gl_shader_decompiler: Implement HADD2_IMM and HMUL2_IMM
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@ -589,6 +589,31 @@ union Instruction {
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BitField<35, 2, HalfType> type_c;
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} alu_half;
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union {
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BitField<39, 2, HalfPrecision> precision;
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BitField<39, 1, u64> ftz;
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BitField<52, 1, u64> saturate;
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BitField<49, 2, HalfMerge> merge;
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BitField<43, 1, u64> negate_a;
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BitField<44, 1, u64> abs_a;
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BitField<47, 2, HalfType> type_a;
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} alu_half_imm;
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union {
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BitField<29, 1, u64> first_negate;
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BitField<20, 9, u64> first;
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BitField<56, 1, u64> second_negate;
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BitField<30, 9, u64> second;
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u32 PackImmediates() const {
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// Immediates are half floats shifted.
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constexpr u32 imm_shift = 6;
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return static_cast<u32>((first << imm_shift) | (second << (16 + imm_shift)));
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}
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} half_imm;
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union {
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BitField<40, 1, u64> invert;
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} popc;
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@ -1183,8 +1208,10 @@ public:
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LEA_HI,
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HADD2_C,
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HADD2_R,
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HADD2_IMM,
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HMUL2_C,
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HMUL2_R,
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HMUL2_IMM,
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POPC_C,
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POPC_R,
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POPC_IMM,
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@ -1259,6 +1286,7 @@ public:
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ArithmeticInteger,
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ArithmeticIntegerImmediate,
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ArithmeticHalf,
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ArithmeticHalfImmediate,
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Bfe,
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Shift,
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Ffma,
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@ -1432,8 +1460,10 @@ private:
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INST("00011000--------", Id::LEA_HI, Type::ArithmeticInteger, "LEA_HI"),
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INST("0111101-1-------", Id::HADD2_C, Type::ArithmeticHalf, "HADD2_C"),
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INST("0101110100010---", Id::HADD2_R, Type::ArithmeticHalf, "HADD2_R"),
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INST("0111101-0-------", Id::HADD2_IMM, Type::ArithmeticHalfImmediate, "HADD2_IMM"),
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INST("0111100-1-------", Id::HMUL2_C, Type::ArithmeticHalf, "HMUL2_C"),
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INST("0101110100001---", Id::HMUL2_R, Type::ArithmeticHalf, "HMUL2_R"),
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INST("0111100-0-------", Id::HMUL2_IMM, Type::ArithmeticHalfImmediate, "HMUL2_IMM"),
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INST("0101000010000---", Id::MUFU, Type::Arithmetic, "MUFU"),
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INST("0100110010010---", Id::RRO_C, Type::Arithmetic, "RRO_C"),
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INST("0101110010010---", Id::RRO_R, Type::Arithmetic, "RRO_R"),
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@ -920,6 +920,19 @@ private:
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return fmt::format("uintBitsToFloat({})", instr.alu.GetImm20_32());
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}
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/// Generates code representing a vec2 pair unpacked from a half float immediate
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static std::string UnpackHalfImmediate(const Instruction& instr, bool negate) {
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const std::string immediate = GetHalfFloat(std::to_string(instr.half_imm.PackImmediates()));
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if (!negate) {
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return immediate;
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}
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const std::string negate_first = instr.half_imm.first_negate != 0 ? "-" : "";
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const std::string negate_second = instr.half_imm.second_negate != 0 ? "-" : "";
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const std::string negate_vec = "vec2(" + negate_first + "1, " + negate_second + "1)";
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return '(' + immediate + " * " + negate_vec + ')';
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}
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/// Generates code representing a texture sampler.
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std::string GetSampler(const Sampler& sampler, Tegra::Shader::TextureType type, bool is_array,
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bool is_shadow) {
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@ -1877,6 +1890,36 @@ private:
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instr.alu_half.saturate != 0);
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break;
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}
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case OpCode::Type::ArithmeticHalfImmediate: {
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if (opcode->GetId() == OpCode::Id::HADD2_IMM) {
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ASSERT_MSG(instr.alu_half_imm.ftz == 0, "Unimplemented");
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} else {
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ASSERT_MSG(instr.alu_half_imm.precision == Tegra::Shader::HalfPrecision::None,
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"Unimplemented");
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}
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const std::string op_a = GetHalfFloat(
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regs.GetRegisterAsInteger(instr.gpr8, 0, false), instr.alu_half_imm.type_a,
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instr.alu_half_imm.abs_a != 0, instr.alu_half_imm.negate_a != 0);
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const std::string op_b = UnpackHalfImmediate(instr, true);
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const std::string result = [&]() {
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switch (opcode->GetId()) {
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case OpCode::Id::HADD2_IMM:
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return op_a + " + " + op_b;
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case OpCode::Id::HMUL2_IMM:
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return op_a + " * " + op_b;
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default:
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UNREACHABLE();
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return std::string("0");
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}
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}();
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regs.SetRegisterToHalfFloat(instr.gpr0, 0, result, instr.alu_half_imm.merge, 1, 1,
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instr.alu_half_imm.saturate != 0);
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break;
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}
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case OpCode::Type::Ffma: {
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const std::string op_a = regs.GetRegisterAsFloat(instr.gpr8);
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std::string op_b = instr.ffma.negate_b ? "-" : "";
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