> > What are GET_MODE_BITSIZE and GET_MODE_PRECISION for PSImode? > > It *should* be 20 and 20 for msp430. But GET_MODE_BITSIZE returns 32, > because it's a macro that does GET_MODE_SIZE * BITS_PER_UNIT, so it > cannot return 20.
No, it should not be 20, mode sizes are multiple of the unit, you're mixing precision and size. I doubt the hardware accesses 20 bits, more probably 24 or 32 bits, so the mode size cannot be 20 bits. > GCC typically uses size for "fits in a" tests. Then change them to use the precision when this matters, the wide-int folks have already changed them in a few places but that's probably not sufficient. -- Eric Botcazou
