Support Intel AMX-FP16 ISA

Support Intel AMX-FP16 ISA

gcc/ChangeLog:

	* common/config/i386/cpuinfo.h (get_available_features): Detect
	amx-fp16.
	* common/config/i386/i386-common.cc (OPTION_MASK_ISA2_AMX_FP16_SET,
	OPTION_MASK_ISA2_AMX_FP16_UNSET): New macros.
	(ix86_handle_option): Handle -mamx-fp16.
	* common/config/i386/i386-cpuinfo.h (enum processor_features):
	Add FEATURE_AMX_FP16.
	* common/config/i386/i386-isas.h: Add ISA_NAME_TABLE_ENTRY for
	amx-fp16.
	* config.gcc: Add amxfp16intrin.h.
	* config/i386/cpuid.h (bit_AMX_FP16): New.
	* config/i386/i386-c.cc (ix86_target_macros_internal): Define
	__AMX_FP16__.
	* config/i386/i386-isa.def: Add DEF_PTA for AMX_FP16.
	* config/i386/i386-options.cc (isa2_opts): Add -mamx-fp16.
	(ix86_valid_target_attribute_inner_p): Add new ATTR.
	(ix86_option_override_internal): Handle AMX-FP16.
	* config/i386/i386.opt: Add -mamx-fp16.
	* config/i386/immintrin.h: Include amxfp16intrin.h.
	* doc/extend.texi: Document -mamx-fp16.
	* doc/invoke.texi: Document amx-fp16.
	* doc/sourcebuild.texi: Document amx_fp16.
	* config/i386/amxfp16intrin.h: New file.

gcc/testsuite/ChangeLog:

	* g++.dg/other/i386-2.C: Add -mamx-fp16.
	* 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.
	* lib/target-supports.exp: (check_effective_target_amx_fp16):
	New proc.
	* gcc.target/i386/funcspec-56.inc: Add new target attribute.
	* gcc.target/i386/amx-check.h: Add AMX_FP16.
	* gcc.target/i386/amx-helper.h: New file to support amx-fp16.
	* gcc.target/i386/amxfp16-asmatt-1.c: New test.
	* gcc.target/i386/amxfp16-asmintel-1.c: Ditto.
	* gcc.target/i386/amxfp16-dpfp16ps-2.c: Ditto.

Co-authored-by: Haochen Jiang <haochen.jiang@intel.com>