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Fix an assertion failure like: test.s: Assembler messages: test.s:3: Internal error! Assertion failure in append_insn at .../gas/config/tc-mips.c:7523. Please report this bug. triggered by assembling MIPS16 code like: hello: addiu $4, $4, 4 jr $31 with the generation of a listing file enabled, e.g.: $ as -mips16 -O2 -aln=test.lst The cause of the problem is the lack of support for moving instructions across frags in MIPS16 jump swapping, which triggers more easily with listing enabled as in that case every instruction gets placed in its own frag. It would trigger even with listing disabled though if the instruction to swap a MIPS16 jump with was unfortunately enough placed as last in a frag that became full. This scenario is already handled correctly with branch swapping in regular MIPS and microMIPS code, so reuse it for MIPS16 code as well, and now that all MIPS16 handling has become the same as the regular MIPS and microMIPS cases remove MIPS16 special casing altogether. This effectively complements: commit 464ab0e55ade01d2bb0b4fa45c429af7a2f85a26 Author: Maciej W. Rozycki <macro@linux-mips.org> Date: Mon Aug 6 20:33:00 2012 +0000 <https://sourceware.org/ml/binutils/2012-08/msg00043.html>, ("MIPS/GAS: Correct microMIPS branch swapping assertion") for the MIPS16 case. The assertion itself was introduced with: commit 1e91584932efd70020c8c98037d0cb93a0552a20 Author: Richard Sandiford <rdsandiford@googlemail.com> Date: Wed Mar 9 09:17:02 2005 +0000 <https://sourceware.org/ml/binutils/2005-03/msg00217.html>, ("Rework MIPS nop-insertion code, add -mfix-vr4130 [5/11]"), but its introduction merely noted our existing lack of support for MIPS16 jump swapping across frags. gas/ * config/tc-mips.c (append_insn) <APPEND_SWAP>: Do not special case MIPS16 handling. * testsuite/gas/mips/branch-swap-3.d: New test. * testsuite/gas/mips/branch-swap-4.d: New test. * testsuite/gas/mips/mips16@branch-swap-3.d: New test. * testsuite/gas/mips/mips16@branch-swap-4.d: New test. * testsuite/gas/mips/micromips@branch-swap-3.d: New test. * testsuite/gas/mips/micromips@branch-swap-4.d: New test. * testsuite/gas/mips/branch-swap-3.s: New test source. * testsuite/gas/mips/mips.exp: Run the new tests.
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.