ref: 1e6af9e2b664db5202766986c30430468e5d58db
dir: /vpx_dsp/mips/itrans8_dspr2.c/
/*
* Copyright (c) 2015 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "./vpx_config.h"
#include "./vpx_dsp_rtcd.h"
#include "vpx_dsp/mips/inv_txfm_dspr2.h"
#include "vpx_dsp/txfm_common.h"
#if HAVE_DSPR2
void idct8_rows_dspr2(const int16_t *input, int16_t *output, uint32_t no_rows) {
int step1_0, step1_1, step1_2, step1_3, step1_4, step1_5, step1_6, step1_7;
const int const_2_power_13 = 8192;
int Temp0, Temp1, Temp2, Temp3, Temp4;
int i;
for (i = no_rows; i--; ) {
__asm__ __volatile__ (
/*
temp_1 = (input[0] + input[4]) * cospi_16_64;
step2_0 = dct_const_round_shift(temp_1);
temp_2 = (input[0] - input[4]) * cospi_16_64;
step2_1 = dct_const_round_shift(temp_2);
*/
"lh %[Temp0], 0(%[input]) \n\t"
"lh %[Temp1], 8(%[input]) \n\t"
"mtlo %[const_2_power_13], $ac0 \n\t"
"mthi $zero, $ac0 \n\t"
"mtlo %[const_2_power_13], $ac1 \n\t"
"mthi $zero, $ac1 \n\t"
"add %[Temp2], %[Temp0], %[Temp1] \n\t"
"madd $ac0, %[Temp2], %[cospi_16_64] \n\t"
"extp %[Temp4], $ac0, 31 \n\t"
"sub %[Temp3], %[Temp0], %[Temp1] \n\t"
"madd $ac1, %[Temp3], %[cospi_16_64] \n\t"
"mtlo %[const_2_power_13], $ac0 \n\t"
"mthi $zero, $ac0 \n\t"
"extp %[Temp2], $ac1, 31 \n\t"
/*
temp_1 = input[2] * cospi_24_64 - input[6] * cospi_8_64;
step2_2 = dct_const_round_shift(temp_1);
*/
"lh %[Temp0], 4(%[input]) \n\t"
"lh %[Temp1], 12(%[input]) \n\t"
"madd $ac0, %[Temp0], %[cospi_24_64] \n\t"
"msub $ac0, %[Temp1], %[cospi_8_64] \n\t"
"mtlo %[const_2_power_13], $ac1 \n\t"
"mthi $zero, $ac1 \n\t"
"extp %[Temp3], $ac0, 31 \n\t"
/*
step1_1 = step2_1 + step2_2;
step1_2 = step2_1 - step2_2;
*/
"add %[step1_1], %[Temp2], %[Temp3] \n\t"
"sub %[step1_2], %[Temp2], %[Temp3] \n\t"
/*
temp_2 = input[2] * cospi_8_64 + input[6] * cospi_24_64;
step2_3 = dct_const_round_shift(temp_2);
*/
"madd $ac1, %[Temp0], %[cospi_8_64] \n\t"
"madd $ac1, %[Temp1], %[cospi_24_64] \n\t"
"extp %[Temp1], $ac1, 31 \n\t"
"mtlo %[const_2_power_13], $ac0 \n\t"
"mthi $zero, $ac0 \n\t"
/*
step1_0 = step2_0 + step2_3;
step1_3 = step2_0 - step2_3;
*/
"add %[step1_0], %[Temp4], %[Temp1] \n\t"
"sub %[step1_3], %[Temp4], %[Temp1] \n\t"
/*
temp_1 = input[1] * cospi_28_64 - input[7] * cospi_4_64;
step1_4 = dct_const_round_shift(temp_1);
*/
"lh %[Temp0], 2(%[input]) \n\t"
"madd $ac0, %[Temp0], %[cospi_28_64] \n\t"
