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Diffstat (limited to '')
| -rw-r--r-- | third_party/aom/aom_dsp/arm/highbd_intrapred_neon.c | 2730 |
1 files changed, 2730 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/arm/highbd_intrapred_neon.c b/third_party/aom/aom_dsp/arm/highbd_intrapred_neon.c new file mode 100644 index 0000000000..dc47974c68 --- /dev/null +++ b/third_party/aom/aom_dsp/arm/highbd_intrapred_neon.c @@ -0,0 +1,2730 @@ +/* + * Copyright (c) 2022, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include <arm_neon.h> + +#include "config/aom_config.h" +#include "config/aom_dsp_rtcd.h" +#include "config/av1_rtcd.h" + +#include "aom/aom_integer.h" +#include "aom_dsp/arm/sum_neon.h" +#include "aom_dsp/arm/transpose_neon.h" +#include "aom_dsp/intrapred_common.h" + +// ----------------------------------------------------------------------------- +// DC + +static INLINE void highbd_dc_store_4xh(uint16_t *dst, ptrdiff_t stride, int h, + uint16x4_t dc) { + for (int i = 0; i < h; ++i) { + vst1_u16(dst + i * stride, dc); + } +} + +static INLINE void highbd_dc_store_8xh(uint16_t *dst, ptrdiff_t stride, int h, + uint16x8_t dc) { + for (int i = 0; i < h; ++i) { + vst1q_u16(dst + i * stride, dc); + } +} + +static INLINE void highbd_dc_store_16xh(uint16_t *dst, ptrdiff_t stride, int h, + uint16x8_t dc) { + for (int i = 0; i < h; ++i) { + vst1q_u16(dst + i * stride, dc); + vst1q_u16(dst + i * stride + 8, dc); + } +} + +static INLINE void highbd_dc_store_32xh(uint16_t *dst, ptrdiff_t stride, int h, + uint16x8_t dc) { + for (int i = 0; i < h; ++i) { + vst1q_u16(dst + i * stride, dc); + vst1q_u16(dst + i * stride + 8, dc); + vst1q_u16(dst + i * stride + 16, dc); + vst1q_u16(dst + i * stride + 24, dc); + } +} + +static INLINE void highbd_dc_store_64xh(uint16_t *dst, ptrdiff_t stride, int h, + uint16x8_t dc) { + for (int i = 0; i < h; ++i) { + vst1q_u16(dst + i * stride, dc); + vst1q_u16(dst + i * stride + 8, dc); + vst1q_u16(dst + i * stride + 16, dc); + vst1q_u16(dst + i * stride + 24, dc); + vst1q_u16(dst + i * stride + 32, dc); + vst1q_u16(dst + i * stride + 40, dc); + vst1q_u16(dst + i * stride + 48, dc); + vst1q_u16(dst + i * stride + 56, dc); + } +} + +static INLINE uint32x4_t horizontal_add_and_broadcast_long_u16x8(uint16x8_t a) { + // Need to assume input is up to 16 bits wide from dc 64x64 partial sum, so + // promote first. + const uint32x4_t b = vpaddlq_u16(a); +#if AOM_ARCH_AARCH64 + const uint32x4_t c = vpaddq_u32(b, b); + return vpaddq_u32(c, c); +#else + const uint32x2_t c = vadd_u32(vget_low_u32(b), vget_high_u32(b)); + const uint32x2_t d = vpadd_u32(c, c); + return vcombine_u32(d, d); +#endif +} + +static INLINE uint16x8_t highbd_dc_load_partial_sum_4(const uint16_t *left) { + // Nothing to do since sum is already one vector, but saves needing to + // special case w=4 or h=4 cases. The combine will be zero cost for a sane + // compiler since vld1 already sets the top half of a vector to zero as part + // of the operation. + return vcombine_u16(vld1_u16(left), vdup_n_u16(0)); +} + +static INLINE uint16x8_t highbd_dc_load_partial_sum_8(const uint16_t *left) { + // Nothing to do since sum is already one vector, but saves needing to + // special case w=8 or h=8 cases. + return vld1q_u16(left); +} + +static INLINE uint16x8_t highbd_dc_load_partial_sum_16(const uint16_t *left) { + const uint16x8_t a0 = vld1q_u16(left + 0); // up to 12 bits + const uint16x8_t a1 = vld1q_u16(left + 8); + return vaddq_u16(a0, a1); // up to 13 bits +} + +static INLINE uint16x8_t highbd_dc_load_partial_sum_32(const uint16_t *left) { + const uint16x8_t a0 = vld1q_u16(left + 0); // up to 12 bits + const uint16x8_t a1 = vld1q_u16(left + 8); + const uint16x8_t a2 = vld1q_u16(left + 16); + const uint16x8_t a3 = vld1q_u16(left + 24); + const uint16x8_t b0 = vaddq_u16(a0, a1); // up to 13 bits + const uint16x8_t b1 = vaddq_u16(a2, a3); + return vaddq_u16(b0, b1); // up to 14 bits +} + +static INLINE uint16x8_t highbd_dc_load_partial_sum_64(const uint16_t *left) { + const uint16x8_t a0 = vld1q_u16(left + 0); // up to 12 bits + const uint16x8_t a1 = vld1q_u16(left + 8); + const uint16x8_t a2 = vld1q_u16(left + 16); + const uint16x8_t a3 = vld1q_u16(left + 24); + const uint16x8_t a4 = vld1q_u16(left + 32); + const uint16x8_t a5 = vld1q_u16(left + 40); + const uint16x8_t a6 = vld1q_u16(left + 48); + const uint16x8_t a7 = vld1q_u16(left + 56); + const uint16x8_t b0 = vaddq_u16(a0, a1); // up to 13 bits + const uint16x8_t b1 = vaddq_u16(a2, a3); + const uint16x8_t b2 = vaddq_u16(a4, a5); + const uint16x8_t b3 = vaddq_u16(a6, a7); + const uint16x8_t c0 = vaddq_u16(b0, b1); // up to 14 bits + const uint16x8_t c1 = vaddq_u16(b2, b3); + return vaddq_u16(c0, c1); // up to 15 bits +} + +#define HIGHBD_DC_PREDICTOR(w, h, shift) \ + void aom_highbd_dc_predictor_##w##x##h##_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + const uint16x8_t a = highbd_dc_load_partial_sum_##w(above); \ + const uint16x8_t l = highbd_dc_load_partial_sum_##h(left); \ + const uint32x4_t sum = \ + horizontal_add_and_broadcast_long_u16x8(vaddq_u16(a, l)); \ + const uint16x4_t dc0 = vrshrn_n_u32(sum, shift); \ + highbd_dc_store_##w##xh(dst, stride, (h), vdupq_lane_u16(dc0, 0)); \ + } + +void aom_highbd_dc_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, int bd) { + // In the rectangular cases we simply extend the shorter vector to uint16x8 + // in order to accumulate, however in the 4x4 case there is no shorter vector + // to extend so it is beneficial to do the whole calculation in uint16x4 + // instead. + (void)bd; + const uint16x4_t a = vld1_u16(above); // up to 12 bits + const uint16x4_t l = vld1_u16(left); + uint16x4_t sum = vpadd_u16(a, l); // up to 13 bits + sum = vpadd_u16(sum, sum); // up to 14 bits + sum = vpadd_u16(sum, sum); + const uint16x4_t dc = vrshr_n_u16(sum, 3); + highbd_dc_store_4xh(dst, stride, 4, dc); +} + +HIGHBD_DC_PREDICTOR(8, 8, 4) +HIGHBD_DC_PREDICTOR(16, 16, 5) +HIGHBD_DC_PREDICTOR(32, 32, 6) +HIGHBD_DC_PREDICTOR(64, 64, 7) + +#undef HIGHBD_DC_PREDICTOR + +static INLINE int divide_using_multiply_shift(int num, int shift1, + int multiplier, int shift2) { + const int interm = num >> shift1; + return interm * multiplier >> shift2; +} + +#define HIGHBD_DC_MULTIPLIER_1X2 0xAAAB +#define HIGHBD_DC_MULTIPLIER_1X4 0x6667 +#define HIGHBD_DC_SHIFT2 17 + +static INLINE int highbd_dc_predictor_rect(int bw, int bh, int sum, int shift1, + uint32_t multiplier) { + return divide_using_multiply_shift(sum + ((bw + bh) >> 1), shift1, multiplier, + HIGHBD_DC_SHIFT2); +} + +#undef HIGHBD_DC_SHIFT2 + +#define HIGHBD_DC_PREDICTOR_RECT(w, h, q, shift, mult) \ + void aom_highbd_dc_predictor_##w##x##h##_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + uint16x8_t sum_above = highbd_dc_load_partial_sum_##w(above); \ + uint16x8_t sum_left = highbd_dc_load_partial_sum_##h(left); \ + uint16x8_t sum_vec = vaddq_u16(sum_left, sum_above); \ + int sum = horizontal_add_u16x8(sum_vec); \ + int dc0 = highbd_dc_predictor_rect((w), (h), sum, (shift), (mult)); \ + highbd_dc_store_##w##xh(dst, stride, (h), vdup##q##_n_u16(dc0)); \ + } + +HIGHBD_DC_PREDICTOR_RECT(4, 8, , 2, HIGHBD_DC_MULTIPLIER_1X2) +HIGHBD_DC_PREDICTOR_RECT(4, 16, , 2, HIGHBD_DC_MULTIPLIER_1X4) +HIGHBD_DC_PREDICTOR_RECT(8, 4, q, 2, HIGHBD_DC_MULTIPLIER_1X2) +HIGHBD_DC_PREDICTOR_RECT(8, 16, q, 3, HIGHBD_DC_MULTIPLIER_1X2) +HIGHBD_DC_PREDICTOR_RECT(8, 32, q, 3, HIGHBD_DC_MULTIPLIER_1X4) +HIGHBD_DC_PREDICTOR_RECT(16, 4, q, 2, HIGHBD_DC_MULTIPLIER_1X4) +HIGHBD_DC_PREDICTOR_RECT(16, 8, q, 3, HIGHBD_DC_MULTIPLIER_1X2) +HIGHBD_DC_PREDICTOR_RECT(16, 32, q, 4, HIGHBD_DC_MULTIPLIER_1X2) +HIGHBD_DC_PREDICTOR_RECT(16, 64, q, 4, HIGHBD_DC_MULTIPLIER_1X4) +HIGHBD_DC_PREDICTOR_RECT(32, 8, q, 3, HIGHBD_DC_MULTIPLIER_1X4) +HIGHBD_DC_PREDICTOR_RECT(32, 16, q, 4, HIGHBD_DC_MULTIPLIER_1X2) +HIGHBD_DC_PREDICTOR_RECT(32, 64, q, 5, HIGHBD_DC_MULTIPLIER_1X2) +HIGHBD_DC_PREDICTOR_RECT(64, 16, q, 4, HIGHBD_DC_MULTIPLIER_1X4) +HIGHBD_DC_PREDICTOR_RECT(64, 32, q, 5, HIGHBD_DC_MULTIPLIER_1X2) + +#undef HIGHBD_DC_PREDICTOR_RECT +#undef HIGHBD_DC_MULTIPLIER_1X2 +#undef HIGHBD_DC_MULTIPLIER_1X4 + +// ----------------------------------------------------------------------------- +// DC_128 + +#define HIGHBD_DC_PREDICTOR_128(w, h, q) \ + void aom_highbd_dc_128_predictor_##w##x##h##_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)above; \ + (void)bd; \ + (void)left; \ + highbd_dc_store_##w##xh(dst, stride, (h), \ + vdup##q##_n_u16(0x80 << (bd - 8))); \ + } + +HIGHBD_DC_PREDICTOR_128(4, 4, ) +HIGHBD_DC_PREDICTOR_128(4, 8, ) +HIGHBD_DC_PREDICTOR_128(4, 16, ) +HIGHBD_DC_PREDICTOR_128(8, 4, q) +HIGHBD_DC_PREDICTOR_128(8, 8, q) +HIGHBD_DC_PREDICTOR_128(8, 16, q) +HIGHBD_DC_PREDICTOR_128(8, 32, q) +HIGHBD_DC_PREDICTOR_128(16, 4, q) +HIGHBD_DC_PREDICTOR_128(16, 8, q) +HIGHBD_DC_PREDICTOR_128(16, 16, q) +HIGHBD_DC_PREDICTOR_128(16, 32, q) +HIGHBD_DC_PREDICTOR_128(16, 64, q) +HIGHBD_DC_PREDICTOR_128(32, 8, q) +HIGHBD_DC_PREDICTOR_128(32, 16, q) +HIGHBD_DC_PREDICTOR_128(32, 32, q) +HIGHBD_DC_PREDICTOR_128(32, 64, q) +HIGHBD_DC_PREDICTOR_128(64, 16, q) +HIGHBD_DC_PREDICTOR_128(64, 32, q) +HIGHBD_DC_PREDICTOR_128(64, 64, q) + +#undef HIGHBD_DC_PREDICTOR_128 + +// ----------------------------------------------------------------------------- +// DC_LEFT + +static INLINE uint32x4_t highbd_dc_load_sum_4(const uint16_t *left) { + const uint16x4_t a = vld1_u16(left); // up to 12 bits + const uint16x4_t b = vpadd_u16(a, a); // up to 13 bits + return vcombine_u32(vpaddl_u16(b), vdup_n_u32(0)); +} + +static INLINE uint32x4_t highbd_dc_load_sum_8(const uint16_t *left) { + return horizontal_add_and_broadcast_long_u16x8(vld1q_u16(left)); +} + +static INLINE uint32x4_t highbd_dc_load_sum_16(const uint16_t *left) { + return horizontal_add_and_broadcast_long_u16x8( + highbd_dc_load_partial_sum_16(left)); +} + +static INLINE uint32x4_t highbd_dc_load_sum_32(const uint16_t *left) { + return horizontal_add_and_broadcast_long_u16x8( + highbd_dc_load_partial_sum_32(left)); +} + +static INLINE uint32x4_t highbd_dc_load_sum_64(const uint16_t *left) { + return horizontal_add_and_broadcast_long_u16x8( + highbd_dc_load_partial_sum_64(left)); +} + +#define DC_PREDICTOR_LEFT(w, h, shift, q) \ + void aom_highbd_dc_left_predictor_##w##x##h##_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)above; \ + (void)bd; \ + const uint32x4_t sum = highbd_dc_load_sum_##h(left); \ + const uint16x4_t dc0 = vrshrn_n_u32(sum, (shift)); \ + highbd_dc_store_##w##xh(dst, stride, (h), vdup##q##_lane_u16(dc0, 0)); \ + } + +DC_PREDICTOR_LEFT(4, 4, 2, ) +DC_PREDICTOR_LEFT(4, 8, 3, ) +DC_PREDICTOR_LEFT(4, 16, 4, ) +DC_PREDICTOR_LEFT(8, 4, 2, q) +DC_PREDICTOR_LEFT(8, 8, 3, q) +DC_PREDICTOR_LEFT(8, 16, 4, q) +DC_PREDICTOR_LEFT(8, 32, 5, q) +DC_PREDICTOR_LEFT(16, 4, 2, q) +DC_PREDICTOR_LEFT(16, 8, 3, q) +DC_PREDICTOR_LEFT(16, 16, 4, q) +DC_PREDICTOR_LEFT(16, 32, 5, q) +DC_PREDICTOR_LEFT(16, 64, 6, q) +DC_PREDICTOR_LEFT(32, 8, 3, q) +DC_PREDICTOR_LEFT(32, 16, 4, q) +DC_PREDICTOR_LEFT(32, 32, 5, q) +DC_PREDICTOR_LEFT(32, 64, 6, q) +DC_PREDICTOR_LEFT(64, 16, 4, q) +DC_PREDICTOR_LEFT(64, 32, 5, q) +DC_PREDICTOR_LEFT(64, 64, 6, q) + +#undef DC_PREDICTOR_LEFT + +// ----------------------------------------------------------------------------- +// DC_TOP + +#define DC_PREDICTOR_TOP(w, h, shift, q) \ + void aom_highbd_dc_top_predictor_##w##x##h##_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + (void)left; \ + const uint32x4_t sum = highbd_dc_load_sum_##w(above); \ + const uint16x4_t dc0 = vrshrn_n_u32(sum, (shift)); \ + highbd_dc_store_##w##xh(dst, stride, (h), vdup##q##_lane_u16(dc0, 0)); \ + } + +DC_PREDICTOR_TOP(4, 4, 2, ) +DC_PREDICTOR_TOP(4, 8, 2, ) +DC_PREDICTOR_TOP(4, 16, 2, ) +DC_PREDICTOR_TOP(8, 4, 3, q) +DC_PREDICTOR_TOP(8, 8, 3, q) +DC_PREDICTOR_TOP(8, 16, 3, q) +DC_PREDICTOR_TOP(8, 32, 3, q) +DC_PREDICTOR_TOP(16, 4, 4, q) +DC_PREDICTOR_TOP(16, 8, 4, q) +DC_PREDICTOR_TOP(16, 16, 4, q) +DC_PREDICTOR_TOP(16, 32, 4, q) +DC_PREDICTOR_TOP(16, 64, 4, q) +DC_PREDICTOR_TOP(32, 8, 5, q) +DC_PREDICTOR_TOP(32, 16, 5, q) +DC_PREDICTOR_TOP(32, 32, 5, q) +DC_PREDICTOR_TOP(32, 64, 5, q) +DC_PREDICTOR_TOP(64, 16, 6, q) +DC_PREDICTOR_TOP(64, 32, 6, q) +DC_PREDICTOR_TOP(64, 64, 6, q) + +#undef DC_PREDICTOR_TOP + +// ----------------------------------------------------------------------------- +// V_PRED + +#define HIGHBD_V_NXM(W, H) \ + void aom_highbd_v_predictor_##W##x##H##_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)left; \ + (void)bd; \ + vertical##W##xh_neon(dst, stride, above, H); \ + } + +static INLINE uint16x8x2_t load_uint16x8x2(uint16_t const *ptr) { + uint16x8x2_t x; + // Clang/gcc uses ldp here. + x.val[0] = vld1q_u16(ptr); + x.val[1] = vld1q_u16(ptr + 8); + return x; +} + +static INLINE void store_uint16x8x2(uint16_t *ptr, uint16x8x2_t x) { + vst1q_u16(ptr, x.val[0]); + vst1q_u16(ptr + 8, x.val[1]); +} + +static INLINE void vertical4xh_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *const above, int height) { + const uint16x4_t row = vld1_u16(above); + int y = height; + do { + vst1_u16(dst, row); + vst1_u16(dst + stride, row); + dst += stride << 1; + y -= 2; + } while (y != 0); +} + +static INLINE void vertical8xh_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *const above, int height) { + const uint16x8_t row = vld1q_u16(above); + int y = height; + do { + vst1q_u16(dst, row); + vst1q_u16(dst + stride, row); + dst += stride << 1; + y -= 2; + } while (y != 0); +} + +static INLINE void vertical16xh_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *const above, int height) { + const uint16x8x2_t row = load_uint16x8x2(above); + int y = height; + do { + store_uint16x8x2(dst, row); + store_uint16x8x2(dst + stride, row); + dst += stride << 1; + y -= 2; + } while (y != 0); +} + +static INLINE uint16x8x4_t load_uint16x8x4(uint16_t const *ptr) { + uint16x8x4_t x; + // Clang/gcc uses ldp here. + x.val[0] = vld1q_u16(ptr); + x.val[1] = vld1q_u16(ptr + 8); + x.val[2] = vld1q_u16(ptr + 16); + x.val[3] = vld1q_u16(ptr + 24); + return x; +} + +static INLINE void store_uint16x8x4(uint16_t *ptr, uint16x8x4_t x) { + vst1q_u16(ptr, x.val[0]); + vst1q_u16(ptr + 8, x.val[1]); + vst1q_u16(ptr + 16, x.val[2]); + vst1q_u16(ptr + 24, x.val[3]); +} + +static INLINE void vertical32xh_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *const above, int height) { + const uint16x8x4_t row = load_uint16x8x4(above); + int y = height; + do { + store_uint16x8x4(dst, row); + store_uint16x8x4(dst + stride, row); + dst += stride << 1; + y -= 2; + } while (y != 0); +} + +static INLINE void vertical64xh_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *const above, int height) { + uint16_t *dst32 = dst + 32; + const uint16x8x4_t row = load_uint16x8x4(above); + const uint16x8x4_t row32 = load_uint16x8x4(above + 32); + int y = height; + do { + store_uint16x8x4(dst, row); + store_uint16x8x4(dst32, row32); + store_uint16x8x4(dst + stride, row); + store_uint16x8x4(dst32 + stride, row32); + dst += stride << 1; + dst32 += stride << 1; + y -= 2; + } while (y != 0); +} + +HIGHBD_V_NXM(4, 4) +HIGHBD_V_NXM(4, 8) +HIGHBD_V_NXM(4, 16) + +HIGHBD_V_NXM(8, 4) +HIGHBD_V_NXM(8, 8) +HIGHBD_V_NXM(8, 16) +HIGHBD_V_NXM(8, 32) + +HIGHBD_V_NXM(16, 4) +HIGHBD_V_NXM(16, 8) +HIGHBD_V_NXM(16, 16) +HIGHBD_V_NXM(16, 32) +HIGHBD_V_NXM(16, 64) + +HIGHBD_V_NXM(32, 8) +HIGHBD_V_NXM(32, 16) +HIGHBD_V_NXM(32, 32) +HIGHBD_V_NXM(32, 64) + +HIGHBD_V_NXM(64, 16) +HIGHBD_V_NXM(64, 32) +HIGHBD_V_NXM(64, 64) + +// ----------------------------------------------------------------------------- +// H_PRED + +static INLINE void highbd_h_store_4x4(uint16_t *dst, ptrdiff_t stride, + uint16x4_t left) { + vst1_u16(dst + 0 * stride, vdup_lane_u16(left, 0)); + vst1_u16(dst + 1 * stride, vdup_lane_u16(left, 1)); + vst1_u16(dst + 2 * stride, vdup_lane_u16(left, 2)); + vst1_u16(dst + 3 * stride, vdup_lane_u16(left, 3)); +} + +static INLINE void highbd_h_store_8x4(uint16_t *dst, ptrdiff_t stride, + uint16x4_t left) { + vst1q_u16(dst + 0 * stride, vdupq_lane_u16(left, 0)); + vst1q_u16(dst + 1 * stride, vdupq_lane_u16(left, 1)); + vst1q_u16(dst + 2 * stride, vdupq_lane_u16(left, 2)); + vst1q_u16(dst + 3 * stride, vdupq_lane_u16(left, 3)); +} + +static INLINE void highbd_h_store_16x1(uint16_t *dst, uint16x8_t left) { + vst1q_u16(dst + 0, left); + vst1q_u16(dst + 8, left); +} + +static INLINE void highbd_h_store_16x4(uint16_t *dst, ptrdiff_t stride, + uint16x4_t left) { + highbd_h_store_16x1(dst + 0 * stride, vdupq_lane_u16(left, 0)); + highbd_h_store_16x1(dst + 1 * stride, vdupq_lane_u16(left, 1)); + highbd_h_store_16x1(dst + 2 * stride, vdupq_lane_u16(left, 2)); + highbd_h_store_16x1(dst + 3 * stride, vdupq_lane_u16(left, 3)); +} + +static INLINE void highbd_h_store_32x1(uint16_t *dst, uint16x8_t left) { + vst1q_u16(dst + 0, left); + vst1q_u16(dst + 8, left); + vst1q_u16(dst + 16, left); + vst1q_u16(dst + 24, left); +} + +static INLINE void highbd_h_store_32x4(uint16_t *dst, ptrdiff_t stride, + uint16x4_t left) { + highbd_h_store_32x1(dst + 0 * stride, vdupq_lane_u16(left, 0)); + highbd_h_store_32x1(dst + 1 * stride, vdupq_lane_u16(left, 1)); + highbd_h_store_32x1(dst + 2 * stride, vdupq_lane_u16(left, 2)); + highbd_h_store_32x1(dst + 3 * stride, vdupq_lane_u16(left, 3)); +} + +static INLINE void highbd_h_store_64x1(uint16_t *dst, uint16x8_t left) { + vst1q_u16(dst + 0, left); + vst1q_u16(dst + 8, left); + vst1q_u16(dst + 16, left); + vst1q_u16(dst + 24, left); + vst1q_u16(dst + 32, left); + vst1q_u16(dst + 40, left); + vst1q_u16(dst + 48, left); + vst1q_u16(dst + 56, left); +} + +static INLINE void highbd_h_store_64x4(uint16_t *dst, ptrdiff_t stride, + uint16x4_t left) { + highbd_h_store_64x1(dst + 0 * stride, vdupq_lane_u16(left, 0)); + highbd_h_store_64x1(dst + 1 * stride, vdupq_lane_u16(left, 1)); + highbd_h_store_64x1(dst + 2 * stride, vdupq_lane_u16(left, 2)); + highbd_h_store_64x1(dst + 3 * stride, vdupq_lane_u16(left, 3)); +} + +void aom_highbd_h_predictor_4x4_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, int bd) { + (void)above; + (void)bd; + highbd_h_store_4x4(dst, stride, vld1_u16(left)); +} + +void aom_highbd_h_predictor_4x8_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, int bd) { + (void)above; + (void)bd; + uint16x8_t l = vld1q_u16(left); + highbd_h_store_4x4(dst + 0 * stride, stride, vget_low_u16(l)); + highbd_h_store_4x4(dst + 4 * stride, stride, vget_high_u16(l)); +} + +void aom_highbd_h_predictor_8x4_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, int bd) { + (void)above; + (void)bd; + highbd_h_store_8x4(dst, stride, vld1_u16(left)); +} + +void aom_highbd_h_predictor_8x8_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, int bd) { + (void)above; + (void)bd; + uint16x8_t l = vld1q_u16(left); + highbd_h_store_8x4(dst + 0 * stride, stride, vget_low_u16(l)); + highbd_h_store_8x4(dst + 4 * stride, stride, vget_high_u16(l)); +} + +void aom_highbd_h_predictor_16x4_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, int bd) { + (void)above; + (void)bd; + highbd_h_store_16x4(dst, stride, vld1_u16(left)); +} + +void aom_highbd_h_predictor_16x8_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, int bd) { + (void)above; + (void)bd; + uint16x8_t l = vld1q_u16(left); + highbd_h_store_16x4(dst + 0 * stride, stride, vget_low_u16(l)); + highbd_h_store_16x4(dst + 4 * stride, stride, vget_high_u16(l)); +} + +void aom_highbd_h_predictor_32x8_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, int bd) { + (void)above; + (void)bd; + uint16x8_t l = vld1q_u16(left); + highbd_h_store_32x4(dst + 0 * stride, stride, vget_low_u16(l)); + highbd_h_store_32x4(dst + 4 * stride, stride, vget_high_u16(l)); +} + +// For cases where height >= 16 we use pairs of loads to get LDP instructions. +#define HIGHBD_H_WXH_LARGE(w, h) \ + void aom_highbd_h_predictor_##w##x##h##_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)above; \ + (void)bd; \ + for (int i = 0; i < (h) / 16; ++i) { \ + uint16x8_t l0 = vld1q_u16(left + 0); \ + uint16x8_t l1 = vld1q_u16(left + 8); \ + highbd_h_store_##w##x4(dst + 0 * stride, stride, vget_low_u16(l0)); \ + highbd_h_store_##w##x4(dst + 4 * stride, stride, vget_high_u16(l0)); \ + highbd_h_store_##w##x4(dst + 8 * stride, stride, vget_low_u16(l1)); \ + highbd_h_store_##w##x4(dst + 12 * stride, stride, vget_high_u16(l1)); \ + left += 16; \ + dst += 16 * stride; \ + } \ + } + +HIGHBD_H_WXH_LARGE(4, 16) +HIGHBD_H_WXH_LARGE(8, 16) +HIGHBD_H_WXH_LARGE(8, 32) +HIGHBD_H_WXH_LARGE(16, 16) +HIGHBD_H_WXH_LARGE(16, 32) +HIGHBD_H_WXH_LARGE(16, 64) +HIGHBD_H_WXH_LARGE(32, 16) +HIGHBD_H_WXH_LARGE(32, 32) +HIGHBD_H_WXH_LARGE(32, 64) +HIGHBD_H_WXH_LARGE(64, 16) +HIGHBD_H_WXH_LARGE(64, 32) +HIGHBD_H_WXH_LARGE(64, 64) + +#undef HIGHBD_H_WXH_LARGE + +// ----------------------------------------------------------------------------- +// PAETH + +static INLINE void highbd_paeth_4or8_x_h_neon(uint16_t *dest, ptrdiff_t stride, + const uint16_t *const top_row, + const uint16_t *const left_column, + int width, int height) { + const uint16x8_t top_left = vdupq_n_u16(top_row[-1]); + const uint16x8_t top_left_x2 = vdupq_n_u16(top_row[-1] + top_row[-1]); + uint16x8_t top; + if (width == 4) { + top = vcombine_u16(vld1_u16(top_row), vdup_n_u16(0)); + } else { // width == 8 + top = vld1q_u16(top_row); + } + + for (int y = 0; y < height; ++y) { + const uint16x8_t left = vdupq_n_u16(left_column[y]); + + const uint16x8_t left_dist = vabdq_u16(top, top_left); + const uint16x8_t top_dist = vabdq_u16(left, top_left); + const uint16x8_t top_left_dist = + vabdq_u16(vaddq_u16(top, left), top_left_x2); + + const uint16x8_t left_le_top = vcleq_u16(left_dist, top_dist); + const uint16x8_t left_le_top_left = vcleq_u16(left_dist, top_left_dist); + const uint16x8_t top_le_top_left = vcleq_u16(top_dist, top_left_dist); + + // if (left_dist <= top_dist && left_dist <= top_left_dist) + const uint16x8_t left_mask = vandq_u16(left_le_top, left_le_top_left); + // dest[x] = left_column[y]; + // Fill all the unused spaces with 'top'. They will be overwritten when + // the positions for top_left are known. + uint16x8_t result = vbslq_u16(left_mask, left, top); + // else if (top_dist <= top_left_dist) + // dest[x] = top_row[x]; + // Add these values to the mask. They were already set. + const uint16x8_t left_or_top_mask = vorrq_u16(left_mask, top_le_top_left); + // else + // dest[x] = top_left; + result = vbslq_u16(left_or_top_mask, result, top_left); + + if (width == 4) { + vst1_u16(dest, vget_low_u16(result)); + } else { // width == 8 + vst1q_u16(dest, result); + } + dest += stride; + } +} + +#define HIGHBD_PAETH_NXM(W, H) \ + void aom_highbd_paeth_predictor_##W##x##H##_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + highbd_paeth_4or8_x_h_neon(dst, stride, above, left, W, H); \ + } + +HIGHBD_PAETH_NXM(4, 4) +HIGHBD_PAETH_NXM(4, 8) +HIGHBD_PAETH_NXM(4, 16) +HIGHBD_PAETH_NXM(8, 4) +HIGHBD_PAETH_NXM(8, 8) +HIGHBD_PAETH_NXM(8, 16) +HIGHBD_PAETH_NXM(8, 32) + +// Select the closest values and collect them. +static INLINE uint16x8_t select_paeth(const uint16x8_t top, + const uint16x8_t left, + const uint16x8_t top_left, + const uint16x8_t left_le_top, + const uint16x8_t left_le_top_left, + const uint16x8_t top_le_top_left) { + // if (left_dist <= top_dist && left_dist <= top_left_dist) + const