mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2025-06-13 00:58:29 +02:00
VideoCommon: cleanup OpcodeDecoder
This commit is contained in:
degasus
@ -34,12 +34,8 @@
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bool g_bRecordFifoData = false;
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u8* g_video_buffer_read_ptr;
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static u8* s_video_buffer_pp_read_ptr;
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static u32 InterpretDisplayList(u32 address, u32 size)
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{
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u8* old_pVideoData = g_video_buffer_read_ptr;
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u8* startAddress;
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if (g_use_deterministic_gpu_thread)
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@ -55,32 +51,26 @@ static u32 InterpretDisplayList(u32 address, u32 size)
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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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OpcodeDecoder_Run(startAddress, startAddress + size, &cycles, true);
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OpcodeDecoder_Run(DataReader(startAddress, startAddress + size), &cycles, true);
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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_video_buffer_read_ptr = old_pVideoData;
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return cycles;
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}
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static void InterpretDisplayListPreprocess(u32 address, u32 size)
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{
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u8* old_read_ptr = s_video_buffer_pp_read_ptr;
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u8* startAddress = Memory::GetPointer(address);
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PushFifoAuxBuffer(startAddress, size);
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if (startAddress != nullptr)
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{
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OpcodeDecoder_Preprocess(startAddress, startAddress + size, true);
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OpcodeDecoder_Run<true>(DataReader(startAddress, startAddress + size), nullptr, true);
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}
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s_video_buffer_pp_read_ptr = old_read_ptr;
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}
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static void UnknownOpcode(u8 cmd_byte, void *buffer, bool preprocess)
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@ -131,180 +121,8 @@ static void UnknownOpcode(u8 cmd_byte, void *buffer, bool preprocess)
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}
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}
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template <bool is_preprocess, u8** bufp>
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static u32 Decode(u8* end, bool in_display_list)
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{
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u8 *opcodeStart = *bufp;
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if (*bufp == end)
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return 0;
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u8 cmd_byte = DataRead<u8>(bufp);
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u32 cycles;
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int refarray;
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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 - *bufp < 1 + 4)
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return 0;
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cycles = 12;
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u8 sub_cmd = DataRead<u8>(bufp);
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u32 value = DataRead<u32>(bufp);
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LoadCPReg(sub_cmd, value, is_preprocess);
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if (!is_preprocess)
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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 - *bufp < 4)
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return 0;
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u32 Cmd2 = DataRead<u32>(bufp);
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int transfer_size = ((Cmd2 >> 16) & 15) + 1;
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if ((size_t) (end - *bufp) < transfer_size * sizeof(u32))
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return 0;
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cycles = 18 + 6 * transfer_size;
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if (!is_preprocess)
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{
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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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else
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{
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*bufp += transfer_size * sizeof(u32);
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}
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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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refarray = 0xC;
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goto load_indx;
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case GX_LOAD_INDX_B: //used for normal matrices
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refarray = 0xD;
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goto load_indx;
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case GX_LOAD_INDX_C: //used for postmatrices
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refarray = 0xE;
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goto load_indx;
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case GX_LOAD_INDX_D: //used for lights
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refarray = 0xF;
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goto load_indx;
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load_indx:
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if (end - *bufp < 4)
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return 0;
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cycles = 6;
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if (is_preprocess)
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PreprocessIndexedXF(DataRead<u32>(bufp), refarray);
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else
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LoadIndexedXF(DataRead<u32>(bufp), refarray);
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break;
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case GX_CMD_CALL_DL:
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{
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if (end - *bufp < 8)
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return 0;
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u32 address = DataRead<u32>(bufp);
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u32 count = DataRead<u32>(bufp);
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if (in_display_list)
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{
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cycles = 6;
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WARN_LOG(VIDEO,"recursive display list detected");
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}
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else
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{
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if (is_preprocess)
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InterpretDisplayListPreprocess(address, count);
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else
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cycles = 6 + InterpretDisplayList(address, count);
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}
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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 - *bufp < 4)
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return 0;
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cycles = 12;
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u32 bp_cmd = DataRead<u32>(bufp);
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if (is_preprocess)
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{
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LoadBPRegPreprocess(bp_cmd);
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}
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else
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{
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LoadBPReg(bp_cmd);
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INCSTAT(stats.thisFrame.numBPLoads);
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}
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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 - *bufp < 2)
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return 0;
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u16 num_vertices = DataRead<u16>(bufp);
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if (is_preprocess)
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{
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size_t size = num_vertices * VertexLoaderManager::GetVertexSize(cmd_byte & GX_VAT_MASK, is_preprocess);
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if ((size_t) (end - *bufp) < size)
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return 0;
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*bufp += size;
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}
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else
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{
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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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num_vertices,
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end - *bufp,
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g_bSkipCurrentFrame))
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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, is_preprocess);
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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 (!is_preprocess && g_bRecordFifoData && cmd_byte != GX_CMD_CALL_DL)
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FifoRecorder::GetInstance().WriteGPCommand(opcodeStart, u32(*bufp - opcodeStart));
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// In is_preprocess mode, we don't actually care about cycles, at least for
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// now... make sure the compiler realizes that.
