-const Attributes NoInline = 1<<11; // inline=never
-const Attributes AlwaysInline = 1<<12; // inline=always
-const Attributes OptimizeForSize = 1<<13; // opt_size
-const Attributes Alignment = 0xffff<<16; ///< Alignment of parameter (16 bits)
- // 0 = unknown, else in clear (not log)
-
+const Attributes NoInline = 1<<11; ///< inline=never
+const Attributes AlwaysInline = 1<<12; ///< inline=always
+const Attributes OptimizeForSize = 1<<13; ///< opt_size
+const Attributes StackProtect = 1<<14; ///< Stack protection.
+const Attributes StackProtectReq = 1<<15; ///< Stack protection required.
+const Attributes Alignment = 31<<16; ///< Alignment of parameter (5 bits)
+ // stored as log2 of alignment with +1 bias
+ // 0 means unaligned different from align 1
+const Attributes NoCapture = 1<<21; ///< Function creates no aliases of pointer
+const Attributes NoRedZone = 1<<22; /// disable redzone
+const Attributes NoImplicitFloat = 1<<23; /// disable implicit floating point
+ /// instructions.
+const Attributes Naked = 1<<24; ///< Naked function
+