[PATCH, binutils, Arm] Add support for conditional instructions in Armv8.1-M Mainline

[Sudakshina Das]

Hi


This patch adds the following instructions which are part of the 
Armv8.1-M Mainline:
CINC
CINV
CNEG
CSINC
CSINV
CSNEG
CSET
CSETM
CSEL

Testing: Added new tests for the valid and invalid instructions 
operands. Testsuite shows no regression when run for arm-none-eabi targets.

Thanks
Sudi


ChangeLog entries are as follows :


*** gas/ChangeLog ***

2019-xx-xx  Sudakshina Das  <sudi.das@arm.com>

	* config/tc-arm.c (TOGGLE_BIT): New.
	(T16_32_TAB): New entries for cinc, cinv, cneg, csinc,
	csinv, csneg, cset, csetm and csel.
	(operand_parse_code): New OP_RR_ZR.
	(parse_operand): Handle case for OP_RR_ZR.
	(do_t_cond): New.
	(insns): New instructions for cinc, cinv, cneg, csinc,
	csinv, csneg, cset, csetm, csel.
	* testsuite/gas/arm/armv8_1-m-cond-bad.d: New test.
	* testsuite/gas/arm/armv8_1-m-cond-bad.l: New test.
	* testsuite/gas/arm/armv8_1-m-cond-bad.s: New test.
	* testsuite/gas/arm/armv8_1-m-cond.d: New test.
	* testsuite/gas/arm/armv8_1-m-cond.s: New test.

opcodes/ChangeLog:

2019-xx-xx  Sudakshina Das  <sudi.das@arm.com>

	* arm-dis.c (enum mve_instructions): New enum
	for csinc, csinv, csneg, csel, cset, csetm, cinv, cinv
	and cneg.
	(mve_opcodes): New instructions as above.
	(is_mve_encoding_conflict): Add cases for csinc, csinv,
	csneg and csel.
	(print_insn_mve): Accept new %<bitfield>c and %<bitfield>C.

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