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 #if HAVE_MIPSFPU && HAVE_INLINE_ASM
58 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
59 #include "libavutil/mips/asmdefs.h"
60
ff_lsp2polyf_mips(const double * lsp,double * f,int lp_half_order)61 static av_always_inline void ff_lsp2polyf_mips(const double *lsp, double *f, int lp_half_order)
62 {
63 int i, j = 0;
64 double * p_fi = f;
65 double * p_f = 0;
66
67 f[0] = 1.0;
68 f[1] = -2 * lsp[0];
69 lsp -= 2;
70
71 for(i=2; i<=lp_half_order; i++)
72 {
73 double tmp, f_j_2, f_j_1, f_j;
74 double val = lsp[2*i];
75
76 __asm__ volatile(
77 "move %[p_f], %[p_fi] \n\t"
78 "add.d %[val], %[val], %[val] \n\t"
79 PTR_ADDIU "%[p_fi], 8 \n\t"
80 "ldc1 %[f_j_1], 0(%[p_f]) \n\t"
81 "ldc1 %[f_j], 8(%[p_f]) \n\t"
82 "neg.d %[val], %[val] \n\t"
83 "add.d %[tmp], %[f_j_1], %[f_j_1] \n\t"
84 "madd.d %[tmp], %[tmp], %[f_j], %[val] \n\t"
85 "addiu %[j], %[i], -2 \n\t"
86 "ldc1 %[f_j_2], -8(%[p_f]) \n\t"
87 "sdc1 %[tmp], 16(%[p_f]) \n\t"
88 "beqz %[j], ff_lsp2polyf_lp_j_end%= \n\t"
89 "ff_lsp2polyf_lp_j%=: \n\t"
90 "add.d %[tmp], %[f_j], %[f_j_2] \n\t"
91 "madd.d %[tmp], %[tmp], %[f_j_1], %[val] \n\t"
92 "mov.d %[f_j], %[f_j_1] \n\t"
93 "addiu %[j], -1 \n\t"
94 "mov.d %[f_j_1], %[f_j_2] \n\t"
95 "ldc1 %[f_j_2], -16(%[p_f]) \n\t"
96 "sdc1 %[tmp], 8(%[p_f]) \n\t"
97 PTR_ADDIU "%[p_f], -8 \n\t"
98 "bgtz %[j], ff_lsp2polyf_lp_j%= \n\t"
99 "ff_lsp2polyf_lp_j_end%=: \n\t"
100
101 : [f_j_2]"=&f"(f_j_2), [f_j_1]"=&f"(f_j_1), [val]"+f"(val),
102 [tmp]"=&f"(tmp), [f_j]"=&f"(f_j), [p_f]"+r"(p_f),
103 [j]"+r"(j), [p_fi]"+r"(p_fi)
104 : [i]"r"(i)
105 : "memory"
106 );
107 f[1] += val;
108 }
109 }
110 #define ff_lsp2polyf ff_lsp2polyf_mips
111 #endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
112 #endif /* HAVE_MIPSFPU && HAVE_INLINE_ASM */
113 #endif /* AVCODEC_MIPS_LSP_MIPS_H */
114