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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6147 | serge | 1 | /* |
| 2 | * Copyright (c) 2012 |
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| 3 | * MIPS Technologies, Inc., California. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its |
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| 14 | * contributors may be used to endorse or promote products derived from |
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| 15 | * this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND |
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| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE |
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| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 27 | * SUCH DAMAGE. |
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| 28 | * |
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| 29 | * Author: Stanislav Ocovaj (socovaj@mips.com) |
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| 30 | * Author: Zoran Lukic (zoranl@mips.com) |
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| 31 | * |
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| 32 | * Optimized MDCT/IMDCT and FFT transforms |
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| 33 | * |
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| 34 | * This file is part of FFmpeg. |
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| 35 | * |
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| 36 | * FFmpeg is free software; you can redistribute it and/or |
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| 37 | * modify it under the terms of the GNU Lesser General Public |
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| 38 | * License as published by the Free Software Foundation; either |
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| 39 | * version 2.1 of the License, or (at your option) any later version. |
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| 40 | * |
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| 41 | * FFmpeg is distributed in the hope that it will be useful, |
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| 42 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 43 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 44 | * Lesser General Public License for more details. |
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| 45 | * |
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| 46 | * You should have received a copy of the GNU Lesser General Public |
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| 47 | * License along with FFmpeg; if not, write to the Free Software |
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| 48 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 49 | */ |
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| 50 | #include "config.h" |
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| 51 | #include "libavcodec/fft.h" |
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| 52 | #include "libavcodec/fft_table.h" |
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| 53 | #include "libavutil/mips/asmdefs.h" |
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| 54 | |||
| 55 | /** |
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| 56 | * FFT transform |
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| 57 | */ |
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| 58 | |||
| 59 | #if HAVE_INLINE_ASM |
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| 60 | static void ff_fft_calc_mips(FFTContext *s, FFTComplex *z) |
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| 61 | { |
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| 62 | int nbits, i, n, num_transforms, offset, step; |
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| 63 | int n4, n2, n34; |
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| 64 | FFTSample tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, tmp8; |
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| 65 | FFTComplex *tmpz; |
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| 66 | float w_re, w_im; |
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| 67 | float *w_re_ptr, *w_im_ptr; |
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| 68 | const int fft_size = (1 << s->nbits); |
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| 69 | float pom, pom1, pom2, pom3; |
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| 70 | float temp, temp1, temp3, temp4; |
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| 71 | FFTComplex * tmpz_n2, * tmpz_n34, * tmpz_n4; |
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| 72 | FFTComplex * tmpz_n2_i, * tmpz_n34_i, * tmpz_n4_i, * tmpz_i; |
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| 73 | |||
| 74 | num_transforms = (0x2aab >> (16 - s->nbits)) | 1; |
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| 75 | |||
| 76 | for (n=0; n |
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| 77 | offset = ff_fft_offsets_lut[n] << 2; |
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| 78 | tmpz = z + offset; |
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| 79 | |||
| 80 | tmp1 = tmpz[0].re + tmpz[1].re; |
