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This leverages commit ("s390: Simplify (dis)assembly of insn operands with const bits") to relax the operand constraints of the immediate operand that contains the constant Z- or T-bit of the following extended mnemonics: risbgz, risbgnz, risbhgz, risblgz, rnsbgt, rosbgt, rxsbgt Previously those instructions were the only ones where the assembler on s390 restricted the specification of the subject I3/I4 operand values exactly according to their specification to an unsigned 6- or 5-bit unsigned integer. For any other instructions the assembler allows to specify any operand value allowed by the instruction format, regardless of whether the instruction specification is more restrictive. Allow to specify the subject I3/I4 operand as unsigned 8-bit integer with the constant operand bits being ORed during assembly. Relax the instructions subject significant operand bit masks to only consider the Z/T-bit as significant, so that the instructions get disassembled as their *z or *t flavor regardless of whether any reserved bits are set in addition to the Z/T-bit. Adapt the rnsbg, rosbg, and rxsbg test cases not to inadvertently set the T-bit in operand I3, as they otherwise get disassembled as their rnsbgt, rosbgt, and rxsbgt counterpart. This aligns GNU Assembler to LLVM Assembler. opcodes/ * s390-opc.c (U6_18, U5_27, U6_26): Remove. (INSTR_RIE_RRUUU2, INSTR_RIE_RRUUU3, INSTR_RIE_RRUUU4): Define as INSTR_RIE_RRUUU while retaining insn fmt mask. (MASK_RIE_RRUUU2, MASK_RIE_RRUUU3, MASK_RIE_RRUUU4): Treat only Z/T-bit of I3/I4 operand as significant. gas/testsuite/ * gas/s390/zarch-z10.s (rnsbg, rosbg, rxsbg): Do not set T-bit. Reported-by: Dominik Steenken <dost@de.ibm.com> Suggested-by: Ulrich Weigand <ulrich.weigand@de.ibm.com> Signed-off-by: Jens Remus <jremus@linux.ibm.com> (cherry picked from commit b8b60e2d0cb0ab1f235f082dbb8a4e8bc43aadf6)
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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.
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