APInt getLoBits(uint32_t numBits) const;
/// Constructs an APInt value that has a contiguous range of bits set. The
- /// bits from loBit to hiBit will be set. All other bits will be zero. For
- /// example, with parameters(32, 0, 15) you would get 0x0000FFFF. If hiBit is
- /// less than loBit then the set bits "wrap". For example, with
- /// parameters (32, 28, 3), you would get 0xF000000F.
+ /// 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
+ /// 0x0000FFFF. If hiBit is less than loBit then the set bits "wrap". For
+ /// example, with parameters (32, 28, 4), you would get 0xF000000F.
/// @param numBits the intended bit width of the result
/// @param loBit the index of the lowest bit set.
/// @param hiBit the index of the highest 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 loBit, uint32_t hiBit) {
- assert(hiBit < numBits && "hiBit out of range");
+ assert(hiBit <= numBits && "hiBit out of range");
assert(loBit < numBits && "loBit out of range");
if (hiBit < loBit)
- return getLowBitsSet(numBits, hiBit+1) |
+ return getLowBitsSet(numBits, hiBit) |
getHighBitsSet(numBits, numBits-loBit);
- return getLowBitsSet(numBits, hiBit-loBit+1).shl(loBit);
+ return getLowBitsSet(numBits, hiBit-loBit).shl(loBit);
}
/// Constructs an APInt value that has the top hiBitsSet bits set.