uint16x8_t left_mask = vandq_u16(left_le_top, left_le_top_left); + // dest[x] = left_column[y]; + // Fill all the unused spaces with 'top'. They will be overwritten when + // the positions for top_left are known. + const uint16x8_t result = vbslq_u16(left_mask, left, top); + // else if (top_dist <= top_left_dist) + // dest[x] = top_row[x]; + // Add these values to the mask. They were already set. + const uint16x8_t left_or_top_mask = vorrq_u16(left_mask, top_le_top_left); + // else + // dest[x] = top_left; + return vbslq_u16(left_or_top_mask, result, top_left); +} + +#define PAETH_PREDICTOR(num) \ + do { \ + const uint16x8_t left_dist = vabdq_u16(top[num], top_left); \ + const uint16x8_t top_left_dist = \ + vabdq_u16(vaddq_u16(top[num], left), top_left_x2); \ + const uint16x8_t left_le_top = vcleq_u16(left_dist, top_dist); \ + const uint16x8_t left_le_top_left = vcleq_u16(left_dist, top_left_dist); \ + const uint16x8_t top_le_top_left = vcleq_u16(top_dist, top_left_dist); \ + const uint16x8_t result = \ + select_paeth(top[num], left, top_left, left_le_top, left_le_top_left, \ + top_le_top_left); \ + vst1q_u16(dest + (num * 8), result); \ + } while (0) + +#define LOAD_TOP_ROW(num) vld1q_u16(top_row + (num * 8)) + +static INLINE void highbd_paeth16_plus_x_h_neon( + uint16_t *dest, ptrdiff_t stride, const uint16_t *const top_row, + const uint16_t *const left_column, int width, int height) { + const uint16x8_t top_left = vdupq_n_u16(top_row[-1]); + const uint16x8_t top_left_x2 = vdupq_n_u16(top_row[-1] + top_row[-1]); + uint16x8_t top[8]; + top[0] = LOAD_TOP_ROW(0); + top[1] = LOAD_TOP_ROW(1); + if (width > 16) { + top[2] = LOAD_TOP_ROW(2); + top[3] = LOAD_TOP_ROW(3); + if (width == 64) { + top[4] = LOAD_TOP_ROW(4); + top[5] = LOAD_TOP_ROW(5); + top[6] = LOAD_TOP_ROW(6); + top[7] = LOAD_TOP_ROW(7); + } + } + + for (int y = 0; y < height; ++y) { + const uint16x8_t left = vdupq_n_u16(left_column[y]); + const uint16x8_t top_dist = vabdq_u16(left, top_left); + PAETH_PREDICTOR(0); + PAETH_PREDICTOR(1); + if (width > 16) { + PAETH_PREDICTOR(2); + PAETH_PREDICTOR(3); + if (width == 64) { + PAETH_PREDICTOR(4); + PAETH_PREDICTOR(5); + PAETH_PREDICTOR(6); + PAETH_PREDICTOR(7); + } + } + dest += stride; + } +} + +#define HIGHBD_PAETH_NXM_WIDE(W, H) \ + void aom_highbd_paeth_predictor_##W##x##H##_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + highbd_paeth16_plus_x_h_neon(dst, stride, above, left, W, H); \ + } + +HIGHBD_PAETH_NXM_WIDE(16, 4) +HIGHBD_PAETH_NXM_WIDE(16, 8) +HIGHBD_PAETH_NXM_WIDE(16, 16) +HIGHBD_PAETH_NXM_WIDE(16, 32) +HIGHBD_PAETH_NXM_WIDE(16, 64) +HIGHBD_PAETH_NXM_WIDE(32, 8) +HIGHBD_PAETH_NXM_WIDE(32, 16) +HIGHBD_PAETH_NXM_WIDE(32, 32) +HIGHBD_PAETH_NXM_WIDE(32, 64) +HIGHBD_PAETH_NXM_WIDE(64, 16) +HIGHBD_PAETH_NXM_WIDE(64, 32) +HIGHBD_PAETH_NXM_WIDE(64, 64) + +// ----------------------------------------------------------------------------- +// SMOOTH + +// 256 - v = vneg_s8(v) +static INLINE uint16x4_t negate_s8(const uint16x4_t v) { + return vreinterpret_u16_s8(vneg_s8(vreinterpret_s8_u16(v))); +} + +static INLINE void highbd_smooth_4xh_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *const top_row, + const uint16_t *const left_column, + const int height) { + const uint16_t top_right = top_row[3]; + const uint16_t bottom_left = left_column[height - 1]; + const uint16_t *const weights_y = smooth_weights_u16 + height - 4; + + const uint16x4_t top_v = vld1_u16(top_row); + const uint16x4_t bottom_left_v = vdup_n_u16(bottom_left); + const uint16x4_t weights_x_v = vld1_u16(smooth_weights_u16); + const uint16x4_t scaled_weights_x = negate_s8(weights_x_v); + const uint32x4_t weighted_tr = vmull_n_u16(scaled_weights_x, top_right); + + for (int y = 0; y < height; ++y) { + // Each variable in the running summation is named for the last item to be + // accumulated. + const uint32x4_t weighted_top = + vmlal_n_u16(weighted_tr, top_v, weights_y[y]); + const uint32x4_t weighted_left = + vmlal_n_u16(weighted_top, weights_x_v, left_column[y]); + const uint32x4_t weighted_bl = + vmlal_n_u16(weighted_left, bottom_left_v, 256 - weights_y[y]); + + const uint16x4_t pred = + vrshrn_n_u32(weighted_bl, SMOOTH_WEIGHT_LOG2_SCALE + 1); + vst1_u16(dst, pred); + dst += stride; + } +} + +// Common code between 8xH and [16|32|64]xH. +static INLINE void highbd_calculate_pred8( + uint16_t *dst, const uint32x4_t weighted_corners_low, + const uint32x4_t weighted_corners_high, const uint16x4x2_t top_vals, + const uint16x4x2_t weights_x, const uint16_t left_y, + const uint16_t weight_y) { + // Each variable in the running summation is named for the last item to be + // accumulated. + const uint32x4_t weighted_top_low = + vmlal_n_u16(weighted_corners_low, top_vals.val[0], weight_y); + const uint32x4_t weighted_edges_low = + vmlal_n_u16(weighted_top_low, weights_x.val[0], left_y); + + const uint16x4_t pred_low = + vrshrn_n_u32(weighted_edges_low, SMOOTH_WEIGHT_LOG2_SCALE + 1); + vst1_u16(dst, pred_low); + + const uint32x4_t weighted_top_high = + vmlal_n_u16(weighted_corners_high, top_vals.val[1], weight_y); + const uint32x4_t weighted_edges_high = + vmlal_n_u16(weighted_top_high, weights_x.val[1], left_y); + + const uint16x4_t pred_high = + vrshrn_n_u32(weighted_edges_high, SMOOTH_WEIGHT_LOG2_SCALE + 1); + vst1_u16(dst + 4, pred_high); +} + +static void highbd_smooth_8xh_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *const top_row, + const uint16_t *const left_column, + const int height) { + const uint16_t top_right = top_row[7]; + const uint16_t bottom_left = left_column[height - 1]; + const uint16_t *const weights_y = smooth_weights_u16 + height - 4; + + const uint16x4x2_t top_vals = { { vld1_u16(top_row), + vld1_u16(top_row + 4) } }; + const uint16x4_t bottom_left_v = vdup_n_u16(bottom_left); + const uint16x4x2_t weights_x = { { vld1_u16(smooth_weights_u16 + 4), + vld1_u16(smooth_weights_u16 + 8) } }; + const uint32x4_t weighted_tr_low = + vmull_n_u16(negate_s8(weights_x.val[0]), top_right); + const uint32x4_t weighted_tr_high = + vmull_n_u16(negate_s8(weights_x.val[1]), top_right); + + for (int y = 0; y < height; ++y) { + const uint32x4_t weighted_bl = + vmull_n_u16(bottom_left_v, 256 - weights_y[y]); + const uint32x4_t weighted_corners_low = + vaddq_u32(weighted_bl, weighted_tr_low); + const uint32x4_t weighted_corners_high = + vaddq_u32(weighted_bl, weighted_tr_high); + highbd_calculate_pred8(dst, weighted_corners_low, weighted_corners_high, + top_vals, weights_x, left_column[y], weights_y[y]); + dst += stride; + } +} + +#define HIGHBD_SMOOTH_NXM(W, H) \ + void aom_highbd_smooth_predictor_##W##x##H##_neon( \ + uint16_t *dst, ptrdiff_t y_stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + highbd_smooth_##W##xh_neon(dst, y_stride, above, left, H); \ + } + +HIGHBD_SMOOTH_NXM(4, 4) +HIGHBD_SMOOTH_NXM(4, 8) +HIGHBD_SMOOTH_NXM(8, 4) +HIGHBD_SMOOTH_NXM(8, 8) +HIGHBD_SMOOTH_NXM(4, 16) +HIGHBD_SMOOTH_NXM(8, 16) +HIGHBD_SMOOTH_NXM(8, 32) + +#undef HIGHBD_SMOOTH_NXM + +// For width 16 and above. +#define HIGHBD_SMOOTH_PREDICTOR(W) \ + static void highbd_smooth_##W##xh_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *const top_row, \ + const uint16_t *const left_column, const int height) { \ + const uint16_t top_right = top_row[(W)-1]; \ + const uint16_t bottom_left = left_column[height - 1]; \ + const uint16_t *const weights_y = smooth_weights_u16 + height - 4; \ + \ + /* Precompute weighted values that don't vary with |y|. */ \ + uint32x4_t weighted_tr_low[(W) >> 3]; \ + uint32x4_t weighted_tr_high[(W) >> 3]; \ + for (int i = 0; i < (W) >> 3; ++i) { \ + const int x = i << 3; \ + const uint16x4_t weights_x_low = \ + vld1_u16(smooth_weights_u16 + (W)-4 + x); \ + weighted_tr_low[i] = vmull_n_u16(negate_s8(weights_x_low), top_right); \ + const uint16x4_t weights_x_high = \ + vld1_u16(smooth_weights_u16 + (W) + x); \ + weighted_tr_high[i] = vmull_n_u16(negate_s8(weights_x_high), top_right); \ + } \ + \ + const uint16x4_t bottom_left_v = vdup_n_u16(bottom_left); \ + for (int y = 0; y < height; ++y) { \ + const uint32x4_t weighted_bl = \ + vmull_n_u16(bottom_left_v, 256 - weights_y[y]); \ + uint16_t *dst_x = dst; \ + for (int i = 0; i < (W) >> 3; ++i) { \ + const int x = i << 3; \ + const uint16x4x2_t top_vals = { { vld1_u16(top_row + x), \ + vld1_u16(top_row + x + 4) } }; \ + const uint32x4_t weighted_corners_low = \ + vaddq_u32(weighted_bl, weighted_tr_low[i]); \ + const uint32x4_t weighted_corners_high = \ + vaddq_u32(weighted_bl, weighted_tr_high[i]); \ + /* Accumulate weighted edge values and store. */ \ + const uint16x4x2_t weights_x = { \ + { vld1_u16(smooth_weights_u16 + (W)-4 + x), \ + vld1_u16(smooth_weights_u16 + (W) + x) } \ + }; \ + highbd_calculate_pred8(dst_x, weighted_corners_low, \ + weighted_corners_high, top_vals, weights_x, \ + left_column[y], weights_y[y]); \ + dst_x += 8; \ + } \ + dst += stride; \ + } \ + } + +HIGHBD_SMOOTH_PREDICTOR(16) +HIGHBD_SMOOTH_PREDICTOR(32) +HIGHBD_SMOOTH_PREDICTOR(64) + +#undef HIGHBD_SMOOTH_PREDICTOR + +#define HIGHBD_SMOOTH_NXM_WIDE(W, H) \ + void aom_highbd_smooth_predictor_##W##x##H##_neon( \ + uint16_t *dst, ptrdiff_t y_stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + highbd_smooth_##W##xh_neon(dst, y_stride, above, left, H); \ + } + +HIGHBD_SMOOTH_NXM_WIDE(16, 4) +HIGHBD_SMOOTH_NXM_WIDE(16, 8) +HIGHBD_SMOOTH_NXM_WIDE(16, 16) +HIGHBD_SMOOTH_NXM_WIDE(16, 32) +HIGHBD_SMOOTH_NXM_WIDE(16, 64) +HIGHBD_SMOOTH_NXM_WIDE(32, 8) +HIGHBD_SMOOTH_NXM_WIDE(32, 16) +HIGHBD_SMOOTH_NXM_WIDE(32, 32) +HIGHBD_SMOOTH_NXM_WIDE(32, 64) +HIGHBD_SMOOTH_NXM_WIDE(64, 16) +HIGHBD_SMOOTH_NXM_WIDE(64, 32) +HIGHBD_SMOOTH_NXM_WIDE(64, 64) + +#undef HIGHBD_SMOOTH_NXM_WIDE + +static void highbd_smooth_v_4xh_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *const top_row, + const uint16_t *const left_column, + const int height) { + const uint16_t bottom_left = left_column[height - 1]; + const uint16_t *const weights_y = smooth_weights_u16 + height - 4; + + const uint16x4_t top_v = vld1_u16(top_row); + const uint16x4_t bottom_left_v = vdup_n_u16(bottom_left); + + for (int y = 0; y < height; ++y) { + const uint32x4_t weighted_bl = + vmull_n_u16(bottom_left_v, 256 - weights_y[y]); + const uint32x4_t weighted_top = + vmlal_n_u16(weighted_bl, top_v, weights_y[y]); + vst1_u16(dst, vrshrn_n_u32(weighted_top, SMOOTH_WEIGHT_LOG2_SCALE)); + + dst += stride; + } +} + +static void highbd_smooth_v_8xh_neon(uint16_t *dst, const ptrdiff_t stride, + const uint16_t *const top_row, + const uint16_t *const left_column, + const int height) { + const uint16_t bottom_left = left_column[height - 1]; + const uint16_t *const weights_y = smooth_weights_u16 + height - 4; + + const uint16x4_t top_low = vld1_u16(top_row); + const uint16x4_t top_high = vld1_u16(top_row + 4); + const uint16x4_t bottom_left_v = vdup_n_u16(bottom_left); + + for (int y = 0; y < height; ++y) { + const uint32x4_t weighted_bl = + vmull_n_u16(bottom_left_v, 256 - weights_y[y]); + + const uint32x4_t weighted_top_low = + vmlal_n_u16(weighted_bl, top_low, weights_y[y]); + vst1_u16(dst, vrshrn_n_u32(weighted_top_low, SMOOTH_WEIGHT_LOG2_SCALE)); + + const uint32x4_t weighted_top_high = + vmlal_n_u16(weighted_bl, top_high, weights_y[y]); + vst1_u16(dst + 4, + vrshrn_n_u32(weighted_top_high, SMOOTH_WEIGHT_LOG2_SCALE)); + dst += stride; + } +} + +#define HIGHBD_SMOOTH_V_NXM(W, H) \ + void aom_highbd_smooth_v_predictor_##W##x##H##_neon( \ + uint16_t *dst, ptrdiff_t y_stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + highbd_smooth_v_##W##xh_neon(dst, y_stride, above, left, H); \ + } + +HIGHBD_SMOOTH_V_NXM(4, 4) +HIGHBD_SMOOTH_V_NXM(4, 8) +HIGHBD_SMOOTH_V_NXM(4, 