menu: show physical CPU cores in System Information

The "CPU Cores" row printed cpu_features_get_core_amount(), which is
the logical processor count, so a 16-core/32-thread 9950X3D read as
"CPU Cores: 32".

It now prints the physical count from
cpu_features_get_core_amount_physical(), and adds the thread count
when SMT makes it larger: "CPU Cores: 16 (32 threads)". Parts without
SMT keep the plain "CPU Cores: 4" form.

intl/msg_hash_us.h

@@ -1539,6 +1539,10 @@ MSG_HASH(
    MENU_ENUM_LABEL_VALUE_CPU_CORES,
    "CPU Cores"
    )
+MSG_HASH(
+   MENU_ENUM_LABEL_VALUE_CPU_THREADS,
+   "threads"
+   )
 MSG_HASH(
    MENU_ENUM_LABEL_VALUE_JIT_AVAILABLE,
    "JIT Available"

menu/menu_displaylist.c

@@ -2948,12 +2948,21 @@ static unsigned menu_displaylist_parse_system_info(file_list_t *list)
 
    /* CPU Cores */
    {
-      unsigned cores = cpu_features_get_core_amount();
-      size_t _len    = strlcpy(entry,
+      /* Physical cores, with the thread count alongside where SMT
+       * doubles it - the raw thread count read as 32 cores on a
+       * 16-core part. */
+      unsigned threads = cpu_features_get_core_amount();
+      unsigned cores   = cpu_features_get_core_amount_physical();
+      size_t _len      = strlcpy(entry,
             msg_hash_to_str(MENU_ENUM_LABEL_VALUE_CPU_CORES),
             sizeof(entry));
-      snprintf(entry + _len, sizeof(entry) - _len,
-            ": %u", cores);
+      if (threads > cores)
+         snprintf(entry + _len, sizeof(entry) - _len,
+               ": %u (%u %s)", cores, threads,
+               msg_hash_to_str(MENU_ENUM_LABEL_VALUE_CPU_THREADS));
+      else
+         snprintf(entry + _len, sizeof(entry) - _len,
+               ": %u", cores);
       if (menu_entries_append(list, entry, "",
             MENU_ENUM_LABEL_CPU_CORES, MENU_SETTINGS_CORE_INFO_NONE,
             0, 0, NULL))

msg_hash.h

@@ -2120,6 +2120,7 @@ enum msg_hash_enums
 
    /* System information */
    MENU_LABEL(CPU_CORES),
+   MENU_LABEL(CPU_THREADS),
    MENU_LABEL(CPU_ARCHITECTURE),
    MENU_LABEL(JIT_AVAILABLE),
    MENU_LABEL(BUNDLE_IDENTIFIER),

msg_hash_lbl_str.h

@@ -149,6 +149,7 @@
 #define MENU_ENUM_LABEL_CORE_STEAM_UNINSTALL_STR "core_steam_uninstall"
 #define MENU_ENUM_LABEL_CPU_ARCHITECTURE_STR "system_information_cpu_architecture"
 #define MENU_ENUM_LABEL_CPU_CORES_STR "system_information_cpu_cores"
+#define MENU_ENUM_LABEL_CPU_THREADS_STR "system_information_cpu_threads"
 #define MENU_ENUM_LABEL_CUSTOM_BIND_STR "custom_bind"
 #define MENU_ENUM_LABEL_CUSTOM_BIND_ALL_STR "custom_bind_all"
 #define MENU_ENUM_LABEL_DATABASE_MANAGER_STR "database_manager"