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[block-freq] Add the APInt method extractBit.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197271 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Gottesman
2013-12-13 20:47:34 +00:00
parent a23bd2e761
commit 5bb504f4ea
3 changed files with 37 additions and 0 deletions
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8
lib/Support/APInt.cpp
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@ -607,6 +607,14 @@ void APInt::flipBit(unsigned bitPosition) {
else setBit(bitPosition);
}
bool APInt::extractBit(unsigned bitPosition) const {
assert(bitPosition < BitWidth && "Out of the bit-width range!");
if (isSingleWord())
return VAL & maskBit(bitPosition);
else
return pVal[whichWord(bitPosition)] & maskBit(bitPosition);
}
unsigned APInt::getBitsNeeded(StringRef str, uint8_t radix) {
assert(!str.empty() && "Invalid string length");
assert((radix == 10 || radix == 8 || radix == 16 || radix == 2 ||