AVR32: inline asm for bswap.h

Originally committed as revision 19664 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/avr32/bswap.h

+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AVR32_BSWAP_H
+#define AVUTIL_AVR32_BSWAP_H
+
+#include <stdint.h>
+#include "config.h"
+#include "libavutil/common.h"
+
+#if HAVE_INLINE_ASM
+
+#define bswap_16 bswap_16
+static av_always_inline av_const uint16_t bswap_16(uint16_t x)
+{
+    __asm__ ("swap.bh %0" : "+r"(x));
+    return x;
+}
+
+#define bswap_32 bswap_32
+static av_always_inline av_const uint32_t bswap_32(uint32_t x)
+{
+    __asm__ ("swap.b  %0" : "+r"(x));
+    return x;
+}
+
+#endif /* HAVE_INLINE_ASM */
+
+#endif /* AVUTIL_AVR32_BSWAP_H */

libavutil/bswap.h

@@ -32,6 +32,8 @@
 
 #if   ARCH_ARM
 #   include "arm/bswap.h"
+#elif ARCH_AVR32
+#   include "avr32/bswap.h"
 #elif ARCH_BFIN
 #   include "bfin/bswap.h"
 #elif ARCH_SH4