"mtlo %[const_2_power_13], $ac1 \n\t"
"mthi $zero, $ac1 \n\t"
"lh %[Temp1], 14(%[input]) \n\t"
"lh %[Temp0], 2(%[input]) \n\t"
"msub $ac0, %[Temp1], %[cospi_4_64] \n\t"
"extp %[step1_4], $ac0, 31 \n\t"
/*
temp_2 = input[1] * cospi_4_64 + input[7] * cospi_28_64;
step1_7 = dct_const_round_shift(temp_2);
*/
"madd $ac1, %[Temp0], %[cospi_4_64] \n\t"
"madd $ac1, %[Temp1], %[cospi_28_64] \n\t"
"extp %[step1_7], $ac1, 31 \n\t"
/*
temp_1 = input[5] * cospi_12_64 - input[3] * cospi_20_64;
step1_5 = dct_const_round_shift(temp_1);
*/
"mtlo %[const_2_power_13], $ac0 \n\t"
"mthi $zero, $ac0 \n\t"
"lh %[Temp0], 10(%[input]) \n\t"
"madd $ac0, %[Temp0], %[cospi_12_64] \n\t"
"lh %[Temp1], 6(%[input]) \n\t"
"msub $ac0, %[Temp1], %[cospi_20_64] \n\t"
"extp %[step1_5], $ac0, 31 \n\t"
/*
temp_2 = input[5] * cospi_20_64 + input[3] * cospi_12_64;
step1_6 = dct_const_round_shift(temp_2);
*/
"mtlo %[const_2_power_13], $ac1 \n\t"
"mthi $zero, $ac1 \n\t"
"lh %[Temp0], 10(%[input]) \n\t"
"madd $ac1, %[Temp0], %[cospi_20_64] \n\t"
"lh %[Temp1], 6(%[input]) \n\t"
"madd $ac1, %[Temp1], %[cospi_12_64] \n\t"
"extp %[step1_6], $ac1, 31 \n\t"
/*
temp_1 = (step1_7 - step1_6 - step1_4 + step1_5) * cospi_16_64;
temp_2 = (step1_4 - step1_5 - step1_6 + step1_7) * cospi_16_64;
*/
"sub %[Temp0], %[step1_7], %[step1_6] \n\t"
"sub %[Temp0], %[Temp0], %[step1_4] \n\t"
"add %[Temp0], %[Temp0], %[step1_5] \n\t"
"sub %[Temp1], %[step1_4], %[step1_5] \n\t"
"sub %[Temp1], %[Temp1], %[step1_6] \n\t"
"add %[Temp1], %[Temp1], %[step1_7] \n\t"
"mtlo %[const_2_power_13], $ac0 \n\t"
"mthi $zero, $ac0 \n\t"
"mtlo %[const_2_power_13], $ac1 \n\t"
"mthi $zero, $ac1 \n\t"
"madd $ac0, %[Temp0], %[cospi_16_64] \n\t"
"madd $ac1, %[Temp1], %[cospi_16_64] \n\t"
/*
step1_4 = step1_4 + step1_5;
step1_7 = step1_6 + step1_7;
*/
"add %[step1_4], %[step1_4], %[step1_5] \n\t"
"add %[step1_7], %[step1_7], %[step1_6] \n\t"
"extp %[step1_5], $ac0, 31 \n\t"
"extp %[step1_6], $ac1, 31 \n\t"
"add %[Temp0], %[step1_0], %[step1_7] \n\t"
"sh %[Temp0], 0(%[output]) \n\t"
"add %[Temp1], %[step1_1], %[step1_6] \n\t"
"sh %[Temp1], 16(%[output]) \n\t"
"add %[Temp0], %[step1_2], %[step1_5] \n\t"
"sh %[Temp0], 32(%[output]) \n\t"
"add %[Temp1], %[step1_3], %[step1_4] \n\t"
"sh %[Temp1], 48(%[output]) \n\t"
"sub %[Temp0], %[step1_3], %[step1_4] \n\t"
