diff options
Diffstat (limited to 'src/video_core/vertex_shader.cpp')
-rw-r--r-- | src/video_core/vertex_shader.cpp | 629 |
1 files changed, 0 insertions, 629 deletions
diff --git a/src/video_core/vertex_shader.cpp b/src/video_core/vertex_shader.cpp deleted file mode 100644 index 5f66f3455..000000000 --- a/src/video_core/vertex_shader.cpp +++ /dev/null @@ -1,629 +0,0 @@ -// Copyright 2014 Citra Emulator Project -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. - -#include <boost/container/static_vector.hpp> -#include <boost/range/algorithm.hpp> - -#include <common/file_util.h> - -#include <nihstro/shader_bytecode.h> - -#include "common/profiler.h" - -#include "pica.h" -#include "vertex_shader.h" -#include "debug_utils/debug_utils.h" - -using nihstro::OpCode; -using nihstro::Instruction; -using nihstro::RegisterType; -using nihstro::SourceRegister; -using nihstro::SwizzlePattern; - -namespace Pica { - -namespace VertexShader { - -struct VertexShaderState { - u32 program_counter; - - const float24* input_register_table[16]; - Math::Vec4<float24> output_registers[16]; - - Math::Vec4<float24> temporary_registers[16]; - bool conditional_code[2]; - - // Two Address registers and one loop counter - // TODO: How many bits do these actually have? - s32 address_registers[3]; - - enum { - INVALID_ADDRESS = 0xFFFFFFFF - }; - - struct CallStackElement { - u32 final_address; // Address upon which we jump to return_address - u32 return_address; // Where to jump when leaving scope - u8 repeat_counter; // How often to repeat until this call stack element is removed - u8 loop_increment; // Which value to add to the loop counter after an iteration - // TODO: Should this be a signed value? Does it even matter? - u32 loop_address; // The address where we'll return to after each loop iteration - }; - - // TODO: Is there a maximal size for this? - boost::container::static_vector<CallStackElement, 16> call_stack; - - struct { - u32 max_offset; // maximum program counter ever reached - u32 max_opdesc_id; // maximum swizzle pattern index ever used - } debug; -}; - -static void ProcessShaderCode(VertexShaderState& state) { - const auto& uniforms = g_state.vs.uniforms; - const auto& swizzle_data = g_state.vs.swizzle_data; - const auto& program_code = g_state.vs.program_code; - - // Placeholder for invalid inputs - static float24 dummy_vec4_float24[4]; - - while (true) { - if (!state.call_stack.empty()) { - auto& top = state.call_stack.back(); - if (state.program_counter == top.final_address) { - state.address_registers[2] += top.loop_increment; - - if (top.repeat_counter-- == 0) { - state.program_counter = top.return_address; - state.call_stack.pop_back(); - } else { - state.program_counter = top.loop_address; - } - - // TODO: Is "trying again" accurate to hardware? - continue; - } - } - - bool exit_loop = false; - const Instruction instr = { program_code[state.program_counter] }; - const SwizzlePattern swizzle = { swizzle_data[instr.common.operand_desc_id] }; - - static auto call = [](VertexShaderState& state, u32 offset, u32 num_instructions, - u32 return_offset, u8 repeat_count, u8 loop_increment) { - state.program_counter = offset - 1; // -1 to make sure when incrementing the PC we end up at the correct offset - ASSERT(state.call_stack.size() < state.call_stack.capacity()); - state.call_stack.push_back({ offset + num_instructions, return_offset, repeat_count, loop_increment, offset }); - }; - state.debug.max_offset = std::max<u32>(state.debug.max_offset, 1 + state.program_counter); - - auto LookupSourceRegister = [&](const SourceRegister& source_reg) -> const float24* { - switch (source_reg.GetRegisterType()) { - case RegisterType::Input: - return state.input_register_table[source_reg.GetIndex()]; - - case RegisterType::Temporary: - return &state.temporary_registers[source_reg.GetIndex()].x; - - case RegisterType::FloatUniform: - return &uniforms.f[source_reg.GetIndex()].x; - - default: - return dummy_vec4_float24; - } - }; - - switch (instr.opcode.Value().GetInfo().type) { - case OpCode::Type::Arithmetic: - { - const bool is_inverted = (0 != (instr.opcode.Value().GetInfo().subtype & OpCode::Info::SrcInversed)); - - const int address_offset = (instr.common.address_register_index == 0) - ? 