| ; |
| ; Copyright (c) 2013 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. |
| ; |
| |
| ;TODO(cd): adjust these constant to be able to use vqdmulh for faster |
| ; dct_const_round_shift(a * b) within butterfly calculations. |
| cospi_1_64 EQU 16364 |
| cospi_2_64 EQU 16305 |
| cospi_3_64 EQU 16207 |
| cospi_4_64 EQU 16069 |
| cospi_5_64 EQU 15893 |
| cospi_6_64 EQU 15679 |
| cospi_7_64 EQU 15426 |
| cospi_8_64 EQU 15137 |
| cospi_9_64 EQU 14811 |
| cospi_10_64 EQU 14449 |
| cospi_11_64 EQU 14053 |
| cospi_12_64 EQU 13623 |
| cospi_13_64 EQU 13160 |
| cospi_14_64 EQU 12665 |
| cospi_15_64 EQU 12140 |
| cospi_16_64 EQU 11585 |
| cospi_17_64 EQU 11003 |
| cospi_18_64 EQU 10394 |
| cospi_19_64 EQU 9760 |
| cospi_20_64 EQU 9102 |
| cospi_21_64 EQU 8423 |
| cospi_22_64 EQU 7723 |
| cospi_23_64 EQU 7005 |
| cospi_24_64 EQU 6270 |
| cospi_25_64 EQU 5520 |
| cospi_26_64 EQU 4756 |
| cospi_27_64 EQU 3981 |
| cospi_28_64 EQU 3196 |
| cospi_29_64 EQU 2404 |
| cospi_30_64 EQU 1606 |
| cospi_31_64 EQU 804 |
| |
| |
| EXPORT |idct32_transpose_and_transform| |
| EXPORT |idct32_combine_add| |
| ARM |
| REQUIRE8 |
| PRESERVE8 |
| |
| AREA ||.text||, CODE, READONLY, ALIGN=2 |
| |
| AREA Block, CODE, READONLY |
| |
| ; -------------------------------------------------------------------------- |
| ; Load from transposed_buffer |
| ; q13 = transposed_buffer[first_offset] |
| ; q14 = transposed_buffer[second_offset] |
| ; for proper address calculation, the last offset used when manipulating |
| ; transposed_buffer must be passed in. use 0 for first use. |
| MACRO |
| LOAD_FROM_TRANSPOSED $prev_offset, $first_offset, $second_offset |
| ; address calculation with proper stride and loading |
| add r0, #($first_offset - $prev_offset )*8*2 |
| vld1.s16 {q14}, [r0] |
| add r0, #($second_offset - $first_offset)*8*2 |
| vld1.s16 {q13}, [r0] |
| ; (used) two registers (q14, q13) |
| MEND |
| ; -------------------------------------------------------------------------- |
| ; Load from output (used as temporary storage) |
| ; reg1 = output[first_offset] |
| ; reg2 = output[second_offset] |
| ; for proper address calculation, the last offset used when manipulating |
| ; output, wethere reading or storing) must be passed in. use 0 for first |
| ; use. |
| MACRO |
| LOAD_FROM_OUTPUT $prev_offset, $first_offset, $second_offset, $reg1, $reg2 |
| ; address calculation with proper stride and loading |
| add r1, #($first_offset - $prev_offset )*32*2 |
| vld1.s16 {$reg1}, [r1] |
| add r1, #($second_offset - $first_offset)*32*2 |
| vld1.s16 {$reg2}, [r1] |
| ; (used) two registers ($reg1, $reg2) |
| MEND |
| ; -------------------------------------------------------------------------- |
| ; Store into output (sometimes as as temporary storage) |
| ; output[first_offset] = reg1 |
| ; output[second_offset] = reg2 |
| ; for proper address calculation, the last offset used when manipulating |
| ; output, wethere reading or storing) must be passed in. use 0 for first |
| ; use. |
| MACRO |
| STORE_IN_OUTPUT $prev_offset, $first_offset, $second_offset, $reg1, $reg2 |
| ; address calculation with proper stride and storing |
| add r1, #($first_offset - $prev_offset )*32*2 |
| vst1.16 {$reg1}, [r1] |
| add r1, #($second_offset - $first_offset)*32*2 |
| vst1.16 {$reg2}, [r1] |
| MEND |
| ; -------------------------------------------------------------------------- |
| ; Touches q8-q12, q15 (q13-q14 are preserved) |
| ; valid output registers are anything but q8-q11 |
| MACRO |
| DO_BUTTERFLY $regC, $regD, $regA, $regB, $first_constant, $second_constant, $reg1, $reg2, $reg3, $reg4 |
| ; TODO(cd): have special case to re-use constants when they are similar for |
| ; consecutive butterflies |
| ; TODO(cd): have special case when both constants are the same, do the |
| ; additions/substractions before the multiplies. |
| ; generate the constants |
| ; generate scalar constants |
| mov r3, #$first_constant & 0xFF00 |
| add r3, #$first_constant & 0x00FF |
| mov r12, #$second_constant & 0xFF00 |
| add r12, #$second_constant & 0x00FF |
| ; generate vector constants |
| vdup.16 d30, r3 |
| vdup.16 d31, r12 |
| ; (used) two for inputs (regA-regD), one for constants (q15) |
| ; do some multiplications (ordered for maximum latency hiding) |
| vmull.s16 q8, $regC, d30 |
| vmull.s16 q10, $regA, d31 |
| vmull.s16 q9, $regD, d30 |
| vmull.s16 q11, $regB, d31 |
| vmull.s16 q12, $regC, d31 |
| ; (used) five for intermediate (q8-q12), one for constants (q15) |
| ; do some addition/substractions (to get back two register) |
| vsub.s32 q8, q8, q10 |
| vsub.s32 q9, q9, q11 |
| ; do more multiplications (ordered for maximum latency hiding) |
| vmull.s16 q10, $regD, d31 |
| vmull.s16 q11, $regA, d30 |
| vmull.s16 q15, $regB, d30 |
| ; (used) six for intermediate (q8-q12, q15) |
| ; do more addition/substractions |
| vadd.s32 q11, q12, q11 |
| vadd.s32 q10, q10, q15 |
| ; (used) four for intermediate (q8-q11) |
| ; dct_const_round_shift |
