Support Intel prefetchit0/t1

gcc/ChangeLog:

	* common/config/i386/cpuinfo.h (get_available_features):
	Detect PREFETCHI.
	* common/config/i386/i386-common.cc
	(OPTION_MASK_ISA2_PREFETCHI_SET,
	OPTION_MASK_ISA2_PREFETCHI_UNSET): New.
	(ix86_handle_option): Handle -mprefetchi.
	* common/config/i386/i386-cpuinfo.h
	(enum processor_features): Add FEATURE_PREFETCHI.
	* common/config/i386/i386-isas.h: Add ISA_NAME_TABLE_ENTRY
	for prefetchi.
	* config.gcc: Add prfchiintrin.h.
	* config/i386/cpuid.h (bit_PREFETCHI): New.
	* config/i386/i386-builtin-types.def:
	Add DEF_FUNCTION_TYPE (VOID, PCVOID, INT)
	and DEF_FUNCTION_TYPE (VOID, PCVOID, INT, INT, INT).
	* config/i386/i386-builtin.def (BDESC): Add new builtins.
	* config/i386/i386-c.cc (ix86_target_macros_internal):
	Define __PREFETCHI__.
	* config/i386/i386-expand.cc: Handle new builtins.
	* config/i386/i386-isa.def (PREFETCHI):
	Add DEF_PTA(PREFETCHI).
	* config/i386/i386-options.cc
	(ix86_valid_target_attribute_inner_p): Handle prefetchi.
	* config/i386/i386.md (prefetchi): New define_insn.
	* config/i386/i386.opt: Add option -mprefetchi.
	* config/i386/predicates.md (local_func_symbolic_operand):
	New predicates.
	* config/i386/x86gprintrin.h: Include prfchiintrin.h.
	* config/i386/xmmintrin.h (enum _mm_hint): New enum for
	prefetchi.
	(_mm_prefetch): Handle the highest bit of enum.
	* doc/extend.texi: Document prefetchi.
	* doc/invoke.texi: Document -mprefetchi.
	* doc/sourcebuild.texi: Document target prefetchi.
	* config/i386/prfchiintrin.h: New file.

gcc/testsuite/ChangeLog:

	* g++.dg/other/i386-2.C: Add -mprefetchi.
	* g++.dg/other/i386-3.C: Ditto.
	* gcc.target/i386/avx-1.c: Ditto.
	* gcc.target/i386/funcspec-56.inc: Add new target attribute.
	* gcc.target/i386/sse-13.c: Add -mprefetchi.
	* gcc.target/i386/sse-23.c: Ditto.
	* gcc.target/i386/x86gprintrin-1.c: Ditto.
	* gcc.target/i386/x86gprintrin-2.c: Ditto.
	* gcc.target/i386/x86gprintrin-3.c: Ditto.
	* gcc.target/i386/x86gprintrin-4.c: Ditto.
	* gcc.target/i386/x86gprintrin-5.c: Ditto.
	* gcc.target/i386/prefetchi-1.c: New test.
	* gcc.target/i386/prefetchi-2.c: Ditto.
	* gcc.target/i386/prefetchi-3.c: Ditto.
	* gcc.target/i386/prefetchi-4.c: Ditto.

