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 bd5692b3ddb6fe05dd14f5e9e74ac1147bb5ac0d..bfc175f2c1ff529cfefd280de9cd150b918cded2 100644 (file)
--- a/include/llvm/Support/MathExtras.h
+++ b/include/llvm/Support/MathExtras.h
@@ -1,13 +1,26 @@
-//===-- Support/MathExtras.h - Useful math functions -------------*- C++ -*--=//
+//===-- llvm/Support/MathExtras.h - Useful math functions -------*- C++ -*-===//
+// 
+//                     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 SUPPORT_MATH_EXTRAS_H
-#define SUPPORT_MATH_EXTRAS_H
+#ifndef LLVM_SUPPORT_MATHEXTRAS_H
+#define LLVM_SUPPORT_MATHEXTRAS_H
 
-#include <Support/DataTypes.h>
+#include "llvm/Support/DataTypes.h"
+
+namespace llvm {
+
+#if defined(log2)
+# undef log2
+#endif
 
 inline unsigned log2(uint64_t C) {
   unsigned getPow;
@@ -16,14 +29,31 @@ inline unsigned log2(uint64_t C) {
   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(C);
+    getPow = log2(static_cast<uint64_t>(C));
     return true;
   }
 
   return false;
 }
 
+// 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