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dolphin/Source/Plugins/Plugin_VideoOGL/Src/OpcodeDecoding.cpp

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// Copyright (C) 2003-2008 Dolphin Project.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 2.0.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License 2.0 for more details.
// A copy of the GPL 2.0 should have been included with the program.
// If not, see http://www.gnu.org/licenses/
// Official SVN repository and contact information can be found at
// http://code.google.com/p/dolphin-emu/
//DL facts:
// Ikaruga uses NO display lists!
// Zelda WW uses TONS of display lists
// Zelda TP uses almost 100% display lists except menus (we like this!)
// Note that it IS NOT POSSIBLE to precompile display lists! You can compile them as they are
// and hope that the vertex format doesn't change, though, if you do it just when they are
// called. The reason is that the vertex format affects the sizes of the vertices.
#include "Globals.h"
#include "Profiler.h"
#include "OpcodeDecoding.h"
#include "VertexLoader.h"
#include "VertexShaderManager.h"
#include "TextureMngr.h"
#include "BPStructs.h"
#include "Fifo.h"
#include "DataReader.h"
#define CMDBUFFER_SIZE 1024*1024
#if ! defined(DATAREADER_INLINE) || defined(DATAREADER_DEBUG)
CDataReader_Fifo g_fifoReader;
#endif
#ifdef DATAREADER_DEBUG
u8* g_pDataReaderRealPtr=0;
#endif
#ifdef DATAREADER_INLINE
u8* g_pVideoData=0;
extern bool g_IsFifoRewinded;
#endif
void Decode();
#if !defined(DATAREADER_INLINE) || defined(DATAREADER_DEBUG)
extern u8 FAKE_PeekFifo8(u32 _uOffset);
extern u16 FAKE_PeekFifo16(u32 _uOffset);
extern u32 FAKE_PeekFifo32(u32 _uOffset);
extern int FAKE_GetFifoSize();
#endif
extern u8* FAKE_GetFifoEndPtr();
extern u8* FAKE_GetFifoStartPtr();
extern u8* FAKE_GetFifoCurrentPtr();
extern void FAKE_SkipFifo(u32 skip);
template <class T>
void Xchg(T& a, T&b)
{
T c = a;
a = b;
b = c;
}
void ExecuteDisplayList(u32 address, u32 size)
{
#if ! defined(DATAREADER_INLINE) || defined(DATAREADER_DEBUG)
IDataReader* pOldReader = g_pDataReader;
//address &= 0x01FFFFFF; // phys address
CDataReader_Memory memoryReader(address);
g_pDataReader = &memoryReader;
#endif
#ifdef DATAREADER_INLINE
u8* old_pVideoData = g_pVideoData;
u8* startAddress = Memory_GetPtr(address);
g_pVideoData = startAddress;
#endif
// temporarily swap dl and non-dl(small "hack" for the stats)
Xchg(stats.thisFrame.numDLPrims, stats.thisFrame.numPrims);
Xchg(stats.thisFrame.numXFLoadsInDL, stats.thisFrame.numXFLoads);
Xchg(stats.thisFrame.numCPLoadsInDL, stats.thisFrame.numCPLoads);
Xchg(stats.thisFrame.numBPLoadsInDL, stats.thisFrame.numBPLoads);
#ifdef DATAREADER_INLINE
while((g_pVideoData - startAddress) < size)
#else
while((memoryReader.GetReadAddress() - address) < size)
#endif
{
Decode();
}
INCSTAT(stats.numDListsCalled);
INCSTAT(stats.thisFrame.numDListsCalled);
// un-swap
Xchg(stats.thisFrame.numDLPrims, stats.thisFrame.numPrims);
Xchg(stats.thisFrame.numXFLoadsInDL, stats.thisFrame.numXFLoads);
Xchg(stats.thisFrame.numCPLoadsInDL, stats.thisFrame.numCPLoads);
Xchg(stats.thisFrame.numBPLoadsInDL, stats.thisFrame.numBPLoads);
// reset to the old reader
#ifdef DATAREADER_INLINE
g_pVideoData = old_pVideoData;
#endif
#if defined(DATAREADER_DEBUG) || !defined(DATAREADER_INLINE)
g_pDataReader = pOldReader;
#endif
}
bool FifoCommandRunnable(void)
{
#ifndef DATAREADER_INLINE
u32 iBufferSize = FAKE_GetFifoSize();
#else
u32 iBufferSize = (u32)(FAKE_GetFifoEndPtr()-g_pVideoData);
#ifdef DATAREADER_DEBUG
u32 iBufferSizedb = FAKE_GetFifoSize();
if( iBufferSize != iBufferSizedb) _asm int 3
#endif
#endif
if (iBufferSize == 0)
return false;
#if !defined(DATAREADER_INLINE)
u8 Cmd = FAKE_PeekFifo8(0);
#else
u8 Cmd = DataPeek8(0);
#ifdef DATAREADER_DEBUG
if( Cmd != FAKE_PeekFifo8(0)) _asm int 3
#endif
#endif
u32 iCommandSize = 0;
switch(Cmd)
{
case GX_NOP:
// Hm, this means that we scan over nop streams pretty slowly...
iCommandSize = 1;
break;
case GX_LOAD_CP_REG:
iCommandSize = 6;
break;
case GX_LOAD_INDX_A:
case GX_LOAD_INDX_B:
case GX_LOAD_INDX_C:
case GX_LOAD_INDX_D:
iCommandSize = 5;
break;
case GX_CMD_CALL_DL:
iCommandSize = 9;
break;
case 0x44:
iCommandSize = 1;
// zelda 4 swords calls it and checks the metrics registers after that
break;
case GX_CMD_INVL_VC: // invalid vertex cache - no parameter?
