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-rw-r--r--contrib/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp424
1 files changed, 76 insertions, 348 deletions
diff --git a/contrib/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp b/contrib/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp
index 2a97cd632560..3c24bb30a26d 100644
--- a/contrib/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp
+++ b/contrib/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.cpp
@@ -18,7 +18,7 @@
using namespace llvm;
-StringRef NamedImmMapper::toString(uint32_t Value, bool &Valid) const {
+StringRef AArch64NamedImmMapper::toString(uint32_t Value, bool &Valid) const {
for (unsigned i = 0; i < NumPairs; ++i) {
if (Pairs[i].Value == Value) {
Valid = true;
@@ -30,7 +30,7 @@ StringRef NamedImmMapper::toString(uint32_t Value, bool &Valid) const {
return StringRef();
}
-uint32_t NamedImmMapper::fromString(StringRef Name, bool &Valid) const {
+uint32_t AArch64NamedImmMapper::fromString(StringRef Name, bool &Valid) const {
std::string LowerCaseName = Name.lower();
for (unsigned i = 0; i < NumPairs; ++i) {
if (Pairs[i].Name == LowerCaseName) {
@@ -43,11 +43,11 @@ uint32_t NamedImmMapper::fromString(StringRef Name, bool &Valid) const {
return -1;
}
-bool NamedImmMapper::validImm(uint32_t Value) const {
+bool AArch64NamedImmMapper::validImm(uint32_t Value) const {
return Value < TooBigImm;
}
-const NamedImmMapper::Mapping A64AT::ATMapper::ATPairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64AT::ATMapper::ATPairs[] = {
{"s1e1r", S1E1R},
{"s1e2r", S1E2R},
{"s1e3r", S1E3R},
@@ -62,10 +62,10 @@ const NamedImmMapper::Mapping A64AT::ATMapper::ATPairs[] = {
{"s12e0w", S12E0W},
};
-A64AT::ATMapper::ATMapper()
- : NamedImmMapper(ATPairs, 0) {}
+AArch64AT::ATMapper::ATMapper()
+ : AArch64NamedImmMapper(ATPairs, 0) {}
-const NamedImmMapper::Mapping A64DB::DBarrierMapper::DBarrierPairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64DB::DBarrierMapper::DBarrierPairs[] = {
{"oshld", OSHLD},
{"oshst", OSHST},
{"osh", OSH},
@@ -80,10 +80,10 @@ const NamedImmMapper::Mapping A64DB::DBarrierMapper::DBarrierPairs[] = {
{"sy", SY}
};
-A64DB::DBarrierMapper::DBarrierMapper()
- : NamedImmMapper(DBarrierPairs, 16u) {}
+AArch64DB::DBarrierMapper::DBarrierMapper()
+ : AArch64NamedImmMapper(DBarrierPairs, 16u) {}
-const NamedImmMapper::Mapping A64DC::DCMapper::DCPairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64DC::DCMapper::DCPairs[] = {
{"zva", ZVA},
{"ivac", IVAC},
{"isw", ISW},
@@ -94,26 +94,26 @@ const NamedImmMapper::Mapping A64DC::DCMapper::DCPairs[] = {
{"cisw", CISW}
};
-A64DC::DCMapper::DCMapper()
- : NamedImmMapper(DCPairs, 0) {}
+AArch64DC::DCMapper::DCMapper()
+ : AArch64NamedImmMapper(DCPairs, 0) {}
-const NamedImmMapper::Mapping A64IC::ICMapper::ICPairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64IC::ICMapper::ICPairs[] = {
{"ialluis", IALLUIS},