16) +HIGHBD_SMOOTH_V_NXM(8, 4) +HIGHBD_SMOOTH_V_NXM(8, 8) +HIGHBD_SMOOTH_V_NXM(8, 16) +HIGHBD_SMOOTH_V_NXM(8, 32) + +#undef HIGHBD_SMOOTH_V_NXM + +// For width 16 and above. +#define HIGHBD_SMOOTH_V_PREDICTOR(W) \ + static void highbd_smooth_v_##W##xh_neon( \ + uint16_t *dst, const ptrdiff_t stride, const uint16_t *const top_row, \ + const uint16_t *const left_column, const int height) { \ + const uint16_t bottom_left = left_column[height - 1]; \ + const uint16_t *const weights_y = smooth_weights_u16 + height - 4; \ + \ + uint16x4x2_t top_vals[(W) >> 3]; \ + for (int i = 0; i < (W) >> 3; ++i) { \ + const int x = i << 3; \ + top_vals[i].val[0] = vld1_u16(top_row + x); \ + top_vals[i].val[1] = vld1_u16(top_row + x + 4); \ + } \ + \ + const uint16x4_t bottom_left_v = vdup_n_u16(bottom_left); \ + for (int y = 0; y < height; ++y) { \ + const uint32x4_t weighted_bl = \ + vmull_n_u16(bottom_left_v, 256 - weights_y[y]); \ + \ + uint16_t *dst_x = dst; \ + for (int i = 0; i < (W) >> 3; ++i) { \ + const uint32x4_t weighted_top_low = \ + vmlal_n_u16(weighted_bl, top_vals[i].val[0], weights_y[y]); \ + vst1_u16(dst_x, \ + vrshrn_n_u32(weighted_top_low, SMOOTH_WEIGHT_LOG2_SCALE)); \ + \ + const uint32x4_t weighted_top_high = \ + vmlal_n_u16(weighted_bl, top_vals[i].val[1], weights_y[y]); \ + vst1_u16(dst_x + 4, \ + vrshrn_n_u32(weighted_top_high, SMOOTH_WEIGHT_LOG2_SCALE)); \ + dst_x += 8; \ + } \ + dst += stride; \ + } \ + } + +HIGHBD_SMOOTH_V_PREDICTOR(16) +HIGHBD_SMOOTH_V_PREDICTOR(32) +HIGHBD_SMOOTH_V_PREDICTOR(64) + +#undef HIGHBD_SMOOTH_V_PREDICTOR + +#define HIGHBD_SMOOTH_V_NXM_WIDE(W, H) \ + void aom_highbd_smooth_v_predictor_##W##x##H##_neon( \ + uint16_t *dst, ptrdiff_t y_stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + highbd_smooth_v_##W##xh_neon(dst, y_stride, above, left, H); \ + } + +HIGHBD_SMOOTH_V_NXM_WIDE(16, 4) +HIGHBD_SMOOTH_V_NXM_WIDE(16, 8) +HIGHBD_SMOOTH_V_NXM_WIDE(16, 16) +HIGHBD_SMOOTH_V_NXM_WIDE(16, 32) +HIGHBD_SMOOTH_V_NXM_WIDE(16, 64) +HIGHBD_SMOOTH_V_NXM_WIDE(32, 8) +HIGHBD_SMOOTH_V_NXM_WIDE(32, 16) +HIGHBD_SMOOTH_V_NXM_WIDE(32, 32) +HIGHBD_SMOOTH_V_NXM_WIDE(32, 64) +HIGHBD_SMOOTH_V_NXM_WIDE(64, 16) +HIGHBD_SMOOTH_V_NXM_WIDE(64, 32) +HIGHBD_SMOOTH_V_NXM_WIDE(64, 64) + +#undef HIGHBD_SMOOTH_V_NXM_WIDE + +static INLINE void highbd_smooth_h_4xh_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *const top_row, + const uint16_t *const left_column, + const int height) { + const uint16_t top_right = top_row[3]; + + const uint16x4_t weights_x = vld1_u16(smooth_weights_u16); + const uint16x4_t scaled_weights_x = negate_s8(weights_x); + + const uint32x4_t weighted_tr = vmull_n_u16(scaled_weights_x, top_right); + for (int y = 0; y < height; ++y) { + const uint32x4_t weighted_left = + vmlal_n_u16(weighted_tr, weights_x, left_column[y]); + vst1_u16(dst, vrshrn_n_u32(weighted_left, SMOOTH_WEIGHT_LOG2_SCALE)); + dst += stride; + } +} + +static INLINE void highbd_smooth_h_8xh_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *const top_row, + const uint16_t *const left_column, + const int height) { + const uint16_t top_right = top_row[7]; + + const uint16x4x2_t weights_x = { { vld1_u16(smooth_weights_u16 + 4), + vld1_u16(smooth_weights_u16 + 8) } }; + + const uint32x4_t weighted_tr_low = + vmull_n_u16(negate_s8(weights_x.val[0]), top_right); + const uint32x4_t weighted_tr_high = + vmull_n_u16(negate_s8(weights_x.val[1]), top_right); + + for (int y = 0; y < height; ++y) { + const uint16_t left_y = left_column[y]; + const uint32x4_t weighted_left_low = + vmlal_n_u16(weighted_tr_low, weights_x.val[0], left_y); + vst1_u16(dst, vrshrn_n_u32(weighted_left_low, SMOOTH_WEIGHT_LOG2_SCALE)); + + const uint32x4_t weighted_left_high = + vmlal_n_u16(weighted_tr_high, weights_x.val[1], left_y); + vst1_u16(dst + 4, + vrshrn_n_u32(weighted_left_high, SMOOTH_WEIGHT_LOG2_SCALE)); + dst += stride; + } +} + +#define HIGHBD_SMOOTH_H_NXM(W, H) \ + void aom_highbd_smooth_h_predictor_##W##x##H##_neon( \ + uint16_t *dst, ptrdiff_t y_stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + highbd_smooth_h_##W##xh_neon(dst, y_stride, above, left, H); \ + } + +HIGHBD_SMOOTH_H_NXM(4, 4) +HIGHBD_SMOOTH_H_NXM(4, 8) +HIGHBD_SMOOTH_H_NXM(4, 16) +HIGHBD_SMOOTH_H_NXM(8, 4) +HIGHBD_SMOOTH_H_NXM(8, 8) +HIGHBD_SMOOTH_H_NXM(8, 16) +HIGHBD_SMOOTH_H_NXM(8, 32) + +#undef HIGHBD_SMOOTH_H_NXM + +// For width 16 and above. +#define HIGHBD_SMOOTH_H_PREDICTOR(W) \ + void highbd_smooth_h_##W##xh_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *const top_row, \ + const uint16_t *const left_column, const int height) { \ + const uint16_t top_right = top_row[(W)-1]; \ + \ + uint16x4_t weights_x_low[(W) >> 3]; \ + uint16x4_t weights_x_high[(W) >> 3]; \ + uint32x4_t weighted_tr_low[(W) >> 3]; \ + uint32x4_t weighted_tr_high[(W) >> 3]; \ + for (int i = 0; i < (W) >> 3; ++i) { \ + const int x = i << 3; \ + weights_x_low[i] = vld1_u16(smooth_weights_u16 + (W)-4 + x); \ + weighted_tr_low[i] = \ + vmull_n_u16(negate_s8(weights_x_low[i]), top_right); \ + weights_x_high[i] = vld1_u16(smooth_weights_u16 + (W) + x); \ + weighted_tr_high[i] = \ + vmull_n_u16(negate_s8(weights_x_high[i]), top_right); \ + } \ + \ + for (int y = 0; y < height; ++y) { \ + uint16_t *dst_x = dst; \ + const uint16_t left_y = left_column[y]; \ + for (int i = 0; i < (W) >> 3; ++i) { \ + const uint32x4_t weighted_left_low = \ + vmlal_n_u16(weighted_tr_low[i], weights_x_low[i], left_y); \ + vst1_u16(dst_x, \ + vrshrn_n_u32(weighted_left_low, SMOOTH_WEIGHT_LOG2_SCALE)); \ + \ + const uint32x4_t weighted_left_high = \ + vmlal_n_u16(weighted_tr_high[i], weights_x_high[i], left_y); \ + vst1_u16(dst_x + 4, \ + vrshrn_n_u32(weighted_left_high, SMOOTH_WEIGHT_LOG2_SCALE)); \ + dst_x += 8; \ + } \ + dst += stride; \ + } \ + } + +HIGHBD_SMOOTH_H_PREDICTOR(16) +HIGHBD_SMOOTH_H_PREDICTOR(32) +HIGHBD_SMOOTH_H_PREDICTOR(64) + +#undef HIGHBD_SMOOTH_H_PREDICTOR + +#define HIGHBD_SMOOTH_H_NXM_WIDE(W, H) \ + void aom_highbd_smooth_h_predictor_##W##x##H##_neon( \ + uint16_t *dst, ptrdiff_t y_stride, const uint16_t *above, \ + const uint16_t *left, int bd) { \ + (void)bd; \ + highbd_smooth_h_##W##xh_neon(dst, y_stride, above, left, H); \ + } + +HIGHBD_SMOOTH_H_NXM_WIDE(16, 4) +HIGHBD_SMOOTH_H_NXM_WIDE(16, 8) +HIGHBD_SMOOTH_H_NXM_WIDE(16, 16) +HIGHBD_SMOOTH_H_NXM_WIDE(16, 32) +HIGHBD_SMOOTH_H_NXM_WIDE(16, 64) +HIGHBD_SMOOTH_H_NXM_WIDE(32, 8) +HIGHBD_SMOOTH_H_NXM_WIDE(32, 16) +HIGHBD_SMOOTH_H_NXM_WIDE(32, 32) +HIGHBD_SMOOTH_H_NXM_WIDE(32, 64) +HIGHBD_SMOOTH_H_NXM_WIDE(64, 16) +HIGHBD_SMOOTH_H_NXM_WIDE(64, 32) +HIGHBD_SMOOTH_H_NXM_WIDE(64, 64) + +#undef HIGHBD_SMOOTH_H_NXM_WIDE + +// ----------------------------------------------------------------------------- +// Z1 + +static int16_t iota1_s16[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 }; +static int16_t iota2_s16[] = { 0, 2, 4, 6, 8, 10, 12, 14 }; + +static AOM_FORCE_INLINE uint16x4_t highbd_dr_z1_apply_shift_x4(uint16x4_t a0, + uint16x4_t a1, + int shift) { + // The C implementation of the z1 predictor uses (32 - shift) and a right + // shift by 5, however we instead double shift to avoid an unnecessary right + // shift by 1. + uint32x4_t res = vmull_n_u16(a1, shift); + res = vmlal_n_u16(res, a0, 64 - shift); + return vrshrn_n_u32(res, 6); +} + +static AOM_FORCE_INLINE uint16x8_t highbd_dr_z1_apply_shift_x8(uint16x8_t a0, + uint16x8_t a1, + int shift) { + return vcombine_u16( + highbd_dr_z1_apply_shift_x4(vget_low_u16(a0), vget_low_u16(a1), shift), + highbd_dr_z1_apply_shift_x4(vget_high_u16(a0), vget_high_u16(a1), shift)); +} + +static void highbd_dr_prediction_z1_upsample0_neon(uint16_t *dst, + ptrdiff_t stride, int bw, + int bh, + const uint16_t *above, + int dx) { + assert(bw % 4 == 0); + assert(bh % 4 == 0); + assert(dx > 0); + + const int max_base_x = (bw + bh) - 1; + const int above_max = above[max_base_x]; + + const int16x8_t iota1x8 = vld1q_s16(iota1_s16); + const int16x4_t iota1x4 = vget_low_s16(iota1x8); + + int x = dx; + int r = 0; + do { + const int base = x >> 6; + if (base >= max_base_x) { + for (int i = r; i < bh; ++i) { + aom_memset16(dst, above_max, bw); + dst += stride; + } + return; + } + + // The C implementation of the z1 predictor when not upsampling uses: + // ((x & 0x3f) >> 1) + // The right shift is unnecessary here since we instead shift by +1 later, + // so adjust the mask to 0x3e to ensure we don't consider the extra bit. + const int shift = x & 0x3e; + + if (bw == 4) { + const uint16x4_t a0 = vld1_u16(&above[base]); + const uint16x4_t a1 = vld1_u16(&above[base + 1]); + const uint16x4_t val = highbd_dr_z1_apply_shift_x4(a0, a1, shift); + const uint16x4_t cmp = vcgt_s16(vdup_n_s16(max_base_x - base), iota1x4); + const uint16x4_t res = vbsl_u16(cmp, val, vdup_n_u16(above_max)); + vst1_u16(dst, res); + } else { + int c = 0; + do { + const uint16x8_t a0 = vld1q_u16(&above[base + c]); + const uint16x8_t a1 = vld1q_u16(&above[base + c + 1]); + const uint16x8_t val = highbd_dr_z1_apply_shift_x8(a0, a1, shift); + const uint16x8_t cmp = + vcgtq_s16(vdupq_n_s16(max_base_x - base - c), iota1x8); + const uint16x8_t res = vbslq_u16(cmp, val, vdupq_n_u16(above_max)); + vst1q_u16(dst + c, res); + c += 8; + } while (c < bw); + } + + dst += stride; + x += dx; + } while (++r < bh); +} + +static void highbd_dr_prediction_z1_upsample1_neon(uint16_t *dst, + ptrdiff_t stride, int bw, + int bh, + const uint16_t *above, + int dx) { + assert(bw % 4 == 0); + assert(bh % 4 == 0); + assert(dx > 0); + + const int max_base_x = ((bw + bh) - 1) << 1; + const int above_max = above[max_base_x]; + + const int16x8_t iota2x8 = vld1q_s16(iota2_s16); + const int16x4_t iota2x4 = vget_low_s16(iota2x8); + + int x = dx; + int r = 0; + do { + const int base = x >> 5; + if (base >= max_base_x) { + for (int i = r; i < bh; ++i) { + aom_memset16(dst, above_max, bw); + dst += stride; + } + return; + } + + // The C implementation of the z1 predictor when upsampling uses: + // (((x << 1) & 0x3f) >> 1) + // The right shift is unnecessary here since we instead shift by +1 later, + // so adjust the mask to 0x3e to ensure we don't consider the extra bit. + const int shift = (x << 1) & 0x3e; + + if (bw == 4) { + const uint16x4x2_t a01 = vld2_u16(&above[base]); + const uint16x4_t val = + highbd_dr_z1_apply_shift_x4(a01.val[0], a01.val[1], shift); + const uint16x4_t cmp = vcgt_s16(vdup_n_s16(max_base_x - base), iota2x4); + const uint16x4_t res = vbsl_u16(cmp, val, vdup_n_u16(above_max)); + vst1_u16(dst, res); + } else { + int c = 0; + do { + const uint16x8x2_t a01 = vld2q_u16(&above[base + 2 * c]); + const uint16x8_t val = + highbd_dr_z1_apply_shift_x8(a01.val[0], a01.val[1], shift); + const uint16x8_t cmp = + vcgtq_s16(vdupq_n_s16(max_base_x - base - 2 * c), iota2x8); + const uint16x8_t res = vbslq_u16(cmp, val, vdupq_n_u16(above_max)); + vst1q_u16(dst + c, res); + c += 8; + } while (c < bw); + } + + dst += stride; + x += dx; + } while (++r < bh); +} + +// Directional prediction, zone 1: 0 < angle < 90 +void av1_highbd_dr_prediction_z1_neon(uint16_t *dst, ptrdiff_t stride, int bw, + int bh, const uint16_t *above, + const uint16_t *left, int upsample_above, + int dx, int dy, int bd) { + (void)left; + (void)dy; + (void)bd; + assert(dy == 1); + + if (upsample_above) { + highbd_dr_prediction_z1_upsample1_neon(dst, stride, bw, bh, above, dx); + } else { + highbd_dr_prediction_z1_upsample0_neon(dst, stride, bw, bh, above, dx); + } +} + +// ----------------------------------------------------------------------------- +// Z2 + +#if AOM_ARCH_AARCH64 +// Incrementally shift more elements from `above` into the result, merging with +// existing `left` elements. +// X0, X1, X2, X3 +// Y0, X0, X1, X2 +// Y0, Y1, X0, X1 +// Y0, Y1, Y2, X0 +// Y0, Y1, Y2, Y3 +// clang-format off +static const uint8_t z2_merge_shuffles_u16x4[5][8] = { + { 8, 9, 10, 11, 12, 13, 14, 15 }, + { 0, 1, 8, 9, 10, 11, 12, 13 }, + { 0, 1, 2, 3, 8, 9, 10, 11 }, + { 0, 1, 2, 3, 4, 5, 8, 9 }, + { 0, 1, 2, 3, 4, 5, 6, 7 }, +}; +// clang-format on + +// Incrementally shift more elements from `above` into the result, merging with +// existing `left` elements. +// X0, X1, X2, X3, X4, X5, X6, X7 +// Y0, X0, X1, X2, X3, X4, X5, X6 +// Y0, Y1, X0, X1, X2, X3, X4, X5 +// Y0, Y1, Y2, X0, X1, X2, X3, X4 +// Y0, Y1, Y2, Y3, X0, X1, X2, X3 +// Y0, Y1, Y2, Y3, Y4, X0, X1, X2 +// Y0, Y1, Y2, Y3, Y4, Y5, X0, X1 +// Y0, Y1, Y2, Y3, Y4, Y5, Y6, X0 +// Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7 +// clang-format off +static const uint8_t z2_merge_shuffles_u16x8[9][16] = { + { 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 }, + { 0, 1, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 }, + { 0, 1, 2, 3, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 }, + { 0, 1, 2, 3, 4, 5, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 }, + { 0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 23 }, + { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 16, 17, 18, 19, 20, 21 }, + { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 16, 17, 18, 19 }, + { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 17 }, + { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }, +}; +// clang-format on + +// clang-format off +static const uint16_t z2_y_iter_masks_u16x4[5][4] = { + { 0U, 0U, 0U, 0U }, + { 0xffffU, 0U, 0U, 0U }, + { 0xffffU, 0xffffU, 0U, 0U }, + { 0xffffU, 0xffffU, 0xffffU, 0U }, + { 0xffffU, 0xffffU, 0xffffU, 0xffffU }, +}; +// clang-format on + +// clang-format off +static const uint16_t z2_y_iter_masks_u16x8[9][8] = { + { 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U }, + { 0xffffU, 0U, 0U, 0U, 0U, 0U, 0U, 0U }, + { 0xffffU, 0xffffU, 0U, 0U, 0U, 0U, 0U, 0U }, + { 0xffffU, 0xffffU, 0xffffU, 0U, 0U, 0U, 0U, 0U }, + { 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0U, 0U, 0U, 0U }, + { 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0U, 0U, 0U }, + { 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0U, 0U }, + { 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0U }, + { 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0xffffU, 0xffffU }, +}; +// clang-format on + +static AOM_FORCE_INLINE uint16x4_t highbd_dr_prediction_z2_tbl_left_x4_from_x8( + const uint16x8_t left_data, const int16x4_t indices, int base, int n) { + // Need to adjust indices to operate on 0-based indices rather than + // `base`-based indices and then adjust from uint16x4 indices to uint8x8 + // indices so we can use a tbl instruction (which only operates on bytes). + uint8x8_t left_indices = + vreinterpret_u8_s16(vsub_s16(indices, vdup_n_s16(base))); + left_indices = vtrn1_u8(left_indices, left_indices); + left_indices = vadd_u8(left_indices, left_indices); + left_indices = vadd_u8(left_indices, vreinterpret_u8_u16(vdup_n_u16(0x0100))); + const uint16x4_t ret = vreinterpret_u16_u8( + vqtbl1_u8(vreinterpretq_u8_u16(left_data), left_indices)); + return vand_u16(ret, vld1_u16(z2_y_iter_masks_u16x4[n])); +} + +static AOM_FORCE_INLINE uint16x4_t highbd_dr_prediction_z2_tbl_left_x4_from_x16( + const uint16x8x2_t left_data, const int16x4_t indices, int base, int n) { + // Need to adjust indices to operate on 0-based indices rather than + // `base`-based indices and then adjust from uint16x4 indices to uint8x8 + // indices so we can use a tbl instruction (which only operates on bytes). + uint8x8_t left_indices = + vreinterpret_u8_s16(vsub_s16(indices, vdup_n_s16(base))); + left_indices = vtrn1_u8(left_indices, left_indices); + left_indices = vadd_u8(left_indices, left_indices); + left_indices = vadd_u8(left_indices, vreinterpret_u8_u16(vdup_n_u16(0x0100))); + uint8x16x2_t data_u8 = { { vreinterpretq_u8_u16(left_data.val[0]), + vreinterpretq_u8_u16(left_data.val[1]) } }; + const uint16x4_t ret = vreinterpret_u16_u8(vqtbl2_u8(data_u8, left_indices)); + return vand_u16(ret, vld1_u16(z2_y_iter_masks_u16x4[n])); +} + +static AOM_FORCE_INLINE uint16x8_t highbd_dr_prediction_z2_tbl_left_x8_from_x8( + const uint16x8_t left_data, const int16x8_t indices, int base, int n) { + // Need to adjust indices to operate on 0-based indices rather than + // `base`-based indices and then adjust from uint16x4 indices to uint8x8 + // indices so we can use a tbl instruction (which only operates on bytes). + uint8x16_t left_indices = + vreinterpretq_u8_s16(vsubq_s16(indices, vdupq_n_s16(base))); + left_indices = vtrn1q_u8(left_indices, left_indices); + left_indices = vaddq_u8(left_indices, left_indices); + left_indices = + vaddq_u8(left_indices, vreinterpretq_u8_u16(vdupq_n_u16(0x0100))); + const uint16x8_t ret = vreinterpretq_u16_u8( + vqtbl1q_u8(vreinterpretq_u8_u16(left_data), left_indices)); + return vandq_u16(ret, vld1q_u16(z2_y_iter_masks_u16x8[n])); +} + +static AOM_FORCE_INLINE uint16x8_t highbd_dr_prediction_z2_tbl_left_x8_from_x16( + const uint16x8x2_t left_data, const int16x8_t indices, int base, int n) { + // Need to adjust indices to operate on 0-based indices rather than + // `base`-based indices and then adjust from uint16x4 indices to uint8x8 + // indices so we can use a tbl instruction (which only operates on bytes). + uint8x16_t left_indices = + vreinterpretq_u8_s16(vsubq_s16(indices, vdupq_n_s16(base))); + left_indices = vtrn1q_u8(left_indices, left_indices); + left_indices = vaddq_u8(left_indices, left_indices); + left_indices = + vaddq_u8(left_indices, vreinterpretq_u8_u16(vdupq_n_u16(0x0100))); + uint8x16x2_t data_u8 = { { vreinterpretq_u8_u16(left_data.val[0]), + vreinterpretq_u8_u16(left_data.val[1]) } }; + const uint16x8_t ret = + vreinterpretq_u16_u8(vqtbl2q_u8(data_u8, left_indices)); + return vandq_u16(ret, vld1q_u16(z2_y_iter_masks_u16x8[n])); +} +#endif // AOM_ARCH_AARCH64 + +static AOM_FORCE_INLINE uint16x4x2_t highbd_dr_prediction_z2_gather_left_x4( + const uint16_t *left, const int16x4_t indices, int n) { + assert(n > 0); + assert(n <= 4); + // Load two elements at a time and then uzp them into separate vectors, to + // reduce the number of memory accesses. + uint32x2_t ret0_u32 = vdup_n_u32(0); + uint32x2_t ret1_u32 = vdup_n_u32(0); + + // Use a single vget_lane_u64 to minimize vector to general purpose register + // transfers and then mask off the bits we actually want. + const uint64_t indices0123 = vget_lane_u64(vreinterpret_u64_s16(indices), 0); + const int idx0 = (int16_t)((indices0123 >> 0) & 0xffffU); + const int idx1 = (int16_t)((indices0123 >> 16) & 0xffffU); + const int idx2 = (int16_t)((indices0123 >> 32) & 0xffffU); + const int idx3 = (int16_t)((indices0123 >> 48) & 0xffffU); + + // At time of writing both Clang and GCC produced better code with these + // nested if-statements compared to a switch statement with fallthrough. + ret0_u32 = vld1_lane_u32((const uint32_t *)(left + idx0), ret0_u32, 0); + if (n > 1) { + ret0_u32 = vld1_lane_u32((const uint32_t *)(left + idx1), ret0_u32, 1); + if (n > 2) { + ret1_u32 = vld1_lane_u32((const uint32_t *)(left + idx2), ret1_u32, 0); + if (n > 3) { + ret1_u32 = vld1_lane_u32((const uint32_t *)(left + idx3), ret1_u32, 1); + } + } + } + return vuzp_u16(vreinterpret_u16_u32(ret0_u32), + vreinterpret_u16_u32(ret1_u32)); +} + +static AOM_FORCE_INLINE uint16x8x2_t highbd_dr_prediction_z2_gather_left_x8( + const uint16_t *left, const int16x8_t indices, int n) { + assert(n > 0); + assert(n <= 8); + // Load two elements at a time and then uzp them into separate vectors, to + // reduce the number of memory accesses. + uint32x4_t ret0_u32 = vdupq_n_u32(0); + uint32x4_t ret1_u32 = vdupq_n_u32(0); + + // Use a pair of vget_lane_u64 to minimize vector to general purpose register + // transfers and then mask off the bits we actually want. + const uint64_t indices0123 = + vgetq_lane_u64(vreinterpretq_u64_s16(indices), 0); + const uint64_t indices4567 = + vgetq_lane_u64(vreinterpretq_u64_s16(indices), 1); + const int idx0 = (int16_t)((indices0123 >> 0) & 0xffffU); + const int idx1 = (int16_t)((indices0123 >> 16) & 0xffffU); + const int idx2 = (int16_t)((indices0123 >> 32) & 0xffffU); + const int idx3 = (int16_t)((indices0123 >> 48) & 0xffffU); + const int idx4 = (int16_t)((indices4567 >> 0) & 0xffffU); + const int idx5 = (int16_t)((indices4567 >> 16) & 0xffffU); + const int idx6 = (int16_t)((indices4567 >> 32) & 0xffffU); + const int idx7 = (int16_t)((indices4567 >> 48) & 0xffffU); + + // At time of writing both Clang and GCC produced better code with these + // nested if-statements compared to a switch statement with fallthrough. + ret0_u32 = vld1q_lane_u32((const uint32_t *)(left + idx0), ret0_u32, 0); + if (n > 1) { + ret0_u32 = vld1q_lane_u32((const uint32_t *)(left + idx1), ret0_u32, 1); + if (n > 2) { + ret0_u32 = vld1q_lane_u32((const uint32_t *)(left + idx2), ret0_u32, 2); + if (n > 3) { + ret0_u32 = vld1q_lane_u32((const uint32_t *)(left + idx3), ret0_u32, 3); + if (n > 4) { + ret1_u32 = + vld1q_lane_u32((const uint32_t *)(left + idx4), ret1_u32, 0); + if (n > 5) { + ret1_u32 = + vld1q_lane_u32((const uint32_t *)(left + idx5), ret1_u32, 1); + if (n > 6) { + ret1_u32 = + vld1q_lane_u32((const uint32_t *)(left + idx6), ret1_u32, 2); + if (n > 7) { + ret1_u32 = vld1q_lane_u32((const uint32_t *)(left + idx7), + ret1_u32, 3); + } + } + } + } + } + } + } + return vuzpq_u16(vreinterpretq_u16_u32(ret0_u32), + vreinterpretq_u16_u32(ret1_u32)); +} + +static AOM_FORCE_INLINE uint16x4_t highbd_dr_prediction_z2_merge_x4( + uint16x4_t out_x, uint16x4_t out_y, int base_shift) { + assert(base_shift >= 0); + assert(base_shift <= 4); + // On AArch64 we can permute the data from the `above` and `left` vectors + // into a single vector in a single load (of the permute vector) + tbl. +#if AOM_ARCH_AARCH64 + const uint8x8x2_t out_yx = { { vreinterpret_u8_u16(out_y), + vreinterpret_u8_u16(out_x) } }; + return vreinterpret_u16_u8( + vtbl2_u8(out_yx, vld1_u8(z2_merge_shuffles_u16x4[base_shift]))); +#else + uint16x4_t out = out_y; + for (int c2 = base_shift, x_idx = 0; c2 < 4; ++c2, ++x_idx) { + out[c2] = out_x[x_idx]; + } + return out; +#endif +} + +static AOM_FORCE_INLINE uint16x8_t highbd_dr_prediction_z2_merge_x8( + uint16x8_t out_x, uint16x8_t out_y, int base_shift) { + assert(base_shift >= 0); + assert(base_shift <= 8); + // On AArch64 we can permute the data from the `above` and `left` vectors + // into a single vector in a single load (of the permute vector) + tbl. +#if AOM_ARCH_AARCH64 + const uint8x16x2_t out_yx = { { vreinterpretq_u8_u16(out_y), + vreinterpretq_u8_u16(out_x) } }; + return vreinterpretq_u16_u8( + vqtbl2q_u8(out_yx, vld1q_u8(z2_merge_shuffles_u16x8[base_shift]))); +#else + uint16x8_t out = out_y; + for (int c2 = base_shift, x_idx = 0; c2 < 8; ++c2, ++x_idx) { + out[c2] = out_x[x_idx]; + } + return out; +#endif +} + +static AOM_FORCE_INLINE uint16x4_t highbd_dr_prediction_z2_apply_shift_x4( + uint16x4_t a0, uint16x4_t a1, int16x4_t shift) { + uint32x4_t res = vmull_u16(a1, vreinterpret_u16_s16(shift)); + res = + vmlal_u16(res, a0, vsub_u16(vdup_n_u16(32), vreinterpret_u16_s16(shift))); + return vrshrn_n_u32(res, 5); +} + +static AOM_FORCE_INLINE uint16x8_t highbd_dr_prediction_z2_apply_shift_x8( + uint16x8_t a0, uint16x8_t a1, int16x8_t shift) { + return vcombine_u16( + highbd_dr_prediction_z2_apply_shift_x4(vget_low_u16(a0), vget_low_u16(a1), + vget_low_s16(shift)), + highbd_dr_prediction_z2_apply_shift_x4( + vget_high_u16(a0), vget_high_u16(a1), vget_high_s16(shift))); +} + +static