Revision 75fb5c24
| libavutil/arm/intmath.h | ||
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/* |
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* Copyright (c) 2010 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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#ifndef AVUTIL_ARM_INTMATH_H |
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#define AVUTIL_ARM_INTMATH_H |
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#include "config.h" |
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#include "libavutil/common.h" |
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#if HAVE_INLINE_ASM |
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#if HAVE_ARMV6 |
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static inline av_const int FASTDIV(int a, int b) |
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{
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int r, t; |
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__asm__ volatile("cmp %3, #2 \n\t"
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"ldr %1, [%4, %3, lsl #2] \n\t" |
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"lsrle %0, %2, #1 \n\t" |
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"smmulgt %0, %1, %2 \n\t" |
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: "=&r"(r), "=&r"(t) : "r"(a), "r"(b), "r"(ff_inverse)); |
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return r; |
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} |
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#else |
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static inline av_const int FASTDIV(int a, int b) |
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{
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int r, t; |
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__asm__ volatile("umull %1, %0, %2, %3"
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: "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b])); |
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return r; |
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} |
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#endif |
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#define FASTDIV FASTDIV |
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#endif /* HAVE_INLINE_ASM */ |
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#endif /* AVUTIL_ARM_INTMATH_H */ |
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| libavutil/internal.h | ||
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/* math */ |
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extern const uint32_t ff_inverse[257]; |
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#if ARCH_X86 |
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# define FASTDIV(a,b) \ |
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({\
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int ret, dmy;\ |
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__asm__ volatile(\ |
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"mull %3"\ |
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:"=d"(ret), "=a"(dmy)\ |
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:"1"(a), "g"(ff_inverse[b])\ |
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);\ |
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ret;\ |
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}) |
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#elif HAVE_ARMV6 && HAVE_INLINE_ASM |
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static inline av_const int FASTDIV(int a, int b) |
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{
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int r, t; |
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__asm__ volatile("cmp %3, #2 \n\t"
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"ldr %1, [%4, %3, lsl #2] \n\t" |
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"lsrle %0, %2, #1 \n\t" |
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"smmulgt %0, %1, %2 \n\t" |
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: "=&r"(r), "=&r"(t) : "r"(a), "r"(b), "r"(ff_inverse)); |
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return r; |
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} |
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#elif ARCH_ARM && HAVE_INLINE_ASM |
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static inline av_const int FASTDIV(int a, int b) |
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{
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int r, t; |
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__asm__ volatile("umull %1, %0, %2, %3"
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: "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b])); |
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return r; |
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} |
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#elif CONFIG_FASTDIV |
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# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a) * ff_inverse[b]) >> 32)) |
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#else |
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# define FASTDIV(a,b) ((a) / (b)) |
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#endif |
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extern const uint8_t ff_sqrt_tab[256]; |
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static inline av_const unsigned int ff_sqrt(unsigned int a) |
| libavutil/intmath.h | ||
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#include "config.h" |
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#include "common.h" |
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extern const uint32_t ff_inverse[257]; |
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#if ARCH_ARM |
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# include "arm/intmath.h" |
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#elif ARCH_X86 |
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# include "x86/intmath.h" |
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#endif |
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#if HAVE_FAST_CLZ && AV_GCC_VERSION_AT_LEAST(3,4) |
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#ifndef av_log2 |
| ... | ... | |
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#endif /* AV_GCC_VERSION_AT_LEAST(3,4) */ |
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#ifndef FASTDIV |
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#if CONFIG_FASTDIV |
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# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a) * ff_inverse[b]) >> 32)) |
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#else |
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# define FASTDIV(a,b) ((a) / (b)) |
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#endif |
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#endif /* FASTDIV */ |
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#endif /* AVUTIL_INTMATH_H */ |
| libavutil/x86/intmath.h | ||
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/* |
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* Copyright (c) 2010 Mans Rullgard <mans@mansr.com> |
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* |
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| 4 |
* This file is part of FFmpeg. |
|
| 5 |
* |
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| 6 |
* FFmpeg 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. |
|
| 10 |
* |
|
| 11 |
* FFmpeg 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. |
|
| 15 |
* |
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* You should have received a copy of the GNU Lesser General Public |
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| 17 |
* 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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#ifndef AVUTIL_X86_INTMATH_H |
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#define AVUTIL_X86_INTMATH_H |
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#include "libavutil/common.h" |
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#define FASTDIV(a,b) \ |
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({\
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int ret, dmy;\ |
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__asm__ volatile(\ |
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"mull %3"\ |
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:"=d"(ret), "=a"(dmy)\ |
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:"1"(a), "g"(ff_inverse[b])\ |
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);\ |
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ret;\ |
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}) |
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#endif /* AVUTIL_X86_INTMATH_H */ |
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