{"iallu", IALLU},
{"ivau", IVAU}
};
-A64IC::ICMapper::ICMapper()
- : NamedImmMapper(ICPairs, 0) {}
+AArch64IC::ICMapper::ICMapper()
+ : AArch64NamedImmMapper(ICPairs, 0) {}
-const NamedImmMapper::Mapping A64ISB::ISBMapper::ISBPairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64ISB::ISBMapper::ISBPairs[] = {
{"sy", SY},
};
-A64ISB::ISBMapper::ISBMapper()
- : NamedImmMapper(ISBPairs, 16) {}
+AArch64ISB::ISBMapper::ISBMapper()
+ : AArch64NamedImmMapper(ISBPairs, 16) {}
-const NamedImmMapper::Mapping A64PRFM::PRFMMapper::PRFMPairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64PRFM::PRFMMapper::PRFMPairs[] = {
{"pldl1keep", PLDL1KEEP},
{"pldl1strm", PLDL1STRM},
{"pldl2keep", PLDL2KEEP},
@@ -134,19 +134,19 @@ const NamedImmMapper::Mapping A64PRFM::PRFMMapper::PRFMPairs[] = {
{"pstl3strm", PSTL3STRM}
};
-A64PRFM::PRFMMapper::PRFMMapper()
- : NamedImmMapper(PRFMPairs, 32) {}
+AArch64PRFM::PRFMMapper::PRFMMapper()
+ : AArch64NamedImmMapper(PRFMPairs, 32) {}
-const NamedImmMapper::Mapping A64PState::PStateMapper::PStatePairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64PState::PStateMapper::PStatePairs[] = {
{"spsel", SPSel},
{"daifset", DAIFSet},
{"daifclr", DAIFClr}
};
-A64PState::PStateMapper::PStateMapper()
- : NamedImmMapper(PStatePairs, 0) {}
+AArch64PState::PStateMapper::PStateMapper()
+ : AArch64NamedImmMapper(PStatePairs, 0) {}
-const NamedImmMapper::Mapping A64SysReg::MRSMapper::MRSPairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64SysReg::MRSMapper::MRSPairs[] = {
{"mdccsr_el0", MDCCSR_EL0},
{"dbgdtrrx_el0", DBGDTRRX_EL0},
{"mdrar_el1", MDRAR_EL1},
@@ -176,16 +176,16 @@ const NamedImmMapper::Mapping A64SysReg::MRSMapper::MRSPairs[] = {
{"id_isar3_el1", ID_ISAR3_EL1},
{"id_isar4_el1", ID_ISAR4_EL1},
{"id_isar5_el1", ID_ISAR5_EL1},
- {"id_aa64pfr0_el1", ID_AA64PFR0_EL1},
- {"id_aa64pfr1_el1", ID_AA64PFR1_EL1},
- {"id_aa64dfr0_el1", ID_AA64DFR0_EL1},
- {"id_aa64dfr1_el1", ID_AA64DFR1_EL1},
- {"id_aa64afr0_el1", ID_AA64AFR0_EL1},
- {"id_aa64afr1_el1", ID_AA64AFR1_EL1},
- {"id_aa64isar0_el1", ID_AA64ISAR0_EL1},
- {"id_aa64isar1_el1", ID_AA64ISAR1_EL1},
- {"id_aa64mmfr0_el1", ID_AA64MMFR0_EL1},
- {"id_aa64mmfr1_el1", ID_AA64MMFR1_EL1},
+ {"id_aa64pfr0_el1", ID_A64PFR0_EL1},
+ {"id_aa64pfr1_el1", ID_A64PFR1_EL1},
+ {"id_aa64dfr0_el1", ID_A64DFR0_EL1},
+ {"id_aa64dfr1_el1", ID_A64DFR1_EL1},
+ {"id_aa64afr0_el1", ID_A64AFR0_EL1},
+ {"id_aa64afr1_el1", ID_A64AFR1_EL1},
+ {"id_aa64isar0_el1", ID_A64ISAR0_EL1},
+ {"id_aa64isar1_el1", ID_A64ISAR1_EL1},
+ {"id_aa64mmfr0_el1", ID_A64MMFR0_EL1},
+ {"id_aa64mmfr1_el1", ID_A64MMFR1_EL1},
{"mvfr0_el1", MVFR0_EL1},
{"mvfr1_el1", MVFR1_EL1},
{"mvfr2_el1", MVFR2_EL1},
@@ -245,12 +245,13 @@ const NamedImmMapper::Mapping A64SysReg::MRSMapper::MRSPairs[] = {
{"ich_elsr_el2", ICH_ELSR_EL2}
};
-A64SysReg::MRSMapper::MRSMapper() {
+AArch64SysReg::MRSMapper::MRSMapper(uint64_t FeatureBits)
+ : SysRegMapper(FeatureBits) {
