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| /* | |
| * 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: Bojan Zivkovic ([email protected]) | |
| * | |
| * Compute antialias function optimised for MIPS floating-point architecture | |
| * | |
| * 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/mpegaudiodec.c | |
| */ | |
| static void compute_antialias_mips_float(MPADecodeContext *s, | |
| GranuleDef *g) | |
| { | |
| float *ptr, *ptr_end; | |
| const float *csa = &csa_table[0][0]; | |
| /* temporary variables */ | |
| float in1, in2, in3, in4, in5, in6, in7, in8; | |
| float out1, out2, out3, out4; | |
| ptr = g->sb_hybrid + 18; | |
| /* we antialias only "long" bands */ | |
| if (g->block_type == 2) { | |
| if (!g->switch_point) | |
| return; | |
| /* XXX: check this for 8000Hz case */ | |
| ptr_end = ptr + 18; | |
| } else { | |
| ptr_end = ptr + 558; | |
| } | |
| /** | |
| * instructions are scheduled to minimize pipeline stall. | |
| */ | |
| __asm__ volatile ( | |
| "compute_antialias_float_loop%=: \t\n" | |
| "lwc1 %[in1], -1*4(%[ptr]) \t\n" | |
| "lwc1 %[in2], 0(%[csa]) \t\n" | |
| "lwc1 %[in3], 1*4(%[csa]) \t\n" | |
| "lwc1 %[in4], 0(%[ptr]) \t\n" | |
| "lwc1 %[in5], -2*4(%[ptr]) \t\n" | |
| "lwc1 %[in6], 4*4(%[csa]) \t\n" | |
| "mul.s %[out1], %[in1], %[in2] \t\n" | |
| "mul.s %[out2], %[in1], %[in3] \t\n" | |
| "lwc1 %[in7], 5*4(%[csa]) \t\n" | |
| "lwc1 %[in8], 1*4(%[ptr]) \t\n" | |
| "nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n" | |
| "madd.s %[out2], %[out2], %[in2], %[in4] \t\n" | |
| "mul.s %[out3], %[in5], %[in6] \t\n" | |
| "mul.s %[out4], %[in5], %[in7] \t\n" | |
| "lwc1 %[in1], -3*4(%[ptr]) \t\n" | |
| "swc1 %[out1], -1*4(%[ptr]) \t\n" | |
| "swc1 %[out2], 0(%[ptr]) \t\n" | |
| "nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n" | |
| "madd.s %[out4], %[out4], %[in6], %[in8] \t\n" | |
| "lwc1 %[in2], 8*4(%[csa]) \t\n" | |
| "swc1 %[out3], -2*4(%[ptr]) \t\n" | |
| "swc1 %[out4], 1*4(%[ptr]) \t\n" | |
| "lwc1 %[in3], 9*4(%[csa]) \t\n" | |
| "lwc1 %[in4], 2*4(%[ptr]) \t\n" | |
| "mul.s %[out1], %[in1], %[in2] \t\n" | |
| "lwc1 %[in5], -4*4(%[ptr]) \t\n" | |
| "lwc1 %[in6], 12*4(%[csa]) \t\n" | |
| "mul.s %[out2], %[in1], %[in3] \t\n" | |
| "lwc1 %[in7], 13*4(%[csa]) \t\n" | |
| "nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n" | |
| "lwc1 %[in8], 3*4(%[ptr]) \t\n" | |
| "mul.s %[out3], %[in5], %[in6] \t\n" | |
| "madd.s %[out2], %[out2], %[in2], %[in4] \t\n" | |
| "mul.s %[out4], %[in5], %[in7] \t\n" | |
