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A32: Implement VDUP (scalar)

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This commit is contained in:
MerryMage 2020-06-21 00:22:33 +01:00
parent a8efe3f0f5
commit 239ee289cf
3 changed files with 25 additions and 2 deletions
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2
src/frontend/A32/decoder/asimd.inc
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@ -113,7 +113,7 @@ INST(asimd_VRSQRTE, "VRSQRTE", "111100111D11zz11dddd010
INST(asimd_VEXT, "VEXT", "111100101D11nnnnddddiiiiNQM0mmmm") // ASIMD
INST(asimd_VTBL, "VTBL", "111100111D11nnnndddd10zzN0M0mmmm") // ASIMD
INST(asimd_VTBX, "VTBX", "111100111D11nnnndddd10zzN1M0mmmm") // ASIMD
//INST(asimd_VDUP_scalar, "VDUP (scalar)", "111100111D11iiiidddd11000QM0mmmm") // ASIMD
INST(asimd_VDUP_scalar, "VDUP (scalar)", "111100111D11iiiidddd11000QM0mmmm") // ASIMD
// One register and modified immediate
INST(asimd_VMOV_imm, "VBIC, VMOV, VMVN, VORR (immediate)", "1111001a1D000bcdVVVVmmmm0Qo1efgh") // ASIMD

23
src/frontend/A32/translate/impl/asimd_misc.cpp
View file

@ -65,4 +65,27 @@ bool ArmTranslatorVisitor::asimd_VTBX(bool D, size_t Vn, size_t Vd, size_t len,
return TableLookup(*this, false, D, Vn, Vd, len, N, M, Vm);
}
bool ArmTranslatorVisitor::asimd_VDUP_scalar(bool D, Imm<4> imm4, size_t Vd, bool Q, bool M, size_t Vm) {
if (Q && Common::Bit<0>(Vd)) {
return UndefinedInstruction();
}
if (imm4.Bits<0, 2>() == 0b000) {
return UndefinedInstruction();
}
const size_t imm4_lsb = Common::LowestSetBit(imm4.ZeroExtend());
const size_t esize = 8u << imm4_lsb;
const size_t index = imm4.ZeroExtend() >> (imm4_lsb + 1);
const auto d = ToVector(Q, Vd, D);
const auto m = ToVector(false, Vm, M);
const auto reg_m = ir.GetVector(m);
const auto scalar = ir.VectorGetElement(esize, reg_m, index);
const auto result = ir.VectorBroadcast(esize, scalar);
ir.SetVector(d, result);
return true;
}
} // namespace Dynarmic::A32

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

@ -415,7 +415,6 @@ struct ArmTranslatorVisitor final {
bool vfp_VMOV_imm(Cond cond, bool D, Imm<4> imm4H, size_t Vd, bool sz, Imm<4> imm4L);
bool vfp_VMOV_reg(Cond cond, bool D, size_t Vd, bool sz, bool M, size_t Vm);
// Floating-point misc instructions
bool vfp_VABS(Cond cond, bool D, size_t Vd, bool sz, bool M, size_t Vm);
bool vfp_VNEG(Cond cond, bool D, size_t Vd, bool sz, bool M, size_t Vm);
@ -529,6 +528,7 @@ struct ArmTranslatorVisitor final {
bool asimd_VEXT(bool D, size_t Vn, size_t Vd, Imm<4> imm4, bool N, bool Q, bool M, size_t Vm);
bool asimd_VTBL(bool D, size_t Vn, size_t Vd, size_t len, bool N, bool M, size_t Vm);
bool asimd_VTBX(bool D, size_t Vn, size_t Vd, size_t len, bool N, bool M, size_t Vm);
bool asimd_VDUP_scalar(bool D, Imm<4> imm4, size_t Vd, bool Q, bool M, size_t Vm);
// Advanced SIMD load/store structures
bool v8_VST_multiple(bool D, Reg n, size_t Vd, Imm<4> type, size_t sz, size_t align, Reg m);