tmp = bitfield_unsigned_read(ptr, srcpos.mantissa_start,
src->mantissa_len - 1, src->byte_order);
bitfield_unsigned_write(&u.bits, destpos.mantissa_start,
tmp = bitfield_unsigned_read(ptr, srcpos.mantissa_start,
src->mantissa_len - 1, src->byte_order);
bitfield_unsigned_write(&u.bits, destpos.mantissa_start,