| /* |
| * 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 (bojan@mips.com) |
| * |
| * 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 |
| */ |
| |
| #ifndef AVCODEC_MIPS_COMPUTE_ANTIALIAS_FLOAT_H |
| #define AVCODEC_MIPS_COMPUTE_ANTIALIAS_FLOAT_H |
| |
| #include "libavutil/mips/asmdefs.h" |
| |
| #if HAVE_INLINE_ASM |
| static void compute_antialias_mips_float(MPADecodeContext *s, |
| GranuleDef *g) |
| { |
| float *ptr, *ptr_end; |
| 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" |
| ); |
| } |
| #define compute_antialias compute_antialias_mips_float |
| #endif /* HAVE_INLINE_ASM */ |
| |
| #endif /* AVCODEC_MIPS_COMPUTE_ANTIALIAS_FLOAT_H */ |
