;
} Counter;
// https://psx-spx.consoledev.net/timers/
@ -14,7 +15,34 @@ extern volatile s32* D_8002D3B4; // _interrupt_status_register
extern volatile Counter* D_8002D3B8; // _counters
extern volatile s32 D_8002D3BC[4]; // _interrupt_status_masks
INCLUDE_ASM("main/nonmatchings/psxsdk/libapi/counter", SetRCnt);
s32 SetRCnt(s32 spec, s16 target, s32 flags) {
s32 i = spec & 0xFFFF;
s32 final_mode = 0x48;
if (i >= 3) {
return 0;
}
D_8002D3B8[i].mode = 0;
D_8002D3B8[i].target = target;
if (i < 2u) {
if (flags & 0x10) {
final_mode = 0x49;
}
if (!(flags & 1)) {
final_mode |= 0x100;
}
} else if (i == 2u) { // nb: `else` is redundant here
if (!(flags & 1)) {
final_mode = 0x248;
}
}
if ((flags & 0x1000) != 0) {
final_mode |= 0x10;
}
D_8002D3B8[i].mode = final_mode;
return 1;
}
long GetRCnt(long spec) {
s32 i = spec & 0xFFFF;