1 files changed, 51 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/arithmetic_half_immediate.cpp b/src/video_core/shader/decode/arithmetic_half_immediate.cpp
new file mode 100644
index 000000000..7b4f7d284
--- /dev/null
+++ b/src/video_core/shader/decode/arithmetic_half_immediate.cpp
@@ -0,0 +1,51 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#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::Instruction;
+using Tegra::Shader::OpCode;
+
+u32 ShaderIR::DecodeArithmeticHalfImmediate(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::HADD2_IMM) {
+        UNIMPLEMENTED_IF(instr.alu_half_imm.ftz != 0);
+    } else {
+        UNIMPLEMENTED_IF(instr.alu_half_imm.precision != Tegra::Shader::HalfPrecision::None);
+    }
+    UNIMPLEMENTED_IF_MSG(instr.alu_half_imm.saturate != 0,
+                         "Half float immediate saturation not implemented");
+
+    Node op_a = GetRegister(instr.gpr8);
+    op_a = GetOperandAbsNegHalf(op_a, instr.alu_half_imm.abs_a, instr.alu_half_imm.negate_a);
+
+    const Node op_b = UnpackHalfImmediate(instr, true);
+
+    Node value = [&]() {
+        MetaHalfArithmetic meta{true, {instr.alu_half_imm.type_a}};
+        switch (opcode->get().GetId()) {
+        case OpCode::Id::HADD2_IMM:
+            return Operation(OperationCode::HAdd, meta, op_a, op_b);
+        case OpCode::Id::HMUL2_IMM:
+            return Operation(OperationCode::HMul, meta, op_a, op_b);
+        default:
+            UNREACHABLE();
+            return Immediate(0);
+        }
+    }();
+    value = HalfMerge(GetRegister(instr.gpr0), value, instr.alu_half_imm.merge);
+
+    SetRegister(bb, instr.gpr0, value);
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
+\ No newline at end of file