| ; |
| ; 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. |
| ; |
| |
| EXPORT |vpx_idct8x8_64_add_neon| |
| EXPORT |vpx_idct8x8_12_add_neon| |
| ARM |
| REQUIRE8 |
| PRESERVE8 |
| |
| AREA ||.text||, CODE, READONLY, ALIGN=2 |
| |
| ; Parallel 1D IDCT on all the columns of a 8x8 16bit data matrix which are |
| ; loaded in q8-q15. The output will be stored back into q8-q15 registers. |
| ; This macro will touch q0-q7 registers and use them as buffer during |
| ; calculation. |
| MACRO |
| IDCT8x8_1D |
| ; stage 1 |
| vdup.16 d0, r3 ; duplicate cospi_28_64 |
| vdup.16 d1, r4 ; duplicate cospi_4_64 |
| vdup.16 d2, r5 ; duplicate cospi_12_64 |
| vdup.16 d3, r6 ; duplicate cospi_20_64 |
| |
| ; input[1] * cospi_28_64 |
| vmull.s16 q2, d18, d0 |
| vmull.s16 q3, d19, d0 |
| |
| ; input[5] * cospi_12_64 |
| vmull.s16 q5, d26, d2 |
| vmull.s16 q6, d27, d2 |
| |
| ; input[1]*cospi_28_64-input[7]*cospi_4_64 |
| vmlsl.s16 q2, d30, d1 |
| vmlsl.s16 q3, d31, d1 |
| |
| ; input[5] * cospi_12_64 - input[3] * cospi_20_64 |
| vmlsl.s16 q5, d22, d3 |
| vmlsl.s16 q6, d23, d3 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d8, q2, #14 ; >> 14 |
| vqrshrn.s32 d9, q3, #14 ; >> 14 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d10, q5, #14 ; >> 14 |
| vqrshrn.s32 d11, q6, #14 ; >> 14 |
| |
| ; input[1] * cospi_4_64 |
| vmull.s16 q2, d18, d1 |
| vmull.s16 q3, d19, d1 |
| |
| ; input[5] * cospi_20_64 |
| vmull.s16 q9, d26, d3 |
| vmull.s16 q13, d27, d3 |
| |
| ; input[1]*cospi_4_64+input[7]*cospi_28_64 |
| vmlal.s16 q2, d30, d0 |
| vmlal.s16 q3, d31, d0 |
| |
| ; input[5] * cospi_20_64 + input[3] * cospi_12_64 |
| vmlal.s16 q9, d22, d2 |
| vmlal.s16 q13, d23, d2 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d14, q2, #14 ; >> 14 |
| vqrshrn.s32 d15, q3, #14 ; >> 14 |
| |
| ; stage 2 & stage 3 - even half |
| vdup.16 d0, r7 ; duplicate cospi_16_64 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d12, q9, #14 ; >> 14 |
| vqrshrn.s32 d13, q13, #14 ; >> 14 |
| |
| ; input[0] * cospi_16_64 |
| vmull.s16 q2, d16, d0 |
| vmull.s16 q3, d17, d0 |
| |
| ; input[0] * cospi_16_64 |
| vmull.s16 q13, d16, d0 |
| vmull.s16 q15, d17, d0 |
| |
| ; (input[0] + input[2]) * cospi_16_64 |
| vmlal.s16 q2, d24, d0 |
| vmlal.s16 q3, d25, d0 |
| |
| ; (input[0] - input[2]) * cospi_16_64 |
| vmlsl.s16 q13, d24, d0 |
| vmlsl.s16 q15, d25, d0 |
| |
| vdup.16 d0, r8 ; duplicate cospi_24_64 |
| vdup.16 d1, r9 ; duplicate cospi_8_64 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d18, q2, #14 ; >> 14 |
| vqrshrn.s32 d19, q3, #14 ; >> 14 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d22, q13, #14 ; >> 14 |
| vqrshrn.s32 d23, q15, #14 ; >> 14 |
| |
