Question about conditional functional unit reservation

[Richard Braun]

On Thu, Nov 06, 2025 at 10:40:28AM +0100, Richard Braun wrote:
> On Thu, Nov 06, 2025 at 09:50:24AM +0300, Alexander Monakov wrote:
> > Try define_bypass (it's "common" use is for situations where latency
> > between instructions A and B is shorter than A would have otherwise,
> > but using it for longer exceptional latency should work as well).
> 
> I've looked at define_bypass, but my problem is that, according to
> its description, it only applies to instructions with data dependency,
> not functional unit (or reservation) conflicts. Am I wrong about that ?

I'm posting my replies to Benoit Dinechin, which include his suggestions,
which were not Cc'd to the list because of IT issues, AIUI.

-- 
Richard Braun