i386.c (print_reg): Сorrectly print 64-bit mask registers.

i386.c (print_reg): Сorrectly print 64-bit mask registers.

gcc/
	* config/i386/i386.c (print_reg): Сorrectly print 64-bit mask
	registers.
	(inline_secondary_memory_needed): Allow 64 bit wide mask registers.
	(ix86_hard_regno_mode_ok): Allow 32/64-bit mask registers and
	xmm/ymm16+ when availble.
	* config/i386/i386.h
	(HARD_REGNO_NREGS): Add mask regs.
	(VALID_AVX512F_REG_MODE): Ditto.
	(VALID_AVX512F_REG_MODE) : Define.
	(VALID_MASK_AVX512BW_MODE): Ditto.
	(reg_class) (MASK_REG_P(X)): Define.
	* config/i386/i386.md: Do not split long moves with mask register,
	use kmovb if avx512bw is availible.
	(movdi_internal): Handle mask registers.

Co-Authored-By: Andrey Turetskiy <andrey.turetskiy@intel.com>
Co-Authored-By: Anna Tikhonova <anna.tikhonova@intel.com>
Co-Authored-By: Ilya Tocar <ilya.tocar@intel.com>
Co-Authored-By: Ilya Verbin <ilya.verbin@intel.com>
Co-Authored-By: Kirill Yukhin <kirill.yukhin@intel.com>
Co-Authored-By: Maxim Kuznetsov <maxim.kuznetsov@intel.com>
Co-Authored-By: Michael Zolotukhin <michael.v.zolotukhin@intel.com>
From-SVN: r213962