diff options
Diffstat (limited to 'include/llvm/ADT/APInt.h')
| -rw-r--r-- | include/llvm/ADT/APInt.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h index 2381b75e08b1..8dce5a621bb3 100644 --- a/include/llvm/ADT/APInt.h +++ b/include/llvm/ADT/APInt.h @@ -1467,6 +1467,13 @@ public: U.pVal[whichWord(BitPosition)] &= Mask; } + /// Set bottom loBits bits to 0. + void clearLowBits(unsigned loBits) { + assert(loBits <= BitWidth && "More bits than bitwidth"); + APInt Keep = getHighBitsSet(BitWidth, BitWidth - loBits); + *this &= Keep; + } + /// Set the sign bit to 0. void clearSignBit() { clearBit(BitWidth - 1); @@ -1496,9 +1503,11 @@ public: /// Insert the bits from a smaller APInt starting at bitPosition. void insertBits(const APInt &SubBits, unsigned bitPosition); + void insertBits(uint64_t SubBits, unsigned bitPosition, unsigned numBits); /// Return an APInt with the extracted bits [bitPosition,bitPosition+numBits). APInt extractBits(unsigned numBits, unsigned bitPosition) const; + uint64_t extractBitsAsZExtValue(unsigned numBits, unsigned bitPosition) const; /// @} /// \name Value Characterization Functions |