> OK, how about: > > /* ??? For historical reasons, reject modes that would normally > receive greater alignment, even if unaligned accesses are > acceptable. This has both advantages and disadvantages.
Fine with me. > I think here we really do want unit (i.e. the GET_MODE_BITSIZE). > We're dividing the bitfield into unit-sized chunks and want to know > whether those chunks are aligned or not. If they aren't aligned, > we need to know whether unaligned accesses are OK. We could conceivably have an aligned mode with bitsize 32 and alignment 16 (i.e. STRICT_ALIGNMENT 1 and BIGGEST_ALIGNMENT 16), meaning that we can use 16-bit aligned 32-bit chunks in this mode. Why would the bitsize matter (assuming that it's a multiple of the alignment)? -- Eric Botcazou
