ref: 5993b808f03874570830b30f3c91501a04e0964c
dir: /vpx_dsp/mips/itrans4_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 vpx_idct4_rows_dspr2(const int16_t *input, int16_t *output) { int16_t step_0, step_1, step_2, step_3; int Temp0, Temp1, Temp2, Temp3; const int const_2_power_13 = 8192; int i; for (i = 4; i--;) { __asm__ __volatile__( /* temp_1 = (input[0] + input[2]) * cospi_16_64; step_0 = dct_const_round_shift(temp_1); temp_2 = (input[0] - input[2]) * cospi_16_64; step_1 = dct_const_round_shift(temp_2); */ "lh %[Temp0], 0(%[input]) \n\t" "lh %[Temp1], 4(%[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" "sub %[Temp3], %[Temp0], %[Temp1] \n\t" "madd $ac0, %[Temp2], %[cospi_16_64] \n\t" "lh %[Temp0], 2(%[input]) \n\t" "lh %[Temp1], 6(%[input]) \n\t" "extp %[step_0], $ac0, 31 \n\t" "mtlo %[const_2_power_13], $ac0 \n\t" "mthi $zero, $ac0 \n\t" "madd $ac1, %[Temp3], %[cospi_16_64] \n\t" "extp %[step_1], $ac1, 31 \n\t" "mtlo %[const_2_power_13], $ac1 \n\t" "mthi $zero, $ac1 \n\t" /* temp1 = input[1] * cospi_24_64 - input[3] * cospi_8_64; step_2 = dct_const_round_shift(temp1); */ "madd $ac0, %[Temp0], %[cospi_24_64] \n\t" "msub $ac0, %[Temp1], %[cospi_8_64] \n\t" "extp %[step_2], $ac0, 31 \n\t" /* temp2 = input[1] * cospi_8_64 + input[3] * cospi_24_64; step_3 = dct_const_round_shift(temp2); */ "madd $ac1, %[Temp0], %[cospi_8_64] \n\t" "madd $ac1, %[Temp1], %[cospi_24_64] \n\t" "extp %[step_3], $ac1, 31 \n\t" /* output[0] = step_0 + step_3; output[4] = step_1 + step_2; output[8] = step_1 - step_2; output[12] = step_0 - step_3; */ "add %[Temp0], %[step_0], %[step_3] \n\t" "sh %[Temp0], 0(%[output]) \n\t" "add %[Temp1], %[step_1], %[step_2] \n\t" "sh %[Temp1], 8(%[output]) \n\t" "sub %[Temp2], %[step_1], %[step_2] \n\t" "sh %[Temp2], 16(%[output]) \n\t" "sub %[Temp3], %[step_0], %[step_3] \n\t" "sh %[Temp3], 24(%[output]) \n\t" : [Temp0] "=&r"(Temp0), [Temp1] "=&r"(Temp1), [Temp2] "=&r"(Temp2), [Temp3] "=&r"(Temp3), [step_0] "=&r"(step_0), [step_1] "=&r"(step_1), [step_2] "=&r"(step_2), [step_3] "=&r"(step_3), [output] "+r"(output) : [const_2_power_13] "r"(const_2_power_13), [cospi_8_64] "r"(cospi_8_64), [cospi_16_64] "r"(cospi_16_64), [cospi_24_64] "r"(cospi_24_64), [input] "r"(input)); input += 4; output += 1; } } void vpx_idct4_columns_add_blk_dspr2(int16_t *input, uint8_t *dest, int stride) { int16_t step_0, step_1, step_2, step_3; int Temp0, Temp1, Temp2, Temp3; const int const_2_power_13 = 8192; int i; 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 < 4; ++i) { dest_pix = (dest + i); __asm__ __volatile__( /* temp_1 = (input[0] + input[2]) * cospi_16_64; step_0 = dct_const_round_shift(temp_1); temp_2 = (input[0] - input[2]) * cospi_16_64; step_1 = dct_const_round_shift(temp_2); */ "lh %[Temp0], 0(%[input]) \n\t" "lh %[Temp1], 4(%[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" "sub %[Temp3], %[Temp0], %[Temp1] \n\t" "madd $ac0, %[Temp2], %[cospi_16_64] \n\t" "lh %[Temp0], 2(%[input]) \n\t" "lh %[Temp1], 6(%[input]) \n\t" "extp %[step_0], $ac0, 31 \n\t" "mtlo %[const_2_power_13], $ac0 \n\t" "mthi $zero, $ac0 \n\t" "madd $ac1, %[Temp3], %[cospi_16_64] \n\t" "extp %[step_1], $ac1, 31 \n\t" "mtlo %[const_2_power_13], $ac1 \n\t" "mthi $zero, $ac1 \n\t" /* temp1 = input[1] * cospi_24_64 - input[3] * cospi_8_64; step_2 = dct_const_round_shift(temp1); */ "madd $ac0, %[Temp0], %[cospi_24_64] \n\t" "msub $ac0, %[Temp1], %[cospi_8_64] \n\t" "extp %[step_2], $ac0, 31 \n\t" /* temp2 = input[1] * cospi_8_64 + input[3] * cospi_24_64; step_3 = dct_const_round_shift(temp2); */ "madd $ac1, %[Temp0], %[cospi_8_64] \n\t" "madd $ac1, %[Temp1], %[cospi_24_64] \n\t" "extp %[step_3], $ac1, 31 \n\t" /* output[0] = step_0 + step_3; output[4] = step_1 + step_2; output[8] = step_1 - step_2; output[12] = step_0 - step_3; */ "add %[Temp0], %[step_0], %[step_3] \n\t" "addi %[Temp0], %[Temp0], 8 \n\t" "sra %[Temp0], %[Temp0], 4 \n\t" "lbu %[Temp1], 0(%[dest_pix]) \n\t" "add %[Temp1], %[Temp1], %[Temp0] \n\t" "add %[Temp0], %[step_1], %[step_2] \n\t" "lbux %[Temp2], %[Temp1](%[cm]) \n\t" "sb %[Temp2], 0(%[dest_pix]) \n\t" "addu %[dest_pix], %[dest_pix], %[stride] \n\t" "addi %[Temp0], %[Temp0], 8 \n\t" "sra %[Temp0], %[Temp0], 4 \n\t" "lbu %[Temp1], 0(%[dest_pix]) \n\t" "add %[Temp1], %[Temp1], %[Temp0] \n\t" "sub %[Temp0], %[step_1], %[step_2] \n\t" "lbux %[Temp2], %[Temp1](%[cm]) \n\t" "sb %[Temp2], 0(%[dest_pix]) \n\t" "addu %[dest_pix], %[dest_pix], %[stride] \n\t" "addi %[Temp0], %[Temp0], 8 \n\t" "sra %[Temp0], %[Temp0], 4 \n\t" "lbu %[Temp1], 0(%[dest_pix]) \n\t" "add %[Temp1], %[Temp1], %[Temp0] \n\t" "sub %[Temp0], %[step_0], %[step_3] \n\t" "lbux %[Temp2], %[Temp1](%[cm]) \n\t" "sb %[Temp2], 0(%[dest_pix]) \n\t" "addu %[dest_pix], %[dest_pix], %[stride] \n\t" "addi %[Temp0], %[Temp0], 8 \n\t" "sra %[Temp0], %[Temp0], 4 \n\t" "lbu %[Temp1], 0(%[dest_pix]) \n\t" "add %[Temp1], %[Temp1], %[Temp0] \n\t" "lbux %[Temp2], %[Temp1](%[cm]) \n\t" "sb %[Temp2], 