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/*
* Copyright (c) 2012
* MIPS Technologies, Inc., California.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Author: Nedeljko Babic (nbabic@mips.com)
*
* LSP routines for ACELP-based codecs optimized for MIPS
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Reference: libavcodec/lsp.c
*/
#ifndef AVCODEC_LSP_MIPS_H
#define AVCODEC_LSP_MIPS_H
#if HAVE_MIPSFPU && HAVE_INLINE_ASM
#include "libavutil/mips/asmdefs.h"
static av_always_inline void ff_lsp2polyf_mips(const double *lsp, double *f, int lp_half_order)
{
int i, j = 0;
double * p_fi = f;
double * p_f = 0;
f[0] = 1.0;
f[1] = -2 * lsp[0];
lsp -= 2;
for(i=2; i<=lp_half_order; i++)
{
double tmp, f_j_2, f_j_1, f_j;
double val = lsp[2*i];
__asm__ volatile(
"move %[p_f], %[p_fi] \n\t"
"add.d %[val], %[val], %[val] \n\t"
PTR_ADDIU "%[p_fi], 8 \n\t"
"ldc1 %[f_j_1], 0(%[p_f]) \n\t"
"ldc1 %[f_j], 8(%[p_f]) \n\t"
"neg.d %[val], %[val] \n\t"
"add.d %[tmp], %[f_j_1], %[f_j_1] \n\t"
"madd.d %[tmp], %[tmp], %[f_j], %[val] \n\t"
"addiu %[j], %[i], -2 \n\t"
"ldc1 %[f_j_2], -8(%[p_f]) \n\t"
"sdc1 %[tmp], 16(%[p_f]) \n\t"
"beqz %[j], ff_lsp2polyf_lp_j_end%= \n\t"
"ff_lsp2polyf_lp_j%=: \n\t"
"add.d %[tmp], %[f_j], %[f_j_2] \n\t"
"madd.d %[tmp], %[tmp], %[f_j_1], %[val] \n\t"
"mov.d %[f_j], %[f_j_1] \n\t"
"addiu %[j], -1 \n\t"
"mov.d %[f_j_1], %[f_j_2] \n\t"
"ldc1 %[f_j_2], -16(%[p_f]) \n\t"
"sdc1 %[tmp], 8(%[p_f]) \n\t"
PTR_ADDIU "%[p_f], -8 \n\t"
"bgtz %[j], ff_lsp2polyf_lp_j%= \n\t"
"ff_lsp2polyf_lp_j_end%=: \n\t"
: [f_j_2]"=&f"(f_j_2), [f_j_1]"=&f"(f_j_1), [val]"+f"(val),
[tmp]"=&f"(tmp), [f_j]"=&f"(f_j), [p_f]"+r"(p_f),
[j]"+r"(j), [p_fi]"+r"(p_fi)
: [i]"r"(i)
: "memory"
);
f[1] += val;
}
}
#define ff_lsp2polyf ff_lsp2polyf_mips
#endif /* HAVE_MIPSFPU && HAVE_INLINE_ASM */
#endif /* AVCODEC_LSP_MIPS_H */
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