| "swc1 %[out1], -3*4(%[ptr]) \t\n" | |
| "lwc1 %[in1], -5*4(%[ptr]) \t\n" | |
| "nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n" | |
| "swc1 %[out2], 2*4(%[ptr]) \t\n" | |
| "madd.s %[out4], %[out4], %[in6], %[in8] \t\n" | |
| "lwc1 %[in2], 16*4(%[csa]) \t\n" | |
| "lwc1 %[in3], 17*4(%[csa]) \t\n" | |
| "swc1 %[out3], -4*4(%[ptr]) \t\n" | |
| "lwc1 %[in4], 4*4(%[ptr]) \t\n" | |
| "swc1 %[out4], 3*4(%[ptr]) \t\n" | |
| "mul.s %[out1], %[in1], %[in2] \t\n" | |
| "mul.s %[out2], %[in1], %[in3] \t\n" | |
| "lwc1 %[in5], -6*4(%[ptr]) \t\n" | |
| "lwc1 %[in6], 20*4(%[csa]) \t\n" | |
| "lwc1 %[in7], 21*4(%[csa]) \t\n" | |
| "nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n" | |
| "madd.s %[out2], %[out2], %[in2], %[in4] \t\n" | |
| "lwc1 %[in8], 5*4(%[ptr]) \t\n" | |
| "mul.s %[out3], %[in5], %[in6] \t\n" | |
| "mul.s %[out4], %[in5], %[in7] \t\n" | |
| "swc1 %[out1], -5*4(%[ptr]) \t\n" | |
| "swc1 %[out2], 4*4(%[ptr]) \t\n" | |
| "lwc1 %[in1], -7*4(%[ptr]) \t\n" | |
| "nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n" | |
| "madd.s %[out4], %[out4], %[in6], %[in8] \t\n" | |
| "lwc1 %[in2], 24*4(%[csa]) \t\n" | |
| "lwc1 %[in3], 25*4(%[csa]) \t\n" | |
| "lwc1 %[in4], 6*4(%[ptr]) \t\n" | |
| "swc1 %[out3], -6*4(%[ptr]) \t\n" | |
| "swc1 %[out4], 5*4(%[ptr]) \t\n" | |
| "mul.s %[out1], %[in1], %[in2] \t\n" | |
| "lwc1 %[in5], -8*4(%[ptr]) \t\n" | |
| "mul.s %[out2], %[in1], %[in3] \t\n" | |
| "lwc1 %[in6], 28*4(%[csa]) \t\n" | |
| "lwc1 %[in7], 29*4(%[csa]) \t\n" | |
| "nmsub.s %[out1], %[out1], %[in3], %[in4] \t\n" | |
| "lwc1 %[in8], 7*4(%[ptr]) \t\n" | |
| "madd.s %[out2], %[out2], %[in2], %[in4] \t\n" | |
| "mul.s %[out3], %[in5], %[in6] \t\n" | |
| "mul.s %[out4], %[in5], %[in7] \t\n" | |
| "swc1 %[out1], -7*4(%[ptr]) \t\n" | |
| "swc1 %[out2], 6*4(%[ptr]) \t\n" | |
| PTR_ADDIU "%[ptr],%[ptr], 72 \t\n" | |
| "nmsub.s %[out3], %[out3], %[in7], %[in8] \t\n" | |
| "madd.s %[out4], %[out4], %[in6], %[in8] \t\n" | |
| "swc1 %[out3], -26*4(%[ptr]) \t\n" | |
| "swc1 %[out4], -11*4(%[ptr]) \t\n" | |
| "bne %[ptr], %[ptr_end], compute_antialias_float_loop%= \t\n" | |
| : [ptr] "+r" (ptr), | |
| [in1] "=&f" (in1), [in2] "=&f" (in2), | |
| [in3] "=&f" (in3), [in4] "=&f" (in4), | |
| [in5] "=&f" (in5), [in6] "=&f" (in6), | |
| [in7] "=&f" (in7), [in8] "=&f" (in8), | |
| [out1] "=&f" (out1), [out2] "=&f" (out2), | |
| [out3] "=&f" (out3), [out4] "=&f" (out4) | |
| : [csa] "r" (csa), [ptr_end] "r" (ptr_end) | |
| : "memory" | |
| ); | |
| } | |