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Cleanups, rename IsPowerOf2 to isPowerOf2

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2662 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2002-05-19 21:19:55 +00:00
parent 4335ad5056
commit 54ea60c69e
2 changed files with 36 additions and 54 deletions
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39
include/Support/MathExtras.h
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@@ -1,38 +1,29 @@
// $Id$ -*-c++-*- //===-- Support/MathExtras.h - Useful math functions -------------*- C++ -*--=//
//***************************************************************************
// File:
// MathExtras.h
// //
// Purpose: // This file contains some functions that are useful for math stuff.
// //
// History: //===----------------------------------------------------------------------===//
// 8/25/01 - Vikram Adve - Created
//**************************************************************************/
#ifndef LLVM_SUPPORT_MATH_EXTRAS_H #ifndef SUPPORT_MATH_EXTRAS_H
#define LLVM_SUPPORT_MATH_EXTRAS_H #define SUPPORT_MATH_EXTRAS_H
#include <Support/DataTypes.h> #include <Support/DataTypes.h>
inline unsigned inline unsigned log2(uint64_t C) {
log2(uint64_t C)
{
unsigned getPow; unsigned getPow;
for (getPow = 0; C > 1; getPow++) for (getPow = 0; C > 1; ++getPow)
C = C >> 1; C >>= 1;
return getPow; return getPow;
} }
inline bool inline bool isPowerOf2(int64_t C, unsigned &getPow) {
IsPowerOf2(int64_t C, unsigned& getPow) if (C < 0) C = -C;
{ if (C > 0 && C == (C & ~(C - 1))) {
if (C < 0)
C = -C;
bool isPowerOf2 = C > 0 && (C == (C & ~(C - 1)));
if (isPowerOf2)
getPow = log2(C); getPow = log2(C);
return true;
}
return isPowerOf2; return false;
} }
#endif /*LLVM_SUPPORT_MATH_EXTRAS_H*/ #endif

39
include/llvm/Support/MathExtras.h
View File

@@ -1,38 +1,29 @@
// $Id$ -*-c++-*- //===-- Support/MathExtras.h - Useful math functions -------------*- C++ -*--=//
//***************************************************************************
// File:
// MathExtras.h
// //
// Purpose: // This file contains some functions that are useful for math stuff.
// //
// History: //===----------------------------------------------------------------------===//
// 8/25/01 - Vikram Adve - Created
//**************************************************************************/
#ifndef LLVM_SUPPORT_MATH_EXTRAS_H #ifndef SUPPORT_MATH_EXTRAS_H
#define LLVM_SUPPORT_MATH_EXTRAS_H #define SUPPORT_MATH_EXTRAS_H
#include <Support/DataTypes.h> #include <Support/DataTypes.h>
inline unsigned inline unsigned log2(uint64_t C) {
log2(uint64_t C)
{
unsigned getPow; unsigned getPow;
for (getPow = 0; C > 1; getPow++) for (getPow = 0; C > 1; ++getPow)
C = C >> 1; C >>= 1;
return getPow; return getPow;
} }
inline bool inline bool isPowerOf2(int64_t C, unsigned &getPow) {
IsPowerOf2(int64_t C, unsigned& getPow) if (C < 0) C = -C;
{ if (C > 0 && C == (C & ~(C - 1))) {
if (C < 0)
C = -C;
bool isPowerOf2 = C > 0 && (C == (C & ~(C - 1)));
if (isPowerOf2)
getPow = log2(C); getPow = log2(C);
return true;
}
return isPowerOf2; return false;
} }
#endif /*LLVM_SUPPORT_MATH_EXTRAS_H*/ #endif