| vqrshrn.s32 $reg1, q8, #14 |
| vqrshrn.s32 $reg2, q9, #14 |
| vqrshrn.s32 $reg3, q11, #14 |
| vqrshrn.s32 $reg4, q10, #14 |
| ; (used) two for results, well four d registers |
| MEND |
| ; -------------------------------------------------------------------------- |
| ; Touches q8-q12, q15 (q13-q14 are preserved) |
| ; valid output registers are anything but q8-q11 |
| MACRO |
| DO_BUTTERFLY_STD $first_constant, $second_constant, $reg1, $reg2, $reg3, $reg4 |
| DO_BUTTERFLY d28, d29, d26, d27, $first_constant, $second_constant, $reg1, $reg2, $reg3, $reg4 |
| MEND |
| ; -------------------------------------------------------------------------- |
| |
| ;void idct32_transpose_and_transform(int16_t *transpose_buffer, int16_t *output, int16_t *input); |
| ; |
| ; r0 int16_t *transpose_buffer |
| ; r1 int16_t *output |
| ; r2 int16_t *input) |
| ; TODO(cd): have more logical parameter ordering but this issue will disappear |
| ; when functions are combined. |
| |
| |idct32_transpose_and_transform| PROC |
| ; This function does one pass of idct32x32 transform. |
| ; |
| ; This is done by transposing the input and then doing a 1d transform on |
| ; columns. In the first pass, the transposed columns are the original |
| ; rows. In the second pass, after the transposition, the colums are the |
| ; original columns. |
| ; The 1d transform is done by looping over bands of eight columns (the |
| ; idct32_bands loop). For each band, the transform input transposition |
| ; is done on demand, one band of four 8x8 matrices at a time. The four |
| ; matrices are trsnposed by pairs (the idct32_transpose_pair loop). |
| push {r4} |
| mov r4, #0 ; initialize bands loop counter |
| idct32_bands_loop |
| ; TODO(cd) get rid of these push/pop by properly adjusting register |
| ; content at end of loop |
| push {r0} |
| push {r1} |
| push {r2} |
| mov r3, #0 ; initialize transpose loop counter |
| idct32_transpose_pair_loop |
| ; Load two horizontally consecutive 8x8 16bit data matrices. The first one |
| ; into q0-q7 and the second one into q8-q15. There is a stride of 64, |
| ; adjusted to 32 because of the two post-increments. |
| vld1.s16 {q8}, [r2]! |
| vld1.s16 {q0}, [r2]! |
| add r2, #32 |
| vld1.s16 {q9}, [r2]! |
| vld1.s16 {q1}, [r2]! |
| add r2, #32 |
| vld1.s16 {q10}, [r2]! |
| vld1.s16 {q2}, [r2]! |
| add r2, #32 |
| vld1.s16 {q11}, [r2]! |
| vld1.s16 {q3}, [r2]! |
| add r2, #32 |
| vld1.s16 {q12}, [r2]! |
| vld1.s16 {q4}, [r2]! |
| add r2, #32 |
| vld1.s16 {q13}, [r2]! |
| vld1.s16 {q5}, [r2]! |
| add r2, #32 |
| vld1.s16 {q14}, [r2]! |
| vld1.s16 {q6}, [r2]! |
| add r2, #32 |
| vld1.s16 {q15}, [r2]! |
| vld1.s16 {q7}, [r2]! |
| |
| ; Transpose the two 8x8 16bit data matrices. |
| vswp d17, d24 |
| vswp d23, d30 |
| vswp d21, d28 |
| vswp d19, d26 |
| vswp d1, d8 |
| vswp d7, d14 |
| vswp d5, d12 |
| vswp d3, d10 |
| vtrn.32 q8, q10 |
| vtrn.32 q9, q11 |
| vtrn.32 q12, q14 |
| vtrn.32 q13, q15 |
| vtrn.32 q0, q2 |
| vtrn.32 q1, q3 |
| vtrn.32 q4, q6 |
| vtrn.32 q5, q7 |
| vtrn.16 q8, q9 |
| vtrn.16 q10, q11 |
| vtrn.16 q12, q13 |
| vtrn.16 q14, q15 |
| vtrn.16 q0, q1 |
| vtrn.16 q2, q3 |
| vtrn.16 q4, q5 |
| vtrn.16 q6, q7 |
| |
| ; Store both matrices after each other. There is a stride of 32, which |
| ; adjusts to nothing because of the post-increments. |
| vst1.16 {q8}, [r0]! |
| vst1.16 {q9}, [r0]! |
| vst1.16 {q10}, [r0]! |
| vst1.16 {q11}, [r0]! |
| vst1.16 {q12}, [r0]! |
| vst1.16 {q13}, [r0]! |
| vst1.16 {q14}, [r0]! |
| vst1.16 {q15}, [r0]! |
| vst1.16 {q0}, [r0]! |
| vst1.16 {q1}, [r0]! |
| vst1.16 {q2}, [r0]! |
| vst1.16 {q3}, [r0]! |
| vst1.16 {q4}, [r0]! |
| vst1.16 {q5}, [r0]! |
| vst1.16 {q6}, [r0]! |
| vst1.16 {q7}, [r0]! |
| |
| ; increment pointers by adjusted stride (not necessary for r0/out) |
| sub r2, r2, #8*32*2-32-16*2 |
| ; transpose pair loop processing |
| add r3, r3, #1 |
| cmp r3, #1 |
| ble idct32_transpose_pair_loop |
| |
| ; restore r0/input to its original value |
| sub r0, r0, #32*8*2 |
| |
| ; Instead of doing the transforms stage by stage, it is done by loading |
| ; some input values and doing as many stages as possible to minimize the |
| ; storing/loading of intermediate results. To fit within registers, the |
| ; final coefficients are cut into four blocks: |
| ; BLOCK A: 16-19,28-31 |
| ; BLOCK B: 20-23,24-27 |
| ; BLOCK C: 8-10,11-15 |
| ; BLOCK D: 0-3,4-7 |
| ; Blocks A and C are straight calculation through the various stages. In |
| ; block B, further calculations are performed using the results from |
| ; block A. In block D, further calculations are performed using the results |
| ; from block C and then the final calculations are done using results from |
| ; block A and B which have been combined at the end of block B. |
| |
| ; -------------------------------------------------------------------------- |
| ; BLOCK A: 16-19,28-31 |
| ; -------------------------------------------------------------------------- |
