// Auto-generated file. Do not edit!
//   Template: src/f16-dwconv2d-chw/3x3p1-neonfp16arith.c.in
//   Generator: tools/xngen
//
// Copyright 2020 Google LLC
//
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree.

#include <assert.h>

#include <arm_neon.h>

#include "xnnpack/dwconv.h"
#include "xnnpack/intrinsics-polyfill.h"
#include "xnnpack/math.h"


void xnn_f16_dwconv2d_chw_ukernel_3x3p1__neonfp16arith_2x8_acc2(
    size_t input_height,
    size_t input_width,
    const xnn_float16* input,
    const xnn_float16* weights,
    const xnn_float16* zero,
    xnn_float16* output,
    uint32_t padding_top,
    const union xnn_f16_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(input_height != 0);
  assert(input_width != 0);
  assert(input_width % sizeof(uint16_t) == 0);
  assert(padding_top == 1);

  #if XNN_ARCH_ARM64
    const uint16x8x2_t vminmax = vld2q_dup_u16((const uint16_t*) &params->scalar.min);
    const float16x8_t vmin = vreinterpretq_f16_u16(vminmax.val[0]);
    const float16x8_t vmax = vreinterpretq_f16_u16(vminmax.val[1]);
  #else
    // vld2_dup is to work around aarch32 clang bug with vld1q_dup
    const uint16x4x2_t vminmax = vld2_dup_u16((const uint16_t*) &params->scalar.min);
    const float16x8_t vmin = vreinterpretq_f16_u16(vcombine_u16(vminmax.val[0], vminmax.val[0]));
    const float16x8_t vmax = vreinterpretq_f16_u16(vcombine_u16(vminmax.val[1], vminmax.val[1]));
  #endif

  static const int16_t mask_table[15] = {-1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0};
  const uint16x8_t vmask = vld1q_u16((const uint16_t*) &mask_table[7 - (((input_width >> 1) - 1) & 7)]);

  const uint16_t* w = (const uint16_t*) weights;
  const float16x8_t vw01234567 = vreinterpretq_f16_u16(vld1q_u16(w));
  const float16x4_t vw89 = vreinterpret_f16_u32(vld1_dup_u32((const void*) (w + 8)));

  const size_t input_decrement = round_up_po2(input_width, 8 * sizeof(uint16_t));

  const uint16_t* i0 = (const uint16_t*) zero;
  const uint16_t* i1 = (const uint16_t*) input;
  const uint16_t* i2 = (const uint16_t*) ((uintptr_t) i1 + input_width);
  const uint16_t* i3 = (const uint16_t*) ((uintptr_t) i2 + input_width);

  uint16_t* o0 = (uint16_t*) output;
  uint16_t* o1 = (uint16_t*) ((uintptr_t) o0 + input_width);

  size_t output_height = input_height;
  do {
    if XNN_UNPREDICTABLE(output_height < 2) {
      i2 = (const uint16_t*) zero;
      o1 = o0;
    }
    if XNN_UNPREDICTABLE(output_height < 3) {
      i3 = (const uint16_t*) zero;
    }

    float16x8_t vi0x01234567 = vreinterpretq_f16_u16(vmovq_n_u16(0));
    float16x8_t vi1x01234567 = vreinterpretq_f16_u16(vmovq_n_u16(0));
    float16x8_t vi2x01234567 = vreinterpretq_f16_u16(vmovq_n_u16(0));
    float16x8_t vi3x01234567 = vreinterpretq_f16_u16(vmovq_n_u16(0));

    float16x8_t vi0x89ABCDEF = vreinterpretq_f16_u16(vld1q_u16(i0)); i0 += 8;
    float16x8_t vi1x89ABCDEF = vreinterpretq_f16_u16(vld1q_u16(i1)); i1 += 8;
    float16x8_t vi2x89ABCDEF = vreinterpretq_f16_u16(vld1q_u16(i2)); i2 += 8;
    float16x8_t vi3x89ABCDEF = vreinterpretq_f16_u16(vld1q_u16(i3)); i3 += 8;

    size_t w = input_width;
    for (; w > 8 * sizeof(uint16_t); w -= 8 * sizeof(uint16_t)) {
      float16x8_t vo0p0 = vdupq_lane_f16(vget_low_f16(vw01234567), 0);
      float16x8_t vo1p0 = vdupq_lane_f16(vget_low_f16(vw01234567), 0);

      const float16x8_t vi0xGHIJKLMN = vreinterpretq_f16_u16(vld1q_u16(i0)); i0 += 8;
      const float16x8_t vi1xGHIJKLMN = vreinterpretq_f16_u16(vld1q_u16(i1)); i1 += 8;
      const float16x8_t vi2xGHIJKLMN = vreinterpretq_f16_u16(vld1q_u16(i2)); i2 += 8;
      const float16x8_t vi3xGHIJKLMN = vreinterpretq_f16_u16(vld1q_u16(i3)); i3 += 8;