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| 81 | tmp5 = tmpz[2].re + tmpz[3].re; |
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| 82 | tmp2 = tmpz[0].im + tmpz[1].im; |
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| 83 | tmp6 = tmpz[2].im + tmpz[3].im; |
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| 84 | tmp3 = tmpz[0].re - tmpz[1].re; |
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| 85 | tmp8 = tmpz[2].im - tmpz[3].im; |
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| 86 | tmp4 = tmpz[0].im - tmpz[1].im; |
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| 87 | tmp7 = tmpz[2].re - tmpz[3].re; |
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| 88 | |||
| 89 | tmpz[0].re = tmp1 + tmp5; |
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| 90 | tmpz[2].re = tmp1 - tmp5; |
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| 91 | tmpz[0].im = tmp2 + tmp6; |
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| 92 | tmpz[2].im = tmp2 - tmp6; |
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| 93 | tmpz[1].re = tmp3 + tmp8; |
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| 94 | tmpz[3].re = tmp3 - tmp8; |
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| 95 | tmpz[1].im = tmp4 - tmp7; |
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| 96 | tmpz[3].im = tmp4 + tmp7; |
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| 97 | |||
| 98 | } |
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| 99 | |||
| 100 | if (fft_size < 8) |
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| 101 | return; |
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| 102 | |||
| 103 | num_transforms = (num_transforms >> 1) | 1; |
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| 104 | |||
| 105 | for (n=0; n |
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| 106 | offset = ff_fft_offsets_lut[n] << 3; |
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| 107 | tmpz = z + offset; |
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| 108 | |||
| 109 | __asm__ volatile ( |
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| 110 | "lwc1 %[tmp1], 32(%[tmpz]) \n\t" |
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| 111 | "lwc1 %[pom], 40(%[tmpz]) \n\t" |
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| 112 | "lwc1 %[tmp3], 48(%[tmpz]) \n\t" |
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| 113 | "lwc1 %[pom1], 56(%[tmpz]) \n\t" |
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| 114 | "lwc1 %[tmp2], 36(%[tmpz]) \n\t" |
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| 115 | "lwc1 %[pom2], 44(%[tmpz]) \n\t" |
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| 116 | "lwc1 %[pom3], 60(%[tmpz]) \n\t" |
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| 117 | "lwc1 %[tmp4], 52(%[tmpz]) \n\t" |
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| 118 | "add.s %[tmp1], %[tmp1], %[pom] \n\t" // tmp1 = tmpz[4].re + tmpz[5].re; |
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| 119 | "add.s %[tmp3], %[tmp3], %[pom1] \n\t" // tmp3 = tmpz[6].re + tmpz[7].re; |
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| 120 | "add.s %[tmp2], %[tmp2], %[pom2] \n\t" // tmp2 = tmpz[4].im + tmpz[5].im; |
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| 121 | "lwc1 %[pom], 40(%[tmpz]) \n\t" |
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| 122 | "add.s %[tmp4], %[tmp4], %[pom3] \n\t" // tmp4 = tmpz[6].im + tmpz[7].im; |
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| 123 | "add.s %[tmp5], %[tmp1], %[tmp3] \n\t" // tmp5 = tmp1 + tmp3; |
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| 124 | "sub.s %[tmp7], %[tmp1], %[tmp3] \n\t" // tmp7 = tmp1 - tmp3; |
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| 125 | "lwc1 %[tmp1], 32(%[tmpz]) \n\t" |
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| 126 | "lwc1 %[pom1], 44(%[tmpz]) \n\t" |
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| 127 | "add.s %[tmp6], %[tmp2], %[tmp4] \n\t" // tmp6 = tmp2 + tmp4; |
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| 128 | "sub.s %[tmp8], %[tmp2], %[tmp4] \n\t" // tmp8 = tmp2 - tmp4; |
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| 129 | "lwc1 %[tmp2], 36(%[tmpz]) \n\t" |
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| 130 | "lwc1 %[pom2], 56(%[tmpz]) \n\t" |
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| 131 | "lwc1 %[pom3], 60(%[tmpz]) \n\t" |
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| 132 | "lwc1 %[tmp3], 48(%[tmpz]) \n\t" |
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| 133 | "lwc1 %[tmp4], 52(%[tmpz]) \n\t" |
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| 134 | "sub.s %[tmp1], %[tmp1], %[pom] \n\t" // tmp1 = tmpz[4].re - tmpz[5].re; |
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| 135 | "lwc1 %[pom], 0(%[tmpz]) \n\t" |
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| 136 | "sub.s %[tmp2], %[tmp2], %[pom1] \n\t" // tmp2 = tmpz[4].im - tmpz[5].im; |
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| 137 | "sub.s %[tmp3], %[tmp3], %[pom2] \n\t" // tmp3 = tmpz[6].re - tmpz[7].re; |
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| 138 | "lwc1 %[pom2], 4(%[tmpz]) \n\t" |
