[patch] rtlopt branch merge part 6 - speed improvement of branch predictions

Jan Hubicka jh@suse.cz
Fri Feb 7 10:54:00 GMT 2003


> On Mon, Feb 03, 2003 at 11:18:19AM +0100, Josef Zlomek wrote:
> > 	* Makefile.in (sreal.o): Added.
> > 	(predict.o): Depends on sreal.h instead of real.h.
> > 	* sreal.c: New file.
> > 	* sreal.h: New file.
> > 	* predict.c: Use sreal.c instead of real.c.
> 
> I wonder if the following would be better.  Thoughts?

I was playing around with this, but this fails when the underlying FP
implementation changes - ie x87 math has double rounding even with
volitales everywhere and you get different results when you bootstrap
using x87 compiler compiler that uses SSE math.

Honza



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