1 files changed, 15 insertions, 26 deletions

diff --git a/libgo/runtime/go-memclr.c b/libgo/runtime/go-memclr.c
index 53b8117..84df98d 100644
--- a/libgo/runtime/go-memclr.c
+++ b/libgo/runtime/go-memclr.c
@@ -11,50 +11,39 @@ void memclrNoHeapPointers(void *, uintptr)
   __attribute__ ((no_split_stack));
 
 void
-memclrNoHeapPointers (void *p1, uintptr len)
+memclrNoHeapPointers(void *p1, uintptr len)
 {
-
-#if !defined(__PPC64__)
-  __builtin_memset(p1, 0, len);
-#else
-  int64 rem,drem,i;
-  uint64 offset;
-  volatile uint64 *vp;
+  const uintptr ptr_size = sizeof(p1);
+  uintptr rem,drem,i;
+  uintptr offset;
+  volatile uintptr *vp;
 
   if (len == 0) {
     return;
   }
   rem = len;
 
-  offset = (uint64)p1 % 8;
-  // This memset is OK since it can't contain
-  // an 8 byte aligned pointer.
-  if ((rem < 8) || (offset > 0 && offset+rem <= 16)) {
+  offset = (uintptr)p1 % ptr_size;
+  if (rem < ptr_size || offset > 0) {
+    // This memset is OK since it can't contain
+    // an pointer aligned pointer.
     __builtin_memset(p1, 0, rem);
     return;
   }
-  // Move initial bytes to get to 8 byte boundary
-  if (offset > 0) {
-    __builtin_memset(p1, 0, 8-offset);
-    p1 = (void*)((char*)p1+8-offset);
-    rem -= 8-offset;
-  }
 
-  // If at least 8 bytes left, clear
-  drem = rem>>3;
+  drem = rem / ptr_size;
 
-  vp = (volatile uint64*)(p1);
+  vp = (volatile uintptr*)(p1);
   // Without the use of volatile here, the compiler
   // might convert the loop into a memset.
   for (i=0; i<drem; i++) {
     *vp = 0;
     vp++;
-    rem -= 8;
+    rem -= ptr_size;
   }
-  p1 = (void*)((char*)p1 + 8*drem);
-  // Clear any remaining
+  // Clear any remaining bytes.
   if (rem > 0) {
-    __builtin_memset (p1, 0, rem);
+    p1 = (void*)((char*)p1 + ptr_size*drem);
+    __builtin_memset(p1, 0, rem);
   }
-#endif
 }