Use size_t instead of long to represent memory usage. long is 32 bits

[oota-llvm.git] / include / llvm / Support / MathExtras.h

diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h
index f3dc3de17bbcec914ef59d761ea5196904ad37ba..bfc175f2c1ff529cfefd280de9cd150b918cded2 100644 (file)
--- a/include/llvm/Support/MathExtras.h
+++ b/include/llvm/Support/MathExtras.h
@@ -1,32 +1,59 @@
-// $Id$ -*-c++-*-
-//***************************************************************************
-// File:
-//     MathExtras.h
+//===-- llvm/Support/MathExtras.h - Useful math functions -------*- C++ -*-===//
 // 
-// 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;
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file contains some functions that are useful for math stuff.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_MATHEXTRAS_H
+#define LLVM_SUPPORT_MATHEXTRAS_H
+
+#include "llvm/Support/DataTypes.h"
+
+namespace llvm {
+
+#if defined(log2)
+# undef log2
+#endif
+
+inline unsigned log2(uint64_t C) {
+  unsigned getPow;
+  for (getPow = 0; C > 1; ++getPow)
+    C >>= 1;
+  return getPow;
+}
+
+inline unsigned log2(unsigned C) {
+  unsigned getPow;
+  for (getPow = 0; C > 1; ++getPow)
+    C >>= 1;
+  return getPow;
+}
+
+inline bool isPowerOf2(int64_t C, unsigned &getPow) {
+  if (C < 0) C = -C;
+  if (C > 0 && C == (C & ~(C - 1))) {
+    getPow = log2(static_cast<uint64_t>(C));
+    return true;
+  }
+
+  return false;
 }
 
-#endif /*LLVM_SUPPORT_MATH_EXTRAS_H*/
+// Platform-independent wrappers for the C99 isnan() function.
+int IsNAN (float f);
+int IsNAN (double d);
+
+// Platform-independent wrappers for the C99 isinf() function.
+int IsInf (float f);
+int IsInf (double d);
+
+} // End llvm namespace
+
+#endif