From 047e238d09589c2f47376cab3c91bb8806c811cc Mon Sep 17 00:00:00 2001 From: SachinVin Date: Sun, 24 Apr 2022 00:30:36 +0530 Subject: [PATCH] shader_jit: Compile nested loops and use `T_NEAR` instead of the default in Compile_BREAKC --- .../shader/shader_jit_x64_compiler.cpp | 148 ++++++++++++++++-- .../shader/shader_jit_x64_compiler.cpp | 30 ++-- .../shader/shader_jit_x64_compiler.h | 8 +- 3 files changed, 155 insertions(+), 31 deletions(-) diff --git a/src/tests/video_core/shader/shader_jit_x64_compiler.cpp b/src/tests/video_core/shader/shader_jit_x64_compiler.cpp index d4576acac..85eab4428 100644 --- a/src/tests/video_core/shader/shader_jit_x64_compiler.cpp +++ b/src/tests/video_core/shader/shader_jit_x64_compiler.cpp @@ -7,28 +7,28 @@ #include #include #include +#include "video_core/shader/shader_interpreter.h" #include "video_core/shader/shader_jit_x64_compiler.h" using float24 = Pica::float24; using JitShader = Pica::Shader::JitShader; +using ShaderInterpreter = Pica::Shader::InterpreterEngine; using DestRegister = nihstro::DestRegister; using OpCode = nihstro::OpCode; using SourceRegister = nihstro::SourceRegister; +using Type = nihstro::InlineAsm::Type; -static std::unique_ptr CompileShader(std::initializer_list code) { +static std::unique_ptr CompileShaderSetup( + std::initializer_list code) { const auto shbin = nihstro::InlineAsm::CompileToRawBinary(code); - std::array program_code{}; - std::array swizzle_data{}; + auto shader = std::make_unique(); - std::transform(shbin.program.begin(), shbin.program.end(), program_code.begin(), + std::transform(shbin.program.begin(), shbin.program.end(), shader->program_code.begin(), [](const auto& x) { return x.hex; }); - std::transform(shbin.swizzle_table.begin(), shbin.swizzle_table.end(), swizzle_data.begin(), - [](const auto& x) { return x.hex; }); - - auto shader = std::make_unique(); - shader->Compile(&program_code, &swizzle_data); + std::transform(shbin.swizzle_table.begin(), shbin.swizzle_table.end(), + shader->swizzle_data.begin(), [](const auto& x) { return x.hex; }); return shader; } @@ -36,19 +36,32 @@ static std::unique_ptr CompileShader(std::initializer_list code) - : shader(CompileShader(code)) {} + : shader_setup(CompileShaderSetup(code)) { + shader_jit.Compile(&shader_setup->program_code, &shader_setup->swizzle_data); + } float Run(float input) { - Pica::Shader::ShaderSetup shader_setup; Pica::Shader::UnitState shader_unit; - - shader_unit.registers.input[0].x = float24::FromFloat32(input); - shader->Run(shader_setup, shader_unit, 0); + RunJit(shader_unit, input); return shader_unit.registers.output[0].x.ToFloat32(); } + void RunJit(Pica::Shader::UnitState& shader_unit, float input) { + shader_unit.registers.input[0].x = float24::FromFloat32(input); + shader_unit.registers.temporary[0].x = float24::FromFloat32(0); + shader_jit.Run(*shader_setup, shader_unit, 0); + } + + void RunInterpreter(Pica::Shader::UnitState& shader_unit, float input) { + shader_unit.registers.input[0].x = float24::FromFloat32(input); + shader_unit.registers.temporary[0].x = float24::FromFloat32(0); + shader_interpreter.Run(*shader_setup, shader_unit); + } + public: - std::unique_ptr shader; + JitShader shader_jit; + ShaderInterpreter shader_interpreter; + std::unique_ptr shader_setup; }; TEST_CASE("LG2", "[video_core][shader][shader_jit]") { @@ -89,3 +102,108 @@ TEST_CASE("EX2", "[video_core][shader][shader_jit]") { REQUIRE(shader.Run(79.7262742773f) == Approx(1.e24f)); REQUIRE(std::isinf(shader.Run(800.f))); } + +TEST_CASE("Nested