| ; generate 16,17,30,31 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 1 |
| ;temp1 = input[1 * 32] * cospi_31_64 - input[31 * 32] * cospi_1_64; |
| ;temp2 = input[1 * 32] * cospi_1_64 + input[31 * 32] * cospi_31_64; |
| ;step1b[16][i] = dct_const_round_shift(temp1); |
| ;step1b[31][i] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 0, 1, 31 |
| DO_BUTTERFLY_STD cospi_31_64, cospi_1_64, d0, d1, d4, d5 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 1 |
| ;temp1 = input[17 * 32] * cospi_15_64 - input[15 * 32] * cospi_17_64; |
| ;temp2 = input[17 * 32] * cospi_17_64 + input[15 * 32] * cospi_15_64; |
| ;step1b[17][i] = dct_const_round_shift(temp1); |
| ;step1b[30][i] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 31, 17, 15 |
| DO_BUTTERFLY_STD cospi_15_64, cospi_17_64, d2, d3, d6, d7 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 2 |
| ;step2[16] = step1b[16][i] + step1b[17][i]; |
| ;step2[17] = step1b[16][i] - step1b[17][i]; |
| ;step2[30] = -step1b[30][i] + step1b[31][i]; |
| ;step2[31] = step1b[30][i] + step1b[31][i]; |
| vadd.s16 q4, q0, q1 |
| vsub.s16 q13, q0, q1 |
| vadd.s16 q6, q2, q3 |
| vsub.s16 q14, q2, q3 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 3 |
| ;temp1 = step1b[30][i] * cospi_28_64 - step1b[17][i] * cospi_4_64; |
| ;temp2 = step1b[30][i] * cospi_4_64 - step1b[17][i] * cospi_28_64; |
| ;step3[17] = dct_const_round_shift(temp1); |
| ;step3[30] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD cospi_28_64, cospi_4_64, d10, d11, d14, d15 |
| ; -------------------------------------------------------------------------- |
| ; generate 18,19,28,29 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 1 |
| ;temp1 = input[9 * 32] * cospi_23_64 - input[23 * 32] * cospi_9_64; |
| ;temp2 = input[9 * 32] * cospi_9_64 + input[23 * 32] * cospi_23_64; |
| ;step1b[18][i] = dct_const_round_shift(temp1); |
| ;step1b[29][i] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 15, 9, 23 |
| DO_BUTTERFLY_STD cospi_23_64, cospi_9_64, d0, d1, d4, d5 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 1 |
| ;temp1 = input[25 * 32] * cospi_7_64 - input[7 * 32] * cospi_25_64; |
| ;temp2 = input[25 * 32] * cospi_25_64 + input[7 * 32] * cospi_7_64; |
| ;step1b[19][i] = dct_const_round_shift(temp1); |
| ;step1b[28][i] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 23, 25, 7 |
| DO_BUTTERFLY_STD cospi_7_64, cospi_25_64, d2, d3, d6, d7 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 2 |
| ;step2[18] = -step1b[18][i] + step1b[19][i]; |
| ;step2[19] = step1b[18][i] + step1b[19][i]; |
| ;step2[28] = step1b[28][i] + step1b[29][i]; |
| ;step2[29] = step1b[28][i] - step1b[29][i]; |
| vsub.s16 q13, q3, q2 |
| vadd.s16 q3, q3, q2 |
| vsub.s16 q14, q1, q0 |
| vadd.s16 q2, q1, q0 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 3 |
| ;temp1 = step1b[18][i] * (-cospi_4_64) - step1b[29][i] * (-cospi_28_64); |
| ;temp2 = step1b[18][i] * (-cospi_28_64) + step1b[29][i] * (-cospi_4_64); |
| ;step3[29] = dct_const_round_shift(temp1); |
| ;step3[18] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD (-cospi_4_64), (-cospi_28_64), d2, d3, d0, d1 |
| ; -------------------------------------------------------------------------- |
| ; combine 16-19,28-31 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 4 |
| ;step1[16] = step1b[16][i] + step1b[19][i]; |
| ;step1[17] = step1b[17][i] + step1b[18][i]; |
| ;step1[18] = step1b[17][i] - step1b[18][i]; |
| ;step1[29] = step1b[30][i] - step1b[29][i]; |
| ;step1[30] = step1b[30][i] + step1b[29][i]; |
| ;step1[31] = step1b[31][i] + step1b[28][i]; |
| vadd.s16 q8, q4, q2 |
| vadd.s16 q9, q5, q0 |
| vadd.s16 q10, q7, q1 |
| vadd.s16 q15, q6, q3 |
| vsub.s16 q13, q5, q0 |
| vsub.s16 q14, q7, q1 |
| STORE_IN_OUTPUT 0, 16, 31, q8, q15 |
| STORE_IN_OUTPUT 31, 17, 30, q9, q10 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 5 |
| ;temp1 = step1b[29][i] * cospi_24_64 - step1b[18][i] * cospi_8_64; |
| ;temp2 = step1b[29][i] * cospi_8_64 + step1b[18][i] * cospi_24_64; |
| ;step2[18] = dct_const_round_shift(temp1); |
| ;step2[29] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD cospi_24_64, cospi_8_64, d0, d1, d2, d3 |
| STORE_IN_OUTPUT 30, 29, 18, q1, q0 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 4 |
| ;step1[19] = step1b[16][i] - step1b[19][i]; |
| ;step1[28] = step1b[31][i] - step1b[28][i]; |
| vsub.s16 q13, q4, q2 |
| vsub.s16 q14, q6, q3 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 5 |
| ;temp1 = step1b[28][i] * cospi_24_64 - step1b[19][i] * cospi_8_64; |
| ;temp2 = step1b[28][i] * cospi_8_64 + step1b[19][i] * cospi_24_64; |
| ;step2[19] = dct_const_round_shift(temp1); |
| ;step2[28] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD cospi_24_64, cospi_8_64, d8, d9, d12, d13 |
| STORE_IN_OUTPUT 18, 19, 28, q4, q6 |
| ; -------------------------------------------------------------------------- |
| |
| |
| ; -------------------------------------------------------------------------- |
