mirror of
https://github.com/azahar-emu/dynarmic
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57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/* This file is part of the dynarmic project.
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* Copyright (c) 2018 MerryMage
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* This software may be used and distributed according to the terms of the GNU
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* General Public License version 2 or any later version.
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*/
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#include "frontend/A64/translate/impl/impl.h"
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namespace Dynarmic {
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namespace A64 {
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bool TranslatorVisitor::REV(bool sf, bool opc_0, Reg Rn, Reg Rd) {
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const size_t datasize = sf ? 64 : 32;
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if (!sf && opc_0) return UnallocatedEncoding();
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const IR::U32U64 operand = X(datasize, Rn);
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if (sf) {
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X(datasize, Rd, ir.ByteReverseDual(operand));
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} else {
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X(datasize, Rd, ir.ByteReverseWord(operand));
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}
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return true;
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}
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bool TranslatorVisitor::REV32_int(Reg Rn, Reg Rd) {
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const IR::U64 operand = ir.GetX(Rn);
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const IR::U32 lo = ir.ByteReverseWord(ir.LeastSignificantWord(operand));
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const IR::U32 hi = ir.ByteReverseWord(ir.MostSignificantWord(operand).result);
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const IR::U64 result = ir.Pack2x32To1x64(lo, hi);
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X(64, Rd, result);
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return true;
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}
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bool TranslatorVisitor::REV16_int(bool sf, Reg Rn, Reg Rd) {
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const size_t datasize = sf ? 64 : 32;
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if (sf) {
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const IR::U64 operand = X(datasize, Rn);
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const IR::U64 hihalf = ir.And(ir.LogicalShiftRight(operand, ir.Imm8(8)), ir.Imm64(0x00FF00FF00FF00FF));
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const IR::U64 lohalf = ir.And(ir.LogicalShiftLeft(operand, ir.Imm8(8)), ir.Imm64(0xFF00FF00FF00FF00));
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const IR::U64 result = ir.Or(hihalf, lohalf);
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X(datasize, Rd, result);
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} else {
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const IR::U32 operand = X(datasize, Rn);
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const IR::U32 hihalf = ir.And(ir.LogicalShiftRight(operand, ir.Imm8(8)), ir.Imm32(0x00FF00FF));
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const IR::U32 lohalf = ir.And(ir.LogicalShiftLeft(operand, ir.Imm8(8)), ir.Imm32(0xFF00FF00));
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const IR::U32 result = ir.Or(hihalf, lohalf);
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X(datasize, Rd, result);
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}
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return true;
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}
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} // namespace A64
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} // namespace Dynarmic
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