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llvm-project/llvm/lib/Target/AArch64/MCTargetDesc/AArch64AddressingModes.h

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//===- AArch64AddressingModes.h - AArch64 Addressing Modes ------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the AArch64 addressing mode implementation stuff.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_AARCH64_MCTARGETDESC_AARCH64ADDRESSINGMODES_H
#define LLVM_LIB_TARGET_AARCH64_MCTARGETDESC_AARCH64ADDRESSINGMODES_H
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include <cassert>
namespace llvm {
/// AArch64_AM - AArch64 Addressing Mode Stuff
namespace AArch64_AM {
//===----------------------------------------------------------------------===//
// Shifts
//
enum ShiftExtendType {
InvalidShiftExtend = -1,
LSL = 0,
LSR,
ASR,
ROR,
MSL,
UXTB,
UXTH,
UXTW,
UXTX,
SXTB,
SXTH,
SXTW,
SXTX,
};
/// getShiftName - Get the string encoding for the shift type.
static inline const char *getShiftExtendName(AArch64_AM::ShiftExtendType ST) {
switch (ST) {
default: llvm_unreachable("unhandled shift type!");
case AArch64_AM::LSL: return "lsl";
case AArch64_AM::LSR: return "lsr";
case AArch64_AM::ASR: return "asr";
case AArch64_AM::ROR: return "ror";
case AArch64_AM::MSL: return "msl";
case AArch64_AM::UXTB: return "uxtb";
case AArch64_AM::UXTH: return "uxth";
case AArch64_AM::UXTW: return "uxtw";
case AArch64_AM::UXTX: return "uxtx";
case AArch64_AM::SXTB: return "sxtb";
case AArch64_AM::SXTH: return "sxth";
case AArch64_AM::SXTW: return "sxtw";
case AArch64_AM::SXTX: return "sxtx";
}
return nullptr;
}
/// getShiftType - Extract the shift type.
static inline AArch64_AM::ShiftExtendType getShiftType(unsigned Imm) {
switch ((Imm >> 6) & 0x7) {
default: return AArch64_AM::InvalidShiftExtend;
case 0: return AArch64_AM::LSL;
case 1: return AArch64_AM::LSR;
case 2: return AArch64_AM::ASR;
case 3: return AArch64_AM::ROR;
case 4: return AArch64_AM::MSL;
}
}
/// getShiftValue - Extract the shift value.
static inline unsigned getShiftValue(unsigned Imm) {
return Imm & 0x3f;
}
/// getShifterImm - Encode the shift type and amount:
/// imm: 6-bit shift amount
/// shifter: 000 ==> lsl
/// 001 ==> lsr
/// 010 ==> asr
/// 011 ==> ror
/// 100 ==> msl
/// {8-6} = shifter
/// {5-0} = imm
static inline unsigned getShifterImm(AArch64_AM::ShiftExtendType ST,
unsigned Imm) {
assert((Imm & 0x3f) == Imm && "Illegal shifted immedate value!");
unsigned STEnc = 0;
switch (ST) {
default: llvm_unreachable("Invalid shift requested");
case AArch64_AM::LSL: STEnc = 0; break;
case AArch64_AM::LSR: STEnc = 1; break;
case AArch64_AM::ASR: STEnc = 2; break;
case AArch64_AM::ROR: STEnc = 3; break;
case AArch64_AM::MSL: STEnc = 4; break;
}
return (STEnc << 6) | (Imm & 0x3f);
}
//===----------------------------------------------------------------------===//
// Extends
//
/// getArithShiftValue - get the arithmetic shift value.
static inline unsigned getArithShiftValue(unsigned Imm) {
return Imm & 0x7;
}
/// getExtendType - Extract the extend type for operands of arithmetic ops.
