base: Tag API methods in intmath.hh

Change-Id: Ia50830c7620380ff2aba081f56f74822aff982bf
Signed-off-by: Hoa Nguyen <hoanguyen@ucdavis.edu>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33075
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
diff --git a/src/base/intmath.hh b/src/base/intmath.hh
index 3713ae6..daf5f5d 100644
--- a/src/base/intmath.hh
+++ b/src/base/intmath.hh
@@ -36,6 +36,9 @@
 #include "base/logging.hh"
 #include "base/types.hh"
 
+/**
+ * @ingroup api_base_utils
+ */
 inline uint64_t
 power(uint32_t n, uint32_t e)
 {
@@ -52,6 +55,9 @@
     return result;
 }
 
+/**
+ * @ingroup api_base_utils
+ */
 template <class T>
 inline typename std::enable_if<std::is_integral<T>::value, int>::type
 floorLog2(T x)
@@ -74,6 +80,9 @@
     return y;
 }
 
+/**
+ * @ingroup api_base_utils
+ */
 template <class T>
 inline int
 ceilLog2(const T& n)
@@ -85,6 +94,9 @@
     return floorLog2(n - (T)1) + 1;
 }
 
+/**
+ * @ingroup api_base_utils
+ */
 template <class T>
 inline bool
 isPowerOf2(const T& n)
@@ -94,6 +106,9 @@
     return n && !(n & (n - 1));
 }
 
+/**
+ * @ingroup api_base_utils
+ */
 template <class T, class U>
 inline T
 divCeil(const T& a, const U& b)
@@ -108,7 +123,9 @@
  * @param align is the alignment. Can only be a power of 2.
  * @return The aligned address. The smallest number divisible
  * by @param align which is greater than or equal to @param val.
-*/
+ *
+ * @ingroup api_base_utils
+ */
 template <class T, class U>
 inline T
 roundUp(const T& val, const U& align)
@@ -125,7 +142,9 @@
  * @param align is the alignment. Can only be a power of 2.
  * @return The aligned address. The biggest number divisible
  * by @param align which is less than or equal to @param val.
-*/
+ *
+ * @ingroup api_base_utils
+ */
 template <class T, class U>
 inline T
 roundDown(const T& val, const U& align)