InstPairs = &MRSPairs[0];
NumInstPairs = llvm::array_lengthof(MRSPairs);
}
-const NamedImmMapper::Mapping A64SysReg::MSRMapper::MSRPairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64SysReg::MSRMapper::MSRPairs[] = {
{"dbgdtrtx_el0", DBGDTRTX_EL0},
{"oslar_el1", OSLAR_EL1},
{"pmswinc_el0", PMSWINC_EL0},
@@ -268,13 +269,14 @@ const NamedImmMapper::Mapping A64SysReg::MSRMapper::MSRPairs[] = {
{"icc_sgi0r_el1", ICC_SGI0R_EL1}
};
-A64SysReg::MSRMapper::MSRMapper() {
+AArch64SysReg::MSRMapper::MSRMapper(uint64_t FeatureBits)
+ : SysRegMapper(FeatureBits) {
InstPairs = &MSRPairs[0];
NumInstPairs = llvm::array_lengthof(MSRPairs);
}
-const NamedImmMapper::Mapping A64SysReg::SysRegMapper::SysRegPairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64SysReg::SysRegMapper::SysRegPairs[] = {
{"osdtrrx_el1", OSDTRRX_EL1},
{"osdtrtx_el1", OSDTRTX_EL1},
{"teecr32_el1", TEECR32_EL1},
@@ -753,10 +755,16 @@ const NamedImmMapper::Mapping A64SysReg::SysRegMapper::SysRegPairs[] = {
{"ich_lr15_el2", ICH_LR15_EL2}
};
+const AArch64NamedImmMapper::Mapping
+AArch64SysReg::SysRegMapper::CycloneSysRegPairs[] = {
+ {"cpm_ioacc_ctl_el3", CPM_IOACC_CTL_EL3}
+};
+
uint32_t
-A64SysReg::SysRegMapper::fromString(StringRef Name, bool &Valid) const {
- // First search the registers shared by all
+AArch64SysReg::SysRegMapper::fromString(StringRef Name, bool &Valid) const {
std::string NameLower = Name.lower();
+
+ // First search the registers shared by all
for (unsigned i = 0; i < array_lengthof(SysRegPairs); ++i) {
if (SysRegPairs[i].Name == NameLower) {
Valid = true;
@@ -764,6 +772,16 @@ A64SysReg::SysRegMapper::fromString(StringRef Name, bool &Valid) const {
}
}
+ // Next search for target specific registers
+ if (FeatureBits & AArch64::ProcCyclone) {
+ for (unsigned i = 0; i < array_lengthof(CycloneSysRegPairs); ++i) {
+ if (CycloneSysRegPairs[i].Name == NameLower) {
+ Valid = true;
+ return CycloneSysRegPairs[i].Value;
+ }
+ }
+ }
+
// Now try the instruction-specific registers (either read-only or
// write-only).
for (unsigned i = 0; i < NumInstPairs; ++i) {
@@ -796,7 +814,8 @@ A64SysReg::SysRegMapper::fromString(StringRef Name, bool &Valid) const {
}
std::string
-A64SysReg::SysRegMapper::toString(uint32_t Bits, bool &Valid) const {
+AArch64SysReg::SysRegMapper::toString(uint32_t Bits, bool &Valid) const {
+ // First search the registers shared by all
for (unsigned i = 0; i < array_lengthof(SysRegPairs); ++i) {
if (SysRegPairs[i].Value == Bits) {
Valid = true;
@@ -804,6 +823,18 @@ A64SysReg::SysRegMapper::toString(uint32_t Bits, bool &Valid) const {
}
}
+ // Next search for target specific registers
+ if (FeatureBits & AArch64::ProcCyclone) {
+ for (unsigned i = 0; i < array_lengthof(CycloneSysRegPairs); ++i) {
+ if (CycloneSysRegPairs[i].Value == Bits) {
+ Valid = true;
+ return CycloneSysRegPairs[i].Name;
+ }
+ }
+ }
+
+ // Now try the instruction-specific registers (either read-only or
+ // write-only).
