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-rw-r--r--src/video_core/shader/decode/hfma2.cpp76
1 files changed, 76 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/hfma2.cpp b/src/video_core/shader/decode/hfma2.cpp
new file mode 100644
index 000000000..4a6b945f9
--- /dev/null
+++ b/src/video_core/shader/decode/hfma2.cpp
@@ -0,0 +1,76 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <tuple>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::HalfPrecision;
+using Tegra::Shader::HalfType;
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeHfma2(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+ const Instruction instr = {program_code[pc]};
+ const auto opcode = OpCode::Decode(instr);
+
+ if (opcode->get().GetId() == OpCode::Id::HFMA2_RR) {
+ UNIMPLEMENTED_IF(instr.hfma2.rr.precision != HalfPrecision::None);
+ } else {
+ UNIMPLEMENTED_IF(instr.hfma2.precision != HalfPrecision::None);
+ }
+
+ constexpr auto identity = HalfType::H0_H1;
+
+ const HalfType type_a = instr.hfma2.type_a;
+ const Node op_a = GetRegister(instr.gpr8);
+
+ bool neg_b{}, neg_c{};
+ auto [saturate, type_b, op_b, type_c,
+ op_c] = [&]() -> std::tuple<bool, HalfType, Node, HalfType, Node> {
+ switch (opcode->get().GetId()) {
+ case OpCode::Id::HFMA2_CR:
+ neg_b = instr.hfma2.negate_b;
+ neg_c = instr.hfma2.negate_c;
+ return {instr.hfma2.saturate, instr.hfma2.type_b,
+ GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset), instr.hfma2.type_reg39,
+ GetRegister(instr.gpr39)};
+ case OpCode::Id::HFMA2_RC:
+ neg_b = instr.hfma2.negate_b;
+ neg_c = instr.hfma2.negate_c;
+ return {instr.hfma2.saturate, instr.hfma2.type_reg39, GetRegister(instr.gpr39),
+ instr.hfma2.type_b, GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset)};
+ case OpCode::Id::HFMA2_RR:
+ neg_b = instr.hfma2.rr.negate_b;
+ neg_c = instr.hfma2.rr.negate_c;
+ return {instr.hfma2.rr.saturate, instr.hfma2.type_b, GetRegister(instr.gpr20),
+ instr.hfma2.rr.type_c, GetRegister(instr.gpr39)};
+ case OpCode::Id::HFMA2_IMM_R:
+ neg_c = instr.hfma2.negate_c;
+ return {instr.hfma2.saturate, identity, UnpackHalfImmediate(instr, true),
+ instr.hfma2.type_reg39, GetRegister(instr.gpr39)};
+ default:
+ return {false, identity, Immediate(0), identity, Immediate(0)};
+ }
+ }();
+ UNIMPLEMENTED_IF_MSG(saturate, "HFMA2 saturation is not implemented");
+
+ op_b = GetOperandAbsNegHalf(op_b, false, neg_b);
+ op_c = GetOperandAbsNegHalf(op_c, false, neg_c);
+
+ MetaHalfArithmetic meta{true, {type_a, type_b, type_c}};
+ Node value = Operation(OperationCode::HFma, meta, op_a, op_b, op_c);
+ value = HalfMerge(GetRegister(instr.gpr0), value, instr.hfma2.merge);
+
+ SetRegister(bb, instr.gpr0, value);
+
+ return pc;
+}
+
+} // namespace VideoCommon::Shader \ No newline at end of file