Hi! On Thu, Jan 30, 2020 at 11:19:18AM +0100, Henri Cloetens wrote: > - It is indeed true subreg only works on bytes. > - So, I changed the declaration: > a. I declared all 12 condition code bits as BYTES (QI) That's not going to work. The separate 3-bit fields are still at offsets 0, 3, 6, 9 bit. You cannot use subregs to access them. > b. I split it in 4 CC fields (cfr below), and declared each of these > as SI. Why not as CCmode? That's what they are, after all. > - Then, the compare addresses the CC field in SI mode, the branch in QI > mode, and all goes well. I mean, it does not matter if I declare SI > or BI, because > the compare instruction only writes 0 or 1, and the branch > instruction tests only > for 0 or 1. Or do the compare insns only set single bits? Not (e.g.) all of "less than", "equal to", "greater than" at once? Segher
