| /* |
| * Copyright (c) 2016 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 <arm_neon.h> |
| |
| #include "./vpx_dsp_rtcd.h" |
| #include "vpx_dsp/arm/highbd_idct_neon.h" |
| #include "vpx_dsp/arm/idct_neon.h" |
| #include "vpx_dsp/inv_txfm.h" |
| |
| // res is in reverse row order |
| static INLINE void highbd_idct4x4_1_add_kernel2(uint16_t **dest, |
| const int stride, |
| const int16x8_t res, |
| const int16x8_t max) { |
| const uint16x4_t a0 = vld1_u16(*dest); |
| const uint16x4_t a1 = vld1_u16(*dest + stride); |
| const int16x8_t a = vreinterpretq_s16_u16(vcombine_u16(a1, a0)); |
| // Note: In some profile tests, res is quite close to +/-32767. |
| // We use saturating addition. |
| const int16x8_t b = vqaddq_s16(res, a); |
| const int16x8_t c = vminq_s16(b, max); |
| const uint16x8_t d = vqshluq_n_s16(c, 0); |
| vst1_u16(*dest, vget_high_u16(d)); |
| *dest += stride; |
| vst1_u16(*dest, vget_low_u16(d)); |
| *dest += stride; |
| } |
| |
| void vpx_highbd_idct4x4_1_add_neon(const tran_low_t *input, uint16_t *dest, |
| int stride, int bd) { |
| const int16x8_t max = vdupq_n_s16((1 << bd) - 1); |
| const tran_low_t out0 = HIGHBD_WRAPLOW( |
| dct_const_round_shift(input[0] * (tran_high_t)cospi_16_64), bd); |
| const tran_low_t out1 = HIGHBD_WRAPLOW( |
| dct_const_round_shift(out0 * (tran_high_t)cospi_16_64), bd); |
| const int16_t a1 = ROUND_POWER_OF_TWO(out1, 4); |
| const int16x8_t dc = vdupq_n_s16(a1); |
| |
| highbd_idct4x4_1_add_kernel1(&dest, stride, dc, max); |
| highbd_idct4x4_1_add_kernel1(&dest, stride, dc, max); |
| } |
| |
| void vpx_highbd_idct4x4_16_add_neon(const tran_low_t *input, uint16_t *dest, |
| int stride, int bd) { |
| const int16x8_t max = vdupq_n_s16((1 << bd) - 1); |
| int16x8_t a[2]; |
| int32x4_t c[4]; |
| |
| c[0] = vld1q_s32(input); |
| c[1] = vld1q_s32(input + 4); |
| c[2] = vld1q_s32(input + 8); |
| c[3] = vld1q_s32(input + 12); |
| |
| if (bd == 8) { |
| // Rows |
| a[0] = vcombine_s16(vmovn_s32(c[0]), vmovn_s32(c[1])); |
| a[1] = vcombine_s16(vmovn_s32(c[2]), vmovn_s32(c[3])); |
| transpose_idct4x4_16_bd8(a); |
| |
| // Columns |
| a[1] = vcombine_s16(vget_high_s16(a[1]), vget_low_s16(a[1])); |
| transpose_idct4x4_16_bd8(a); |
| a[0] = vrshrq_n_s16(a[0], 4); |
| a[1] = vrshrq_n_s16(a[1], 4); |
| } else { |
| const int32x4_t cospis = vld1q_s32(kCospi32); |
| |
| if (bd == 10) { |
| idct4x4_16_kernel_bd10(cospis, c); |
| idct4x4_16_kernel_bd10(cospis, c); |
| } else { |
| idct4x4_16_kernel_bd12(cospis, c); |
| idct4x4_16_kernel_bd12(cospis, c); |
| } |
| a[0] = vcombine_s16(vqrshrn_n_s32(c[0], 4), vqrshrn_n_s32(c[1], 4)); |
| a[1] = vcombine_s16(vqrshrn_n_s32(c[3], 4), vqrshrn_n_s32(c[2], 4)); |
| } |
| |
| highbd_idct4x4_1_add_kernel1(&dest, stride, a[0], max); |
| highbd_idct4x4_1_add_kernel2(&dest, stride, a[1], max); |
| } |