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authorJanne Grunau <janne-libav@jannau.net>2013-11-25 16:58:54 +0100
committerJanne Grunau <janne-libav@jannau.net>2014-01-14 22:19:38 +0100
commitd0cd2a8c461f975eeaeff2900e95fa8ec0931ef8 (patch)
treeca6f210cccc26807e2d0509932202a2b8ba85403 /libavutil/aarch64
parent032d4da8af353e32ab5c86ee3a210f6065921a4a (diff)
aarch64: bswap inline assembly
Signed-off-by: Janne Grunau <janne-libav@jannau.net>
Diffstat (limited to 'libavutil/aarch64')
-rw-r--r--libavutil/aarch64/bswap.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/libavutil/aarch64/bswap.h b/libavutil/aarch64/bswap.h
new file mode 100644
index 0000000000..0c001cec19
--- /dev/null
+++ b/libavutil/aarch64/bswap.h
@@ -0,0 +1,50 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_AARCH64_BSWAP_H
+#define AVUTIL_AARCH64_BSWAP_H
+
+#include <stdint.h>
+#include "config.h"
+#include "libavutil/attributes.h"
+
+#if HAVE_INLINE_ASM
+
+#define av_bswap16 av_bswap16
+static av_always_inline av_const unsigned av_bswap16(unsigned x)
+{
+ __asm__("rev16 %w0, %w0" : "+r"(x));
+ return x;
+}
+
+#define av_bswap32 av_bswap32
+static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
+{
+ __asm__("rev %w0, %w0" : "+r"(x));
+ return x;
+}
+
+#define av_bswap64 av_bswap64
+static av_always_inline av_const uint64_t av_bswap64(uint64_t x)
+{
+ __asm__("rev %0, %0" : "+r"(x));
+ return x;
+}
+
+#endif /* HAVE_INLINE_ASM */
+#endif /* AVUTIL_AARCH64_BSWAP_H */