      // Center column
      #if XNN_ARCH_ARM64
        vo0p0 = vfmaq_laneq_f16(vo0p0, vi0x89ABCDEF, vw01234567, 2);
      #else
        vo0p0 = vmlaq_lane_f16(vo0p0, vi0x89ABCDEF, vget_low_f16(vw01234567), 2);
      #endif
      #if XNN_ARCH_ARM64
        vo1p0 = vfmaq_laneq_f16(vo1p0, vi1x89ABCDEF, vw01234567, 2);
      #else
        vo1p0 = vmlaq_lane_f16(vo1p0, vi1x89ABCDEF, vget_low_f16(vw01234567), 2);
      #endif
      float16x8_t vo0p1 = vmulq_lane_f16(vi1x89ABCDEF, vget_high_f16(vw01234567), 1);
      float16x8_t vo1p1 = vmulq_lane_f16(vi2x89ABCDEF, vget_high_f16(vw01234567), 1);
      #if XNN_ARCH_ARM64
        vo0p0 = vfmaq_lane_f16(vo0p0, vi2x89ABCDEF, vw89, 0);
      #else
        vo0p0 = vmlaq_lane_f16(vo0p0, vi2x89ABCDEF, vw89, 0);
      #endif
      #if XNN_ARCH_ARM64
        vo1p0 = vfmaq_lane_f16(vo1p0, vi3x89ABCDEF, vw89, 0);
      #else
        vo1p0 = vmlaq_lane_f16(vo1p0, vi3x89ABCDEF, vw89, 0);
      #endif
      // Left column
      const float16x8_t vi0x789ABCDE = vextq_f16(vi0x01234567, vi0x89ABCDEF, 7);
      const float16x8_t vi1x789ABCDE = vextq_f16(vi1x01234567, vi1x89ABCDEF, 7);
      const float16x8_t vi2x789ABCDE = vextq_f16(vi2x01234567, vi2x89ABCDEF, 7);
      const float16x8_t vi3x789ABCDE = vextq_f16(vi3x01234567, vi3x89ABCDEF, 7);

      #if XNN_ARCH_ARM64
        vo0p1 = vfmaq_laneq_f16(vo0p1, vi0x789ABCDE, vw01234567, 1);
      #else
        vo0p1 = vmlaq_lane_f16(vo0p1, vi0x789ABCDE, vget_low_f16(vw01234567), 1);
      #endif
      #if XNN_ARCH_ARM64
        vo1p1 = vfmaq_laneq_f16(vo1p1, vi1x789ABCDE, vw01234567, 1);
      #else
        vo1p1 = vmlaq_lane_f16(vo1p1, vi1x789ABCDE, vget_low_f16(vw01234567), 1);
      #endif
      #if XNN_ARCH_ARM64
        vo0p0 = vfmaq_laneq_f16(vo0p0, vi1x789ABCDE, vw01234567, 4);
      #else
        vo0p0 = vmlaq_lane_f16(vo0p0, vi1x789ABCDE, vget_high_f16(vw01234567), 0);
      #endif
      #if XNN_ARCH_ARM64
        vo1p0 = vfmaq_laneq_f16(vo1p0, vi2x789ABCDE, vw01234567, 4);
      #else
        vo1p0 = vmlaq_lane_f16(vo1p0, vi2x789ABCDE, vget_high_f16(vw01234567), 0);
      #endif
      #if XNN_ARCH_ARM64
        vo0p1 = vfmaq_laneq_f16(vo0p1, vi2x789ABCDE, vw01234567, 7);
      #else
        vo0p1 = vmlaq_lane_f16(vo0p1, vi2x789ABCDE, vget_high_f16(vw01234567), 3);
      #endif
      #if XNN_ARCH_ARM64
        vo1p1 = vfmaq_laneq_f16(vo1p1, vi3x789ABCDE, vw01234567, 7);
      #else
        vo1p1 = vmlaq_lane_f16(vo1p1, vi3x789ABCDE, vget_high_f16(vw01234567), 3);
      #endif
      vi0x01234567 = vi0x89ABCDEF;
      vi1x01234567 = vi1x89ABCDEF;
      vi2x01234567 = vi2x89ABCDEF;
      vi3x01234567 = vi3x89ABCDEF;

