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dolphin/Source/Core/VideoCommon/OpcodeDecoding.cpp

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// Copyright 2008 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/MsgHandler.h"
#include "Common/Logging/Log.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/XFMemory.h"
bool g_bRecordFifoData = false;
static bool s_bFifoErrorSeen = false;
static u32 InterpretDisplayList(u32 address, u32 size)
{
u8* startAddress;
if (Fifo::g_use_deterministic_gpu_thread)
startAddress = (u8*)Fifo::PopFifoAuxBuffer(size);
else
startAddress = Memory::GetPointer(address);
u32 cycles = 0;
// Avoid the crash if Memory::GetPointer failed ..
if (startAddress != nullptr)
{
// temporarily swap dl and non-dl (small "hack" for the stats)
Statistics::SwapDL();
OpcodeDecoder_Run(DataReader(startAddress, startAddress + size), &cycles, true);
INCSTAT(stats.thisFrame.numDListsCalled);
// un-swap
Statistics::SwapDL();
}
return cycles;
}
static void InterpretDisplayListPreprocess(u32 address, u32 size)
{
u8* startAddress = Memory::GetPointer(address);
Fifo::PushFifoAuxBuffer(startAddress, size);
if (startAddress != nullptr)
{
OpcodeDecoder_Run<true>(DataReader(startAddress, startAddress + size), nullptr, true);
}
}
static void UnknownOpcode(u8 cmd_byte, void *buffer, bool preprocess)
{
// TODO(Omega): Maybe dump FIFO to file on this error
PanicAlertT(
"GFX FIFO: Unknown Opcode (0x%02x @ %p, %s).\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"
"Further errors will be sent to the Video Backend log and\n"
"Dolphin will now likely crash or hang. Enjoy." ,
cmd_byte,
buffer,
preprocess ? "preprocess=true" : "preprocess=false");
{
SCPFifoStruct &fifo = CommandProcessor::fifo;
PanicAlert(
"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"
"bFF_GPLinkEnable: %s\n"
"bFF_HiWatermarkInt: %s\n"
"bFF_LoWatermarkInt: %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"
,fifo.bFF_GPLinkEnable ? "true" : "false"
,fifo.bFF_HiWatermarkInt ? "true" : "false"
,fifo.bFF_LoWatermarkInt ? "true" : "false"
);
}
}
void OpcodeDecoder_Init()
{
s_bFifoErrorSeen = false;
}
void OpcodeDecoder_Shutdown()
{
}
template <bool is_preprocess>
u8* OpcodeDecoder_Run(DataReader src, u32* cycles, bool in_display_list)
{
u32 totalCycles = 0;
u8* opcodeStart;
while (true)
{
opcodeStart = src.GetPointer();
if (!src.size())
goto end;
u8 cmd_byte = src.Read<u8>();
int refarray;
switch (cmd_byte)
{
case GX_NOP:
totalCycles += 6; // Hm, this means that we scan over nop streams pretty slowly...