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| 139 | "sub.s %[pom1], %[pom], %[tmp5] \n\t" |
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| 140 | "sub.s %[tmp4], %[tmp4], %[pom3] \n\t" // tmp4 = tmpz[6].im - tmpz[7].im; |
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| 141 | "add.s %[pom3], %[pom], %[tmp5] \n\t" |
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| 142 | "sub.s %[pom], %[pom2], %[tmp6] \n\t" |
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| 143 | "add.s %[pom2], %[pom2], %[tmp6] \n\t" |
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| 144 | "swc1 %[pom1], 32(%[tmpz]) \n\t" // tmpz[4].re = tmpz[0].re - tmp5; |
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| 145 | "swc1 %[pom3], 0(%[tmpz]) \n\t" // tmpz[0].re = tmpz[0].re + tmp5; |
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| 146 | "swc1 %[pom], 36(%[tmpz]) \n\t" // tmpz[4].im = tmpz[0].im - tmp6; |
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| 147 | "swc1 %[pom2], 4(%[tmpz]) \n\t" // tmpz[0].im = tmpz[0].im + tmp6; |
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| 148 | "lwc1 %[pom1], 16(%[tmpz]) \n\t" |
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| 149 | "lwc1 %[pom3], 20(%[tmpz]) \n\t" |
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| 150 | "li.s %[pom], 0.7071067812 \n\t" // float pom = 0.7071067812f; |
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| 151 | "add.s %[temp1],%[tmp1], %[tmp2] \n\t" |
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| 152 | "sub.s %[temp], %[pom1], %[tmp8] \n\t" |
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| 153 | "add.s %[pom2], %[pom3], %[tmp7] \n\t" |
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| 154 | "sub.s %[temp3],%[tmp3], %[tmp4] \n\t" |
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| 155 | "sub.s %[temp4],%[tmp2], %[tmp1] \n\t" |
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| 156 | "swc1 %[temp], 48(%[tmpz]) \n\t" // tmpz[6].re = tmpz[2].re - tmp8; |
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| 157 | "swc1 %[pom2], 52(%[tmpz]) \n\t" // tmpz[6].im = tmpz[2].im + tmp7; |
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| 158 | "add.s %[pom1], %[pom1], %[tmp8] \n\t" |
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| 159 | "sub.s %[pom3], %[pom3], %[tmp7] \n\t" |
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| 160 | "add.s %[tmp3], %[tmp3], %[tmp4] \n\t" |
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| 161 | "mul.s %[tmp5], %[pom], %[temp1] \n\t" // tmp5 = pom * (tmp1 + tmp2); |
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| 162 | "mul.s %[tmp7], %[pom], %[temp3] \n\t" // tmp7 = pom * (tmp3 - tmp4); |
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| 163 | "mul.s %[tmp6], %[pom], %[temp4] \n\t" // tmp6 = pom * (tmp2 - tmp1); |
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| 164 | "mul.s %[tmp8], %[pom], %[tmp3] \n\t" // tmp8 = pom * (tmp3 + tmp4); |
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| 165 | "swc1 %[pom1], 16(%[tmpz]) \n\t" // tmpz[2].re = tmpz[2].re + tmp8; |
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| 166 | "swc1 %[pom3], 20(%[tmpz]) \n\t" // tmpz[2].im = tmpz[2].im - tmp7; |
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| 167 | "add.s %[tmp1], %[tmp5], %[tmp7] \n\t" // tmp1 = tmp5 + tmp7; |
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| 168 | "sub.s %[tmp3], %[tmp5], %[tmp7] \n\t" // tmp3 = tmp5 - tmp7; |
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| 169 | "add.s %[tmp2], %[tmp6], %[tmp8] \n\t" // tmp2 = tmp6 + tmp8; |
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| 170 | "sub.s %[tmp4], %[tmp6], %[tmp8] \n\t" // tmp4 = tmp6 - tmp8; |
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| 171 | "lwc1 %[temp], 8(%[tmpz]) \n\t" |
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| 172 | "lwc1 %[temp1],12(%[tmpz]) \n\t" |
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| 173 | "lwc1 %[pom], 24(%[tmpz]) \n\t" |
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| 174 | "lwc1 %[pom2], 28(%[tmpz]) \n\t" |
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| 175 | "sub.s %[temp4],%[temp], %[tmp1] \n\t" |
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| 176 | "sub.s %[temp3],%[temp1], %[tmp2] \n\t" |
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| 177 | "add.s %[temp], %[temp], %[tmp1] \n\t" |
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| 178 | "add.s %[temp1],%[temp1], %[tmp2] \n\t" |
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| 179 | "sub.s %[pom1], %[pom], %[tmp4] \n\t" |
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| 180 | "add.s %[pom3], %[pom2], %[tmp3] \n\t" |
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| 181 | "add.s %[pom], %[pom], %[tmp4] \n\t" |
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| 182 | "sub.s %[pom2], %[pom2], %[tmp3] \n\t" |
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| 183 | "swc1 %[temp4],40(%[tmpz]) \n\t" // tmpz[5].re = tmpz[1].re - tmp1; |
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| 184 | "swc1 %[temp3],44(%[tmpz]) \n\t" // tmpz[5].im = tmpz[1].im - tmp2; |
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| 185 | "swc1 %[temp], 8(%[tmpz]) \n\t" // tmpz[1].re = tmpz[1].re + tmp1; |
