fixedPointLeadingZeros()

FL_FIXED_POINT_DIVIDE_INLINE int fl::detail::fixedPointLeadingZeros

(

u32

value

)

Leading zeros of a non-zero 32-bit value; 32 for zero.

Definition at line 86 of file wide_divide.h.

                                                                                {
#if defined(__GNUC__) || defined(__clang__)
    // One CLZ instruction on every core this file's fast path is enabled for.
    return value == 0 ? 32 : __builtin_clz(value);
#else
    int count = 0;
    while (count < 32 && (value & 0x80000000u) == 0u) {
        value <<= 1;
        ++count;
    }
    return count;
#endif
}

References FL_FIXED_POINT_DIVIDE_INLINE, fl::FL_NO_EXCEPT, and fl::type_rank< T >::value.

Referenced by fl::divide64By32().

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