Move cpuid to seperate header file.

It'll be later used also for detecting sse4.2

Change-Id: I1930abb29026b455d453a79b5f301cdf37585160
Reviewed-on: https://code.wireshark.org/review/1803
Reviewed-by: Michael Mann <mmann78@netscape.net>

1 files changed, 66 insertions, 0 deletions

diff --git a/wsutil/ws_cpuid.h b/wsutil/ws_cpuid.h
new file mode 100644
index 0000000000..75500f2c4d
--- /dev/null
+++ b/wsutil/ws_cpuid.h
@@ -0,0 +1,66 @@
+/* ws_cpuid.h
+ * Get the CPU info
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*
+ * Get CPU info on platforms where the cpuid instruction can be used skip 32 bit versions for GCC
+ * 	http://www.intel.com/content/dam/www/public/us/en/documents/application-notes/processor-identification-cpuid-instruction-note.pdf
+ * the ws_cpuid() routine will return 0 in CPUInfo[0] if cpuinfo isn't available.
+ */
+
+#if defined(_MSC_VER)     /* MSVC */
+static void
+ws_cpuid(guint32 *CPUInfo, guint32 selector)
+{
+	__cpuid((int *) CPUInfo, selector);
+}
+
+#elif defined(__GNUC__)  /* GCC/clang */
+
+#if defined(__x86_64__)
+static inline void
+ws_cpuid(guint32 *CPUInfo, int selector)
+{
+	__asm__ __volatile__("cpuid"
+						: "=a" (CPUInfo[0]),
+							"=b" (CPUInfo[1]),
+							"=c" (CPUInfo[2]),
+							"=d" (CPUInfo[3])
+						: "a"(selector));
+}
+#else /* (__i386__) */
+
+static void
+ws_cpuid(guint32 *CPUInfo, int selector _U_)
+{
+	/* TODO: need a test if older proccesors have the cpuid instruction */
+	CPUInfo[0] = 0;
+}
+#endif
+
+#else /* Other compilers */
+
+static void
+ws_cpuid(guint32 *CPUInfo, int selector _U_)
+{
+	CPUInfo[0] = 0;
+}
+#endif