89 lines
3.2 KiB
C
89 lines
3.2 KiB
C
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/* This file is part of the dynarmic project.
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* Copyright (c) 2016 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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#pragma once
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#include "frontend/arm_types.h"
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#include "frontend/ir_emitter.h"
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namespace Dynarmic {
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namespace Arm {
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class TranslatorVisitor {
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public:
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IREmitter ir;
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void thumb1_LSL_imm(Imm5 imm5, Reg m, Reg d) {
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u8 shift_n = imm5;
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// LSLS <Rd>, <Rm>, #<imm5>
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auto cpsr_c = ir.GetCFlag();
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auto result = ir.LogicalShiftLeft(ir.GetRegister(m), ir.Imm8(shift_n), cpsr_c);
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ir.SetRegister(d, result.result);
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ir.SetNFlag(ir.MostSignificantBit(result.result));
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ir.SetZFlag(ir.IsZero(result.result));
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ir.SetCFlag(result.carry);
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}
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void thumb1_LSR_imm(Imm5 imm5, Reg m, Reg d) {
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u8 shift_n = imm5 != 0 ? imm5 : 32;
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// LSRS <Rd>, <Rm>, #<imm5>
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auto cpsr_c = ir.GetCFlag();
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auto result = ir.LogicalShiftRight(ir.GetRegister(m), ir.Imm8(shift_n), cpsr_c);
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ir.SetRegister(d, result.result);
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ir.SetNFlag(ir.MostSignificantBit(result.result));
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ir.SetZFlag(ir.IsZero(result.result));
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ir.SetCFlag(result.carry);
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}
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void thumb1_ASR_imm(Imm5 imm5, Reg m, Reg d) {
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u8 shift_n = imm5 != 0 ? imm5 : 32;
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// ASRS <Rd>, <Rm>, #<imm5>
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auto cpsr_c = ir.GetCFlag();
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auto result = ir.ArithmeticShiftRight(ir.GetRegister(m), ir.Imm8(shift_n), cpsr_c);
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ir.SetRegister(d, result.result);
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ir.SetNFlag(ir.MostSignificantBit(result.result));
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ir.SetZFlag(ir.IsZero(result.result));
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ir.SetCFlag(result.carry);
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}
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void thumb1_LSL_reg(Reg m, Reg d_n) {
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const Reg d = d_n, n = d_n;
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// LSLS <Rdn>, <Rm>
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auto shift_n = ir.LeastSignificantByte(ir.GetRegister(m));
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auto apsr_c = ir.GetCFlag();
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auto result_carry = ir.LogicalShiftLeft(ir.GetRegister(n), shift_n, apsr_c);
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ir.SetRegister(d, result_carry.result);
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ir.SetNFlag(ir.MostSignificantBit(result_carry.result));
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ir.SetZFlag(ir.IsZero(result_carry.result));
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ir.SetCFlag(result_carry.carry);
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}
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void thumb1_LSR_reg(Reg m, Reg d_n) {
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const Reg d = d_n, n = d_n;
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// LSRS <Rdn>, <Rm>
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auto shift_n = ir.LeastSignificantByte(ir.GetRegister(m));
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auto cpsr_c = ir.GetCFlag();
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auto result = ir.LogicalShiftRight(ir.GetRegister(n), shift_n, cpsr_c);
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ir.SetRegister(d, result.result);
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ir.SetNFlag(ir.MostSignificantBit(result.result));
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ir.SetZFlag(ir.IsZero(result.result));
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ir.SetCFlag(result.carry);
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}
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void thumb1_ASR_reg(Reg m, Reg d_n) {
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const Reg d = d_n, n = d_n;
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// ASRS <Rdn>, <Rm>
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auto shift_n = ir.LeastSignificantByte(ir.GetRegister(m));
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auto cpsr_c = ir.GetCFlag();
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auto result = ir.ArithmeticShiftRight(ir.GetRegister(n), shift_n, cpsr_c);
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ir.SetRegister(d, result.result);
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ir.SetNFlag(ir.MostSignificantBit(result.result));
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ir.SetZFlag(ir.IsZero(result.result));
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ir.SetCFlag(result.carry);
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}
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void thumb1_UDF() {}
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};
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} // namespace Arm
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} // namepsace Dynarmic
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