Support -mevex512 for AVX512BW intrins

Support -mevex512 for AVX512BW intrins

gcc/Changelog:

	* config/i386/i386-expand.cc (ix86_expand_vector_init_duplicate):
	Make sure there is EVEX512 enabled.
	(ix86_expand_vecop_qihi2): Refuse V32QI->V32HI when no EVEX512.
	* config/i386/i386.cc (ix86_hard_regno_mode_ok): Disable 64 bit mask
	when !TARGET_EVEX512.
	* config/i386/i386.md (avx512bw_512): New.
	(SWI1248_AVX512BWDQ_64): Add TARGET_EVEX512.
	(*zero_extendsidi2): Change isa to avx512bw_512.
	(kmov_isa): Ditto.
	(*anddi_1): Ditto.
	(*andn<mode>_1): Change isa to kmov_isa.
	(*<code><mode>_1): Ditto.
	(*notxor<mode>_1): Ditto.
	(*one_cmpl<mode>2_1): Ditto.
	(*one_cmplsi2_1_zext): Change isa to avx512bw_512.
	(*ashl<mode>3_1): Change isa to kmov_isa.
	(*lshr<mode>3_1): Ditto.
	* config/i386/sse.md (VI12HFBF_AVX512VL): Add TARGET_EVEX512.
	(VI1248_AVX512VLBW): Ditto.
	(VHFBF_AVX512VL): Ditto.
	(VI): Ditto.
	(VIHFBF): Ditto.
	(VI_AVX2): Ditto.
	(VI1_AVX512): Ditto.
	(VI12_256_512_AVX512VL): Ditto.
	(VI2_AVX2_AVX512BW): Ditto.
	(VI2_AVX512VNNIBW): Ditto.
	(VI2_AVX512VL): Ditto.
	(VI2HFBF_AVX512VL): Ditto.
	(VI8_AVX2_AVX512BW): Ditto.
	(VIMAX_AVX2_AVX512BW): Ditto.
	(VIMAX_AVX512VL): Ditto.
	(VI12_AVX2_AVX512BW): Ditto.
	(VI124_AVX2_24_AVX512F_1_AVX512BW): Ditto.
	(VI248_AVX512VL): Ditto.
	(VI248_AVX512VLBW): Ditto.
	(VI248_AVX2_8_AVX512F_24_AVX512BW): Ditto.
	(VI248_AVX512BW): Ditto.
	(VI248_AVX512BW_AVX512VL): Ditto.
	(VI248_512): Ditto.
	(VI124_256_AVX512F_AVX512BW): Ditto.
	(VI_AVX512BW): Ditto.
	(VIHFBF_AVX512BW): Ditto.
	(SWI1248_AVX512BWDQ): Ditto.
	(SWI1248_AVX512BW): Ditto.
	(SWI1248_AVX512BWDQ2): Ditto.
	(*knotsi_1_zext): Ditto.
	(define_split for zero_extend + not): Ditto.
	(kunpckdi): Ditto.
	(REDUC_SMINMAX_MODE): Ditto.
	(VEC_EXTRACT_MODE): Ditto.
	(*avx512bw_permvar_truncv16siv16hi_1): Ditto.
	(*avx512bw_permvar_truncv16siv16hi_1_hf): Ditto.
	(truncv32hiv32qi2): Ditto.
	(avx512bw_<code>v32hiv32qi2): Ditto.
	(avx512bw_<code>v32hiv32qi2_mask): Ditto.
	(avx512bw_<code>v32hiv32qi2_mask_store): Ditto.
	(usadv64qi): Ditto.
	(VEC_PERM_AVX2): Ditto.
	(AVX512ZEXTMASK): Ditto.
	(SWI24_MASK): New.
	(vec_pack_trunc_<mode>): Change iterator to SWI24_MASK.
	(avx512bw_packsswb<mask_name>): Add TARGET_EVEX512.
	(avx512bw_packssdw<mask_name>): Ditto.
	(avx512bw_interleave_highv64qi<mask_name>): Ditto.
	(avx512bw_interleave_lowv64qi<mask_name>): Ditto.
	(<mask_codefor>avx512bw_pshuflwv32hi<mask_name>): Ditto.
	(<mask_codefor>avx512bw_pshufhwv32hi<mask_name>): Ditto.
	(vec_unpacks_lo_di): Ditto.
	(SWI48x_MASK): New.
	(vec_unpacks_hi_<mode>): Change iterator to SWI48x_MASK.
	(avx512bw_umulhrswv32hi3<mask_name>): Add TARGET_EVEX512.
	(VI1248_AVX512VL_AVX512BW): Ditto.
	(avx512bw_<code>v32qiv32hi2<mask_name>): Ditto.
	(*avx512bw_zero_extendv32qiv32hi2_1): Ditto.
	(*avx512bw_zero_extendv32qiv32hi2_2): Ditto.
	(<insn>v32qiv32hi2): Ditto.
	(pbroadcast_evex_isa): Change isa attribute to avx512bw_512.
	(VPERMI2): Add TARGET_EVEX512.
	(VPERMI2I): Ditto.