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1338c71dfb
vpx/vpx_dsp/arm/intrapred_neon.c
Linfeng Zhang 1338c71dfb Clean horizontal intra prediction NEON optimization 
Change-Id: I1ef0a5b2655cbc7e1cc2a4a1a72e0eed9aa41f05
2016-11-02 11:43:45 -07:00

751 lines
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/*
* Copyright (c) 2014 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_config.h"
#include "./vpx_dsp_rtcd.h"
#include "vpx/vpx_integer.h"
//------------------------------------------------------------------------------
// DC 4x4
static INLINE uint16x4_t dc_sum_4(const uint8_t *ref) {
const uint8x8_t ref_u8 = vld1_u8(ref);
const uint16x4_t p0 = vpaddl_u8(ref_u8);
return vpadd_u16(p0, p0);
}
static INLINE void dc_store_4x4(uint8_t *dst, ptrdiff_t stride,
const uint8x8_t dc) {
const uint8x8_t dc_dup = vdup_lane_u8(dc, 0);
int i;
for (i = 0; i < 4; ++i, dst += stride) {
vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(dc_dup), 0);
}
}
void vpx_dc_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t a = vld1_u8(above);
const uint8x8_t l = vld1_u8(left);
const uint16x8_t al = vaddl_u8(a, l);
uint16x4_t sum;
uint8x8_t dc;
sum = vpadd_u16(vget_low_u16(al), vget_low_u16(al));
sum = vpadd_u16(sum, sum);
dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 3));
dc_store_4x4(dst, stride, dc);
}
void vpx_dc_left_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint16x4_t sum = dc_sum_4(left);
const uint8x8_t dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 2));
(void)above;
dc_store_4x4(dst, stride, dc);
}
void vpx_dc_top_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint16x4_t sum = dc_sum_4(above);
const uint8x8_t dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 2));
(void)left;
dc_store_4x4(dst, stride, dc);
}
void vpx_dc_128_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t dc = vdup_n_u8(0x80);
(void)above;
(void)left;
dc_store_4x4(dst, stride, dc);
}
//------------------------------------------------------------------------------
// DC 8x8
static INLINE uint16x4_t dc_sum_8(const uint8_t *ref) {
const uint8x8_t ref_u8 = vld1_u8(ref);
uint16x4_t sum = vpaddl_u8(ref_u8);
sum = vpadd_u16(sum, sum);
return vpadd_u16(sum, sum);
}
static INLINE void dc_store_8x8(uint8_t *dst, ptrdiff_t stride,
const uint8x8_t dc) {
const uint8x8_t dc_dup = vdup_lane_u8(dc, 0);
int i;
for (i = 0; i < 8; ++i, dst += stride) {
vst1_u8(dst, dc_dup);
}
}
void vpx_dc_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t above_u8 = vld1_u8(above);
const uint8x8_t left_u8 = vld1_u8(left);
const uint8x16_t above_and_left = vcombine_u8(above_u8, left_u8);
const uint16x8_t p0 = vpaddlq_u8(above_and_left);
uint16x4_t sum = vadd_u16(vget_low_u16(p0), vget_high_u16(p0));
uint8x8_t dc;
sum = vpadd_u16(sum, sum);
sum = vpadd_u16(sum, sum);
dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 4));
dc_store_8x8(dst, stride, dc);
}
void vpx_dc_left_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint16x4_t sum = dc_sum_8(left);
const uint8x8_t dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 3));
(void)above;
dc_store_8x8(dst, stride, dc);
}
void vpx_dc_top_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint16x4_t sum = dc_sum_8(above);
const uint8x8_t dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 3));
(void)left;
dc_store_8x8(dst, stride, dc);
}
