[PATCH], PowerPC long double transistion, patch #2

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

In addition to the previous patch to aid in transitioning the PowerPC long
double format to IEEE 128-bit, I have some additional patches that are needed.
The previous patch is:
https://gcc.gnu.org/ml/gcc-patches/2018-06/msg00634.html

This fixes some of the PowerPC tests that had implicit assumptions about the
long double format.  The fixes involved:

    1)	Using long double __complex instead of using a KC attribute;
    2)	Explicitly adding -mabi=ibmlongdouble; (or)
    3)	Using __ibm128 instead of long double if long double is IEEE 128-bit.

I have done separate bootstraps on a little endian power8 system with the long
double type set to IBM extended and IEEE 128-bit extended.  There were no
regressions in using this patch, and it fixes several of the errors when you
use a compiler with long double defaulting to IEEE 128-bit floating point.  Can
I check it in, and eventually back port it to GCC 8.2 with the other long
double transition patches.

2018-06-13  Michael Meissner  <meissner@linux.ibm.com>

	* gcc.target/powerpc/divkc3-1.c: If long double is IEEE 128-bit,
	use __complex long double instead of KC attribute.
	* gcc.target/powerpc/mulkc3-1.c: Likewise.
	* gcc.target/powerpc/float128-3.c: Add -mabi=ibmlongdouble to
	tests that require long double to be IBM extended double.
	* gcc.target/powerpc/float128-5.c: Likewise.
	* gcc.target/powerpc/float128-mix.c: Likewise.
	* gcc.target/powerpc/pack02.c: On systems where long double is
	IEEE 128-bit, use __ibm128 instead of long double.  Use the ibm128
	pack/unpack functions instead of the long double pack/unpack
	functions.
	* gcc.target/powerpc/pr57150.c: Likewise.
	* gcc.target/powerpc/pr60203.c: Likewise.
	* gcc.target/powerpc/pr67808.c: Likewise.
	* gcc.target/powerpc/pr70117.c: Likewise.
	* gcc.target/powerpc/tfmode_off.c: Likewise.

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

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