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: Bojan Zivkovic (bojan@mips.com)
30 *
31 * Compute antialias function optimised for MIPS floating-point architecture
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/mpegaudiodec.c
53 */
54
55 #ifndef AVCODEC_MIPS_COMPUTE_ANTIALIAS_FLOAT_H
56 #define AVCODEC_MIPS_COMPUTE_ANTIALIAS_FLOAT_H
57
58 #include "libavutil/mips/asmdefs.h"
59
60 #if HAVE_INLINE_ASM
61 #if !HAVE_MIPS32R6 && !HAVE_MIPS64R6
compute_antialias_mips_float(MPADecodeContext * s,GranuleDef * g)62 static void compute_antialias_mips_float(MPADecodeContext *s,
63 GranuleDef *g)
64 {
65 float *ptr, *ptr_end;
66 const float *csa = &csa_table[0][0];
67 /* temporary variables */
68 float in1, in2, in3, in4, in5, in6, in7, in8;
69 float out1, out2, out3, out4;
70
71 ptr = g->sb_hybrid + 18;
72 /* we antialias only "long" bands */
73 if (g->block_type == 2) {
74 if (!g->switch_point)
75 return;
76 /* XXX: check this for 8000Hz case */
77 ptr_end = ptr + 18;
78 } else {
79 ptr_end = ptr + 558;
80 }
81
82 /**
83 * instructions are scheduled to minimize pipeline stall.
84 */
85
86 __asm__ volatile (
87 "compute_antialias_float_loop%=: \t\n"
88 "lwc1 %[in1], -1*4(%[ptr]) \t\n"
89 "lwc1 %[in2], 0(%[csa]) \t\n"
90 "lwc1 %[in3], 1*4(%[csa]) \t\n"
91 "lwc1 %[in4], 0(%[ptr]) \t\n"
92 "lwc1 %[in5], -2*4(%[ptr]) \t\n"
93 "lwc1 %[in6], 4*4(%[csa]) \t\n"
94 "mul.s %[out1], %[in1], %[in2] \t\n"
95 "mul.s %[out2], %[in1], %[in3] \t\n"
96 "lwc1 %[in7], 5*4(%[csa]) \t\n"
97 "lwc1 %[in8], 1*4(%[ptr]) \t\n"
98 "nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n"
99 "madd.s %[out2], %[out2], %[in2], %[in4] \t\n"
100 "mul.s %[out3], %[in5], %[in6] \t\n"
101 "mul.s %[out4], %[in5], %[in7] \t\n"
102 "lwc1 %[in1], -3*4(%[ptr]) \t\n"
103 "swc1 %[out1], -1*4(%[ptr]) \t\n"
104 "swc1 %[out2], 0(%[ptr]) \t\n"
105 "nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n"
106 "madd.s %[out4], %[out4], %[in6], %[in8] \t\n"
107 "lwc1 %[in2], 8*4(%[csa]) \t\n"
108 "swc1 %[out3], -2*4(%[ptr]) \t\n"
109 "swc1 %[out4], 1*4(%[ptr]) \t\n"
110 "lwc1 %[in3], 9*4(%[csa]) \t\n"
111 "lwc1 %[in4], 2*4(%[ptr]) \t\n"
112 "mul.s %[out1], %[in1], %[in2] \t\n"
113 "lwc1 %[in5], -4*4(%[ptr]) \t\n"
114 "lwc1 %[in6], 12*4(%[csa]) \t\n"
115 "mul.s %[out2], %[in1], %[in3] \t\n"
116 "lwc1 %[in7], 13*4(%[csa]) \t\n"
117 "nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n"
118 "lwc1 %[in8], 3*4(%[ptr]) \t\n"
119 "mul.s %[out3], %[in5], %[in6] \t\n"
120 "madd.s %[out2], %[out2], %[in2], %[in4] \t\n"
121 "mul.s %[out4], %[in5], %[in7] \t\n"
122 "swc1 %[out1], -3*4(%[ptr]) \t\n"
