dolphin/Source/Core/VideoCommon/OpcodeDecoding.cpp

269 lines
6.7 KiB
C++

// Copyright 2013 Dolphin Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.
//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!)
// Super Mario Galaxy has nearly all geometry and more than half of the state in DLs (great!)
// Note that it IS NOT GENERALLY POSSIBLE to precompile display lists! You can compile them as they are
// while interpreting them, and hope that the vertex format doesn't change, though, if you do it right
// when they are called. The reason is that the vertex format affects the sizes of the vertices.
#include "Common/CommonTypes.h"
#include "Common/CPUDetect.h"
#include "Core/Core.h"
#include "Core/Host.h"
#include "Core/FifoPlayer/FifoRecorder.h"
#include "Core/HW/Memmap.h"
#include "VideoCommon/BPMemory.h"
#include "VideoCommon/CommandProcessor.h"
#include "VideoCommon/CPMemory.h"
#include "VideoCommon/DataReader.h"
#include "VideoCommon/Fifo.h"
#include "VideoCommon/OpcodeDecoding.h"
#include "VideoCommon/Statistics.h"
#include "VideoCommon/VertexLoaderManager.h"
#include "VideoCommon/VideoCommon.h"
#include "VideoCommon/VideoConfig.h"
#include "VideoCommon/XFMemory.h"
u8* g_pVideoData = nullptr;
bool g_bRecordFifoData = false;
static u32 InterpretDisplayList(u32 address, u32 size)
{
u8* old_pVideoData = g_pVideoData;
u8* startAddress = Memory::GetPointer(address);
u32 cycles = 0;
// Avoid the crash if Memory::GetPointer failed ..
if (startAddress != nullptr)
{
g_pVideoData = startAddress;
// temporarily swap dl and non-dl (small "hack" for the stats)
Statistics::SwapDL();
u8 *end = g_pVideoData + size;
cycles = OpcodeDecoder_Run(end);
INCSTAT(stats.thisFrame.numDListsCalled);
// un-swap
Statistics::SwapDL();
}
// reset to the old pointer
g_pVideoData = old_pVideoData;
return cycles;
}
static void UnknownOpcode(u8 cmd_byte, void *buffer, bool preprocess)
{
// TODO(Omega): Maybe dump FIFO to file on this error
std::string temp = StringFromFormat(
"GFX FIFO: Unknown Opcode (0x%x @ %p).\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_byte,
buffer);
Host_SysMessage(temp.c_str());
INFO_LOG(VIDEO, "%s", temp.c_str());
{
SCPFifoStruct &fifo = CommandProcessor::fifo;
std::string tmp = StringFromFormat(
"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_BPInt: %s\n"
"bFF_Breakpoint: %s\n"
,cmd_byte, 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_BPInt ? "true" : "false"
,fifo.bFF_Breakpoint ? "true" : "false");
Host_SysMessage(tmp.c_str());
INFO_LOG(VIDEO, "%s", tmp.c_str());
}
}
static u32 Decode(u8* end)
{
u8 *opcodeStart = g_pVideoData;
if (g_pVideoData == end)
return 0;
u8 cmd_byte = DataReadU8();
u32 cycles;
switch (cmd_byte)
{
case GX_NOP:
cycles = 6; // Hm, this means that we scan over nop streams pretty slowly...
break;
case GX_LOAD_CP_REG: //0x08
{
if (end - g_pVideoData < 1 + 4)
return 0;
cycles = 12;
u8 sub_cmd = DataReadU8();
u32 value = DataReadU32();
LoadCPReg(sub_cmd, value);
INCSTAT(stats.thisFrame.numCPLoads);
}
break;
case GX_LOAD_XF_REG:
{
if (end - g_pVideoData < 4)
return 0;
u32 Cmd2 = DataReadU32();
int transfer_size = ((Cmd2 >> 16) & 15) + 1;
if ((size_t) (end - g_pVideoData) < transfer_size * sizeof(u32))
return 0;
cycles = 18 + 6 * transfer_size;
u32 xf_address = Cmd2 & 0xFFFF;
LoadXFReg(transfer_size, xf_address);
INCSTAT(stats.thisFrame.numXFLoads);
}
break;
case GX_LOAD_INDX_A: //used for position matrices
if (end - g_pVideoData < 4)
return 0;
cycles = 6;
LoadIndexedXF(DataReadU32(), 0xC);
break;
case GX_LOAD_INDX_B: //used for normal matrices
if (end - g_pVideoData < 4)
return 0;
cycles = 6;
LoadIndexedXF(DataReadU32(), 0xD);
break;
case GX_LOAD_INDX_C: //used for postmatrices
if (end - g_pVideoData < 4)
return 0;
cycles = 6;
LoadIndexedXF(DataReadU32(), 0xE);
break;
case GX_LOAD_INDX_D: //used for lights
if (end - g_pVideoData < 4)
return 0;
cycles = 6;
LoadIndexedXF(DataReadU32(), 0xF);
break;
case GX_CMD_CALL_DL:
{
if (end - g_pVideoData < 8)
return 0;
u32 address = DataReadU32();
u32 count = DataReadU32();
cycles = 6 + InterpretDisplayList(address, count);
}
break;
case GX_CMD_UNKNOWN_METRICS: // zelda 4 swords calls it and checks the metrics registers after that
cycles = 6;
DEBUG_LOG(VIDEO, "GX 0x44: %08x", cmd_byte);
break;
case GX_CMD_INVL_VC: // Invalidate Vertex Cache
cycles = 6;
DEBUG_LOG(VIDEO, "Invalidate (vertex cache?)");
break;
case GX_LOAD_BP_REG: //0x61
// In skipped_frame case: We have to let BP writes through because they set
// tokens and stuff. TODO: Call a much simplified LoadBPReg instead.
{
if (end - g_pVideoData < 4)
return 0;
cycles = 12;
u32 bp_cmd = DataReadU32();
LoadBPReg(bp_cmd);
INCSTAT(stats.thisFrame.numBPLoads);
}
break;
// draw primitives
default:
if ((cmd_byte & 0xC0) == 0x80)
{
cycles = 1600;
// load vertices
if (end - g_pVideoData < 2)
return 0;
u16 numVertices = DataReadU16();
if (!VertexLoaderManager::RunVertices(
cmd_byte & GX_VAT_MASK, // Vertex loader index (0 - 7)
(cmd_byte & GX_PRIMITIVE_MASK) >> GX_PRIMITIVE_SHIFT,
numVertices,
end - g_pVideoData,
g_bSkipCurrentFrame))
{
return 0;
}
}
else
{
UnknownOpcode(cmd_byte, opcodeStart, false);
cycles = 1;
}
break;
}
// Display lists get added directly into the FIFO stream
if (g_bRecordFifoData && cmd_byte != GX_CMD_CALL_DL)
FifoRecorder::GetInstance().WriteGPCommand(opcodeStart, u32(g_pVideoData - opcodeStart));
return cycles;
}
void OpcodeDecoder_Init()
{
g_pVideoData = GetVideoBufferStartPtr();
}
void OpcodeDecoder_Shutdown()
{
}
u32 OpcodeDecoder_Run(u8* end)
{
u32 totalCycles = 0;
while (true)
{
u8* old = g_pVideoData;
u32 cycles = Decode(end);
if (cycles == 0)
{
g_pVideoData = old;
break;
}
totalCycles += cycles;
}
return totalCycles;
}