| ; BLOCK B: 20-23,24-27 |
| ; -------------------------------------------------------------------------- |
| ; generate 20,21,26,27 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 1 |
| ;temp1 = input[5 * 32] * cospi_27_64 - input[27 * 32] * cospi_5_64; |
| ;temp2 = input[5 * 32] * cospi_5_64 + input[27 * 32] * cospi_27_64; |
| ;step1b[20][i] = dct_const_round_shift(temp1); |
| ;step1b[27][i] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 7, 5, 27 |
| DO_BUTTERFLY_STD cospi_27_64, cospi_5_64, d0, d1, d4, d5 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 1 |
| ;temp1 = input[21 * 32] * cospi_11_64 - input[11 * 32] * cospi_21_64; |
| ;temp2 = input[21 * 32] * cospi_21_64 + input[11 * 32] * cospi_11_64; |
| ;step1b[21][i] = dct_const_round_shift(temp1); |
| ;step1b[26][i] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 27, 21, 11 |
| DO_BUTTERFLY_STD cospi_11_64, cospi_21_64, d2, d3, d6, d7 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 2 |
| ;step2[20] = step1b[20][i] + step1b[21][i]; |
| ;step2[21] = step1b[20][i] - step1b[21][i]; |
| ;step2[26] = -step1b[26][i] + step1b[27][i]; |
| ;step2[27] = step1b[26][i] + step1b[27][i]; |
| vsub.s16 q13, q0, q1 |
| vadd.s16 q0, q0, q1 |
| vsub.s16 q14, q2, q3 |
| vadd.s16 q2, q2, q3 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 3 |
| ;temp1 = step1b[26][i] * cospi_12_64 - step1b[21][i] * cospi_20_64; |
| ;temp2 = step1b[26][i] * cospi_20_64 + step1b[21][i] * cospi_12_64; |
| ;step3[21] = dct_const_round_shift(temp1); |
| ;step3[26] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD cospi_12_64, cospi_20_64, d2, d3, d6, d7 |
| ; -------------------------------------------------------------------------- |
| ; generate 22,23,24,25 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 1 |
| ;temp1 = input[13 * 32] * cospi_19_64 - input[19 * 32] * cospi_13_64; |
| ;temp2 = input[13 * 32] * cospi_13_64 + input[19 * 32] * cospi_19_64; |
| ;step1b[22][i] = dct_const_round_shift(temp1); |
| ;step1b[25][i] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 11, 13, 19 |
| DO_BUTTERFLY_STD cospi_19_64, cospi_13_64, d10, d11, d14, d15 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 1 |
| ;temp1 = input[29 * 32] * cospi_3_64 - input[3 * 32] * cospi_29_64; |
| ;temp2 = input[29 * 32] * cospi_29_64 + input[3 * 32] * cospi_3_64; |
| ;step1b[23][i] = dct_const_round_shift(temp1); |
| ;step1b[24][i] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 19, 29, 3 |
| DO_BUTTERFLY_STD cospi_3_64, cospi_29_64, d8, d9, d12, d13 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 2 |
| ;step2[22] = -step1b[22][i] + step1b[23][i]; |
| ;step2[23] = step1b[22][i] + step1b[23][i]; |
| ;step2[24] = step1b[24][i] + step1b[25][i]; |
| ;step2[25] = step1b[24][i] - step1b[25][i]; |
| vsub.s16 q14, q4, q5 |
| vadd.s16 q5, q4, q5 |
| vsub.s16 q13, q6, q7 |
| vadd.s16 q6, q6, q7 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 3 |
| ;temp1 = step1b[22][i] * (-cospi_20_64) - step1b[25][i] * (-cospi_12_64); |
| ;temp2 = step1b[22][i] * (-cospi_12_64) + step1b[25][i] * (-cospi_20_64); |
| ;step3[25] = dct_const_round_shift(temp1); |
| ;step3[22] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD (-cospi_20_64), (-cospi_12_64), d8, d9, d14, d15 |
| ; -------------------------------------------------------------------------- |
| ; combine 20-23,24-27 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 4 |
| ;step1[22] = step1b[22][i] + step1b[21][i]; |
| ;step1[23] = step1b[23][i] + step1b[20][i]; |
| vadd.s16 q10, q7, q1 |
| vadd.s16 q11, q5, q0 |
| ;step1[24] = step1b[24][i] + step1b[27][i]; |
| ;step1[25] = step1b[25][i] + step1b[26][i]; |
| vadd.s16 q12, q6, q2 |
| vadd.s16 q15, q4, q3 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 6 |
| ;step3[16] = step1b[16][i] + step1b[23][i]; |
| ;step3[17] = step1b[17][i] + step1b[22][i]; |
| ;step3[22] = step1b[17][i] - step1b[22][i]; |
| ;step3[23] = step1b[16][i] - step1b[23][i]; |
| LOAD_FROM_OUTPUT 28, 16, 17, q14, q13 |
| vadd.s16 q8, q14, q11 |
| vadd.s16 q9, q13, q10 |
| vsub.s16 q13, q13, q10 |
| vsub.s16 q11, q14, q11 |
| STORE_IN_OUTPUT 17, 17, 16, q9, q8 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 6 |
| ;step3[24] = step1b[31][i] - step1b[24][i]; |
| ;step3[25] = step1b[30][i] - step1b[25][i]; |
| ;step3[30] = step1b[30][i] + step1b[25][i]; |
| ;step3[31] = step1b[31][i] + step1b[24][i]; |
| LOAD_FROM_OUTPUT 16, 30, 31, q14, q9 |
| vsub.s16 q8, q9, q12 |
| vadd.s16 q10, q14, q15 |
| vsub.s16 q14, q14, q15 |
| vadd.s16 q12, q9, q12 |
| STORE_IN_OUTPUT 31, 30, 31, q10, q12 |
| ; -------------------------------------------------------------------------- |
| ; TODO(cd) do some register allocation change to remove these push/pop |
| vpush {q8} ; [24] |
| vpush {q11} ; [23] |
| ; -------------------------------------------------------------------------- |
| ; part of stage 7 |
| ;temp1 = (step1b[25][i] - step1b[22][i]) * cospi_16_64; |
