On Wed, Nov 06, 2024 at 11:27:24AM +0000, Mark Rutland wrote: > > +#ifndef SSVE > > // And FFR > > wrffr p15.b > > #endif
> Both RDFFR and WRFFR are illegal in streaming mode unless FEAT_FA64 is > implemented and enabled, so we cannot use DRFFR in the SSVE case. Indeed, I'm surprised that managed to pass my testing... > Is there a different instruction we can use? We could just trash p0 with something like a load or add.
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