for (unsigned i = 0; i < NumInstPairs; ++i) {
if (InstPairs[i].Value == Bits) {
Valid = true;
@@ -831,7 +862,7 @@ A64SysReg::SysRegMapper::toString(uint32_t Bits, bool &Valid) const {
+ "_c" + utostr(CRm) + "_" + utostr(Op2);
}
-const NamedImmMapper::Mapping A64TLBI::TLBIMapper::TLBIPairs[] = {
+const AArch64NamedImmMapper::Mapping AArch64TLBI::TLBIMapper::TLBIPairs[] = {
{"ipas2e1is", IPAS2E1IS},
{"ipas2le1is", IPAS2LE1IS},
{"vmalle1is", VMALLE1IS},
@@ -866,308 +897,5 @@ const NamedImmMapper::Mapping A64TLBI::TLBIMapper::TLBIPairs[] = {
{"vaale1", VAALE1}
};
-A64TLBI::TLBIMapper::TLBIMapper()
- : NamedImmMapper(TLBIPairs, 0) {}
-
-bool A64Imms::isFPImm(const APFloat &Val, uint32_t &Imm8Bits) {
- const fltSemantics &Sem = Val.getSemantics();
- unsigned FracBits = APFloat::semanticsPrecision(Sem) - 1;
-
- uint32_t ExpMask;
- switch (FracBits) {
- case 10: // IEEE half-precision
- ExpMask = 0x1f;
- break;
- case 23: // IEEE single-precision
- ExpMask = 0xff;
- break;
- case 52: // IEEE double-precision
- ExpMask = 0x7ff;
- break;
- case 112: // IEEE quad-precision
- // No immediates are valid for double precision.
- return false;
- default:
- llvm_unreachable("Only half, single and double precision supported");
- }
-
- uint32_t ExpStart = FracBits;
- uint64_t FracMask = (1ULL << FracBits) - 1;
-
- uint32_t Sign = Val.isNegative();
-
- uint64_t Bits= Val.bitcastToAPInt().getLimitedValue();
- uint64_t Fraction = Bits & FracMask;
- int32_t Exponent = ((Bits >> ExpStart) & ExpMask);
- Exponent -= ExpMask >> 1;
-
- // S[d] = imm8<7>:NOT(imm8<6>):Replicate(imm8<6>, 5):imm8<5:0>:Zeros(19)
- // D[d] = imm8<7>:NOT(imm8<6>):Replicate(imm8<6>, 8):imm8<5:0>:Zeros(48)
- // This translates to: only 4 bits of fraction; -3 <= exp <= 4.
- uint64_t A64FracStart = FracBits - 4;
- uint64_t A64FracMask = 0xf;
-
- // Are there too many fraction bits?
- if (Fraction & ~(A64FracMask << A64FracStart))
- return false;
-
- if (Exponent < -3 || Exponent > 4)
- return false;
-
- uint32_t PackedFraction = (Fraction >> A64FracStart) & A64FracMask;
- uint32_t PackedExp = (Exponent + 7) & 0x7;
-
- Imm8Bits = (Sign << 7) | (PackedExp << 4) | PackedFraction;
- return true;
-}
-
-// Encoding of the immediate for logical (immediate) instructions:
-//
-// | N | imms | immr | size | R | S |
-// |---+--------+--------+------+--------------+--------------|
-// | 1 | ssssss | rrrrrr | 64 | UInt(rrrrrr) | UInt(ssssss) |
-// | 0 | 0sssss | xrrrrr | 32 | UInt(rrrrr) | UInt(sssss) |
-// | 0 | 10ssss | xxrrrr | 16 | UInt(rrrr) | UInt(ssss) |
-// | 0 | 110sss | xxxrrr | 8 | UInt(rrr) | UInt(sss) |
-// | 0 | 1110ss | xxxxrr | 4 | UInt(rr) | UInt(ss) |
-// | 0 | 11110s | xxxxxr | 2 | UInt(r) | UInt(s) |
-// | 0 | 11111x | - | | UNALLOCATED | |
-//
-// Columns 'R', 'S' and 'size' specify a "bitmask immediate" of size bits in
-// which the lower S+1 bits are ones and the remaining bits are zero, then
-// rotated right by R bits, which is then replicated across the datapath.
-//
-// + Values of 'N', 'imms' and 'immr' which do not match the above table are
-// RESERVED.
-// + If all 's' bits in the imms field are set then the instruction is
-// RESERVED.
-// + The 'x' bits in the 'immr' field are IGNORED.
-
-bool A64Imms::isLogicalImm(unsigned RegWidth, uint64_t Imm, uint32_t &Bits) {
- int RepeatWidth;
- int Rotation = 0;
- int Num1s = 0;
-
- // Because there are S+1 ones in the replicated mask, an immediate of all
- // zeros is not allowed. Filtering it here is probably more efficient.
