ref: 12c9d2fc728b51aa1eb9a70d0d331eb9464912d9 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; }