sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 63 insertions, 0 deletions

diff --git a/device/lib/_memmove.c b/device/lib/_memmove.c
new file mode 100644
index 0000000..8a7ce87
--- /dev/null
+++ b/device/lib/_memmove.c
@@ -0,0 +1,63 @@
+/*-------------------------------------------------------------------------
+   _memmove.c - part of string library functions
+
+   Copyright (C) 1999, Sandeep Dutta . sandeep.dutta@usa.net
+   Adapted By -  Erik Petrich  . epetrich@users.sourceforge.net
+   from _memcpy.c which was originally
+
+   This library is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the
+   Free Software Foundation; either version 2, or (at your option) any
+   later version.
+
+   This 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this library; see the file COPYING. If not, write to the
+   Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA.
+
+   As a special exception, if you link this library with other files,
+   some of which are compiled with SDCC, to produce an executable,
+   this library does not by itself cause the resulting executable to
+   be covered by the GNU General Public License. This exception does
+   not however invalidate any other reasons why the executable file
+   might be covered by the GNU General Public License.
+-------------------------------------------------------------------------*/
+#include <string.h>
+#include <stdint.h>
+#include <sdcc-lib.h>
+
+void * memmove (void * dst, const void * src, size_t acount)
+{
+	void * ret = dst;
+	char * d;
+	const char * s;
+
+	if ((uintptr_t)src < (uintptr_t)dst) {
+		/*
+		 * copy from higher addresses to lower addresses
+		 */
+		d = ((char *)dst)+acount-1;
+		s = ((char *)src)+acount-1;
+		while (acount--) {
+			*d-- = *s--;
+		}
+	}
+	else {
+		/*
+		 * copy from lower addresses to higher addresses
+		 */
+		d = dst;
+		s = src;
+		while (acount--) {
+			*d++ = *s++;
+		}
+	}
+
+	return(ret);
+}
+