2 * Copyright (c) 2009 Mans Rullgard <mans@mansr.com>
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVUTIL_MIPS_INTREADWRITE_H
22 #define AVUTIL_MIPS_INTREADWRITE_H
28 * GCC actually handles unaligned accesses correctly in all cases
29 * except, absurdly, 32-bit loads on mips64.
31 * https://git.libav.org/?p=libav.git;a=commit;h=b82b49a5b774b6ad9119e981c72b8f594fee2ae0
33 #if HAVE_MIPS64R2_INLINE || HAVE_MIPS64R1_INLINE
35 #define AV_RN32 AV_RN32
36 static av_always_inline uint32_t AV_RN32(const void *p)
38 struct __attribute__((packed)) u32 { uint32_t v; };
40 const struct u32 *pl = (const struct u32 *)(q + 3 * !HAVE_BIGENDIAN);
41 const struct u32 *pr = (const struct u32 *)(q + 3 * HAVE_BIGENDIAN);
43 __asm__ ("lwl %0, %1 \n\t"
46 : "m"(*pl), "m"(*pr));
50 #endif /* HAVE_MIPS64R2_INLINE || HAVE_MIPS64R1_INLINE */
52 #endif /* AVUTIL_MIPS_INTREADWRITE_H */