AOM_FORCE_INLINE uint16x4_t highbd_dr_prediction_z2_step_x4( + const uint16_t *above, const uint16x4_t above0, const uint16x4_t above1, + const uint16_t *left, int dx, int dy, int r, int c) { + const int16x4_t iota = vld1_s16(iota1_s16); + + const int x0 = (c << 6) - (r + 1) * dx; + const int y0 = (r << 6) - (c + 1) * dy; + + const int16x4_t x0123 = vadd_s16(vdup_n_s16(x0), vshl_n_s16(iota, 6)); + const int16x4_t y0123 = vsub_s16(vdup_n_s16(y0), vmul_n_s16(iota, dy)); + const int16x4_t shift_x0123 = + vshr_n_s16(vand_s16(x0123, vdup_n_s16(0x3F)), 1); + const int16x4_t shift_y0123 = + vshr_n_s16(vand_s16(y0123, vdup_n_s16(0x3F)), 1); + const int16x4_t base_y0123 = vshr_n_s16(y0123, 6); + + const int base_shift = ((((r + 1) * dx) - 1) >> 6) - c; + + // Based on the value of `base_shift` there are three possible cases to + // compute the result: + // 1) base_shift <= 0: We can load and operate entirely on data from the + // `above` input vector. + // 2) base_shift < vl: We can load from `above[-1]` and shift + // `vl - base_shift` elements across to the end of the + // vector, then compute the remainder from `left`. + // 3) base_shift >= vl: We can load and operate entirely on data from the + // `left` input vector. + + if (base_shift <= 0) { + const int base_x = x0 >> 6; + const uint16x4_t a0 = vld1_u16(above + base_x); + const uint16x4_t a1 = vld1_u16(above + base_x + 1); + return highbd_dr_prediction_z2_apply_shift_x4(a0, a1, shift_x0123); + } else if (base_shift < 4) { + const uint16x4x2_t l01 = highbd_dr_prediction_z2_gather_left_x4( + left + 1, base_y0123, base_shift); + const uint16x4_t out16_y = highbd_dr_prediction_z2_apply_shift_x4( + l01.val[0], l01.val[1], shift_y0123); + + // No need to reload from above in the loop, just use pre-loaded constants. + const uint16x4_t out16_x = + highbd_dr_prediction_z2_apply_shift_x4(above0, above1, shift_x0123); + + return highbd_dr_prediction_z2_merge_x4(out16_x, out16_y, base_shift); + } else { + const uint16x4x2_t l01 = + highbd_dr_prediction_z2_gather_left_x4(left + 1, base_y0123, 4); + return highbd_dr_prediction_z2_apply_shift_x4(l01.val[0], l01.val[1], + shift_y0123); + } +} + +static AOM_FORCE_INLINE uint16x8_t highbd_dr_prediction_z2_step_x8( + const uint16_t *above, const uint16x8_t above0, const uint16x8_t above1, + const uint16_t *left, int dx, int dy, int r, int c) { + const int16x8_t iota = vld1q_s16(iota1_s16); + + const int x0 = (c << 6) - (r + 1) * dx; + const int y0 = (r << 6) - (c + 1) * dy; + + const int16x8_t x01234567 = vaddq_s16(vdupq_n_s16(x0), vshlq_n_s16(iota, 6)); + const int16x8_t y01234567 = vsubq_s16(vdupq_n_s16(y0), vmulq_n_s16(iota, dy)); + const int16x8_t shift_x01234567 = + vshrq_n_s16(vandq_s16(x01234567, vdupq_n_s16(0x3F)), 1); + const int16x8_t shift_y01234567 = + vshrq_n_s16(vandq_s16(y01234567, vdupq_n_s16(0x3F)), 1); + const int16x8_t base_y01234567 = vshrq_n_s16(y01234567, 6); + + const int base_shift = ((((r + 1) * dx) - 1) >> 6) - c; + + // Based on the value of `base_shift` there are three possible cases to + // compute the result: + // 1) base_shift <= 0: We can load and operate entirely on data from the + // `above` input vector. + // 2) base_shift < vl: We can load from `above[-1]` and shift + // `vl - base_shift` elements across to the end of the + // vector, then compute the remainder from `left`. + // 3) base_shift >= vl: We can load and operate entirely on data from the + // `left` input vector. + + if (base_shift <= 0) { + const int base_x = x0 >> 6; + const uint16x8_t a0 = vld1q_u16(above + base_x); + const uint16x8_t a1 = vld1q_u16(above + base_x + 1); + return highbd_dr_prediction_z2_apply_shift_x8(a0, a1, shift_x01234567); + } else if (base_shift < 8) { + const uint16x8x2_t l01 = highbd_dr_prediction_z2_gather_left_x8( + left + 1, base_y01234567, base_shift); + const uint16x8_t out16_y = highbd_dr_prediction_z2_apply_shift_x8( + l01.val[0], l01.val[1], shift_y01234567); + + // No need to reload from above in the loop, just use pre-loaded constants. + const uint16x8_t out16_x = + highbd_dr_prediction_z2_apply_shift_x8(above0, above1, shift_x01234567); + + return highbd_dr_prediction_z2_merge_x8(out16_x, out16_y, base_shift); + } else { + const uint16x8x2_t l01 = + highbd_dr_prediction_z2_gather_left_x8(left + 1, base_y01234567, 8); + return highbd_dr_prediction_z2_apply_shift_x8(l01.val[0], l01.val[1], + shift_y01234567); + } +} + +// Left array is accessed from -1 through `bh - 1` inclusive. +// Above array is accessed from -1 through `bw - 1` inclusive. +#define HIGHBD_DR_PREDICTOR_Z2_WXH(bw, bh) \ + static void highbd_dr_prediction_z2_##bw##x##bh##_neon( \ + uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \ + const uint16_t *left, int upsample_above, int upsample_left, int dx, \ + int dy, int bd) { \ + (void)bd; \ + (void)upsample_above; \ + (void)upsample_left; \ + assert(!upsample_above); \ + assert(!upsample_left); \ + assert(bw % 4 == 0); \ + assert(bh % 4 == 0); \ + assert(dx > 0); \ + assert(dy > 0); \ + \ + uint16_t left_data[bh + 1]; \ + memcpy(left_data, left - 1, (bh + 1) * sizeof(uint16_t)); \ + \ + uint16x8_t a0, a1; \ + if (bw == 4) { \ + a0 = vcombine_u16(vld1_u16(above - 1), vdup_n_u16(0)); \ + a1 = vcombine_u16(vld1_u16(above + 0), vdup_n_u16(0)); \ + } else { \ + a0 = vld1q_u16(above - 1); \ + a1 = vld1q_u16(above + 0); \ + } \ + \ + int r = 0; \ + do { \ + if (bw == 4) { \ + vst1_u16(dst, highbd_dr_prediction_z2_step_x4( \ + above, vget_low_u16(a0), vget_low_u16(a1), \ + left_data, dx, dy, r, 0)); \ + } else { \ + int c = 0; \ + do { \ + vst1q_u16(dst + c, highbd_dr_prediction_z2_step_x8( \ + above, a0, a1, left_data, dx, dy, r, c)); \ + c += 8; \ + } while (c < bw); \ + } \ + dst += stride; \ + } while (++r < bh); \ + } + +HIGHBD_DR_PREDICTOR_Z2_WXH(4, 16) +HIGHBD_DR_PREDICTOR_Z2_WXH(8, 16) +HIGHBD_DR_PREDICTOR_Z2_WXH(8, 32) +HIGHBD_DR_PREDICTOR_Z2_WXH(16, 4) +HIGHBD_DR_PREDICTOR_Z2_WXH(16, 8) +HIGHBD_DR_PREDICTOR_Z2_WXH(16, 16) +HIGHBD_DR_PREDICTOR_Z2_WXH(16, 32) +HIGHBD_DR_PREDICTOR_Z2_WXH(16, 64) +HIGHBD_DR_PREDICTOR_Z2_WXH(32, 8) +HIGHBD_DR_PREDICTOR_Z2_WXH(32, 16) +HIGHBD_DR_PREDICTOR_Z2_WXH(32, 32) +HIGHBD_DR_PREDICTOR_Z2_WXH(32, 64) +HIGHBD_DR_PREDICTOR_Z2_WXH(64, 16) +HIGHBD_DR_PREDICTOR_Z2_WXH(64, 32) +HIGHBD_DR_PREDICTOR_Z2_WXH(64, 64) + +#undef HIGHBD_DR_PREDICTOR_Z2_WXH + +typedef void (*highbd_dr_prediction_z2_ptr)(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, + int upsample_above, + int upsample_left, int dx, int dy, + int bd); + +static void highbd_dr_prediction_z2_4x4_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, + int upsample_above, + int upsample_left, int dx, int dy, + int bd) { + (void)bd; + assert(dx > 0); + assert(dy > 0); + + const int frac_bits_x = 6 - upsample_above; + const int frac_bits_y = 6 - upsample_left; + const int min_base_x = -(1 << (upsample_above + frac_bits_x)); + + // if `upsample_left` then we need -2 through 6 inclusive from `left`. + // else we only need -1 through 3 inclusive. + +#if AOM_ARCH_AARCH64 + uint16x8_t left_data0, left_data1; + if (upsample_left) { + left_data0 = vld1q_u16(left - 2); + left_data1 = vld1q_u16(left - 1); + } else { + left_data0 = vcombine_u16(vld1_u16(left - 1), vdup_n_u16(0)); + left_data1 = vcombine_u16(vld1_u16(left + 0), vdup_n_u16(0)); + } +#endif + + const int16x4_t iota0123 = vld1_s16(iota1_s16); + const int16x4_t iota1234 = vld1_s16(iota1_s16 + 1); + + for (int r = 0; r < 4; ++r) { + const int base_shift = (min_base_x + (r + 1) * dx + 63) >> 6; + const int x0 = (r + 1) * dx; + const int16x4_t x0123 = vsub_s16(vshl_n_s16(iota0123, 6), vdup_n_s16(x0)); + const int base_x0 = (-x0) >> frac_bits_x; + if (base_shift <= 0) { + uint16x4_t a0, a1; + int16x4_t shift_x0123; + if (upsample_above) { + const uint16x4x2_t a01 = vld2_u16(above + base_x0); + a0 = a01.val[0]; + a1 = a01.val[1]; + shift_x0123 = vand_s16(x0123, vdup_n_s16(0x1F)); + } else { + a0 = vld1_u16(above + base_x0); + a1 = vld1_u16(above + base_x0 + 1); + shift_x0123 = vshr_n_s16(vand_s16(x0123, vdup_n_s16(0x3F)), 1); + } + vst1_u16(dst, + highbd_dr_prediction_z2_apply_shift_x4(a0, a1, shift_x0123)); + } else if (base_shift < 4) { + // Calculate Y component from `left`. + const int y_iters = base_shift; + const int16x4_t y0123 = + vsub_s16(vdup_n_s16(r << 6), vmul_n_s16(iota1234, dy)); + const int16x4_t base_y0123 = vshl_s16(y0123, vdup_n_s16(-frac_bits_y)); + const int16x4_t shift_y0123 = vshr_n_s16( + vand_s16(vmul_n_s16(y0123, 1 << upsample_left), vdup_n_s16(0x3F)), 1); + uint16x4_t l0, l1; +#if AOM_ARCH_AARCH64 + const int left_data_base = upsample_left ? -2 : -1; + l0 = highbd_dr_prediction_z2_tbl_left_x4_from_x8(left_data0, base_y0123, + left_data_base, y_iters); + l1 = highbd_dr_prediction_z2_tbl_left_x4_from_x8(left_data1, base_y0123, + left_data_base, y_iters); +#else + const uint16x4x2_t l01 = + highbd_dr_prediction_z2_gather_left_x4(left, base_y0123, y_iters); + l0 = l01.val[0]; + l1 = l01.val[1]; +#endif + + const uint16x4_t out_y = + highbd_dr_prediction_z2_apply_shift_x4(l0, l1, shift_y0123); + + // Calculate X component from `above`. + const int16x4_t shift_x0123 = vshr_n_s16( + vand_s16(vmul_n_s16(x0123, 1 << upsample_above), vdup_n_s16(0x3F)), + 1); + uint16x4_t a0, a1; + if (upsample_above) { + const uint16x4x2_t a01 = vld2_u16(above + (base_x0 % 2 == 0 ? -2 : -1)); + a0 = a01.val[0]; + a1 = a01.val[1]; + } else { + a0 = vld1_u16(above - 1); + a1 = vld1_u16(above + 0); + } + const uint16x4_t out_x = + highbd_dr_prediction_z2_apply_shift_x4(a0, a1, shift_x0123); + + // Combine X and Y vectors. + const uint16x4_t out = + highbd_dr_prediction_z2_merge_x4(out_x, out_y, base_shift); + vst1_u16(dst, out); + } else { + const int16x4_t y0123 = + vsub_s16(vdup_n_s16(r << 6), vmul_n_s16(iota1234, dy)); + const int16x4_t base_y0123 = vshl_s16(y0123, vdup_n_s16(-frac_bits_y)); + const int16x4_t shift_y0123 = vshr_n_s16( + vand_s16(vmul_n_s16(y0123, 1 << upsample_left), vdup_n_s16(0x3F)), 1); + uint16x4_t l0, l1; +#if AOM_ARCH_AARCH64 + const int left_data_base = upsample_left ? -2 : -1; + l0 = highbd_dr_prediction_z2_tbl_left_x4_from_x8(left_data0, base_y0123, + left_data_base, 4); + l1 = highbd_dr_prediction_z2_tbl_left_x4_from_x8(left_data1, base_y0123, + left_data_base, 4); +#else + const uint16x4x2_t l01 = + highbd_dr_prediction_z2_gather_left_x4(left, base_y0123, 4); + l0 = l01.val[0]; + l1 = l01.val[1]; +#endif + vst1_u16(dst, + highbd_dr_prediction_z2_apply_shift_x4(l0, l1, shift_y0123)); + } + dst += stride; + } +} + +static void highbd_dr_prediction_z2_4x8_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, + int upsample_above, + int upsample_left, int dx, int dy, + int bd) { + (void)bd; + assert(dx > 0); + assert(dy > 0); + + const int frac_bits_x = 6 - upsample_above; + const int frac_bits_y = 6 - upsample_left; + const int min_base_x = -(1 << (upsample_above + frac_bits_x)); + + // if `upsample_left` then we need -2 through 14 inclusive from `left`. + // else we only need -1 through 6 inclusive. + +#if AOM_ARCH_AARCH64 + uint16x8x2_t left_data0, left_data1; + if (upsample_left) { + left_data0 = vld1q_u16_x2(left - 2); + left_data1 = vld1q_u16_x2(left - 1); + } else { + left_data0 = (uint16x8x2_t){ { vld1q_u16(left - 1), vdupq_n_u16(0) } }; + left_data1 = (uint16x8x2_t){ { vld1q_u16(left + 0), vdupq_n_u16(0) } }; + } +#endif + + const int16x4_t iota0123 = vld1_s16(iota1_s16); + const int16x4_t iota1234 = vld1_s16(iota1_s16 + 1); + + for (int r = 0; r < 8; ++r) { + const int base_shift = (min_base_x + (r + 1) * dx + 63) >> 6; + const int x0 = (r + 1) * dx; + const int16x4_t x0123 = vsub_s16(vshl_n_s16(iota0123, 6), vdup_n_s16(x0)); + const