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Re: PPro patch for egcs
- To: john at feith dot com (John Wehle)
- Subject: Re: PPro patch for egcs
- From: hjl at lucon dot org (H.J. Lu)
- Date: Thu, 4 Jun 1998 20:06:22 -0700 (PDT)
- Cc: law at cygnus dot com, egcs-patches at cygnus dot com
> > +
>
> I think that you misunderstood my comment. The problem is that the
> Intel floating point conditional move instructions are not capable
> of checking the overflow bit. This prevents them from being used
> in situtations requiring signed integer comparisons. I've submitted
> a patch to prevent them from being used in this situation.
>
I think there may be a better way than disabling the signed integer
comparisons for floating point conditional move all together. We may
be able to translate CC into something fcmovxx can handle like what I
did for fcomi. But it may require changes in other places in the x86
backend. I will give it a try this weekend.
--
H.J. Lu (hjl@gnu.org)