static inline AArch64_AM::ShiftExtendType getExtendType(unsigned Imm) {
assert((Imm & 0x7) == Imm && "invalid immediate!");
switch (Imm) {
default: llvm_unreachable("Compiler bug!");
case 0: return AArch64_AM::UXTB;
case 1: return AArch64_AM::UXTH;
case 2: return AArch64_AM::UXTW;
case 3: return AArch64_AM::UXTX;
case 4: return AArch64_AM::SXTB;
case 5: return AArch64_AM::SXTH;
case 6: return AArch64_AM::SXTW;
case 7: return AArch64_AM::SXTX;
}
}
static inline AArch64_AM::ShiftExtendType getArithExtendType(unsigned Imm) {
return getExtendType((Imm >> 3) & 0x7);
}
/// Mapping from extend bits to required operation:
/// shifter: 000 ==> uxtb
/// 001 ==> uxth
/// 010 ==> uxtw
/// 011 ==> uxtx
/// 100 ==> sxtb
/// 101 ==> sxth
/// 110 ==> sxtw
/// 111 ==> sxtx
inline unsigned getExtendEncoding(AArch64_AM::ShiftExtendType ET) {
switch (ET) {
default: llvm_unreachable("Invalid extend type requested");
case AArch64_AM::UXTB: return 0; break;
case AArch64_AM::UXTH: return 1; break;
case AArch64_AM::UXTW: return 2; break;
case AArch64_AM::UXTX: return 3; break;
case AArch64_AM::SXTB: return 4; break;
case AArch64_AM::SXTH: return 5; break;
case AArch64_AM::SXTW: return 6; break;
case AArch64_AM::SXTX: return 7; break;
}
}
/// getArithExtendImm - Encode the extend type and shift amount for an
/// arithmetic instruction:
/// imm: 3-bit extend amount
/// {5-3} = shifter
/// {2-0} = imm3
static inline unsigned getArithExtendImm(AArch64_AM::ShiftExtendType ET,
unsigned Imm) {
assert((Imm & 0x7) == Imm && "Illegal shifted immedate value!");
return (getExtendEncoding(ET) << 3) | (Imm & 0x7);
}
/// getMemDoShift - Extract the "do shift" flag value for load/store
/// instructions.
static inline bool getMemDoShift(unsigned Imm) {
return (Imm & 0x1) != 0;
}
/// getExtendType - Extract the extend type for the offset operand of
/// loads/stores.
static inline AArch64_AM::ShiftExtendType getMemExtendType(unsigned Imm) {
return getExtendType((Imm >> 1) & 0x7);
}
/// getExtendImm - Encode the extend type and amount for a load/store inst:
/// doshift: should the offset be scaled by the access size
/// shifter: 000 ==> uxtb
/// 001 ==> uxth
/// 010 ==> uxtw
/// 011 ==> uxtx
/// 100 ==> sxtb
/// 101 ==> sxth
/// 110 ==> sxtw
/// 111 ==> sxtx
/// {3-1} = shifter
/// {0} = doshift
static inline unsigned getMemExtendImm(AArch64_AM::ShiftExtendType ET,
bool DoShift) {
return (getExtendEncoding(ET) << 1) | unsigned(DoShift);
}
static inline uint64_t ror(uint64_t elt, unsigned size) {
return ((elt & 1) << (size-1)) | (elt >> 1);
}
/// processLogicalImmediate - Determine if an immediate value can be encoded
/// as the immediate operand of a logical instruction for the given register
/// size. If so, return true with "encoding" set to the encoded value in
/// the form N:immr:imms.
static inline bool processLogicalImmediate(uint64_t Imm, unsigned RegSize,
uint64_t &Encoding) {
if (Imm == 0ULL || Imm == ~0ULL ||
(RegSize != 64 && (Imm >> RegSize != 0 || Imm == ~0U)))
return false;
// First, determine the element size.
unsigned Size = RegSize;
do {
Size /= 2;
uint64_t Mask = (1ULL << Size) - 1;
if ((Imm & Mask) != ((Imm >> Size) & Mask)) {
Size *= 2;
break;
}
} while (Size > 2);
// Second, determine the rotation to make the element be: 0^m 1^n.
uint32_t CTO, I;
uint64_t Mask = ((uint64_t)-1LL) >> (64 - Size);
Imm &= Mask;
if (isShiftedMask_64(Imm)) {
I = countTrailingZeros(Imm);
assert(I < 64 && "undefined behavior");
CTO = countTrailingOnes(Imm >> I);
} else {
Imm |= ~Mask;
if (!isShiftedMask_64(~Imm))
return false;
unsigned CLO = countLeadingOnes(Imm);
I = 64 - CLO;
CTO = CLO + countTrailingOnes(Imm) - (64 - Size);
}
// Encode in Immr the number of RORs it would take to get *from* 0^m 1^n
// to our target value, where I is the number of RORs to go the opposite
// direction.
assert(Size > I && "I should be smaller than element size");
unsigned Immr = (Size - I) & (Size - 1);
// If size has a 1 in the n'th bit, create a value that has zeroes in
// bits [0, n] and ones above that.
uint64_t NImms = ~(Size-1) << 1;
// Or the CTO value into the low bits, which must be below the Nth bit
// bit mentioned above.
