ref: bbfee60f6716dce8cf7a802c044cf7d0fe8bb6f2 dir: /src/plan9/clz.c/
#include "platform.h" int sl_clz(u32int x) { u32int r; if(x == 0) return 32; for(r = 0; (x & (1UL<<31)) == 0; x <<= 1, r++); return r; }