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605 lines
23 KiB
C++
605 lines
23 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <stack>
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#include <boost/range/algorithm.hpp>
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#include <common/file_util.h>
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#include <core/mem_map.h>
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#include <nihstro/shader_bytecode.h>
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#include "pica.h"
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#include "vertex_shader.h"
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#include "debug_utils/debug_utils.h"
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using nihstro::Instruction;
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using nihstro::RegisterType;
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using nihstro::SourceRegister;
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using nihstro::SwizzlePattern;
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namespace Pica {
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namespace VertexShader {
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static struct {
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Math::Vec4<float24> f[96];
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std::array<bool,16> b;
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std::array<Math::Vec4<u8>,4> i;
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} shader_uniforms;
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// TODO: Not sure where the shader binary and swizzle patterns are supposed to be loaded to!
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// For now, we just keep these local arrays around.
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static std::array<u32, 1024> shader_memory;
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static std::array<u32, 1024> swizzle_data;
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void SubmitShaderMemoryChange(u32 addr, u32 value) {
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shader_memory[addr] = value;
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}
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void SubmitSwizzleDataChange(u32 addr, u32 value) {
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swizzle_data[addr] = value;
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}
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Math::Vec4<float24>& GetFloatUniform(u32 index) {
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return shader_uniforms.f[index];
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}
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bool& GetBoolUniform(u32 index) {
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return shader_uniforms.b[index];
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}
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Math::Vec4<u8>& GetIntUniform(u32 index) {
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return shader_uniforms.i[index];
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}
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const std::array<u32, 1024>& GetShaderBinary() {
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return shader_memory;
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}
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const std::array<u32, 1024>& GetSwizzlePatterns() {
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return swizzle_data;
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}
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struct VertexShaderState {
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u32* program_counter;
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const float24* input_register_table[16];
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float24* output_register_table[7*4];
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Math::Vec4<float24> temporary_registers[16];
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bool conditional_code[2];
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// Two Address registers and one loop counter
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// TODO: How many bits do these actually have?
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s32 address_registers[3];
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enum {
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INVALID_ADDRESS = 0xFFFFFFFF
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};
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struct CallStackElement {
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u32 final_address;
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u32 return_address;
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};
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// TODO: Is there a maximal size for this?
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std::stack<CallStackElement> call_stack;
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struct {
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u32 max_offset; // maximum program counter ever reached
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u32 max_opdesc_id; // maximum swizzle pattern index ever used
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} debug;
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};
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static void ProcessShaderCode(VertexShaderState& state) {
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// Placeholder for invalid inputs
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static float24 dummy_vec4_float24[4];
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while (true) {
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if (!state.call_stack.empty()) {
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if (state.program_counter - shader_memory.data() == state.call_stack.top().final_address) {
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state.program_counter = &shader_memory[state.call_stack.top().return_address];
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state.call_stack.pop();
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// TODO: Is "trying again" accurate to hardware?
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continue;
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}
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}
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bool exit_loop = false;
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const Instruction& instr = *(const Instruction*)state.program_counter;
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const SwizzlePattern& swizzle = *(SwizzlePattern*)&swizzle_data[instr.common.operand_desc_id];
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auto call = [&](VertexShaderState& state, u32 offset, u32 num_instructions, u32 return_offset) {
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state.program_counter = &shader_memory[offset] - 1; // -1 to make sure when incrementing the PC we end up at the correct offset
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state.call_stack.push({ offset + num_instructions, return_offset });
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};
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u32 binary_offset = state.program_counter - shader_memory.data();
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state.debug.max_offset = std::max<u32>(state.debug.max_offset, 1 + binary_offset);
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auto LookupSourceRegister = [&](const SourceRegister& source_reg) -> const float24* {
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switch (source_reg.GetRegisterType()) {
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case RegisterType::Input:
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return state.input_register_table[source_reg.GetIndex()];
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case RegisterType::Temporary:
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return &state.temporary_registers[source_reg.GetIndex()].x;
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case RegisterType::FloatUniform:
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return &shader_uniforms.f[source_reg.GetIndex()].x;
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default:
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return dummy_vec4_float24;
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}
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};
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switch (instr.opcode.GetInfo().type) {
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case Instruction::OpCodeType::Arithmetic:
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{
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bool is_inverted = 0 != (instr.opcode.GetInfo().subtype & Instruction::OpCodeInfo::SrcInversed);
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if (is_inverted) {
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// TODO: We don't really support this properly: For instance, the address register
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// offset needs to be applied to SRC2 instead, etc.
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// For now, we just abort in this situation.
