Enable prefetch loop in GC_mark_from on E2K

Issue #411 (bdwgc).

* mark.c [!SMALL_CONFIG && !USE_PTR_HWTAG] (GC_mark_from): Perform
prefetching loop (even for E2K); remove TODO item.

1 files changed, 2 insertions, 3 deletions

diff --git a/mark.c b/mark.c
index 861c06e0..d1015813 100644
--- a/mark.c
+++ b/mark.c
@@ -800,8 +800,7 @@ GC_INNER mse * GC_mark_from(mse *mark_stack_top, mse *mark_stack,
     {
 #     define PREF_DIST 4
 
-#     if !defined(SMALL_CONFIG) && !defined(E2K)
-        /* TODO: enable prefetching for E2K? */
+#     if !defined(SMALL_CONFIG) && !defined(USE_PTR_HWTAG)
         word deferred;
 
         /* Try to prefetch the next pointer to be examined ASAP.        */
@@ -857,7 +856,7 @@ GC_INNER mse * GC_mark_from(mse *mark_stack_top, mse *mark_stack,
         }
       }
 
-#     if !defined(SMALL_CONFIG) && !defined(E2K)
+#     if !defined(SMALL_CONFIG) && !defined(USE_PTR_HWTAG)
         /* We still need to mark the entry we previously prefetched.    */
         /* We already know that it passes the preliminary pointer       */
         /* validity test.                                               */