mirror of
https://github.com/dolphin-emu/dolphin.git
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269 lines
6.7 KiB
C++
269 lines
6.7 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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//DL facts:
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// Ikaruga uses (nearly) NO display lists!
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// Zelda WW uses TONS of display lists
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// Zelda TP uses almost 100% display lists except menus (we like this!)
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// Super Mario Galaxy has nearly all geometry and more than half of the state in DLs (great!)
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// Note that it IS NOT GENERALLY POSSIBLE to precompile display lists! You can compile them as they are
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// while interpreting them, and hope that the vertex format doesn't change, though, if you do it right
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// when they are called. The reason is that the vertex format affects the sizes of the vertices.
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#include "Common/Common.h"
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#include "Common/CPUDetect.h"
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#include "Core/Core.h"
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#include "Core/Host.h"
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#include "Core/FifoPlayer/FifoRecorder.h"
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#include "Core/HW/Memmap.h"
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#include "VideoCommon/BPMemory.h"
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#include "VideoCommon/CommandProcessor.h"
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#include "VideoCommon/CPMemory.h"
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#include "VideoCommon/DataReader.h"
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#include "VideoCommon/Fifo.h"
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#include "VideoCommon/OpcodeDecoding.h"
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#include "VideoCommon/Statistics.h"
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#include "VideoCommon/VertexLoaderManager.h"
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#include "VideoCommon/VideoCommon.h"
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#include "VideoCommon/VideoConfig.h"
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#include "VideoCommon/XFMemory.h"
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u8* g_pVideoData = nullptr;
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bool g_bRecordFifoData = false;
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static u32 InterpretDisplayList(u32 address, u32 size)
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{
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u8* old_pVideoData = g_pVideoData;
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u8* startAddress = Memory::GetPointer(address);
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u32 cycles = 0;
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// Avoid the crash if Memory::GetPointer failed ..
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if (startAddress != nullptr)
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{
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g_pVideoData = startAddress;
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// temporarily swap dl and non-dl (small "hack" for the stats)
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Statistics::SwapDL();
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u8 *end = g_pVideoData + size;
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cycles = OpcodeDecoder_Run(end);
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INCSTAT(stats.thisFrame.numDListsCalled);
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// un-swap
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Statistics::SwapDL();
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}
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// reset to the old pointer
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g_pVideoData = old_pVideoData;
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return cycles;
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}
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static void UnknownOpcode(u8 cmd_byte, void *buffer, bool preprocess)
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{
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// TODO(Omega): Maybe dump FIFO to file on this error
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std::string temp = StringFromFormat(
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"GFX FIFO: Unknown Opcode (0x%x @ %p).\n"
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"This means one of the following:\n"
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"* The emulated GPU got desynced, disabling dual core can help\n"
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"* Command stream corrupted by some spurious memory bug\n"
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"* This really is an unknown opcode (unlikely)\n"
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"* Some other sort of bug\n\n"
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"Dolphin will now likely crash or hang. Enjoy." ,
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cmd_byte,
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buffer);
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Host_SysMessage(temp.c_str());
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INFO_LOG(VIDEO, "%s", temp.c_str());
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{
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SCPFifoStruct &fifo = CommandProcessor::fifo;
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std::string tmp = StringFromFormat(
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"Illegal command %02x\n"
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"CPBase: 0x%08x\n"
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"CPEnd: 0x%08x\n"
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"CPHiWatermark: 0x%08x\n"
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"CPLoWatermark: 0x%08x\n"
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"CPReadWriteDistance: 0x%08x\n"
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"CPWritePointer: 0x%08x\n"
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"CPReadPointer: 0x%08x\n"
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"CPBreakpoint: 0x%08x\n"
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"bFF_GPReadEnable: %s\n"
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"bFF_BPEnable: %s\n"
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"bFF_BPInt: %s\n"
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"bFF_Breakpoint: %s\n"
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,cmd_byte, fifo.CPBase, fifo.CPEnd, fifo.CPHiWatermark, fifo.CPLoWatermark, fifo.CPReadWriteDistance
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,fifo.CPWritePointer, fifo.CPReadPointer, fifo.CPBreakpoint, fifo.bFF_GPReadEnable ? "true" : "false"
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,fifo.bFF_BPEnable ? "true" : "false" ,fifo.bFF_BPInt ? "true" : "false"
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,fifo.bFF_Breakpoint ? "true" : "false");
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Host_SysMessage(tmp.c_str());
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INFO_LOG(VIDEO, "%s", tmp.c_str());
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}
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}
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static u32 Decode(u8* end)
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{
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u8 *opcodeStart = g_pVideoData;
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if (g_pVideoData == end)
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return 0;
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u8 cmd_byte = DataReadU8();
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u32 cycles;
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switch (cmd_byte)
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{
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case GX_NOP:
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cycles = 6; // Hm, this means that we scan over nop streams pretty slowly...
