ia64.h (SIMULTANEOUS PREFETCHES): Define.

	* config/ia64/ia64.h (SIMULTANEOUS PREFETCHES): Define.
	  (PREFETCH_BLOCK): Define.
	* config/ia64/ia64.md (itanium_class): Add lfetch.
	  (prefetch, prefetch_internal): New.
	  prefetch_sse.

From-SVN: r47578

gcc/config/ia64/ia64.h

@@ -2707,6 +2707,19 @@ do {									\
    #pragma weak.  Note, #pragma weak will only be supported if SUPPORT_WEAK is
    defined.  */
 
+/* If this architecture supports prefetch, define this to be the number of
+   prefetch commands that can be executed in parallel.
+
+   ??? This number is bogus and needs to be replaced before the value is
+   actually used in optimizations.  */
+
+#define SIMULTANEOUS_PREFETCHES 6
+
+/* If this architecture supports prefetch, define this to be the size of
+   the cache line that is prefetched.  */
+
+#define PREFETCH_BLOCK 32
+
 #define HANDLE_SYSV_PRAGMA
 
 /* In rare cases, correct code generation requires extra machine dependent