forked from KolibriOS/kolibrios
110 lines
4.8 KiB
C
110 lines
4.8 KiB
C
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/*
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* Copyright (c) 2012
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* MIPS Technologies, Inc., California.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Author: Nedeljko Babic (nbabic@mips.com)
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*
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* LSP routines for ACELP-based codecs optimized for MIPS
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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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* @file
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* Reference: libavcodec/lsp.c
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*/
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#ifndef AVCODEC_LSP_MIPS_H
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#define AVCODEC_LSP_MIPS_H
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#if HAVE_MIPSFPU && HAVE_INLINE_ASM
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static av_always_inline void ff_lsp2polyf_mips(const double *lsp, double *f, int lp_half_order)
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{
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int i, j = 0;
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double * p_fi = f;
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double * p_f = 0;
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f[0] = 1.0;
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f[1] = -2 * lsp[0];
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lsp -= 2;
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for(i=2; i<=lp_half_order; i++)
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{
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double tmp, f_j_2, f_j_1, f_j;
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double val = lsp[2*i];
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__asm__ volatile(
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"move %[p_f], %[p_fi] \n\t"
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"add.d %[val], %[val], %[val] \n\t"
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"addiu %[p_fi], 8 \n\t"
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"ldc1 %[f_j_1], 0(%[p_f]) \n\t"
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"ldc1 %[f_j], 8(%[p_f]) \n\t"
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"neg.d %[val], %[val] \n\t"
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"add.d %[tmp], %[f_j_1], %[f_j_1] \n\t"
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"madd.d %[tmp], %[tmp], %[f_j], %[val] \n\t"
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"addiu %[j], %[i], -2 \n\t"
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"ldc1 %[f_j_2], -8(%[p_f]) \n\t"
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"sdc1 %[tmp], 16(%[p_f]) \n\t"
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"beqz %[j], ff_lsp2polyf_lp_j_end%= \n\t"
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"ff_lsp2polyf_lp_j%=: \n\t"
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"add.d %[tmp], %[f_j], %[f_j_2] \n\t"
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"madd.d %[tmp], %[tmp], %[f_j_1], %[val] \n\t"
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"mov.d %[f_j], %[f_j_1] \n\t"
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"addiu %[j], -1 \n\t"
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"mov.d %[f_j_1], %[f_j_2] \n\t"
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"ldc1 %[f_j_2], -16(%[p_f]) \n\t"
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"sdc1 %[tmp], 8(%[p_f]) \n\t"
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"addiu %[p_f], -8 \n\t"
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"bgtz %[j], ff_lsp2polyf_lp_j%= \n\t"
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"ff_lsp2polyf_lp_j_end%=: \n\t"
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: [f_j_2]"=&f"(f_j_2), [f_j_1]"=&f"(f_j_1), [val]"+f"(val),
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[tmp]"=&f"(tmp), [f_j]"=&f"(f_j), [p_f]"+r"(p_f),
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[j]"+r"(j), [p_fi]"+r"(p_fi)
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: [i]"r"(i)
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: "memory"
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);
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f[1] += val;
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}
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}
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#define ff_lsp2polyf ff_lsp2polyf_mips
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#endif /* HAVE_MIPSFPU && HAVE_INLINE_ASM */
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#endif /* AVCODEC_LSP_MIPS_H */
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