NImms |= (CTO-1);
// Extract the seventh bit and toggle it to create the N field.
unsigned N = ((NImms >> 6) & 1) ^ 1;
Encoding = (N << 12) | (Immr << 6) | (NImms & 0x3f);
return true;
}
/// isLogicalImmediate - Return true if the immediate is valid for a logical
/// immediate instruction of the given register size. Return false otherwise.
static inline bool isLogicalImmediate(uint64_t imm, unsigned regSize) {
uint64_t encoding;
return processLogicalImmediate(imm, regSize, encoding);
}
/// encodeLogicalImmediate - Return the encoded immediate value for a logical
/// immediate instruction of the given register size.
static inline uint64_t encodeLogicalImmediate(uint64_t imm, unsigned regSize) {
uint64_t encoding = 0;
bool res = processLogicalImmediate(imm, regSize, encoding);
assert(res && "invalid logical immediate");
(void)res;
return encoding;
}
/// decodeLogicalImmediate - Decode a logical immediate value in the form
/// "N:immr:imms" (where the immr and imms fields are each 6 bits) into the
/// integer value it represents with regSize bits.
static inline uint64_t decodeLogicalImmediate(uint64_t val, unsigned regSize) {
// Extract the N, imms, and immr fields.
unsigned N = (val >> 12) & 1;
unsigned immr = (val >> 6) & 0x3f;
unsigned imms = val & 0x3f;
assert((regSize == 64 || N == 0) && "undefined logical immediate encoding");
int len = 31 - countLeadingZeros((N << 6) | (~imms & 0x3f));
assert(len >= 0 && "undefined logical immediate encoding");
unsigned size = (1 << len);
unsigned R = immr & (size - 1);
unsigned S = imms & (size - 1);
assert(S != size - 1 && "undefined logical immediate encoding");
uint64_t pattern = (1ULL << (S + 1)) - 1;
for (unsigned i = 0; i < R; ++i)
pattern = ror(pattern, size);
// Replicate the pattern to fill the regSize.
while (size != regSize) {
pattern |= (pattern << size);
size *= 2;
}
return pattern;
}
/// isValidDecodeLogicalImmediate - Check to see if the logical immediate value
/// in the form "N:immr:imms" (where the immr and imms fields are each 6 bits)
/// is a valid encoding for an integer value with regSize bits.
static inline bool isValidDecodeLogicalImmediate(uint64_t val,
unsigned regSize) {
// Extract the N and imms fields needed for checking.
unsigned N = (val >> 12) & 1;
unsigned imms = val & 0x3f;
if (regSize == 32 && N != 0) // undefined logical immediate encoding
return false;
int len = 31 - countLeadingZeros((N << 6) | (~imms & 0x3f));
if (len < 0) // undefined logical immediate encoding
return false;
unsigned size = (1 << len);
unsigned S = imms & (size - 1);
if (S == size - 1) // undefined logical immediate encoding
return false;
return true;
}
//===----------------------------------------------------------------------===//
// Floating-point Immediates
//
static inline float getFPImmFloat(unsigned Imm) {
// We expect an 8-bit binary encoding of a floating-point number here.
union {
uint32_t I;
float F;
} FPUnion;
uint8_t Sign = (Imm >> 7) & 0x1;
uint8_t Exp = (Imm >> 4) & 0x7;
uint8_t Mantissa = Imm & 0xf;
// 8-bit FP iEEEE Float Encoding
// abcd efgh aBbbbbbc defgh000 00000000 00000000
//
// where B = NOT(b);
FPUnion.I = 0;
FPUnion.I |= Sign << 31;
FPUnion.I |= ((Exp & 0x4) != 0 ? 0 : 1) << 30;
FPUnion.I |= ((Exp & 0x4) != 0 ? 0x1f : 0) << 25;
FPUnion.I |= (Exp & 0x3) << 23;
FPUnion.I |= Mantissa << 19;
return FPUnion.F;
}
/// getFP32Imm - Return an 8-bit floating-point version of the 32-bit
/// floating-point value. If the value cannot be represented as an 8-bit
/// floating-point value, then return -1.
static inline int getFP32Imm(const APInt &Imm) {
uint32_t Sign = Imm.lshr(31).getZExtValue() & 1;
int32_t Exp = (Imm.lshr(23).getSExtValue() & 0xff) - 127; // -126 to 127
int64_t Mantissa = Imm.getZExtValue() & 0x7fffff; // 23 bits
// We can handle 4 bits of mantissa.
