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thumb32: Implement QSUB8/UQSUB8

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This commit is contained in:
Lioncash 2021-02-01 17:10:17 -05:00
parent 874ab6a7b6
commit aa49b0db89
4 changed files with 34 additions and 2 deletions
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4
src/frontend/A32/decoder/thumb32.h
View file

@ -246,7 +246,7 @@ std::optional<std::reference_wrapper<const Thumb32Matcher<V>>> DecodeThumb32(u32
INST(&V::thumb32_QSAX, "QSAX", "111110101110nnnn1111dddd0001mmmm"),
INST(&V::thumb32_QSUB16, "QSUB16", "111110101101nnnn1111dddd0001mmmm"),
INST(&V::thumb32_QADD8, "QADD8", "111110101000nnnn1111dddd0001mmmm"),
//INST(&V::thumb32_QSUB8, "QSUB8", "111110101100----1111----0001----"),
INST(&V::thumb32_QSUB8, "QSUB8", "111110101100nnnn1111dddd0001mmmm"),
//INST(&V::thumb32_SHADD16, "SHADD16", "111110101001----1111----0010----"),
//INST(&V::thumb32_SHASX, "SHASX", "111110101010----1111----0010----"),
//INST(&V::thumb32_SHSAX, "SHSAX", "111110101110----1111----0010----"),
@ -266,7 +266,7 @@ std::optional<std::reference_wrapper<const Thumb32Matcher<V>>> DecodeThumb32(u32
INST(&V::thumb32_UQSAX, "UQSAX", "111110101110nnnn1111dddd0101mmmm"),
INST(&V::thumb32_UQSUB16, "UQSUB16", "111110101101nnnn1111dddd0101mmmm"),
INST(&V::thumb32_UQADD8, "UQADD8", "111110101000nnnn1111dddd0101mmmm"),
//INST(&V::thumb32_UQSUB8, "UQSUB8", "111110101100----1111----0101----"),
INST(&V::thumb32_UQSUB8, "UQSUB8", "111110101100nnnn1111dddd0101mmmm"),
//INST(&V::thumb32_UHADD16, "UHADD16", "111110101001----1111----0110----"),
//INST(&V::thumb32_UHASX, "UHASX", "111110101010----1111----0110----"),
//INST(&V::thumb32_UHSAX, "UHSAX", "111110101110----1111----0110----"),

26
src/frontend/A32/translate/impl/thumb32_parallel.cpp
View file

@ -246,6 +246,19 @@ bool ThumbTranslatorVisitor::thumb32_QSAX(Reg n, Reg d, Reg m) {
return true;
}
bool ThumbTranslatorVisitor::thumb32_QSUB8(Reg n, Reg d, Reg m) {
if (d == Reg::PC || n == Reg::PC || m == Reg::PC) {
return UnpredictableInstruction();
}
const auto reg_m = ir.GetRegister(m);
const auto reg_n = ir.GetRegister(n);
const auto result = ir.PackedSaturatedSubS8(reg_n, reg_m);
ir.SetRegister(d, result);
return true;
}
bool ThumbTranslatorVisitor::thumb32_QSUB16(Reg n, Reg d, Reg m) {
if (d == Reg::PC || n == Reg::PC || m == Reg::PC) {
return UnpredictableInstruction();
@ -323,6 +336,19 @@ bool ThumbTranslatorVisitor::thumb32_UQSAX(Reg n, Reg d, Reg m) {
return true;
}
bool ThumbTranslatorVisitor::thumb32_UQSUB8(Reg n, Reg d, Reg m) {
if (d == Reg::PC || n == Reg::PC || m == Reg::PC) {
return UnpredictableInstruction();
}
const auto reg_m = ir.GetRegister(m);
const auto reg_n = ir.GetRegister(n);
const auto result = ir.PackedSaturatedSubU8(reg_n, reg_m);
ir.SetRegister(d, result);
return true;
}
bool ThumbTranslatorVisitor::thumb32_UQSUB16(Reg n, Reg d, Reg m) {
if (d == Reg::PC || n == Reg::PC || m == Reg::PC) {
return UnpredictableInstruction();

2
src/frontend/A32/translate/impl/translate_thumb.h
View file

@ -146,11 +146,13 @@ struct ThumbTranslatorVisitor final {
bool thumb32_QADD16(Reg n, Reg d, Reg m);
bool thumb32_QASX(Reg n, Reg d, Reg m);
bool thumb32_QSAX(Reg n, Reg d, Reg m);
bool thumb32_QSUB8(Reg n, Reg d, Reg m);
bool thumb32_QSUB16(Reg n, Reg d, Reg m);
bool thumb32_UQADD8(Reg n, Reg d, Reg m);
bool thumb32_UQADD16(Reg n, Reg d, Reg m);
bool thumb32_UQASX(Reg n, Reg d, Reg m);
bool thumb32_UQSAX(Reg n, Reg d, Reg m);
bool thumb32_UQSUB8(Reg n, Reg d, Reg m);
bool thumb32_UQSUB16(Reg n, Reg d, Reg m);
};

4
tests/A32/fuzz_thumb.cpp
View file

@ -392,6 +392,8 @@ TEST_CASE("Fuzz Thumb32 instructions set", "[JitX64][Thumb][Thumb32]") {
three_reg_not_r15),
ThumbInstGen("111110101000nnnn1111dddd1010mmmm", // QSUB
three_reg_not_r15),
ThumbInstGen("111110101100nnnn1111dddd0001mmmm", // QSUB8
three_reg_not_r15),
ThumbInstGen("111110101101nnnn1111dddd0001mmmm", // QSUB16
three_reg_not_r15),
ThumbInstGen("111110101001nnnn1111dddd1010mmmm", // RBIT
@ -450,6 +452,8 @@ TEST_CASE("Fuzz Thumb32 instructions set", "[JitX64][Thumb][Thumb32]") {
three_reg_not_r15),
ThumbInstGen("111110101110nnnn1111dddd0101mmmm", // UQSAX
three_reg_not_r15),
ThumbInstGen("111110101100nnnn1111dddd0101mmmm", // UQSUB8
three_reg_not_r15),
ThumbInstGen("111110101101nnnn1111dddd0101mmmm", // UQSUB16
three_reg_not_r15),
ThumbInstGen("111110101110nnnn1111dddd0100mmmm", // USAX