/*
* Copyright (c) 2018 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.
*/
#ifndef VPX_VP9_COMMON_ARM_NEON_VP9_IHT_NEON_H_
#define VPX_VP9_COMMON_ARM_NEON_VP9_IHT_NEON_H_
#include <arm_neon.h>
#include "./vp9_rtcd.h"
#include "./vpx_config.h"
#include "vp9/common/vp9_common.h"
#include "vpx_dsp/arm/idct_neon.h"
#include "vpx_dsp/arm/mem_neon.h"
#include "vpx_dsp/txfm_common.h"
static INLINE void iadst4(int16x8_t *
const io) {
const int32x4_t c3 = vdupq_n_s32(sinpi_3_9);
int16x4_t x[
4];
int32x4_t s[
8], output[
4];
const int16x4_t c =
create_s16x4_neon(sinpi_1_9, sinpi_2_9, sinpi_3_9, sinpi_4_9);
x[
0] = vget_low_s16(io[
0]);
x[
1] = vget_low_s16(io[
1]);
x[
2] = vget_high_s16(io[
0]);
x[
3] = vget_high_s16(io[
1]);
s[
0] = vmull_lane_s16(x[
0], c,
0);
s[
1] = vmull_lane_s16(x[
0], c,
1);
s[
2] = vmull_lane_s16(x[
1], c,
2);
s[
3] = vmull_lane_s16(x[
2], c,
3);
s[
4] = vmull_lane_s16(x[
2], c,
0);
s[
5] = vmull_lane_s16(x[
3], c,
1);
s[
6] = vmull_lane_s16(x[
3], c,
3);
s[
7] = vaddl_s16(x[
0], x[
3]);
s[
7] = vsubw_s16(s[
7], x[
2]);
s[
0] = vaddq_s32(s[
0], s[
3]);
s[
0] = vaddq_s32(s[
0], s[
5]);
s[
1] = vsubq_s32(s[
1], s[
4]);
s[
1] = vsubq_s32(s[
1], s[
6]);
s[
3] = s[
2];
s[
2] = vmulq_s32(c3, s[
7]);
output[
0] = vaddq_s32(s[
0], s[
3]);
output[
1] = vaddq_s32(s[
1], s[
3]);
output[
2] = s[
2];
output[
3] = vaddq_s32(s[
0], s[
1]);
output[
3] = vsubq_s32(output[
3], s[
3]);
dct_const_round_shift_low_8_dual(output, &io[
0], &io[
'color: green'>1]);
}
static INLINE void iadst_half_butterfly_neon(int16x8_t *
const x,
const int16x4_t c) {
// Don't add/sub before multiply, which will overflow in iadst8.
const int32x4_t x0_lo = vmull_lane_s16(vget_low_s16(x[
0]), c,
0);
const int32x4_t x0_hi = vmull_lane_s16(vget_high_s16(x[
0]), c,
0);
const int32x4_t x1_lo = vmull_lane_s16(vget_low_s16(x[
1]), c,
0);
const int32x4_t x1_hi = vmull_lane_s16(vget_high_s16(x[
1]), c,
0);
int32x4_t t0[
2], t1[
2];
t0[
0] = vaddq_s32(x0_lo, x1_lo);
t0[
1] = vaddq_s32(x0_hi, x1_hi);
t1[
0] = vsubq_s32(x0_lo, x1_lo);
t1[
1] = vsubq_s32(x0_hi, x1_hi);
x[
0] = dct_const_round_shift_low_8(t0);
x[
1] = dct_const_round_shift_low_8(t1);
}
static INLINE void iadst_half_butterfly_neg_neon(int16x8_t *
const x0,
int16x8_t *
const x1,
const int16x4_t c) {
// Don't add/sub before multiply, which will overflow in iadst8.
const int32x4_t x0_lo = vmull_lane_s16(vget_low_s16(*x0), c,
1);
const int32x4_t x0_hi = vmull_lane_s16(vget_high_s16(*x0), c,
1);
const int32x4_t x1_lo = vmull_lane_s16(vget_low_s16(*x1), c,
1);
const int32x4_t x1_hi = vmull_lane_s16(vget_high_s16(*x1), c,
1);
int32x4_t t0[
2], t1[
2];
t0[
0] = vaddq_s32(x0_lo, x1_lo);
t0[
1] = vaddq_s32(x0_hi, x1_hi);
t1[
0] = vsubq_s32(x0_lo, x1_lo);
t1[
1] = vsubq_s32(x0_hi, x1_hi);
*x1 = dct_const_round_shift_low_8(t0);
*x0 = dct_const_round_shift_low_8(t1);
}
static INLINE void iadst_half_butterfly_pos_neon(int16x8_t *
const x0,
int16x8_t *
const x1,
const int16x4_t c) {
// Don't add/sub before multiply, which will overflow in iadst8.
