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Re: Making -ffast-math more fine-grained?
- From: Roger Sayle <roger at eyesopen dot com>
- To: Andrew Pinski <pinskia at physics dot uc dot edu>, Nathanael Nerode <neroden at twcny dot rr dot com>
- Cc: gcc at gcc dot gnu dot org
- Date: Wed, 24 Mar 2004 06:23:37 -0700 (MST)
- Subject: Re: Making -ffast-math more fine-grained?
On Tue, 23 Mar 2004, Andrew Pinski wrote:
> I thought we have already have some of these flags already, yes we do:
An excellent review of -ffast-math!
> On Mar 23, 2004, at 21:20, Nathanael Nerode wrote:
> > 1 * Ones which allow excess precision computations (these really
> > should be OK for most people, though not for testsuites).
>
> Done by default on targets which support 80bit math as faster than
> 64bit would. I do not think this is going to change any time soon.
This one's command line option is called -ffloat-store, but its neither
enabled nor disabled by -ffast-math, as -fno-float-store is the default.
I appreciate Andrew was listing the fine-grained options of -ffast-math,
but all of Nethanael's categories of transformation are independently
controllable.
Roger
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