| ;temp2 = (step1b[25][i] + step1b[22][i]) * cospi_16_64; |
| ;step1[22] = dct_const_round_shift(temp1); |
| ;step1[25] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD cospi_16_64, cospi_16_64, d26, d27, d28, d29 |
| STORE_IN_OUTPUT 31, 25, 22, q14, q13 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 7 |
| ;temp1 = (step1b[24][i] - step1b[23][i]) * cospi_16_64; |
| ;temp2 = (step1b[24][i] + step1b[23][i]) * cospi_16_64; |
| ;step1[23] = dct_const_round_shift(temp1); |
| ;step1[24] = dct_const_round_shift(temp2); |
| ; TODO(cd) do some register allocation change to remove these push/pop |
| vpop {q13} ; [23] |
| vpop {q14} ; [24] |
| DO_BUTTERFLY_STD cospi_16_64, cospi_16_64, d26, d27, d28, d29 |
| STORE_IN_OUTPUT 22, 24, 23, q14, q13 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 4 |
| ;step1[20] = step1b[23][i] - step1b[20][i]; |
| ;step1[27] = step1b[24][i] - step1b[27][i]; |
| vsub.s16 q14, q5, q0 |
| vsub.s16 q13, q6, q2 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 5 |
| ;temp1 = step1b[20][i] * (-cospi_8_64) - step1b[27][i] * (-cospi_24_64); |
| ;temp2 = step1b[20][i] * (-cospi_24_64) + step1b[27][i] * (-cospi_8_64); |
| ;step2[27] = dct_const_round_shift(temp1); |
| ;step2[20] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD (-cospi_8_64), (-cospi_24_64), d10, d11, d12, d13 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 4 |
| ;step1[21] = step1b[22][i] - step1b[21][i]; |
| ;step1[26] = step1b[25][i] - step1b[26][i]; |
| vsub.s16 q14, q7, q1 |
| vsub.s16 q13, q4, q3 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 5 |
| ;temp1 = step1b[21][i] * (-cospi_8_64) - step1b[26][i] * (-cospi_24_64); |
| ;temp2 = step1b[21][i] * (-cospi_24_64) + step1b[26][i] * (-cospi_8_64); |
| ;step2[26] = dct_const_round_shift(temp1); |
| ;step2[21] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD (-cospi_8_64), (-cospi_24_64), d0, d1, d2, d3 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 6 |
| ;step3[18] = step1b[18][i] + step1b[21][i]; |
| ;step3[19] = step1b[19][i] + step1b[20][i]; |
| ;step3[20] = step1b[19][i] - step1b[20][i]; |
| ;step3[21] = step1b[18][i] - step1b[21][i]; |
| LOAD_FROM_OUTPUT 23, 18, 19, q14, q13 |
| vadd.s16 q8, q14, q1 |
| vadd.s16 q9, q13, q6 |
| vsub.s16 q13, q13, q6 |
| vsub.s16 q1, q14, q1 |
| STORE_IN_OUTPUT 19, 18, 19, q8, q9 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 6 |
| ;step3[27] = step1b[28][i] - step1b[27][i]; |
| ;step3[28] = step1b[28][i] + step1b[27][i]; |
| ;step3[29] = step1b[29][i] + step1b[26][i]; |
| ;step3[26] = step1b[29][i] - step1b[26][i]; |
| LOAD_FROM_OUTPUT 19, 28, 29, q8, q9 |
| vsub.s16 q14, q8, q5 |
| vadd.s16 q10, q8, q5 |
| vadd.s16 q11, q9, q0 |
| vsub.s16 q0, q9, q0 |
| STORE_IN_OUTPUT 29, 28, 29, q10, q11 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 7 |
| ;temp1 = (step1b[27][i] - step1b[20][i]) * cospi_16_64; |
| ;temp2 = (step1b[27][i] + step1b[20][i]) * cospi_16_64; |
| ;step1[20] = dct_const_round_shift(temp1); |
| ;step1[27] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD cospi_16_64, cospi_16_64, d26, d27, d28, d29 |
| STORE_IN_OUTPUT 29, 20, 27, q13, q14 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 7 |
| ;temp1 = (step1b[26][i] - step1b[21][i]) * cospi_16_64; |
| ;temp2 = (step1b[26][i] + step1b[21][i]) * cospi_16_64; |
| ;step1[21] = dct_const_round_shift(temp1); |
| ;step1[26] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY d0, d1, d2, d3, cospi_16_64, cospi_16_64, d2, d3, d0, d1 |
| STORE_IN_OUTPUT 27, 21, 26, q1, q0 |
| ; -------------------------------------------------------------------------- |
| |
| |
| ; -------------------------------------------------------------------------- |
| ; BLOCK C: 8-10,11-15 |
| ; -------------------------------------------------------------------------- |
| ; generate 8,9,14,15 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 2 |
| ;temp1 = input[2 * 32] * cospi_30_64 - input[30 * 32] * cospi_2_64; |
| ;temp2 = input[2 * 32] * cospi_2_64 + input[30 * 32] * cospi_30_64; |
| ;step2[8] = dct_const_round_shift(temp1); |
| ;step2[15] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 3, 2, 30 |
| DO_BUTTERFLY_STD cospi_30_64, cospi_2_64, d0, d1, d4, d5 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 2 |
| ;temp1 = input[18 * 32] * cospi_14_64 - input[14 * 32] * cospi_18_64; |
| ;temp2 = input[18 * 32] * cospi_18_64 + input[14 * 32] * cospi_14_64; |
| ;step2[9] = dct_const_round_shift(temp1); |
| ;step2[14] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 30, 18, 14 |
| DO_BUTTERFLY_STD cospi_14_64, cospi_18_64, d2, d3, d6, d7 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 3 |
| ;step3[8] = step1b[8][i] + step1b[9][i]; |
| ;step3[9] = step1b[8][i] - step1b[9][i]; |
| ;step3[14] = step1b[15][i] - step1b[14][i]; |
| ;step3[15] = step1b[15][i] + step1b[14][i]; |
| vsub.s16 q13, q0, q1 |
| vadd.s16 q0, q0, q1 |
| vsub.s16 q14, q2, q3 |