| ; input[1] * cospi_24_64 - input[3] * cospi_8_64 |
| ; input[1] * cospi_24_64 |
| vmull.s16 q2, d20, d0 |
| vmull.s16 q3, d21, d0 |
| |
| ; input[1] * cospi_8_64 |
| vmull.s16 q8, d20, d1 |
| vmull.s16 q12, d21, d1 |
| |
| ; input[1] * cospi_24_64 - input[3] * cospi_8_64 |
| vmlsl.s16 q2, d28, d1 |
| vmlsl.s16 q3, d29, d1 |
| |
| ; input[1] * cospi_8_64 + input[3] * cospi_24_64 |
| vmlal.s16 q8, d28, d0 |
| vmlal.s16 q12, d29, d0 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d26, q2, #14 ; >> 14 |
| vqrshrn.s32 d27, q3, #14 ; >> 14 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d30, q8, #14 ; >> 14 |
| vqrshrn.s32 d31, q12, #14 ; >> 14 |
| |
| vadd.s16 q0, q9, q15 ; output[0] = step[0] + step[3] |
| vadd.s16 q1, q11, q13 ; output[1] = step[1] + step[2] |
| vsub.s16 q2, q11, q13 ; output[2] = step[1] - step[2] |
| vsub.s16 q3, q9, q15 ; output[3] = step[0] - step[3] |
| |
| ; stage 3 -odd half |
| vdup.16 d16, r7 ; duplicate cospi_16_64 |
| |
| ; stage 2 - odd half |
| vsub.s16 q13, q4, q5 ; step2[5] = step1[4] - step1[5] |
| vadd.s16 q4, q4, q5 ; step2[4] = step1[4] + step1[5] |
| vsub.s16 q14, q7, q6 ; step2[6] = -step1[6] + step1[7] |
| vadd.s16 q7, q7, q6 ; step2[7] = step1[6] + step1[7] |
| |
| ; step2[6] * cospi_16_64 |
| vmull.s16 q9, d28, d16 |
| vmull.s16 q10, d29, d16 |
| |
| ; step2[6] * cospi_16_64 |
| vmull.s16 q11, d28, d16 |
| vmull.s16 q12, d29, d16 |
| |
| ; (step2[6] - step2[5]) * cospi_16_64 |
| vmlsl.s16 q9, d26, d16 |
| vmlsl.s16 q10, d27, d16 |
| |
| ; (step2[5] + step2[6]) * cospi_16_64 |
| vmlal.s16 q11, d26, d16 |
| vmlal.s16 q12, d27, d16 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d10, q9, #14 ; >> 14 |
| vqrshrn.s32 d11, q10, #14 ; >> 14 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d12, q11, #14 ; >> 14 |
| vqrshrn.s32 d13, q12, #14 ; >> 14 |
| |
| ; stage 4 |
| vadd.s16 q8, q0, q7 ; output[0] = step1[0] + step1[7]; |
| vadd.s16 q9, q1, q6 ; output[1] = step1[1] + step1[6]; |
| vadd.s16 q10, q2, q5 ; output[2] = step1[2] + step1[5]; |
| vadd.s16 q11, q3, q4 ; output[3] = step1[3] + step1[4]; |
| vsub.s16 q12, q3, q4 ; output[4] = step1[3] - step1[4]; |
| vsub.s16 q13, q2, q5 ; output[5] = step1[2] - step1[5]; |
| vsub.s16 q14, q1, q6 ; output[6] = step1[1] - step1[6]; |
| vsub.s16 q15, q0, q7 ; output[7] = step1[0] - step1[7]; |
| MEND |
| |
| ; Transpose a 8x8 16bit data matrix. Datas are loaded in q8-q15. |
| MACRO |
| TRANSPOSE8X8 |
| vswp d17, d24 |
| vswp d23, d30 |
| vswp d21, d28 |
| vswp d19, d26 |
| vtrn.32 q8, q10 |
| vtrn.32 q9, q11 |
| vtrn.32 q12, q14 |
| vtrn.32 q13, q15 |
| vtrn.16 q8, q9 |
| vtrn.16 q10, q11 |
| vtrn.16 q12, q13 |
| vtrn.16 q14, q15 |
| MEND |
| |
