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GXFIFO finished. hacktastic integration into the ARM9 loop.

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This commit is contained in:
StapleButter
2017-02-08 00:52:37 +01:00
parent 971e7b7e89
commit 796dc58f71
6 changed files with 140 additions and 15 deletions
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119
GPU3D.cpp
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@ -63,6 +63,43 @@ const u32 CmdNumParams[256] =
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
const s32 CmdNumCycles[256] =
{
// 0x00
0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
// 0x10
1, 17, 36, 17, 36, 19, 34, 30, 35, 31, 28, 22, 22,
0, 0, 0,
// 0x20
1, 9, 1, 9, 8, 8, 8, 8, 8, 1, 1, 1,
0, 0, 0, 0,
// 0x30
4, 4, 6, 1, 32,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
// 0x40
1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
// 0x50
392,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
// 0x60
1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
// 0x70
103, 9, 5,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
// 0x80+
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
typedef struct
{
u8 Command;
@ -77,6 +114,10 @@ u32 NumCommands, CurCommand, ParamCount, TotalParams;
u32 GXStat;
u32 ExecParams[32];
u32 ExecParamCount;
s32 CycleCount;
bool Init()
{
@ -103,13 +144,15 @@ void Reset()
TotalParams = 0;
GXStat = 0;
memset(ExecParams, 0, 32*4);
ExecParamCount = 0;
CycleCount = 0;
}
void CmdFIFOWrite(CmdFIFOEntry entry)
void CmdFIFOWrite(CmdFIFOEntry& entry)
{
printf("GX FIFO: %02X %08X\n", entry.Command, entry.Param);
if (CmdFIFO->IsEmpty() && !CmdPIPE->IsFull())
{
CmdPIPE->Write(entry);
@ -137,6 +180,73 @@ CmdFIFOEntry CmdFIFORead()
if (!CmdFIFO->IsEmpty())
CmdPIPE->Write(CmdFIFO->Read());
}
CheckFIFOIRQ();
return ret;
}
void ExecuteCommand()
{
CmdFIFOEntry entry = CmdFIFORead();
ExecParams[ExecParamCount] = entry.Param;
ExecParamCount++;
if (ExecParamCount >= CmdNumParams[entry.Command])
{
CycleCount += CmdNumCycles[entry.Command];
ExecParamCount = 0;
// TODO: actually execute the command, maybe
//printf("3D CMD %02X\n", entry.Command);
switch (entry.Command)
{
case 0x18:
case 0x19:
case 0x1A:
// TODO: more cycles if MTX_MODE=2
break;
case 0x21:
// TODO: more cycles if lights are enabled
break;
case 0x50:
// TODO: make it happen upon VBlank, not right now
break;
}
}
}
void Run(s32 cycles)
{
if (CycleCount <= 0)
{
while (CycleCount <= 0 && !CmdPIPE->IsEmpty())
ExecuteCommand();
if (CmdPIPE->IsEmpty())
CycleCount = 0;
}
else
CycleCount -= cycles;
}
void CheckFIFOIRQ()
{
bool irq = false;
switch (GXStat >> 30)
{
case 1: irq = (CmdFIFO->Level() < 128); break;
case 2: irq = CmdFIFO->IsEmpty(); break;
}
if (irq) NDS::TriggerIRQ(0, NDS::IRQ_GXFIFO);
}
@ -165,7 +275,8 @@ u32 Read32(u32 addr)
// matrix stack levels, TODO
(fifolevel << 16) |
(fifolevel < 128 ? (1<<25) : 0) |
(fifolevel == 0 ? (1<<26) : 0);
(fifolevel == 0 ? (1<<26) : 0) |
(CycleCount > 0 ? (1<<27) : 0);
}
}
return 0;