0 : state.address_registers[instr.common.address_register_index - 1]; - - const float24* src1_ = LookupSourceRegister(instr.common.GetSrc1(is_inverted) + (!is_inverted * address_offset)); - const float24* src2_ = LookupSourceRegister(instr.common.GetSrc2(is_inverted) + ( is_inverted * address_offset)); - - const bool negate_src1 = ((bool)swizzle.negate_src1 != false); - const bool negate_src2 = ((bool)swizzle.negate_src2 != false); - - float24 src1[4] = { - src1_[(int)swizzle.GetSelectorSrc1(0)], - src1_[(int)swizzle.GetSelectorSrc1(1)], - src1_[(int)swizzle.GetSelectorSrc1(2)], - src1_[(int)swizzle.GetSelectorSrc1(3)], - }; - if (negate_src1) { - src1[0] = src1[0] * float24::FromFloat32(-1); - src1[1] = src1[1] * float24::FromFloat32(-1); - src1[2] = src1[2] * float24::FromFloat32(-1); - src1[3] = src1[3] * float24::FromFloat32(-1); - } - float24 src2[4] = { - src2_[(int)swizzle.GetSelectorSrc2(0)], - src2_[(int)swizzle.GetSelectorSrc2(1)], - src2_[(int)swizzle.GetSelectorSrc2(2)], - src2_[(int)swizzle.GetSelectorSrc2(3)], - }; - if (negate_src2) { - src2[0] = src2[0] * float24::FromFloat32(-1); - src2[1] = src2[1] * float24::FromFloat32(-1); - src2[2] = src2[2] * float24::FromFloat32(-1); - src2[3] = src2[3] * float24::FromFloat32(-1); - } - - float24* dest = (instr.common.dest.Value() < 0x10) ? &state.output_registers[instr.common.dest.Value().GetIndex()][0] - : (instr.common.dest.Value() < 0x20) ? &state.temporary_registers[instr.common.dest.Value().GetIndex()][0] - : dummy_vec4_float24; - - state.debug.max_opdesc_id = std::max<u32>(state.debug.max_opdesc_id, 1+instr.common.operand_desc_id); - - switch (instr.opcode.Value().EffectiveOpCode()) { - case OpCode::Id::ADD: - { - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - dest[i] = src1[i] + src2[i]; - } - - break; - } - - case OpCode::Id::MUL: - { - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - dest[i] = src1[i] * src2[i]; - } - - break; - } - - case OpCode::Id::FLR: - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - dest[i] = float24::FromFloat32(std::floor(src1[i].ToFloat32())); - } - break; - - case OpCode::Id::MAX: - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - dest[i] = std::max(src1[i], src2[i]); - } - break; - - case OpCode::Id::MIN: - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - dest[i] = std::min(src1[i], src2[i]); - } - break; - - case OpCode::Id::DP3: - case OpCode::Id::DP4: - { - float24 dot = float24::FromFloat32(0.f); - int num_components = (instr.opcode.Value() == OpCode::Id::DP3) ? 3 : 4; - for (int i = 0; i < num_components; ++i) - dot = dot + src1[i] * src2[i]; - - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - dest[i] = dot; - } - break; - } - - // Reciprocal - case OpCode::Id::RCP: - { - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - // TODO: Be stable against division by zero! - // TODO: I think this might be wrong... we should only use one component here - dest[i] = float24::FromFloat32(1.0f / src1[i].ToFloat32()); - } - - break; - } - - // Reciprocal Square Root - case OpCode::Id::RSQ: - { - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - // TODO: Be stable against division by zero! - // TODO: I think this might be wrong... we should only use one component here - dest[i] = float24::FromFloat32(1.0f / sqrt(src1[i].ToFloat32())); - } - - break; - } - - case OpCode::Id::MOVA: - { - for (int i = 0; i < 2; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - // TODO: Figure out how the rounding is done on hardware - state.address_registers[i] = static_cast<s32>(src1[i].ToFloat32()); - } - - break; - } - - case OpCode::Id::MOV: - { - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - dest[i] = src1[i]; - } - break; - } - - case OpCode::Id::SLT: - case OpCode::Id::SLTI: - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - dest[i] = (src1[i] < src2[i]) ? float24::FromFloat32(1.0f) : float24::FromFloat32(0.0f); - } - break; - - case OpCode::Id::CMP: - for (int i = 0; i < 2; ++i) { - // TODO: Can you restrict to one compare via dest masking? - - auto compare_op = instr.common.compare_op; - auto op = (i == 0) ? compare_op.x.Value() : compare_op.y.Value(); - - switch (op) { - case compare_op.Equal: - state.conditional_code[i] = (src1[i] == src2[i]); - break; - - case compare_op.NotEqual: - state.conditional_code[i] = (src1[i] != src2[i]); - break; - - case compare_op.LessThan: - state.conditional_code[i] = (src1[i] < src2[i]); - break; - - case compare_op.LessEqual: - state.conditional_code[i] = (src1[i] <= src2[i]); - break; - - case compare_op.GreaterThan: - state.conditional_code[i] = (src1[i] > src2[i]); - break; - - case compare_op.GreaterEqual: - state.conditional_code[i] = (src1[i] >= src2[i]); - break; - - default: - LOG_ERROR(HW_GPU, "Unknown compare mode %x", static_cast<int>(op)); - break; - } - } - break; - - default: - LOG_ERROR(HW_GPU, "Unhandled arithmetic instruction: 0x%02x (%s): 0x%08x", - (int)instr.opcode.Value().EffectiveOpCode(), instr.opcode.Value().GetInfo().name, instr.hex); - DEBUG_ASSERT(false); - break; - } - - break; - } - - case OpCode::Type::MultiplyAdd: - { - if ((instr.opcode.Value().EffectiveOpCode() == OpCode::Id::MAD) || - (instr.opcode.Value().EffectiveOpCode() == OpCode::Id::MADI)) { - const SwizzlePattern& swizzle = *(SwizzlePattern*)&swizzle_data[instr.mad.operand_desc_id]; - - bool is_inverted = (instr.opcode.Value().EffectiveOpCode() == OpCode::Id::MADI); - - const float24* src1_ = LookupSourceRegister(instr.mad.GetSrc1(is_inverted)); - const float24* src2_ = LookupSourceRegister(instr.mad.GetSrc2(is_inverted)); - const float24* src3_ = LookupSourceRegister(instr.mad.GetSrc3(is_inverted)); - - const bool negate_src1 = ((bool)swizzle.negate_src1 != false); - const bool negate_src2 = ((bool)swizzle.negate_src2 != false); - const bool negate_src3 = ((bool)swizzle.negate_src3 != false); - - float24 src1[4] = { - src1_[(int)swizzle.GetSelectorSrc1(0)], - src1_[(int)swizzle.GetSelectorSrc1(1)], - src1_[(int)swizzle.GetSelectorSrc1(2)], - src1_[(int)swizzle.GetSelectorSrc1(3)], - }; - if (negate_src1) { - src1[0] = src1[0] * float24::FromFloat32(-1); - src1[1] = src1[1] * float24::FromFloat32(-1); - src1[2] = src1[2] * float24::FromFloat32(-1); - src1[3] = src1[3] * float24::FromFloat32(-1); - } - float24 src2[4] = { - src2_[(int)swizzle.GetSelectorSrc2(0)], - src2_[(int)swizzle.GetSelectorSrc2(1)], - src2_[(int)swizzle.GetSelectorSrc2(2)], - src2_[(int)swizzle.GetSelectorSrc2(3)], - }; - if (negate_src2) { - src2[0] = src2[0] * float24::FromFloat32(-1); - src2[1] = src2[1] * float24::FromFloat32(-1); - src2[2] = src2[2] * float24::FromFloat32(-1); - src2[3] = src2[3] * float24::FromFloat32(-1); - } - float24 src3[4] = { - src3_[(int)swizzle.GetSelectorSrc3(0)], - src3_[(int)swizzle.GetSelectorSrc3(1)], - src3_[(int)swizzle.GetSelectorSrc3(2)], - src3_[(int)swizzle.GetSelectorSrc3(3)], - }; - if (negate_src3) { - src3[0] = src3[0] * float24::FromFloat32(-1); - src3[1] = src3[1] * float24::FromFloat32(-1); - src3[2] = src3[2] * float24::FromFloat32(-1); - src3[3] = src3[3] * float24::FromFloat32(-1); - } - - float24* dest = (instr.mad.dest.Value() < 0x10) ? &state.output_registers[instr.mad.dest.Value().GetIndex()][0] - : (instr.mad.dest.Value() < 0x20) ? &state.temporary_registers[instr.mad.dest.Value().GetIndex()][0] - : dummy_vec4_float24; - - for (int i = 0; i < 4; ++i) { - if (!swizzle.DestComponentEnabled(i)) - continue; - - dest[i] = src1[i] * src2[i] + src3[i]; - } - } else { - LOG_ERROR(HW_GPU, "Unhandled multiply-add instruction: 0x%02x (%s): 