Use glibc_likely instead __builtin_expect.

[thirdparty/glibc.git] / debug / memmove_chk.c

diff --git a/debug/memmove_chk.c b/debug/memmove_chk.c
index 5a304ef1b10627a194fd8edd629babc7a57d4d36..f8c445446297e83bde842897f4a71a8f9523e861 100644 (file)
--- a/debug/memmove_chk.c
+++ b/debug/memmove_chk.c
@@ -1,6 +1,6 @@
 /* Copy memory to memory until the specified number of bytes
    has been copied with error checking.  Overlap is handled correctly.
-   Copyright (C) 1991,1995,1996,1997,2003,2004 Free Software Foundation, Inc.
+   Copyright (C) 1991-2014 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Torbjorn Granlund (tege@sics.se).
 
@@ -33,69 +33,8 @@ MEMMOVE_CHK (dest, src, len, destlen)
      size_t len;
      size_t destlen;
 {
-  if (__builtin_expect (destlen < len, 0))
+  if (__glibc_unlikely (destlen < len))
     __chk_fail ();
 
-  unsigned long int dstp = (long int) dest;
-  unsigned long int srcp = (long int) src;
-
-  /* This test makes the forward copying code be used whenever possible.
-     Reduces the working set.  */
-  if (dstp - srcp >= len)      /* *Unsigned* compare!  */
-    {
-      /* Copy from the beginning to the end.  */
-
-      /* If there not too few bytes to copy, use word copy.  */
-      if (len >= OP_T_THRES)
-       {
-         /* Copy just a few bytes to make DSTP aligned.  */
-         len -= (-dstp) % OPSIZ;
-         BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);
-
-         /* Copy whole pages from SRCP to DSTP by virtual address
-            manipulation, as much as possible.  */
-
-         PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);
-
-         /* Copy from SRCP to DSTP taking advantage of the known
-            alignment of DSTP.  Number of bytes remaining is put
-            in the third argument, i.e. in LEN.  This number may
-            vary from machine to machine.  */
-
-         WORD_COPY_FWD (dstp, srcp, len, len);
-
-         /* Fall out and copy the tail.  */
-       }
-
-      /* There are just a few bytes to copy.  Use byte memory operations.  */
-      BYTE_COPY_FWD (dstp, srcp, len);
-    }
-  else
-    {
-      /* Copy from the end to the beginning.  */
-      srcp += len;
-      dstp += len;
-
-      /* If there not too few bytes to copy, use word copy.  */
-      if (len >= OP_T_THRES)
-       {
-         /* Copy just a few bytes to make DSTP aligned.  */
-         len -= dstp % OPSIZ;
-         BYTE_COPY_BWD (dstp, srcp, dstp % OPSIZ);
-
-         /* Copy from SRCP to DSTP taking advantage of the known
-            alignment of DSTP.  Number of bytes remaining is put
-            in the third argument, i.e. in LEN.  This number may
-            vary from machine to machine.  */
-
-         WORD_COPY_BWD (dstp, srcp, len, len);
-
-         /* Fall out and copy the tail.  */
-       }
-
-      /* There are just a few bytes to copy.  Use byte memory operations.  */
-      BYTE_COPY_BWD (dstp, srcp, len);
-    }
-
-  return dest;
+  return memmove (dest, src, len);
 }