| vadd.s16 q2, q2, q3 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 4 |
| ;temp1 = step1b[14][i] * cospi_24_64 - step1b[9][i] * cospi_8_64; |
| ;temp2 = step1b[14][i] * cospi_8_64 + step1b[9][i] * cospi_24_64; |
| ;step1[9] = dct_const_round_shift(temp1); |
| ;step1[14] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD cospi_24_64, cospi_8_64, d2, d3, d6, d7 |
| ; -------------------------------------------------------------------------- |
| ; generate 10,11,12,13 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 2 |
| ;temp1 = input[10 * 32] * cospi_22_64 - input[22 * 32] * cospi_10_64; |
| ;temp2 = input[10 * 32] * cospi_10_64 + input[22 * 32] * cospi_22_64; |
| ;step2[10] = dct_const_round_shift(temp1); |
| ;step2[13] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 14, 10, 22 |
| DO_BUTTERFLY_STD cospi_22_64, cospi_10_64, d10, d11, d14, d15 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 2 |
| ;temp1 = input[26 * 32] * cospi_6_64 - input[6 * 32] * cospi_26_64; |
| ;temp2 = input[26 * 32] * cospi_26_64 + input[6 * 32] * cospi_6_64; |
| ;step2[11] = dct_const_round_shift(temp1); |
| ;step2[12] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 22, 26, 6 |
| DO_BUTTERFLY_STD cospi_6_64, cospi_26_64, d8, d9, d12, d13 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 3 |
| ;step3[10] = step1b[11][i] - step1b[10][i]; |
| ;step3[11] = step1b[11][i] + step1b[10][i]; |
| ;step3[12] = step1b[12][i] + step1b[13][i]; |
| ;step3[13] = step1b[12][i] - step1b[13][i]; |
| vsub.s16 q14, q4, q5 |
| vadd.s16 q5, q4, q5 |
| vsub.s16 q13, q6, q7 |
| vadd.s16 q6, q6, q7 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 4 |
| ;temp1 = step1b[10][i] * (-cospi_8_64) - step1b[13][i] * (-cospi_24_64); |
| ;temp2 = step1b[10][i] * (-cospi_24_64) + step1b[13][i] * (-cospi_8_64); |
| ;step1[13] = dct_const_round_shift(temp1); |
| ;step1[10] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD (-cospi_8_64), (-cospi_24_64), d8, d9, d14, d15 |
| ; -------------------------------------------------------------------------- |
| ; combine 8-10,11-15 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 5 |
| ;step2[8] = step1b[8][i] + step1b[11][i]; |
| ;step2[9] = step1b[9][i] + step1b[10][i]; |
| ;step2[10] = step1b[9][i] - step1b[10][i]; |
| vadd.s16 q8, q0, q5 |
| vadd.s16 q9, q1, q7 |
| vsub.s16 q13, q1, q7 |
| ;step2[13] = step1b[14][i] - step1b[13][i]; |
| ;step2[14] = step1b[14][i] + step1b[13][i]; |
| ;step2[15] = step1b[15][i] + step1b[12][i]; |
| vsub.s16 q14, q3, q4 |
| vadd.s16 q10, q3, q4 |
| vadd.s16 q15, q2, q6 |
| STORE_IN_OUTPUT 26, 8, 15, q8, q15 |
| STORE_IN_OUTPUT 15, 9, 14, q9, q10 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 6 |
| ;temp1 = (step1b[13][i] - step1b[10][i]) * cospi_16_64; |
| ;temp2 = (step1b[13][i] + step1b[10][i]) * cospi_16_64; |
| ;step3[10] = dct_const_round_shift(temp1); |
| ;step3[13] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD cospi_16_64, cospi_16_64, d2, d3, d6, d7 |
| STORE_IN_OUTPUT 14, 13, 10, q3, q1 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 5 |
| ;step2[11] = step1b[8][i] - step1b[11][i]; |
| ;step2[12] = step1b[15][i] - step1b[12][i]; |
| vsub.s16 q13, q0, q5 |
| vsub.s16 q14, q2, q6 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 6 |
| ;temp1 = (step1b[12][i] - step1b[11][i]) * cospi_16_64; |
| ;temp2 = (step1b[12][i] + step1b[11][i]) * cospi_16_64; |
| ;step3[11] = dct_const_round_shift(temp1); |
| ;step3[12] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD cospi_16_64, cospi_16_64, d2, d3, d6, d7 |
| STORE_IN_OUTPUT 10, 11, 12, q1, q3 |
| ; -------------------------------------------------------------------------- |
| |
| |
| ; -------------------------------------------------------------------------- |
| ; BLOCK D: 0-3,4-7 |
| ; -------------------------------------------------------------------------- |
| ; generate 4,5,6,7 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 3 |
| ;temp1 = input[4 * 32] * cospi_28_64 - input[28 * 32] * cospi_4_64; |
| ;temp2 = input[4 * 32] * cospi_4_64 + input[28 * 32] * cospi_28_64; |
| ;step3[4] = dct_const_round_shift(temp1); |
| ;step3[7] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 6, 4, 28 |
| DO_BUTTERFLY_STD cospi_28_64, cospi_4_64, d0, d1, d4, d5 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 3 |
| ;temp1 = input[20 * 32] * cospi_12_64 - input[12 * 32] * cospi_20_64; |
| ;temp2 = input[20 * 32] * cospi_20_64 + input[12 * 32] * cospi_12_64; |
| ;step3[5] = dct_const_round_shift(temp1); |
| ;step3[6] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 28, 20, 12 |
| DO_BUTTERFLY_STD cospi_12_64, cospi_20_64, d2, d3, d6, d7 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 4 |
| ;step1[4] = step1b[4][i] + step1b[5][i]; |
| ;step1[5] = step1b[4][i] - step1b[5][i]; |
| ;step1[6] = step1b[7][i] - step1b[6][i]; |
| ;step1[7] = step1b[7][i] + step1b[6][i]; |
| vsub.s16 q13, q0, q1 |
| vadd.s16 q0, q0, q1 |