- if (Imm == 0) return false;
-
- for (RepeatWidth = RegWidth; RepeatWidth > 1; RepeatWidth /= 2) {
- uint64_t RepeatMask = RepeatWidth == 64 ? -1 : (1ULL << RepeatWidth) - 1;
- uint64_t ReplicatedMask = Imm & RepeatMask;
-
- if (ReplicatedMask == 0) continue;
-
- // First we have to make sure the mask is actually repeated in each slot for
- // this width-specifier.
- bool IsReplicatedMask = true;
- for (unsigned i = RepeatWidth; i < RegWidth; i += RepeatWidth) {
- if (((Imm >> i) & RepeatMask) != ReplicatedMask) {
- IsReplicatedMask = false;
- break;
- }
- }
- if (!IsReplicatedMask) continue;
-
- // Now we have to work out the amount of rotation needed. The first part of
- // this calculation is actually independent of RepeatWidth, but the complex
- // case will depend on it.
- Rotation = countTrailingZeros(Imm);
- if (Rotation == 0) {
- // There were no leading zeros, which means it's either in place or there
- // are 1s at each end (e.g. 0x8003 needs rotating).
- Rotation = RegWidth == 64 ? CountLeadingOnes_64(Imm)
- : CountLeadingOnes_32(Imm);
- Rotation = RepeatWidth - Rotation;
- }
-
- uint64_t ReplicatedOnes = ReplicatedMask;
- if (Rotation != 0 && Rotation != 64)
- ReplicatedOnes = (ReplicatedMask >> Rotation)
- | ((ReplicatedMask << (RepeatWidth - Rotation)) & RepeatMask);
-
- // Of course, they may not actually be ones, so we have to check that:
- if (!isMask_64(ReplicatedOnes))
- continue;
-
- Num1s = CountTrailingOnes_64(ReplicatedOnes);
-
- // We know we've got an almost valid encoding (certainly, if this is invalid
- // no other parameters would work).
- break;
- }
-
- // The encodings which would produce all 1s are RESERVED.
- if (RepeatWidth == 1 || Num1s == RepeatWidth) return false;
-
- uint32_t N = RepeatWidth == 64;
- uint32_t ImmR = RepeatWidth - Rotation;
- uint32_t ImmS = Num1s - 1;
-
- switch (RepeatWidth) {
- default: break; // No action required for other valid rotations.
- case 16: ImmS |= 0x20; break; // 10ssss
- case 8: ImmS |= 0x30; break; // 110sss
- case 4: ImmS |= 0x38; break; // 1110ss
- case 2: ImmS |= 0x3c; break; // 11110s
- }
-
- Bits = ImmS | (ImmR << 6) | (N << 12);
-
- return true;
-}
-
-
-bool A64Imms::isLogicalImmBits(unsigned RegWidth, uint32_t Bits,
- uint64_t &Imm) {
- uint32_t N = Bits >> 12;
- uint32_t ImmR = (Bits >> 6) & 0x3f;
- uint32_t ImmS = Bits & 0x3f;
-
- // N=1 encodes a 64-bit replication and is invalid for the 32-bit
- // instructions.
- if (RegWidth == 32 && N != 0) return false;
-
- int Width = 0;
- if (N == 1)
- Width = 64;
- else if ((ImmS & 0x20) == 0)
- Width = 32;
- else if ((ImmS & 0x10) == 0)
- Width = 16;
- else if ((ImmS & 0x08) == 0)
- Width = 8;
- else if ((ImmS & 0x04) == 0)
- Width = 4;
- else if ((ImmS & 0x02) == 0)
- Width = 2;
- else {
- // ImmS is 0b11111x: UNALLOCATED
- return false;
- }
-
- int Num1s = (ImmS & (Width - 1)) + 1;
-
- // All encodings which would map to -1 (signed) are RESERVED.
- if (Num1s == Width) return false;
-
- int Rotation = (ImmR & (Width - 1));
- uint64_t Mask = (1ULL << Num1s) - 1;
- uint64_t WidthMask = Width == 64 ? -1 : (1ULL << Width) - 1;
- if (Rotation != 0 && Rotation != 64)
- Mask = (Mask >> Rotation)
- | ((Mask << (Width - Rotation)) & WidthMask);
-
- Imm = Mask;
- for (unsigned i = 1; i < RegWidth / Width; ++i) {
- Mask <<= Width;
- Imm |= Mask;
- }
-
- return true;
-}
-
-bool A64Imms::isMOVZImm(int RegWidth, uint64_t Value, int &UImm16, int &Shift) {
- // If high bits are set then a 32-bit MOVZ can't possibly work.