| AREA Block, CODE, READONLY ; name this block of code |
| ;void vpx_idct8x8_64_add_neon(int16_t *input, uint8_t *dest, int dest_stride) |
| ; |
| ; r0 int16_t input |
| ; r1 uint8_t *dest |
| ; r2 int dest_stride) |
| |
| |vpx_idct8x8_64_add_neon| PROC |
| push {r4-r9} |
| vpush {d8-d15} |
| vld1.s16 {q8,q9}, [r0]! |
| vld1.s16 {q10,q11}, [r0]! |
| vld1.s16 {q12,q13}, [r0]! |
| vld1.s16 {q14,q15}, [r0]! |
| |
| ; transpose the input data |
| TRANSPOSE8X8 |
| |
| ; generate cospi_28_64 = 3196 |
| mov r3, #0x0c00 |
| add r3, #0x7c |
| |
| ; generate cospi_4_64 = 16069 |
| mov r4, #0x3e00 |
| add r4, #0xc5 |
| |
| ; generate cospi_12_64 = 13623 |
| mov r5, #0x3500 |
| add r5, #0x37 |
| |
| ; generate cospi_20_64 = 9102 |
| mov r6, #0x2300 |
| add r6, #0x8e |
| |
| ; generate cospi_16_64 = 11585 |
| mov r7, #0x2d00 |
| add r7, #0x41 |
| |
| ; generate cospi_24_64 = 6270 |
| mov r8, #0x1800 |
| add r8, #0x7e |
| |
| ; generate cospi_8_64 = 15137 |
| mov r9, #0x3b00 |
| add r9, #0x21 |
| |
| ; First transform rows |
| IDCT8x8_1D |
| |
| ; Transpose the matrix |
| TRANSPOSE8X8 |
| |
| ; Then transform columns |
| IDCT8x8_1D |
| |
| ; ROUND_POWER_OF_TWO(temp_out[j], 5) |
| vrshr.s16 q8, q8, #5 |
| vrshr.s16 q9, q9, #5 |
| vrshr.s16 q10, q10, #5 |
| vrshr.s16 q11, q11, #5 |
| vrshr.s16 q12, q12, #5 |
| vrshr.s16 q13, q13, #5 |
| vrshr.s16 q14, q14, #5 |
| vrshr.s16 q15, q15, #5 |
| |
| ; save dest pointer |
| mov r0, r1 |
| |
| ; load destination data |
| vld1.64 {d0}, [r1], r2 |
| vld1.64 {d1}, [r1], r2 |
| vld1.64 {d2}, [r1], r2 |
| vld1.64 {d3}, [r1], r2 |
| vld1.64 {d4}, [r1], r2 |
| vld1.64 {d5}, [r1], r2 |
| vld1.64 {d6}, [r1], r2 |
| vld1.64 {d7}, [r1] |
| |
| ; ROUND_POWER_OF_TWO(temp_out[j], 5) + dest[j * dest_stride + i] |
| vaddw.u8 q8, q8, d0 |
| vaddw.u8 q9, q9, d1 |
| vaddw.u8 q10, q10, d2 |
| vaddw.u8 q11, q11, d3 |
| vaddw.u8 q12, q12, d4 |
| vaddw.u8 q13, q13, d5 |
| vaddw.u8 q14, q14, d6 |
| vaddw.u8 q15, q15, d7 |
| |
| ; clip_pixel |
| vqmovun.s16 d0, q8 |
| vqmovun.s16 d1, q9 |
| vqmovun.s16 d2, q10 |
| vqmovun.s16 d3, q11 |
| vqmovun.s16 d4, q12 |
| vqmovun.s16 d5, q13 |
| vqmovun.s16 d6, q14 |
| vqmovun.s16 d7, q15 |
| |
| ; store the data |
| vst1.64 {d0}, [r0], r2 |
| vst1.64 {d1}, [r0], r2 |
| vst1.64 {d2}, [r0], r2 |
| vst1.64 {d3}, [r0], r2 |
| vst1.64 {d4}, [r0], r2 |
| vst1.64 {d5}, [r0], r2 |
| vst1.64 {d6}, [r0], r2 |
| vst1.64 {d7}, [r0], r2 |
| |
| vpop {d8-d15} |
| pop {r4-r9} |
| bx lr |
| ENDP ; |vpx_idct8x8_64_add_neon| |
| |
| ;void vpx_idct8x8_12_add_neon(int16_t *input, uint8_t *dest, int dest_stride) |
| ; |
| ; r0 int16_t input |
| ; r1 uint8_t *dest |
| ; r2 int dest_stride) |
| |
| |vpx_idct8x8_12_add_neon| PROC |
| push {r4-r9} |
| vpush {d8-d15} |
| vld1.s16 {q8,q9}, [r0]! |
| vld1.s16 {q10,q11}, [r0]! |
| vld1.s16 {q12,q13}, [r0]! |
| vld1.s16 {q14,q15}, [r0]! |
| |
| ; transpose the input data |
| TRANSPOSE8X8 |
| |
| ; generate cospi_28_64 = 3196 |
| mov r3, #0x0c00 |
| add r3, #0x7c |
| |
| ; generate cospi_4_64 = 16069 |
| mov r4, #0x3e00 |
| add r4, #0xc5 |
| |
| ; generate cospi_12_64 = 13623 |
| mov r5, #0x3500 |
| add r5, #0x37 |
| |
| ; generate cospi_20_64 = 9102 |
| mov r6, #0x2300 |
| add r6, #0x8e |
| |
| ; generate cospi_16_64 = 11585 |
| mov r7, #0x2d00 |
| add r7, #0x41 |
| |
| ; generate cospi_24_64 = 6270 |
| mov r8, #0x1800 |
| add r8, #0x7e |
| |
| ; generate cospi_8_64 = 15137 |
| mov r9, #0x3b00 |
| add r9, #0x21 |
| |
| ; First transform rows |
| ; stage 1 |
| ; The following instructions use vqrdmulh to do the |
| ; dct_const_round_shift(input[1] * cospi_28_64). vqrdmulh will do doubling |
| ; multiply and shift the result by 16 bits instead of 14 bits. So we need |
| ; to double the constants before multiplying to compensate this. |
| mov r12, r3, lsl #1 |
| vdup.16 q0, r12 ; duplicate cospi_28_64*2 |
| mov r12, r4, lsl #1 |
| vdup.16 q1, r12 ; duplicate cospi_4_64*2 |
| |
| ; dct_const_round_shift(input[1] * cospi_28_64) |
| vqrdmulh.s16 q4, q9, q0 |
| |
| mov r12, r6, lsl #1 |
| rsb r12, #0 |
| vdup.16 q0, r12 ; duplicate -cospi_20_64*2 |
| |
| ; dct_const_round_shift(input[1] * cospi_4_64) |
| vqrdmulh.s16 q7, q9, q1 |
| |
| mov r12, r5, lsl #1 |
| vdup.16 q1, r12 ; duplicate cospi_12_64*2 |
| |
| ; dct_const_round_shift(- input[3] * cospi_20_64) |
| vqrdmulh.s16 q5, q11, q0 |
| |
| mov r12, r7, lsl #1 |
| vdup.16 q0, r12 ; duplicate cospi_16_64*2 |
| |
| ; dct_const_round_shift(input[3] * cospi_12_64) |
| vqrdmulh.s16 q6, q11, q1 |
| |
| ; stage 2 & stage 3 - even half |
| mov r12, r8, lsl #1 |
| vdup.16 q1, r12 ; duplicate cospi_24_64*2 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrdmulh.s16 q9, q8, q0 |
| |
| mov r12, r9, lsl #1 |
| vdup.16 q0, r12 ; duplicate cospi_8_64*2 |
| |
| ; dct_const_round_shift(input[1] * cospi_24_64) |
| vqrdmulh.s16 q13, q10, q1 |
| |
| ; dct_const_round_shift(input[1] * cospi_8_64) |
| vqrdmulh.s16 q15, q10, q0 |
| |
| ; stage 3 -odd half |
| vdup.16 d16, r7 ; duplicate cospi_16_64 |
| |
| vadd.s16 q0, q9, q15 ; output[0] = step[0] + step[3] |
| vadd.s16 q1, q9, q13 ; output[1] = step[1] + step[2] |
| vsub.s16 q2, q9, q13 ; output[2] = step[1] - step[2] |
| vsub.s16 q3, q9, q15 ; output[3] = step[0] - step[3] |
| |
| ; stage 2 - odd half |
| vsub.s16 q13, q4, q5 ; step2[5] = step1[4] - step1[5] |
| vadd.s16 q4, q4, q5 ; step2[4] = step1[4] + step1[5] |
