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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2013-02-20 13:00:06 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2013-02-20 13:00:06 +0000 |
| commit | ad4da0fc321230261b4d0387f0ec216eb8aa50ca (patch) | |
| tree | 46df094a9b70df155db7ba54ad220991d7bc86de /include/llvm/ADT/APInt.h | |
| parent | 52981c4b6016d9f0e295e0771ec0a50dd073b4b3 (diff) | |
| download | llvm-ad4da0fc321230261b4d0387f0ec216eb8aa50ca.tar.gz llvm-ad4da0fc321230261b4d0387f0ec216eb8aa50ca.tar.bz2 llvm-ad4da0fc321230261b4d0387f0ec216eb8aa50ca.tar.xz | |
Move the SplatByte helper to APInt and generalize it a bit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175621 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/ADT/APInt.h')
| -rw-r--r-- | include/llvm/ADT/APInt.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/llvm/ADT/APInt.h b/include/llvm/ADT/APInt.h index 41234da662..13b353c93b 100644 --- a/include/llvm/ADT/APInt.h +++ b/include/llvm/ADT/APInt.h @@ -505,6 +505,17 @@ public: return getAllOnesValue(numBits).lshr(numBits - loBitsSet); } + /// \brief Return a value containing V broadcasted over NewLen bits. + static APInt getSplat(unsigned NewLen, const APInt &V) { + assert(NewLen >= V.getBitWidth() && "Can't splat to smaller bit width!"); + + APInt Val = V.zextOrSelf(NewLen); + for (unsigned I = V.getBitWidth(); I < NewLen; I <<= 1) + Val |= Val << I; + + return Val; + } + /// \brief Determine if two APInts have the same value, after zero-extending /// one of them (if needed!) to ensure that the bit-widths match. static bool isSameValue(const APInt &I1, const APInt &I2) { |