[PATCH, BINUTILS, AARCH64, 4/9] Add Execution and Data Restriction instructions

[Sudakshina Das]

Hi

This patch is part of the patch series to add support for ARMv8.5-A
extensions.
(https://developer.arm.com/products/architecture/cpu-architecture/a-profile/docs/ddi0596/a/a64-base-instructions-alphabetic-order)

This patch adds the prediction restriction instructions (that is, cfp,
dvp, cpp). These instructions are retrospectively made optional for all
versions of the architecture from ARMv8.0 to ARMv8.4 and is mandatory
from ARMv8.5. Hence adding a new +predres which can be used by the older
architectures.

Testing done: Builds and reg tests all pass on aarch64-none-linux-gnu
and aarch64-none-elf. Added new tests.

Ok for trunk?

Thanks
Sudi
PS. I do not have commit access so if OK can someone apply for me?
Also the patch was too big to attach due to the regenerated files.



*** include/ChangeLog ***

2018-xx-xx  Sudakshina Das  <sudi.das@arm.com>

           * opcode/aarch64.h (AARCH64_FEATURE_PREDRES): New.
           (AARCH64_ARCH_V8_5): Add AARCH64_FEATURE_PREDRES by default.
           (aarch64_opnd): Add AARCH64_OPND_SYSREG_SR.
           (aarch64_sys_regs_sr): Declare new table.

*** opcodes/ChangeLog ***

2018-xx-xx  Sudakshina Das  <sudi.das@arm.com>

           * aarch64-dis.c (aarch64_ext_sysins_op): Add case for
           AARCH64_OPND_SYSREG_SR.
           * aarch64-opc.c (aarch64_print_operand): Likewise.
           (aarch64_sys_regs_sr): Define table.
           (aarch64_sys_ins_reg_supported_p): Check for RCTX with
           AARCH64_FEATURE_PREDRES.
           * aarch64-tbl.h (aarch64_feature_predres): New.
           (PREDRES, PREDRES_INSN): New.
           (aarch64_opcode_table): Add entries for cfp, dvp and cpp.
           (AARCH64_OPERANDS): Add new description for SYSREG_SR.
           * aarch64-asm-2.c: Regenerate.
           * aarch64-dis-2.c: Regenerate.
           * aarch64-opc-2.c: Regenerate.

*** gas/ChangeLog ***

2018-xx-xx  Sudakshina Das  <sudi.das@arm.com>

           * config/tc-aarch64.c (aarch64_sys_regs_sr_hsh): New.
           (parse_operands): Add entry for AARCH64_OPND_SYSREG_SR.
           (md_begin): Allocate and initialize aarch64_sys_regs_sr_hsh
           with aarch64_sys_regs_sr.
           (aarch64_features): Add new "predres" option for older
           architectures.
	* doc/c-aarch64.texi: Document the same.
           * testsuite/gas/aarch64/sysreg-4.s: New.
           * testsuite/gas/aarch64/sysreg-4.d: New.
           * testsuite/gas/aarch64/illegal-sysreg-4.d: New.
           * testsuite/gas/aarch64/illegal-sysreg-4.l: New.
           * testsuite/gas/aarch64/predres.s: New.
           * testsuite/gas/aarch64/predres.d: New.


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