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| 186 | "swc1 %[temp1],12(%[tmpz]) \n\t" // tmpz[1].im = tmpz[1].im + tmp2; |
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| 187 | "swc1 %[pom1], 56(%[tmpz]) \n\t" // tmpz[7].re = tmpz[3].re - tmp4; |
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| 188 | "swc1 %[pom3], 60(%[tmpz]) \n\t" // tmpz[7].im = tmpz[3].im + tmp3; |
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| 189 | "swc1 %[pom], 24(%[tmpz]) \n\t" // tmpz[3].re = tmpz[3].re + tmp4; |
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| 190 | "swc1 %[pom2], 28(%[tmpz]) \n\t" // tmpz[3].im = tmpz[3].im - tmp3; |
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| 191 | : [tmp1]"=&f"(tmp1), [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2), |
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| 192 | [tmp3]"=&f"(tmp3), [tmp2]"=&f"(tmp2), [tmp4]"=&f"(tmp4), [tmp5]"=&f"(tmp5), [tmp7]"=&f"(tmp7), |
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| 193 | [tmp6]"=&f"(tmp6), [tmp8]"=&f"(tmp8), [pom3]"=&f"(pom3),[temp]"=&f"(temp), [temp1]"=&f"(temp1), |
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| 194 | [temp3]"=&f"(temp3), [temp4]"=&f"(temp4) |
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| 195 | : [tmpz]"r"(tmpz) |
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| 196 | : "memory" |
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| 197 | ); |
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| 198 | } |
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| 199 | |||
| 200 | step = 1 << (MAX_LOG2_NFFT - 4); |
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| 201 | n4 = 4; |
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| 202 | |||
| 203 | for (nbits=4; nbits<=s->nbits; nbits++) { |
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| 204 | num_transforms = (num_transforms >> 1) | 1; |
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| 205 | n2 = 2 * n4; |
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| 206 | n34 = 3 * n4; |
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| 207 | |||
| 208 | for (n=0; n |
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| 209 | offset = ff_fft_offsets_lut[n] << nbits; |
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| 210 | tmpz = z + offset; |
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| 211 | |||
| 212 | tmpz_n2 = tmpz + n2; |
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| 213 | tmpz_n4 = tmpz + n4; |
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| 214 | tmpz_n34 = tmpz + n34; |
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| 215 | |||
| 216 | __asm__ volatile ( |
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| 217 | "lwc1 %[pom1], 0(%[tmpz_n2]) \n\t" |
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| 218 | "lwc1 %[pom], 0(%[tmpz_n34]) \n\t" |
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| 219 | "lwc1 %[pom2], 4(%[tmpz_n2]) \n\t" |
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| 220 | "lwc1 %[pom3], 4(%[tmpz_n34]) \n\t" |
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| 221 | "lwc1 %[temp1],0(%[tmpz]) \n\t" |
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| 222 | "lwc1 %[temp3],4(%[tmpz]) \n\t" |
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| 223 | "add.s %[tmp5], %[pom1], %[pom] \n\t" // tmp5 = tmpz[ n2].re + tmpz[n34].re; |
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| 224 | "sub.s %[tmp1], %[pom1], %[pom] \n\t" // tmp1 = tmpz[ n2].re - tmpz[n34].re; |
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| 225 | "add.s %[tmp6], %[pom2], %[pom3] \n\t" // tmp6 = tmpz[ n2].im + tmpz[n34].im; |
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| 226 | "sub.s %[tmp2], %[pom2], %[pom3] \n\t" // tmp2 = tmpz[ n2].im - tmpz[n34].im; |
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| 227 | "sub.s %[temp], %[temp1], %[tmp5] \n\t" |
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| 228 | "add.s %[temp1],%[temp1], %[tmp5] \n\t" |
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| 229 | "sub.s %[temp4],%[temp3], %[tmp6] \n\t" |
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| 230 | "add.s %[temp3],%[temp3], %[tmp6] \n\t" |
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| 231 | "swc1 %[temp], 0(%[tmpz_n2]) \n\t" // tmpz[ n2].re = tmpz[ 0].re - tmp5; |
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| 232 | "swc1 %[temp1],0(%[tmpz]) \n\t" // tmpz[ 0].re = tmpz[ 0].re + tmp5; |
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| 233 | "lwc1 %[pom1], 0(%[tmpz_n4]) \n\t" |
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| 234 | "swc1 %[temp4],4(%[tmpz_n2]) \n\t" // tmpz[ n2].im = tmpz[ 0].im - tmp6; |
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| 235 | "lwc1 %[temp], 4(%[tmpz_n4]) \n\t" |
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| 236 | "swc1 %[temp3],4(%[tmpz]) \n\t" // tmpz[ 0].im = tmpz[ 0].im + tmp6; |
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| 237 | "sub.s %[pom], %[pom1], %[tmp2] \n\t" |
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| 238 | "add.s %[pom1], %[pom1], %[tmp2] \n\t" |
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| 239 | "add.s %[temp1],%[temp], %[tmp1] \n\t" |
