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thumb32: Implement CLZ

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Also fleshes out the generator to allow for generating thumb32
instructions as well.
This commit is contained in:
Lioncash 2021-02-01 13:52:06 -05:00
parent 8c09da666a
commit 8d53048750
5 changed files with 127 additions and 27 deletions
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1
src/CMakeLists.txt
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@ -151,6 +151,7 @@ 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_misc.cpp
frontend/A32/translate/impl/translate_arm.h
frontend/A32/translate/impl/translate_thumb.h
frontend/A32/translate/impl/vfp.cpp

2
src/frontend/A32/decoder/thumb32.h
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@ -284,7 +284,7 @@ std::optional<std::reference_wrapper<const Thumb32Matcher<V>>> DecodeThumb32(u32
//INST(&V::thumb32_RBIT, "RBIT", "111110101001----1111----1010----"),
//INST(&V::thumb32_REVSH, "REVSH", "111110101001----1111----1011----"),
//INST(&V::thumb32_SEL, "SEL", "111110101010----1111----1000----"),
//INST(&V::thumb32_CLZ, "CLZ", "111110101011----1111----1000----"),
INST(&V::thumb32_CLZ, "CLZ", "111110101011nnnn1111dddd1000mmmm"),
// Multiply, Multiply Accumulate, and Absolute Difference
//INST(&V::thumb32_MUL, "MUL", "111110110000----1111----0000----"),

22
src/frontend/A32/translate/impl/thumb32_misc.cpp Normal file
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@ -0,0 +1,22 @@
/* This file is part of the dynarmic project.
* Copyright (c) 2016 MerryMage
* SPDX-License-Identifier: 0BSD
*/
#include "frontend/A32/translate/impl/translate_thumb.h"
namespace Dynarmic::A32 {
bool ThumbTranslatorVisitor::thumb32_CLZ(Reg n, Reg d, Reg m) {
if (m != n || d == Reg::PC || m == Reg::PC) {
return UnpredictableInstruction();
}
const auto reg_m = ir.GetRegister(m);
const auto result = ir.CountLeadingZeros(reg_m);
ir.SetRegister(d, result);
return true;
}
} // namespace Dynarmic::A32

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

@ -115,6 +115,9 @@ struct ThumbTranslatorVisitor final {
bool thumb32_BL_imm(Imm<11> hi, Imm<11> lo);
bool thumb32_BLX_imm(Imm<11> hi, Imm<11> lo);
bool thumb32_UDF();
// thumb32 miscellaneous instructions
bool thumb32_CLZ(Reg n, Reg d, Reg m);
};
} // namespace Dynarmic::A32