0x%08x", - (int)instr.opcode.Value().EffectiveOpCode(), instr.opcode.Value().GetInfo().name, instr.hex); - } - break; - } - - default: - { - static auto evaluate_condition = [](const VertexShaderState& state, bool refx, bool refy, Instruction::FlowControlType flow_control) { - bool results[2] = { refx == state.conditional_code[0], - refy == state.conditional_code[1] }; - - switch (flow_control.op) { - case flow_control.Or: - return results[0] || results[1]; - - case flow_control.And: - return results[0] && results[1]; - - case flow_control.JustX: - return results[0]; - - case flow_control.JustY: - return results[1]; - } - }; - - // Handle each instruction on its own - switch (instr.opcode.Value()) { - case OpCode::Id::END: - exit_loop = true; - break; - - case OpCode::Id::JMPC: - if (evaluate_condition(state, instr.flow_control.refx, instr.flow_control.refy, instr.flow_control)) { - state.program_counter = instr.flow_control.dest_offset - 1; - } - break; - - case OpCode::Id::JMPU: - if (uniforms.b[instr.flow_control.bool_uniform_id]) { - state.program_counter = instr.flow_control.dest_offset - 1; - } - break; - - case OpCode::Id::CALL: - call(state, - instr.flow_control.dest_offset, - instr.flow_control.num_instructions, - state.program_counter + 1, 0, 0); - break; - - case OpCode::Id::CALLU: - if (uniforms.b[instr.flow_control.bool_uniform_id]) { - call(state, - instr.flow_control.dest_offset, - instr.flow_control.num_instructions, - state.program_counter + 1, 0, 0); - } - break; - - case OpCode::Id::CALLC: - if (evaluate_condition(state, instr.flow_control.refx, instr.flow_control.refy, instr.flow_control)) { - call(state, - instr.flow_control.dest_offset, - instr.flow_control.num_instructions, - state.program_counter + 1, 0, 0); - } - break; - - case OpCode::Id::NOP: - break; - - case OpCode::Id::IFU: - if (uniforms.b[instr.flow_control.bool_uniform_id]) { - call(state, - state.program_counter + 1, - instr.flow_control.dest_offset - state.program_counter - 1, - instr.flow_control.dest_offset + instr.flow_control.num_instructions, 0, 0); - } else { - call(state, - instr.flow_control.dest_offset, - instr.flow_control.num_instructions, - instr.flow_control.dest_offset + instr.flow_control.num_instructions, 0, 0); - } - - break; - - case OpCode::Id::IFC: - { - // TODO: Do we need to consider swizzlers here? - - if (evaluate_condition(state, instr.flow_control.refx, instr.flow_control.refy, instr.flow_control)) { - call(state, - state.program_counter + 1, - instr.flow_control.dest_offset - state.program_counter - 1, - instr.flow_control.dest_offset + instr.flow_control.num_instructions, 0, 0); - } else { - call(state, - instr.flow_control.dest_offset, - instr.flow_control.num_instructions, - instr.flow_control.dest_offset + instr.flow_control.num_instructions, 0, 0); - } - - break; - } - - case OpCode::Id::LOOP: - { - state.address_registers[2] = uniforms.i[instr.flow_control.int_uniform_id].y; - - call(state, - state.program_counter + 1, - instr.flow_control.dest_offset - state.program_counter + 1, - instr.flow_control.dest_offset + 1, - uniforms.i[instr.flow_control.int_uniform_id].x, - uniforms.i[instr.flow_control.int_uniform_id].z); - break; - } - - default: - LOG_ERROR(HW_GPU, "Unhandled instruction: 0x%02x (%s): 0x%08x", - (int)instr.opcode.Value().EffectiveOpCode(), instr.opcode.Value().GetInfo().name, instr.hex); - break; - } - - break; - } - } - - ++state.program_counter; - - if (exit_loop) - break; - } -} - -static Common::Profiling::TimingCategory shader_category("Vertex Shader"); - -OutputVertex RunShader(const InputVertex& input, int num_attributes, const Regs::ShaderConfig& config, const State::ShaderSetup& setup) { - Common::Profiling::ScopeTimer timer(shader_category); - - VertexShaderState state; - - state.program_counter = config.main_offset; - state.debug.max_offset = 0; - state.debug.max_opdesc_id = 0; - - // Setup input register table - const