// mantissa = (16+UInt(e:f:g:h))/16.
if (Mantissa & 0x7ffff)
return -1;
Mantissa >>= 19;
if ((Mantissa & 0xf) != Mantissa)
return -1;
// We can handle 3 bits of exponent: exp == UInt(NOT(b):c:d)-3
if (Exp < -3 || Exp > 4)
return -1;
Exp = ((Exp+3) & 0x7) ^ 4;
return ((int)Sign << 7) | (Exp << 4) | Mantissa;
}
static inline int getFP32Imm(const APFloat &FPImm) {
return getFP32Imm(FPImm.bitcastToAPInt());
}
/// getFP64Imm - Return an 8-bit floating-point version of the 64-bit
/// floating-point value. If the value cannot be represented as an 8-bit
/// floating-point value, then return -1.
static inline int getFP64Imm(const APInt &Imm) {
uint64_t Sign = Imm.lshr(63).getZExtValue() & 1;
int64_t Exp = (Imm.lshr(52).getSExtValue() & 0x7ff) - 1023; // -1022 to 1023
uint64_t Mantissa = Imm.getZExtValue() & 0xfffffffffffffULL;
// We can handle 4 bits of mantissa.
// mantissa = (16+UInt(e:f:g:h))/16.
if (Mantissa & 0xffffffffffffULL)
return -1;
Mantissa >>= 48;
if ((Mantissa & 0xf) != Mantissa)
return -1;
// We can handle 3 bits of exponent: exp == UInt(NOT(b):c:d)-3
if (Exp < -3 || Exp > 4)
return -1;
Exp = ((Exp+3) & 0x7) ^ 4;
return ((int)Sign << 7) | (Exp << 4) | Mantissa;
}
static inline int getFP64Imm(const APFloat &FPImm) {
return getFP64Imm(FPImm.bitcastToAPInt());
}
//===--------------------------------------------------------------------===//
// AdvSIMD Modified Immediates
//===--------------------------------------------------------------------===//
// 0x00 0x00 0x00 abcdefgh 0x00 0x00 0x00 abcdefgh
static inline bool isAdvSIMDModImmType1(uint64_t Imm) {
return ((Imm >> 32) == (Imm & 0xffffffffULL)) &&
((Imm & 0xffffff00ffffff00ULL) == 0);
}
static inline uint8_t encodeAdvSIMDModImmType1(uint64_t Imm) {
return (Imm & 0xffULL);
}
static inline uint64_t decodeAdvSIMDModImmType1(uint8_t Imm) {
uint64_t EncVal = Imm;
return (EncVal << 32) | EncVal;
}
// 0x00 0x00 abcdefgh 0x00 0x00 0x00 abcdefgh 0x00
static inline bool isAdvSIMDModImmType2(uint64_t Imm) {
return ((Imm >> 32) == (Imm & 0xffffffffULL)) &&
((Imm & 0xffff00ffffff00ffULL) == 0);
}
static inline uint8_t encodeAdvSIMDModImmType2(uint64_t Imm) {
return (Imm & 0xff00ULL) >> 8;
}
static inline uint64_t decodeAdvSIMDModImmType2(uint8_t Imm) {
uint64_t EncVal = Imm;
return (EncVal << 40) | (EncVal << 8);
}
// 0x00 abcdefgh 0x00 0x00 0x00 abcdefgh 0x00 0x00
static inline bool isAdvSIMDModImmType3(uint64_t Imm) {
return ((Imm >> 32) == (Imm & 0xffffffffULL)) &&
((Imm & 0xff00ffffff00ffffULL) == 0);
}
static inline uint8_t encodeAdvSIMDModImmType3(uint64_t Imm) {
return (Imm & 0xff0000ULL) >> 16;
}
static inline uint64_t decodeAdvSIMDModImmType3(uint8_t Imm) {
uint64_t EncVal = Imm;
return (EncVal << 48) | (EncVal << 16);