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break;
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case GX_LOAD_CP_REG: //0x08
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{
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if (end - g_pVideoData < 1 + 4)
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return 0;
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cycles = 12;
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u8 sub_cmd = DataReadU8();
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u32 value = DataReadU32();
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LoadCPReg(sub_cmd, value);
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INCSTAT(stats.thisFrame.numCPLoads);
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}
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break;
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case GX_LOAD_XF_REG:
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{
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if (end - g_pVideoData < 4)
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return 0;
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u32 Cmd2 = DataReadU32();
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int transfer_size = ((Cmd2 >> 16) & 15) + 1;
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if ((size_t) (end - g_pVideoData) < transfer_size * sizeof(u32))
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return 0;
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cycles = 18 + 6 * transfer_size;
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u32 xf_address = Cmd2 & 0xFFFF;
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LoadXFReg(transfer_size, xf_address);
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INCSTAT(stats.thisFrame.numXFLoads);
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}
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break;
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case GX_LOAD_INDX_A: //used for position matrices
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if (end - g_pVideoData < 4)
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return 0;
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cycles = 6;
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LoadIndexedXF(DataReadU32(), 0xC);
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break;
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case GX_LOAD_INDX_B: //used for normal matrices
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if (end - g_pVideoData < 4)
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return 0;
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cycles = 6;
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LoadIndexedXF(DataReadU32(), 0xD);
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break;
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case GX_LOAD_INDX_C: //used for postmatrices
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if (end - g_pVideoData < 4)
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return 0;
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cycles = 6;
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LoadIndexedXF(DataReadU32(), 0xE);
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break;
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case GX_LOAD_INDX_D: //used for lights
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if (end - g_pVideoData < 4)
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return 0;
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cycles = 6;
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LoadIndexedXF(DataReadU32(), 0xF);
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break;
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case GX_CMD_CALL_DL:
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{
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if (end - g_pVideoData < 8)
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return 0;
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u32 address = DataReadU32();
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u32 count = DataReadU32();
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cycles = 6 + InterpretDisplayList(address, count);
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}
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break;
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case GX_CMD_UNKNOWN_METRICS: // zelda 4 swords calls it and checks the metrics registers after that
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cycles = 6;
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DEBUG_LOG(VIDEO, "GX 0x44: %08x", cmd_byte);
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break;
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case GX_CMD_INVL_VC: // Invalidate Vertex Cache
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cycles = 6;
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DEBUG_LOG(VIDEO, "Invalidate (vertex cache?)");
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break;
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case GX_LOAD_BP_REG: //0x61
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// In skipped_frame case: We have to let BP writes through because they set
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// tokens and stuff. TODO: Call a much simplified LoadBPReg instead.
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{
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if (end - g_pVideoData < 4)
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return 0;
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cycles = 12;
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u32 bp_cmd = DataReadU32();
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LoadBPReg(bp_cmd);
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INCSTAT(stats.thisFrame.numBPLoads);
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}
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break;
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// draw primitives
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default:
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if ((cmd_byte & 0xC0) == 0x80)
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{
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cycles = 1600;
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// load vertices
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if (end - g_pVideoData < 2)
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return 0;
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u16 numVertices = DataReadU16();
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if (!VertexLoaderManager::RunVertices(
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cmd_byte & GX_VAT_MASK, // Vertex loader index (0 - 7)
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(cmd_byte & GX_PRIMITIVE_MASK) >> GX_PRIMITIVE_SHIFT,
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numVertices,
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end - g_pVideoData,
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g_bSkipCurrentFrame))
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{
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return 0;
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}
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}
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else
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{
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UnknownOpcode(cmd_byte, opcodeStart, false);
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cycles = 1;
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}
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break;
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}
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// Display lists get added directly into the FIFO stream
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if (g_bRecordFifoData && cmd_byte != GX_CMD_CALL_DL)
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FifoRecorder::GetInstance().WriteGPCommand(opcodeStart, u32(g_pVideoData - opcodeStart));
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return cycles;
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}
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void OpcodeDecoder_Init()
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{
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g_pVideoData = GetVideoBufferStartPtr();
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}
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void OpcodeDecoder_Shutdown()
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{
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}
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u32 OpcodeDecoder_Run(u8* end)
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{
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u32 totalCycles = 0;
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while (true)
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{
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u8* old = g_pVideoData;
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u32 cycles = Decode(end);
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if (cycles == 0)
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{
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g_pVideoData = old;
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break;
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}
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totalCycles += cycles;
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}
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return totalCycles;
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}
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