auto& attribute_register_map = config.input_register_map; - float24 dummy_register; - boost::fill(state.input_register_table, &dummy_register); - - if (num_attributes > 0) state.input_register_table[attribute_register_map.attribute0_register] = &input.attr[0].x; - if (num_attributes > 1) state.input_register_table[attribute_register_map.attribute1_register] = &input.attr[1].x; - if (num_attributes > 2) state.input_register_table[attribute_register_map.attribute2_register] = &input.attr[2].x; - if (num_attributes > 3) state.input_register_table[attribute_register_map.attribute3_register] = &input.attr[3].x; - if (num_attributes > 4) state.input_register_table[attribute_register_map.attribute4_register] = &input.attr[4].x; - if (num_attributes > 5) state.input_register_table[attribute_register_map.attribute5_register] = &input.attr[5].x; - if (num_attributes > 6) state.input_register_table[attribute_register_map.attribute6_register] = &input.attr[6].x; - if (num_attributes > 7) state.input_register_table[attribute_register_map.attribute7_register] = &input.attr[7].x; - if (num_attributes > 8) state.input_register_table[attribute_register_map.attribute8_register] = &input.attr[8].x; - if (num_attributes > 9) state.input_register_table[attribute_register_map.attribute9_register] = &input.attr[9].x; - if (num_attributes > 10) state.input_register_table[attribute_register_map.attribute10_register] = &input.attr[10].x; - if (num_attributes > 11) state.input_register_table[attribute_register_map.attribute11_register] = &input.attr[11].x; - if (num_attributes > 12) state.input_register_table[attribute_register_map.attribute12_register] = &input.attr[12].x; - if (num_attributes > 13) state.input_register_table[attribute_register_map.attribute13_register] = &input.attr[13].x; - if (num_attributes > 14) state.input_register_table[attribute_register_map.attribute14_register] = &input.attr[14].x; - if (num_attributes > 15) state.input_register_table[attribute_register_map.attribute15_register] = &input.attr[15].x; - - state.conditional_code[0] = false; - state.conditional_code[1] = false; - - ProcessShaderCode(state); -#if PICA_DUMP_SHADERS - DebugUtils::DumpShader(setup.program_code.data(), state.debug.max_offset, setup.swizzle_data.data(), - state.debug.max_opdesc_id, config.main_offset, - g_state.regs.vs_output_attributes); // TODO: Don't hardcode VS here -#endif - - // Setup output data - OutputVertex ret; - // TODO(neobrain): Under some circumstances, up to 16 attributes may be output. We need to - // figure out what those circumstances are and enable the remaining outputs then. - for (int i = 0; i < 7; ++i) { - const auto& output_register_map = g_state.regs.vs_output_attributes[i]; // TODO: Don't hardcode VS here - - u32 semantics[4] = { - output_register_map.map_x, output_register_map.map_y, - output_register_map.map_z, output_register_map.map_w - }; - - for (int comp = 0; comp < 4; ++comp) { - float24* out = ((float24*)&ret) + semantics[comp]; - if (semantics[comp] != Regs::VSOutputAttributes::INVALID) { - *out = state.output_registers[i][comp]; - } else { - // Zero output so that attributes which aren't output won't have denormals in them, - // which would slow us down later. - memset(out, 0, sizeof(*out)); - } - } - } - - // The hardware takes the absolute and saturates vertex colors like this, *before* doing interpolation - for (int i = 0; i < 4; ++i) { - ret.color[i] = float24::FromFloat32( - std::fmin(std::fabs(ret.color[i].ToFloat32()), 1.0f)); - } - - LOG_TRACE(Render_Software, "Output vertex: pos (%.2f, %.2f, %.2f, %.2f), col(%.2f, %.2f, %.2f, %.2f), tc0(%.2f, %.2f)", - ret.pos.x.ToFloat32(), ret.pos.y.ToFloat32(), ret.pos.z.ToFloat32(), ret.pos.w.ToFloat32(), - ret.color.x.ToFloat32(), ret.color.y.ToFloat32(), ret.color.z.ToFloat32(), ret.color.w.ToFloat32(), - ret.tc0.u().ToFloat32(), ret.tc0.v().ToFloat32()); - - return ret; -} - - -} // namespace - -} // namespace |