MIPS: inline asm for intreadwrite.h

Originally committed as revision 18980 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 94 insertions, 0 deletions

diff --git a/libavutil/mips/intreadwrite.h b/libavutil/mips/intreadwrite.h
new file mode 100644
index 0000000000..56df931d96
--- /dev/null
+++ b/libavutil/mips/intreadwrite.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
+ *
+ * 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_MIPS_INTREADWRITE_H
+#define AVUTIL_MIPS_INTREADWRITE_H
+
+#include <stdint.h>
+#include "config.h"
+
+#define AV_RN32 AV_RN32
+static inline uint32_t AV_RN32(const void *p)
+{
+    uint32_t v;
+    __asm__ ("lwl %0, %1  \n\t"
+             "lwr %0, %2  \n\t"
+             : "=&r"(v)
+             : "m"(*(const uint32_t *)((const uint8_t *)p+3*!HAVE_BIGENDIAN)),
+               "m"(*(const uint32_t *)((const uint8_t *)p+3*HAVE_BIGENDIAN)));
+    return v;
+}
+
+#define AV_WN32 AV_WN32
+static inline void AV_WN32(void *p, uint32_t v)
+{
+    __asm__ ("swl %2, %0  \n\t"
+             "swr %2, %1  \n\t"
+             : "=m"(*(uint32_t *)((uint8_t *)p+3*!HAVE_BIGENDIAN)),
+               "=m"(*(uint32_t *)((uint8_t *)p+3*HAVE_BIGENDIAN))
+             : "r"(v));
+}
+
+#if ARCH_MIPS64
+
+#define AV_RN64 AV_RN64
+static inline uint64_t AV_RN64(const void *p)
+{
+    uint64_t v;
+    __asm__ ("lwl %0, %1  \n\t"
+             "lwr %0, %2  \n\t"
+             : "=&r"(v)
+             : "m"(*(const uint64_t *)((const uint8_t *)p+3*!HAVE_BIGENDIAN)),
+               "m"(*(const uint64_t *)((const uint8_t *)p+3*HAVE_BIGENDIAN)));
+    return v;
+}
+
+#define AV_WN64 AV_WN64
+static inline void AV_WN64(void *p, uint64_t v)
+{
+    __asm__ ("swl %2, %0  \n\t"
+             "swr %2, %1  \n\t"
+             : "=m"(*(uint64_t *)((uint8_t *)p+7*!HAVE_BIGENDIAN)),
+               "=m"(*(uint64_t *)((uint8_t *)p+7*HAVE_BIGENDIAN))
+             : "r"(v));
+}
+
+#else
+
+#define AV_RN64 AV_RN64
+static inline uint64_t AV_RN64(const void *p)
+{
+    union { uint64_t v; uint32_t hl[2]; } v;
+    v.hl[0] = AV_RN32(p);
+    v.hl[1] = AV_RN32((const uint8_t *)p + 4);
+    return v.v;
+}
+
+#define AV_WN64 AV_WN64
+static inline void AV_WN64(void *p, uint64_t v)
+{
+    union { uint64_t v; uint32_t hl[2]; } vv = { v };
+    AV_WN32(p, vv.hl[0]);
+    AV_WN32((uint8_t *)p + 4, vv.hl[1]);
+}
+
+#endif /* ARCH_MIPS64 */
+
+#endif /* AVUTIL_MIPS_INTREADWRITE_H */