      // Right column
      const float16x8_t vi0x9ABCDEFG = vextq_f16(vi0x89ABCDEF, vi0xGHIJKLMN, 1);
      const float16x8_t vi1x9ABCDEFG = vextq_f16(vi1x89ABCDEF, vi1xGHIJKLMN, 1);
      const float16x8_t vi2x9ABCDEFG = vextq_f16(vi2x89ABCDEF, vi2xGHIJKLMN, 1);
      const float16x8_t vi3x9ABCDEFG = vextq_f16(vi3x89ABCDEF, vi3xGHIJKLMN, 1);

      #if XNN_ARCH_ARM64
        vo0p0 = vfmaq_laneq_f16(vo0p0, vi0x9ABCDEFG, vw01234567, 3);
      #else
        vo0p0 = vmlaq_lane_f16(vo0p0, vi0x9ABCDEFG, vget_low_f16(vw01234567), 3);
      #endif
      #if XNN_ARCH_ARM64
        vo1p0 = vfmaq_laneq_f16(vo1p0, vi1x9ABCDEFG, vw01234567, 3);
      #else
        vo1p0 = vmlaq_lane_f16(vo1p0, vi1x9ABCDEFG, vget_low_f16(vw01234567), 3);
      #endif
      #if XNN_ARCH_ARM64
        vo0p1 = vfmaq_laneq_f16(vo0p1, vi1x9ABCDEFG, vw01234567, 6);
      #else
        vo0p1 = vmlaq_lane_f16(vo0p1, vi1x9ABCDEFG, vget_high_f16(vw01234567), 2);
      #endif
      #if XNN_ARCH_ARM64
        vo1p1 = vfmaq_laneq_f16(vo1p1, vi2x9ABCDEFG, vw01234567, 6);
      #else
        vo1p1 = vmlaq_lane_f16(vo1p1, vi2x9ABCDEFG, vget_high_f16(vw01234567), 2);
      #endif
      #if XNN_ARCH_ARM64
        vo0p0 = vfmaq_lane_f16(vo0p0, vi2x9ABCDEFG, vw89, 1);
      #else
        vo0p0 = vmlaq_lane_f16(vo0p0, vi2x9ABCDEFG, vw89, 1);
      #endif
      #if XNN_ARCH_ARM64
        vo1p0 = vfmaq_lane_f16(vo1p0, vi3x9ABCDEFG, vw89, 1);
      #else
        vo1p0 = vmlaq_lane_f16(vo1p0, vi3x9ABCDEFG, vw89, 1);
      #endif
      vi0x89ABCDEF = vi0xGHIJKLMN;
      vi1x89ABCDEF = vi1xGHIJKLMN;
      vi2x89ABCDEF = vi2xGHIJKLMN;
      vi3x89ABCDEF = vi3xGHIJKLMN;

      vo0p0 = vaddq_f16(vo0p0, vo0p1);
      vo1p0 = vaddq_f16(vo1p0, vo1p1);

      float16x8_t vo0 = vmaxq_f16(vo0p0, vmin);
      float16x8_t vo1 = vmaxq_f16(vo1p0, vmin);

      vo0 = vminq_f16(vo0, vmax);
      vo1 = vminq_f16(vo1, vmax);

      vst1q_u16(o1, vreinterpretq_u16_f16(vo1)); o1 += 8;
      vst1q_u16(o0, vreinterpretq_u16_f16(vo0)); o0 += 8;
    }

    // Always process the last block of 1..8 pixels.
    assert(w >= 1 * sizeof(uint16_t));
    assert(w <= 8 * sizeof(uint16_t));
    {
      float16x8_t vo0p0 = vdupq_lane_f16(vget_low_f16(vw01234567), 0);
      float16x8_t vo1p0 = vdupq_lane_f16(vget_low_f16(vw01234567), 0);

      vi0x89ABCDEF = vreinterpretq_f16_u16(vandq_u16(vmask, vreinterpretq_u16_f16(vi0x89ABCDEF)));
      vi1x89ABCDEF = vreinterpretq_f16_u16(vandq_u16(vmask, vreinterpretq_u16_f16(vi1x89ABCDEF)));
      vi2x89ABCDEF = vreinterpretq_f16_u16(vandq_u16(vmask, vreinterpretq_u16_f16(vi2x89ABCDEF)));
      vi3x89ABCDEF = vreinterpretq_f16_u16(vandq_u16(vmask, vreinterpretq_u16_f16(vi3x89ABCDEF)));

