/*@{*/
-#ifndef HAVE___BUILTIN_FFS
-/**
- * Find the first bit set in a word.
- */
-int
-ffs(int i)
-{
- register int bit = 0;
- if (i != 0) {
- if ((i & 0xffff) == 0) {
- bit += 16;
- i >>= 16;
- }
- if ((i & 0xff) == 0) {
- bit += 8;
- i >>= 8;
- }
- if ((i & 0xf) == 0) {
- bit += 4;
- i >>= 4;
- }
- while ((i & 1) == 0) {
- bit++;
- i >>= 1;
- }
- bit++;
- }
- return bit;
-}
-#endif
-
-#ifndef HAVE___BUILTIN_FFSLL
-/**
- * Find position of first bit set in given value.
- * XXX Warning: this function can only be used on 64-bit systems!
- * \return position of least-significant bit set, starting at 1, return zero
- * if no bits set.
- */
-int
-ffsll(long long int val)
-{
- int bit;
-
- STATIC_ASSERT(sizeof(val) == 8);
-
- bit = ffs((int) val);
- if (bit != 0)
- return bit;
-
- bit = ffs((int) (val >> 32));
- if (bit != 0)
- return 32 + bit;
-
- return 0;
-}
-#endif
-
-
#ifndef HAVE___BUILTIN_POPCOUNT
/**
* Return number of bits set in given GLuint.