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| 240 | "sub.s %[temp], %[temp], %[tmp1] \n\t" |
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| 241 | "swc1 %[pom], 0(%[tmpz_n34]) \n\t" // tmpz[n34].re = tmpz[n4].re - tmp2; |
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| 242 | "swc1 %[pom1], 0(%[tmpz_n4]) \n\t" // tmpz[ n4].re = tmpz[n4].re + tmp2; |
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| 243 | "swc1 %[temp1],4(%[tmpz_n34]) \n\t" // tmpz[n34].im = tmpz[n4].im + tmp1; |
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| 244 | "swc1 %[temp], 4(%[tmpz_n4]) \n\t" // tmpz[ n4].im = tmpz[n4].im - tmp1; |
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| 245 | : [tmp5]"=&f"(tmp5), |
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| 246 | [tmp1]"=&f"(tmp1), [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2), |
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| 247 | [tmp2]"=&f"(tmp2), [tmp6]"=&f"(tmp6), [pom3]"=&f"(pom3), |
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| 248 | [temp]"=&f"(temp), [temp1]"=&f"(temp1), [temp3]"=&f"(temp3), [temp4]"=&f"(temp4) |
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| 249 | : [tmpz]"r"(tmpz), [tmpz_n2]"r"(tmpz_n2), [tmpz_n34]"r"(tmpz_n34), [tmpz_n4]"r"(tmpz_n4) |
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| 250 | : "memory" |
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| 251 | ); |
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| 252 | |||
| 253 | w_re_ptr = (float*)(ff_cos_65536 + step); |
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| 254 | w_im_ptr = (float*)(ff_cos_65536 + MAX_FFT_SIZE/4 - step); |
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| 255 | |||
| 256 | for (i=1; i |
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| 257 | w_re = w_re_ptr[0]; |
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| 258 | w_im = w_im_ptr[0]; |
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| 259 | tmpz_n2_i = tmpz_n2 + i; |
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| 260 | tmpz_n4_i = tmpz_n4 + i; |
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| 261 | tmpz_n34_i= tmpz_n34 + i; |
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| 262 | tmpz_i = tmpz + i; |
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| 263 | |||
| 264 | __asm__ volatile ( |
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| 265 | "lwc1 %[temp], 0(%[tmpz_n2_i]) \n\t" |
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| 266 | "lwc1 %[temp1], 4(%[tmpz_n2_i]) \n\t" |
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| 267 | "lwc1 %[pom], 0(%[tmpz_n34_i]) \n\t" |
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| 268 | "lwc1 %[pom1], 4(%[tmpz_n34_i]) \n\t" |
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| 269 | "mul.s %[temp3], %[w_im], %[temp] \n\t" |
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| 270 | "mul.s %[temp4], %[w_im], %[temp1] \n\t" |
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| 271 | "mul.s %[pom2], %[w_im], %[pom1] \n\t" |
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| 272 | "mul.s %[pom3], %[w_im], %[pom] \n\t" |
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| 273 | "msub.s %[tmp2], %[temp3], %[w_re], %[temp1] \n\t" // tmp2 = w_re * tmpz[ n2+i].im - w_im * tmpz[ n2+i].re; |
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| 274 | "madd.s %[tmp1], %[temp4], %[w_re], %[temp] \n\t" // tmp1 = w_re * tmpz[ n2+i].re + w_im * tmpz[ n2+i].im; |
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| 275 | "msub.s %[tmp3], %[pom2], %[w_re], %[pom] \n\t" // tmp3 = w_re * tmpz[n34+i].re - w_im * tmpz[n34+i].im; |
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| 276 | "madd.s %[tmp4], %[pom3], %[w_re], %[pom1] \n\t" // tmp4 = w_re * tmpz[n34+i].im + w_im * tmpz[n34+i].re; |
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| 277 | "lwc1 %[temp], 0(%[tmpz_i]) \n\t" |
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| 278 | "lwc1 %[pom], 4(%[tmpz_i]) \n\t" |
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| 279 | "add.s %[tmp5], %[tmp1], %[tmp3] \n\t" // tmp5 = tmp1 + tmp3; |
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| 280 | "sub.s %[tmp1], %[tmp1], %[tmp3] \n\t" // tmp1 = tmp1 - tmp3; |
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| 281 | "add.s %[tmp6], %[tmp2], %[tmp4] \n\t" // tmp6 = tmp2 + tmp4; |
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| 282 | "sub.s %[tmp2], %[tmp2], %[tmp4] \n\t" // tmp2 = tmp2 - tmp4; |
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| 283 | "sub.s %[temp1], %[temp], %[tmp5] \n\t" |
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| 284 | "add.s %[temp], %[temp], %[tmp5] \n\t" |
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| 285 | "sub.s %[pom1], %[pom], %[tmp6] \n\t" |
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| 286 | "add.s %[pom], %[pom], %[tmp6] \n\t" |
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| 287 | "lwc1 %[temp3], 0(%[tmpz_n4_i]) \n\t" |
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| 288 | "lwc1 %[pom2], 4(%[tmpz_n4_i]) \n\t" |
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| 289 | "swc1 %[temp1], 0(%[tmpz_n2_i]) \n\t" // tmpz[ n2+i].re = tmpz[ i].re - tmp5; |