| vsub.s16 q14, q2, q3 |
| vadd.s16 q2, q2, q3 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 5 |
| ;temp1 = (step1b[6][i] - step1b[5][i]) * cospi_16_64; |
| ;temp2 = (step1b[5][i] + step1b[6][i]) * cospi_16_64; |
| ;step2[5] = dct_const_round_shift(temp1); |
| ;step2[6] = dct_const_round_shift(temp2); |
| DO_BUTTERFLY_STD cospi_16_64, cospi_16_64, d2, d3, d6, d7 |
| ; -------------------------------------------------------------------------- |
| ; generate 0,1,2,3 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 4 |
| ;temp1 = (input[0 * 32] - input[16 * 32]) * cospi_16_64; |
| ;temp2 = (input[0 * 32] + input[16 * 32]) * cospi_16_64; |
| ;step1[1] = dct_const_round_shift(temp1); |
| ;step1[0] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 12, 0, 16 |
| DO_BUTTERFLY_STD cospi_16_64, cospi_16_64, d10, d11, d14, d15 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 4 |
| ;temp1 = input[8 * 32] * cospi_24_64 - input[24 * 32] * cospi_8_64; |
| ;temp2 = input[8 * 32] * cospi_8_64 + input[24 * 32] * cospi_24_64; |
| ;step1[2] = dct_const_round_shift(temp1); |
| ;step1[3] = dct_const_round_shift(temp2); |
| LOAD_FROM_TRANSPOSED 16, 8, 24 |
| DO_BUTTERFLY_STD cospi_24_64, cospi_8_64, d28, d29, d12, d13 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 5 |
| ;step2[0] = step1b[0][i] + step1b[3][i]; |
| ;step2[1] = step1b[1][i] + step1b[2][i]; |
| ;step2[2] = step1b[1][i] - step1b[2][i]; |
| ;step2[3] = step1b[0][i] - step1b[3][i]; |
| vadd.s16 q4, q7, q6 |
| vsub.s16 q7, q7, q6 |
| vsub.s16 q6, q5, q14 |
| vadd.s16 q5, q5, q14 |
| ; -------------------------------------------------------------------------- |
| ; combine 0-3,4-7 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 6 |
| ;step3[0] = step1b[0][i] + step1b[7][i]; |
| ;step3[1] = step1b[1][i] + step1b[6][i]; |
| ;step3[2] = step1b[2][i] + step1b[5][i]; |
| ;step3[3] = step1b[3][i] + step1b[4][i]; |
| vadd.s16 q8, q4, q2 |
| vadd.s16 q9, q5, q3 |
| vadd.s16 q10, q6, q1 |
| vadd.s16 q11, q7, q0 |
| ;step3[4] = step1b[3][i] - step1b[4][i]; |
| ;step3[5] = step1b[2][i] - step1b[5][i]; |
| ;step3[6] = step1b[1][i] - step1b[6][i]; |
| ;step3[7] = step1b[0][i] - step1b[7][i]; |
| vsub.s16 q12, q7, q0 |
| vsub.s16 q13, q6, q1 |
| vsub.s16 q14, q5, q3 |
| vsub.s16 q15, q4, q2 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 7 |
| ;step1[0] = step1b[0][i] + step1b[15][i]; |
| ;step1[1] = step1b[1][i] + step1b[14][i]; |
| ;step1[14] = step1b[1][i] - step1b[14][i]; |
| ;step1[15] = step1b[0][i] - step1b[15][i]; |
| LOAD_FROM_OUTPUT 12, 14, 15, q0, q1 |
| vadd.s16 q2, q8, q1 |
| vadd.s16 q3, q9, q0 |
| vsub.s16 q4, q9, q0 |
| vsub.s16 q5, q8, q1 |
| ; -------------------------------------------------------------------------- |
| ; part of final stage |
| ;output[14 * 32] = step1b[14][i] + step1b[17][i]; |
| ;output[15 * 32] = step1b[15][i] + step1b[16][i]; |
| ;output[16 * 32] = step1b[15][i] - step1b[16][i]; |
| ;output[17 * 32] = step1b[14][i] - step1b[17][i]; |
| LOAD_FROM_OUTPUT 15, 16, 17, q0, q1 |
| vadd.s16 q8, q4, q1 |
| vadd.s16 q9, q5, q0 |
| vsub.s16 q6, q5, q0 |
| vsub.s16 q7, q4, q1 |
| STORE_IN_OUTPUT 17, 17, 16, q7, q6 |
| STORE_IN_OUTPUT 16, 15, 14, q9, q8 |
| ; -------------------------------------------------------------------------- |
| ; part of final stage |
| ;output[ 0 * 32] = step1b[0][i] + step1b[31][i]; |
| ;output[ 1 * 32] = step1b[1][i] + step1b[30][i]; |
| ;output[30 * 32] = step1b[1][i] - step1b[30][i]; |
| ;output[31 * 32] = step1b[0][i] - step1b[31][i]; |
| LOAD_FROM_OUTPUT 14, 30, 31, q0, q1 |
| vadd.s16 q4, q2, q1 |
| vadd.s16 q5, q3, q0 |
| vsub.s16 q6, q3, q0 |
| vsub.s16 q7, q2, q1 |
| STORE_IN_OUTPUT 31, 31, 30, q7, q6 |
| STORE_IN_OUTPUT 30, 0, 1, q4, q5 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 7 |
| ;step1[2] = step1b[2][i] + step1b[13][i]; |
| ;step1[3] = step1b[3][i] + step1b[12][i]; |
| ;step1[12] = step1b[3][i] - step1b[12][i]; |
| ;step1[13] = step1b[2][i] - step1b[13][i]; |
| LOAD_FROM_OUTPUT 1, 12, 13, q0, q1 |
| vadd.s16 q2, q10, q1 |
| vadd.s16 q3, q11, q0 |
| vsub.s16 q4, q11, q0 |
| vsub.s16 q5, q10, q1 |
| ; -------------------------------------------------------------------------- |
| ; part of final stage |
| ;output[12 * 32] = step1b[12][i] + step1b[19][i]; |
| ;output[13 * 32] = step1b[13][i] + step1b[18][i]; |
| ;output[18 * 32] = step1b[13][i] - step1b[18][i]; |
| ;output[19 * 32] = step1b[12][i] - step1b[19][i]; |
| LOAD_FROM_OUTPUT 13, 18, 19, q0, q1 |
| vadd.s16 q6, q4, q1 |
| vadd.s16 q7, q5, q0 |
| vsub.s16 q8, q5, q0 |
| vsub.s16 q9, q4, q1 |
| STORE_IN_OUTPUT 19, 19, 18, q9, q8 |
| STORE_IN_OUTPUT 18, 13, 12, q7, q6 |
| ; -------------------------------------------------------------------------- |
| ; part of final stage |
| ;output[ 2 * 32] = step1b[2][i] + step1b[29][i]; |
| ;output[ 3 * 32] = step1b[3][i] + step1b[28][i]; |
| ;output[28 * 32] = step1b[3][i] - step1b[28][i]; |
| ;output[29 * 32] = step1b[2][i] - step1b[29][i]; |