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LOG_CRITICAL(HW_GPU, "Bad condition...");
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exit(0);
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}
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const int address_offset = (instr.common.address_register_index == 0)
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? 0 : state.address_registers[instr.common.address_register_index - 1];
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const float24* src1_ = LookupSourceRegister(instr.common.GetSrc1(is_inverted) + address_offset);
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const float24* src2_ = LookupSourceRegister(instr.common.GetSrc2(is_inverted));
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const bool negate_src1 = ((bool)swizzle.negate_src1 != false);
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const bool negate_src2 = ((bool)swizzle.negate_src2 != false);
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float24 src1[4] = {
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src1_[(int)swizzle.GetSelectorSrc1(0)],
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src1_[(int)swizzle.GetSelectorSrc1(1)],
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src1_[(int)swizzle.GetSelectorSrc1(2)],
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src1_[(int)swizzle.GetSelectorSrc1(3)],
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};
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if (negate_src1) {
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src1[0] = src1[0] * float24::FromFloat32(-1);
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src1[1] = src1[1] * float24::FromFloat32(-1);
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src1[2] = src1[2] * float24::FromFloat32(-1);
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src1[3] = src1[3] * float24::FromFloat32(-1);
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}
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float24 src2[4] = {
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src2_[(int)swizzle.GetSelectorSrc2(0)],
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src2_[(int)swizzle.GetSelectorSrc2(1)],
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src2_[(int)swizzle.GetSelectorSrc2(2)],
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src2_[(int)swizzle.GetSelectorSrc2(3)],
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};
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if (negate_src2) {
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src2[0] = src2[0] * float24::FromFloat32(-1);
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src2[1] = src2[1] * float24::FromFloat32(-1);
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src2[2] = src2[2] * float24::FromFloat32(-1);
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src2[3] = src2[3] * float24::FromFloat32(-1);
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}
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float24* dest = (instr.common.dest < 0x08) ? state.output_register_table[4*instr.common.dest.GetIndex()]
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: (instr.common.dest < 0x10) ? dummy_vec4_float24
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: (instr.common.dest < 0x20) ? &state.temporary_registers[instr.common.dest.GetIndex()][0]
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: dummy_vec4_float24;
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state.debug.max_opdesc_id = std::max<u32>(state.debug.max_opdesc_id, 1+instr.common.operand_desc_id);
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switch (instr.opcode.EffectiveOpCode()) {
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case Instruction::OpCode::ADD:
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{
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for (int i = 0; i < 4; ++i) {
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if (!swizzle.DestComponentEnabled(i))
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continue;
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dest[i] = src1[i] + src2[i];
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}
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break;
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}
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case Instruction::OpCode::MUL:
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{
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for (int i = 0; i < 4; ++i) {
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if (!swizzle.DestComponentEnabled(i))
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continue;
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dest[i] = src1[i] * src2[i];
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}
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break;
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}
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case Instruction::OpCode::MAX:
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for (int i = 0; i < 4; ++i) {
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if (!swizzle.DestComponentEnabled(i))
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continue;
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dest[i] = std::max(src1[i], src2[i]);
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}
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break;
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case Instruction::OpCode::DP3:
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case Instruction::OpCode::DP4:
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{
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float24 dot = float24::FromFloat32(0.f);
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int num_components = (instr.opcode == Instruction::OpCode::DP3) ? 3 : 4;
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for (int i = 0; i < num_components; ++i)
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dot = dot + src1[i] * src2[i];
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for (int i = 0; i < num_components; ++i) {
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if (!swizzle.DestComponentEnabled(i))
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continue;
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dest[i] = dot;
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}
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break;
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}
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// Reciprocal
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case Instruction::OpCode::RCP:
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{
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for (int i = 0; i < 4; ++i) {
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if (!swizzle.DestComponentEnabled(i))
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continue;
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// TODO: Be stable against division by zero!
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// TODO: I think this might be wrong... we should only use one component here
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dest[i] = float24::FromFloat32(1.0 / src1[i].ToFloat32());
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}
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break;
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}
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// Reciprocal Square Root
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case Instruction::OpCode::RSQ:
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{
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for (int i = 0; i < 4; ++i) {
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if (!swizzle.DestComponentEnabled(i))
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continue;
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// TODO: Be stable against division by zero!
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// TODO: I think this might be wrong... we should only use one component here
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dest[i] = float24::FromFloat32(1.0 / sqrt(src1[i].ToFloat32()));
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}
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break;
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}
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case Instruction::OpCode::MOVA:
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{
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for (int i = 0; i < 2; ++i) {
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if (!swizzle.DestComponentEnabled(i))
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continue;
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// TODO: Figure out how the rounding is done on hardware
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state.address_registers[i] = static_cast<s32>(src1[i].ToFloat32());
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}
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break;
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}
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case Instruction::OpCode::MOV:
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{
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for (int i = 0; i < 4; ++i) {
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if (!swizzle.DestComponentEnabled(i))
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continue;
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dest[i] = src1[i];
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}
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break;
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}
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case Instruction::OpCode::CMP:
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for (int i = 0; i < 2; ++i) {
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// TODO: Can you restrict to one compare via dest masking?
