/// @returns true if this APInt is positive.
/// @brief Determine if this APInt Value is positive.
bool isStrictlyPositive() const {
- return isNonNegative() && (*this) != 0;
+ return isNonNegative() && !!*this;
}
/// This checks to see if the value has all bits of the APInt are set or not.
/// value for the APInt's bit width.
/// @brief Determine if this is the smallest unsigned value.
bool isMinValue() const {
- return countPopulation() == 0;
+ return !*this;
}
/// This checks to see if the value of this APInt is the minimum signed
/// value for the APInt's bit width.
/// @brief Determine if this is the smallest signed value.
bool isMinSignedValue() const {
- return BitWidth == 1 ? VAL == 1 :
- isNegative() && countPopulation() == 1;
+ return BitWidth == 1 ? VAL == 1 : isNegative() && isPowerOf2();
}
/// @brief Check if this APInt has an N-bits unsigned integer value.
if (isSingleWord())
return isUIntN(N, VAL);
- APInt Tmp(N, getNumWords(), pVal);
- Tmp.zext(getBitWidth());
- return Tmp == (*this);
+ return APInt(N, getNumWords(), pVal).zext(getBitWidth()) == (*this);
}
/// @brief Check if this APInt has an N-bits signed integer value.
}
/// @returns true if the argument APInt value is a power of two > 0.
- bool isPowerOf2() const;
+ bool isPowerOf2() const {
+ if (isSingleWord())
+ return isPowerOf2_64(VAL);
+ return countPopulationSlowCase() == 1;
+ }
/// isSignBit - Return true if this is the value returned by getSignBit.
bool isSignBit() const { return isMinSignedValue(); }
/// This converts the APInt to a boolean value as a test against zero.
/// @brief Boolean conversion function.
bool getBoolValue() const {
- return *this != 0;
+ return !!*this;
}
/// getLimitedValue - If this value is smaller than the specified limit,
/// @{
/// @brief Gets maximum unsigned value of APInt for specific bit width.
static APInt getMaxValue(unsigned numBits) {
- APInt API(numBits, 0);
- API.set();
- return API;
+ return getAllOnesValue(numBits);
}
/// @brief Gets maximum signed value of APInt for a specific bit width.
static APInt getSignedMaxValue(unsigned numBits) {
- APInt API(numBits, 0);
- API.set();
- API.clear(numBits - 1);
+ APInt API = getAllOnesValue(numBits);
+ API.clearBit(numBits - 1);
return API;
}
/// @brief Gets minimum signed value of APInt for a specific bit width.
static APInt getSignedMinValue(unsigned numBits) {
APInt API(numBits, 0);
- API.set(numBits - 1);
+ API.setBit(numBits - 1);
return API;
}
/// @returns the all-ones value for an APInt of the specified bit-width.
/// @brief Get the all-ones value.
static APInt getAllOnesValue(unsigned numBits) {
- APInt API(numBits, 0);
- API.set();
- return API;
+ return APInt(numBits, -1ULL, true);
}
/// @returns the '0' value for an APInt of the specified bit-width.
/// @returns the low "numBits" bits of this APInt.
APInt getLoBits(unsigned numBits) const;
+ /// getOneBitSet - Return an APInt with exactly one bit set in the result.
+ static APInt getOneBitSet(unsigned numBits, unsigned BitNo) {
+ APInt Res(numBits, 0);
+ Res.setBit(BitNo);
+ return Res;
+ }
+
/// Constructs an APInt value that has a contiguous range of bits set. The
/// bits from loBit (inclusive) to hiBit (exclusive) will be set. All other
/// bits will be zero. For example, with parameters(32, 0, 16) you would get
/// @brief Unary bitwise complement operator.
APInt operator~() const {
APInt Result(*this);
- Result.flip();
+ Result.flipAllBits();
return Result;
}
APInt usub_ov(const APInt &RHS, bool &Overflow) const;
APInt sdiv_ov(const APInt &RHS, bool &Overflow) const;
APInt smul_ov(const APInt &RHS, bool &Overflow) const;
+ APInt umul_ov(const APInt &RHS, bool &Overflow) const;
APInt sshl_ov(unsigned Amt, bool &Overflow) const;
/// @returns the bit value at bitPosition
/// Truncate the APInt to a specified width. It is an error to specify a width
/// that is greater than or equal to the current width.