void vpx_dc_128_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t dc = vdup_n_u8(0x80);
(void)above;
(void)left;
dc_store_8x8(dst, stride, dc);
}
//------------------------------------------------------------------------------
// DC 16x16
static INLINE uint16x4_t dc_sum_16(const uint8_t *ref) {
const uint8x16_t ref_u8 = vld1q_u8(ref);
const uint16x8_t p0 = vpaddlq_u8(ref_u8);
uint16x4_t sum = vadd_u16(vget_low_u16(p0), vget_high_u16(p0));
sum = vpadd_u16(sum, sum);
return vpadd_u16(sum, sum);
}
static INLINE void dc_store_16x16(uint8_t *dst, ptrdiff_t stride,
const uint8x8_t dc) {
const uint8x16_t dc_dup = vdupq_lane_u8(dc, 0);
int i;
for (i = 0; i < 16; ++i, dst += stride) {
vst1q_u8(dst, dc_dup);
}
}
void vpx_dc_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x16_t ref0 = vld1q_u8(above);
const uint8x16_t ref1 = vld1q_u8(left);
const uint16x8_t p0 = vpaddlq_u8(ref0);
const uint16x8_t p1 = vpaddlq_u8(ref1);
const uint16x8_t p2 = vaddq_u16(p0, p1);
uint16x4_t sum = vadd_u16(vget_low_u16(p2), vget_high_u16(p2));
uint8x8_t dc;
sum = vpadd_u16(sum, sum);
sum = vpadd_u16(sum, sum);
dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 5));
dc_store_16x16(dst, stride, dc);
}
void vpx_dc_left_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above,
const uint8_t *left) {
const uint16x4_t sum = dc_sum_16(left);
const uint8x8_t dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 4));
(void)above;
dc_store_16x16(dst, stride, dc);
}
void vpx_dc_top_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above,
const uint8_t *left) {
const uint16x4_t sum = dc_sum_16(above);
const uint8x8_t dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 4));
(void)left;
dc_store_16x16(dst, stride, dc);
}
void vpx_dc_128_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above,
const uint8_t *left) {
const uint8x8_t dc = vdup_n_u8(0x80);
(void)above;
(void)left;
dc_store_16x16(dst, stride, dc);
}
//------------------------------------------------------------------------------
// DC 32x32
static INLINE uint16x4_t dc_sum_32(const uint8_t *ref) {
const uint8x16x2_t r = vld2q_u8(ref);
const uint16x8_t p0 = vpaddlq_u8(r.val[0]);
const uint16x8_t p1 = vpaddlq_u8(r.val[1]);
const uint16x8_t p2 = vaddq_u16(p0, p1);
uint16x4_t sum = vadd_u16(vget_low_u16(p2), vget_high_u16(p2));
sum = vpadd_u16(sum, sum);
return vpadd_u16(sum, sum);
}
static INLINE void dc_store_32x32(uint8_t *dst, ptrdiff_t stride,
const uint8x8_t dc) {
uint8x16x2_t dc_dup;
int i;
dc_dup.val[0] = dc_dup.val[1] = vdupq_lane_u8(dc, 0);
for (i = 0; i < 32; ++i, dst += stride) {
vst2q_u8(dst, dc_dup);
}
}
void vpx_dc_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x16x2_t a = vld2q_u8(above);
const uint8x16x2_t l = vld2q_u8(left);
const uint16x8_t pa0 = vpaddlq_u8(a.val[0]);
const uint16x8_t pl0 = vpaddlq_u8(l.val[0]);
const uint16x8_t pa1 = vpaddlq_u8(a.val[1]);
const uint16x8_t pl1 = vpaddlq_u8(l.val[1]);
const uint16x8_t pa = vaddq_u16(pa0, pa1);
const uint16x8_t pl = vaddq_u16(pl0, pl1);
const uint16x8_t pal = vaddq_u16(pa, pl);
uint16x4_t sum = vadd_u16(vget_low_u16(pal), vget_high_u16(pal));
uint8x8_t dc;
sum = vpadd_u16(sum, sum);
sum = vpadd_u16(sum, sum);
dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 6));
dc_store_32x32(dst, stride, dc);
}
void vpx_dc_left_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above,
