split bswap.h into per-arch files

Originally committed as revision 15663 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 51 insertions, 0 deletions

diff --git a/libavutil/arm/bswap.h b/libavutil/arm/bswap.h
new file mode 100644
index 0000000000..deb739407b
--- /dev/null
+++ b/libavutil/arm/bswap.h
@@ -0,0 +1,51 @@
+/*
+ * 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_ARM_BSWAP_H
+#define AVUTIL_ARM_BSWAP_H
+
+#include <stdint.h>
+#include "config.h"
+#include "libavutil/common.h"
+
+#ifdef HAVE_ARMV6
+#define bswap_16 bswap_16
+static av_always_inline av_const uint16_t bswap_16(uint16_t x)
+{
+    __asm__("rev16 %0, %0" : "+r"(x));
+    return x;
+}
+#endif
+
+#define bswap_32 bswap_32
+static av_always_inline av_const uint32_t bswap_32(uint32_t x)
+{
+#ifdef HAVE_ARMV6
+    __asm__("rev %0, %0" : "+r"(x));
+#else
+    uint32_t t;
+    __asm__ ("eor %1, %0, %0, ror #16 \n\t"
+             "bic %1, %1, #0xFF0000   \n\t"
+             "mov %0, %0, ror #8      \n\t"
+             "eor %0, %0, %1, lsr #8  \n\t"
+             : "+r"(x), "=&r"(t));
+#endif /* HAVE_ARMV6 */
+    return x;
+}
+
+#endif /* AVUTIL_ARM_BSWAP_H */