GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/x86/vp56_arith.h Lines: 9 9 100.0 %
Date: 2020-09-25 23:16:12 Branches: 0 0 - %

Line Branch Exec Source
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/**
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 * VP5 and VP6 compatible video decoder (arith decoder)
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 *
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 * Copyright (C) 2006  Aurelien Jacobs <aurel@gnuage.org>
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 * Copyright (C) 2010  Eli Friedman
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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 AVCODEC_X86_VP56_ARITH_H
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#define AVCODEC_X86_VP56_ARITH_H
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#if HAVE_INLINE_ASM && HAVE_FAST_CMOV && HAVE_6REGS
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#define vp56_rac_get_prob vp56_rac_get_prob
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static av_always_inline int vp56_rac_get_prob(VP56RangeCoder *c, uint8_t prob)
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{
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    unsigned int code_word = vp56_rac_renorm(c);
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    unsigned int low = 1 + (((c->high - 1) * prob) >> 8);
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    unsigned int low_shift = low << 16;
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    int bit = 0;
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    c->code_word = code_word;
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    __asm__(
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        "subl  %4, %1      \n\t"
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        "subl  %3, %2      \n\t"
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        "setae %b0         \n\t"
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        "cmovb %4, %1      \n\t"
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        "cmovb %5, %2      \n\t"
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        : "+q"(bit), "+&r"(c->high), "+&r"(c->code_word)
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        : "r"(low_shift), "r"(low), "r"(code_word)
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    );
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    return bit;
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}
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#endif
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#endif /* AVCODEC_X86_VP56_ARITH_H */