Re: [PATCH] lround for PowerPC

[Michael Meissner <meissner at linux dot vnet dot ibm dot com>]

David ping'ed me on internal IRC, and I had a thinko in terms of the use of the
<Fv> mode attribute.  In some of the uses (such as abs, smax, etc.) we want to
use ISA 2.06 instructions on SFmode, while in other uses (add, mul, etc.) we
want to use it only if we have the ISA 2.07 instrucitons.

I have split these mode attributes into Fv and Fv2 and gone through all of the
uses in the compiler to use the appropriate attribute.  I have built a cross
compiler on x86, but it blew up on a big endian power7 with a segmentation
violation that I need to look into.  I'm also building on a little endian
power8 right now, and it has gotten further.

2015-11-23  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>2): 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

Attachment: lround.patch02b
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