"sh %[Temp0], 64(%[output]) \n\t"
"sub %[Temp1], %[step1_2], %[step1_5] \n\t"
"sh %[Temp1], 80(%[output]) \n\t"
"sub %[Temp0], %[step1_1], %[step1_6] \n\t"
"sh %[Temp0], 96(%[output]) \n\t"
"sub %[Temp1], %[step1_0], %[step1_7] \n\t"
"sh %[Temp1], 112(%[output]) \n\t"
: [step1_0] "=&r" (step1_0), [step1_1] "=&r" (step1_1),
[step1_2] "=&r" (step1_2), [step1_3] "=&r" (step1_3),
[step1_4] "=&r" (step1_4), [step1_5] "=&r" (step1_5),
[step1_6] "=&r" (step1_6), [step1_7] "=&r" (step1_7),
[Temp0] "=&r" (Temp0), [Temp1] "=&r" (Temp1),
[Temp2] "=&r" (Temp2), [Temp3] "=&r" (Temp3),
[Temp4] "=&r" (Temp4)
: [const_2_power_13] "r" (const_2_power_13),
[cospi_16_64] "r" (cospi_16_64), [cospi_28_64] "r" (cospi_28_64),
[cospi_4_64] "r" (cospi_4_64), [cospi_12_64] "r" (cospi_12_64),
[cospi_20_64] "r" (cospi_20_64), [cospi_8_64] "r" (cospi_8_64),
[cospi_24_64] "r" (cospi_24_64),
[output] "r" (output), [input] "r" (input)
);
input += 8;
output += 1;
}
}
void idct8_columns_add_blk_dspr2(int16_t *input, uint8_t *dest,
int dest_stride) {
int step1_0, step1_1, step1_2, step1_3, step1_4, step1_5, step1_6, step1_7;
int Temp0, Temp1, Temp2, Temp3;
int i;
const int const_2_power_13 = 8192;
uint8_t *dest_pix;
uint8_t *cm = vpx_ff_cropTbl;
/* prefetch vpx_ff_cropTbl */
prefetch_load(vpx_ff_cropTbl);
prefetch_load(vpx_ff_cropTbl + 32);
prefetch_load(vpx_ff_cropTbl + 64);
prefetch_load(vpx_ff_cropTbl + 96);
prefetch_load(vpx_ff_cropTbl + 128);
prefetch_load(vpx_ff_cropTbl + 160);
prefetch_load(vpx_ff_cropTbl + 192);
prefetch_load(vpx_ff_cropTbl + 224);
for (i = 0; i < 8; ++i) {
dest_pix = (dest + i);
__asm__ __volatile__ (
/*
temp_1 = (input[0] + input[4]) * cospi_16_64;
step2_0 = dct_const_round_shift(temp_1);
temp_2 = (input[0] - input[4]) * cospi_16_64;
step2_1 = dct_const_round_shift(temp_2);
*/
"lh %[Temp0], 0(%[input]) \n\t"
"lh %[Temp1], 8(%[input]) \n\t"
"mtlo %[const_2_power_13], $ac0 \n\t"
"mthi $zero, $ac0 \n\t"
"mtlo %[const_2_power_13], $ac1 \n\t"
"mthi $zero, $ac1 \n\t"
"add %[Temp2], %[Temp0], %[Temp1] \n\t"
"madd $ac0, %[Temp2], %[cospi_16_64] \n\t"
"extp %[step1_6], $ac0, 31 \n\t"
"sub %[Temp3], %[Temp0], %[Temp1] \n\t"
"madd $ac1, %[Temp3], %[cospi_16_64] \n\t"
"mtlo %[const_2_power_13], $ac0 \n\t"
"mthi $zero, $ac0 \n\t"
"extp %[Temp2], $ac1, 31 \n\t"
/*
temp_1 = input[2] * cospi_24_64 - input[6] * cospi_8_64;