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| 290 | "swc1 %[temp], 0(%[tmpz_i]) \n\t" // tmpz[ i].re = tmpz[ i].re + tmp5; |
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| 291 | "swc1 %[pom1], 4(%[tmpz_n2_i]) \n\t" // tmpz[ n2+i].im = tmpz[ i].im - tmp6; |
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| 292 | "swc1 %[pom] , 4(%[tmpz_i]) \n\t" // tmpz[ i].im = tmpz[ i].im + tmp6; |
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| 293 | "sub.s %[temp4], %[temp3], %[tmp2] \n\t" |
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| 294 | "add.s %[pom3], %[pom2], %[tmp1] \n\t" |
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| 295 | "add.s %[temp3], %[temp3], %[tmp2] \n\t" |
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| 296 | "sub.s %[pom2], %[pom2], %[tmp1] \n\t" |
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| 297 | "swc1 %[temp4], 0(%[tmpz_n34_i]) \n\t" // tmpz[n34+i].re = tmpz[n4+i].re - tmp2; |
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| 298 | "swc1 %[pom3], 4(%[tmpz_n34_i]) \n\t" // tmpz[n34+i].im = tmpz[n4+i].im + tmp1; |
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| 299 | "swc1 %[temp3], 0(%[tmpz_n4_i]) \n\t" // tmpz[ n4+i].re = tmpz[n4+i].re + tmp2; |
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| 300 | "swc1 %[pom2], 4(%[tmpz_n4_i]) \n\t" // tmpz[ n4+i].im = tmpz[n4+i].im - tmp1; |
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| 301 | : [tmp1]"=&f"(tmp1), [tmp2]"=&f" (tmp2), [temp]"=&f"(temp), [tmp3]"=&f"(tmp3), |
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| 302 | [tmp4]"=&f"(tmp4), [tmp5]"=&f"(tmp5), [tmp6]"=&f"(tmp6), |
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| 303 | [temp1]"=&f"(temp1), [temp3]"=&f"(temp3), [temp4]"=&f"(temp4), |
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| 304 | [pom]"=&f"(pom), [pom1]"=&f"(pom1), [pom2]"=&f"(pom2), [pom3]"=&f"(pom3) |
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| 305 | : [w_re]"f"(w_re), [w_im]"f"(w_im), |
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| 306 | [tmpz_i]"r"(tmpz_i),[tmpz_n2_i]"r"(tmpz_n2_i), |
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| 307 | [tmpz_n34_i]"r"(tmpz_n34_i), [tmpz_n4_i]"r"(tmpz_n4_i) |
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| 308 | : "memory" |
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| 309 | ); |
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| 310 | w_re_ptr += step; |
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| 311 | w_im_ptr -= step; |
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| 312 | } |
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| 313 | } |
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| 314 | step >>= 1; |
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| 315 | n4 <<= 1; |
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| 316 | } |
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| 317 | } |
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| 318 | |||
| 319 | /** |
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| 320 | * MDCT/IMDCT transforms. |
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| 321 | */ |
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| 322 | |||
| 323 | static void ff_imdct_half_mips(FFTContext *s, FFTSample *output, const FFTSample *input) |
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| 324 | { |
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| 325 | int k, n8, n4, n2, n, j; |
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| 326 | const uint16_t *revtab = s->revtab; |
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| 327 | const FFTSample *tcos = s->tcos; |
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| 328 | const FFTSample *tsin = s->tsin; |
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| 329 | const FFTSample *in1, *in2, *in3, *in4; |
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| 330 | FFTComplex *z = (FFTComplex *)output; |
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| 331 | |||
| 332 | int j1; |
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| 333 | const float *tcos1, *tsin1, *tcos2, *tsin2; |
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| 334 | float temp1, temp2, temp3, temp4, temp5, temp6, temp7, temp8, |
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| 335 | temp9, temp10, temp11, temp12, temp13, temp14, temp15, temp16; |
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| 336 | FFTComplex *z1, *z2; |
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| 337 | |||
| 338 | n = 1 << s->mdct_bits; |
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| 339 | n2 = n >> 1; |
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| 340 | n4 = n >> 2; |
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| 341 | n8 = n >> 3; |
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| 342 | |||
| 343 | /* pre rotation */ |
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| 344 | in1 = input; |
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| 345 | in2 = input + n2 - 1; |
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| 346 | in3 = input + 2; |
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| 347 | in4 = input + n2 - 3; |