}
// abcdefgh 0x00 0x00 0x00 abcdefgh 0x00 0x00 0x00
static inline bool isAdvSIMDModImmType4(uint64_t Imm) {
return ((Imm >> 32) == (Imm & 0xffffffffULL)) &&
((Imm & 0x00ffffff00ffffffULL) == 0);
}
static inline uint8_t encodeAdvSIMDModImmType4(uint64_t Imm) {
return (Imm & 0xff000000ULL) >> 24;
}
static inline uint64_t decodeAdvSIMDModImmType4(uint8_t Imm) {
uint64_t EncVal = Imm;
return (EncVal << 56) | (EncVal << 24);
}
// 0x00 abcdefgh 0x00 abcdefgh 0x00 abcdefgh 0x00 abcdefgh
static inline bool isAdvSIMDModImmType5(uint64_t Imm) {
return ((Imm >> 32) == (Imm & 0xffffffffULL)) &&
(((Imm & 0x00ff0000ULL) >> 16) == (Imm & 0x000000ffULL)) &&
((Imm & 0xff00ff00ff00ff00ULL) == 0);
}
static inline uint8_t encodeAdvSIMDModImmType5(uint64_t Imm) {
return (Imm & 0xffULL);
}
static inline uint64_t decodeAdvSIMDModImmType5(uint8_t Imm) {
uint64_t EncVal = Imm;
return (EncVal << 48) | (EncVal << 32) | (EncVal << 16) | EncVal;
}
// abcdefgh 0x00 abcdefgh 0x00 abcdefgh 0x00 abcdefgh 0x00
static inline bool isAdvSIMDModImmType6(uint64_t Imm) {
return ((Imm >> 32) == (Imm & 0xffffffffULL)) &&
(((Imm & 0xff000000ULL) >> 16) == (Imm & 0x0000ff00ULL)) &&
((Imm & 0x00ff00ff00ff00ffULL) == 0);
}
static inline uint8_t encodeAdvSIMDModImmType6(uint64_t Imm) {
return (Imm & 0xff00ULL) >> 8;
}
static inline uint64_t decodeAdvSIMDModImmType6(uint8_t Imm) {
uint64_t EncVal = Imm;
return (EncVal << 56) | (EncVal << 40) | (EncVal << 24) | (EncVal << 8);
}
// 0x00 0x00 abcdefgh 0xFF 0x00 0x00 abcdefgh 0xFF
static inline bool isAdvSIMDModImmType7(uint64_t Imm) {
return ((Imm >> 32) == (Imm & 0xffffffffULL)) &&
((Imm & 0xffff00ffffff00ffULL) == 0x000000ff000000ffULL);
}
static inline uint8_t encodeAdvSIMDModImmType7(uint64_t Imm) {
return (Imm & 0xff00ULL) >> 8;
}
static inline uint64_t decodeAdvSIMDModImmType7(uint8_t Imm) {
uint64_t EncVal = Imm;
return (EncVal << 40) | (EncVal << 8) | 0x000000ff000000ffULL;
}
// 0x00 abcdefgh 0xFF 0xFF 0x00 abcdefgh 0xFF 0xFF
static inline bool isAdvSIMDModImmType8(uint64_t Imm) {
return ((Imm >> 32) == (Imm & 0xffffffffULL)) &&
((Imm & 0xff00ffffff00ffffULL) == 0x0000ffff0000ffffULL);
}
static inline uint64_t decodeAdvSIMDModImmType8(uint8_t Imm) {
uint64_t EncVal = Imm;
return (EncVal << 48) | (EncVal << 16) | 0x0000ffff0000ffffULL;
}
static inline uint8_t encodeAdvSIMDModImmType8(uint64_t Imm) {
return (Imm & 0x00ff0000ULL) >> 16;
}
// abcdefgh abcdefgh abcdefgh abcdefgh abcdefgh abcdefgh abcdefgh abcdefgh
static inline bool isAdvSIMDModImmType9(uint64_t Imm) {
return ((Imm >> 32) == (Imm & 0xffffffffULL)) &&
((Imm >> 48) == (Imm & 0x0000ffffULL)) &&
((Imm >> 56) == (Imm & 0x000000ffULL));
}
static inline uint8_t encodeAdvSIMDModImmType9(uint64_t Imm) {
