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Thomas Preud'homme 3d030cdb4a [ARM] Allow Thumb division as an extension for ARMv7
=== Context ===

This patch is part of a patch series to add support for ARMv8-R
architecture. Its purpose is to allow ARMv7 to be selected in automatic
architecture selection in presence of Thumb division instructions.

=== Motivation ===

any-idiv.d and automatic-sdiv.d testcases in GAS testsuite expect
autodetection code to select ARMv7 in presence of Thumb integer
division. However, the definition of ARM_AEXT_V7 and thus ARM_ARCH_V7 do
not contain these instructions and the idiv extension is only available
for ARMv7-A and ARMv7-R. Therefore, under the stricter automatic
detection code proposed in the subsequent patch of the series ARMv7 is
refused if a Thumb division instruction is present.

=== Patch description ===

This patch adds a new "idiv" extension after the existing one that is
available to all ARMv7 targets. This new entry is ignored by all current
code parsing arm_extensions such that it would be unavailable on the
command-line and remain a purely internal hack, easily removed in favor
of a better solution later. This is considered though by the subsequent
patch reworking automatic detection of build attributes such that ARMv7
is allowed to match in present of Thumb division instructions. For good
measure, comments are added in all instances of code browsing
arm_extensions to mention the expected behavior in case of duplicate
entries as well as a new testcase.

2017-06-20  Thomas Preud'homme  <thomas.preudhomme@arm.com>

gas/
	* config/tc-arm.c (arm_extensions): New duplicate idiv entry to enable
	Thumb division for ARMv7 architecture.
	(arm_parse_extension): Document expected behavior for duplicate
	entries.
	(s_arm_arch_extension): Likewise.
	* testsuite/gas/arm/forbid-armv7-idiv-ext.d: New test.
	* testsuite/gas/arm/forbid-armv7-idiv-ext.l: New expected output for
	above test.
2017-06-21 15:08:49 +01:00
bfd PowerPC64 localentry:0 plt calls 2017-06-21 22:45:15 +09:30
binutils Fix address violation when attempting to display disassembled data. 2017-06-19 15:57:19 +01:00
config
cpu
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gas [ARM] Allow Thumb division as an extension for ARMv7 2017-06-21 15:08:49 +01:00
gdb Change to_xfer_partial doc to use addressable memory units 2017-06-21 13:16:47 +02:00
gold [GOLD] PowerPC move plt indx_ out of unordered map key 2017-06-21 22:45:15 +09:30
gprof
include Rewrite __start and __stop symbol handling 2017-06-16 23:38:28 +09:30
intl
ld PowerPC64 tocsave testcases 2017-06-21 22:45:15 +09:30
libdecnumber
libiberty
opcodes Prevent address violation when attempting to disassemble a corrupt score binary. 2017-06-19 14:15:57 +01:00
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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.