const uint8_t *left) {
const uint16x4_t sum = dc_sum_32(left);
const uint8x8_t dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 5));
(void)above;
dc_store_32x32(dst, stride, dc);
}
void vpx_dc_top_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above,
const uint8_t *left) {
const uint16x4_t sum = dc_sum_32(above);
const uint8x8_t dc = vreinterpret_u8_u16(vrshr_n_u16(sum, 5));
(void)left;
dc_store_32x32(dst, stride, dc);
}
void vpx_dc_128_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above,
const uint8_t *left) {
const uint8x8_t dc = vdup_n_u8(0x80);
(void)above;
(void)left;
dc_store_32x32(dst, stride, dc);
}
// -----------------------------------------------------------------------------
void vpx_d45_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t ABCDEFGH = vld1_u8(above);
const uint64x1_t A1 = vshr_n_u64(vreinterpret_u64_u8(ABCDEFGH), 8);
const uint64x1_t A2 = vshr_n_u64(vreinterpret_u64_u8(ABCDEFGH), 16);
const uint8x8_t BCDEFGH0 = vreinterpret_u8_u64(A1);
const uint8x8_t CDEFGH00 = vreinterpret_u8_u64(A2);
const uint8x8_t avg1 = vhadd_u8(ABCDEFGH, CDEFGH00);
const uint8x8_t avg2 = vrhadd_u8(avg1, BCDEFGH0);
const uint64x1_t avg2_u64 = vreinterpret_u64_u8(avg2);
const uint32x2_t r0 = vreinterpret_u32_u8(avg2);
const uint32x2_t r1 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 8));
const uint32x2_t r2 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 16));
const uint32x2_t r3 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 24));
(void)left;
vst1_lane_u32((uint32_t *)(dst + 0 * stride), r0, 0);
vst1_lane_u32((uint32_t *)(dst + 1 * stride), r1, 0);
vst1_lane_u32((uint32_t *)(dst + 2 * stride), r2, 0);
vst1_lane_u32((uint32_t *)(dst + 3 * stride), r3, 0);
vst1_lane_u8(dst + 3 * stride + 3, ABCDEFGH, 7);
}
static INLINE void d45_store_8(uint8_t **dst, const ptrdiff_t stride,
const uint8x8_t above_right, uint8x8_t *row) {
*row = vext_u8(*row, above_right, 1);
vst1_u8(*dst, *row);
*dst += stride;
}
void vpx_d45_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t A0 = vld1_u8(above);
const uint8x8_t above_right = vdup_lane_u8(A0, 7);
const uint8x8_t A1 = vext_u8(A0, above_right, 1);
const uint8x8_t A2 = vext_u8(A0, above_right, 2);
const uint8x8_t avg1 = vhadd_u8(A0, A2);
uint8x8_t row = vrhadd_u8(avg1, A1);
(void)left;
vst1_u8(dst, row);
dst += stride;
d45_store_8(&dst, stride, above_right, &row);
d45_store_8(&dst, stride, above_right, &row);
d45_store_8(&dst, stride, above_right, &row);
d45_store_8(&dst, stride, above_right, &row);
d45_store_8(&dst, stride, above_right, &row);
d45_store_8(&dst, stride, above_right, &row);
vst1_u8(dst, above_right);
}
static INLINE void d45_store_16(uint8_t **dst, const ptrdiff_t stride,
const uint8x16_t above_right, uint8x16_t *row) {
*row = vextq_u8(*row, above_right, 1);
vst1q_u8(*dst, *row);
*dst += stride;
}
void vpx_d45_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x16_t A0 = vld1q_u8(above);
const uint8x16_t above_right = vdupq_lane_u8(vget_high_u8(A0), 7);
const uint8x16_t A1 = vextq_u8(A0, above_right, 1);
const uint8x16_t A2 = vextq_u8(A0, above_right, 2);
const uint8x16_t avg1 = vhaddq_u8(A0, A2);
uint8x16_t row = vrhaddq_u8(avg1, A1);
(void)left;
vst1q_u8(dst, row);
dst += stride;
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
d45_store_16(&dst, stride, above_right, &row);