break;
case GX_UNKNOWN_RESET:
totalCycles += 6; // Datel software uses this command
DEBUG_LOG(VIDEO, "GX Reset?: %08x", cmd_byte);
break;
case GX_LOAD_CP_REG:
{
if (src.size() < 1 + 4)
goto end;
totalCycles += 12;
u8 sub_cmd = src.Read<u8>();
u32 value = src.Read<u32>();
LoadCPReg(sub_cmd, value, is_preprocess);
if (!is_preprocess)
INCSTAT(stats.thisFrame.numCPLoads);
}
break;
case GX_LOAD_XF_REG:
{
if (src.size() < 4)
goto end;
u32 Cmd2 = src.Read<u32>();
int transfer_size = ((Cmd2 >> 16) & 15) + 1;
if (src.size() < transfer_size * sizeof(u32))
goto end;
totalCycles += 18 + 6 * transfer_size;
if (!is_preprocess)
{
u32 xf_address = Cmd2 & 0xFFFF;
LoadXFReg(transfer_size, xf_address, src);
INCSTAT(stats.thisFrame.numXFLoads);
}
src.Skip<u32>(transfer_size);
}
break;
case GX_LOAD_INDX_A: //used for position matrices
refarray = 0xC;
goto load_indx;
case GX_LOAD_INDX_B: //used for normal matrices
refarray = 0xD;
goto load_indx;
case GX_LOAD_INDX_C: //used for postmatrices
refarray = 0xE;
goto load_indx;
case GX_LOAD_INDX_D: //used for lights
refarray = 0xF;
goto load_indx;
load_indx:
if (src.size() < 4)
goto end;
totalCycles += 6;
if (is_preprocess)
PreprocessIndexedXF(src.Read<u32>(), refarray);
else
LoadIndexedXF(src.Read<u32>(), refarray);
break;
case GX_CMD_CALL_DL:
{
if (src.size() < 8)
goto end;
u32 address = src.Read<u32>();
u32 count = src.Read<u32>();
if (in_display_list)
{
totalCycles += 6;
WARN_LOG(VIDEO,"recursive display list detected");
}
else
{
if (is_preprocess)
InterpretDisplayListPreprocess(address, count);
else
totalCycles += 6 + InterpretDisplayList(address, count);
}
}
break;
case GX_CMD_UNKNOWN_METRICS: // zelda 4 swords calls it and checks the metrics registers after that
totalCycles += 6;
DEBUG_LOG(VIDEO, "GX 0x44: %08x", cmd_byte);
break;
case GX_CMD_INVL_VC: // Invalidate Vertex Cache
totalCycles += 6;
DEBUG_LOG(VIDEO, "Invalidate (vertex cache?)");
break;
case GX_LOAD_BP_REG:
// 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 (src.size() < 4)
goto end;
totalCycles += 12;
u32 bp_cmd = src.Read<u32>();
if (is_preprocess)
{
LoadBPRegPreprocess(bp_cmd);
}
else
{
LoadBPReg(bp_cmd);
INCSTAT(stats.thisFrame.numBPLoads);
}
}
break;
// draw primitives
default:
if ((cmd_byte & 0xC0) == 0x80)
{
// load vertices
if (src.size() < 2)
goto end;
u16 num_vertices = src.Read<u16>();
int bytes = VertexLoaderManager::RunVertices(
cmd_byte & GX_VAT_MASK, // Vertex loader index (0 - 7)
(cmd_byte & GX_PRIMITIVE_MASK) >> GX_PRIMITIVE_SHIFT,
num_vertices,
src,
Fifo::g_bSkipCurrentFrame,
is_preprocess);
if (bytes < 0)
goto end;
src.Skip(bytes);
// 4 GPU ticks per vertex, 3 CPU ticks per GPU tick
totalCycles += num_vertices * 4 * 3 + 6;
}
else
{
if (!s_bFifoErrorSeen)
UnknownOpcode(cmd_byte, opcodeStart, is_preprocess);
ERROR_LOG(VIDEO, "FIFO: Unknown Opcode(0x%02x @ %p, preprocessing = %s)", cmd_byte, opcodeStart, is_preprocess ? "yes" : "no");
s_bFifoErrorSeen = true;
totalCycles += 1;
}
break;
}
// Display lists get added directly into the FIFO stream
if (!is_preprocess && g_bRecordFifoData && cmd_byte != GX_CMD_CALL_DL)
{
u8* opcodeEnd;
opcodeEnd = src.GetPointer();
FifoRecorder::GetInstance().WriteGPCommand(opcodeStart, u32(opcodeEnd - opcodeStart));
}
}
end:
if (cycles)
{
*cycles = totalCycles;
}
return opcodeStart;
}
template u8* OpcodeDecoder_Run<true>(DataReader src, u32* cycles, bool in_display_list);
template u8* OpcodeDecoder_Run<false>(DataReader src, u32* cycles, bool in_display_list);
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