| /* | |
| * Copyright (c) 2012 | |
| * MIPS Technologies, Inc., California. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * modification, are permitted provided that the following conditions | |
| * are met: | |
| * 1. Redistributions of source code must retain the above copyright | |
| * notice, this list of conditions and the following disclaimer. | |
| * 2. Redistributions in binary form must reproduce the above copyright | |
| * notice, this list of conditions and the following disclaimer in the | |
| * documentation and/or other materials provided with the distribution. | |
| * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its | |
| * contributors may be used to endorse or promote products derived from | |
| * this software without specific prior written permission. | |
| * | |
| * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND | |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE | |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| * SUCH DAMAGE. | |
| * | |
| * Author: Nedeljko Babic ([email protected]) | |
| * | |
| * LSP routines for ACELP-based codecs optimized for MIPS | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| /** | |
| * @file | |
| * Reference: libavcodec/lsp.c | |
| */ | |
| static av_always_inline void lsp2polyf_mips(const double *lsp, double *f, int lp_half_order) | |
| { | |
| int i, j = 0; | |
| double * p_fi = f; | |
| double * p_f = 0; | |
| f[0] = 1.0; | |
| f[1] = -2 * lsp[0]; | |
| lsp -= 2; | |
| for(i=2; i<=lp_half_order; i++) | |
| { | |
| double tmp, f_j_2, f_j_1, f_j; | |
| double val = lsp[2*i]; | |
| __asm__ volatile( | |
| "move %[p_f], %[p_fi] \n\t" | |
| "add.d %[val], %[val], %[val] \n\t" | |
| PTR_ADDIU "%[p_fi], 8 \n\t" | |
| "ldc1 %[f_j_1], 0(%[p_f]) \n\t" | |
| "ldc1 %[f_j], 8(%[p_f]) \n\t" | |
| "neg.d %[val], %[val] \n\t" | |
| "add.d %[tmp], %[f_j_1], %[f_j_1] \n\t" | |
| "madd.d %[tmp], %[tmp], %[f_j], %[val] \n\t" | |
| "addiu %[j], %[i], -2 \n\t" | |
| "ldc1 %[f_j_2], -8(%[p_f]) \n\t" | |
| "sdc1 %[tmp], 16(%[p_f]) \n\t" | |
| "beqz %[j], lsp2polyf_lp_j_end%= \n\t" | |
| "lsp2polyf_lp_j%=: \n\t" | |
| "add.d %[tmp], %[f_j], %[f_j_2] \n\t" | |
| "madd.d %[tmp], %[tmp], %[f_j_1], %[val] \n\t" | |
| "mov.d %[f_j], %[f_j_1] \n\t" | |
| "addiu %[j], -1 \n\t" | |
| "mov.d %[f_j_1], %[f_j_2] \n\t" | |
| "ldc1 %[f_j_2], -16(%[p_f]) \n\t" | |
| "sdc1 %[tmp], 8(%[p_f]) \n\t" | |
| PTR_ADDIU "%[p_f], -8 \n\t" | |
| "bgtz %[j], lsp2polyf_lp_j%= \n\t" | |
| "lsp2polyf_lp_j_end%=: \n\t" | |
| : [f_j_2]"=&f"(f_j_2), [f_j_1]"=&f"(f_j_1), [val]"+f"(val), | |
| [tmp]"=&f"(tmp), [f_j]"=&f"(f_j), [p_f]"+r"(p_f), | |
| [j]"+r"(j), [p_fi]"+r"(p_fi) | |
| : [i]"r"(i) | |
| : "memory" | |
| ); | |
| f[1] += val; | |
| } | |
| } | |