Loop", "[video_core][shader][shader_jit]") { + const auto sh_input = SourceRegister::MakeInput(0); + const auto sh_temp = SourceRegister::MakeTemporary(0); + const auto sh_output = DestRegister::MakeOutput(0); + + std::array, 2> loop_parms{Common::Vec4{4, 0, 1, 0}, + Common::Vec4{4, 0, 1, 0}}; + + auto shader_test = ShaderTest({ + // clang-format off + {OpCode::Id::LOOP, 0}, + {OpCode::Id::LOOP, 1}, + {OpCode::Id::ADD, sh_temp, sh_temp, sh_input}, + {Type::EndLoop}, + {Type::EndLoop}, + {OpCode::Id::MOV, sh_output, sh_temp}, + {OpCode::Id::END}, + // clang-format on + }); + + shader_test.shader_setup->uniforms.i[0] = loop_parms[0]; + shader_test.shader_setup->uniforms.i[1] = loop_parms[0]; + + const auto run_test_helper = [&shader_test](float input) { + Pica::Shader::UnitState shader_unit_jit; + Pica::Shader::UnitState shader_unit_inter; + shader_test.RunJit(shader_unit_jit, input); + shader_test.RunInterpreter(shader_unit_inter, input); + + REQUIRE(shader_unit_jit.registers.output[0].x.ToFloat32() == + Approx(shader_unit_inter.registers.output[0].x.ToFloat32())); + REQUIRE(shader_unit_jit.address_registers[2] == shader_unit_inter.address_registers[2]); + }; + { + // Sanity check + Pica::Shader::UnitState shader_unit_jit; + shader_test.RunJit(shader_unit_jit, 1.0f); + REQUIRE(shader_unit_jit.address_registers[2] == 6); + REQUIRE(shader_unit_jit.registers.output[0].x.ToFloat32() == Approx(25.0f)); + + Pica::Shader::UnitState shader_unit_inter; + shader_test.RunInterpreter(shader_unit_inter, 2.0f); + REQUIRE(shader_unit_inter.address_registers[2] == 6); + REQUIRE(shader_unit_inter.registers.output[0].x.ToFloat32() == Approx(50.0f)); + } + run_test_helper(-5.f); + run_test_helper(0.f); + run_test_helper(2.f); + run_test_helper(6.f); + run_test_helper(79.7262742773f); +} + +TEST_CASE("Nested Loop Randomized", "[video_core][shader][shader_jit]") { + const auto sh_input = SourceRegister::MakeInput(0); + const auto sh_temp = SourceRegister::MakeTemporary(0); + const auto sh_output = DestRegister::MakeOutput(0); + + auto shader_test = ShaderTest({ + // clang-format off + {OpCode::Id::LOOP, 0}, + {OpCode::Id::LOOP, 1}, + {OpCode::Id::LOOP, 2}, + {OpCode::Id::LOOP, 3}, + {OpCode::Id::ADD, sh_temp, sh_temp, sh_input}, + {Type::EndLoop}, + {Type::EndLoop}, + {Type::EndLoop}, + {Type::EndLoop}, + + {OpCode::Id::MOV, sh_output, sh_temp}, + {OpCode::Id::END}, + // clang-format on + }); + + const auto generate_loop_parms = [] { + u8 iterations = 1 + rand(); + u8 initial = 1 + rand(); + u8 increment = 1 + rand(); + + Common::Vec4 loop_parm{iterations, initial, increment, 0}; + return Common::Vec4{iterations, initial, increment, 0}; + }; + + const auto run_test_helper = [&shader_test](float input) { + Pica::Shader::UnitState shader_unit_jit; + Pica::Shader::UnitState shader_unit_inter; + shader_test.RunJit(shader_unit_jit, input); + shader_test.RunInterpreter(shader_unit_inter, input); + + REQUIRE(shader_unit_jit.registers.output[0].x.ToFloat32() == + Approx(shader_unit_inter.registers.output[0].x.ToFloat32())); + REQUIRE(shader_unit_jit.address_registers[2] == shader_unit_inter.address_registers[2]); + }; + + srand(time(0)); + for (int i = 0; i < 10; i++) { + shader_test.shader_setup->uniforms.i[0] = generate_loop_parms(); + shader_test.shader_setup->uniforms.i[1] = generate_loop_parms(); + shader_test.shader_setup->uniforms.i[2] = generate_loop_parms(); + shader_test.shader_setup->uniforms.i[3] = generate_loop_parms(); + float