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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 (bojan@mips.com)
*
* 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
*/
#ifndef AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H
#define AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H
static void compute_antialias_mips_fixed(MPADecodeContext *s,
GranuleDef *g)
{
int32_t *ptr, *csa;
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)
);
ptr += 18;
}
}
#define compute_antialias compute_antialias_mips_fixed
#endif /* AVCODEC_MIPS_COMPUTE_ANTIALIAS_FIXED_H */
|