/// @brief Truncate to new width.
- APInt &trunc(unsigned width);
+ APInt trunc(unsigned width) const;
/// This operation sign extends the APInt to a new width. If the high order
/// bit is set, the fill on the left will be done with 1 bits, otherwise zero.
/// It is an error to specify a width that is less than or equal to the
/// current width.
/// @brief Sign extend to a new width.
- APInt &sext(unsigned width);
+ APInt sext(unsigned width) const;
/// This operation zero extends the APInt to a new width. The high order bits
/// are filled with 0 bits. It is an error to specify a width that is less
/// than or equal to the current width.
/// @brief Zero extend to a new width.
- APInt &zext(unsigned width);
+ APInt zext(unsigned width) const;
/// Make this APInt have the bit width given by \p width. The value is sign
/// extended, truncated, or left alone to make it that width.
/// @brief Sign extend or truncate to width
- APInt &sextOrTrunc(unsigned width);
+ APInt sextOrTrunc(unsigned width) const;
/// Make this APInt have the bit width given by \p width. The value is zero
/// extended, truncated, or left alone to make it that width.
/// @brief Zero extend or truncate to width
- APInt &zextOrTrunc(unsigned width);
+ APInt zextOrTrunc(unsigned width) const;
/// @}
/// @name Bit Manipulation Operators
/// @{
/// @brief Set every bit to 1.
- void set() {
+ void setAllBits() {
if (isSingleWord())
VAL = -1ULL;
else {
/// Set the given bit to 1 whose position is given as "bitPosition".
/// @brief Set a given bit to 1.
- void set(unsigned bitPosition);
+ void setBit(unsigned bitPosition);
/// @brief Set every bit to 0.
- void clear() {
+ void clearAllBits() {
if (isSingleWord())
VAL = 0;
else
/// Set the given bit to 0 whose position is given as "bitPosition".
/// @brief Set a given bit to 0.
- void clear(unsigned bitPosition);
+ void clearBit(unsigned bitPosition);
/// @brief Toggle every bit to its opposite value.
- void flip() {
+ void flipAllBits() {
if (isSingleWord())
VAL ^= -1ULL;
else {
/// Toggle a given bit to its opposite value whose position is given
/// as "bitPosition".
/// @brief Toggles a given bit to its opposite value.
- void flip(unsigned bitPosition);
+ void flipBit(unsigned bitPosition);
/// @}
/// @name Value Characterization Functions
/// @brief Count the number of leading one bits.
unsigned countLeadingOnes() const;
+ /// Computes the number of leading bits of this APInt that are equal to its
+ /// sign bit.
+ unsigned getNumSignBits() const {
+ return isNegative() ? countLeadingOnes() : countLeadingZeros();
+ }
+
/// countTrailingZeros - This function is an APInt version of the
/// countTrailingZeros_{32,64} functions in MathExtras.h. It counts
/// the number of zeros from the least significant bit to the first set bit.
/// toString - Converts an APInt to a string and append it to Str. Str is
/// commonly a SmallString.
- void toString(SmallVectorImpl<char> &Str, unsigned Radix, bool Signed) const;
+ void toString(SmallVectorImpl<char> &Str, unsigned Radix, bool Signed,
+ bool formatAsCLiteral = false) const;
/// Considers the APInt to be unsigned and converts it into a string in the
/// radix given. The radix can be 2, 8, 10 or 16.
void toStringUnsigned(SmallVectorImpl<char> &Str, unsigned Radix = 10) const {
- toString(Str, Radix, false);
+ toString(Str, Radix, false, false);
}
/// Considers the APInt to be signed and converts it into a string in the
/// radix given. The radix can be 2, 8, 10 or 16.
void toStringSigned(SmallVectorImpl<char> &Str, unsigned Radix = 10) const {
- toString(Str, Radix, true);
+ toString(Str, Radix, true, false);
}
/// toString - This returns the APInt as a std::string. Note that this is an
/// Calculate the magic number for unsigned division by a constant.
struct mu;
- mu magicu() const;
+ mu magicu(unsigned LeadingZeros = 0) const;
/// @}
/// @name Building-block Operations for APInt and APFloat
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