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=== 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. |
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config | ||
cpu | ||
elfcpp | ||
etc | ||
gas | ||
gdb | ||
gold | ||
gprof | ||
include | ||
intl | ||
ld | ||
libdecnumber | ||
libiberty | ||
opcodes | ||
readline | ||
sim | ||
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compile | ||
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config.guess | ||
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configure | ||
configure.ac | ||
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COPYING.LIB | ||
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depcomp | ||
djunpack.bat | ||
install-sh | ||
libtool.m4 | ||
lt~obsolete.m4 | ||
ltgcc.m4 | ||
ltmain.sh | ||
ltoptions.m4 | ||
ltsugar.m4 | ||
ltversion.m4 | ||
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makefile.vms | ||
missing | ||
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move-if-change | ||
README | ||
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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.