Function BigInt_Set_2x_uint64

numpy/core/src/multiarray/dragon4.c:224–254

     defined(HAVE_LDOUBLE_IEEE_QUAD_LE) || \
     defined(HAVE_LDOUBLE_IEEE_QUAD_BE))
static void
BigInt_Set_2x_uint64(BigInt *i, npy_uint64 hi, npy_uint64 lo)
{
    if (hi > bitmask_u64(32)) {
        i->length = 4;
    }
    else if (hi != 0) {
        i->length = 3;
    }
    else if (lo > bitmask_u64(32)) {
        i->length = 2;
    }
    else if (lo != 0) {
        i->length = 1;
    }
    else {
        i->length = 0;
    }

    /* Note deliberate fallthrough in this switch */
    switch (i->length) {
        case 4:
            i->blocks[3] = (hi >> 32) & bitmask_u64(32);
        case 3:
            i->blocks[2] = hi & bitmask_u64(32);
        case 2:
            i->blocks[1] = (lo >> 32) & bitmask_u64(32);
        case 1:
            i->blocks[0] = lo & bitmask_u64(32);
    }
}
#endif /* DOUBLE_DOUBLE and QUAD */

static void