[cairo] Flag for FP-challenged platforms

[Behdad Esfahbod]

On Mon, 2006-11-27 at 20:03 -0500, Daniel Amelang wrote:
> I've recently developed some optimizations in cairo that speed up
> platforms w/out an FPU, but slow down those that do. Carl has also
> mentioned being in this situation, and so I'm proposing a new
> configure option and flag. How do you all feel about the following
> proposed names?
> 
> --avoid-floating-point and AVOID_FLOATING_POINT
> --avoid-floats and AVOID_FLOATS
> --avoid-float and AVOID_FLOAT
> --avoid-float-operations and AVOID_FLOAT_OPERATIONS

Ok, jumping late on this thread.

What about --disable-fpu?  Or --disable-fast-floats.

behdad


> I'm shying away from --enable-embedded or the like, as I'd prefer the
> flag to describe the effect that it has on the code produced instead
> of describing the context where it is expected to be used.
> 
> Also, it would be nice to be able to guess this value for a given
> arch, but that's a little tricky. Like ARM with VFP would actually
> want to use FP, while ARM w/out VFP would not. I've seen people do
> this:
> 
> #if defined(__arm__) && !defined(__VFP__)
> 
> which I think would cover the one and only situation that we know of
> where cairo should avoid FP operations. Thoughts?
> 
> Dan
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-- 
behdad
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