const int32x4_t x0_lo = vmull_lane_s16(vget_low_s16(*x0), c,
0);
const int32x4_t x0_hi = vmull_lane_s16(vget_high_s16(*x0), c,
0);
const int32x4_t x1_lo = vmull_lane_s16(vget_low_s16(*x1), c,
0);
const int32x4_t x1_hi = vmull_lane_s16(vget_high_s16(*x1), c,
0);
int32x4_t t0[
2], t1[
2];
t0[
0] = vaddq_s32(x0_lo, x1_lo);
t0[
1] = vaddq_s32(x0_hi, x1_hi);
t1[
0] = vsubq_s32(x0_lo, x1_lo);
t1[
1] = vsubq_s32(x0_hi, x1_hi);
*x1 = dct_const_round_shift_low_8(t0);
*x0 = dct_const_round_shift_low_8(t1);
}
static INLINE void iadst_butterfly_lane_0_1_neon(
const int16x8_t in0,
const int16x8_t in1,
const int16x4_t c,
int32x4_t *
const s0,
int32x4_t *
const s1) {
s0[
0] = vmull_lane_s16(vget_low_s16(in0), c,
0);
s0[
1] = vmull_lane_s16(vget_high_s16(in0), c,
0);
s1[
0] = vmull_lane_s16(vget_low_s16(in0), c,
1);
s1[
1] = vmull_lane_s16(vget_high_s16(in0), c,
1);
s0[
0] = vmlal_lane_s16(s0[
0], vget_low_s16(in1), c,
1);
s0[
1] = vmlal_lane_s16(s0[
1], vget_high_s16(in1), c,
1);
s1[
0] = vmlsl_lane_s16(s1[
0], vget_low_s16(in1), c,
0);
s1[
1] = vmlsl_lane_s16(s1[
1], vget_high_s16(in1), c,
0);
}
static INLINE void iadst_butterfly_lane_2_3_neon(
const int16x8_t in0,
const int16x8_t in1,
const int16x4_t c,
int32x4_t *
const s0,
int32x4_t *
const s1) {
s0[
0] = vmull_lane_s16(vget_low_s16(in0), c,
2);
s0[
1] = vmull_lane_s16(vget_high_s16(in0), c,
2);
s1[
0] = vmull_lane_s16(vget_low_s16(in0), c,
3);
s1[
1] = vmull_lane_s16(vget_high_s16(in0), c,
3);
s0[
0] = vmlal_lane_s16(s0[
0], vget_low_s16(in1), c,
3);
s0[
1] = vmlal_lane_s16(s0[
1], vget_high_s16(in1), c,
3);
s1[
0] = vmlsl_lane_s16(s1[
0], vget_low_s16(in1), c,
2);
s1[
1] = vmlsl_lane_s16(s1[
1], vget_high_s16(in1), c,
2);
}
static INLINE void iadst_butterfly_lane_1_0_neon(
const int16x8_t in0,
const int16x8_t in1,
const int16x4_t c,
int32x4_t *
const s0,
int32x4_t *
const s1) {
s0[
0] = vmull_lane_s16(vget_low_s16(in0), c,
1);
s0[
1] = vmull_lane_s16(vget_high_s16(in0), c,
1);
s1[
0] = vmull_lane_s16(vget_low_s16(in0), c,
0);
s1[
1] = vmull_lane_s16(vget_high_s16(in0), c,
0);
s0[
0] = vmlal_lane_s16(s0[
0], vget_low_s16(in1), c,
0);
s0[
1] = vmlal_lane_s16(s0[
1], vget_high_s16(in1), c,
0);
s1[
0] = vmlsl_lane_s16(s1[
0], vget_low_s16(in1), c,
1);
s1[
1] = vmlsl_lane_s16(s1[
1], vget_high_s16(in1), c,
1);
}
static INLINE void iadst_butterfly_lane_3_2_neon(
const int16x8_t in0,
const int16x8_t in1,
const int16x4_t c,
int32x4_t *
const s0,
int32x4_t *
const s1) {
s0[
0] = vmull_lane_s16(vget_low_s16(in0), c,
3);
s0[
1] = vmull_lane_s16(vget_high_s16(in0), c,
3);
s1[
0] = vmull_lane_s16(vget_low_s16(in0), c,
2);
s1[
1] = vmull_lane_s16(vget_high_s16(in0), c,
2);
s0[
0] = vmlal_lane_s16(s0[
0], vget_low_s16(in1), c,
2);
s0[
1] = vmlal_lane_s16(s0[
1], vget_high_s16(in1), c,
2);
s1[
0] = vmlsl_lane_s16(s1[
0], vget_low_s16(in1), c,
3);
s1[
1] = vmlsl_lane_s16(s1[
1], vget_high_s16(in1), c,