vst1q_u8(dst, above_right);
}
// -----------------------------------------------------------------------------
void vpx_d135_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t XABCD = vld1_u8(above - 1);
const uint32x2_t zero = vdup_n_u32(0);
const uint32x2_t IJKL = vld1_lane_u32((const uint32_t *)left, zero, 0);
const uint8x8_t LKJI = vrev64_u8(vreinterpret_u8_u32(IJKL));
const uint8x8_t LKJIXABC = vext_u8(LKJI, XABCD, 4);
const uint8x8_t KJIXABCD = vext_u8(LKJI, XABCD, 5);
const uint8x8_t JIXABCD0 =
vreinterpret_u8_u64(vshr_n_u64(vreinterpret_u64_u8(KJIXABCD), 8));
const uint8x8_t avg1 = vhadd_u8(JIXABCD0, LKJIXABC);
const uint8x8_t avg2 = vrhadd_u8(avg1, KJIXABCD);
const uint64x1_t avg2_u64 = vreinterpret_u64_u8(avg2);
const uint32x2_t r3 = vreinterpret_u32_u8(avg2);
const uint32x2_t r2 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 8));
const uint32x2_t r1 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 16));
const uint32x2_t r0 = vreinterpret_u32_u64(vshr_n_u64(avg2_u64, 24));
vst1_lane_u32((uint32_t *)dst, r0, 0);
dst += stride;
vst1_lane_u32((uint32_t *)dst, r1, 0);
dst += stride;
vst1_lane_u32((uint32_t *)dst, r2, 0);
dst += stride;
vst1_lane_u32((uint32_t *)dst, r3, 0);
}
// -----------------------------------------------------------------------------
#if !HAVE_NEON_ASM
void vpx_v_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint32_t d = *(const uint32_t *)above;
int i;
(void)left;
for (i = 0; i < 4; i++, dst += stride) {
*(uint32_t *)dst = d;
}
}
void vpx_v_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t d = vld1_u8(above);
int i;
(void)left;
for (i = 0; i < 8; i++, dst += stride) {
vst1_u8(dst, d);
}
}
void vpx_v_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x16_t d = vld1q_u8(above);
int i;
(void)left;
for (i = 0; i < 16; i++, dst += stride) {
vst1q_u8(dst, d);
}
}
void vpx_v_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x16_t d0 = vld1q_u8(above);
const uint8x16_t d1 = vld1q_u8(above + 16);
int i;
(void)left;
for (i = 0; i < 32; i++) {
// Note: performance was worse using vst2q_u8 under gcc-4.9 & clang-3.8.
// clang-3.8 unrolled the loop fully with no filler so the cause is likely
// the latency of the instruction.
vst1q_u8(dst, d0);
dst += 16;
vst1q_u8(dst, d1);
dst += stride - 16;
}
}
// -----------------------------------------------------------------------------
void vpx_h_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint32x2_t zero = vdup_n_u32(0);
const uint8x8_t left_u8 =
vreinterpret_u8_u32(vld1_lane_u32((const uint32_t *)left, zero, 0));
uint8x8_t d;
(void)above;
d = vdup_lane_u8(left_u8, 0);
vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(d), 0);
dst += stride;
d = vdup_lane_u8(left_u8, 1);
vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(d), 0);
dst += stride;
d = vdup_lane_u8(left_u8, 2);
vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(d), 0);
dst += stride;
d = vdup_lane_u8(left_u8, 3);
vst1_lane_u32((uint32_t *)dst, vreinterpret_u32_u8(d), 0);
}
void vpx_h_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t left_u8 = vld1_u8(left);
uint8x8_t d;
(void)above;
d = vdup_lane_u8(left_u8, 0);
vst1_u8(dst, d);
dst += stride;
d = vdup_lane_u8(left_u8, 1);
vst1_u8(dst, d);
dst += stride;
d = vdup_lane_u8(left_u8, 2);
vst1_u8(dst, d);
dst += stride;
d = vdup_lane_u8(left_u8, 3);
