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A64: Implement REV, REV32, and REV16 (#126)

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This commit is contained in:
Thomas Guillemard 2018-01-21 13:17:47 +01:00 • committed by MerryMage
parent 5eb0bdecdf
commit 896cf44f96
5 changed files with 125 additions and 4 deletions
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1
src/CMakeLists.txt
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@ -65,6 +65,7 @@ add_library(dynarmic
frontend/A64/translate/impl/data_processing_conditional_select.cpp
frontend/A64/translate/impl/data_processing_logical.cpp
frontend/A64/translate/impl/data_processing_pcrel.cpp
frontend/A64/translate/impl/data_processing_register.cpp
frontend/A64/translate/impl/exception_generating.cpp
frontend/A64/translate/impl/impl.cpp
frontend/A64/translate/impl/impl.h

6
src/frontend/A64/decoder/a64.inc
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@ -286,11 +286,11 @@ INST(UnallocatedEncoding, "", "10111
// Data Processing - Register - 1 source
//INST(RBIT_int, "RBIT", "z101101011000000000000nnnnnddddd")
//INST(REV16_int, "REV16", "z101101011000000000001nnnnnddddd")
//INST(REV, "REV", "z10110101100000000001-nnnnnddddd")
INST(REV16_int, "REV16", "z101101011000000000001nnnnnddddd")
INST(REV, "REV", "z10110101100000000001onnnnnddddd")
//INST(CLZ_int, "CLZ", "z101101011000000000100nnnnnddddd")
//INST(CLS_int, "CLS", "z101101011000000000101nnnnnddddd")
//INST(REV32_int, "REV32", "1101101011000000000010nnnnnddddd")
INST(REV32_int, "REV32", "1101101011000000000010nnnnnddddd")
//INST(PACDA, "PACDA, PACDZA", "110110101100000100Z010nnnnnddddd")
//INST(PACDB, "PACDB, PACDZB", "110110101100000100Z011nnnnnddddd")
//INST(AUTDA, "AUTDA, AUTDZA", "110110101100000100Z110nnnnnddddd")

64
src/frontend/A64/translate/impl/data_processing_register.cpp Normal file
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@ -0,0 +1,64 @@
/* 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 {
bool TranslatorVisitor::REV(bool sf, bool opc_0, Reg Rn, Reg Rd)
{
if (!sf && opc_0) return UnallocatedEncoding();
size_t datasize = sf ? 64 : 32;
IR::U32U64 operand = X(datasize, Rn);
IR::U32U64 result;
if (sf) {
result = ir.ByteReverseDual(operand);
} else {
result = ir.ByteReverseWord(operand);
}
X(datasize, Rd, result);
return true;
}
bool TranslatorVisitor::REV32_int(Reg Rn, Reg Rd)
{
IR::U64 operand = ir.GetX(Rn);
IR::U32 lo = ir.ByteReverseWord(ir.LeastSignificantWord(operand));
IR::U32 hi = ir.ByteReverseWord(ir.MostSignificantWord(operand).result);
IR::U64 result = ir.Pack2x32To1x64(lo, hi);
X(64, Rd, result);
return true;
}
bool TranslatorVisitor::REV16_int(bool sf, Reg Rn, Reg Rd)
{
size_t datasize = sf ? 64 : 32;
IR::U32U64 operand = X(datasize, Rn);
IR::U32U64 result;
IR::U32U64 hihalf;
IR::U32U64 lohalf;
if (sf) {
hihalf = ir.And(ir.LogicalShiftRight(IR::U64(operand), ir.Imm8(8)), ir.Imm64(0x00FF00FF00FF00FF));
lohalf = ir.And(ir.LogicalShiftLeft(IR::U64(operand), ir.Imm8(8)), ir.Imm64(0xFF00FF00FF00FF00));
} else {
hihalf = ir.And(ir.LogicalShiftRight(operand, ir.Imm8(8), ir.Imm1(0)).result, ir.Imm32(0x00FF00FF));
lohalf = ir.And(ir.LogicalShiftLeft(operand, ir.Imm8(8), ir.Imm1(0)).result, ir.Imm32(0xFF00FF00));
}
result = ir.Or(hihalf, lohalf);
X(datasize, Rd, result);
return true;
}
} // namespace A64
} // namespace Dynarmic

2
src/frontend/A64/translate/impl/impl.h
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@ -335,7 +335,7 @@ struct TranslatorVisitor final {
// Data Processing - Register - 1 source
bool RBIT_int(bool sf, Reg Rn, Reg Rd);
bool REV16_int(bool sf, Reg Rn, Reg Rd);
bool REV(bool sf, Reg Rn, Reg Rd);
bool REV(bool sf, bool opc_0, Reg Rn, Reg Rd);
bool CLZ_int(bool sf, Reg Rn, Reg Rd);
bool CLS_int(bool sf, Reg Rn, Reg Rd);
bool REV32_int(Reg Rn, Reg Rd);