      // Center column
      #if XNN_ARCH_ARM64
        vo0p0 = vfmaq_laneq_f16(vo0p0, vi0x89ABCDEF, vw01234567, 2);
      #else
        vo0p0 = vmlaq_lane_f16(vo0p0, vi0x89ABCDEF, vget_low_f16(vw01234567), 2);
      #endif
      #if XNN_ARCH_ARM64
        vo1p0 = vfmaq_laneq_f16(vo1p0, vi1x89ABCDEF, vw01234567, 2);
      #else
        vo1p0 = vmlaq_lane_f16(vo1p0, vi1x89ABCDEF, vget_low_f16(vw01234567), 2);
      #endif
      float16x8_t vo0p1 = vmulq_lane_f16(vi1x89ABCDEF, vget_high_f16(vw01234567), 1);
      float16x8_t vo1p1 = vmulq_lane_f16(vi2x89ABCDEF, vget_high_f16(vw01234567), 1);
      #if XNN_ARCH_ARM64
        vo0p0 = vfmaq_lane_f16(vo0p0, vi2x89ABCDEF, vw89, 0);
      #else
        vo0p0 = vmlaq_lane_f16(vo0p0, vi2x89ABCDEF, vw89, 0);
      #endif
      #if XNN_ARCH_ARM64
        vo1p0 = vfmaq_lane_f16(vo1p0, vi3x89ABCDEF, vw89, 0);
      #else
        vo1p0 = vmlaq_lane_f16(vo1p0, vi3x89ABCDEF, vw89, 0);
      #endif
      // Left column
      const float16x8_t vi0x789ABCDE = vextq_f16(vi0x01234567, vi0x89ABCDEF, 7);
      const float16x8_t vi1x789ABCDE = vextq_f16(vi1x01234567, vi1x89ABCDEF, 7);
      const float16x8_t vi2x789ABCDE = vextq_f16(vi2x01234567, vi2x89ABCDEF, 7);
      const float16x8_t vi3x789ABCDE = vextq_f16(vi3x01234567, vi3x89ABCDEF, 7);

      #if XNN_ARCH_ARM64
        vo0p1 = vfmaq_laneq_f16(vo0p1, vi0x789ABCDE, vw01234567, 1);
      #else
        vo0p1 = vmlaq_lane_f16(vo0p1, vi0x789ABCDE, vget_low_f16(vw01234567), 1);
      #endif
      #if XNN_ARCH_ARM64
        vo1p1 = vfmaq_laneq_f16(vo1p1, vi1x789ABCDE, vw01234567, 1);
      #else
        vo1p1 = vmlaq_lane_f16(vo1p1, vi1x789ABCDE, vget_low_f16(vw01234567), 1);
      #endif
      #if XNN_ARCH_ARM64
        vo0p0 = vfmaq_laneq_f16(vo0p0, vi1x789ABCDE, vw01234567, 4);
      #else
        vo0p0 = vmlaq_lane_f16(vo0p0, vi1x789ABCDE, vget_high_f16(vw01234567), 0);
      #endif
      #if XNN_ARCH_ARM64
        vo1p0 = vfmaq_laneq_f16(vo1p0, vi2x789ABCDE, vw01234567, 4);
      #else
        vo1p0 = vmlaq_lane_f16(vo1p0, vi2x789ABCDE, vget_high_f16(vw01234567), 0);
      #endif
      #if XNN_ARCH_ARM64
        vo0p1 = vfmaq_laneq_f16(vo0p1, vi2x789ABCDE, vw01234567, 7);
      #else
        vo0p1 = vmlaq_lane_f16(vo0p1, vi2x789ABCDE, vget_high_f16(vw01234567), 3);
      #endif
      #if XNN_ARCH_ARM64
        vo1p1 = vfmaq_laneq_f16(vo1p1, vi3x789ABCDE, vw01234567, 7);
      #else
        vo1p1 = vmlaq_lane_f16(vo1p1, vi3x789ABCDE, vget_high_f16(vw01234567), 3);
      #endif
      // Right column
      const float16x8_t vzero = vreinterpretq_f16_u16(vmovq_n_u16(0));
      const float16x8_t vi0x9ABCDEFG = vextq_f16(vi0x89ABCDEF, vzero, 1);
      const float16x8_t vi1x9ABCDEFG = vextq_f16(vi1x89ABCDEF, vzero, 1);
      const float16x8_t vi2x9ABCDEFG = vextq_f16(vi2x89ABCDEF, vzero, 1);
      const float16x8_t vi3x9ABCDEFG = vextq_f16(vi3x89ABCDEF, vzero, 1);

      #if XNN_ARCH_ARM64
        vo0p0 = vfmaq_laneq_f16(vo0p0, vi0x9ABCDEFG, vw01234567, 3);
      #else
        vo0p0 = vmlaq_lane_f16(vo0p0, vi0x9ABCDEFG, vget_low_f16(vw01234567), 3);
      #endif
      #if XNN_ARCH_ARM64
        vo1p0 = vfmaq_laneq_f16(vo1p0, vi1x9ABCDEFG, vw01234567, 3);
      #else
        vo1p0 = vmlaq_lane_f16(vo1p0, vi1x9ABCDEFG, vget_low_f16(vw01234567), 3);
      #endif
      #if XNN_ARCH_ARM64
        vo0p1 = vfmaq_laneq_f16(vo0p1, vi1x9ABCDEFG, vw01234567, 6);
      #else
        vo0p1 = vmlaq_lane_f16(vo0p1, vi1x9ABCDEFG, vget_high_f16(vw01234567), 2);
      #endif
      #if XNN_ARCH_ARM64
        vo1p1 = vfmaq_laneq_f16(vo1p1, vi2x9ABCDEFG, vw01234567, 6);
      #else
        vo1p1 = vmlaq_lane_f16(vo1p1, vi2x9ABCDEFG, vget_high_f16(vw01234567), 2);
      #endif
      #if XNN_ARCH_ARM64
        vo0p0 = vfmaq_lane_f16(vo0p0, vi2x9ABCDEFG, vw89, 1);
      #else
        vo0p0 = vmlaq_lane_f16(vo0p0, vi2x9ABCDEFG, vw89, 1);
      #endif
      #if XNN_ARCH_ARM64
        vo1p0 = vfmaq_lane_f16(vo1p0, vi3x9ABCDEFG, vw89, 1);
      #else
        vo1p0 = vmlaq_lane_f16(vo1p0, vi3x9ABCDEFG, vw89, 1);
      #endif
      vo0p0 = vaddq_f16(vo0p0, vo0p1);
      vo1p0 = vaddq_f16(vo1p0, vo1p1);

      float16x8_t vo0 = vmaxq_f16(vo0p0, vmin);
      float16x8_t vo1 = vmaxq_f16(vo1p0, vmin);

      vo0 = vminq_f16(vo0, vmax);
      vo1 = vminq_f16(vo1, vmax);

      if XNN_LIKELY(w == 8 * sizeof(uint16_t)) {
        vst1q_u16(o1, vreinterpretq_u16_f16(vo1)); o1 += 8;
        vst1q_u16(o0, vreinterpretq_u16_f16(vo0)); o0 += 8;
      } else {
        float16x4_t vo1_lo = vget_low_f16(vo1);
        float16x4_t vo0_lo = vget_low_f16(vo0);

        if (w & (4 * sizeof(uint16_t))) {
         vst1_u16(o1, vreinterpret_u16_f16(vo1_lo)); o1 += 4;
         vst1_u16(o0, vreinterpret_u16_f16(vo0_lo)); o0 += 4;

          vo1_lo = vget_high_f16(vo1);
          vo0_lo = vget_high_f16(vo0);
        }
        if (w & (2 * sizeof(uint16_t))) {
          vst1_lane_u32((void*) o1, vreinterpret_u32_f16(vo1_lo), 0); o1 += 2;
          vst1_lane_u32((void*) o0, vreinterpret_u32_f16(vo0_lo), 0); o0 += 2;

          vo0_lo = vext_f16(vo0_lo, vo0_lo, 2);
          vo1_lo = vext_f16(vo1_lo, vo1_lo, 2);
        }
        if (w & (1 * sizeof(uint16_t))) {
          vst1_lane_u16(o1, vreinterpret_u16_f16(vo1_lo), 0); o1 += 1;
          vst1_lane_u16(o0, vreinterpret_u16_f16(vo0_lo), 0); o0 += 1;
        }
      }
    }

    i0 = (const uint16_t*) ((uintptr_t) i2 - input_decrement);
    i1 = (const uint16_t*) ((uintptr_t) i3 - input_decrement);
    i2 = (const uint16_t*) ((uintptr_t) i1 + input_width);
    i3 = (const uint16_t*) ((uintptr_t) i2 + input_width);

    o0 = o1;
    o1 = (uint16_t*) ((uintptr_t) o0 + input_width);

    output_height = doz(output_height, 2);
  } while (output_height != 0);
}