return (Imm & 0xffULL);
}
static inline uint64_t decodeAdvSIMDModImmType9(uint8_t Imm) {
uint64_t EncVal = Imm;
EncVal |= (EncVal << 8);
EncVal |= (EncVal << 16);
EncVal |= (EncVal << 32);
return EncVal;
}
// aaaaaaaa bbbbbbbb cccccccc dddddddd eeeeeeee ffffffff gggggggg hhhhhhhh
// cmode: 1110, op: 1
static inline bool isAdvSIMDModImmType10(uint64_t Imm) {
uint64_t ByteA = Imm & 0xff00000000000000ULL;
uint64_t ByteB = Imm & 0x00ff000000000000ULL;
uint64_t ByteC = Imm & 0x0000ff0000000000ULL;
uint64_t ByteD = Imm & 0x000000ff00000000ULL;
uint64_t ByteE = Imm & 0x00000000ff000000ULL;
uint64_t ByteF = Imm & 0x0000000000ff0000ULL;
uint64_t ByteG = Imm & 0x000000000000ff00ULL;
uint64_t ByteH = Imm & 0x00000000000000ffULL;
return (ByteA == 0ULL || ByteA == 0xff00000000000000ULL) &&
(ByteB == 0ULL || ByteB == 0x00ff000000000000ULL) &&
(ByteC == 0ULL || ByteC == 0x0000ff0000000000ULL) &&
(ByteD == 0ULL || ByteD == 0x000000ff00000000ULL) &&
(ByteE == 0ULL || ByteE == 0x00000000ff000000ULL) &&
(ByteF == 0ULL || ByteF == 0x0000000000ff0000ULL) &&
(ByteG == 0ULL || ByteG == 0x000000000000ff00ULL) &&
(ByteH == 0ULL || ByteH == 0x00000000000000ffULL);
}
static inline uint8_t encodeAdvSIMDModImmType10(uint64_t Imm) {
uint8_t BitA = (Imm & 0xff00000000000000ULL) != 0;
uint8_t BitB = (Imm & 0x00ff000000000000ULL) != 0;
uint8_t BitC = (Imm & 0x0000ff0000000000ULL) != 0;
uint8_t BitD = (Imm & 0x000000ff00000000ULL) != 0;
uint8_t BitE = (Imm & 0x00000000ff000000ULL) != 0;
uint8_t BitF = (Imm & 0x0000000000ff0000ULL) != 0;
uint8_t BitG = (Imm & 0x000000000000ff00ULL) != 0;
uint8_t BitH = (Imm & 0x00000000000000ffULL) != 0;
uint8_t EncVal = BitA;
EncVal <<= 1;
EncVal |= BitB;
EncVal <<= 1;
EncVal |= BitC;
EncVal <<= 1;
EncVal |= BitD;
EncVal <<= 1;
EncVal |= BitE;
EncVal <<= 1;
EncVal |= BitF;
EncVal <<= 1;
EncVal |= BitG;
EncVal <<= 1;
EncVal |= BitH;
return EncVal;
}
static inline uint64_t decodeAdvSIMDModImmType10(uint8_t Imm) {
uint64_t EncVal = 0;
if (Imm & 0x80) EncVal |= 0xff00000000000000ULL;
if (Imm & 0x40) EncVal |= 0x00ff000000000000ULL;
if (Imm & 0x20) EncVal |= 0x0000ff0000000000ULL;
if (Imm & 0x10) EncVal |= 0x000000ff00000000ULL;
if (Imm & 0x08) EncVal |= 0x00000000ff000000ULL;
if (Imm & 0x04) EncVal |= 0x0000000000ff0000ULL;
if (Imm & 0x02) EncVal |= 0x000000000000ff00ULL;
if (Imm & 0x01) EncVal |= 0x00000000000000ffULL;
return EncVal;
}
// aBbbbbbc defgh000 0x00 0x00 aBbbbbbc defgh000 0x00 0x00
static inline bool isAdvSIMDModImmType11(uint64_t Imm) {
uint64_t BString = (Imm & 0x7E000000ULL) >> 25;
return ((Imm >> 32) == (Imm & 0xffffffffULL)) &&
(BString == 0x1f || BString == 0x20) &&
((Imm & 0x0007ffff0007ffffULL) == 0);
}
static inline uint8_t encodeAdvSIMDModImmType11(uint64_t Imm) {
