<juzhe.zh...@rivai.ai> writes: > ARM SVE has：svint8_t, svint8x2_t, svint8x3_t, svint8x4_t > As far as I known, they don't have tuple type for partial vector.
Yeah, there are no separate types for partial vectors, but there are separate modes. E.g. VNx2QI is a partial vector of QIs, with each QI stored in a 64-bit container. I agree with all the comments about the danger of growing the number of modes too much. But it looks like rtx_def should be easy to rearrange. Unless I'm missing something, there are less than 256 rtx codes at present. So one simple option would be to make the code 8 bits and the machine_mode 16 bits (and swap them, so that they stay well-aligned wrt their size). That of course would create new problem if we want more than 256 codes in future. But then there would be the option of a non-power-of-2 split (12/12 or whatever). Also, it's possible to multiplex operations into a single code by adding an extra operand, whereas it's harder to multiplex modes. Thanks, Richard