| vsub.s16 q14, q7, q6 ; step2[6] = -step1[6] + step1[7] |
| vadd.s16 q7, q7, q6 ; step2[7] = step1[6] + step1[7] |
| |
| ; step2[6] * cospi_16_64 |
| vmull.s16 q9, d28, d16 |
| vmull.s16 q10, d29, d16 |
| |
| ; step2[6] * cospi_16_64 |
| vmull.s16 q11, d28, d16 |
| vmull.s16 q12, d29, d16 |
| |
| ; (step2[6] - step2[5]) * cospi_16_64 |
| vmlsl.s16 q9, d26, d16 |
| vmlsl.s16 q10, d27, d16 |
| |
| ; (step2[5] + step2[6]) * cospi_16_64 |
| vmlal.s16 q11, d26, d16 |
| vmlal.s16 q12, d27, d16 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d10, q9, #14 ; >> 14 |
| vqrshrn.s32 d11, q10, #14 ; >> 14 |
| |
| ; dct_const_round_shift(input_dc * cospi_16_64) |
| vqrshrn.s32 d12, q11, #14 ; >> 14 |
| vqrshrn.s32 d13, q12, #14 ; >> 14 |
| |
| ; stage 4 |
| vadd.s16 q8, q0, q7 ; output[0] = step1[0] + step1[7]; |
| vadd.s16 q9, q1, q6 ; output[1] = step1[1] + step1[6]; |
| vadd.s16 q10, q2, q5 ; output[2] = step1[2] + step1[5]; |
| vadd.s16 q11, q3, q4 ; output[3] = step1[3] + step1[4]; |
| vsub.s16 q12, q3, q4 ; output[4] = step1[3] - step1[4]; |
| vsub.s16 q13, q2, q5 ; output[5] = step1[2] - step1[5]; |
| vsub.s16 q14, q1, q6 ; output[6] = step1[1] - step1[6]; |
| vsub.s16 q15, q0, q7 ; output[7] = step1[0] - step1[7]; |
| |
| ; Transpose the matrix |
| TRANSPOSE8X8 |
| |
| ; Then transform columns |
| IDCT8x8_1D |
| |
| ; ROUND_POWER_OF_TWO(temp_out[j], 5) |
| vrshr.s16 q8, q8, #5 |
| vrshr.s16 q9, q9, #5 |
| vrshr.s16 q10, q10, #5 |
| vrshr.s16 q11, q11, #5 |
| vrshr.s16 q12, q12, #5 |
| vrshr.s16 q13, q13, #5 |
| vrshr.s16 q14, q14, #5 |
| vrshr.s16 q15, q15, #5 |
| |
| ; save dest pointer |
| mov r0, r1 |
| |
| ; load destination data |
| vld1.64 {d0}, [r1], r2 |
| vld1.64 {d1}, [r1], r2 |
| vld1.64 {d2}, [r1], r2 |
| vld1.64 {d3}, [r1], r2 |
| vld1.64 {d4}, [r1], r2 |
| vld1.64 {d5}, [r1], r2 |
| vld1.64 {d6}, [r1], r2 |
| vld1.64 {d7}, [r1] |
| |
| ; ROUND_POWER_OF_TWO(temp_out[j], 5) + dest[j * dest_stride + i] |
| vaddw.u8 q8, q8, d0 |
| vaddw.u8 q9, q9, d1 |
| vaddw.u8 q10, q10, d2 |
| vaddw.u8 q11, q11, d3 |
| vaddw.u8 q12, q12, d4 |
| vaddw.u8 q13, q13, d5 |
| vaddw.u8 q14, q14, d6 |
| vaddw.u8 q15, q15, d7 |
| |
| ; clip_pixel |
| vqmovun.s16 d0, q8 |
| vqmovun.s16 d1, q9 |
| vqmovun.s16 d2, q10 |
| vqmovun.s16 d3, q11 |
| vqmovun.s16 d4, q12 |
| vqmovun.s16 d5, q13 |
| vqmovun.s16 d6, q14 |
| vqmovun.s16 d7, q15 |
| |
| ; store the data |
| vst1.64 {d0}, [r0], r2 |
| vst1.64 {d1}, [r0], r2 |
| vst1.64 {d2}, [r0], r2 |
| vst1.64 {d3}, [r0], r2 |
| vst1.64 {d4}, [r0], r2 |
| vst1.64 {d5}, [r0], r2 |
| vst1.64 {d6}, [r0], r2 |
| vst1.64 {d7}, [r0], r2 |
| |
| vpop {d8-d15} |
| pop {r4-r9} |
| bx lr |
| ENDP ; |vpx_idct8x8_12_add_neon| |
| |
| END |
