On 11/12/18 3:34 PM, Peter Maydell wrote: >> The other id_aa64* register fields are all extensions to v8.0, so they should >> be zero. I am of course assuming that AdvSIMD is present, otherwise qemu >> itself probably have failed before now. > > You don't set the id_isar* to say "AdvSIMD present" (or "VFP present"), > though.
Those two are almost unique in that they are signed fields. So 0 indicates present and -1 indicates not present (and 1 indicates fp16 support). r~
