[Morello] Capability sealing and unsealing instructions

[Morello] Capability sealing and unsealing instructions

- SEAL, UNSEAL

gas/ChangeLog:

2020-10-20  Siddhesh Poyarekar  <siddesh.poyarekar@arm.com>

	* config/tc-aarch64.c (parse_operands): Add FORM.
	* testsuite/gas/aarch64/morello_insn-c64.d: Add tests.
	* testsuite/gas/aarch64/morello_insn.d: Likewise.
	* testsuite/gas/aarch64/morello_insn.s: Likewise.

include/ChangeLog:

2020-10-20  Siddhesh Poyarekar  <siddesh.poyarekar@arm.com>

	* config/aarch64.h (aarch64_operand_class): Add FORM.
	(aarch64_opnd): Likewise.
	(aarch64_form): New struct.
	(aarch64_forms): New array.
	(get_form_from_value, get_form_from_str): New functions.
	(aarch64_opnd_info): New member FORM.

opcodes/ChangeLog:

2020-10-20  Siddhesh Poyarekar  <siddesh.poyarekar@arm.com>

	* aarch64-asm.c (aarch64_ins_form): New function.
	* aarch64-asm.h (ins_form): New function declaration.
	* aarch64-dis.c (aarch64_ext_form): New function.
	* aarch64-dis.h (ext_form): New function declaraion.
	* aarch64-opc.c (fields): New field form.
	(aarch64_forms): Initialise array.
	(get_form_from_value, get_form_from_str): New functions.
	(aarch64_print_operand): Add FORM.
	* aarch64-opc.h (aarch64_field_kind): Add FLD_form.
	* aarch64-tbl.h (aarch64_opcode_table): New instructions.
	(AARCH64_OPERANDS): New operands.
	* aarch64-asm-2.c: Regenerate.
	* aarch64-dis-2.c: Regenerate.
	* aarch64-opc-2.c: Regenerate.