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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_LSP_MIPS_H | |
55 | #define AVCODEC_LSP_MIPS_H | |
56 | ||
57 | #if HAVE_MIPSFPU && HAVE_INLINE_ASM | |
58 | static av_always_inline void ff_lsp2polyf_mips(const double *lsp, double *f, int lp_half_order) | |
59 | { | |
60 | int i, j = 0; | |
61 | double * p_fi = f; | |
62 | double * p_f = 0; | |
63 | ||
64 | f[0] = 1.0; | |
65 | f[1] = -2 * lsp[0]; | |
66 | lsp -= 2; | |
67 | ||
68 | for(i=2; i<=lp_half_order; i++) | |
69 | { | |
70 | double tmp, f_j_2, f_j_1, f_j; | |
71 | double val = lsp[2*i]; | |
72 | ||
73 | __asm__ volatile( | |
74 | "move %[p_f], %[p_fi] \n\t" | |
75 | "add.d %[val], %[val], %[val] \n\t" | |
76 | "addiu %[p_fi], 8 \n\t" | |
77 | "ldc1 %[f_j_1], 0(%[p_f]) \n\t" | |
78 | "ldc1 %[f_j], 8(%[p_f]) \n\t" | |
79 | "neg.d %[val], %[val] \n\t" | |
80 | "add.d %[tmp], %[f_j_1], %[f_j_1] \n\t" | |
81 | "madd.d %[tmp], %[tmp], %[f_j], %[val] \n\t" | |
82 | "addiu %[j], %[i], -2 \n\t" | |
83 | "ldc1 %[f_j_2], -8(%[p_f]) \n\t" | |
84 | "sdc1 %[tmp], 16(%[p_f]) \n\t" | |
85 | "beqz %[j], ff_lsp2polyf_lp_j_end%= \n\t" | |
86 | "ff_lsp2polyf_lp_j%=: \n\t" | |
87 | "add.d %[tmp], %[f_j], %[f_j_2] \n\t" | |
88 | "madd.d %[tmp], %[tmp], %[f_j_1], %[val] \n\t" | |
89 | "mov.d %[f_j], %[f_j_1] \n\t" | |
90 | "addiu %[j], -1 \n\t" | |
91 | "mov.d %[f_j_1], %[f_j_2] \n\t" | |
92 | "ldc1 %[f_j_2], -16(%[p_f]) \n\t" | |
93 | "sdc1 %[tmp], 8(%[p_f]) \n\t" | |
94 | "addiu %[p_f], -8 \n\t" | |
95 | "bgtz %[j], ff_lsp2polyf_lp_j%= \n\t" | |
96 | "ff_lsp2polyf_lp_j_end%=: \n\t" | |
97 | ||
98 | : [f_j_2]"=&f"(f_j_2), [f_j_1]"=&f"(f_j_1), [val]"+f"(val), | |
99 | [tmp]"=&f"(tmp), [f_j]"=&f"(f_j), [p_f]"+r"(p_f), | |
100 | [j]"+r"(j), [p_fi]"+r"(p_fi) | |
101 | : [i]"r"(i) | |
102 | : "memory" | |
103 | ); | |
104 | f[1] += val; | |
105 | } | |
106 | } | |
107 | #define ff_lsp2polyf ff_lsp2polyf_mips | |
108 | #endif /* HAVE_MIPSFPU && HAVE_INLINE_ASM */ | |
109 | #endif /* AVCODEC_LSP_MIPS_H */ |