// 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 (nearly) 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 GENERALLY 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 "Common.h"
#include "VideoCommon.h"
#include "Profiler.h"
#include "OpcodeDecoding.h"
#include "VertexLoaderManager.h"
#include "Statistics.h"
#include "XFMemory.h"
#include "CPMemory.h"
#include "BPMemory.h"
#include "Fifo.h"
#include "DataReader.h"
u8* g_pVideoData = 0;
extern u8* FAKE_GetFifoStartPtr();
extern u8* FAKE_GetFifoEndPtr();
static void Decode();
static void ExecuteDisplayList(u32 address, u32 size)
{
u8* old_pVideoData = g_pVideoData;
u8* startAddress = Memory_GetPtr(address);
//Avoid the crash if Memory_GetPtr failed ..
if (startAddress!=0)
{
g_pVideoData = startAddress;
// temporarily swap dl and non-dl (small "hack" for the stats)
Statistics::SwapDL();
while ((u32)(g_pVideoData - startAddress) < size)
{
Decode();
}
INCSTAT(stats.numDListsCalled);
INCSTAT(stats.thisFrame.numDListsCalled);
// un-swap
Statistics::SwapDL();
}
// reset to the old pointer
g_pVideoData = old_pVideoData;
}
bool FifoCommandRunnable()
{
u32 iBufferSize = (u32)(FAKE_GetFifoEndPtr() - g_pVideoData);
if (iBufferSize == 0)
return false; // can't peek
u8 Cmd = DataPeek8(0);
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;
u32 Cmd2 = DataPeek32(1);
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;
u16 numVertices = DataPeek16(1);
iCommandSize += numVertices * VertexLoaderManager::GetVertexSize(Cmd & GX_VAT_MASK);
}
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);
{
SCPFifoStruct &fifo = *g_VideoInitialize.pCPFifo;
char szTmp[256];
// sprintf(szTmp, "Illegal command %02x (at %08x)",Cmd,g_pDataReader->GetPtr());
sprintf(szTmp, "Illegal command %02x\n"
"CPBase: 0x%08x\n"
"CPEnd: 0x%08x\n"
"CPHiWatermark: 0x%08x\n"
"CPLoWatermark: 0x%08x\n"
"CPReadWriteDistance: 0x%08x\n"
"CPWritePointer: 0x%08x\n"
"CPReadPointer: 0x%08x\n"
"CPBreakpoint: 0x%08x\n"
"bFF_GPReadEnable: %s\n"
"bFF_BPEnable: %s\n"
"bFF_GPLinkEnable: %s\n"
"bFF_Breakpoint: %s\n"
,Cmd, fifo.CPBase, fifo.CPEnd, fifo.CPHiWatermark, fifo.CPLoWatermark, fifo.CPReadWriteDistance
,fifo.CPWritePointer, fifo.CPReadPointer, fifo.CPBreakpoint, fifo.bFF_GPReadEnable ? "true" : "false"
,fifo.bFF_BPEnable ? "true" : "false" ,fifo.bFF_GPLinkEnable ? "true" : "false"
,fifo.bFF_Breakpoint ? "true" : "false");
g_VideoInitialize.pSysMessage(szTmp);
g_VideoInitialize.pLog(szTmp, TRUE);
// _assert_msg_(0,szTmp,"");
}
}
break;
}
if (iCommandSize > iBufferSize)
return false;
// INFO_LOG("OP detected: Cmd 0x%x size %i buffer %i",Cmd, iCommandSize, iBufferSize);
return true;
}
static void Decode()
{
int Cmd = DataReadU8();
switch(Cmd)
{
case GX_NOP:
break;
case GX_LOAD_CP_REG: //0x08
{
u32 SubCmd = DataReadU8();
u32 Value = DataReadU32();
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;
// TODO - speed this up. pshufb?
static u32 pData[16];
for (int i = 0; i < dwTransferSize; i++)
pData[i] = DataReadU32();
LoadXFReg(dwTransferSize, dwAddress, pData);
INCSTAT(stats.thisFrame.numXFLoads);
}
break;
case GX_LOAD_INDX_A: //used for position matrices
LoadIndexedXF(DataReadU32(), 0xC);
break;
case GX_LOAD_INDX_B: //used for normal matrices
LoadIndexedXF(DataReadU32(), 0xD);
break;
case GX_LOAD_INDX_C: //used for postmatrices
LoadIndexedXF(DataReadU32(), 0xE);
break;
case GX_LOAD_INDX_D: //used for lights
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?)
DEBUG_LOG(VIDEO, "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();
VertexLoaderManager::RunVertices(
Cmd & GX_VAT_MASK, // Vertex loader index (0 - 7)
(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()
{
g_pVideoData = FAKE_GetFifoStartPtr();
}
void OpcodeDecoder_Shutdown()
{
}
void OpcodeDecoder_Run()
{
DVSTARTPROFILE();
while (FifoCommandRunnable())
{
//TODO?: if really needed, do something like this: "InterlockedExchange((LONG*)&_fifo.CPCmdIdle, 0);"
Decode();
}
//TODO?: if really needed, do something like this: "InterlockedExchange((LONG*)&_fifo.CPCmdIdle, 1);"
}