Various speedups: (1) Put actual decoding functions into IRAM on PP5002. (2) Put the insane filter buffer into IRAM on coldfire and PP502x (just for completeness, as long as there's no better use). (3) Use the ARMv6 'ssat' instruction for saturation on Gigabeat S.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18701 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 42 insertions, 0 deletions

diff --git a/apps/codecs/demac/libdemac/demac_iram.h b/apps/codecs/demac/libdemac/demac_iram.h
new file mode 100644
index 0000000000..fb6965a35e
--- /dev/null
+++ b/apps/codecs/demac/libdemac/demac_iram.h
@@ -0,0 +1,42 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 Jens Arnold
+ *
+ * This program 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
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+/* Define how IRAM is used on the various targets.  Note that this file
+ * is included by both .c and .S files so must not contain any C code. */
+
+#ifndef _LIBDEMAC_IRAM_H
+#define _LIBDEMAC_IRAM_H
+
+#include "config.h"
+
+/* On PP5002 code should go into IRAM. Otherwise put the insane
+ * filter buffer into IRAM as long as there is no better use. */
+#if CONFIG_CPU == PP5002
+#define ICODE_SECTION_DEMAC_ARM   .icode
+#define ICODE_ATTR_DEMAC          ICODE_ATTR
+#define IBSS_ATTR_DEMAC_INSANEBUF
+#else
+#define ICODE_SECTION_DEMAC_ARM   .text
+#define ICODE_ATTR_DEMAC
+#define IBSS_ATTR_DEMAC_INSANEBUF IBSS_ATTR
+#endif
+
+#endif /* _LIBDEMAC_IRAM_H */