From cee8f9ae67104576b2028125b56e9ba4856a1d66 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Tue, 27 Nov 2001 00:03:19 +0000 Subject: 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 --- include/Support/MathExtras.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 include/Support/MathExtras.h (limited to 'include/Support/MathExtras.h') diff --git a/include/Support/MathExtras.h b/include/Support/MathExtras.h new file mode 100644 index 0000000000..f3dc3de17b --- /dev/null +++ b/include/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 + +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*/ -- cgit v1.2.3-18-g5258