-#define PPC_FPU64 (1<<0)
-#define PPC_ALTIVEC (1<<1)
-#define PPC_CRYPTO207 (1<<2)
+/*
+ * Flags' usage can appear ambiguous, because they are set rather
+ * to reflect OpenSSL performance preferences than actual processor
+ * capabilities.
+ */
+# define PPC_FPU64 (1<<0)
+# define PPC_ALTIVEC (1<<1)
+# define PPC_CRYPTO207 (1<<2)
+# define PPC_FPU (1<<3)
+# define PPC_MADD300 (1<<4)
+# define PPC_MFTB (1<<5)
+# define PPC_MFSPR268 (1<<6)