A64: Implement ASRV, LSLV, LSRV, and RORV

src/frontend/A64/translate/impl/data_processing_shift.cpp

@@ -0,0 +1,66 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2018 MerryMage
+ * This software may be used and distributed according to the terms of the GNU
+ * General Public License version 2 or any later version.
+ */
+
+#include "frontend/A64/translate/impl/impl.h"
+
+namespace Dynarmic {
+namespace A64 {
+
+static IR::U8 SanitizeShiftAmount(TranslatorVisitor& tv, IREmitter& ir, size_t datasize,
+                                  const IR::U32U64& amount) {
+    return ir.LeastSignificantByte(ir.And(amount, tv.I(datasize, datasize - 1)));
+}
+
+bool TranslatorVisitor::LSLV(bool sf, Reg Rm, Reg Rn, Reg Rd) {
+    const size_t datasize = sf ? 64 : 32;
+
+    const IR::U32U64 operand = X(datasize, Rn);
+    const IR::U32U64 shift_amount = X(datasize, Rm);
+
+    const IR::U32U64 result = ir.LogicalShiftLeft(operand, SanitizeShiftAmount(*this, ir, datasize, shift_amount));
+
+    X(datasize, Rd, result);
+    return true;
+}
+
+bool TranslatorVisitor::LSRV(bool sf, Reg Rm, Reg Rn, Reg Rd) {
+    const size_t datasize = sf ? 64 : 32;
+
+    const IR::U32U64 operand = X(datasize, Rn);
+    const IR::U32U64 shift_amount = X(datasize, Rm);
+
+    const IR::U32U64 result = ir.LogicalShiftRight(operand, SanitizeShiftAmount(*this, ir, datasize, shift_amount));
+
+    X(datasize, Rd, result);
+    return true;
+}
+
+bool TranslatorVisitor::ASRV(bool sf, Reg Rm, Reg Rn, Reg Rd) {
+    const size_t datasize = sf ? 64 : 32;
+
+    const IR::U32U64 operand = X(datasize, Rn);
+    const IR::U32U64 shift_amount = X(datasize, Rm);
+
+    const IR::U32U64 result = ir.ArithmeticShiftRight(operand, SanitizeShiftAmount(*this, ir, datasize, shift_amount));
+
+    X(datasize, Rd, result);
+    return true;
+}
+
+bool TranslatorVisitor::RORV(bool sf, Reg Rm, Reg Rn, Reg Rd) {
+    const size_t datasize = sf ? 64 : 32;
+
+    const IR::U32U64 operand = X(datasize, Rn);
+    const IR::U32U64 shift_amount = X(datasize, Rm);
+
+    const IR::U32U64 result = ir.RotateRight(operand, SanitizeShiftAmount(*this, ir, datasize, shift_amount));
+
+    X(datasize, Rd, result);
+    return true;
+}
+
+} // namespace A64
+} // namespace Dynarmic