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return is_preprocess ? 1 : cycles;
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}
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void OpcodeDecoder_Init()
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{
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g_video_buffer_read_ptr = GetVideoBufferStartPtr();
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}
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@ -312,40 +130,185 @@ void OpcodeDecoder_Shutdown()
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{
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}
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u8* OpcodeDecoder_Run(u8* start, u8* end, u32* cycles, bool in_display_list)
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template <bool is_preprocess>
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u8* OpcodeDecoder_Run(DataReader src, u32* cycles, bool in_display_list)
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{
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g_video_buffer_read_ptr = start;
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u32 totalCycles = 0;
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u8* opcodeStart;
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while (true)
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{
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u8* old = g_video_buffer_read_ptr;
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u32 cycles_op = Decode</*is_preprocess*/ false, &g_video_buffer_read_ptr>(end, in_display_list);
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if (cycles_op == 0)
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src.WritePointer(&opcodeStart);
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if (!src.size())
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goto end;
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u8 cmd_byte = src.Read<u8>();
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int refarray;
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switch (cmd_byte)
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{
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g_video_buffer_read_ptr = old;
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case GX_NOP:
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totalCycles += 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 (src.size() < 1 + 4)
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goto end;
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totalCycles += 12;
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u8 sub_cmd = src.Read<u8>();
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u32 value = src.Read<u32>();
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LoadCPReg(sub_cmd, value, is_preprocess);
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if (!is_preprocess)
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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 (src.size() < 4)
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goto end;
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u32 Cmd2 = src.Read<u32>();
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int transfer_size = ((Cmd2 >> 16) & 15) + 1;
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if (src.size() < transfer_size * sizeof(u32))
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goto end;
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totalCycles += 18 + 6 * transfer_size;
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if (!is_preprocess)
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{
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u32 xf_address = Cmd2 & 0xFFFF;
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LoadXFReg(transfer_size, xf_address, src);
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INCSTAT(stats.thisFrame.numXFLoads);
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}
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src.Skip<u32>(transfer_size);
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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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refarray = 0xC;
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goto load_indx;
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case GX_LOAD_INDX_B: //used for normal matrices
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refarray = 0xD;
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goto load_indx;
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case GX_LOAD_INDX_C: //used for postmatrices
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refarray = 0xE;
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goto load_indx;
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case GX_LOAD_INDX_D: //used for lights
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refarray = 0xF;
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goto load_indx;
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load_indx:
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if (src.size() < 4)
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goto end;
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totalCycles += 6;
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if (is_preprocess)
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PreprocessIndexedXF(src.Read<u32>(), refarray);
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else
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LoadIndexedXF(src.Read<u32>(), refarray);
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break;
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case GX_CMD_CALL_DL:
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{
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if (src.size() < 8)
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goto end;
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u32 address = src.Read<u32>();
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u32 count = src.Read<u32>();
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if (in_display_list)
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{
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totalCycles += 6;
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WARN_LOG(VIDEO,"recursive display list detected");
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}
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else
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{
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if (is_preprocess)
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InterpretDisplayListPreprocess(address, count);
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else
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totalCycles += 6 + InterpretDisplayList(address, count);
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}
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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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totalCycles += 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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totalCycles += 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 (src.size() < 4)
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goto end;
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totalCycles += 12;
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u32 bp_cmd = src.Read<u32>();
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if (is_preprocess)
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{
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LoadBPRegPreprocess(bp_cmd);
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}
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else
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{
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LoadBPReg(bp_cmd);
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INCSTAT(stats.thisFrame.numBPLoads);
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}
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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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// load vertices
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if (src.size() < 2)
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goto end;
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u16 num_vertices = src.Read<u16>();
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if (is_preprocess)
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{
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size_t size = num_vertices * VertexLoaderManager::GetVertexSize(cmd_byte & GX_VAT_MASK, is_preprocess);
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if (src.size() < size)
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goto end;
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src.Skip(size);
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}
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else
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{
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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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num_vertices,
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src,
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g_bSkipCurrentFrame))
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goto end;
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}
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totalCycles += 1600;
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}
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else
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{
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UnknownOpcode(cmd_byte, opcodeStart, is_preprocess);
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totalCycles += 1;
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}
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break;
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}
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totalCycles += cycles_op;
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// Display lists get added directly into the FIFO stream
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if (!is_preprocess && g_bRecordFifoData && cmd_byte != GX_CMD_CALL_DL)
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{
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u8* opcodeEnd;
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src.WritePointer(&opcodeEnd);
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FifoRecorder::GetInstance().WriteGPCommand(opcodeStart, u32(opcodeEnd - opcodeStart));
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}
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}
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end:
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if (cycles)
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{
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*cycles = totalCycles;
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}
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return g_video_buffer_read_ptr;
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return opcodeStart;
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}
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u8* OpcodeDecoder_Preprocess(u8* start, u8 *end, bool in_display_list)
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{
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s_video_buffer_pp_read_ptr = start;
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while (true)
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{
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u8* old = s_video_buffer_pp_read_ptr;
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u32 cycles = Decode</*is_preprocess*/ true, &s_video_buffer_pp_read_ptr>(end, in_display_list);
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if (cycles == 0)
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{
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s_video_buffer_pp_read_ptr = old;
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break;
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}
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}
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return s_video_buffer_pp_read_ptr;
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}
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template u8* OpcodeDecoder_Run<true>(DataReader src, u32* cycles, bool in_display_list);
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template u8* OpcodeDecoder_Run<false>(DataReader src, u32* cycles, bool in_display_list);
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