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));
}
}
u8* OpcodeDecoder_Run(DataReader& reader, u32* cycles)
{
u32 totalCycles = 0;
u8* opcodeStart;
while (true)
{
opcodeStart = reader.GetReadPosition();
if (!reader.size())
goto end;
u8 cmd_byte = reader.Read<u8>();
size_t distance = reader.size();
switch (cmd_byte)
{
case GX_NOP:
{
totalCycles += GX_NOP_CYCLES; // Hm, this means that we scan over nop streams pretty slowly...
}
break;
case GX_UNKNOWN_RESET:
{
totalCycles += GX_NOP_CYCLES; // Datel software uses this command
DEBUG_LOG(VIDEO, "GX Reset?: %08x", cmd_byte);
}
break;
case GX_LOAD_CP_REG:
{
if (sizeCheck && distance < GX_LOAD_CP_REG_SIZE)
goto end;
totalCycles += GX_LOAD_CP_REG_CYCLES;
u8 sub_cmd = reader.Read<u8>();
u32 value = reader.Read<u32>();
LoadCPReg<is_preprocess>(sub_cmd, value);
if (!is_preprocess)
INCSTAT(stats.thisFrame.numCPLoads);
}
break;
case GX_LOAD_XF_REG:
{
if (sizeCheck && distance < GX_LOAD_XF_REG_SIZE)
goto end;
u32 Cmd2 = reader.Read<u32>();
distance -= GX_LOAD_XF_REG_SIZE;
int transfer_size = ((Cmd2 >> 16) & 15) + 1;
if (sizeCheck && distance < (transfer_size * sizeof(u32)))
goto end;
totalCycles += GX_LOAD_XF_REG_BASE_CYCLES + GX_LOAD_XF_REG_TRANSFER_CYCLES * transfer_size;
if (is_preprocess)
{
reader.ReadSkip(transfer_size * sizeof(u32));
}
else
{
u32 xf_address = Cmd2 & 0xFFFF;
LoadXFReg(transfer_size, xf_address);
INCSTAT(stats.thisFrame.numXFLoads);
}
}
break;
case GX_LOAD_INDX_A: //used for position matrices
case GX_LOAD_INDX_B: //used for normal matrices
case GX_LOAD_INDX_C: //used for postmatrices
case GX_LOAD_INDX_D: //used for lights
{
if (sizeCheck && distance < GX_LOAD_INDX_SIZE)
goto end;
totalCycles += GX_LOAD_INDX_CYCLES;
const s32 ref_array = (cmd_byte >> 3) + 8;
if (is_preprocess)
PreprocessIndexedXF(reader.Read<u32>(), ref_array);
else
LoadIndexedXF(reader.Read<u32>(), ref_array);
}
break;
case GX_CMD_CALL_DL:
{
if (sizeCheck && distance < GX_CMD_CALL_DL_SIZE)
goto end;
u32 address = reader.Read<u32>();
u32 count = reader.Read<u32>();
if (is_preprocess)
InterpretDisplayListPreprocess(address, count);
else
totalCycles += GX_CMD_CALL_DL_BASE_CYCLES + InterpretDisplayList(address, count);
}
break;
case GX_CMD_UNKNOWN_METRICS: // zelda 4 swords calls it and checks the metrics registers after that
{
totalCycles += GX_CMD_UNKNOWN_METRICS_CYCLES;
DEBUG_LOG(VIDEO, "GX 0x44: %08x", cmd_byte);
}
break;
case GX_CMD_INVL_VC: // Invalidate Vertex Cache
{
totalCycles += GX_CMD_INVL_VC_CYCLES;
DEBUG_LOG(VIDEO, "Invalidate (vertex cache?)");
}
break;
case GX_LOAD_BP_REG:
{
if (sizeCheck && distance < GX_LOAD_BP_REG_SIZE)
goto end;
totalCycles += GX_LOAD_BP_REG_CYCLES;
u32 bp_cmd = reader.Read<u32>();
if (is_preprocess)
{
LoadBPRegPreprocess(bp_cmd);
}
else
{
LoadBPReg(bp_cmd);
INCSTAT(stats.thisFrame.numBPLoads);
}
}
break;
// draw primitives
default:
if ((cmd_byte & GX_DRAW_PRIMITIVES) == 0x80)
{
// load vertices
if (sizeCheck && distance < GX_DRAW_PRIMITIVES_SIZE)
goto end;
u32 count = reader.Read<u16>();
distance -= GX_DRAW_PRIMITIVES_SIZE;
if (count)
{
CPState& state = is_preprocess ? g_preprocess_cp_state : g_main_cp_state;
VertexLoaderParameters parameters;
parameters.count = count;
parameters.buf_size = distance;
parameters.primitive = (cmd_byte & GX_PRIMITIVE_MASK) >> GX_PRIMITIVE_SHIFT;
u32 vtx_attr_group = cmd_byte & GX_VAT_MASK;
parameters.vtx_attr_group = vtx_attr_group;
parameters.needloaderrefresh = (state.attr_dirty & (1u << vtx_attr_group)) != 0;
parameters.skip_draw = g_bSkipCurrentFrame;
parameters.VtxDesc = &state.vtx_desc;
parameters.VtxAttr = &state.vtx_attr[vtx_attr_group];
parameters.source = reader.GetReadPosition();
state.attr_dirty &= ~(1 << vtx_attr_group);
u32 readsize = 0;
if (is_preprocess)
{
u32 components = 0;
VertexLoaderManager::GetVertexSizeAndComponents(parameters, readsize, components);
readsize *= count;
if (distance >= readsize)
{
totalCycles += GX_NOP_CYCLES + GX_DRAW_PRIMITIVES_CYCLES * parameters.count;
reader.ReadSkip(readsize);
}
else
{
goto end;
}
}
else
{
u32 writesize = 0;
if (VertexLoaderManager::ConvertVertices(parameters, readsize, writesize))
{
totalCycles += GX_NOP_CYCLES + GX_DRAW_PRIMITIVES_CYCLES * parameters.count;
reader.ReadSkip(readsize);
VertexManagerBase::s_pCurBufferPointer += writesize;
}
else
{
goto end;
}
}
}
else
{
totalCycles += GX_NOP_CYCLES;
}
}
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;
}