step2_2 = dct_const_round_shift(temp_1);
*/
"lh %[Temp0], 4(%[input]) \n\t"
"lh %[Temp1], 12(%[input]) \n\t"
"madd $ac0, %[Temp0], %[cospi_24_64] \n\t"
"msub $ac0, %[Temp1], %[cospi_8_64] \n\t"
"mtlo %[const_2_power_13], $ac1 \n\t"
"mthi $zero, $ac1 \n\t"
"extp %[Temp3], $ac0, 31 \n\t"
/*
step1_1 = step2_1 + step2_2;
step1_2 = step2_1 - step2_2;
*/
"add %[step1_1], %[Temp2], %[Temp3] \n\t"
"sub %[step1_2], %[Temp2], %[Temp3] \n\t"
/*
temp_2 = input[2] * cospi_8_64 + input[6] * cospi_24_64;
step2_3 = dct_const_round_shift(temp_2);
*/
"madd $ac1, %[Temp0], %[cospi_8_64] \n\t"
"madd $ac1, %[Temp1], %[cospi_24_64] \n\t"
"extp %[Temp1], $ac1, 31 \n\t"
"mtlo %[const_2_power_13], $ac0 \n\t"
"mthi $zero, $ac0 \n\t"
/*
step1_0 = step2_0 + step2_3;
step1_3 = step2_0 - step2_3;
*/
"add %[step1_0], %[step1_6], %[Temp1] \n\t"
"sub %[step1_3], %[step1_6], %[Temp1] \n\t"
/*
temp_1 = input[1] * cospi_28_64 - input[7] * cospi_4_64;
step1_4 = dct_const_round_shift(temp_1);
*/
"lh %[Temp0], 2(%[input]) \n\t"
"madd $ac0, %[Temp0], %[cospi_28_64] \n\t"
"mtlo %[const_2_power_13], $ac1 \n\t"
"mthi $zero, $ac1 \n\t"
"lh %[Temp1], 14(%[input]) \n\t"
"lh %[Temp0], 2(%[input]) \n\t"
"msub $ac0, %[Temp1], %[cospi_4_64] \n\t"
"extp %[step1_4], $ac0, 31 \n\t"
/*
temp_2 = input[1] * cospi_4_64 + input[7] * cospi_28_64;
step1_7 = dct_const_round_shift(temp_2);
*/
"madd $ac1, %[Temp0], %[cospi_4_64] \n\t"
"madd $ac1, %[Temp1], %[cospi_28_64] \n\t"
"extp %[step1_7], $ac1, 31 \n\t"
/*
temp_1 = input[5] * cospi_12_64 - input[3] * cospi_20_64;
step1_5 = dct_const_round_shift(temp_1);
*/
"mtlo %[const_2_power_13], $ac0 \n\t"
"mthi $zero, $ac0 \n\t"
"lh %[Temp0], 10(%[input]) \n\t"
"madd $ac0, %[Temp0], %[cospi_12_64] \n\t"
"lh %[Temp1], 6(%[input]) \n\t"
"msub $ac0, %[Temp1], %[cospi_20_64] \n\t"
"extp %[step1_5], $ac0, 31 \n\t"
/*
temp_2 = input[5] * cospi_20_64 + input[3] * cospi_12_64;
step1_6 = dct_const_round_shift(temp_2);
*/
"mtlo %[const_2_power_13], $ac1 \n\t"
"mthi $zero, $ac1 \n\t"
"lh %[Temp0], 10(%[input]) \n\t"
"madd $ac1, %[Temp0], %[cospi_20_64] \n\t"
"lh %[Temp1], 6(%[input]) \n\t"
"madd $ac1, %[Temp1], %[cospi_12_64] \n\t"
"extp %[step1_6], $ac1, 31 \n\t"
/*
temp_1 = (step1_7 - step1_6 - step1_4 + step1_5) * cospi_16_64;
temp_2 = (step1_4 - step1_5 - step1_6 + step1_7) * cospi_16_64;
*/
"sub %[Temp0], %[step1_7], %[step1_6] \n\t"
"sub %[Temp0], %[Temp0], %[step1_4] \n\t"
"add %[Temp0], %[Temp0], %[step1_5] \n\t"
"sub %[Temp1], %[step1_4], %[step1_5] \n\t"
"sub %[Temp1], %[Temp1], %[step1_6] \n\t"
"add %[Temp1], %[Temp1], %[step1_7] \n\t"
"mtlo %[const_2_power_13], $ac0 \n\t"
"mthi $zero, $ac0 \n\t"
"mtlo %[const_2_power_13], $ac1 \n\t"
"mthi $zero, $ac1 \n\t"
"madd $ac0, %[Temp0], %[cospi_16_64] \n\t"
"madd $ac1, %[Temp1], %[cospi_16_64] \n\t"
/*
step1_4 = step1_4 + step1_5;
step1_7 = step1_6 + step1_7;
*/
"add %[step1_4], %[step1_4], %[step1_5] \n\t"
"add %[step1_7], %[step1_7], %[step1_6] \n\t"
"extp %[step1_5], $ac0, 31 \n\t"
"extp %[step1_6], $ac1, 31 \n\t"
/* add block */
"lbu %[Temp1], 0(%[dest_pix]) \n\t"
"add %[Temp0], %[step1_0], %[step1_7] \n\t"
"addi %[Temp0], %[Temp0], 16 \n\t"
"sra %[Temp0], %[Temp0], 5 \n\t"
"add %[Temp1], %[Temp1], %[Temp0] \n\t"
"add %[Temp0], %[step1_1], %[step1_6] \n\t"
"lbux %[Temp2], %[Temp1](%[cm]) \n\t"
"sb %[Temp2], 0(%[dest_pix]) \n\t"
"addu %[dest_pix], %[dest_pix], %[dest_stride] \n\t"
"lbu %[Temp1], 0(%[dest_pix]) \n\t"
"addi %[Temp0], %[Temp0], 16 \n\t"
"sra %[Temp0], %[Temp0], 5 \n\t"
"add %[Temp1], %[Temp1], %[Temp0] \n\t"
"add %[Temp0], %[step1_2], %[step1_5] \n\t"
"lbux %[Temp2], %[Temp1](%[cm]) \n\t"
"sb %[Temp2], 0(%[dest_pix]) \n\t"
"addu %[dest_pix], %[dest_pix], %[dest_stride] \n\t"
"lbu %[Temp1], 0(%[dest_pix]) \n\t"
"addi %[Temp0], %[Temp0], 16 \n\t"
"sra %[Temp0], %[Temp0], 5 \n\t"
"add %[Temp1], %[Temp1], %[Temp0] \n\t"
"add %[Temp0], %[step1_3], %[step1_4] \n\t"
"lbux %[Temp2], %[Temp1](%[cm]) \n\t"
"sb %[Temp2], 0(%[dest_pix]) \n\t"
"addu %[dest_pix], %[dest_pix], %[dest_stride] \n\t"
"lbu %[Temp1], 0(%[dest_pix]) \n\t"
"addi %[Temp0], %[Temp0], 16 \n\t"
"sra %[Temp0], %[Temp0], 5 \n\t"
"add %[Temp1], %[Temp1], %[Temp0] \n\t"
"sub %[Temp0], %[step1_3], %[step1_4] \n\t"
"lbux %[Temp2], %[Temp1](%[cm]) \n\t"
"sb %[Temp2], 0(%[dest_pix]) \n\t"
"addu %[dest_pix], %[dest_pix], %[dest_stride] \n\t"
"lbu %[Temp1], 0(%[dest_pix]) \n\t"
"addi %[Temp0], %[Temp0], 16 \n\t"
"sra %[Temp0], %[Temp0], 5 \n\t"
"add %[Temp1], %[Temp1], %[Temp0] \n\t"
"sub %[Temp0], %[step1_2], %[step1_5] \n\t"
"lbux %[Temp2], %[Temp1](%[cm]) \n\t"
"sb %[Temp2], 0(%[dest_pix]) \n\t"
"addu %[dest_pix], %[dest_pix], %[dest_stride] \n\t"
"lbu %[Temp1], 0(%[dest_pix]) \n\t"
"addi %[Temp0], %[Temp0], 16 \n\t"
"sra %[Temp0], %[Temp0], 5 \n\t"
"add %[Temp1], %[Temp1], %[Temp0] \n\t"
"sub %[Temp0], %[step1_1], %[step1_6] \n\t"
"lbux %[Temp2], %[Temp1](%[cm]) \n\t"
"sb %[Temp2], 0(%[dest_pix]) \n\t"
"addu %[dest_pix], %[dest_pix], %[dest_stride] \n\t"
"lbu %[Temp1], 0(%[dest_pix]) \n\t"
"addi %[Temp0], %[Temp0], 16 \n\t"
"sra %[Temp0], %[Temp0], 5 \n\t"
"add %[Temp1], %[Temp1], %[Temp0] \n\t"
"sub %[Temp0], %[step1_0], %[step1_7] \n\t"
"lbux %[Temp2], %[Temp1](%[cm]) \n\t"
"sb %[Temp2], 0(%[dest_pix]) \n\t"
"addu %[dest_pix], %[dest_pix], %[dest_stride] \n\t"
"lbu %[Temp1], 0(%[dest_pix]) \n\t"
"addi %[Temp0], %[Temp0], 16 \n\t"
"sra %[Temp0], %[Temp0], 5 \n\t"
"add %[Temp1], %[Temp1], %[Temp0] \n\t"
"lbux %[Temp2], %[Temp1](%[cm]) \n\t"
"sb %[Temp2], 0(%[dest_pix]) \n\t"
: [step1_0] "=&r" (step1_0), [step1_1] "=&r" (step1_1),
[step1_2] "=&r" (step1_2), [step1_3] "=&r" (step1_3),
[step1_4] "=&r" (step1_4), [step1_5] "=&r" (step1_5),
[step1_6] "=&r" (step1_6), [step1_7] "=&r" (step1_7),
[Temp0] "=&r" (Temp0), [Temp1] "=&r" (Temp1),
[Temp2] "=&r" (Temp2), [Temp3] "=&r" (Temp3),
[dest_pix] "+r" (dest_pix)
: [const_2_power_13] "r" (const_2_power_13),
[cospi_16_64] "r" (cospi_16_64), [cospi_28_64] "r" (cospi_28_64),
[cospi_4_64] "r" (cospi_4_64), [cospi_12_64] "r" (cospi_12_64),
[cospi_20_64] "r" (cospi_20_64), [cospi_8_64] "r" (cospi_8_64),
[cospi_24_64] "r" (cospi_24_64),
[input] "r" (input), [cm] "r" (cm), [dest_stride] "r" (dest_stride)
);
input += 8;
}
}
void vpx_idct8x8_64_add_dspr2(const int16_t *input, uint8_t *dest,
int dest_stride) {
DECLARE_ALIGNED(32, int16_t, out[8 * 8]);
int16_t *outptr = out;
uint32_t pos = 45;
/* bit positon for extract from acc */
__asm__ __volatile__ (
"wrdsp %[pos], 1 \n\t"
:
: [pos] "r" (pos)
);
// First transform rows
idct8_rows_dspr2(input, outptr, 8);
// Then transform columns and add to dest
idct8_columns_add_blk_dspr2(&out[0], dest, dest_stride);
}
void vpx_idct8x8_12_add_dspr2(const int16_t *input, uint8_t *dest,
int dest_stride) {
DECLARE_ALIGNED(32, int16_t, out[8 * 8]);
int16_t *outptr = out;
uint32_t pos = 45;
/* bit positon for extract from acc */
__asm__ __volatile__ (
"wrdsp %[pos], 1 \n\t"
:
: [pos] "r" (pos)
);
// First transform rows
idct8_rows_dspr2(input, outptr, 4);
outptr += 4;