vst1_u8(dst, d);
dst += stride;
d = vdup_lane_u8(left_u8, 4);
vst1_u8(dst, d);
dst += stride;
d = vdup_lane_u8(left_u8, 5);
vst1_u8(dst, d);
dst += stride;
d = vdup_lane_u8(left_u8, 6);
vst1_u8(dst, d);
dst += stride;
d = vdup_lane_u8(left_u8, 7);
vst1_u8(dst, d);
}
static INLINE void h_store_16x8(uint8_t **dst, const ptrdiff_t stride,
const uint8x8_t left) {
const uint8x16_t row_0 = vdupq_lane_u8(left, 0);
const uint8x16_t row_1 = vdupq_lane_u8(left, 1);
const uint8x16_t row_2 = vdupq_lane_u8(left, 2);
const uint8x16_t row_3 = vdupq_lane_u8(left, 3);
const uint8x16_t row_4 = vdupq_lane_u8(left, 4);
const uint8x16_t row_5 = vdupq_lane_u8(left, 5);
const uint8x16_t row_6 = vdupq_lane_u8(left, 6);
const uint8x16_t row_7 = vdupq_lane_u8(left, 7);
vst1q_u8(*dst, row_0);
*dst += stride;
vst1q_u8(*dst, row_1);
*dst += stride;
vst1q_u8(*dst, row_2);
*dst += stride;
vst1q_u8(*dst, row_3);
*dst += stride;
vst1q_u8(*dst, row_4);
*dst += stride;
vst1q_u8(*dst, row_5);
*dst += stride;
vst1q_u8(*dst, row_6);
*dst += stride;
vst1q_u8(*dst, row_7);
*dst += stride;
}
void vpx_h_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x16_t left_u8q = vld1q_u8(left);
(void)above;
h_store_16x8(&dst, stride, vget_low_u8(left_u8q));
h_store_16x8(&dst, stride, vget_high_u8(left_u8q));
}
static INLINE void h_store_32x8(uint8_t **dst, const ptrdiff_t stride,
const uint8x8_t left) {
const uint8x16_t row_0 = vdupq_lane_u8(left, 0);
const uint8x16_t row_1 = vdupq_lane_u8(left, 1);
const uint8x16_t row_2 = vdupq_lane_u8(left, 2);
const uint8x16_t row_3 = vdupq_lane_u8(left, 3);
const uint8x16_t row_4 = vdupq_lane_u8(left, 4);
const uint8x16_t row_5 = vdupq_lane_u8(left, 5);
const uint8x16_t row_6 = vdupq_lane_u8(left, 6);
const uint8x16_t row_7 = vdupq_lane_u8(left, 7);
vst1q_u8(*dst, row_0); // Note clang-3.8 produced poor code w/vst2q_u8
*dst += 16;
vst1q_u8(*dst, row_0);
*dst += stride - 16;
vst1q_u8(*dst, row_1);
*dst += 16;
vst1q_u8(*dst, row_1);
*dst += stride - 16;
vst1q_u8(*dst, row_2);
*dst += 16;
vst1q_u8(*dst, row_2);
*dst += stride - 16;
vst1q_u8(*dst, row_3);
*dst += 16;
vst1q_u8(*dst, row_3);
*dst += stride - 16;
vst1q_u8(*dst, row_4);
*dst += 16;
vst1q_u8(*dst, row_4);
*dst += stride - 16;
vst1q_u8(*dst, row_5);
*dst += 16;
vst1q_u8(*dst, row_5);
*dst += stride - 16;
vst1q_u8(*dst, row_6);
*dst += 16;
vst1q_u8(*dst, row_6);
*dst += stride - 16;
vst1q_u8(*dst, row_7);
*dst += 16;
vst1q_u8(*dst, row_7);
*dst += stride - 16;
}
void vpx_h_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
int i;
(void)above;
for (i = 0; i < 2; i++, left += 16) {
const uint8x16_t left_u8 = vld1q_u8(left);
h_store_32x8(&dst, stride, vget_low_u8(left_u8));
h_store_32x8(&dst, stride, vget_high_u8(left_u8));
}
}
// -----------------------------------------------------------------------------
static INLINE int16x8_t convert_u8_to_s16(uint8x8_t v) {
return vreinterpretq_s16_u16(vmovl_u8(v));
}
void vpx_tm_predictor_4x4_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t top_left = vld1_dup_u8(above - 1);
const uint8x8_t left_u8 = vld1_u8(left);
const uint8x8_t above_u8 = vld1_u8(above);
const int16x4_t left_s16 = vget_low_s16(convert_u8_to_s16(left_u8));
int16x8_t sub, sum;
uint32x2_t d;
sub = vreinterpretq_s16_u16(vsubl_u8(above_u8, top_left));
// Avoid vcombine_s16() which generates lots of redundant code with clang-3.8.
