X-Git-Url: http://mj.ucw.cz/gitweb/?a=blobdiff_plain;f=lib%2Fprefetch.h;h=8c97906d8630f85ca4435f146483edc16aae025a;hb=ccc6aa0a17952f8dacc0edd60de8e5aa11e2df60;hp=46d10ca328cf0f101867c9cf64fa0191b7431431;hpb=cad27e97e6370f96903d42aaf345c099af0a03bd;p=libucw.git

diff --git a/lib/prefetch.h b/lib/prefetch.h
index 46d10ca3..8c97906d 100644
--- a/lib/prefetch.h
+++ b/lib/prefetch.h
@@ -1,7 +1,7 @@
 /*
  *	UCW Library -- Prefetch
  *
- *	(c) 1997--2003 Martin Mares <mj@ucw.cz>
+ *	(c) 1997--2005 Martin Mares <mj@ucw.cz>
  *
  *	This software may be freely distributed and used according to the terms
  *	of the GNU Lesser General Public License.
@@ -10,23 +10,33 @@
 #ifndef _UCW_PREFETCH_H
 #define _UCW_PREFETCH_H
 
-#if defined(__athlon) || defined(__i686)
+#if defined(__pentium4)
 
+#define HAVE_PREFETCH
 static inline void prefetch(void *addr)
 {
   asm volatile ("prefetcht0 %0" : : "m" (*(byte*)addr));
 }
 
-#else
+#elif defined(__k6)
+  /* K6 doesn't have prefetches */
+
+#elif defined(__athlon) || defined(__i686)
 
-#if !defined(__k6)
+#define HAVE_PREFETCH
+static inline void prefetch(void *addr)
+{
+  asm volatile ("prefetcht0 %0" : : "m" (*(byte*)addr));
+}
+
+#else
 #warning "Don't know how to prefetch on your CPU. Please fix lib/prefetch.h."
 #endif
 
+#ifndef HAVE_PREFETCH
 static inline void prefetch(void *addr UNUSED)
 {
 }
-
 #endif
 
 #endif