1/*
2 * Copyright (c) 2012
3 *      MIPS Technologies, Inc., California.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
14 *    contributors may be used to endorse or promote products derived from
15 *    this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * Author:  Nedeljko Babic (nbabic@mips.com)
30 *
31 * LSP routines for ACELP-based codecs optimized for MIPS
32 *
33 * This file is part of FFmpeg.
34 *
35 * FFmpeg is free software; you can redistribute it and/or
36 * modify it under the terms of the GNU Lesser General Public
37 * License as published by the Free Software Foundation; either
38 * version 2.1 of the License, or (at your option) any later version.
39 *
40 * FFmpeg is distributed in the hope that it will be useful,
41 * but WITHOUT ANY WARRANTY; without even the implied warranty of
42 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
43 * Lesser General Public License for more details.
44 *
45 * You should have received a copy of the GNU Lesser General Public
46 * License along with FFmpeg; if not, write to the Free Software
47 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
48 */
49
50/**
51 * @file
52 * Reference: libavcodec/lsp.c
53 */
54#ifndef AVCODEC_MIPS_LSP_MIPS_H
55#define AVCODEC_MIPS_LSP_MIPS_H
56
57#include "config.h"
58
59#if HAVE_MIPSFPU && HAVE_INLINE_ASM
60#if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
61#include "libavutil/attributes.h"
62#include "libavutil/mips/asmdefs.h"
63
64static av_always_inline void ff_lsp2polyf_mips(const double *lsp, double *f, int lp_half_order)
65{
66    int i, j = 0;
67    double * p_fi = f;
68    double * p_f = 0;
69
70    f[0] = 1.0;
71    f[1] = -2 * lsp[0];
72    lsp -= 2;
73
74    for(i=2; i<=lp_half_order; i++)
75    {
76        double tmp, f_j_2, f_j_1, f_j;
77        double val = lsp[2*i];
78
79        __asm__ volatile(
80            "move   %[p_f],     %[p_fi]                         \n\t"
81            "add.d  %[val],     %[val],     %[val]              \n\t"
82            PTR_ADDIU "%[p_fi], 8                               \n\t"
83            "ldc1   %[f_j_1],   0(%[p_f])                       \n\t"
84            "ldc1   %[f_j],     8(%[p_f])                       \n\t"
85            "neg.d  %[val],     %[val]                          \n\t"
86            "add.d  %[tmp],     %[f_j_1],   %[f_j_1]            \n\t"
87            "madd.d %[tmp],     %[tmp],     %[f_j], %[val]      \n\t"
88            "addiu  %[j],       %[i], -2                        \n\t"
89            "ldc1   %[f_j_2],   -8(%[p_f])                      \n\t"
90            "sdc1   %[tmp],     16(%[p_f])                      \n\t"
91            "beqz   %[j],       ff_lsp2polyf_lp_j_end%=         \n\t"
92            "ff_lsp2polyf_lp_j%=:                               \n\t"
93            "add.d  %[tmp],     %[f_j],     %[f_j_2]            \n\t"
94            "madd.d %[tmp],     %[tmp],     %[f_j_1], %[val]    \n\t"
95            "mov.d  %[f_j],     %[f_j_1]                        \n\t"
96            "addiu  %[j],       -1                              \n\t"
97            "mov.d  %[f_j_1],   %[f_j_2]                        \n\t"
98            "ldc1   %[f_j_2],   -16(%[p_f])                     \n\t"
99            "sdc1   %[tmp],     8(%[p_f])                       \n\t"
100            PTR_ADDIU "%[p_f], -8                              \n\t"
101            "bgtz   %[j],       ff_lsp2polyf_lp_j%=             \n\t"
102            "ff_lsp2polyf_lp_j_end%=:                           \n\t"
103
104            : [f_j_2]"=&f"(f_j_2), [f_j_1]"=&f"(f_j_1), [val]"+f"(val),
105              [tmp]"=&f"(tmp), [f_j]"=&f"(f_j), [p_f]"+r"(p_f),
106              [j]"+r"(j), [p_fi]"+r"(p_fi)
107            : [i]"r"(i)
108            : "memory"
109        );
110        f[1] += val;
111    }
112}
113#define ff_lsp2polyf ff_lsp2polyf_mips
114#endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
115#endif /* HAVE_MIPSFPU && HAVE_INLINE_ASM */
116#endif /* AVCODEC_MIPS_LSP_MIPS_H */
117