sub = vreinterpretq_s16_s64(
vdupq_lane_s64(vreinterpret_s64_s16(vget_low_s16(sub)), 0));
sum = vcombine_s16(vdup_lane_s16(left_s16, 0), vdup_lane_s16(left_s16, 1));
sum = vaddq_s16(sum, sub);
d = vreinterpret_u32_u8(vqmovun_s16(sum));
vst1_lane_u32((uint32_t *)dst, d, 0);
dst += stride;
vst1_lane_u32((uint32_t *)dst, d, 1);
dst += stride;
sum = vcombine_s16(vdup_lane_s16(left_s16, 2), vdup_lane_s16(left_s16, 3));
sum = vaddq_s16(sum, sub);
d = vreinterpret_u32_u8(vqmovun_s16(sum));
vst1_lane_u32((uint32_t *)dst, d, 0);
dst += stride;
vst1_lane_u32((uint32_t *)dst, d, 1);
}
static INLINE void tm_8_kernel(uint8_t **dst, const ptrdiff_t stride,
const int16x8_t left_dup, const int16x8_t sub) {
const int16x8_t sum = vaddq_s16(left_dup, sub);
const uint8x8_t d = vqmovun_s16(sum);
vst1_u8(*dst, d);
*dst += stride;
}
void vpx_tm_predictor_8x8_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x8_t top_left = vld1_dup_u8(above - 1);
const uint8x8_t above_u8 = vld1_u8(above);
const uint8x8_t left_u8 = vld1_u8(left);
const int16x8_t left_s16q = convert_u8_to_s16(left_u8);
const int16x8_t sub = vreinterpretq_s16_u16(vsubl_u8(above_u8, top_left));
int16x4_t left_s16d = vget_low_s16(left_s16q);
int i;
for (i = 0; i < 2; i++, left_s16d = vget_high_s16(left_s16q)) {
int16x8_t left_dup;
left_dup = vdupq_lane_s16(left_s16d, 0);
tm_8_kernel(&dst, stride, left_dup, sub);
left_dup = vdupq_lane_s16(left_s16d, 1);
tm_8_kernel(&dst, stride, left_dup, sub);
left_dup = vdupq_lane_s16(left_s16d, 2);
tm_8_kernel(&dst, stride, left_dup, sub);
left_dup = vdupq_lane_s16(left_s16d, 3);
tm_8_kernel(&dst, stride, left_dup, sub);
}
}
static INLINE void tm_16_kernel(uint8_t **dst, const ptrdiff_t stride,
const int16x8_t left_dup, const int16x8_t sub0,
const int16x8_t sub1) {
const int16x8_t sum0 = vaddq_s16(left_dup, sub0);
const int16x8_t sum1 = vaddq_s16(left_dup, sub1);
const uint8x8_t d0 = vqmovun_s16(sum0);
const uint8x8_t d1 = vqmovun_s16(sum1);
vst1_u8(*dst, d0);
*dst += 8;
vst1_u8(*dst, d1);
*dst += stride - 8;
}
void vpx_tm_predictor_16x16_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x16_t top_left = vld1q_dup_u8(above - 1);
const uint8x16_t above_u8 = vld1q_u8(above);
const int16x8_t sub0 = vreinterpretq_s16_u16(
vsubl_u8(vget_low_u8(above_u8), vget_low_u8(top_left)));
const int16x8_t sub1 = vreinterpretq_s16_u16(
vsubl_u8(vget_high_u8(above_u8), vget_high_u8(top_left)));
int16x8_t left_dup;
int i;
for (i = 0; i < 2; i++, left += 8) {
const uint8x8_t left_u8 = vld1_u8(left);
const int16x8_t left_s16q = convert_u8_to_s16(left_u8);
const int16x4_t left_low = vget_low_s16(left_s16q);
const int16x4_t left_high = vget_high_s16(left_s16q);
left_dup = vdupq_lane_s16(left_low, 0);
tm_16_kernel(&dst, stride, left_dup, sub0, sub1);
