#ifndef LLVM_APINT_H
#define LLVM_APINT_H
+#include "llvm/ADT/ArrayRef.h"
#include "llvm/Support/MathExtras.h"
#include <cassert>
#include <climits>
/// not assume that the string is well-formed and (2) grows the
/// result to hold the input.
///
- /// @param radix 2, 8, 10, or 16
+ /// @param radix 2, 8, 10, 16, or 36
/// @brief Convert a char array into an APInt
void fromString(unsigned numBits, StringRef str, uint8_t radix);
/// out-of-line slow case for inline constructor
void initSlowCase(unsigned numBits, uint64_t val, bool isSigned);
+ /// shared code between two array constructors
+ void initFromArray(ArrayRef<uint64_t> array);
+
/// out-of-line slow case for inline copy constructor
void initSlowCase(const APInt& that);
clearUnusedBits();
}
- /// Note that numWords can be smaller or larger than the corresponding bit
- /// width but any extraneous bits will be dropped.
+ /// Note that bigVal.size() can be smaller or larger than the corresponding
+ /// bit width but any extraneous bits will be dropped.
/// @param numBits the bit width of the constructed APInt
- /// @param numWords the number of words in bigVal
/// @param bigVal a sequence of words to form the initial value of the APInt
/// @brief Construct an APInt of numBits width, initialized as bigVal[].
+ APInt(unsigned numBits, ArrayRef<uint64_t> bigVal);
+ /// Equivalent to APInt(numBits, ArrayRef<uint64_t>(bigVal, numWords)), but
+ /// deprecated because this constructor is prone to ambiguity with the
+ /// APInt(unsigned, uint64_t, bool) constructor.
+ ///
+ /// If this overload is ever deleted, care should be taken to prevent calls
+ /// from being incorrectly captured by the APInt(unsigned, uint64_t, bool)
+ /// constructor.
APInt(unsigned numBits, unsigned numWords, const uint64_t bigVal[]);
/// This constructor interprets the string \arg str in the given radix. The
/// interpretation stops when the first character that is not suitable for the
/// radix is encountered, or the end of the string. Acceptable radix values
- /// are 2, 8, 10 and 16. It is an error for the value implied by the string to
- /// require more bits than numBits.
+ /// are 2, 8, 10, 16, and 36. It is an error for the value implied by the
+ /// string to require more bits than numBits.
///
/// @param numBits the bit width of the constructed APInt
/// @param str the string to be interpreted
if (isSingleWord())
return isUIntN(N, VAL);
- return APInt(N, getNumWords(), pVal).zext(getBitWidth()) == (*this);
+ return APInt(N, makeArrayRef(pVal, getNumWords())).zext(getBitWidth())
+ == (*this);
}
/// @brief Check if this APInt has an N-bits signed integer value.
/// @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
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
/// @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.
+ /// radix given. The radix can be 2, 8, 10 16, or 36.
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.
+ /// radix given. The radix can be 2, 8, 10, 16, or 36.
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