ref: f83efa2aed9e735236eb862c99aa6eb33d6fc0e5 dir: /src/plan9/clz.c/
#include "platform.h" int fl_clz(uint32_t x) { uint32_t r; if(x == 0) return 32; for(r = 0; (x & (1UL<<31)) == 0; x <<= 1, r++); return r; }