[binutils, ARM, 7/16] New BFX and BFLX instruction for Armv8.1-M Mainline

[binutils, ARM, 7/16] New BFX and BFLX instruction for Armv8.1-M Mainline

This patch is part of a series of patches to add support for Armv8.1-M Mainline instructions to binutils.

This patch adds the BFX and BFLX instructions.

ChangeLog entries are as follows :

*** gas/ChangeLog ***

2019-04-15  Sudakshina Das  <sudi.das@arm.com>

	* config/tc-arm.c (T16_32_TAB): New entries for bfx and bflx.
	(do_t_v8_1_branch): New switch cases for bfx and bflx.
	(insns): New instruction for bfx and bflx.
	* testsuite/gas/arm/armv8_1-m-bf-exchange.d: New.
	* testsuite/gas/arm/armv8_1-m-bf-exchange.s: New.
	* testsuite/gas/arm/armv8_1-m-bf-exchange-bad.s: New
	* testsuite/gas/arm/armv8_1-m-bf-exchange-bad.l: New
	* testsuite/gas/arm/armv8_1-m-bf-exchange-bad.d: New

*** opcodes/ChangeLog ***

2019-04-15  Sudakshina Das  <sudi.das@arm.com>

	* arm-dis.c (print_insn_thumb32): Add '%<bitfield>S' to print an
	Arm register with r13 and r15 unpredictable.
	(thumb32_opcodes): New instructions for bfx and bflx.