shader: Implement LOP and LOP3

src/shader_recompiler/frontend/maxwell/translate/impl/logic_operation.cpp

@@ -0,0 +1,77 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/common_funcs.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+
+namespace Shader::Maxwell {
+namespace {
+enum class LogicalOp : u64 {
+    AND,
+    OR,
+    XOR,
+    PASS_B,
+};
+
+[[nodiscard]] IR::U32 LogicalOperation(IR::IREmitter& ir, const IR::U32& operand_1,
+                                       const IR::U32& operand_2, LogicalOp op) {
+    switch (op) {
+    case LogicalOp::AND:
+        return ir.BitwiseAnd(operand_1, operand_2);
+    case LogicalOp::OR:
+        return ir.BitwiseOr(operand_1, operand_2);
+    case LogicalOp::XOR:
+        return ir.BitwiseXor(operand_1, operand_2);
+    case LogicalOp::PASS_B:
+        return operand_2;
+    default:
+        throw NotImplementedException("Invalid Logical operation {}", op);
+    }
+}
+
+void LOP(TranslatorVisitor& v, u64 insn, IR::U32 op_b) {
+    union {
+        u64 insn;
+        BitField<0, 8, IR::Reg> dest_reg;
+        BitField<8, 8, IR::Reg> src_reg;
+        BitField<39, 1, u64> neg_a;
+        BitField<40, 1, u64> neg_b;
+        BitField<41, 2, LogicalOp> bit_op;
+        BitField<43, 1, u64> x;
+        BitField<44, 2, PredicateOp> pred_op;
+        BitField<48, 3, IR::Pred> pred;
+    } const lop{insn};
+
+    if (lop.x != 0) {
+        throw NotImplementedException("LOP X");
+    }
+    IR::U32 op_a{v.X(lop.src_reg)};
+    if (lop.neg_a != 0) {
+        op_a = v.ir.BitwiseNot(op_a);
+    }
+    if (lop.neg_b != 0) {
+        op_b = v.ir.BitwiseNot(op_b);
+    }
+
+    const IR::U32 result{LogicalOperation(v.ir, op_a, op_b, lop.bit_op)};
+    const IR::U1 pred_result{PredicateOperation(v.ir, result, lop.pred_op)};
+    v.X(lop.dest_reg, result);
+    v.ir.SetPred(lop.pred, pred_result);
+}
+} // Anonymous namespace
+
+void TranslatorVisitor::LOP_reg(u64 insn) {
+    LOP(*this, insn, GetReg20(insn));
+}
+
+void TranslatorVisitor::LOP_cbuf(u64 insn) {
+    LOP(*this, insn, GetCbuf(insn));
+}
+
+void TranslatorVisitor::LOP_imm(u64 insn) {
+    LOP(*this, insn, GetImm20(insn));
+}
+} // namespace Shader::Maxwell