AVX512FP16: Initial support for AVX512FP16 feature and scalar _Float16 instructions.

gcc/ChangeLog:

	* common/config/i386/cpuinfo.h (get_available_features):
	Detect FEATURE_AVX512FP16.
	* common/config/i386/i386-common.c
	(OPTION_MASK_ISA_AVX512FP16_SET,
	OPTION_MASK_ISA_AVX512FP16_UNSET,
	OPTION_MASK_ISA2_AVX512FP16_SET,
	OPTION_MASK_ISA2_AVX512FP16_UNSET): New.
	(OPTION_MASK_ISA2_AVX512BW_UNSET,
	OPTION_MASK_ISA2_AVX512BF16_UNSET): Add AVX512FP16.
	(ix86_handle_option): Handle -mavx512fp16.
	* common/config/i386/i386-cpuinfo.h (enum processor_features):
	Add FEATURE_AVX512FP16.
	* common/config/i386/i386-isas.h: Add entry for AVX512FP16.
	* config.gcc: Add avx512fp16intrin.h.
	* config/i386/avx512fp16intrin.h: New intrinsic header.
	* config/i386/cpuid.h: Add bit_AVX512FP16.
	* config/i386/i386-builtin-types.def: (FLOAT16): New primitive type.
	* config/i386/i386-builtins.c: Support _Float16 type for i386
	backend.
	(ix86_register_float16_builtin_type): New function.
	(ix86_float16_type_node): New.
	* config/i386/i386-c.c (ix86_target_macros_internal): Define
	__AVX512FP16__.
	* config/i386/i386-expand.c (ix86_expand_branch): Support
	HFmode.
	(ix86_prepare_fp_compare_args): Adjust TARGET_SSE_MATH &&
	SSE_FLOAT_MODE_P to SSE_FLOAT_MODE_SSEMATH_OR_HF_P.
	(ix86_expand_fp_movcc): Ditto.
	* config/i386/i386-isa.def: Add PTA define for AVX512FP16.
	* config/i386/i386-options.c (isa2_opts): Add -mavx512fp16.
	(ix86_valid_target_attribute_inner_p): Add avx512fp16 attribute.
	* config/i386/i386.c (ix86_get_ssemov): Use
	vmovdqu16/vmovw/vmovsh for HFmode/HImode scalar or vector.
	(ix86_get_excess_precision): Use
	FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16 when TARGET_AVX512FP16
	existed.
	(sse_store_index): Use SFmode cost for HFmode cost.
	(inline_memory_move_cost): Add HFmode, and perfer SSE cost over
	GPR cost for HFmode.
	(ix86_hard_regno_mode_ok): Allow HImode in sse register.
	(ix86_mangle_type): Add manlging for _Float16 type.
	(inline_secondary_memory_needed): No memory is needed for
	16bit movement between gpr and sse reg under
	TARGET_AVX512FP16.
	(ix86_multiplication_cost): Adjust TARGET_SSE_MATH &&
	SSE_FLOAT_MODE_P to SSE_FLOAT_MODE_SSEMATH_OR_HF_P.
	(ix86_division_cost): Ditto.
	(ix86_rtx_costs): Ditto.
	(ix86_add_stmt_cost): Ditto.
	(ix86_optab_supported_p): Ditto.
	* config/i386/i386.h (VALID_AVX512F_SCALAR_MODE): Add HFmode.
	(SSE_FLOAT_MODE_SSEMATH_OR_HF_P): Add HFmode.
	(PTA_SAPPHIRERAPIDS): Add PTA_AVX512FP16.
	* config/i386/i386.md (mode): Add HFmode.
	(MODE_SIZE): Add HFmode.
	(isa): Add avx512fp16.
	(enabled): Handle avx512fp16.
	(ssemodesuffix): Add sh suffix for HFmode.
	(comm): Add mult, div.
	(plusminusmultdiv): New code iterator.
	(insn): Add mult, div.
	(*movhf_internal): Adjust for avx512fp16 instruction.
	(*movhi_internal): Ditto.
	(*cmpi<unord>hf): New define_insn for HFmode.
	(*ieee_s<ieee_maxmin>hf3): Likewise.
	(extendhf<mode>2): Likewise.
	(trunc<mode>hf2): Likewise.
	(float<floatunssuffix><mode>hf2): Likewise.
	(*<insn>hf): Likewise.
	(cbranchhf4): New expander.
	(movhfcc): Likewise.
	(<insn>hf3): Likewise.
	(mulhf3): Likewise.
	(divhf3): Likewise.
	* config/i386/i386.opt: Add mavx512fp16.
	* config/i386/immintrin.h: Include avx512fp16intrin.h.
	* doc/invoke.texi: Add mavx512fp16.
	* doc/extend.texi: Add avx512fp16 Usage Notes.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/avx-1.c: Add -mavx512fp16 in dg-options.
	* gcc.target/i386/avx-2.c: Ditto.
	* gcc.target/i386/avx512-check.h: Check cpuid for AVX512FP16.
	* gcc.target/i386/funcspec-56.inc: Add new target attribute check.
	* gcc.target/i386/sse-13.c: Add -mavx512fp16.
	* 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_avx512fp16): New.
	* g++.target/i386/float16-1.C: New test.
	* g++.target/i386/float16-2.C: Ditto.
	* g++.target/i386/float16-3.C: Ditto.
	* gcc.target/i386/avx512fp16-12a.c: Ditto.
	* gcc.target/i386/avx512fp16-12b.c: Ditto.
	* gcc.target/i386/float16-3a.c: Ditto.
	* gcc.target/i386/float16-3b.c: Ditto.
	* gcc.target/i386/float16-4a.c: Ditto.
	* gcc.target/i386/float16-4b.c: Ditto.
	* gcc.target/i386/pr54855-12.c: Ditto.
	* g++.dg/other/i386-2.C: Ditto.
	* g++.dg/other/i386-3.C: Ditto.

Co-Authored-By: H.J. Lu <hongjiu.lu@intel.com>
Co-Authored-By: Liu Hongtao <hongtao.liu@intel.com>
Co-Authored-By: Wang Hongyu <hongyu.wang@intel.com>
Co-Authored-By: Xu Dianhong <dianhong.xu@intel.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index ad8f011..82dc131 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -3164,7 +3164,7 @@ proc check_effective_target_has_q_floating_suffix { } {
 
 proc check_effective_target_float16 {} {
     return [check_no_compiler_messages_nocache float16 object {
-        _Float16 x;
+        _Float16 foo (_Float16 x) { return x; }
     } [add_options_for_float16 ""]]
 }
 
@@ -8877,6 +8877,17 @@ proc check_prefer_avx128 { } {
 }
 
 
+# Return 1 if avx512fp16 instructions can be compiled.
+
+proc check_effective_target_avx512fp16 { } {
+    return [check_no_compiler_messages avx512fp16 object {
+	void foo (void)
+	{
+	  asm volatile ("vmovw %edi, %xmm0");
+	}
+    } "-O2 -mavx512fp16" ]
+}
+
 # Return 1 if avx512f instructions can be compiled.
 
 proc check_effective_target_avx512f { } {