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