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lsp_mips.h
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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_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 
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 */
const char const char void * val
Definition: avisynth_c.h:634
MIPS assembly defines from sys/asm.h but rewritten for use with C inline assembly (rather than from w...
#define PTR_ADDIU
Definition: asmdefs.h:41
#define av_always_inline
Definition: attributes.h:39