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81 lines
2.2 KiB
81 lines
2.2 KiB
/* |
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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_RISCV_INTMATH_H |
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#define AVUTIL_RISCV_INTMATH_H |
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#include <stdint.h> |
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#include "config.h" |
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#include "libavutil/attributes.h" |
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/* |
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* The compiler is forced to sign-extend the result anyhow, so it is faster to |
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* compute it explicitly and use it. |
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*/ |
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#define av_clip_int8 av_clip_int8_rvi |
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static av_always_inline av_const int8_t av_clip_int8_rvi(int a) |
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{ |
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union { uint8_t u; int8_t s; } u = { .u = a }; |
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if (a != u.s) |
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a = ((a >> 31) ^ 0x7F); |
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return a; |
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} |
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#define av_clip_int16 av_clip_int16_rvi |
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static av_always_inline av_const int16_t av_clip_int16_rvi(int a) |
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{ |
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union { uint16_t u; int16_t s; } u = { .u = a }; |
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if (a != u.s) |
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a = ((a >> 31) ^ 0x7FFF); |
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return a; |
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} |
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#define av_clipl_int32 av_clipl_int32_rvi |
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static av_always_inline av_const int32_t av_clipl_int32_rvi(int64_t a) |
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{ |
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union { uint32_t u; int32_t s; } u = { .u = a }; |
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if (a != u.s) |
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a = ((a >> 63) ^ 0x7FFFFFFF); |
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return a; |
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} |
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#define av_clip_intp2 av_clip_intp2_rvi |
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static av_always_inline av_const int av_clip_intp2_rvi(int a, int p) |
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{ |
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const int shift = 31 - p; |
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int b = ((int)(((unsigned)a) << shift)) >> shift; |
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if (a != b) |
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b = (a >> 31) ^ ((1 << p) - 1); |
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return b; |
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} |
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#if defined (__GNUC__) || defined (__clang__) |
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#define av_popcount __builtin_popcount |
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#if (__riscv_xlen >= 64) |
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#define av_popcount64 __builtin_popcountl |
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#else |
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#define av_popcount64 __builtin_popcountll |
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#endif |
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#endif |
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#endif /* AVUTIL_RISCV_INTMATH_H */
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