Changeset 8ca60e4 for src/Common

Timestamp:

Jan 25, 2024, 10:04:17 AM (11 months ago)

Author:

Andrew Beach <ajbeach@…>

Branches:

master

Children:

36e120a

Parents:

5764204

Message:

Remove ilog2, an unused math helper.

File:

• src/Common/utility.h (modified) (1 diff)

src/Common/utility.h

@@ -111 +111 @@
 };
 
-// -----------------------------------------------------------------------------
-// O(1) polymorphic integer ilog2, using clz, which returns the number of leading 0-bits, starting at the most
-// significant bit (single instruction on x86)
-
-template<typename T>
-inline
-#if defined(__GNUC__) && __GNUC__ > 4
-constexpr
-#endif
-T ilog2(const T & t) {
-        if(std::is_integral<T>::value) {
-                const constexpr int r = sizeof(t) * __CHAR_BIT__ - 1;
-                if( sizeof(T) == sizeof(unsigned       int) ) return r - __builtin_clz  ( t );
-                if( sizeof(T) == sizeof(unsigned      long) ) return r - __builtin_clzl ( t );
-                if( sizeof(T) == sizeof(unsigned long long) ) return r - __builtin_clzll( t );
-        }
-        assert(false);
-        return -1;
-} // ilog2
-
 // Local Variables: //
 // tab-width: 4 //