Enable GCC support for AMX-TILE,AMX-INT8,AMX-BF16.

Enable GCC support for AMX-TILE,AMX-INT8,AMX-BF16.

AMX-TILE:ldtilecfg/sttilecfg/tileloadd/tileloaddt1/tilezero/tilerelease
AMX-INT8:tdpbssd/tdpbsud/tdpbusd/tdpbuud
AMX-BF16:tdpbf16ps

gcc/ChangeLog

	* common/config/i386/i386-common.c (OPTION_MASK_ISA2_AMX_TILE_SET,
	OPTION_MASK_ISA2_AMX_INT8_SET, OPTION_MASK_ISA2_AMX_BF16_SET,
	OPTION_MASK_ISA2_AMX_TILE_UNSET, OPTION_MASK_ISA2_AMX_INT8_UNSET,
	OPTION_MASK_ISA2_AMX_BF16_UNSET, OPTION_MASK_ISA2_XSAVE_UNSET):
	New marcos.
	(ix86_handle_option): Hanlde -mamx-tile, -mamx-int8, -mamx-bf16.
	* common/config/i386/i386-cpuinfo.h (processor_types): Add
	FEATURE_AMX_TILE, FEATURE_AMX_INT8, FEATURE_AMX_BF16.
	* common/config/i386/cpuinfo.h (XSTATE_TILECFG,
	XSTATE_TILEDATA, XCR_AMX_ENABLED_MASK): New macro.
	(get_available_features): Enable AMX features only if
	their states are suoorited by OSXSAVE.
	* common/config/i386/i386-isas.h: Add ISA_NAME_TABLE_ENTRY
	for amx-tile, amx-int8, amx-bf16.
	* config.gcc: Add amxtileintrin.h, amxint8intrin.h,
	amxbf16intrin.h to extra headers.
	* config/i386/amxbf16intrin.h: New file.
	* config/i386/amxint8intrin.h: Ditto.
	* config/i386/amxtileintrin.h: Ditto.
	* config/i386/cpuid.h (bit_AMX_BF16, bit_AMX_TILE, bit_AMX_INT8):
	New macro.
	* config/i386/i386-c.c (ix86_target_macros_internal): Define
	__AMX_TILE__, __AMX_INT8__, AMX_BF16__.
	* config/i386/i386-options.c (ix86_target_string): Add
	-mamx-tile, -mamx-int8, -mamx-bf16.
	(ix86_option_override_internal): Handle AMX-TILE,
	AMX-INT8, AMX-BF16.
	* config/i386/i386.h (TARGET_AMX_TILE, TARGET_AMX_TILE_P,
	TARGET_AMX_INT8, TARGET_AMX_INT8_P, TARGET_AMX_BF16_P,
	PTA_AMX_TILE, PTA_AMX_INT8, PTA_AMX_BF16): New macros.
	* config/i386/i386.opt: Add -mamx-tile, -mamx-int8, -mamx-bf16.
	* config/i386/immintrin.h: Include amxtileintrin.h,
	amxint8intrin.h, amxbf16intrin.h.
	* doc/invoke.texi: Document -mamx-tile, -mamx-int8, -mamx-bf16.
	* doc/extend.texi: Document amx-tile, amx-int8, amx-bf16.
	* doc/sourcebuild.texi ((Effective-Target Keywords, Other
	hardware attributes): Document amx_int8, amx_tile, amx_bf16.

gcc/testsuite/ChangeLog

	* lib/target-supports.exp (check_effective_target_amx_tile,
	check_effective_target_amx_int8,
	check_effective_target_amx_bf16): New proc.
	* g++.dg/other/i386-2.C: Add -mamx-tile, -mamx-int8, -mamx-bf16.
	* g++.dg/other/i386-3.C: Ditto.
	* gcc.target/i386/sse-12.c: Ditto.
	* gcc.target/i386/sse-13.c: Ditto.
	* gcc.target/i386/sse-14.c: Ditto.
	* gcc.target/i386/sse-22.c: Ditto.
	* gcc.target/i386/sse-23.c: Ditto.
	* gcc.target/i386/funcspec-56.inc: Add new target attribute.
	* gcc.target/i386/amx-check.h: New header file.
	* gcc.target/i386/amxbf16-asmatt-1.c: New test.
	* gcc.target/i386/amxint8-asmatt-1.c: New test.
	* gcc.target/i386/amxtile-asmatt-1.c: Ditto.
	* gcc.target/i386/amxbf16-asmintel-1.c: Ditto.
	* gcc.target/i386/amxint8-asmintel-1.c: Ditto.
	* gcc.target/i386/amxtile-asmintel-1.c: Ditto.
	* gcc.target/i386/amxbf16-dpbf16ps-2.c: Ditto.
	* gcc.target/i386/amxint8-dpbssd-2.c: Ditto.
	* gcc.target/i386/amxint8-dpbsud-2.c: Ditto.
	* gcc.target/i386/amxint8-dpbusd-2.c: Ditto.
	* gcc.target/i386/amxint8-dpbuud-2.c: Ditto.
	* gcc.target/i386/amxtile-2.c: Ditto.