uint8_t BitA = (Imm & 0x80000000ULL) != 0;
uint8_t BitB = (Imm & 0x20000000ULL) != 0;
uint8_t BitC = (Imm & 0x01000000ULL) != 0;
uint8_t BitD = (Imm & 0x00800000ULL) != 0;
uint8_t BitE = (Imm & 0x00400000ULL) != 0;
uint8_t BitF = (Imm & 0x00200000ULL) != 0;
uint8_t BitG = (Imm & 0x00100000ULL) != 0;
uint8_t BitH = (Imm & 0x00080000ULL) != 0;
uint8_t EncVal = BitA;
EncVal <<= 1;
EncVal |= BitB;
EncVal <<= 1;
EncVal |= BitC;
EncVal <<= 1;
EncVal |= BitD;
EncVal <<= 1;
EncVal |= BitE;
EncVal <<= 1;
EncVal |= BitF;
EncVal <<= 1;
EncVal |= BitG;
EncVal <<= 1;
EncVal |= BitH;
return EncVal;
}
static inline uint64_t decodeAdvSIMDModImmType11(uint8_t Imm) {
uint64_t EncVal = 0;
if (Imm & 0x80) EncVal |= 0x80000000ULL;
if (Imm & 0x40) EncVal |= 0x3e000000ULL;
else EncVal |= 0x40000000ULL;
if (Imm & 0x20) EncVal |= 0x01000000ULL;
if (Imm & 0x10) EncVal |= 0x00800000ULL;
if (Imm & 0x08) EncVal |= 0x00400000ULL;
if (Imm & 0x04) EncVal |= 0x00200000ULL;
if (Imm & 0x02) EncVal |= 0x00100000ULL;
if (Imm & 0x01) EncVal |= 0x00080000ULL;
return (EncVal << 32) | EncVal;
}
// aBbbbbbb bbcdefgh 0x00 0x00 0x00 0x00 0x00 0x00
static inline bool isAdvSIMDModImmType12(uint64_t Imm) {
uint64_t BString = (Imm & 0x7fc0000000000000ULL) >> 54;
return ((BString == 0xff || BString == 0x100) &&
((Imm & 0x0000ffffffffffffULL) == 0));
}
static inline uint8_t encodeAdvSIMDModImmType12(uint64_t Imm) {
uint8_t BitA = (Imm & 0x8000000000000000ULL) != 0;
uint8_t BitB = (Imm & 0x0040000000000000ULL) != 0;
uint8_t BitC = (Imm & 0x0020000000000000ULL) != 0;
uint8_t BitD = (Imm & 0x0010000000000000ULL) != 0;
uint8_t BitE = (Imm & 0x0008000000000000ULL) != 0;
uint8_t BitF = (Imm & 0x0004000000000000ULL) != 0;
uint8_t BitG = (Imm & 0x0002000000000000ULL) != 0;
uint8_t BitH = (Imm & 0x0001000000000000ULL) != 0;
uint8_t EncVal = BitA;
EncVal <<= 1;
EncVal |= BitB;
EncVal <<= 1;
EncVal |= BitC;
EncVal <<= 1;
EncVal |= BitD;
EncVal <<= 1;
EncVal |= BitE;
EncVal <<= 1;
EncVal |= BitF;
EncVal <<= 1;
EncVal |= BitG;
EncVal <<= 1;
EncVal |= BitH;
return EncVal;
}
static inline uint64_t decodeAdvSIMDModImmType12(uint8_t Imm) {
uint64_t EncVal = 0;
if (Imm & 0x80) EncVal |= 0x8000000000000000ULL;
if (Imm & 0x40) EncVal |= 0x3fc0000000000000ULL;
else EncVal |= 0x4000000000000000ULL;
if (Imm & 0x20) EncVal |= 0x0020000000000000ULL;
if (Imm & 0x10) EncVal |= 0x0010000000000000ULL;
if (Imm & 0x08) EncVal |= 0x0008000000000000ULL;
if (Imm & 0x04) EncVal |= 0x0004000000000000ULL;
if (Imm & 0x02) EncVal |= 0x0002000000000000ULL;
if (Imm & 0x01) EncVal |= 0x0001000000000000ULL;
return (EncVal << 32) | EncVal;
}
} // end namespace AArch64_AM
} // end namespace llvm
#endif
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