tools: runtime SSE/SSE2 detection

Change-Id: I29330061e2986ec2ae899c2f3a63d0eadd9cc194

include/tools/cpuid.hxx

+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#ifndef INCLUDED_TOOLS_CPUID_HXX
+#define INCLUDED_TOOLS_CPUID_HXX
+
+#include <sal/config.h>
+#include <tools/toolsdllapi.h>
+
+namespace tools
+{
+namespace cpuid
+{
+    TOOLS_DLLPUBLIC bool hasSSE();
+    TOOLS_DLLPUBLIC bool hasSSE2();
+}
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

tools/Library_tl.mk

@@ -69,6 +69,7 @@ $(eval $(call gb_Library_add_exception_objects,tl,\
     tools/source/memtools/multisel \
     tools/source/memtools/unqidx \
     tools/source/misc/appendunixshellword \
+    tools/source/misc/cpuid \
     tools/source/misc/extendapplicationenvironment \
     tools/source/misc/getprocessworkingdir \
     tools/source/misc/solarmutex \

tools/source/misc/cpuid.cxx

+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+#include <tools/cpuid.hxx>
+#include <cstdint>
+
+namespace tools
+{
+namespace cpuid
+{
+
+// First minimize to MSVC / GCC compat. compiler and x86 / x64 architecture
+#if (defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86))) || (defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)))
+
+namespace
+{
+#if defined(_MSC_VER)
+#include <intrin.h>
+static void getCpuId(uint32_t array[4])
+{
+    __cpuid((int*)array, 1);
+}
+#else
+#include <cpuid.h>
+static void getCpuId(uint32_t array[4])
+{
+    __get_cpuid(1, array + 0, array + 1, array + 2, array + 3);
+}
+#endif
+}
+
+bool hasSSE()
+{
+    uint32_t cpuInfoArray[] = {0, 0, 0, 0};
+    getCpuId(cpuInfoArray);
+    return (cpuInfoArray[3] & (1 << 25)) != 0;
+}
+bool hasSSE2()
+{
+    uint32_t cpuInfoArray[] = {0, 0, 0, 0};
+    getCpuId(cpuInfoArray);
+    return (cpuInfoArray[3] & (1 << 26)) != 0;
+}
+
+#else
+
+bool hasSSE() { return false; }
+bool hasSSE2() { return false; }
+
+#endif
+
+}
+}
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */