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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 fixed-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_fixed(MPADecodeContext *s, | |
| GranuleDef *g) | |
| { | |
| const int32_t *csa; | |
| int32_t *ptr; | |
| int n, i; | |
| int MAX_lo = 0xffffffff; | |
| /* we antialias only "long" bands */ | |
| if (g->block_type == 2) { | |
| if (!g->switch_point) | |
| return; | |
| /* XXX: check this for 8000Hz case */ | |
| n = 1; | |
| } else { | |
| n = SBLIMIT - 1; | |
| } | |
| ptr = g->sb_hybrid + 18; | |
| for(i = n;i > 0;i--) { | |
| int tmp0, tmp1, tmp2, tmp00, tmp11; | |
| int temp_reg1, temp_reg2, temp_reg3, temp_reg4, temp_reg5, temp_reg6; | |
| csa = &csa_table[0][0]; | |
| /** | |
| * instructions are scheduled to minimize pipeline stall. | |
| */ | |
| __asm__ volatile ( | |
| "lw %[tmp0], -1*4(%[ptr]) \n\t" | |
| "lw %[tmp1], 0*4(%[ptr]) \n\t" | |
| "lw %[temp_reg1], 0*4(%[csa]) \n\t" | |
| "lw %[temp_reg2], 2*4(%[csa]) \n\t" | |
| "add %[tmp2], %[tmp0], %[tmp1] \n\t" | |
| "lw %[temp_reg3], 3*4(%[csa]) \n\t" | |
| "mult $ac0, %[tmp2], %[temp_reg1] \n\t" | |
| "mult $ac1, %[tmp2], %[temp_reg1] \n\t" | |
| "lw %[tmp00], -2*4(%[ptr]) \n\t" | |
| "lw %[tmp11], 1*4(%[ptr]) \n\t" | |
| "lw %[temp_reg4], 4*4(%[csa]) \n\t" | |
| "mtlo %[MAX_lo], $ac0 \n\t" | |
| "mtlo $zero, $ac1 \n\t" | |
| "msub $ac0, %[tmp1], %[temp_reg2] \n\t" | |
| "madd $ac1, %[tmp0], %[temp_reg3] \n\t" | |
| "add %[tmp2], %[tmp00], %[tmp11] \n\t" | |
| "lw %[temp_reg5], 6*4(%[csa]) \n\t" | |
| "mult $ac2, %[tmp2], %[temp_reg4] \n\t" | |
| "mult $ac3, %[tmp2], %[temp_reg4] \n\t" | |
| "mfhi %[temp_reg1], $ac0 \n\t" | |
| "mfhi %[temp_reg2], $ac1 \n\t" | |
| "lw %[temp_reg6], 7*4(%[csa]) \n\t" | |
| "mtlo %[MAX_lo], $ac2 \n\t" | |
| "msub $ac2, %[tmp11], %[temp_reg5] \n\t" | |
| "mtlo $zero, $ac3 \n\t" | |
| "madd $ac3, %[tmp00], %[temp_reg6] \n\t" | |
| "sll %[temp_reg1], %[temp_reg1], 2 \n\t" | |
| "sw %[temp_reg1], -1*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg4], $ac2 \n\t" | |
| "sll %[temp_reg2], %[temp_reg2], 2 \n\t" | |
| "mfhi %[temp_reg5], $ac3 \n\t" | |
| "sw %[temp_reg2], 0*4(%[ptr]) \n\t" | |
| "lw %[tmp0], -3*4(%[ptr]) \n\t" | |
| "lw %[tmp1], 2*4(%[ptr]) \n\t" | |
| "lw %[temp_reg1], 8*4(%[csa]) \n\t" | |
| "sll %[temp_reg4], %[temp_reg4], 2 \n\t" | |
| "add %[tmp2], %[tmp0], %[tmp1] \n\t" | |
| "sll %[temp_reg5], %[temp_reg5], 2 \n\t" | |
| "mult $ac0, %[tmp2], %[temp_reg1] \n\t" | |
| "mult $ac1, %[tmp2], %[temp_reg1] \n\t" | |
| "sw %[temp_reg4], -2*4(%[ptr]) \n\t" | |
| "sw %[temp_reg5], 1*4(%[ptr]) \n\t" | |
| "lw %[temp_reg2], 10*4(%[csa]) \n\t" | |
| "mtlo %[MAX_lo], $ac0 \n\t" | |
| "lw %[temp_reg3], 11*4(%[csa]) \n\t" | |
| "msub $ac0, %[tmp1], %[temp_reg2] \n\t" | |
| "mtlo $zero, $ac1 \n\t" | |
| "madd $ac1, %[tmp0], %[temp_reg3] \n\t" | |
| "lw %[tmp00], -4*4(%[ptr]) \n\t" | |
| "lw %[tmp11], 3*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg1], $ac0 \n\t" | |
| "lw %[temp_reg4], 12*4(%[csa]) \n\t" | |
| "mfhi %[temp_reg2], $ac1 \n\t" | |
| "add %[tmp2], %[tmp00], %[tmp11] \n\t" | |
| "mult $ac2, %[tmp2], %[temp_reg4] \n\t" | |
| "mult $ac3, %[tmp2], %[temp_reg4] \n\t" | |
| "lw %[temp_reg5], 14*4(%[csa]) \n\t" | |
| "lw %[temp_reg6], 15*4(%[csa]) \n\t" | |
| "sll %[temp_reg1], %[temp_reg1], 2 \n\t" | |
| "mtlo %[MAX_lo], $ac2 \n\t" | |
| "msub $ac2, %[tmp11], %[temp_reg5] \n\t" | |
| "mtlo $zero, $ac3 \n\t" | |
| "madd $ac3, %[tmp00], %[temp_reg6] \n\t" | |
| "sll %[temp_reg2], %[temp_reg2], 2 \n\t" | |
| "sw %[temp_reg1], -3*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg4], $ac2 \n\t" | |
| "sw %[temp_reg2], 2*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg5], $ac3 \n\t" | |
| "lw %[tmp0], -5*4(%[ptr]) \n\t" | |
| "lw %[tmp1], 4*4(%[ptr]) \n\t" | |
| "lw %[temp_reg1], 16*4(%[csa]) \n\t" | |
| "lw %[temp_reg2], 18*4(%[csa]) \n\t" | |
| "add %[tmp2], %[tmp0], %[tmp1] \n\t" | |
| "lw %[temp_reg3], 19*4(%[csa]) \n\t" | |
| "mult $ac0, %[tmp2], %[temp_reg1] \n\t" | |
| "mult $ac1, %[tmp2], %[temp_reg1] \n\t" | |
| "sll %[temp_reg4], %[temp_reg4], 2 \n\t" | |
| "sll %[temp_reg5], %[temp_reg5], 2 \n\t" | |
| "sw %[temp_reg4], -4*4(%[ptr]) \n\t" | |
| "mtlo %[MAX_lo], $ac0 \n\t" | |
| "msub $ac0, %[tmp1], %[temp_reg2] \n\t" | |
| "mtlo $zero, $ac1 \n\t" | |
| "madd $ac1, %[tmp0], %[temp_reg3] \n\t" | |
| "sw %[temp_reg5], 3*4(%[ptr]) \n\t" | |
| "lw %[tmp00], -6*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg1], $ac0 \n\t" | |
| "lw %[tmp11], 5*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg2], $ac1 \n\t" | |
| "lw %[temp_reg4], 20*4(%[csa]) \n\t" | |
| "add %[tmp2], %[tmp00], %[tmp11] \n\t" | |
| "lw %[temp_reg5], 22*4(%[csa]) \n\t" | |
| "mult $ac2, %[tmp2], %[temp_reg4] \n\t" | |
| "mult $ac3, %[tmp2], %[temp_reg4] \n\t" | |
| "lw %[temp_reg6], 23*4(%[csa]) \n\t" | |
| "sll %[temp_reg1], %[temp_reg1], 2 \n\t" | |
| "sll %[temp_reg2], %[temp_reg2], 2 \n\t" | |
| "mtlo %[MAX_lo], $ac2 \n\t" | |
| "msub $ac2, %[tmp11], %[temp_reg5] \n\t" | |
| "mtlo $zero, $ac3 \n\t" | |
| "madd $ac3, %[tmp00], %[temp_reg6] \n\t" | |
| "sw %[temp_reg1], -5*4(%[ptr]) \n\t" | |
| "sw %[temp_reg2], 4*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg4], $ac2 \n\t" | |
| "lw %[tmp0], -7*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg5], $ac3 \n\t" | |
| "lw %[tmp1], 6*4(%[ptr]) \n\t" | |
| "lw %[temp_reg1], 24*4(%[csa]) \n\t" | |
| "lw %[temp_reg2], 26*4(%[csa]) \n\t" | |
| "add %[tmp2], %[tmp0], %[tmp1] \n\t" | |
| "lw %[temp_reg3], 27*4(%[csa]) \n\t" | |
| "mult $ac0, %[tmp2], %[temp_reg1] \n\t" | |
| "mult $ac1, %[tmp2], %[temp_reg1] \n\t" | |
| "sll %[temp_reg4], %[temp_reg4], 2 \n\t" | |
| "sll %[temp_reg5], %[temp_reg5], 2 \n\t" | |
| "sw %[temp_reg4], -6*4(%[ptr]) \n\t" | |
| "mtlo %[MAX_lo], $ac0 \n\t" | |
| "msub $ac0, %[tmp1], %[temp_reg2] \n\t" | |
| "mtlo $zero, $ac1 \n\t" | |
| "madd $ac1, %[tmp0], %[temp_reg3] \n\t" | |
| "sw %[temp_reg5], 5*4(%[ptr]) \n\t" | |
| "lw %[tmp00], -8*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg1], $ac0 \n\t" | |
| "lw %[tmp11], 7*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg2], $ac1 \n\t" | |
| "lw %[temp_reg4], 28*4(%[csa]) \n\t" | |
| "add %[tmp2], %[tmp00], %[tmp11] \n\t" | |
| "lw %[temp_reg5], 30*4(%[csa]) \n\t" | |
| "mult $ac2, %[tmp2], %[temp_reg4] \n\t" | |
| "mult $ac3, %[tmp2], %[temp_reg4] \n\t" | |
| "lw %[temp_reg6], 31*4(%[csa]) \n\t" | |
| "sll %[temp_reg1], %[temp_reg1], 2 \n\t" | |
| "sll %[temp_reg2], %[temp_reg2], 2 \n\t" | |
| "mtlo %[MAX_lo], $ac2 \n\t" | |
| "msub $ac2, %[tmp11], %[temp_reg5] \n\t" | |
| "mtlo $zero, $ac3 \n\t" | |
| "madd $ac3, %[tmp00], %[temp_reg6] \n\t" | |
| "sw %[temp_reg1], -7*4(%[ptr]) \n\t" | |
| "sw %[temp_reg2], 6*4(%[ptr]) \n\t" | |
| "mfhi %[temp_reg4], $ac2 \n\t" | |
| "mfhi %[temp_reg5], $ac3 \n\t" | |
| "sll %[temp_reg4], %[temp_reg4], 2 \n\t" | |
| "sll %[temp_reg5], %[temp_reg5], 2 \n\t" | |
| "sw %[temp_reg4], -8*4(%[ptr]) \n\t" | |
| "sw %[temp_reg5], 7*4(%[ptr]) \n\t" | |
| : [tmp0] "=&r" (tmp0), [tmp1] "=&r" (tmp1), [tmp2] "=&r" (tmp2), | |
| [tmp00] "=&r" (tmp00), [tmp11] "=&r" (tmp11), | |
| [temp_reg1] "=&r" (temp_reg1), [temp_reg2] "=&r" (temp_reg2), | |
| [temp_reg3] "=&r" (temp_reg3), [temp_reg4] "=&r" (temp_reg4), | |
| [temp_reg5] "=&r" (temp_reg5), [temp_reg6] "=&r" (temp_reg6) | |
| : [csa] "r" (csa), [ptr] "r" (ptr), | |
| [MAX_lo] "r" (MAX_lo) | |
| : "memory", "hi", "lo", "$ac1hi", "$ac1lo", "$ac2hi", "$ac2lo", | |
| "$ac3hi", "$ac3lo" | |
| ); | |
| ptr += 18; | |
| } | |
| } | |