Function extract_unit_64

numpy/core/src/multiarray/datetime.c:43–55

* Computes the python `ret, d = divmod(d, unit)`. * * Note that GCC is smart enough at -O2 to eliminate the `if(*d < 0)` branch * for subsequent calls to this command - it is able to deduce that `*d >= 0`. */

 * for subsequent calls to this command - it is able to deduce that `*d >= 0`.
 */
static inline
npy_int64 extract_unit_64(npy_int64 *d, npy_int64 unit) {
    assert(unit > 0);
    npy_int64 div = *d / unit;
    npy_int64 mod = *d % unit;
    if (mod < 0) {
        mod += unit;
        div -= 1;
    }
    assert(mod >= 0);
    *d = mod;
    return div;
}

static inline
npy_int32 extract_unit_32(npy_int32 *d, npy_int32 unit) {