From 1092515e6551b3967226f0ff21b2a74236330932 Mon Sep 17 00:00:00 2001
From: Nathan Binkert <binkertn@umich.edu>
Date: Fri, 10 Oct 2003 09:44:49 -0400
Subject: Rename intmath.h to intmath.hh clean up the formatting make things
 use templates since this is C++ now.

base/circlebuf.cc:
base/intmath.cc:
base/intmath.hh:
base/range.hh:
base/remote_gdb.cc:
base/statistics.cc:
base/str.cc:
    intmath.h -> intmath.hh
base/intmath.hh:
    Make this more like C++ by templatizing these functions

--HG--
rename : base/intmath.h => base/intmath.hh
extra : convert_revision : 8f9b14de9db751b1bd78588c51613d77afd96989
---
 base/intmath.hh | 145 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 base/intmath.hh

(limited to 'base/intmath.hh')

diff --git a/base/intmath.hh b/base/intmath.hh
new file mode 100644
index 000000000..16467426d
--- /dev/null
+++ b/base/intmath.hh
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2003 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __INTMATH_HH__
+#define __INTMATH_HH__
+
+// Returns the prime number one less than n.
+int PrevPrime(int n);
+
+// Determine if a number is prime
+template <class T>
+inline bool
+IsPrime(T n)
+{
+    T i;
+
+    if (n == 2 || n == 3)
+        return true;
+
+    // Don't try every odd number to prove if it is a prime.
+    // Toggle between every 2nd and 4th number.
+    // (This is because every 6th odd number is divisible by 3.)
+    for (i = 5; i*i <= n; i += 6) {
+        if (((n % i) == 0 ) || ((n % (i + 2)) == 0) ) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+template <class T>
+inline T
+LeastSigBit(T n)
+{
+    return n & ~(n - 1);
+}
+
+template <class T>
+inline bool
+IsPowerOf2(T n)
+{
+    return n != 0 && LeastSigBit(n) == n;
+}
+
+template <class T>
+inline int
+FloorLog2(T x)
+{
+    if (x == 0)
+        return -1;
+
+    int y = 0;
+
+    if (x & 0xffff0000) { y += 16; x >>= 16; }
+    if (x & 0x0000ff00) { y +=  8; x >>=  8; }
+    if (x & 0x000000f0) { y +=  4; x >>=  4; }
+    if (x & 0x0000000c) { y +=  2; x >>=  2; }
+    if (x & 0x00000002) { y +=  1; }
+
+    return y;
+}
+
+template <class T>
+inline int
+CeilLog2(T n)
+{
+    return FloorLog2(n - 1) + 1;
+}
+
+template <class T>
+inline T
+FloorPow2(T n)
+{
+    return (T)1 << FloorLog2(n);
+}
+
+template <class T>
+inline T
+CeilPow2(T n)
+{
+    return (T)1 << CeilLog2(n);
+}
+
+inline bool
+IsHex(char c)
+{
+    return c >= '0' && c <= '9' ||
+        c >= 'A' && c <= 'F' ||
+        c >= 'a' && c <= 'f';
+}
+
+inline bool
+IsOct(char c)
+{
+    return c >= '0' && c <= '7';
+}
+
+inline bool
+IsDec(char c)
+{
+    return c >= '0' && c <= '9';
+}
+
+inline int
+Hex2Int(char c)
+{
+  if (c >= '0' && c <= '9')
+    return (c - '0');
+
+  if(c >= 'A' && c <= 'F')
+    return (c - 'A') + 10;
+
+  if (c >= 'a' && c <= 'f')
+    return (c - 'a') + 10;
+
+  return 0;
+}
+
+#endif // __INTMATH_HH__
-- 
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