[09/12] Add fesetexcept: powerpc

[Joseph Myers]

On Fri, 12 Aug 2016, Paul E. Murphy wrote:

> > +  n.l = (u.l
> > +	 | (excepts & FPSCR_STICKY_BITS)
> > +	 | (excepts >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT))
> > +	    & FE_INVALID_SOFTWARE));
> 
> This should also preserve a comment about transforming
> FE_INVALID into FE_INVALID_SOFTWARE.  Otherwise, this patch
> looks OK to me.

I don't see such a comment in sysdeps/powerpc/fpu/fsetexcptflg.c to 
preserve (all these function implementations follow those of 
fesetexceptflag).  I did preserve the comment "Deal with 
FE_INVALID_SOFTWARE not being implemented on some chips." (while trying 
not to duplicate all the completely routine comments in various 
fesetexceptflag implementations that say no more than repeating the plain 
semantics of individual lines of C code).

-- 
Joseph S. Myers
joseph@codesourcery.com