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A32: Implement ASIMD VCVT (between floating-point and integer)

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This commit is contained in:
MerryMage 2020-06-21 14:03:39 +01:00
parent 43a4b2a0b8
commit 809dfe9c54
3 changed files with 24 additions and 1 deletions
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2
src/frontend/A32/decoder/asimd.inc
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@ -108,7 +108,7 @@ INST(asimd_VMOVN, "VMOVN", "111100111D11zz10dddd001
//INST(asimd_VCVT_half, "VCVT (half-precision)", "111100111-11--10----011x00-0----") // ASIMD
INST(asimd_VRECPE, "VRECPE", "111100111D11zz11dddd010F0QM0mmmm") // ASIMD
INST(asimd_VRSQRTE, "VRSQRTE", "111100111D11zz11dddd010F1QM0mmmm") // ASIMD
//INST(asimd_VCVT_integer, "VCVT (integer)", "111100111-11--11----011xxx-0----") // ASIMD
INST(asimd_VCVT_integer, "VCVT (integer)", "111100111D11zz11dddd011oUQM0mmmm") // ASIMD
// Miscellaneous
INST(asimd_VEXT, "VEXT", "111100101D11nnnnddddiiiiNQM0mmmm") // ASIMD

22
src/frontend/A32/translate/impl/asimd_two_regs_misc.cpp
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@ -558,4 +558,26 @@ bool ArmTranslatorVisitor::asimd_VRSQRTE(bool D, size_t sz, size_t Vd, bool F, b
return true;
}
bool ArmTranslatorVisitor::asimd_VCVT_integer(bool D, size_t sz, size_t Vd, bool op, bool U, bool Q, bool M, size_t Vm) {
if (Q && (Common::Bit<0>(Vd) || Common::Bit<0>(Vm))) {
return UndefinedInstruction();
}
if (sz != 0b10) {
return UndefinedInstruction();
}
const size_t esize = 8U << sz;
const auto d = ToVector(Q, Vd, D);
const auto m = ToVector(Q, Vm, M);
const auto reg_m = ir.GetVector(m);
const auto result = op ? (U ? ir.FPVectorToUnsignedFixed(esize, reg_m, 0, FP::RoundingMode::TowardsZero, false)
: ir.FPVectorToSignedFixed(esize, reg_m, 0, FP::RoundingMode::TowardsZero, false))
: (U ? ir.FPVectorFromUnsignedFixed(esize, reg_m, 0, FP::RoundingMode::ToNearest_TieEven, false)
: ir.FPVectorFromSignedFixed(esize, reg_m, 0, FP::RoundingMode::ToNearest_TieEven, false));
ir.SetVector(d, result);
return true;
}
} // namespace Dynarmic::A32

1
src/frontend/A32/translate/impl/translate_arm.h
View file

@ -533,6 +533,7 @@ struct ArmTranslatorVisitor final {
bool asimd_VMOVN(bool D, size_t sz, size_t Vd, bool M, size_t Vm);
bool asimd_VRECPE(bool D, size_t sz, size_t Vd, bool F, bool Q, bool M, size_t Vm);
bool asimd_VRSQRTE(bool D, size_t sz, size_t Vd, bool F, bool Q, bool M, size_t Vm);
bool asimd_VCVT_integer(bool D, size_t sz, size_t Vd, bool op, bool U, bool Q, bool M, size_t Vm);
// Advanced SIMD miscellaneous
bool asimd_VEXT(bool D, size_t Vn, size_t Vd, Imm<4> imm4, bool N, bool Q, bool M, size_t Vm);