COUNT_LEADING_ZEROS  102 lib/count-leading-zeros.h   COUNT_LEADING_ZEROS (__builtin_clz, _BitScanReverse, unsigned int);
COUNT_LEADING_ZEROS  109 lib/count-leading-zeros.h   COUNT_LEADING_ZEROS (__builtin_clzl, _BitScanReverse, unsigned long int);
COUNT_LEADING_ZEROS  125 lib/count-leading-zeros.h   COUNT_LEADING_ZEROS (__builtin_clzll, _BitScanReverse64,