input = -(RAND_MAX / 2) + rand(); + run_test_helper(input); + } +} diff --git a/src/video_core/shader/shader_jit_x64_compiler.cpp b/src/video_core/shader/shader_jit_x64_compiler.cpp index 606762788..5753187e9 100644 --- a/src/video_core/shader/shader_jit_x64_compiler.cpp +++ b/src/video_core/shader/shader_jit_x64_compiler.cpp @@ -595,11 +595,11 @@ void JitShader::Compile_END(Instruction instr) { } void JitShader::Compile_BREAKC(Instruction instr) { - Compile_Assert(looping, "BREAKC must be inside a LOOP"); - if (looping) { + Compile_Assert(loop_depth, "BREAKC must be inside a LOOP"); + if (loop_depth) { Compile_EvaluateCondition(instr); - ASSERT(loop_break_label); - jnz(*loop_break_label); + ASSERT(!loop_break_labels.empty()); + jnz(loop_break_labels.back(), T_NEAR); } } @@ -725,9 +725,11 @@ void JitShader::Compile_IF(Instruction instr) { void JitShader::Compile_LOOP(Instruction instr) { Compile_Assert(instr.flow_control.dest_offset >= program_counter, "Backwards loops not supported"); - Compile_Assert(!looping, "Nested loops not supported"); - - looping = true; + if (loop_depth++) { + // LOOPCOUNT_REG is a "global", so we don't save it here. + push(LOOPINC.cvt64()); + push(LOOPCOUNT.cvt64()); + } // This decodes the fields from the integer uniform at index instr.flow_control.int_uniform_id. // The Y (LOOPCOUNT_REG) and Z (LOOPINC) component are kept multiplied by 16 (Left shifted by @@ -746,16 +748,20 @@ void JitShader::Compile_LOOP(Instruction instr) { Label l_loop_start; L(l_loop_start); - loop_break_label = Xbyak::Label(); + loop_break_labels.emplace_back(Xbyak::Label()); Compile_Block(instr.flow_control.dest_offset + 1); add(LOOPCOUNT_REG, LOOPINC); // Increment LOOPCOUNT_REG by Z-component sub(LOOPCOUNT, 1); // Increment loop count by 1 jnz(l_loop_start); // Loop if not equal - L(*loop_break_label); - loop_break_label.reset(); - looping = false; + L(loop_break_labels.back()); + loop_break_labels.pop_back(); + + if (--loop_depth) { + pop(LOOPCOUNT.cvt64()); + pop(LOOPINC.cvt64()); + } } void JitShader::Compile_JMP(Instruction instr) { @@ -892,7 +898,7 @@ void JitShader::Compile(const std::array* program_ // Reset flow control state program = (CompiledShader*)getCurr(); program_counter = 0; - looping = false; + loop_depth = 0; instruction_labels.fill(Xbyak::Label()); // Find all `CALL` instructions and identify return locations diff --git a/src/video_core/shader/shader_jit_x64_compiler.h b/src/video_core/shader/shader_jit_x64_compiler.h index 507cd0ff3..573bdf8d3 100644 --- a/src/video_core/shader/shader_jit_x64_compiler.h +++ b/src/video_core/shader/shader_jit_x64_compiler.h @@ -120,15 +120,15 @@ private: /// Mapping of Pica VS instructions to pointers in the emitted code std::array instruction_labels; - /// Label pointing to the end of the current LOOP block. Used by the BREAKC instruction to break - /// out of the loop. - std::optional loop_break_label; + /// Labels pointing to the end of each nested LOOP block. Used by the BREAKC instruction to + /// break out of a loop. + std::vector loop_break_labels; /// Offsets in code where a return needs to be inserted std::vector return_offsets; unsigned program_counter = 0; ///< Offset of the next instruction to decode - bool looping = false; ///< True if compiling a loop, used to check for nested loops + u8 loop_depth = 0; ///< Depth of the (nested) loops currently compiled using CompiledShader = void(const void* setup, void* state, const u8* start_addr); CompiledShader* program = nullptr;