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| 348 | |||
| 349 | tcos1 = tcos; |
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| 350 | tsin1 = tsin; |
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| 351 | |||
| 352 | /* n4 = 64 or 128 */ |
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| 353 | for(k = 0; k < n4; k += 2) { |
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| 354 | j = revtab[k ]; |
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| 355 | j1 = revtab[k + 1]; |
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| 356 | |||
| 357 | __asm__ volatile ( |
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| 358 | "lwc1 %[temp1], 0(%[in2]) \t\n" |
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| 359 | "lwc1 %[temp2], 0(%[tcos1]) \t\n" |
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| 360 | "lwc1 %[temp3], 0(%[tsin1]) \t\n" |
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| 361 | "lwc1 %[temp4], 0(%[in1]) \t\n" |
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| 362 | "lwc1 %[temp5], 0(%[in4]) \t\n" |
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| 363 | "mul.s %[temp9], %[temp1], %[temp2] \t\n" |
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| 364 | "mul.s %[temp10], %[temp1], %[temp3] \t\n" |
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| 365 | "lwc1 %[temp6], 4(%[tcos1]) \t\n" |
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| 366 | "lwc1 %[temp7], 4(%[tsin1]) \t\n" |
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| 367 | "nmsub.s %[temp9], %[temp9], %[temp4], %[temp3] \t\n" |
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| 368 | "madd.s %[temp10], %[temp10], %[temp4], %[temp2] \t\n" |
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| 369 | "mul.s %[temp11], %[temp5], %[temp6] \t\n" |
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| 370 | "mul.s %[temp12], %[temp5], %[temp7] \t\n" |
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| 371 | "lwc1 %[temp8], 0(%[in3]) \t\n" |
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| 372 | PTR_ADDIU " %[tcos1], %[tcos1], 8 \t\n" |
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| 373 | PTR_ADDIU " %[tsin1], %[tsin1], 8 \t\n" |
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| 374 | PTR_ADDIU " %[in1], %[in1], 16 \t\n" |
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| 375 | "nmsub.s %[temp11], %[temp11], %[temp8], %[temp7] \t\n" |
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| 376 | "madd.s %[temp12], %[temp12], %[temp8], %[temp6] \t\n" |
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| 377 | PTR_ADDIU " %[in2], %[in2], -16 \t\n" |
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| 378 | PTR_ADDIU " %[in3], %[in3], 16 \t\n" |
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| 379 | PTR_ADDIU " %[in4], %[in4], -16 \t\n" |
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| 380 | |||
| 381 | : [temp1]"=&f"(temp1), [temp2]"=&f"(temp2), |
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| 382 | [temp3]"=&f"(temp3), [temp4]"=&f"(temp4), |
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| 383 | [temp5]"=&f"(temp5), [temp6]"=&f"(temp6), |
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| 384 | [temp7]"=&f"(temp7), [temp8]"=&f"(temp8), |
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| 385 | [temp9]"=&f"(temp9), [temp10]"=&f"(temp10), |
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| 386 | [temp11]"=&f"(temp11), [temp12]"=&f"(temp12), |
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| 387 | [tsin1]"+r"(tsin1), [tcos1]"+r"(tcos1), |
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| 388 | [in1]"+r"(in1), [in2]"+r"(in2), |
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| 389 | [in3]"+r"(in3), [in4]"+r"(in4) |
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| 390 | : |
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| 391 | : "memory" |
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| 392 | ); |
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| 393 | |||
| 394 | z[j ].re = temp9; |
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| 395 | z[j ].im = temp10; |
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| 396 | z[j1].re = temp11; |
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| 397 | z[j1].im = temp12; |
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| 398 | } |
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| 399 | |||
| 400 | s->fft_calc(s, z); |
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| 401 | |||
| 402 | /* post rotation + reordering */ |
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| 403 | /* n8 = 32 or 64 */ |
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| 404 | for(k = 0; k < n8; k += 2) { |
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| 405 | tcos1 = &tcos[n8 - k - 2]; |
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| 406 | tsin1 = &tsin[n8 - k - 2]; |
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| 407 | tcos2 = &tcos[n8 + k]; |
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| 408 | tsin2 = &tsin[n8 + k]; |
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| 409 | z1 = &z[n8 - k - 2]; |
