1 files changed, 59 insertions, 0 deletions

diff --git a/firmware/libc/include/endian.h b/firmware/libc/include/endian.h
new file mode 100644
index 0000000000..de1c508da7
--- /dev/null
+++ b/firmware/libc/include/endian.h
@@ -0,0 +1,59 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Alan Korr
+ *
+ * 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.
+ *
+ ****************************************************************************/
+#ifndef _ENDIAN_H_
+#define _ENDIAN_H_
+
+#ifndef _RBENDIAN_H_
+/* this only defines what may be substituted in the native endian.h */
+#error "Include rbendian.h instead."
+#endif
+
+#define __ENDIAN_H_NATIVE_RB
+
+#ifdef NEED_GENERIC_BYTESWAPS
+static inline uint16_t swap16_hw(uint16_t value)
+    /*
+     * result[15..8] = value[ 7..0];
+     * result[ 7..0] = value[15..8];
+     */
+{
+    return (value >> 8) | (value << 8);
+}
+
+static inline uint32_t swap32_hw(uint32_t value)
+    /*
+     * result[31..24] = value[ 7.. 0];
+     * result[23..16] = value[15.. 8];
+     * result[15.. 8] = value[23..16];
+     * result[ 7.. 0] = value[31..24];
+     */
+{
+    uint32_t hi = swap16_hw(value >> 16);
+    uint32_t lo = swap16_hw(value & 0xffff);
+    return (lo << 16) | hi;
+}
+#endif /* NEED_GENERIC_BYTESWAPS */
+
+static FORCE_INLINE uint64_t swap64_hw(uint64_t x)
+  { return swap32_hw((uint32_t)(x >> 32)) |
+           ((uint64_t)swap32_hw((uint32_t)x) << 32); }
+
+#endif /* _ENDIAN_H_ */