1 /* This file is part of the dynarmic project.
2 * Copyright (c) 2016 MerryMage
3 * SPDX-License-Identifier: 0BSD
4 */
5
6 #include "frontend/A32/translate/impl/translate_arm.h"
7
8 namespace Dynarmic::A32 {
9
10 // PKHBT<c> <Rd>, <Rn>, <Rm>{, LSL #<imm>}
arm_PKHBT(Cond cond,Reg n,Reg d,Imm<5> imm5,Reg m)11 bool ArmTranslatorVisitor::arm_PKHBT(Cond cond, Reg n, Reg d, Imm<5> imm5, Reg m) {
12 if (n == Reg::PC || d == Reg::PC || m == Reg::PC) {
13 return UnpredictableInstruction();
14 }
15
16 if (!ConditionPassed(cond)) {
17 return true;
18 }
19
20 const auto shifted = EmitImmShift(ir.GetRegister(m), ShiftType::LSL, imm5, ir.Imm1(false)).result;
21 const auto lower_half = ir.And(ir.GetRegister(n), ir.Imm32(0x0000FFFF));
22 const auto upper_half = ir.And(shifted, ir.Imm32(0xFFFF0000));
23
24 ir.SetRegister(d, ir.Or(lower_half, upper_half));
25 return true;
26 }
27
28 // PKHTB<c> <Rd>, <Rn>, <Rm>{, ASR #<imm>}
arm_PKHTB(Cond cond,Reg n,Reg d,Imm<5> imm5,Reg m)29 bool ArmTranslatorVisitor::arm_PKHTB(Cond cond, Reg n, Reg d, Imm<5> imm5, Reg m) {
30 if (n == Reg::PC || d == Reg::PC || m == Reg::PC) {
31 return UnpredictableInstruction();
32 }
33
34 if (!ConditionPassed(cond)) {
35 return true;
36 }
37
38 const auto shifted = EmitImmShift(ir.GetRegister(m), ShiftType::ASR, imm5, ir.Imm1(false)).result;
39 const auto lower_half = ir.And(shifted, ir.Imm32(0x0000FFFF));
40 const auto upper_half = ir.And(ir.GetRegister(n), ir.Imm32(0xFFFF0000));
41
42 ir.SetRegister(d, ir.Or(lower_half, upper_half));
43 return true;
44 }
45
46 } // namespace Dynarmic::A32
47