Re: PATCH: target/23360: -ffast-math startup broken on i686 (maybeAthlon-xp)

[James E Wilson <wilson at specifix dot com>]

H. J. Lu wrote:
> +      if (fxsave.mxcsr_mask & MXCSR_DAZ)
> +	{
> +	  unsigned int mxcsr = __builtin_ia32_stmxcsr ();
> +	  mxcsr |= MXCSR_DAZ | MXCSR_FTZ;
> +	  __builtin_ia32_ldmxcsr (mxcsr);
> +	}

You can still use FTZ even if DAZ does not exist.  And I would expect 
that FTZ gives far more benefit than DAZ, so it doesn't make sense to 
make this setting conditional on the existence of the DAZ bit.

Otherwise this looks OK to me.
--
Jim Wilson, GNU Tools Support, http://www.specifix.com