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A32: Implement ASIMD VSRI

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This commit is contained in:
Lioncash 2020-06-18 11:28:12 -04:00
parent 8b98c91ecc
commit 887732d8a8
3 changed files with 29 additions and 1 deletions
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2
src/frontend/A32/decoder/asimd.inc
View file

@ -62,7 +62,7 @@ INST(asimd_SHR, "SHR", "1111001U1Diiiiiidddd000
INST(asimd_SRA, "SRA", "1111001U1Diiiiiidddd0001LQM1mmmm") // ASIMD
INST(asimd_VRSHR, "VRSHR", "1111001U1Diiiiiidddd0010LQM1mmmm") // ASIMD
INST(asimd_VRSRA, "VRSRA", "1111001U1Diiiiiidddd0011LQM1mmmm") // ASIMD
//INST(asimd_VSRI, "VSRI", "111100111-vvv-------0100LB-1----") // ASIMD
INST(asimd_VSRI, "VSRI", "111100111Diiiiiidddd0100LQM1mmmm") // ASIMD
INST(asimd_VSHL, "VSHL", "111100101Diiiiiidddd0101LQM1mmmm") // ASIMD
//INST(asimd_VSLI, "VSLI", "111100111-vvv-------0101LB-1----") // ASIMD
//INST(asimd_VQSHL, "VQSHL" , "1111001U1-vvv-------011xLB-1----") // ASIMD

27
src/frontend/A32/translate/impl/asimd_two_regs_shift.cpp
View file

@ -99,6 +99,33 @@ bool ArmTranslatorVisitor::asimd_VRSRA(bool U, bool D, size_t imm6, size_t Vd, b
Accumulating::Accumulate, Rounding::Round);
}
bool ArmTranslatorVisitor::asimd_VSRI(bool D, size_t imm6, size_t Vd, bool L, bool Q, bool M, size_t Vm) {
if (Q && (Common::Bit<0>(Vd) || Common::Bit<0>(Vm))) {
return UndefinedInstruction();
}
// Technically just a related encoding (One register and modified immediate instructions)
if (!L && Common::Bits<3, 5>(imm6) == 0) {
return UndefinedInstruction();
}
const auto [esize, shift_amount] = ElementSizeAndShiftAmount(true, L, imm6);
const u64 mask = shift_amount == esize ? 0 : Common::Ones<u64>(esize) >> shift_amount;
const auto d = ToVector(Q, Vd, D);
const auto m = ToVector(Q, Vm, M);
const auto reg_m = ir.GetVector(m);
const auto reg_d = ir.GetVector(d);
const auto shifted = ir.VectorLogicalShiftRight(esize, reg_m, static_cast<u8>(shift_amount));
const auto mask_vec = ir.VectorBroadcast(esize, I(esize, mask));
const auto result = ir.VectorOr(ir.VectorAnd(reg_d, ir.VectorNot(mask_vec)), shifted);
ir.SetVector(d, result);
return true;
}
bool ArmTranslatorVisitor::asimd_VSHL(bool D, size_t imm6, size_t Vd, bool L, bool Q, bool M, size_t Vm) {
if (Q && (Common::Bit<0>(Vd) || Common::Bit<0>(Vm))) {
return UndefinedInstruction();

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

@ -456,6 +456,7 @@ struct ArmTranslatorVisitor final {
bool asimd_SRA(bool U, bool D, size_t imm6, size_t Vd, bool L, bool Q, bool M, size_t Vm);
bool asimd_VRSHR(bool U, bool D, size_t imm6, size_t Vd, bool L, bool Q, bool M, size_t Vm);
bool asimd_VRSRA(bool U, bool D, size_t imm6, size_t Vd, bool L, bool Q, bool M, size_t Vm);
bool asimd_VSRI(bool D, size_t imm6, size_t Vd, bool L, bool Q, bool M, size_t Vm);
bool asimd_VSHL(bool D, size_t imm6, size_t Vd, bool L, bool Q, bool M, size_t Vm);
// Advanced SIMD two register, miscellaneous