[PATCH] ppc32 dl-machine.c

[Geoff Keating]

The original proposed patch was something like:

--- glibc-2.2.5/sysdeps/powerpc/dl-machine.c~	Sun Sep  9 07:21:34
    2001
+++ glibc-2.2.5/sysdeps/powerpc/dl-machine.c	Fri May 10 12:58:04
    2002
@@ -311,7 +311,8 @@
   PPC_DCBST (plt + i);
       PPC_DCBST (plt + size_modified - 1);
       PPC_SYNC;
-      PPC_ICBI (plt);
+      for (i = 0; i < size_modified; i += 4)
+        PPC_ICBI (plt + i);
       PPC_ICBI (plt + size_modified - 1);
       PPC_ISYNC;
     }

your patch looks much less efficient.  Can you explain the
differences?

Please remember, PPC_SYNC is a very expensive operation.  It 
requires a bus broadcast and therefore takes tens of cycles.

-- 
- Geoffrey Keating <geoffk@geoffk.org>