[Mesa-dev] [PATCH 2/3] mesa: helper macros to enable per function optimisations

[Timothy Arceri]

Signed-off-by: Timothy Arceri <t_arceri at yahoo.com.au>
---
 src/mesa/x86/x86_function_opt.h | 42 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 src/mesa/x86/x86_function_opt.h

 Using a macro like this means we can easily enable runtime support in clang
 once it also supports it. Also its less of an impact for those compiling
 with the optimisations enabled.
 Finally I'm assuming its also better for lto.

diff --git a/src/mesa/x86/x86_function_opt.h b/src/mesa/x86/x86_function_opt.h
new file mode 100644
index 0000000..c1ffb19
--- /dev/null
+++ b/src/mesa/x86/x86_function_opt.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) Timothy Arceri
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Author:
+ *    Timothy Arceri <t_arceri at yahoo.com.au>
+ *
+ */
+
+/*
+ * Helper macros to enable per function optimisations
+ *
+ */
+
+#ifdef __SSSE3__
+   #define SSSE3_FUNC_OPT_START
+   #define SSSE3_FUNC_OPT_END
+#else
+   #if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 3))
+      #define SSSE3_FUNC_OPT_START _Pragma("GCC push_options") \
+         _Pragma("GCC target(\"ssse3\")")
+      #define SSSE3_FUNC_OPT_END _Pragma("GCC pop_options")
+   #endif
+#endif
-- 
1.9.3