Function mi_bsr

3rd/mimalloc-2.0.9/include/mimalloc-internal.h:1038–1040

"bit scan reverse": Return index of the highest bit (or MI_INTPTR_BITS if `x` is zero)

// "bit scan reverse": Return index of the highest bit (or MI_INTPTR_BITS if `x` is zero)
static inline size_t mi_bsr(uintptr_t x) {
  return (x==0 ? MI_INTPTR_BITS : MI_INTPTR_BITS - 1 - mi_clz(x));
}


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