left_dup = vdupq_lane_s16(left_low, 1);
tm_16_kernel(&dst, stride, left_dup, sub0, sub1);
left_dup = vdupq_lane_s16(left_low, 2);
tm_16_kernel(&dst, stride, left_dup, sub0, sub1);
left_dup = vdupq_lane_s16(left_low, 3);
tm_16_kernel(&dst, stride, left_dup, sub0, sub1);
left_dup = vdupq_lane_s16(left_high, 0);
tm_16_kernel(&dst, stride, left_dup, sub0, sub1);
left_dup = vdupq_lane_s16(left_high, 1);
tm_16_kernel(&dst, stride, left_dup, sub0, sub1);
left_dup = vdupq_lane_s16(left_high, 2);
tm_16_kernel(&dst, stride, left_dup, sub0, sub1);
left_dup = vdupq_lane_s16(left_high, 3);
tm_16_kernel(&dst, stride, left_dup, sub0, sub1);
}
}
static INLINE void tm_32_kernel(uint8_t **dst, const ptrdiff_t stride,
const int16x8_t left_dup, const int16x8_t sub0,
const int16x8_t sub1, const int16x8_t sub2,
const int16x8_t sub3) {
const int16x8_t sum0 = vaddq_s16(left_dup, sub0);
const int16x8_t sum1 = vaddq_s16(left_dup, sub1);
const int16x8_t sum2 = vaddq_s16(left_dup, sub2);
const int16x8_t sum3 = vaddq_s16(left_dup, sub3);
const uint8x8_t d0 = vqmovun_s16(sum0);
const uint8x8_t d1 = vqmovun_s16(sum1);
const uint8x8_t d2 = vqmovun_s16(sum2);
const uint8x8_t d3 = vqmovun_s16(sum3);
vst1q_u8(*dst, vcombine_u8(d0, d1));
*dst += 16;
vst1q_u8(*dst, vcombine_u8(d2, d3));
*dst += stride - 16;
}
void vpx_tm_predictor_32x32_neon(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const uint8x16_t top_left = vld1q_dup_u8(above - 1);
const uint8x16_t above_low = vld1q_u8(above);
const uint8x16_t above_high = vld1q_u8(above + 16);
const int16x8_t sub0 = vreinterpretq_s16_u16(
vsubl_u8(vget_low_u8(above_low), vget_low_u8(top_left)));
const int16x8_t sub1 = vreinterpretq_s16_u16(
vsubl_u8(vget_high_u8(above_low), vget_high_u8(top_left)));
const int16x8_t sub2 = vreinterpretq_s16_u16(
vsubl_u8(vget_low_u8(above_high), vget_low_u8(top_left)));
const int16x8_t sub3 = vreinterpretq_s16_u16(
vsubl_u8(vget_high_u8(above_high), vget_high_u8(top_left)));
int16x8_t left_dup;
int i, j;
for (j = 0; j < 4; j++, left += 8) {
const uint8x8_t left_u8 = vld1_u8(left);
const int16x8_t left_s16q = convert_u8_to_s16(left_u8);
int16x4_t left_s16d = vget_low_s16(left_s16q);
for (i = 0; i < 2; i++, left_s16d = vget_high_s16(left_s16q)) {
left_dup = vdupq_lane_s16(left_s16d, 0);
tm_32_kernel(&dst, stride, left_dup, sub0, sub1, sub2, sub3);
left_dup = vdupq_lane_s16(left_s16d, 1);
tm_32_kernel(&dst, stride, left_dup, sub0, sub1, sub2, sub3);
left_dup = vdupq_lane_s16(left_s16d, 2);
tm_32_kernel(&dst, stride, left_dup, sub0, sub1, sub2, sub3);
left_dup = vdupq_lane_s16(left_s16d, 3);
tm_32_kernel(&dst, stride, left_dup, sub0, sub1, sub2, sub3);
}
}
}
#endif // !HAVE_NEON_ASM
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