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Unified DISPSTAT representation

This commit is contained in:
Jeffrey Pfau 2014-01-20 14:18:24 -08:00
parent 5a1a04a353
commit 35a5e83465
2 changed files with 25 additions and 32 deletions
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43
src/gba/gba-video.c
View File

@ -132,10 +132,12 @@ int32_t GBAVideoProcessEvents(struct GBAVideo* video, int32_t cycles) {
}
void GBAVideoWriteDISPSTAT(struct GBAVideo* video, uint16_t value) {
video->vblankIRQ = value & 0x0008;
video->hblankIRQ = value & 0x0010;
video->vcounterIRQ = value & 0x0020;
video->vcountSetting = (value & 0xFF00) >> 8;
union GBARegisterDISPSTAT dispstat;
dispstat.packed = value;
video->vblankIRQ = dispstat.vblankIRQ;
video->hblankIRQ = dispstat.hblankIRQ;
video->vcounterIRQ = dispstat.vcounterIRQ;
video->vcountSetting = dispstat.vcountSetting;
if (video->vcounterIRQ) {
// FIXME: this can be too late if we're in the middle of an Hblank
@ -181,26 +183,14 @@ void GBAVideoSerialize(struct GBAVideo* video, struct GBASerializedState* state)
memcpy(state->vram, video->renderer->vram, SIZE_VRAM);
memcpy(state->oam, video->oam.raw, SIZE_OAM);
memcpy(state->pram, video->palette, SIZE_PALETTE_RAM);
union {
struct {
unsigned inVblank : 1;
unsigned inHblank : 1;
unsigned vcounter : 1;
unsigned vblankIRQ : 1;
unsigned hblankIRQ : 1;
unsigned vcounterIRQ : 1;
unsigned : 2;
unsigned vcount : 1;
};
uint32_t packed;
} dispstat;
union GBARegisterDISPSTAT dispstat;
dispstat.inVblank = video->inVblank;
dispstat.inHblank = video->inHblank;
dispstat.vcounter = video->vcounter;
dispstat.vblankIRQ = video->vblankIRQ;
dispstat.hblankIRQ = video->hblankIRQ;
dispstat.vcounterIRQ = video->vcounterIRQ;
dispstat.vcount = video->vcount;
dispstat.vcountSetting = video->vcountSetting;
state->io[REG_DISPSTAT >> 1] = dispstat.packed;
state->video.nextEvent = video->nextEvent;
state->video.eventDiff = video->eventDiff;
@ -218,19 +208,7 @@ void GBAVideoDeserialize(struct GBAVideo* video, struct GBASerializedState* stat
for (i = 0; i < SIZE_PALETTE_RAM; i += 2) {
GBAStore16(&video->p->memory.d, BASE_PALETTE_RAM | i, state->pram[i >> 1], 0);
}
union {
struct {
unsigned inVblank : 1;
unsigned inHblank : 1;
unsigned vcounter : 1;
unsigned vblankIRQ : 1;
unsigned hblankIRQ : 1;
unsigned vcounterIRQ : 1;
unsigned : 2;
unsigned vcount : 1;
};
uint32_t packed;
} dispstat;
union GBARegisterDISPSTAT dispstat;
dispstat.packed = state->io[REG_DISPSTAT >> 1];
video->inVblank = dispstat.inVblank;
video->inHblank = dispstat.inHblank;
@ -238,7 +216,7 @@ void GBAVideoDeserialize(struct GBAVideo* video, struct GBASerializedState* stat
video->vblankIRQ = dispstat.vblankIRQ;
video->hblankIRQ = dispstat.hblankIRQ;
video->vcounterIRQ = dispstat.vcounterIRQ;
video->vcount = dispstat.vcount;
video->vcountSetting = dispstat.vcountSetting;
video->nextEvent = state->video.nextEvent;
video->eventDiff = state->video.eventDiff;
video->lastHblank = state->video.lastHblank;
@ -246,4 +224,5 @@ void GBAVideoDeserialize(struct GBAVideo* video, struct GBASerializedState* stat
video->nextHblankIRQ = state->video.nextHblankIRQ;
video->nextVblankIRQ = state->video.nextVblankIRQ;
video->nextVcounterIRQ = state->video.nextVcounterIRQ;
video->vcount = state->io[REG_VCOUNT >> 1];
}

14
src/gba/gba-video.h
View File

@ -136,6 +136,20 @@ union GBARegisterDISPCNT {
uint16_t packed;
};
union GBARegisterDISPSTAT {
struct {
unsigned inVblank : 1;
unsigned inHblank : 1;
unsigned vcounter : 1;
unsigned vblankIRQ : 1;
unsigned hblankIRQ : 1;
unsigned vcounterIRQ : 1;
unsigned : 2;
unsigned vcountSetting : 8;
};
uint32_t packed;
};
union GBARegisterBGCNT {
struct {
unsigned priority : 2;