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auto compare_op = instr.common.compare_op;
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auto op = (i == 0) ? compare_op.x.Value() : compare_op.y.Value();
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switch (op) {
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case compare_op.Equal:
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state.conditional_code[i] = (src1[i] == src2[i]);
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break;
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case compare_op.NotEqual:
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state.conditional_code[i] = (src1[i] != src2[i]);
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break;
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case compare_op.LessThan:
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state.conditional_code[i] = (src1[i] < src2[i]);
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break;
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case compare_op.LessEqual:
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state.conditional_code[i] = (src1[i] <= src2[i]);
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break;
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case compare_op.GreaterThan:
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state.conditional_code[i] = (src1[i] > src2[i]);
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break;
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case compare_op.GreaterEqual:
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state.conditional_code[i] = (src1[i] >= src2[i]);
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break;
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default:
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LOG_ERROR(HW_GPU, "Unknown compare mode %x", static_cast<int>(op));
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break;
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}
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}
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break;
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default:
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LOG_ERROR(HW_GPU, "Unhandled arithmetic instruction: 0x%02x (%s): 0x%08x",
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(int)instr.opcode.Value(), instr.opcode.GetInfo().name, instr.hex);
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_dbg_assert_(HW_GPU, 0);
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break;
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}
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break;
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}
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case Instruction::OpCodeType::MultiplyAdd:
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{
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if (instr.opcode.EffectiveOpCode() == Instruction::OpCode::MAD) {
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const SwizzlePattern& swizzle = *(SwizzlePattern*)&swizzle_data[instr.mad.operand_desc_id];
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const float24* src1_ = LookupSourceRegister(instr.mad.src1);
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const float24* src2_ = LookupSourceRegister(instr.mad.src2);
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const float24* src3_ = LookupSourceRegister(instr.mad.src3);
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const bool negate_src1 = ((bool)swizzle.negate_src1 != false);
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const bool negate_src2 = ((bool)swizzle.negate_src2 != false);
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const bool negate_src3 = ((bool)swizzle.negate_src3 != false);
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float24 src1[4] = {
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src1_[(int)swizzle.GetSelectorSrc1(0)],
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src1_[(int)swizzle.GetSelectorSrc1(1)],
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src1_[(int)swizzle.GetSelectorSrc1(2)],
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src1_[(int)swizzle.GetSelectorSrc1(3)],
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};
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if (negate_src1) {
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src1[0] = src1[0] * float24::FromFloat32(-1);
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src1[1] = src1[1] * float24::FromFloat32(-1);
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src1[2] = src1[2] * float24::FromFloat32(-1);
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src1[3] = src1[3] * float24::FromFloat32(-1);
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}
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float24 src2[4] = {
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src2_[(int)swizzle.GetSelectorSrc2(0)],
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src2_[(int)swizzle.GetSelectorSrc2(1)],
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src2_[(int)swizzle.GetSelectorSrc2(2)],
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src2_[(int)swizzle.GetSelectorSrc2(3)],
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};
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if (negate_src2) {
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src2[0] = src2[0] * float24::FromFloat32(-1);
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src2[1] = src2[1] * float24::FromFloat32(-1);
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src2[2] = src2[2] * float24::FromFloat32(-1);
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src2[3] = src2[3] * float24::FromFloat32(-1);
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}
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float24 src3[4] = {
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src3_[(int)swizzle.GetSelectorSrc3(0)],
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src3_[(int)swizzle.GetSelectorSrc3(1)],
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src3_[(int)swizzle.GetSelectorSrc3(2)],
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src3_[(int)swizzle.GetSelectorSrc3(3)],
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};
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if (negate_src3) {
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src3[0] = src3[0] * float24::FromFloat32(-1);
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src3[1] = src3[1] * float24::FromFloat32(-1);
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src3[2] = src3[2] * float24::FromFloat32(-1);
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src3[3] = src3[3] * float24::FromFloat32(-1);
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}
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float24* dest = (instr.mad.dest < 0x08) ? state.output_register_table[4*instr.mad.dest.GetIndex()]
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: (instr.mad.dest < 0x10) ? dummy_vec4_float24
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: (instr.mad.dest < 0x20) ? &state.temporary_registers[instr.mad.dest.GetIndex()][0]
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: dummy_vec4_float24;
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for (int i = 0; i < 4; ++i) {
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if (!swizzle.DestComponentEnabled(i))
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continue;
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dest[i] = src1[i] * src2[i] + src3[i];
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}
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} else {