__asm__ __volatile__ (
"sw $zero, 0(%[outptr]) \n\t"
"sw $zero, 4(%[outptr]) \n\t"
"sw $zero, 16(%[outptr]) \n\t"
"sw $zero, 20(%[outptr]) \n\t"
"sw $zero, 32(%[outptr]) \n\t"
"sw $zero, 36(%[outptr]) \n\t"
"sw $zero, 48(%[outptr]) \n\t"
"sw $zero, 52(%[outptr]) \n\t"
"sw $zero, 64(%[outptr]) \n\t"
"sw $zero, 68(%[outptr]) \n\t"
"sw $zero, 80(%[outptr]) \n\t"
"sw $zero, 84(%[outptr]) \n\t"
"sw $zero, 96(%[outptr]) \n\t"
"sw $zero, 100(%[outptr]) \n\t"
"sw $zero, 112(%[outptr]) \n\t"
"sw $zero, 116(%[outptr]) \n\t"
:
: [outptr] "r" (outptr)
);
// Then transform columns and add to dest
idct8_columns_add_blk_dspr2(&out[0], dest, dest_stride);
}
void vpx_idct8x8_1_add_dspr2(const int16_t *input, uint8_t *dest,
int dest_stride) {
uint32_t pos = 45;
int32_t out;
int32_t r;
int32_t a1, absa1;
int32_t t1, t2, vector_a1, vector_1, vector_2;
/* bit positon for extract from acc */
__asm__ __volatile__ (
"wrdsp %[pos], 1 \n\t"
:
: [pos] "r" (pos)
);
out = DCT_CONST_ROUND_SHIFT_TWICE_COSPI_16_64(input[0]);
__asm__ __volatile__ (
"addi %[out], %[out], 16 \n\t"
"sra %[a1], %[out], 5 \n\t"
: [out] "+r" (out), [a1] "=r" (a1)
:
);
if (a1 < 0) {
/* use quad-byte
* input and output memory are four byte aligned */
__asm__ __volatile__ (
"abs %[absa1], %[a1] \n\t"
"replv.qb %[vector_a1], %[absa1] \n\t"
: [absa1] "=r" (absa1), [vector_a1] "=r" (vector_a1)
: [a1] "r" (a1)
);
for (r = 8; r--;) {
__asm__ __volatile__ (
"lw %[t1], 0(%[dest]) \n\t"
"lw %[t2], 4(%[dest]) \n\t"
"subu_s.qb %[vector_1], %[t1], %[vector_a1] \n\t"
"subu_s.qb %[vector_2], %[t2], %[vector_a1] \n\t"
"sw %[vector_1], 0(%[dest]) \n\t"
"sw %[vector_2], 4(%[dest]) \n\t"
"add %[dest], %[dest], %[dest_stride] \n\t"
: [t1] "=&r" (t1), [t2] "=&r" (t2),
[vector_1] "=&r" (vector_1), [vector_2] "=&r" (vector_2),
[dest] "+&r" (dest)
: [dest_stride] "r" (dest_stride), [vector_a1] "r" (vector_a1)
);
}
} else {
/* use quad-byte
* input and output memory are four byte aligned */
__asm__ __volatile__ (
"replv.qb %[vector_a1], %[a1] \n\t"
: [vector_a1] "=r" (vector_a1)
: [a1] "r" (a1)
);
for (r = 8; r--;) {
__asm__ __volatile__ (
"lw %[t1], 0(%[dest]) \n\t"
"lw %[t2], 4(%[dest]) \n\t"
"addu_s.qb %[vector_1], %[t1], %[vector_a1] \n\t"
"addu_s.qb %[vector_2], %[t2], %[vector_a1] \n\t"
"sw %[vector_1], 0(%[dest]) \n\t"
"sw %[vector_2], 4(%[dest]) \n\t"