iCommandSize = 1;
break;
case GX_LOAD_BP_REG:
iCommandSize = 5;
break;
case GX_LOAD_XF_REG:
{
// check if we can read the header
if (iBufferSize >= 5)
{
iCommandSize = 1 + 4;
#if !defined(DATAREADER_INLINE) || defined(DATAREADER_DEBUG)
u32 Cmd2 = FAKE_PeekFifo32(1);
#ifdef DATAREADER_DEBUG
if( Cmd2 != DataPeek32(1)) _asm int 3
#endif
#else
u32 Cmd2 = DataPeek32(1);
#endif
int dwTransferSize = ((Cmd2 >> 16) & 15) + 1;
iCommandSize += dwTransferSize * 4;
}
else
{
return false;
}
}
break;
default:
if (Cmd & 0x80)
{
// check if we can read the header
if (iBufferSize >= 3)
{
iCommandSize = 1 + 2;
#if !defined(DATAREADER_INLINE) || defined(DATAREADER_DEBUG)
u16 numVertices = FAKE_PeekFifo16(1);
#ifdef DATAREADER_DEBUG
if( numVertices != DataPeek16(1)) _asm int 3
#endif
#else
u16 numVertices = DataPeek16(1);
#endif
VertexLoader& vtxLoader = g_VertexLoaders[Cmd & GX_VAT_MASK];
iCommandSize += numVertices * vtxLoader.ComputeVertexSize();
}
else {
return false;
}
}
else {
char szTemp[1024];
sprintf(szTemp, "GFX: Unknown Opcode (0x%x).\n"
"This means one of the following:\n"
"* The emulated GPU got desynced, disabling dual core can help\n"
"* Command stream corrupted by some spurious memory bug\n"
"* This really is an unknown opcode (unlikely)\n"
"* Some other sort of bug\n\n"
"Dolphin will now likely crash or hang. Enjoy.", Cmd);
g_VideoInitialize.pSysMessage(szTemp);
g_VideoInitialize.pLog(szTemp, TRUE);
}
break;
}
if (iCommandSize > iBufferSize)
return false;
// INFO_LOG("OP detected: Cmd 0x%x size %i buffer %i",Cmd, iCommandSize, iBufferSize);
return true;
}
void Decode(void)
{
int Cmd = DataReadU8();
switch(Cmd)
{
case GX_NOP:
break;
case GX_LOAD_CP_REG: //0x08
{
u32 SubCmd = DataReadU8();
u32 Value = DataReadU32();
VertexManager::LoadCPReg(SubCmd,Value);
INCSTAT(stats.thisFrame.numCPLoads);
}
break;
case GX_LOAD_XF_REG:
{
u32 Cmd2 = DataReadU32();
int dwTransferSize = ((Cmd2>>16)&15) + 1;
u32 dwAddress = Cmd2 & 0xFFFF;
static u32 pData[16];
for (int i=0; i<dwTransferSize; i++)
pData[i] = DataReadU32();
VertexShaderMngr::LoadXFReg(dwTransferSize,dwAddress,pData);
INCSTAT(stats.thisFrame.numXFLoads);
}
break;
case GX_LOAD_INDX_A: //used for position matrices
VertexShaderMngr::LoadIndexedXF(DataReadU32(),0xC);
break;
case GX_LOAD_INDX_B: //used for normal matrices
VertexShaderMngr::LoadIndexedXF(DataReadU32(),0xD);
break;
case GX_LOAD_INDX_C: //used for postmatrices
VertexShaderMngr::LoadIndexedXF(DataReadU32(),0xE);
break;
case GX_LOAD_INDX_D: //used for lights
VertexShaderMngr::LoadIndexedXF(DataReadU32(),0xF);
break;
case GX_CMD_CALL_DL:
{
u32 dwAddr = DataReadU32();
u32 dwCount = DataReadU32();
ExecuteDisplayList(dwAddr, dwCount);
}
break;
case 0x44:
// zelda 4 swords calls it and checks the metrics registers after that
break;
case GX_CMD_INVL_VC:// Invalidate (vertex cache?)
DebugLog("Invalidate (vertex cache?)");
break;
case GX_LOAD_BP_REG: //0x61
{
u32 cmd = DataReadU32();
LoadBPReg(cmd);
INCSTAT(stats.thisFrame.numBPLoads);
}
break;
// draw primitives
default:
if (Cmd&0x80)
{
// load vertices (use computed vertex size from FifoCommandRunnable above)
u16 numVertices = DataReadU16();
if (numVertices > 0) {
g_VertexLoaders[Cmd & GX_VAT_MASK].RunVertices((Cmd & GX_PRIMITIVE_MASK) >> GX_PRIMITIVE_SHIFT, numVertices);
}
}
else
{
// char szTmp[256];
//sprintf(szTmp, "Illegal command %02x (at %08x)",Cmd,g_pDataReader->GetPtr());
//g_VideoInitialize.pLog(szTmp);
//MessageBox(0,szTmp,"GFX ERROR",0);
// _assert_msg_(0,szTmp,"");
break;
}
break;
}
}
void OpcodeDecoder_Init()
{
#if !defined(DATAREADER_INLINE)
g_pDataReader = &g_fifoReader;
#else
g_pVideoData = FAKE_GetFifoStartPtr();
#if defined(DATAREADER_DEBUG)
g_pDataReader = &g_fifoReader;
g_pDataReaderRealPtr = g_pDataReader->GetRealCurrentPtr();
DATAREADER_DEBUG_CHECK_PTR;
#endif
#endif
}
void OpcodeDecoder_Shutdown()
{
}
void OpcodeDecoder_Run()
{
DVSTARTPROFILE();
while (FifoCommandRunnable())
{
DATAREADER_DEBUG_CHECK_PTR;
Decode();
}
}
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