From: Ulrich Drepper <drepper@redhat.com>
Date: Tue, 10 Apr 2001 00:23:12 +0000 (+0000)
Subject: Definitions for efficient copying on CRIS.
X-Git-Tag: upstream/2.30~10627^2~1933
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e9ca92e3b227617f9717bc784c3dafc532f555e4;p=external%2Fglibc.git

Definitions for efficient copying on CRIS.
---

diff --git a/sysdeps/cris/memcopy.h b/sysdeps/cris/memcopy.h
new file mode 100644
index 0000000..7bcf634
--- /dev/null
+++ b/sysdeps/cris/memcopy.h
@@ -0,0 +1,57 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sysdeps/generic/memcopy.h>
+
+/* We override the word-copying macros, partly because misalignment in one
+   pointer isn't cause for a special function, partly because we want to
+   get rid of wordcopy.c; these macros are only used in memmove.c (and
+   it's sibling bcopy) since we have arch-specific mempcpy, memcpy and
+   memset.  */
+
+#undef OP_T_THRES
+#define OP_T_THRES OPSIZ
+
+#define WORD_COPY_FWD(dst_bp, src_bp, nbytes_left, nbytes)		\
+  do									\
+    {									\
+      unsigned long enddst_bp = dst_bp + nbytes - (nbytes % OPSIZ);	\
+      nbytes_left = (nbytes % OPSIZ);					\
+      while (dst_bp < (unsigned long) enddst_bp)			\
+	{								\
+	  op_t x = *(op_t *) src_bp;					\
+	  src_bp += sizeof x;						\
+	  *(op_t *) dst_bp = x;						\
+	  dst_bp += sizeof x;						\
+	}								\
+    } while (0)
+
+#define WORD_COPY_BWD(dst_bp, src_bp, nbytes_left, nbytes)		\
+  do									\
+    {									\
+      unsigned long enddst_bp = dst_bp - nbytes + (nbytes % OPSIZ);	\
+      nbytes_left = (nbytes % OPSIZ);					\
+      while (dst_bp > enddst_bp)					\
+	{								\
+	  op_t x;							\
+	  src_bp -= sizeof x;						\
+	  x = *(op_t *) src_bp;						\
+	  dst_bp -= sizeof x;						\
+	  *(op_t *) dst_bp = x;						\
+	}								\
+    } while (0)