diff options
Diffstat (limited to 'lib/Support/APInt.cpp')
-rw-r--r-- | lib/Support/APInt.cpp | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp index 143ded920e..b5411bec9d 100644 --- a/lib/Support/APInt.cpp +++ b/lib/Support/APInt.cpp @@ -1338,14 +1338,10 @@ APInt APInt::rotl(const APInt &rotateAmt) const { } APInt APInt::rotl(unsigned rotateAmt) const { + rotateAmt %= BitWidth; if (rotateAmt == 0) return *this; - // Don't get too fancy, just use existing shift/or facilities - APInt hi(*this); - APInt lo(*this); - hi.shl(rotateAmt); - lo.lshr(BitWidth - rotateAmt); - return hi | lo; + return shl(rotateAmt) | lshr(BitWidth - rotateAmt); } APInt APInt::rotr(const APInt &rotateAmt) const { @@ -1353,14 +1349,10 @@ APInt APInt::rotr(const APInt &rotateAmt) const { } APInt APInt::rotr(unsigned rotateAmt) const { + rotateAmt %= BitWidth; if (rotateAmt == 0) return *this; - // Don't get too fancy, just use existing shift/or facilities - APInt hi(*this); - APInt lo(*this); - lo.lshr(rotateAmt); - hi.shl(BitWidth - rotateAmt); - return hi | lo; + return lshr(rotateAmt) | shl(BitWidth - rotateAmt); } // Square Root - this method computes and returns the square root of "this". |