i386: Call get_available_features for all CPUs with max_level >= 1 [PR100758]

get_available_features doesn't depend on cpu_model2->__cpu_{family,model}
and just sets stuff up based on CPUID leaf 1, or some extended ones,
so I wonder why are we calling it separately for Intel, AMD and Zhaoxin
and not for all other CPUs too?  I think various programs in the wild
which aren't using __builtin_cpu_{is,supports} just check the various CPUID
leafs and query bits in there, without blacklisting unknown CPU vendors,
so I think even __builtin_cpu_supports ("sse2") etc. should be reliable
if those VENDOR_{CENTAUR,CYRIX,NSC,OTHER} CPUs set those bits in CPUID leaf
1 or some extended ones.  Calling it for all CPUs also means it can be
inlined because there will be just a single caller.

I have tested it on Intel and Martin tested it on AMD, but can't test it
on non-Intel/AMD; for Intel/AMD/Zhaoxin it should be really no change in
behavior.

2023-02-09  Jakub Jelinek  <jakub@redhat.com>

	PR target/100758
	* config/i386/cpuinfo.c (cpu_indicator_init): Call
	get_available_features for all CPUs with max_level >= 1, rather
	than just Intel or AMD.

(cherry picked from commit b24e9c083093a9e1b1007933a184c02f7ff058db)

diff --git a/libgcc/config/i386/cpuinfo.c b/libgcc/config/i386/cpuinfo.c
index 83301a1445f23f4b7494b30e59677824d31dab00..ad250edbcb77a1e37f078135b98bb53a389085bd 100644 (file)
--- a/libgcc/config/i386/cpuinfo.c
+++ b/libgcc/config/i386/cpuinfo.c
@@ -474,6 +474,9 @@ __cpu_indicator_init (void)
   extended_model = (eax >> 12) & 0xf0;
   extended_family = (eax >> 20) & 0xff;
 
+  /* Find available features. */
+  get_available_features (ecx, edx, max_level);
+
   if (vendor == signature_INTEL_ebx)
     {
       /* Adjust model and family for Intel CPUS. */
@@ -487,8 +490,6 @@ __cpu_indicator_init (void)
 
       /* Get CPU type.  */
       get_intel_cpu (family, model, brand_id);
-      /* Find available features. */
-      get_available_features (ecx, edx, max_level);
       __cpu_model.__cpu_vendor = VENDOR_INTEL;
     }
   else if (vendor == signature_AMD_ebx)
@@ -502,8 +503,6 @@ __cpu_indicator_init (void)
 
       /* Get CPU type.  */
       get_amd_cpu (family, model);
-      /* Find available features. */
-      get_available_features (ecx, edx, max_level);
       __cpu_model.__cpu_vendor = VENDOR_AMD;
     }
   else