From 8ed4f0a02cd936f717f5af0c15b64fedddd5af54 Mon Sep 17 00:00:00 2001
From: Ali Saidi <Ali.Saidi@arm.com>
Date: Mon, 23 Aug 2010 11:18:40 -0500
Subject: ARM: Add I/O devices for booting linux

--HG--
rename : src/dev/arm/Versatile.py => src/dev/arm/RealView.py
rename : src/dev/arm/versatile.cc => src/dev/arm/realview.cc
rename : src/dev/arm/versatile.hh => src/dev/arm/realview.hh
---
 src/base/intmath.hh | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'src/base')

diff --git a/src/base/intmath.hh b/src/base/intmath.hh
index a2960e750..b8c83f05a 100644
--- a/src/base/intmath.hh
+++ b/src/base/intmath.hh
@@ -33,6 +33,7 @@
 
 #include <cassert>
 
+#include "base/misc.hh"
 #include "base/types.hh"
 
 // Returns the prime number one less than n.
@@ -74,6 +75,27 @@ isPowerOf2(T n)
     return n != 0 && leastSigBit(n) == n;
 }
 
+inline uint64_t
+power(uint32_t n, uint32_t e)
+{
+    if (e > 20)
+        warn("Warning, power() function is quite slow for large exponents\n");
+
+    if (e == 0)
+        return 1;
+
+    uint64_t result = n;
+    uint64_t old_result = 0;
+    for (int x = 1; x < e; x++) {
+        old_result = result;
+        result *= n;
+        if (old_result > result)
+            warn("power() overflowed!\n");
+    }
+    return result;
+}
+
+
 inline int
 floorLog2(unsigned x)
 {
-- 
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