diff options
| author | Chris Lattner <sabre@nondot.org> | 2001-11-27 00:03:19 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2001-11-27 00:03:19 +0000 |
| commit | cee8f9ae67104576b2028125b56e9ba4856a1d66 (patch) | |
| tree | c09d4ff10492acc211b36238768e14ccfd32d750 /include/llvm/Support/MathExtras.h | |
| parent | 360e17eaf1a2abda82b02235dc57d26d8f83c937 (diff) | |
| download | llvm-cee8f9ae67104576b2028125b56e9ba4856a1d66.tar.gz llvm-cee8f9ae67104576b2028125b56e9ba4856a1d66.tar.bz2 llvm-cee8f9ae67104576b2028125b56e9ba4856a1d66.tar.xz | |
Create a new #include "Support/..." directory structure to move things
from "llvm/Support/..." that are not llvm dependant.
Move files and fix #includes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1400 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Support/MathExtras.h')
| -rw-r--r-- | include/llvm/Support/MathExtras.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h new file mode 100644 index 0000000000..f3dc3de17b --- /dev/null +++ b/include/llvm/Support/MathExtras.h @@ -0,0 +1,32 @@ +// $Id$ -*-c++-*- +//*************************************************************************** +// File: +// MathExtras.h +// +// Purpose: +// +// History: +// 8/25/01 - Vikram Adve - Created +//**************************************************************************/ + +#ifndef LLVM_SUPPORT_MATH_EXTRAS_H +#define LLVM_SUPPORT_MATH_EXTRAS_H + +#include <sys/types.h> + +inline bool IsPowerOf2 (int64_t C, unsigned& getPow); + +inline +bool IsPowerOf2(int64_t C, unsigned& getPow) +{ + if (C < 0) + C = -C; + bool isBool = C > 0 && (C == (C & ~(C - 1))); + if (isBool) + for (getPow = 0; C > 1; getPow++) + C = C >> 1; + + return isBool; +} + +#endif /*LLVM_SUPPORT_MATH_EXTRAS_H*/ |