Enable Intel HRESET Instruction

gcc/

	* common/config/i386/cpuinfo.h (get_available_features):
	Detect HRESET.
	* common/config/i386/i386-common.c (OPTION_MASK_ISA2_HRESET_SET,
	OPTION_MASK_ISA2_HRESET_UNSET): New macros.
	(ix86_handle_option): Handle -mhreset.
	* common/config/i386/i386-cpuinfo.h (enum processor_features):
	Add FEATURE_HRESET.
	* common/config/i386/i386-isas.h: Add ISA_NAMES_TABLE_ENTRY
	for hreset.
	* config.gcc: Add hresetintrin.h
	* config/i386/hresetintrin.h: New header file.
	* config/i386/x86gprintrin.h: Include hresetintrin.h.
	* config/i386/cpuid.h (bit_HRESET): New.
	* config/i386/i386-builtin.def: Add new builtin.
	* config/i386/i386-expand.c (ix86_expand_builtin):
	Handle new builtin.
	* config/i386/i386-c.c (ix86_target_macros_internal): Define
	__HRESET__.
	* config/i386/i386-options.c (isa2_opts): Add -mhreset.
	(ix86_valid_target_attribute_inner_p): Handle hreset.
	* config/i386/i386.h (TARGET_HRESET, TARGET_HRESET_P,
	PTA_HRESET): New.
	(PTA_ALDERLAKE): Add PTA_HRESET.
	* config/i386/i386.opt: Add option -mhreset.
	* config/i386/i386.md (UNSPECV_HRESET): New unspec.
	(hreset): New define_insn.
	* doc/invoke.texi: Document -mhreset.
	* doc/extend.texi: Document hreset.

gcc/testsuite/

	* gcc.target/i386/hreset-1.c: New test.
	* gcc.target/i386/funcspec-56.inc: Add new target attribute.
	* gcc.target/i386/x86gprintrin-1.c: Add -mhreset.
	* gcc.target/i386/x86gprintrin-2.c: Ditto.
	* gcc.target/i386/x86gprintrin-3.c: Ditto.
	* gcc.target/i386/x86gprintrin-4.c: Add mhreset.
	* gcc.target/i386/x86gprintrin-5.c: Ditto.

4 files changed, 20 insertions, 0 deletions

diff --git a/gcc/common/config/i386/cpuinfo.h b/gcc/common/config/i386/cpuinfo.h
index 0e63db2..1e8324e 100644
--- a/gcc/common/config/i386/cpuinfo.h
+++ b/gcc/common/config/i386/cpuinfo.h
@@ -707,6 +707,9 @@ get_available_features (struct __processor_model *cpu_model,
 	  __cpuid_count (7, 1, eax, ebx, ecx, edx);
 	  if (eax & bit_AVX512BF16)
 	    set_feature (FEATURE_AVX512BF16);
+	  if (eax & bit_HRESET)
+	    set_feature (FEATURE_HRESET);
+
 	}
     }
 
diff --git a/gcc/common/config/i386/i386-common.c b/gcc/common/config/i386/i386-common.c
index 6a06383..bfdca85 100644
--- a/gcc/common/config/i386/i386-common.c
+++ b/gcc/common/config/i386/i386-common.c
@@ -164,6 +164,7 @@ along with GCC; see the file COPYING3.  If not see
 #define OPTION_MASK_ISA2_SERIALIZE_SET OPTION_MASK_ISA2_SERIALIZE
 #define OPTION_MASK_ISA2_TSXLDTRK_SET OPTION_MASK_ISA2_TSXLDTRK
 #define OPTION_MASK_ISA2_UINTR_SET OPTION_MASK_ISA2_UINTR
+#define OPTION_MASK_ISA2_HRESET_SET OPTION_MASK_ISA2_HRESET
 
 /* Define a set of ISAs which aren't available when a given ISA is
    disabled.  MMX and SSE ISAs are handled separately.  */
@@ -256,6 +257,7 @@ along with GCC; see the file COPYING3.  If not see
 #define OPTION_MASK_ISA2_AMX_INT8_UNSET OPTION_MASK_ISA2_AMX_INT8
 #define OPTION_MASK_ISA2_AMX_BF16_UNSET OPTION_MASK_ISA2_AMX_BF16
 #define OPTION_MASK_ISA2_UINTR_UNSET OPTION_MASK_ISA2_UINTR
+#define OPTION_MASK_ISA2_HRESET_UNSET OPTION_MASK_ISA2_HRESET
 
 /* SSE4 includes both SSE4.1 and SSE4.2.  -mno-sse4 should the same
    as -mno-sse4.1. */
@@ -716,6 +718,19 @@ ix86_handle_option (struct gcc_options *opts,
 	  opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_UINTR_UNSET;
 	}
       return true;
+    
+    case OPT_mhreset:
+      if (value)
+	{
+	  opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_HRESET_SET;
+	  opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_HRESET_SET;
+	}
+      else
+	{
+	  opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_HRESET_UNSET;
+	  opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_HRESET_UNSET;
+	}
+      return true;
 
     case OPT_mavx5124fmaps:
       if (value)
diff --git a/gcc/common/config/i386/i386-cpuinfo.h b/gcc/common/config/i386/i386-cpuinfo.h
index 3fc2af5..8c3f782 100644
--- a/gcc/common/config/i386/i386-cpuinfo.h
+++ b/gcc/common/config/i386/i386-cpuinfo.h
@@ -220,6 +220,7 @@ enum processor_features
   FEATURE_AMX_INT8,
   FEATURE_AMX_BF16,
   FEATURE_UINTR,
+  FEATURE_HRESET,
   CPU_FEATURE_MAX
 };
 
diff --git a/gcc/common/config/i386/i386-isas.h b/gcc/common/config/i386/i386-isas.h
index c2dc741..888e325 100644
--- a/gcc/common/config/i386/i386-isas.h
+++ b/gcc/common/config/i386/i386-isas.h
@@ -164,4 +164,5 @@ ISA_NAMES_TABLE_START
   ISA_NAMES_TABLE_ENTRY("amx-int8", FEATURE_AMX_INT8, P_NONE, "-mamx-int8")
   ISA_NAMES_TABLE_ENTRY("amx-bf16", FEATURE_AMX_BF16, P_NONE, "-mamx-bf16")
   ISA_NAMES_TABLE_ENTRY("uintr", FEATURE_UINTR, P_NONE, "-muintr")
+  ISA_NAMES_TABLE_ENTRY("hreset", FEATURE_HRESET, P_NONE, "-mhreset")
 ISA_NAMES_TABLE_END