On Mon, Nov 23, 2015 at 07:04:33PM -0500, David Edelsohn wrote:
> I would prefer that you reverse the meaning of "Fv" and "Fv2".  "Fv"
> corresponds to VSX2 and "Fv2" corresponds to VSX, which is confusing
> for anyone trying to make sense of this in the future.
> 
> Also, the lround<mode>di2 pattern should use "Fv" not "wa" from my
> original patch.  And the ChangeLog entry should list lround<mode>di2.
> 
> Okay with those changes, after the cause of the SEGV is diagnosed and fixed.

I checked in the following patch.  Note, the segfault is independent of the
patch.  I will look into it shortly.

I will back port this patch to GCC 5 as we discussed.

2015-11-24  David Edelsohn  <dje.gcc@gmail.com>
	    Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000.md (UNSPEC_XSRDPI): New unspec.
	(Fv2): New mode attribute to be used when ISA 2.06 instructions
	are used on SF/DF values.
	(abs<mode>2_fpr): Use <Fv2> instead of <Fv>.
	(nabs<mode>2_fpr): Likewise.
	(neg<mode>2_fpr): Likewise.
	(copysign<mode>3_fcpsgn): Likewise.
	(smax<mode>3_vsx): Likewise.
	(smin<mode>3_vsx): Likewise.
	(floatsi<mode>2_lfiwax): Likewise.
	(floatunssi<mode>2_lfiwz): Likewise.
	(fctiwz_<mode>): Likewise.
	(fctiwuz_<mode>): Likewise.
	(btrunc<mode>2): Likewise.
	(ceil<mode>2): Likewise.
	(floor<mode>2): Likewise.
	(xsrdpi<mode>): Add support for the lround function.
	(lround<mode>di2): Likewise.

-- 
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meissner@linux.vnet.ibm.com, phone: +1 (978) 899-4797