| LOAD_FROM_OUTPUT 12, 28, 29, q0, q1 |
| vadd.s16 q4, q2, q1 |
| vadd.s16 q5, q3, q0 |
| vsub.s16 q6, q3, q0 |
| vsub.s16 q7, q2, q1 |
| STORE_IN_OUTPUT 29, 29, 28, q7, q6 |
| STORE_IN_OUTPUT 28, 2, 3, q4, q5 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 7 |
| ;step1[4] = step1b[4][i] + step1b[11][i]; |
| ;step1[5] = step1b[5][i] + step1b[10][i]; |
| ;step1[10] = step1b[5][i] - step1b[10][i]; |
| ;step1[11] = step1b[4][i] - step1b[11][i]; |
| LOAD_FROM_OUTPUT 3, 10, 11, q0, q1 |
| vadd.s16 q2, q12, q1 |
| vadd.s16 q3, q13, q0 |
| vsub.s16 q4, q13, q0 |
| vsub.s16 q5, q12, q1 |
| ; -------------------------------------------------------------------------- |
| ; part of final stage |
| ;output[10 * 32] = step1b[10][i] + step1b[21][i]; |
| ;output[11 * 32] = step1b[11][i] + step1b[20][i]; |
| ;output[20 * 32] = step1b[11][i] - step1b[20][i]; |
| ;output[21 * 32] = step1b[10][i] - step1b[21][i]; |
| LOAD_FROM_OUTPUT 11, 20, 21, q0, q1 |
| vadd.s16 q6, q4, q1 |
| vadd.s16 q7, q5, q0 |
| vsub.s16 q8, q5, q0 |
| vsub.s16 q9, q4, q1 |
| STORE_IN_OUTPUT 21, 21, 20, q9, q8 |
| STORE_IN_OUTPUT 20, 11, 10, q7, q6 |
| ; -------------------------------------------------------------------------- |
| ; part of final stage |
| ;output[ 4 * 32] = step1b[4][i] + step1b[27][i]; |
| ;output[ 5 * 32] = step1b[5][i] + step1b[26][i]; |
| ;output[26 * 32] = step1b[5][i] - step1b[26][i]; |
| ;output[27 * 32] = step1b[4][i] - step1b[27][i]; |
| LOAD_FROM_OUTPUT 10, 26, 27, q0, q1 |
| vadd.s16 q4, q2, q1 |
| vadd.s16 q5, q3, q0 |
| vsub.s16 q6, q3, q0 |
| vsub.s16 q7, q2, q1 |
| STORE_IN_OUTPUT 27, 27, 26, q7, q6 |
| STORE_IN_OUTPUT 26, 4, 5, q4, q5 |
| ; -------------------------------------------------------------------------- |
| ; part of stage 7 |
| ;step1[6] = step1b[6][i] + step1b[9][i]; |
| ;step1[7] = step1b[7][i] + step1b[8][i]; |
| ;step1[8] = step1b[7][i] - step1b[8][i]; |
| ;step1[9] = step1b[6][i] - step1b[9][i]; |
| LOAD_FROM_OUTPUT 5, 8, 9, q0, q1 |
| vadd.s16 q2, q14, q1 |
| vadd.s16 q3, q15, q0 |
| vsub.s16 q4, q15, q0 |
| vsub.s16 q5, q14, q1 |
| ; -------------------------------------------------------------------------- |
| ; part of final stage |
| ;output[ 8 * 32] = step1b[8][i] + step1b[23][i]; |
| ;output[ 9 * 32] = step1b[9][i] + step1b[22][i]; |
| ;output[22 * 32] = step1b[9][i] - step1b[22][i]; |
| ;output[23 * 32] = step1b[8][i] - step1b[23][i]; |
| LOAD_FROM_OUTPUT 9, 22, 23, q0, q1 |
| vadd.s16 q6, q4, q1 |
| vadd.s16 q7, q5, q0 |
| vsub.s16 q8, q5, q0 |
| vsub.s16 q9, q4, q1 |
| STORE_IN_OUTPUT 23, 23, 22, q9, q8 |
| STORE_IN_OUTPUT 22, 9, 8, q7, q6 |
| ; -------------------------------------------------------------------------- |
| ; part of final stage |
| ;output[ 6 * 32] = step1b[6][i] + step1b[25][i]; |
| ;output[ 7 * 32] = step1b[7][i] + step1b[24][i]; |
| ;output[24 * 32] = step1b[7][i] - step1b[24][i]; |
| ;output[25 * 32] = step1b[6][i] - step1b[25][i]; |
| LOAD_FROM_OUTPUT 8, 24, 25, q0, q1 |
| vadd.s16 q4, q2, q1 |
| vadd.s16 q5, q3, q0 |
| vsub.s16 q6, q3, q0 |
| vsub.s16 q7, q2, q1 |
| STORE_IN_OUTPUT 25, 25, 24, q7, q6 |
| STORE_IN_OUTPUT 24, 6, 7, q4, q5 |
| ; -------------------------------------------------------------------------- |
| |
| ; TODO(cd) get rid of these push/pop by properly adjusting register |
| ; content at end of loop |
| pop {r2} |
| pop {r1} |
| pop {r0} |
| add r1, r1, #8*2 |
| add r2, r2, #8*32*2 |
| |
| ; bands loop processing |
| add r4, r4, #1 |
| cmp r4, #3 |
| ble idct32_bands_loop |
| |
| pop {r4} |
| bx lr |
| ENDP ; |idct32_transpose_and_transform| |
| |
| ;void idct32_combine_add(uint8_t *dest, int16_t *out, int dest_stride); |
| ; |
| ; r0 uint8_t *dest |
| ; r1 int16_t *out |
| ; r2 int dest_stride) |
| |
| |idct32_combine_add| PROC |
| |
| mov r12, r0 ; dest pointer used for stores |
| sub r2, r2, #32 ; adjust the stride (remove the post-increments) |
| mov r3, #0 ; initialize loop counter |
| |
| idct32_combine_add_loop |
| ; load out[j * 32 + 0-31] |
| vld1.s16 {q12}, [r1]! |
| vld1.s16 {q13}, [r1]! |
| vld1.s16 {q14}, [r1]! |
| vld1.s16 {q15}, [r1]! |
| ; load dest[j * dest_stride + 0-31] |
| vld1.s16 {q6}, [r0]! |
| vld1.s16 {q7}, [r0]! |
| ; ROUND_POWER_OF_TWO |
| vrshr.s16 q12, q12, #6 |
| vrshr.s16 q13, q13, #6 |
| vrshr.s16 q14, q14, #6 |
| vrshr.s16 q15, q15, #6 |
| ; add to dest[j * dest_stride + 0-31] |
| vaddw.u8 q12, q12, d12 |
| vaddw.u8 q13, q13, d13 |
| vaddw.u8 q14, q14, d14 |
| vaddw.u8 q15, q15, d15 |
| ; clip pixel |
| vqmovun.s16 d12, q12 |
| vqmovun.s16 d13, q13 |
| vqmovun.s16 d14, q14 |
| vqmovun.s16 d15, q15 |
| ; store back into dest[j * dest_stride + 0-31] |
| vst1.16 {q6}, [r12]! |
| vst1.16 {q7}, [r12]! |
| ; increment pointers by adjusted stride (not necessary for r1/out) |
| add r0, r0, r2 |
| add r12, r12, r2 |
| ; loop processing |
| add r3, r3, #1 |
| cmp r3, #31 |
| ble idct32_combine_add_loop |
| |
| bx lr |
| ENDP ; |idct32_transpose| |
| |
| END |