0(%[dest_pix]) \n\t" : [Temp0] "=&r"(Temp0), [Temp1] "=&r"(Temp1), [Temp2] "=&r"(Temp2), [Temp3] "=&r"(Temp3), [step_0] "=&r"(step_0), [step_1] "=&r"(step_1), [step_2] "=&r"(step_2), [step_3] "=&r"(step_3), [dest_pix] "+r"(dest_pix) : [const_2_power_13] "r"(const_2_power_13), [cospi_8_64] "r"(cospi_8_64), [cospi_16_64] "r"(cospi_16_64), [cospi_24_64] "r"(cospi_24_64), [input] "r"(input), [cm] "r"(cm), [stride] "r"(stride)); input += 4; } } void vpx_idct4x4_16_add_dspr2(const int16_t *input, uint8_t *dest, int stride) { DECLARE_ALIGNED(32, int16_t, out[4 * 4]); int16_t *outptr = out; uint32_t pos = 45; /* bit positon for extract from acc */ __asm__ __volatile__("wrdsp %[pos], 1 \n\t" : : [pos] "r"(pos)); // Rows vpx_idct4_rows_dspr2(input, outptr); // Columns vpx_idct4_columns_add_blk_dspr2(&out[0], dest, stride); } void vpx_idct4x4_1_add_dspr2(const int16_t *input, uint8_t *dest, int stride) { int a1, absa1; int r; int32_t out; int t2, vector_a1, vector_a; uint32_t pos = 45; int16_t input_dc = input[0]; /* 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_dc); __asm__ __volatile__( "addi %[out], %[out], 8 \n\t" "sra %[a1], %[out], 4 \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 = 4; r--;) { __asm__ __volatile__( "lw %[t2], 0(%[dest]) \n\t" "subu_s.qb %[vector_a], %[t2], %[vector_a1] \n\t" "sw %[vector_a], 0(%[dest]) \n\t" "add %[dest], %[dest], %[stride] \n\t" : [t2] "=&r"(t2), [vector_a] "=&r"(vector_a), [dest] "+&r"(dest) : [stride] "r"(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 = 4; r--;) { __asm__ __volatile__( "lw %[t2], 0(%[dest]) \n\t" "addu_s.qb %[vector_a], %[t2], %[vector_a1] \n\t" "sw %[vector_a], 0(%[dest]) \n\t" "add %[dest], %[dest], %[stride] \n\t" : [t2] "=&r"(t2), [vector_a] "=&r"(vector_a), [dest] "+&r"(dest) : [stride] "r"(stride), [vector_a1] "r"(vector_a1)); } } } void iadst4_dspr2(const int16_t *input, int16_t *output) { int s0, s1, s2, s3, s4, s5, s6, s7; int x0, x1, x2, x3; x0 = input[0]; x1 = input[1]; x2 = input[2]; x3 = input[3]; if (!(x0 | x1 | x2 | x3)) { output[0] = output[1] = output[2] = output[3] = 0; return; } s0 = sinpi_1_9 * x0; s1 = sinpi_2_9 * x0; s2 = sinpi_3_9 * x1; s3 = sinpi_4_9 * x2; s4 = sinpi_1_9 * x2; s5 = sinpi_2_9 * x3; s6 = sinpi_4_9 * x3; s7 = x0 - x2 + x3; x0 = s0 + s3 + s5; x1 = s1 - s4 - s6; x2 = sinpi_3_9 * s7; x3 = s2; s0 = x0 + x3; s1 = x1 + x3; s2 = x2; s3 = x0 + x1 - x3; // 1-D transform scaling factor is sqrt(2). // The overall dynamic range is 14b (input) + 14b (multiplication scaling) // + 1b (addition) = 29b. // Hence the output bit depth is 15b. output[0] = dct_const_round_shift(s0); output[1] = dct_const_round_shift(s1); output[2] = dct_const_round_shift(s2); output[3] = dct_const_round_shift(s3); } #endif // #if HAVE_DSPR2