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77 lines
2.9 KiB
C++
77 lines
2.9 KiB
C++
// Copyright 2018 yuzu 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 <tuple>
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#include "common/assert.h"
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#include "common/common_types.h"
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#include "video_core/engines/shader_bytecode.h"
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#include "video_core/shader/shader_ir.h"
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namespace VideoCommon::Shader {
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using Tegra::Shader::HalfPrecision;
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using Tegra::Shader::HalfType;
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using Tegra::Shader::Instruction;
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using Tegra::Shader::OpCode;
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u32 ShaderIR::DecodeHfma2(NodeBlock& bb, u32 pc) {
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const Instruction instr = {program_code[pc]};
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const auto opcode = OpCode::Decode(instr);
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if (opcode->get().GetId() == OpCode::Id::HFMA2_RR) {
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UNIMPLEMENTED_IF(instr.hfma2.rr.precision != HalfPrecision::None);
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} else {
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UNIMPLEMENTED_IF(instr.hfma2.precision != HalfPrecision::None);
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}
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constexpr auto identity = HalfType::H0_H1;
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const HalfType type_a = instr.hfma2.type_a;
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const Node op_a = GetRegister(instr.gpr8);
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bool neg_b{}, neg_c{};
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auto [saturate, type_b, op_b, type_c,
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op_c] = [&]() -> std::tuple<bool, HalfType, Node, HalfType, Node> {
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switch (opcode->get().GetId()) {
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case OpCode::Id::HFMA2_CR:
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neg_b = instr.hfma2.negate_b;
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neg_c = instr.hfma2.negate_c;
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return {instr.hfma2.saturate, instr.hfma2.type_b,
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GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset()),
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instr.hfma2.type_reg39, GetRegister(instr.gpr39)};
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case OpCode::Id::HFMA2_RC:
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neg_b = instr.hfma2.negate_b;
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neg_c = instr.hfma2.negate_c;
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return {instr.hfma2.saturate, instr.hfma2.type_reg39, GetRegister(instr.gpr39),
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instr.hfma2.type_b,
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GetConstBuffer(instr.cbuf34.index, instr.cbuf34.GetOffset())};
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case OpCode::Id::HFMA2_RR:
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neg_b = instr.hfma2.rr.negate_b;
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neg_c = instr.hfma2.rr.negate_c;
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return {instr.hfma2.rr.saturate, instr.hfma2.type_b, GetRegister(instr.gpr20),
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instr.hfma2.rr.type_c, GetRegister(instr.gpr39)};
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case OpCode::Id::HFMA2_IMM_R:
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neg_c = instr.hfma2.negate_c;
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return {instr.hfma2.saturate, identity, UnpackHalfImmediate(instr, true),
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instr.hfma2.type_reg39, GetRegister(instr.gpr39)};
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default:
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return {false, identity, Immediate(0), identity, Immediate(0)};
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}
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}();
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UNIMPLEMENTED_IF_MSG(saturate, "HFMA2 saturation is not implemented");
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op_b = GetOperandAbsNegHalf(op_b, false, neg_b);
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op_c = GetOperandAbsNegHalf(op_c, false, neg_c);
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MetaHalfArithmetic meta{true, {type_a, type_b, type_c}};
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Node value = Operation(OperationCode::HFma, meta, op_a, op_b, op_c);
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value = HalfMerge(GetRegister(instr.gpr0), value, instr.hfma2.merge);
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SetRegister(bb, instr.gpr0, value);
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return pc;
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}
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} // namespace VideoCommon::Shader
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