3);
}
static INLINE int16x8_t add_dct_const_round_shift_low_8(
const int32x4_t *
const in0,
const int32x4_t *
const in1) {
int32x4_t sum[
2];
sum[
0] = vaddq_s32(in0[
0], in1[
0]);
sum[
1] = vaddq_s32(in0[
1], in1[
1]);
return dct_const_round_shift_low_8(sum);
}
static INLINE int16x8_t sub_dct_const_round_shift_low_8(
const int32x4_t *
const in0,
const int32x4_t *
const in1) {
int32x4_t sum[
2];
sum[
0] = vsubq_s32(in0[
0], in1[
0]);
sum[
1] = vsubq_s32(in0[
1], in1[
1]);
return dct_const_round_shift_low_8(sum);
}
static INLINE void iadst8(int16x8_t *
const io) {
const int16x4_t c0 =
create_s16x4_neon(cospi_2_64, cospi_30_64, cospi_10_64, cospi_22_64);
const int16x4_t c1 =
create_s16x4_neon(cospi_18_64, cospi_14_64, cospi_26_64, cospi_6_64);
const int16x4_t c2 =
create_s16x4_neon(cospi_16_64,
0, cospi_8_64, cospi_24_64);
int16x8_t x[
8], t[
4];
int32x4_t s0[
2], s1[
2], s2[
2], s3[
2], s4[
2], s5[
2], s6[
2], s7[
2];
x[
0] = io[
7];
x[
1] = io[
0];
x[
2] = io[
5];
x[
3] = io[
2];
x[
4] = io[
3];
x[
5] = io[
4];
x[
6] = io[
1];
x[
7] = io[
6];
// stage 1
iadst_butterfly_lane_0_1_neon(x[
0], x[
1], c0, s0, s1);
iadst_butterfly_lane_2_3_neon(x[
2], x[
3], c0, s2, s3);
iadst_butterfly_lane_0_1_neon(x[
4], x[
5], c1, s4, s5);
iadst_butterfly_lane_2_3_neon(x[
6], x[
7], c1, s6, s7);
x[
0] = add_dct_const_round_shift_low_8(s0, s4);
x[
1] = add_dct_const_round_shift_low_8(s1, s5);
x[
2] = add_dct_const_round_shift_low_8(s2, s6);
x[
3] = add_dct_const_round_shift_low_8(s3, s7);
x[
4] = sub_dct_const_round_shift_low_8(s0, s4);
x[
5] = sub_dct_const_round_shift_low_8(s1, s5);
x[
6] = sub_dct_const_round_shift_low_8(s2, s6);
x[
7] = sub_dct_const_round_shift_low_8(s3, s7);
// stage 2
t[
0] = x[
0];
t[
1] = x[
1];
t[
2] = x[
2];
t[
3] = x[
3];
iadst_butterfly_lane_2_3_neon(x[
4], x[
5], c2, s4, s5);
iadst_butterfly_lane_3_2_neon(x[
7], x[
6], c2, s7, s6);
x[
0] = vaddq_s16(t[
0], t[
2]);
x[
1] = vaddq_s16(t[
1], t[
3]);
x[
2] = vsubq_s16(t[
0], t[
2]);
x[
3] = vsubq_s16(t[
1], t[
3]);
x[
4] = add_dct_const_round_shift_low_8(s4, s6);
x[
5] = add_dct_const_round_shift_low_8(s5, s7);
x[
6] = sub_dct_const_round_shift_low_8(s4, s6);
x[
7] = sub_dct_const_round_shift_low_8(s5, s7);
// stage 3
iadst_half_butterfly_neon(x +
2, c2);
iadst_half_butterfly_neon(x +
6, c2);
io[
0] = x[
0];
io[
1] = vnegq_s16(x[
4]);
io[
2] = x[
6];
io[
3] = vnegq_s16(x[
2]);
io[
4] = x[
3];
io[
5] = vnegq_s16(x[
7]);
io[
6] = x[
5];
io[
7] = vnegq_s16(x[
1]);
}
void vpx_iadst16x16_256_add_half1d(
const void *
const input, int16_t *output,
void *
const dest,
const int stride,
const int highbd_flag);
typedef void (*iht_1d)(
const void *
const input, int16_t *output,
void *
const dest,
const int stride,
const int highbd_flag);
typedef struct {
iht_1d cols, rows;
// vertical and horizontal
} iht_2d;
#endif // VPX_VP9_COMMON_ARM_NEON_VP9_IHT_NEON_H_