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LOG_ERROR(HW_GPU, "Unhandled multiply-add instruction: 0x%02x (%s): 0x%08x",
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(int)instr.opcode.Value(), instr.opcode.GetInfo().name, instr.hex);
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}
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break;
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}
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default:
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{
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static auto evaluate_condition = [](const VertexShaderState& state, bool refx, bool refy, Instruction::FlowControlType flow_control) {
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bool results[2] = { refx == state.conditional_code[0],
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refy == state.conditional_code[1] };
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switch (flow_control.op) {
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case flow_control.Or:
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return results[0] || results[1];
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case flow_control.And:
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return results[0] && results[1];
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case flow_control.JustX:
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return results[0];
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case flow_control.JustY:
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return results[1];
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}
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};
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// Handle each instruction on its own
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switch (instr.opcode) {
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case Instruction::OpCode::END:
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exit_loop = true;
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break;
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case Instruction::OpCode::JMPC:
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if (evaluate_condition(state, instr.flow_control.refx, instr.flow_control.refy, instr.flow_control)) {
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state.program_counter = &shader_memory[instr.flow_control.dest_offset] - 1;
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}
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break;
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case Instruction::OpCode::JMPU:
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if (shader_uniforms.b[instr.flow_control.bool_uniform_id]) {
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state.program_counter = &shader_memory[instr.flow_control.dest_offset] - 1;
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}
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break;
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case Instruction::OpCode::CALL:
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call(state,
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instr.flow_control.dest_offset,
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instr.flow_control.num_instructions,
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binary_offset + 1);
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break;
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case Instruction::OpCode::CALLU:
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if (shader_uniforms.b[instr.flow_control.bool_uniform_id]) {
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call(state,
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instr.flow_control.dest_offset,
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instr.flow_control.num_instructions,
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binary_offset + 1);
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}
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break;
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case Instruction::OpCode::CALLC:
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if (evaluate_condition(state, instr.flow_control.refx, instr.flow_control.refy, instr.flow_control)) {
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call(state,
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instr.flow_control.dest_offset,
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instr.flow_control.num_instructions,
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binary_offset + 1);
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}
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break;
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case Instruction::OpCode::NOP:
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break;
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case Instruction::OpCode::IFU:
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if (shader_uniforms.b[instr.flow_control.bool_uniform_id]) {
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call(state,
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binary_offset + 1,
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instr.flow_control.dest_offset - binary_offset - 1,
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instr.flow_control.dest_offset + instr.flow_control.num_instructions);
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} else {
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call(state,
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instr.flow_control.dest_offset,
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instr.flow_control.num_instructions,
|
|
instr.flow_control.dest_offset + instr.flow_control.num_instructions);
|
|
}
|
|
|
|
break;
|
|
|
|
case Instruction::OpCode::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,
|
|
binary_offset + 1,
|
|
instr.flow_control.dest_offset - binary_offset - 1,
|
|
instr.flow_control.dest_offset + instr.flow_control.num_instructions);
|
|
} else {
|
|
call(state,
|
|
instr.flow_control.dest_offset,
|
|
instr.flow_control.num_instructions,
|
|
instr.flow_control.dest_offset + instr.flow_control.num_instructions);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
LOG_ERROR(HW_GPU, "Unhandled instruction: 0x%02x (%s): 0x%08x",
|
|
(int)instr.opcode.Value(), instr.opcode.GetInfo().name, instr.hex);
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
++state.program_counter;
|
|
|
|
if (exit_loop)
|
|
break;
|
|
}
|
|
}
|
|
|
|
OutputVertex RunShader(const InputVertex& input, int num_attributes) {
|
|
VertexShaderState state;
|
|
|
|
const u32* main = &shader_memory[registers.vs_main_offset];
|
|
state.program_counter = (u32*)main;
|
|
state.debug.max_offset = 0;
|
|
state.debug.max_opdesc_id = 0;
|
|
|
|
// Setup input register table
|
|
const auto& attribute_register_map = registers.vs_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;
|
|
|
|
// Setup output register table
|
|
OutputVertex ret;
|
|
// Zero output so that attributes which aren't output won't have denormals in them, which will
|
|
// slow us down later.
|
|
memset(&ret, 0, sizeof(ret));
|
|
|
|
for (int i = 0; i < 7; ++i) {
|
|
const auto& output_register_map = registers.vs_output_attributes[i];
|
|
|
|
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)
|
|
state.output_register_table[4*i+comp] = ((float24*)&ret) + semantics[comp];
|
|
}
|
|
|
|
state.conditional_code[0] = false;
|
|
state.conditional_code[1] = false;
|
|
|
|
ProcessShaderCode(state);
|
|
DebugUtils::DumpShader(shader_memory.data(), state.debug.max_offset, swizzle_data.data(),
|
|
state.debug.max_opdesc_id, registers.vs_main_offset,
|
|
registers.vs_output_attributes);
|
|
|
|
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
|