/// @param loBit the index of the lowest bit set.
/// @returns An APInt value with the requested bits set.
/// @brief Get a value with a block of bits set.
- static APInt getBitsSet(uint32_t numBits, uint32_t hiBit, uint32_t loBit = 0);
+ static APInt getBitsSet(uint32_t numBits, uint32_t hiBit, uint32_t loBit = 0){
+ assert(hiBit < numBits && "hiBit out of range");
+ assert(loBit < numBits && "loBit out of range");
+ if (hiBit < loBit)
+ return getLowBitsSet(numBits, hiBit+1) |
+ getHighBitsSet(numBits, numBits-loBit+1);
+ else if (loBit == 0)
+ return getLowBitsSet(numBits, hiBit+1);
+ return getLowBitsSet(numBits, hiBit-loBit+1).shl(loBit);
+ }
/// Constructs an APInt value that has the top hiBitsSet bits set.
/// @param numBits the bitwidth of the result