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Tamar Christina a68f4cd235 AArch64: Add SVE constraints verifier.
This patch adds the verification rules for move prefix constraints.

The Arm SVE instruction MOVPRFX introduces[1] constraints on the instruction at
PC+4. Particularly the following constraints are handled by this patch

* MOVPRFX must be followed by an instruction.
* MOVPRFX can only be followed by non-layout altering directives.
* MOVPRFX destination register MUST be used as the destination register in the
  instruction at PC+4, and is not allowed to be used in any other position other than
  destructive input.  This includes registers that architecturally overlap. e.g. x1
  should be treated as z1.
* MOVPRFX must be followed by a restricted set of SVE instructions.
* The size of the destination register of MOVPRFX must be equal to that of
  the operation at PC+4.
* The predicate register and operation of MOVPRFX must match that of the instruction
  at PC+4
* The predicated instruction at PC+4 must use the merging predicate.
* Architectural aliases and pseudo-instructions need to be supported as well.
* MOVPRFX cannot be the last instruction in a sequence

Any failure to adhere to any of these constrains will emit an assembly warning
and a disassembly note.

[1] https://developer.arm.com/docs/ddi0584/latest/arm-architecture-reference-manual-supplement-the-scalable-vector-extension-sve-for-armv8-a

include/

	* opcode/aarch64.h (aarch64_inst): Remove.
	(enum err_type): Add ERR_VFI.
	(aarch64_is_destructive_by_operands): New.
	(init_insn_sequence): New.
	(aarch64_decode_insn): Remove param name.

opcodes/

	* aarch64-opc.c (init_insn_block): New.
	(verify_constraints, aarch64_is_destructive_by_operands): New.
	* aarch64-opc.h (verify_constraints): New.

gas/

        * config/tc-aarch64.c (output_operand_error_report): Order warnings.
2018-10-03 18:49:37 +01:00
bfd Fix the handling of inlined frames in DWARF debug info. 2018-10-03 12:06:09 +01:00
binutils Updated French translation for the binutils/ subdirectory. 2018-10-03 11:36:11 +01:00
config
contrib
cpu
elfcpp
etc
gas AArch64: Add SVE constraints verifier. 2018-10-03 18:49:37 +01:00
gdb Skip gdb ifunc tests on targets that don't support this feature. 2018-10-03 09:16:53 -07:00
gold
gprof Fix typo setting user_specified variable when parsing -Z option. 2018-10-01 17:18:20 +01:00
include AArch64: Add SVE constraints verifier. 2018-10-03 18:49:37 +01:00
intl
ld Couple of minor tweaks to the linker testsuite. 2018-09-25 08:15:36 +02:00
libdecnumber
libiberty
opcodes AArch64: Add SVE constraints verifier. 2018-10-03 18:49:37 +01:00
readline
sim Change "xor" name in cpu_core to allow building with iso646.h or C++ compiler 2018-09-28 16:00:46 -04:00
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depcomp
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ltmain.sh
ltoptions.m4
ltsugar.m4
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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.