int base_x0 = (-x0) >> frac_bits_x; + if (base_shift <= 0) { + uint16x4_t a0, a1; + int16x4_t shift_x0123; + if (upsample_above) { + const uint16x4x2_t a01 = vld2_u16(above + base_x0); + a0 = a01.val[0]; + a1 = a01.val[1]; + shift_x0123 = vand_s16(x0123, vdup_n_s16(0x1F)); + } else { + a0 = vld1_u16(above + base_x0); + a1 = vld1_u16(above + base_x0 + 1); + shift_x0123 = vand_s16(vshr_n_s16(x0123, 1), vdup_n_s16(0x1F)); + } + vst1_u16(dst, + highbd_dr_prediction_z2_apply_shift_x4(a0, a1, shift_x0123)); + } else if (base_shift < 4) { + // Calculate Y component from `left`. + const int y_iters = base_shift; + const int16x4_t y0123 = + vsub_s16(vdup_n_s16(r << 6), vmul_n_s16(iota1234, dy)); + const int16x4_t base_y0123 = vshl_s16(y0123, vdup_n_s16(-frac_bits_y)); + const int16x4_t shift_y0123 = vshr_n_s16( + vand_s16(vmul_n_s16(y0123, 1 << upsample_left), vdup_n_s16(0x3F)), 1); + + uint16x4_t l0, l1; +#if AOM_ARCH_AARCH64 + const int left_data_base = upsample_left ? -2 : -1; + l0 = highbd_dr_prediction_z2_tbl_left_x4_from_x16( + left_data0, base_y0123, left_data_base, y_iters); + l1 = highbd_dr_prediction_z2_tbl_left_x4_from_x16( + left_data1, base_y0123, left_data_base, y_iters); +#else + const uint16x4x2_t l01 = + highbd_dr_prediction_z2_gather_left_x4(left, base_y0123, y_iters); + l0 = l01.val[0]; + l1 = l01.val[1]; +#endif + + const uint16x4_t out_y = + highbd_dr_prediction_z2_apply_shift_x4(l0, l1, shift_y0123); + + // Calculate X component from `above`. + uint16x4_t a0, a1; + int16x4_t shift_x0123; + if (upsample_above) { + const uint16x4x2_t a01 = vld2_u16(above + (base_x0 % 2 == 0 ? -2 : -1)); + a0 = a01.val[0]; + a1 = a01.val[1]; + shift_x0123 = vand_s16(x0123, vdup_n_s16(0x1F)); + } else { + a0 = vld1_u16(above - 1); + a1 = vld1_u16(above + 0); + shift_x0123 = vand_s16(vshr_n_s16(x0123, 1), vdup_n_s16(0x1F)); + } + const uint16x4_t out_x = + highbd_dr_prediction_z2_apply_shift_x4(a0, a1, shift_x0123); + + // Combine X and Y vectors. + const uint16x4_t out = + highbd_dr_prediction_z2_merge_x4(out_x, out_y, base_shift); + vst1_u16(dst, out); + } else { + const int16x4_t y0123 = + vsub_s16(vdup_n_s16(r << 6), vmul_n_s16(iota1234, dy)); + const int16x4_t base_y0123 = vshl_s16(y0123, vdup_n_s16(-frac_bits_y)); + const int16x4_t shift_y0123 = vshr_n_s16( + vand_s16(vmul_n_s16(y0123, 1 << upsample_left), vdup_n_s16(0x3F)), 1); + + uint16x4_t l0, l1; +#if AOM_ARCH_AARCH64 + const int left_data_base = upsample_left ? -2 : -1; + l0 = highbd_dr_prediction_z2_tbl_left_x4_from_x16(left_data0, base_y0123, + left_data_base, 4); + l1 = highbd_dr_prediction_z2_tbl_left_x4_from_x16(left_data1, base_y0123, + left_data_base, 4); +#else + const uint16x4x2_t l01 = + highbd_dr_prediction_z2_gather_left_x4(left, base_y0123, 4); + l0 = l01.val[0]; + l1 = l01.val[1]; +#endif + + vst1_u16(dst, + highbd_dr_prediction_z2_apply_shift_x4(l0, l1, shift_y0123)); + } + dst += stride; + } +} + +static void highbd_dr_prediction_z2_8x4_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, + int upsample_above, + int upsample_left, int dx, int dy, + int bd) { + (void)bd; + assert(dx > 0); + assert(dy > 0); + + const int frac_bits_x = 6 - upsample_above; + const int frac_bits_y = 6 - upsample_left; + const int min_base_x = -(1 << (upsample_above + frac_bits_x)); + + // if `upsample_left` then we need -2 through 6 inclusive from `left`. + // else we only need -1 through 3 inclusive. + +#if AOM_ARCH_AARCH64 + uint16x8_t left_data0, left_data1; + if (upsample_left) { + left_data0 = vld1q_u16(left - 2); + left_data1 = vld1q_u16(left - 1); + } else { + left_data0 = vcombine_u16(vld1_u16(left - 1), vdup_n_u16(0)); + left_data1 = vcombine_u16(vld1_u16(left + 0), vdup_n_u16(0)); + } +#endif + + const int16x8_t iota01234567 = vld1q_s16(iota1_s16); + const int16x8_t iota12345678 = vld1q_s16(iota1_s16 + 1); + + for (int r = 0; r < 4; ++r) { + const int base_shift = (min_base_x + (r + 1) * dx + 63) >> 6; + const int x0 = (r + 1) * dx; + const int16x8_t x01234567 = + vsubq_s16(vshlq_n_s16(iota01234567, 6), vdupq_n_s16(x0)); + const int base_x0 = (-x0) >> frac_bits_x; + if (base_shift <= 0) { + uint16x8_t a0, a1; + int16x8_t shift_x01234567; + if (upsample_above) { + const uint16x8x2_t a01 = vld2q_u16(above + base_x0); + a0 = a01.val[0]; + a1 = a01.val[1]; + shift_x01234567 = vandq_s16(x01234567, vdupq_n_s16(0x1F)); + } else { + a0 = vld1q_u16(above + base_x0); + a1 = vld1q_u16(above + base_x0 + 1); + shift_x01234567 = + vandq_s16(vshrq_n_s16(x01234567, 1), vdupq_n_s16(0x1F)); + } + vst1q_u16( + dst, highbd_dr_prediction_z2_apply_shift_x8(a0, a1, shift_x01234567)); + } else if (base_shift < 8) { + // Calculate Y component from `left`. + const int y_iters = base_shift; + const int16x8_t y01234567 = + vsubq_s16(vdupq_n_s16(r << 6), vmulq_n_s16(iota12345678, dy)); + const int16x8_t base_y01234567 = + vshlq_s16(y01234567, vdupq_n_s16(-frac_bits_y)); + const int16x8_t shift_y01234567 = + vshrq_n_s16(vandq_s16(vmulq_n_s16(y01234567, 1 << upsample_left), + vdupq_n_s16(0x3F)), + 1); + + uint16x8_t l0, l1; +#if AOM_ARCH_AARCH64 + const int left_data_base = upsample_left ? -2 : -1; + l0 = highbd_dr_prediction_z2_tbl_left_x8_from_x8( + left_data0, base_y01234567, left_data_base, y_iters); + l1 = highbd_dr_prediction_z2_tbl_left_x8_from_x8( + left_data1, base_y01234567, left_data_base, y_iters); +#else + const uint16x8x2_t l01 = + highbd_dr_prediction_z2_gather_left_x8(left, base_y01234567, y_iters); + l0 = l01.val[0]; + l1 = l01.val[1]; +#endif + + const uint16x8_t out_y = + highbd_dr_prediction_z2_apply_shift_x8(l0, l1, shift_y01234567); + + // Calculate X component from `above`. + uint16x8_t a0, a1; + int16x8_t shift_x01234567; + if (upsample_above) { + const uint16x8x2_t a01 = + vld2q_u16(above + (base_x0 % 2 == 0 ? -2 : -1)); + a0 = a01.val[0]; + a1 = a01.val[1]; + shift_x01234567 = vandq_s16(x01234567, vdupq_n_s16(0x1F)); + } else { + a0 = vld1q_u16(above - 1); + a1 = vld1q_u16(above + 0); + shift_x01234567 = + vandq_s16(vshrq_n_s16(x01234567, 1), vdupq_n_s16(0x1F)); + } + const uint16x8_t out_x = + highbd_dr_prediction_z2_apply_shift_x8(a0, a1, shift_x01234567); + + // Combine X and Y vectors. + const uint16x8_t out = + highbd_dr_prediction_z2_merge_x8(out_x, out_y, base_shift); + vst1q_u16(dst, out); + } else { + const int16x8_t y01234567 = + vsubq_s16(vdupq_n_s16(r << 6), vmulq_n_s16(iota12345678, dy)); + const int16x8_t base_y01234567 = + vshlq_s16(y01234567, vdupq_n_s16(-frac_bits_y)); + const int16x8_t shift_y01234567 = + vshrq_n_s16(vandq_s16(vmulq_n_s16(y01234567, 1 << upsample_left), + vdupq_n_s16(0x3F)), + 1); + + uint16x8_t l0, l1; +#if AOM_ARCH_AARCH64 + const int left_data_base = upsample_left ? -2 : -1; + l0 = highbd_dr_prediction_z2_tbl_left_x8_from_x8( + left_data0, base_y01234567, left_data_base, 8); + l1 = highbd_dr_prediction_z2_tbl_left_x8_from_x8( + left_data1, base_y01234567, left_data_base, 8); +#else + const uint16x8x2_t l01 = + highbd_dr_prediction_z2_gather_left_x8(left, base_y01234567, 8); + l0 = l01.val[0]; + l1 = l01.val[1]; +#endif + + vst1q_u16( + dst, highbd_dr_prediction_z2_apply_shift_x8(l0, l1, shift_y01234567)); + } + dst += stride; + } +} + +static void highbd_dr_prediction_z2_8x8_neon(uint16_t *dst, ptrdiff_t stride, + const uint16_t *above, + const uint16_t *left, + int upsample_above, + int upsample_left, int dx, int dy, + int bd) { + (void)bd; + assert(dx > 0); + assert(dy > 0); + + const int frac_bits_x = 6 - upsample_above; + const int frac_bits_y = 6 - upsample_left; + const int min_base_x = -(1 << (upsample_above + frac_bits_x)); + + // if `upsample_left` then we need -2 through 14 inclusive from `left`. + // else we only need -1 through 6 inclusive. + +#if AOM_ARCH_AARCH64 + uint16x8x2_t left_data0, left_data1; + if (upsample_left) { + left_data0 = vld1q_u16_x2(left - 2); + left_data1 = vld1q_u16_x2(left - 1); + } else { + left_data0 = (uint16x8x2_t){ { vld1q_u16(left - 1), vdupq_n_u16(0) } }; + left_data1 = (uint16x8x2_t){ { vld1q_u16(left + 0), vdupq_n_u16(0) } }; + } +#endif + + const int16x8_t iota01234567 = vld1q_s16(iota1_s16); + const int16x8_t iota12345678 = vld1q_s16(iota1_s16 + 1); + + for (int r = 0; r < 8; ++r) { + const int base_shift = (min_base_x + (r + 1) * dx + 63) >> 6; + const int x0 = (r + 1) * dx; + const int16x8_t x01234567 = + vsubq_s16(vshlq_n_s16(iota01234567, 6), vdupq_n_s16(x0)); + const int base_x0 = (-x0) >> frac_bits_x; + if (base_shift <= 0) { + uint16x8_t a0, a1; + int16x8_t shift_x01234567; + if (upsample_above) { + const uint16x8x2_t a01 = vld2q_u16(above + base_x0); + a0 = a01.val[0]; + a1 = a01.val[1]; + shift_x01234567 = vandq_s16(x01234567, vdupq_n_s16(0x1F)); + } else { + a0 = vld1q_u16(above + base_x0); + a1 = vld1q_u16(above + base_x0 + 1); + shift_x01234567 = + vandq_s16(vshrq_n_s16(x01234567, 1), vdupq_n_s16(0x1F)); + } + vst1q_u16( + dst, highbd_dr_prediction_z2_apply_shift_x8(a0, a1, shift_x01234567)); + } else if (base_shift < 8) { + // Calculate Y component from `left`. + const int y_iters = base_shift; + const int16x8_t y01234567 = + vsubq_s16(vdupq_n_s16(r << 6), vmulq_n_s16(iota12345678, dy)); + const int16x8_t base_y01234567 = + vshlq_s16(y01234567, vdupq_n_s16(-frac_bits_y)); + const int16x8_t shift_y01234567 = + vshrq_n_s16(vandq_s16(vmulq_n_s16(y01234567, 1 << upsample_left), + vdupq_n_s16(0x3F)), + 1); + + uint16x8_t l0, l1; +#if AOM_ARCH_AARCH64 + const int left_data_base = upsample_left ? -2 : -1; + l0 = highbd_dr_prediction_z2_tbl_left_x8_from_x16( + left_data0, base_y01234567, left_data_base, y_iters); + l1 = highbd_dr_prediction_z2_tbl_left_x8_from_x16( + left_data1, base_y01234567, left_data_base, y_iters); +#else + const uint16x8x2_t l01 = + highbd_dr_prediction_z2_gather_left_x8(left, base_y01234567, y_iters); + l0 = l01.val[0]; + l1 = l01.val[1]; +#endif + + const uint16x8_t out_y = + highbd_dr_prediction_z2_apply_shift_x8(l0, l1, shift_y01234567); + + // Calculate X component from `above`. + uint16x8_t a0, a1; + int16x8_t shift_x01234567; + if (upsample_above) { + const uint16x8x2_t a01 = + vld2q_u16(above + (base_x0 % 2 == 0 ? -2 : -1)); + a0 = a01.val[0]; + a1 = a01.val[1]; + shift_x01234567 = vandq_s16(x01234567, vdupq_n_s16(0x1F)); + } else { + a0 = vld1q_u16(above - 1); + a1 = vld1q_u16(above + 0); + shift_x01234567 = + vandq_s16(vshrq_n_s16(x01234567, 1), vdupq_n_s16(0x1F)); + } + const uint16x8_t out_x = + highbd_dr_prediction_z2_apply_shift_x8(a0, a1, shift_x01234567); + + // Combine X and Y vectors. + const uint16x8_t out = + highbd_dr_prediction_z2_merge_x8(out_x, out_y, base_shift); + vst1q_u16(dst, out); + } else { + const int16x8_t y01234567 = + vsubq_s16(vdupq_n_s16(r << 6), vmulq_n_s16(iota12345678, dy)); + const int16x8_t base_y01234567 = + vshlq_s16(y01234567, vdupq_n_s16(-frac_bits_y)); + const int16x8_t shift_y01234567 = + vshrq_n_s16(vandq_s16(vmulq_n_s16(y01234567, 1 << upsample_left), + vdupq_n_s16(0x3F)), + 1); + + uint16x8_t l0, l1; +#if AOM_ARCH_AARCH64 + const int left_data_base = upsample_left ? -2 : -1; + l0 = highbd_dr_prediction_z2_tbl_left_x8_from_x16( + left_data0, base_y01234567, left_data_base, 8); + l1 = highbd_dr_prediction_z2_tbl_left_x8_from_x16( + left_data1, base_y01234567, left_data_base, 8); +#else + const uint16x8x2_t l01 = + highbd_dr_prediction_z2_gather_left_x8(left, base_y01234567, 8); + l0 = l01.val[0]; + l1 = l01.val[1]; +#endif + + vst1q_u16( + dst, highbd_dr_prediction_z2_apply_shift_x8(l0, l1, shift_y01234567)); + } + dst += stride; + } +} + +static highbd_dr_prediction_z2_ptr dr_predictor_z2_arr_neon[7][7] = { + { NULL, NULL, NULL, NULL, NULL, NULL, NULL }, + { NULL, NULL, NULL, NULL, NULL, NULL, NULL }, + { NULL, NULL, &highbd_dr_prediction_z2_4x4_neon, + &highbd_dr_prediction_z2_4x8_neon, &highbd_dr_prediction_z2_4x16_neon, NULL, + NULL }, + { NULL, NULL, &highbd_dr_prediction_z2_8x4_neon, + &highbd_dr_prediction_z2_8x8_neon, &highbd_dr_prediction_z2_8x16_neon, + &highbd_dr_prediction_z2_8x32_neon, NULL }, + { NULL, NULL, &highbd_dr_prediction_z2_16x4_neon, + &highbd_dr_prediction_z2_16x8_neon, &highbd_dr_prediction_z2_16x16_neon, + &highbd_dr_prediction_z2_16x32_neon, &highbd_dr_prediction_z2_16x64_neon }, + { NULL, NULL, NULL, &highbd_dr_prediction_z2_32x8_neon, + &highbd_dr_prediction_z2_32x16_neon, &highbd_dr_prediction_z2_32x32_neon, + &highbd_dr_prediction_z2_32x64_neon }, + { NULL, NULL, NULL, NULL, &highbd_dr_prediction_z2_64x16_neon, + &highbd_dr_prediction_z2_64x32_neon, &highbd_dr_prediction_z2_64x64_neon }, +}; + +// Directional prediction, zone 2: 90 < angle < 180 +void av1_highbd_dr_prediction_z2_neon(uint16_t *dst, ptrdiff_t stride, int bw, + int bh, const uint16_t *above, + const uint16_t *left, int upsample_above, + int upsample_left, int dx, int dy, + int bd) { + highbd_dr_prediction_z2_ptr f = + dr_predictor_z2_arr_neon[get_msb(bw)][get_msb(bh)]; + assert(f != NULL); + f(dst, stride, above, left, upsample_above, upsample_left, dx, dy, bd); +} + +// ----------------------------------------------------------------------------- +// Z3 + +// Both the lane to the use and the shift amount must be immediates. +#define HIGHBD_DR_PREDICTOR_Z3_STEP_X4(out, iota, base, in0, in1, s0, s1, \ + lane, shift) \ + do { \ + uint32x4_t val = vmull_lane_u16((in0), (s0), (lane)); \ + val = vmlal_lane_u16(val, (in1), (s1), (lane)); \ + const uint16x4_t cmp = vadd_u16((iota), vdup_n_u16(base)); \ + const uint16x4_t res = vrshrn_n_u32(val, (shift)); \ + *(out) = vbsl_u16(vclt_u16(cmp, vdup_n_u16(max_base_y)), res, \ + vdup_n_u16(left_max)); \ + } while (0) + +#define HIGHBD_DR_PREDICTOR_Z3_STEP_X8(out, iota, base, in0, in1, s0, s1, \ + lane, shift) \ + do { \ + uint32x4_t val_lo = vmull_lane_u16(vget_low_u16(in0), (s0), (lane)); \ + val_lo = vmlal_lane_u16(val_lo, vget_low_u16(in1), (s1), (lane)); \ + uint32x4_t val_hi = vmull_lane_u16(vget_high_u16(in0), (s0), (lane)); \ + val_hi = vmlal_lane_u16(val_hi, vget_high_u16(in1), (s1), (lane)); \ + const uint16x8_t cmp = vaddq_u16((iota), vdupq_n_u16(base)); \ + const uint16x8_t res = vcombine_u16(vrshrn_n_u32(val_lo, (shift)), \ + vrshrn_n_u32(val_hi, (shift))); \ + *(out) = vbslq_u16(vcltq_u16(cmp, vdupq_n_u16(max_base_y)), res, \ + vdupq_n_u16(left_max)); \ + } while (0) + +static void highbd_dr_prediction_z3_upsample0_neon(uint16_t *dst, + ptrdiff_t stride, int bw, + int bh, const uint16_t *left, + int dy) { + assert(bw % 4 == 0); + assert(bh % 4 == 0); + assert(dy > 0); + + // Factor out left + 1 to give the compiler a better chance of recognising + // that the offsets used for the loads from left and left + 1 are otherwise + // identical. + const uint16_t *left1 = left + 1; + + const int max_base_y = (bw + bh - 1); + const int left_max = left[max_base_y]; + const int frac_bits = 6; + + const uint16x8_t iota1x8 = vreinterpretq_u16_s16(vld1q_s16(iota1_s16)); + const uint16x4_t iota1x4 = vget_low_u16(iota1x8); + + // The C implementation of the z3 predictor when not upsampling uses: + // ((y & 0x3f) >> 1) + // The right shift is unnecessary here since we instead shift by +1 later, + // so adjust the mask to 0x3e to ensure we don't consider the extra bit. + const uint16x4_t shift_mask = vdup_n_u16(0x3e); + + if (bh == 4) { + int y = dy; + int c = 0; + do { + // Fully unroll the 4x4 block to allow us to use immediate lane-indexed + // multiply instructions. + const uint16x4_t shifts1 = + vand_u16(vmla_n_u16(vdup_n_u16(y), iota1x4, dy), shift_mask); + const uint16x4_t shifts0 = vsub_u16(vdup_n_u16(64), shifts1); + const int base0 = (y + 0 * dy) >> frac_bits; + const int base1 = (y + 1 * dy) >> frac_bits; + const int base2 = (y + 2 * dy) >> frac_bits; + const int base3 = (y + 3 * dy) >> frac_bits; + uint16x4_t out[4]; + if (base0 >= max_base_y) { + out[0] = vdup_n_u16(left_max); + } else { + const uint16x4_t l00 = vld1_u16(left + base0); + const uint16x4_t l01 = vld1_u16(left1 + base0); + HIGHBD_DR_PREDICTOR_Z3_STEP_X4(&out[0], iota1x4, base0, l00, l01, + shifts0, shifts1, 0, 6); + } + if (base1 >= max_base_y) { + out[1] = vdup_n_u16(left_max); + } else { + const uint16x4_t l10 = vld1_u16(left + base1); + const uint16x4_t l11 = vld1_u16(left1 + base1); + HIGHBD_DR_PREDICTOR_Z3_STEP_X4(&out[1], iota1x4, base1, l10, l11, + shifts0, shifts1, 1, 6); + } + if (base2 >= max_base_y) { + out[2] = vdup_n_u16(left_max); + } else { + const uint16x4_t l20 = vld1_u16(left + base2); + const uint16x4_t l21 = vld1_u16(left1 + base2); + HIGHBD_DR_PREDICTOR_Z3_STEP_X4(&out[2], iota1x4, base2, l20, l21, + shifts0, shifts1, 2, 6); + } + if (base3 >= max_base_y) { + out[3] = vdup_n_u16(left_max); + } else { + const uint16x4_t l30 = vld1_u16(left + base3); + const uint16x4_t l31 = vld1_u16(left1 + base3); + HIGHBD_DR_PREDICTOR_Z3_STEP_X4(&out[3], iota1x4, base3, l30, l31, + shifts0, shifts1, 3, 6); + } + transpose_array_inplace_u16_4x4(out); + for (int r2 = 0; r2 < 4; ++r2) { + vst1_u16(dst + r2 * stride + c, out[r2]); + } + y += 4 * dy; + c += 4; + } while (c < bw); + } else { + int y = dy; + int c = 0; + do { + int r = 0; + do { + // Fully unroll the 4x4 block to allow us to use immediate lane-indexed + // multiply instructions. + const uint16x4_t shifts1 = + vand_u16(vmla_n_u16(vdup_n_u16(y), iota1x4, dy), shift_mask); + const uint16x4_t shifts0 = vsub_u16(vdup_n_u16(64), shifts1); + const int base0 = ((y + 0 * dy) >> frac_bits) + r; + const int base1 = ((y + 1 * dy) >> frac_bits) + r; + const int base2 = ((y + 2 * dy) >> frac_bits) + r; + const int base3 = ((y + 3 * dy) >> frac_bits) + r; + uint16x8_t out[4]; + if (base0 >= max_base_y) { + out[0] = vdupq_n_u16(left_max); + } else { + const uint16x8_t l00 = vld1q_u16(left + base0); + const uint16x8_t l01 = vld1q_u16(left1 + base0); + HIGHBD_DR_PREDICTOR_Z3_STEP_X8(&out[0], iota1x8, base0, l00, l01, + shifts0, shifts1, 0, 6); + } + if (base1 >= max_base_y) { + out[1] = vdupq_n_u16(left_max); + } else { + const uint16x8_t l10 = vld1q_u16(left + base1); + const uint16x8_t l11 = vld1q_u16(left1 + base1); + HIGHBD_DR_PREDICTOR_Z3_STEP_X8(&out[1], iota1x8, base1, l10, l11, + shifts0, shifts1, 1, 6); + } + if (base2 >= max_base_y) { + out[2] = vdupq_n_u16(left_max); + } else { + const uint16x8_t l20 = vld1q_u16(left + base2); + const uint16x8_t l21 = vld1q_u16(left1 + base2); + HIGHBD_DR_PREDICTOR_Z3_STEP_X8(&out[2], iota1x8, base2, l20, l21, + shifts0, shifts1, 2, 6); + } + if (base3 >= max_base_y) { + out[3] = vdupq_n_u16(left_max); + } else { + const uint16x8_t l30 = vld1q_u16(left + base3); + const uint16x8_t l31 = vld1q_u16(left1 + base3); + HIGHBD_DR_PREDICTOR_Z3_STEP_X8(&out[3], iota1x8, base3, l30, l31, + shifts0, shifts1, 3, 6); + } + transpose_array_inplace_u16_4x8(out); + for (int r2 = 0; r2 < 4; ++r2) { + vst1_u16(dst + (r + r2) * stride + c, vget_low_u16(out[r2])); + } + for (int r2 = 0; r2 < 4; ++r2) { + vst1_u16(dst + (r + r2 + 4) * stride + c, vget_high_u16(out[r2])); + } + r += 8; + } while (r < bh); + y += 4 * dy; + c += 4; + } while (c < bw); + } +} + +static void highbd_dr_prediction_z3_upsample1_neon(uint16_t *dst, + ptrdiff_t stride, int bw, + int bh, const uint16_t *left, + int dy) { + assert(bw % 4 == 0); + assert(bh % 4 == 0); + assert(dy > 0); + + const int max_base_y = (bw + bh - 1) << 1; + const int left_max = left[max_base_y]; + const int frac_bits = 5; + + const uint16x4_t iota1x4 = vreinterpret_u16_s16(vld1_s16(iota1_s16)); + const uint16x8_t iota2x8 = vreinterpretq_u16_s16(vld1q_s16(iota2_s16)); + const uint16x4_t iota2x4 = vget_low_u16(iota2x8); + + // The C implementation of the z3 predictor when upsampling uses: + // (((x << 1) & 0x3f) >> 1) + // The two shifts are unnecessary here since the lowest bit is guaranteed to + // be zero when the mask is applied, so adjust the mask to 0x1f to avoid + // needing the shifts at all. + const uint16x4_t shift_mask = vdup_n_u16(0x1F); + + if (bh == 4) { + int y = dy; + int c = 0; + do { + // Fully unroll the 4x4 block to allow us to use immediate lane-indexed + // multiply instructions. + const uint16x4_t shifts1 = + vand_u16(vmla_n_u16(vdup_n_u16(y), iota1x4, dy), shift_mask); + const uint16x4_t shifts0 = vsub_u16(vdup_n_u16(32), shifts1); + const int base0 = (y + 0 * dy) >> frac_bits; + const int base1 = (y + 1 * dy) >> frac_bits; + const int base2 = (y + 2 * dy) >> frac_bits; + const int base3 = (y + 3 * dy) >> frac_bits; + const uint16x4x2_t l0 = vld2_u16(left + base0); + const uint16x4x2_t l1 = vld2_u16(left + base1); + const uint16x4x2_t l2 = vld2_u16(left + base2); + const uint16x4x2_t l3 = vld2_u16(left + base3); + uint16x4_t out[4]; + HIGHBD_DR_PREDICTOR_Z3_STEP_X4(&out[0], iota2x4, base0, l0.val[0], + l0.val[1], shifts0, shifts1, 0, 5); + HIGHBD_DR_PREDICTOR_Z3_STEP_X4(&out[1], iota2x4, base1, l1.val[0], + l1.val[1], shifts0, shifts1, 1, 5); + HIGHBD_DR_PREDICTOR_Z3_STEP_X4(&out[2], iota2x4, base2, l2.val[0], + l2.val[1], shifts0, shifts1, 2, 5); + HIGHBD_DR_PREDICTOR_Z3_STEP_X4(&out[3], iota2x4, base3, l3.val[0], + l3.val[1], shifts0, shifts1, 3, 5); + transpose_array_inplace_u16_4x4(out); + for (int r2 = 0; r2 < 4; ++r2) { + vst1_u16(dst + r2 * stride + c, out[r2]); + } + y += 4 * dy; + c += 4; + } while (c < bw); + } else { + assert(bh % 8 == 0); + + int y = dy; + int c = 0; + do { + int r = 0; + do { + // Fully unroll the 4x8 block to allow us to use immediate lane-indexed + // multiply instructions. + const uint16x4_t shifts1 = + vand_u16(vmla_n_u16(vdup_n_u16(y), iota1x4, dy), shift_mask); + const uint16x4_t shifts0 = vsub_u16(vdup_n_u16(32), shifts1); + const int base0 = ((y + 0 * dy) >> frac_bits) + (r * 2); + const int base1 = ((y + 1 * dy) >> frac_bits) + (r * 2); + const int base2 = ((y + 2 * dy) >> frac_bits) + (r * 2); + const int base3 = ((y + 3 * dy) >> frac_bits) + (r * 2); + const uint16x8x2_t l0 = vld2q_u16(left + base0); + const uint16x8x2_t l1 = vld2q_u16(left + base1); + const uint16x8x2_t l2 = vld2q_u16(left + base2); + const uint16x8x2_t l3 = vld2q_u16(left + base3); + uint16x8_t out[4]; + HIGHBD_DR_PREDICTOR_Z3_STEP_X8(&out[0], iota2x8, base0, l0.val[0], + l0.val[1], shifts0, shifts1, 0, 5); + HIGHBD_DR_PREDICTOR_Z3_STEP_X8(&out[1], iota2x8, base1, l1.val[0], + l1.val[1], shifts0, shifts1, 1, 5); + HIGHBD_DR_PREDICTOR_Z3_STEP_X8(&out[2], iota2x8, base2, l2.val[0], + l2.val[1], shifts0, shifts1, 2, 5); + HIGHBD_DR_PREDICTOR_Z3_STEP_X8(&out[3], iota2x8, base3, l3.val[0], + l3.val[1], shifts0, shifts1, 3, 5); + transpose_array_inplace_u16_4x8(out); + for (int r2 = 0; r2 < 4; ++r2) { + vst1_u16(dst + (r + r2) * stride + c, vget_low_u16(out[r2])); + } + for (int r2 = 0; r2 < 4; ++r2) { + vst1_u16(dst + (r + r2 + 4) * stride + c, vget_high_u16(out[r2])); + } + r += 8; + } while (r < bh); + y += 4 * dy; + c += 4; + } while (c < bw); + } +} + +// Directional prediction, zone 3: 180 < angle < 270 +void av1_highbd_dr_prediction_z3_neon(uint16_t *dst, ptrdiff_t stride, int bw, + int bh, const uint16_t *above, + const uint16_t *left, int upsample_left, + int dx, int dy, int bd) { + (void)above; + (void)dx; + (void)bd; + assert(bw % 4 == 0); + assert(bh % 4 == 0); + assert(dx == 1); + assert(dy > 0); + + if (upsample_left) { + highbd_dr_prediction_z3_upsample1_neon(dst, stride, bw, bh, left, dy); + } else { + highbd_dr_prediction_z3_upsample0_neon(dst, stride, bw, bh, left, dy); + } +} + +#undef HIGHBD_DR_PREDICTOR_Z3_STEP_X4 +#undef HIGHBD_DR_PREDICTOR_Z3_STEP_X8 |