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| 410 | z2 = &z[n8 + k ]; |
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| 411 | |||
| 412 | __asm__ volatile ( |
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| 413 | "lwc1 %[temp1], 12(%[z1]) \t\n" |
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| 414 | "lwc1 %[temp2], 4(%[tsin1]) \t\n" |
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| 415 | "lwc1 %[temp3], 4(%[tcos1]) \t\n" |
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| 416 | "lwc1 %[temp4], 8(%[z1]) \t\n" |
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| 417 | "lwc1 %[temp5], 4(%[z1]) \t\n" |
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| 418 | "mul.s %[temp9], %[temp1], %[temp2] \t\n" |
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| 419 | "mul.s %[temp10], %[temp1], %[temp3] \t\n" |
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| 420 | "lwc1 %[temp6], 0(%[tsin1]) \t\n" |
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| 421 | "lwc1 %[temp7], 0(%[tcos1]) \t\n" |
||
| 422 | "nmsub.s %[temp9], %[temp9], %[temp4], %[temp3] \t\n" |
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| 423 | "madd.s %[temp10], %[temp10], %[temp4], %[temp2] \t\n" |
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| 424 | "mul.s %[temp11], %[temp5], %[temp6] \t\n" |
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| 425 | "mul.s %[temp12], %[temp5], %[temp7] \t\n" |
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| 426 | "lwc1 %[temp8], 0(%[z1]) \t\n" |
||
| 427 | "lwc1 %[temp1], 4(%[z2]) \t\n" |
||
| 428 | "lwc1 %[temp2], 0(%[tsin2]) \t\n" |
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| 429 | "lwc1 %[temp3], 0(%[tcos2]) \t\n" |
||
| 430 | "nmsub.s %[temp11], %[temp11], %[temp8], %[temp7] \t\n" |
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| 431 | "madd.s %[temp12], %[temp12], %[temp8], %[temp6] \t\n" |
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| 432 | "mul.s %[temp13], %[temp1], %[temp2] \t\n" |
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| 433 | "mul.s %[temp14], %[temp1], %[temp3] \t\n" |
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| 434 | "lwc1 %[temp4], 0(%[z2]) \t\n" |
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| 435 | "lwc1 %[temp5], 12(%[z2]) \t\n" |
||
| 436 | "lwc1 %[temp6], 4(%[tsin2]) \t\n" |
||
| 437 | "lwc1 %[temp7], 4(%[tcos2]) \t\n" |
||
| 438 | "nmsub.s %[temp13], %[temp13], %[temp4], %[temp3] \t\n" |
||
| 439 | "madd.s %[temp14], %[temp14], %[temp4], %[temp2] \t\n" |
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| 440 | "mul.s %[temp15], %[temp5], %[temp6] \t\n" |
||
| 441 | "mul.s %[temp16], %[temp5], %[temp7] \t\n" |
||
| 442 | "lwc1 %[temp8], 8(%[z2]) \t\n" |
||
| 443 | "nmsub.s %[temp15], %[temp15], %[temp8], %[temp7] \t\n" |
||
| 444 | "madd.s %[temp16], %[temp16], %[temp8], %[temp6] \t\n" |
||
| 445 | : [temp1]"=&f"(temp1), [temp2]"=&f"(temp2), |
||
| 446 | [temp3]"=&f"(temp3), [temp4]"=&f"(temp4), |
||
| 447 | [temp5]"=&f"(temp5), [temp6]"=&f"(temp6), |
||
| 448 | [temp7]"=&f"(temp7), [temp8]"=&f"(temp8), |
||
| 449 | [temp9]"=&f"(temp9), [temp10]"=&f"(temp10), |
||
| 450 | [temp11]"=&f"(temp11), [temp12]"=&f"(temp12), |
||
| 451 | [temp13]"=&f"(temp13), [temp14]"=&f"(temp14), |
||
| 452 | [temp15]"=&f"(temp15), [temp16]"=&f"(temp16) |
||
| 453 | : [z1]"r"(z1), [z2]"r"(z2), |
||
| 454 | [tsin1]"r"(tsin1), [tcos1]"r"(tcos1), |
||
| 455 | [tsin2]"r"(tsin2), [tcos2]"r"(tcos2) |
||
| 456 | : "memory" |
||
| 457 | ); |
||
| 458 | |||
| 459 | z1[1].re = temp9; |
||
| 460 | z1[1].im = temp14; |
||
| 461 | z2[0].re = temp13; |
||
| 462 | z2[0].im = temp10; |
||
| 463 | |||
| 464 | z1[0].re = temp11; |
||
| 465 | z1[0].im = temp16; |
||
| 466 | z2[1].re = temp15; |
||
| 467 | z2[1].im = temp12; |
||
| 468 | } |
||
| 469 | } |
||
| 470 | |||
| 471 | /** |
||
| 472 | * Compute inverse MDCT of size N = 2^nbits |
||
| 473 | * @param output N samples |
||
| 474 | * @param input N/2 samples |
||
| 475 | */ |
||
| 476 | static void ff_imdct_calc_mips(FFTContext *s, FFTSample *output, const FFTSample *input) |
||
| 477 | { |
||
| 478 | int k; |
||
| 479 | int n = 1 << s->mdct_bits; |
||
| 480 | int n2 = n >> 1; |
||
| 481 | int n4 = n >> 2; |
||
| 482 | |||
| 483 | ff_imdct_half_mips(s, output+n4, input); |
||
| 484 | |||
| 485 | for(k = 0; k < n4; k+=4) { |
||
| 486 | output[k] = -output[n2-k-1]; |
||
| 487 | output[k+1] = -output[n2-k-2]; |
||
| 488 | output[k+2] = -output[n2-k-3]; |
||
| 489 | output[k+3] = -output[n2-k-4]; |
||
| 490 | |||
| 491 | output[n-k-1] = output[n2+k]; |
||
| 492 | output[n-k-2] = output[n2+k+1]; |
||
| 493 | output[n-k-3] = output[n2+k+2]; |
||
| 494 | output[n-k-4] = output[n2+k+3]; |
||
| 495 | } |
||
| 496 | } |
||
| 497 | #endif /* HAVE_INLINE_ASM */ |
||
| 498 | |||
| 499 | av_cold void ff_fft_init_mips(FFTContext *s) |
||
| 500 | { |
||
| 501 | int n=0; |
||
| 502 | |||
| 503 | ff_fft_lut_init(ff_fft_offsets_lut, 0, 1 << 16, &n); |
||
| 504 | ff_init_ff_cos_tabs(16); |
||
| 505 | |||
| 506 | #if HAVE_INLINE_ASM |
||
| 507 | s->fft_calc = ff_fft_calc_mips; |
||
| 508 | #if CONFIG_MDCT |
||
| 509 | s->imdct_calc = ff_imdct_calc_mips; |
||
| 510 | s->imdct_half = ff_imdct_half_mips; |
||
| 511 | #endif |
||
| 512 | #endif |
||
| 513 | } |