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103 lines
2.9 KiB
103 lines
2.9 KiB
/* |
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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 <stdint.h> |
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#include "config.h" |
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#include "libavutil/attributes.h" |
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#if HAVE_INLINE_ASM |
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#if HAVE_ARMV6 |
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#define FASTDIV FASTDIV |
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static av_always_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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#define av_clip_uint8 av_clip_uint8_arm |
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static av_always_inline av_const uint8_t av_clip_uint8_arm(int a) |
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{ |
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unsigned x; |
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__asm__ volatile ("usat %0, #8, %1" : "=r"(x) : "r"(a)); |
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return x; |
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} |
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#define av_clip_int8 av_clip_int8_arm |
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static av_always_inline av_const uint8_t av_clip_int8_arm(int a) |
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{ |
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unsigned x; |
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__asm__ volatile ("ssat %0, #8, %1" : "=r"(x) : "r"(a)); |
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return x; |
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} |
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#define av_clip_uint16 av_clip_uint16_arm |
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static av_always_inline av_const uint16_t av_clip_uint16_arm(int a) |
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{ |
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unsigned x; |
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__asm__ volatile ("usat %0, #16, %1" : "=r"(x) : "r"(a)); |
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return x; |
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} |
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#define av_clip_int16 av_clip_int16_arm |
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static av_always_inline av_const int16_t av_clip_int16_arm(int a) |
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{ |
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int x; |
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__asm__ volatile ("ssat %0, #16, %1" : "=r"(x) : "r"(a)); |
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return x; |
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} |
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#else /* HAVE_ARMV6 */ |
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#define FASTDIV FASTDIV |
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static av_always_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 /* HAVE_ARMV6 */ |
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#define av_clipl_int32 av_clipl_int32_arm |
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static av_always_inline av_const int32_t av_clipl_int32_arm(int64_t a) |
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{ |
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int x, y; |
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__asm__ volatile ("adds %1, %R2, %Q2, lsr #31 \n\t" |
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"mvnne %1, #1<<31 \n\t" |
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"eorne %0, %1, %R2, asr #31 \n\t" |
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: "=r"(x), "=&r"(y) : "r"(a)); |
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return x; |
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} |
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#endif /* HAVE_INLINE_ASM */ |
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#endif /* AVUTIL_ARM_INTMATH_H */
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