- if (RegWidth == 32 && (Value & ~0xffffffffULL))
- return false;
-
- for (int i = 0; i < RegWidth; i += 16) {
- // If the value is 0 when we mask out all the bits that could be set with
- // the current LSL value then it's representable.
- if ((Value & ~(0xffffULL << i)) == 0) {
- Shift = i / 16;
- UImm16 = (Value >> i) & 0xffff;
- return true;
- }
- }
- return false;
-}
-
-bool A64Imms::isMOVNImm(int RegWidth, uint64_t Value, int &UImm16, int &Shift) {
- // MOVN is defined to set its register to NOT(LSL(imm16, shift)).
-
- // We have to be a little careful about a 32-bit register: 0xffff_1234 *is*
- // representable, but ~0xffff_1234 == 0xffff_ffff_0000_edcb which is not
- // a valid input for isMOVZImm.
- if (RegWidth == 32 && (Value & ~0xffffffffULL))
- return false;
-
- uint64_t MOVZEquivalent = RegWidth == 32 ? ~Value & 0xffffffff : ~Value;
-
- return isMOVZImm(RegWidth, MOVZEquivalent, UImm16, Shift);
-}
-
-bool A64Imms::isOnlyMOVNImm(int RegWidth, uint64_t Value,
- int &UImm16, int &Shift) {
- if (isMOVZImm(RegWidth, Value, UImm16, Shift))
- return false;
-
- return isMOVNImm(RegWidth, Value, UImm16, Shift);
-}
-
-// decodeNeonModShiftImm - Decode a Neon OpCmode value into the
-// the shift amount and the shift type (shift zeros or ones in) and
-// returns whether the OpCmode value implies a shift operation.
-bool A64Imms::decodeNeonModShiftImm(unsigned OpCmode, unsigned &ShiftImm,
- unsigned &ShiftOnesIn) {
- ShiftImm = 0;
- ShiftOnesIn = false;
- bool HasShift = true;
-
- if (OpCmode == 0xe) {
- // movi byte
- HasShift = false;
- } else if (OpCmode == 0x1e) {
- // movi 64-bit bytemask
- HasShift = false;
- } else if ((OpCmode & 0xc) == 0x8) {
- // shift zeros, per halfword
- ShiftImm = ((OpCmode & 0x2) >> 1);
- } else if ((OpCmode & 0x8) == 0) {
- // shift zeros, per word
- ShiftImm = ((OpCmode & 0x6) >> 1);
- } else if ((OpCmode & 0xe) == 0xc) {
- // shift ones, per word
- ShiftOnesIn = true;
- ShiftImm = (OpCmode & 0x1);
- } else {
- // per byte, per bytemask
- llvm_unreachable("Unsupported Neon modified immediate");
- }
-
- return HasShift;
-}
-
-// decodeNeonModImm - Decode a NEON modified immediate and OpCmode values
-// into the element value and the element size in bits.
-uint64_t A64Imms::decodeNeonModImm(unsigned Val, unsigned OpCmode,
- unsigned &EltBits) {
- uint64_t DecodedVal = Val;
- EltBits = 0;
-
- if (OpCmode == 0xe) {
- // movi byte
- EltBits = 8;
- } else if (OpCmode == 0x1e) {
- // movi 64-bit bytemask
- DecodedVal = 0;
- for (unsigned ByteNum = 0; ByteNum < 8; ++ByteNum) {
- if ((Val >> ByteNum) & 1)
- DecodedVal |= (uint64_t)0xff << (8 * ByteNum);
- }
- EltBits = 64;
- } else if ((OpCmode & 0xc) == 0x8) {
- // shift zeros, per halfword
- EltBits = 16;
- } else if ((OpCmode & 0x8) == 0) {
- // shift zeros, per word
- EltBits = 32;
- } else if ((OpCmode & 0xe) == 0xc) {
- // shift ones, per word
- EltBits = 32;
- } else {
- llvm_unreachable("Unsupported Neon modified immediate");
- }
- return DecodedVal;
-}
+AArch64TLBI::TLBIMapper::TLBIMapper()
+ : AArch64NamedImmMapper(TLBIPairs, 0) {}
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-07 02:02:16 +0000