Co-authored-by: Hongtao Liu <hongtao.liu@intel.com>

4 files changed, 19 insertions, 0 deletions

diff --git a/gcc/common/config/i386/cpuinfo.h b/gcc/common/config/i386/cpuinfo.h
index a38c1b6..ac77616 100644
--- a/gcc/common/config/i386/cpuinfo.h
+++ b/gcc/common/config/i386/cpuinfo.h
@@ -839,6 +839,8 @@ get_available_features (struct __processor_model *cpu_model,
 	set_feature (FEATURE_HRESET);
       if (eax & bit_CMPCCXADD)
 	set_feature(FEATURE_CMPCCXADD);
+      if (edx & bit_PREFETCHI)
+	set_feature (FEATURE_PREFETCHI);
       if (avx_usable)
 	{
 	  if (eax & bit_AVXVNNI)
diff --git a/gcc/common/config/i386/i386-common.cc b/gcc/common/config/i386/i386-common.cc
index a044e28..9bcae02 100644
--- a/gcc/common/config/i386/i386-common.cc
+++ b/gcc/common/config/i386/i386-common.cc
@@ -112,6 +112,7 @@ along with GCC; see the file COPYING3.  If not see
 #define OPTION_MASK_ISA2_AVXNECONVERT_SET OPTION_MASK_ISA2_AVXNECONVERT
 #define OPTION_MASK_ISA2_CMPCCXADD_SET OPTION_MASK_ISA2_CMPCCXADD
 #define OPTION_MASK_ISA2_AMX_FP16_SET OPTION_MASK_ISA2_AMX_FP16
+#define OPTION_MASK_ISA2_PREFETCHI_SET OPTION_MASK_ISA2_PREFETCHI
 
 /* SSE4 includes both SSE4.1 and SSE4.2. -msse4 should be the same
    as -msse4.2.  */
@@ -287,6 +288,7 @@ along with GCC; see the file COPYING3.  If not see
 #define OPTION_MASK_ISA2_AVXNECONVERT_UNSET OPTION_MASK_ISA2_AVXNECONVERT
 #define OPTION_MASK_ISA2_CMPCCXADD_UNSET OPTION_MASK_ISA2_CMPCCXADD
 #define OPTION_MASK_ISA2_AMX_FP16_UNSET OPTION_MASK_ISA2_AMX_FP16
+#define OPTION_MASK_ISA2_PREFETCHI_UNSET OPTION_MASK_ISA2_PREFETCHI
 
 /* SSE4 includes both SSE4.1 and SSE4.2.  -mno-sse4 should the same
    as -mno-sse4.1. */
@@ -1211,6 +1213,19 @@ ix86_handle_option (struct gcc_options *opts,
 	}
       return true;
 
+    case OPT_mprefetchi:
+      if (value)
+	{
+	  opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_PREFETCHI_SET;
+	  opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_PREFETCHI_SET;
+	}
+      else
+	{
+	  opts->x_ix86_isa_flags2 &= ~OPTION_MASK_ISA2_PREFETCHI_UNSET;
+	  opts->x_ix86_isa_flags2_explicit |= OPTION_MASK_ISA2_PREFETCHI_UNSET;
+	}
+      return true;
+
     case OPT_mfma:
       if (value)
 	{
diff --git a/gcc/common/config/i386/i386-cpuinfo.h b/gcc/common/config/i386/i386-cpuinfo.h
index 014174e..68eda7a 100644
--- a/gcc/common/config/i386/i386-cpuinfo.h
+++ b/gcc/common/config/i386/i386-cpuinfo.h
@@ -249,6 +249,7 @@ enum processor_features
   FEATURE_AVXNECONVERT,
   FEATURE_CMPCCXADD,
   FEATURE_AMX_FP16,
+  FEATURE_PREFETCHI,
   CPU_FEATURE_MAX
 };
 
diff --git a/gcc/common/config/i386/i386-isas.h b/gcc/common/config/i386/i386-isas.h
index 7c4a714..8648ea6 100644
--- a/gcc/common/config/i386/i386-isas.h
+++ b/gcc/common/config/i386/i386-isas.h
@@ -182,4 +182,5 @@ ISA_NAMES_TABLE_START
 			P_NONE, "-mavxneconvert")
   ISA_NAMES_TABLE_ENTRY("cmpccxadd", FEATURE_CMPCCXADD, P_NONE, "-mcmpccxadd")
   ISA_NAMES_TABLE_ENTRY("amx-fp16", FEATURE_AMX_FP16, P_NONE, "-mamx-fp16")
+  ISA_NAMES_TABLE_ENTRY("prefetchi", FEATURE_PREFETCHI, P_NONE, "-mprefetchi")
 ISA_NAMES_TABLE_END