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Ulrich Weigand ed0f427344 [PowerPC] Detect different long double floating-point formats
Current versions of GCC support switching the format used for "long double"
to either IBM double double or IEEE-128.  The resulting binary is marked
via different setting of the Tag_GNU_Power_ABI_FP GNU attribute.

This patch checks this attribute to detect the format of the default
"long double" type and sets GDB's notion of the format accordingly.

The patch also adds support for the "__ibm128" type, which always uses
IBM double double format independent of the format used for "long double".

A new test case verifies that all three types, "long double", "__float128",
and "__ibm128" are correctly detected in all three compiler settings,
the default setting, -mabi=ieeelongdouble, and -mabi=ibmlongdouble.

gdb/ChangeLog:
2017-11-21  Ulrich Weigand  <uweigand@de.ibm.com>

	* ppc-tdep.h (enum powerpc_long_double_abi): New data type.
	(struct gdbarch_tdep): New member long_double_abi.
	* rs6000-tdep.c (rs6000_gdbarch_init): Initialize long_double_abi
	member of tdep struct based on Tag_GNU_Power_ABI_FP attribute.
	* ppc-linux-tdep.c (ppc_linux_init_abi): Install long double data
	format depending on long_double_abi tdep member.
	(ppc_floatformat_for_type): Handle __ibm128 type.

gdb/testsuite/ChangeLog:
2017-11-21  Ulrich Weigand  <uweigand@de.ibm.com>

	* gdb.arch/ppc-longdouble.exp: New file.
	* gdb.arch/ppc-longdouble.c: Likewise.
2017-11-21 18:50:59 +01:00
bfd Add NULL bfd test to elf_symbol_from 2017-11-21 11:20:24 +10:30
binutils [ARC] [COMMITTED] Update test pattern patching. 2017-11-21 15:04:22 +01:00
config
cpu
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gas [ARC] Improve printing of pc-relative instructions. 2017-11-21 14:56:16 +01:00
gdb [PowerPC] Detect different long double floating-point formats 2017-11-21 18:50:59 +01:00
gold Fix typo in ChangeLog entry. 2017-11-19 18:02:31 -08:00
gprof
include Add new AArch64 FP16 FM{A|S} instructions. 2017-11-16 16:27:35 +00:00
intl Require ngettext in test of system gettext implementation 2017-11-07 15:56:44 +10:30
ld Stop the v850 linker from converting to other output formats whilst linking. 2017-11-21 14:15:51 +00:00
libdecnumber
libiberty
opcodes [ARC] Improve printing of pc-relative instructions. 2017-11-21 14:56:16 +01:00
readline
sim FT32: support for FT32B processor - part 2/2 2017-11-01 18:36:51 -07:00
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		   README for GNU development tools

This directory contains various GNU compilers, assemblers, linkers, 
debuggers, etc., plus their support routines, definitions, and documentation.

If you are receiving this as part of a GDB release, see the file gdb/README.
If with a binutils release, see binutils/README;  if with a libg++ release,
see libg++/README, etc.  That'll give you info about this
package -- supported targets, how to use it, how to report bugs, etc.

It is now possible to automatically configure and build a variety of
tools with one command.  To build all of the tools contained herein,
run the ``configure'' script here, e.g.:

	./configure 
	make

To install them (by default in /usr/local/bin, /usr/local/lib, etc),
then do:
	make install

(If the configure script can't determine your type of computer, give it
the name as an argument, for instance ``./configure sun4''.  You can
use the script ``config.sub'' to test whether a name is recognized; if
it is, config.sub translates it to a triplet specifying CPU, vendor,
and OS.)

If you have more than one compiler on your system, it is often best to
explicitly set CC in the environment before running configure, and to
also set CC when running make.  For example (assuming sh/bash/ksh):

	CC=gcc ./configure
	make

A similar example using csh:

	setenv CC gcc
	./configure
	make

Much of the code and documentation enclosed is copyright by
the Free Software Foundation, Inc.  See the file COPYING or
COPYING.LIB in the various directories, for a description of the
GNU General Public License terms under which you can copy the files.

REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info
on where and how to report problems.