123 "lwc1 %[in1], -5*4(%[ptr]) \t\n"
124 "nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n"
125 "swc1 %[out2], 2*4(%[ptr]) \t\n"
126 "madd.s %[out4], %[out4], %[in6], %[in8] \t\n"
127 "lwc1 %[in2], 16*4(%[csa]) \t\n"
128 "lwc1 %[in3], 17*4(%[csa]) \t\n"
129 "swc1 %[out3], -4*4(%[ptr]) \t\n"
130 "lwc1 %[in4], 4*4(%[ptr]) \t\n"
131 "swc1 %[out4], 3*4(%[ptr]) \t\n"
132 "mul.s %[out1], %[in1], %[in2] \t\n"
133 "mul.s %[out2], %[in1], %[in3] \t\n"
134 "lwc1 %[in5], -6*4(%[ptr]) \t\n"
135 "lwc1 %[in6], 20*4(%[csa]) \t\n"
136 "lwc1 %[in7], 21*4(%[csa]) \t\n"
137 "nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n"
138 "madd.s %[out2], %[out2], %[in2], %[in4] \t\n"
139 "lwc1 %[in8], 5*4(%[ptr]) \t\n"
140 "mul.s %[out3], %[in5], %[in6] \t\n"
141 "mul.s %[out4], %[in5], %[in7] \t\n"
142 "swc1 %[out1], -5*4(%[ptr]) \t\n"
143 "swc1 %[out2], 4*4(%[ptr]) \t\n"
144 "lwc1 %[in1], -7*4(%[ptr]) \t\n"
145 "nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n"
146 "madd.s %[out4], %[out4], %[in6], %[in8] \t\n"
147 "lwc1 %[in2], 24*4(%[csa]) \t\n"
148 "lwc1 %[in3], 25*4(%[csa]) \t\n"
149 "lwc1 %[in4], 6*4(%[ptr]) \t\n"
150 "swc1 %[out3], -6*4(%[ptr]) \t\n"
151 "swc1 %[out4], 5*4(%[ptr]) \t\n"
152 "mul.s %[out1], %[in1], %[in2] \t\n"
153 "lwc1 %[in5], -8*4(%[ptr]) \t\n"
154 "mul.s %[out2], %[in1], %[in3] \t\n"
155 "lwc1 %[in6], 28*4(%[csa]) \t\n"
156 "lwc1 %[in7], 29*4(%[csa]) \t\n"
157 "nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n"
158 "lwc1 %[in8], 7*4(%[ptr]) \t\n"
159 "madd.s %[out2], %[out2], %[in2], %[in4] \t\n"
160 "mul.s %[out3], %[in5], %[in6] \t\n"
161 "mul.s %[out4], %[in5], %[in7] \t\n"
162 "swc1 %[out1], -7*4(%[ptr]) \t\n"
163 "swc1 %[out2], 6*4(%[ptr]) \t\n"
164 PTR_ADDIU "%[ptr],%[ptr], 72 \t\n"
165 "nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n"
166 "madd.s %[out4], %[out4], %[in6], %[in8] \t\n"
167 "swc1 %[out3], -26*4(%[ptr]) \t\n"
168 "swc1 %[out4], -11*4(%[ptr]) \t\n"
169 "bne %[ptr], %[ptr_end], compute_antialias_float_loop%= \t\n"
170
171 : [ptr] "+r" (ptr),
172 [in1] "=&f" (in1), [in2] "=&f" (in2),
173 [in3] "=&f" (in3), [in4] "=&f" (in4),
174 [in5] "=&f" (in5), [in6] "=&f" (in6),
175 [in7] "=&f" (in7), [in8] "=&f" (in8),
176 [out1] "=&f" (out1), [out2] "=&f" (out2),
177 [out3] "=&f" (out3), [out4] "=&f" (out4)
178 : [csa] "r" (csa), [ptr_end] "r" (ptr_end)
179 : "memory"
180 );
181 }
182 #define compute_antialias compute_antialias_mips_float
183 #endif /* !HAVE_MIPS32R6 && !HAVE_MIPS64R6 */
184 #endif /* HAVE_INLINE_ASM */
185
186 #endif /* AVCODEC_MIPS_COMPUTE_ANTIALIAS_FLOAT_H */
187