Browse code
MIPS: inline asm for intreadwrite.h
Originally committed as revision 18980 to svn://svn.ffmpeg.org/ffmpeg/trunk
Måns Rullgård authored on 2009/05/29 08:19:35Showing 2 changed files
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+/* |
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+ * Copyright (c) 2009 Mans Rullgard <mans@mansr.com> |
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+ * |
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+ * This file is part of FFmpeg. |
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+ * |
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+ * FFmpeg is free software; you can redistribute it and/or |
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+ * modify it under the terms of the GNU Lesser General Public |
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+ * License as published by the Free Software Foundation; either |
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+ * version 2.1 of the License, or (at your option) any later version. |
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+ * |
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+ * FFmpeg is distributed in the hope that it will be useful, |
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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+ * Lesser General Public License for more details. |
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+ * |
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+ * You should have received a copy of the GNU Lesser General Public |
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+ * License along with FFmpeg; if not, write to the Free Software |
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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+ */ |
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+ |
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+#ifndef AVUTIL_MIPS_INTREADWRITE_H |
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+#define AVUTIL_MIPS_INTREADWRITE_H |
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+ |
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+#include <stdint.h> |
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+#include "config.h" |
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+ |
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+#define AV_RN32 AV_RN32 |
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+static inline uint32_t AV_RN32(const void *p) |
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+{
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+ uint32_t v; |
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+ __asm__ ("lwl %0, %1 \n\t"
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+ "lwr %0, %2 \n\t" |
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+ : "=&r"(v) |
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+ : "m"(*(const uint32_t *)((const uint8_t *)p+3*!HAVE_BIGENDIAN)), |
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+ "m"(*(const uint32_t *)((const uint8_t *)p+3*HAVE_BIGENDIAN))); |
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+ return v; |
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+} |
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+ |
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+#define AV_WN32 AV_WN32 |
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+static inline void AV_WN32(void *p, uint32_t v) |
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+{
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+ __asm__ ("swl %2, %0 \n\t"
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+ "swr %2, %1 \n\t" |
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+ : "=m"(*(uint32_t *)((uint8_t *)p+3*!HAVE_BIGENDIAN)), |
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+ "=m"(*(uint32_t *)((uint8_t *)p+3*HAVE_BIGENDIAN)) |
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+ : "r"(v)); |
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+} |
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+ |
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+#if ARCH_MIPS64 |
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+ |
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+#define AV_RN64 AV_RN64 |
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+static inline uint64_t AV_RN64(const void *p) |
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+{
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+ uint64_t v; |
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+ __asm__ ("lwl %0, %1 \n\t"
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+ "lwr %0, %2 \n\t" |
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+ : "=&r"(v) |
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+ : "m"(*(const uint64_t *)((const uint8_t *)p+3*!HAVE_BIGENDIAN)), |
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+ "m"(*(const uint64_t *)((const uint8_t *)p+3*HAVE_BIGENDIAN))); |
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+ return v; |
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+} |
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+ |
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+#define AV_WN64 AV_WN64 |
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+static inline void AV_WN64(void *p, uint64_t v) |
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+{
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+ __asm__ ("swl %2, %0 \n\t"
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+ "swr %2, %1 \n\t" |
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+ : "=m"(*(uint64_t *)((uint8_t *)p+7*!HAVE_BIGENDIAN)), |
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+ "=m"(*(uint64_t *)((uint8_t *)p+7*HAVE_BIGENDIAN)) |
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+ : "r"(v)); |
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+} |
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+ |
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+#else |
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+ |
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+#define AV_RN64 AV_RN64 |
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+static inline uint64_t AV_RN64(const void *p) |
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+{
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+ union { uint64_t v; uint32_t hl[2]; } v;
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+ v.hl[0] = AV_RN32(p); |
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+ v.hl[1] = AV_RN32((const uint8_t *)p + 4); |
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+ return v.v; |
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+} |
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+ |
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+#define AV_WN64 AV_WN64 |
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+static inline void AV_WN64(void *p, uint64_t v) |
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+{
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+ union { uint64_t v; uint32_t hl[2]; } vv = { v };
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+ AV_WN32(p, vv.hl[0]); |
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+ AV_WN32((uint8_t *)p + 4, vv.hl[1]); |
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+} |
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+ |
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+#endif /* ARCH_MIPS64 */ |
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+ |
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+#endif /* AVUTIL_MIPS_INTREADWRITE_H */ |