"add %[dest], %[dest], %[dest_stride] \n\t"
: [t1] "=&r" (t1), [t2] "=&r" (t2),
[vector_1] "=&r" (vector_1), [vector_2] "=&r" (vector_2),
[dest] "+r" (dest)
: [dest_stride] "r" (dest_stride), [vector_a1] "r" (vector_a1)
);
}
}
}
void iadst8_dspr2(const int16_t *input, int16_t *output) {
int s0, s1, s2, s3, s4, s5, s6, s7;
int x0, x1, x2, x3, x4, x5, x6, x7;
x0 = input[7];
x1 = input[0];
x2 = input[5];
x3 = input[2];
x4 = input[3];
x5 = input[4];
x6 = input[1];
x7 = input[6];
if (!(x0 | x1 | x2 | x3 | x4 | x5 | x6 | x7)) {
output[0] = output[1] = output[2] = output[3] = output[4]
= output[5] = output[6] = output[7] = 0;
return;
}
// stage 1
s0 = cospi_2_64 * x0 + cospi_30_64 * x1;
s1 = cospi_30_64 * x0 - cospi_2_64 * x1;
s2 = cospi_10_64 * x2 + cospi_22_64 * x3;
s3 = cospi_22_64 * x2 - cospi_10_64 * x3;
s4 = cospi_18_64 * x4 + cospi_14_64 * x5;
s5 = cospi_14_64 * x4 - cospi_18_64 * x5;
s6 = cospi_26_64 * x6 + cospi_6_64 * x7;
s7 = cospi_6_64 * x6 - cospi_26_64 * x7;
x0 = ROUND_POWER_OF_TWO((s0 + s4), DCT_CONST_BITS);
x1 = ROUND_POWER_OF_TWO((s1 + s5), DCT_CONST_BITS);
x2 = ROUND_POWER_OF_TWO((s2 + s6), DCT_CONST_BITS);
x3 = ROUND_POWER_OF_TWO((s3 + s7), DCT_CONST_BITS);
x4 = ROUND_POWER_OF_TWO((s0 - s4), DCT_CONST_BITS);
x5 = ROUND_POWER_OF_TWO((s1 - s5), DCT_CONST_BITS);
x6 = ROUND_POWER_OF_TWO((s2 - s6), DCT_CONST_BITS);
x7 = ROUND_POWER_OF_TWO((s3 - s7), DCT_CONST_BITS);
// stage 2
s0 = x0;
s1 = x1;
s2 = x2;
s3 = x3;
s4 = cospi_8_64 * x4 + cospi_24_64 * x5;
s5 = cospi_24_64 * x4 - cospi_8_64 * x5;
s6 = -cospi_24_64 * x6 + cospi_8_64 * x7;
s7 = cospi_8_64 * x6 + cospi_24_64 * x7;
x0 = s0 + s2;
x1 = s1 + s3;
x2 = s0 - s2;
x3 = s1 - s3;
x4 = ROUND_POWER_OF_TWO((s4 + s6), DCT_CONST_BITS);
x5 = ROUND_POWER_OF_TWO((s5 + s7), DCT_CONST_BITS);
x6 = ROUND_POWER_OF_TWO((s4 - s6), DCT_CONST_BITS);
x7 = ROUND_POWER_OF_TWO((s5 - s7), DCT_CONST_BITS);
// stage 3
s2 = cospi_16_64 * (x2 + x3);
s3 = cospi_16_64 * (x2 - x3);
s6 = cospi_16_64 * (x6 + x7);
s7 = cospi_16_64 * (x6 - x7);
x2 = ROUND_POWER_OF_TWO((s2), DCT_CONST_BITS);
x3 = ROUND_POWER_OF_TWO((s3), DCT_CONST_BITS);
x6 = ROUND_POWER_OF_TWO((s6), DCT_CONST_BITS);
x7 = ROUND_POWER_OF_TWO((s7), DCT_CONST_BITS);
output[0] = x0;
output[1] = -x4;
output[2] = x6;
output[3] = -x2;
output[4] = x3;
output[5] = -x7;
output[6] = x5;
output[7] = -x1;
}
#endif // HAVE_DSPR2