mirrors/dynarmic
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

thumb32: Implement SMULL

Browse source
This commit is contained in:
Lioncash 2021-02-07 17:16:05 -05:00
parent b58cd3a996
commit 6cf47e0ce0
4 changed files with 35 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
src/CMakeLists.txt
View file

@ -152,6 +152,7 @@ if ("A32" IN_LIST DYNARMIC_FRONTENDS)
frontend/A32/translate/impl/synchronization.cpp
frontend/A32/translate/impl/thumb16.cpp
frontend/A32/translate/impl/thumb32.cpp
frontend/A32/translate/impl/thumb32_long_multiply.cpp
frontend/A32/translate/impl/thumb32_misc.cpp
frontend/A32/translate/impl/thumb32_multiply.cpp
frontend/A32/translate/impl/thumb32_parallel.cpp

2
src/frontend/A32/decoder/thumb32.inc
View file

@ -279,7 +279,7 @@ INST(thumb32_USAD8, "USAD8", "111110110111nnnn1111dd
INST(thumb32_USADA8, "USADA8", "111110110111nnnnaaaadddd0000mmmm")
// Long Multiply, Long Multiply Accumulate, and Divide
//INST(thumb32_SMULL, "SMULL", "111110111000------------0000----")
INST(thumb32_SMULL, "SMULL", "111110111000nnnnllllhhhh0000mmmm")
//INST(thumb32_SDIV, "SDIV", "111110111001------------1111----")
//INST(thumb32_UMULL, "UMULL", "111110111010------------0000----")
//INST(thumb32_UDIV, "UDIV", "111110111011------------1111----")

30
src/frontend/A32/translate/impl/thumb32_long_multiply.cpp Normal file
View file

@ -0,0 +1,30 @@
/* This file is part of the dynarmic project.
* Copyright (c) 2021 MerryMage
* SPDX-License-Identifier: 0BSD
*/
#include "frontend/A32/translate/impl/translate_thumb.h"
namespace Dynarmic::A32 {
bool ThumbTranslatorVisitor::thumb32_SMULL(Reg n, Reg dLo, Reg dHi, Reg m) {
if (dLo == Reg::PC || dHi == Reg::PC || n == Reg::PC || m == Reg::PC) {
return UnpredictableInstruction();
}
if (dHi == dLo) {
return UnpredictableInstruction();
}
const auto n64 = ir.SignExtendWordToLong(ir.GetRegister(n));
const auto m64 = ir.SignExtendWordToLong(ir.GetRegister(m));
const auto result = ir.Mul(n64, m64);
const auto lo = ir.LeastSignificantWord(result);
const auto hi = ir.MostSignificantWord(result).result;
ir.SetRegister(dLo, lo);
ir.SetRegister(dHi, hi);
return true;
}
} // namespace Dynarmic::A32

3
src/frontend/A32/translate/impl/translate_thumb.h
View file

@ -116,6 +116,9 @@ struct ThumbTranslatorVisitor final {
bool thumb32_BLX_imm(Imm<11> hi, Imm<11> lo);
bool thumb32_UDF();
// thumb32 long multiply, long multiply accumulate, and divide instructions
bool thumb32_SMULL(Reg n, Reg dLo, Reg dHi, Reg m);
// thumb32 miscellaneous instructions
bool thumb32_CLZ(Reg n, Reg d, Reg m);
bool thumb32_QADD(Reg n, Reg d, Reg m);