text: // Auto-generated file. Do not edit!
  //   Template: src/f16-dwconv2d-chw/3x3s2p1-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/math.h>
  
  
  void xnn_f16_dwconv2d_chw_ukernel_3x3s2p1__neonfp16arith_2x4_acc2(
      size_t input_height,
      size_t input_width,
      const void* input,
      const void* weights,
      const void* zero,
      void* output,
      uint32_t padding_top,
      const union xnn_f16_chw_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
  {
    assert(input_height != 0);
    assert(input_width != 0);
    assert(input_width % sizeof(__fp16) == 0);
    assert(padding_top >= 0);
    assert(padding_top <= 1);
  
    const uint16x4_t vmask_even = vld1_u16(params->neonfp16arith.mask_even);
    const uint16x4_t vmask_odd  = vld1_u16(params->neonfp16arith.mask_odd);
    const float16x4_t vmax = vld1_dup_f16(&params->neonfp16arith.max);
    const float16x4_t vmin = vld1_dup_f16(&params->neonfp16arith.min);
  
    const __fp16* w0 = (const __fp16*)weights;
    const float16x8_t vw01234567 = vld1q_f16(w0);
    const float16x4_t vw89 = vreinterpret_f16_u32(vld1_lane_u32((const uint32_t*)(w0 + 8), vmov_n_u32(0), 0));
  
    const size_t input_decrement = round_down_po2(input_width, 4 /* SIMD output width */ * 2 /* subsampling */ * sizeof(__fp16));
    const size_t output_width = round_down_po2((input_width + (2 /* padding */ - 3 /* kernel size */ + 2 /* subsampling */) * sizeof(__fp16)) / 2, sizeof(__fp16));
  
    const __fp16* i0 = (const __fp16*) ((uintptr_t) input - ((-padding_top) & input_width));
    const __fp16* i1 = (const __fp16*) ((uintptr_t) i0 + input_width);
    if XNN_UNPREDICTABLE(padding_top != 0) {
      i0 = zero;
    }
    const __fp16* i2 = (const __fp16*) ((uintptr_t) i1 + input_width);
    const __fp16* i3 = (const __fp16*) ((uintptr_t) i2 + input_width);
    const __fp16* i4 = (const __fp16*) ((uintptr_t) i3 + input_width);
  
    __fp16* o0 = output;
    __fp16* o1 = (__fp16*) ((uintptr_t) o0 + output_width);
  
    size_t padded_input_height = input_height + padding_top + 1 /* padding bottom */;
    size_t output_height = (padded_input_height - 3 /* kernel size */ + 2 /* subsampling */) / 2;
    do {
      if XNN_UNPREDICTABLE(padded_input_height < 4) {
        i2 = zero;
      }
      if XNN_UNPREDICTABLE(padded_input_height < 5) {
        i3 = zero;
        o1 = o0;
      }
      if XNN_UNPREDICTABLE(padded_input_height < 6) {
        i4 = zero;
      }
  
      float16x4_t vi0x1357 = vmov_n_f16(0);
      float16x4_t vi1x1357 = vmov_n_f16(0);
      float16x4_t vi2x1357 = vmov_n_f16(0);
      float16x4_t vi3x1357 = vmov_n_f16(0);
      float16x4_t vi4x1357 = vmov_n_f16(0);
  
      size_t w = input_width;
      for (; w >= 8 * sizeof(__fp16); w -= 8 * sizeof(__fp16)) {
        float16x4_t vo0p0 = vdup_laneq_f16(vw01234567, 0);
        float16x4_t vo1p0 = vdup_laneq_f16(vw01234567, 0);
  
        const float16x4x2_t vi0x8ACE9BDF = vld2_f16(i0); i0 += 8;
        const float16x4x2_t vi1x8ACE9BDF = vld2_f16(i1); i1 += 8;
        const float16x4x2_t vi2x8ACE9BDF = vld2_f16(i2); i2 += 8;
        const float16x4x2_t vi3x8ACE9BDF = vld2_f16(i3); i3 += 8;
        const float16x4x2_t vi4x8ACE9BDF = vld2_f16(i4); i4 += 8;
  
        float16x4_t vo0p1 = vmul_laneq_f16(vi0x8ACE9BDF.val[0], vw01234567, 2);
        float16x4_t vo1p1 = vmul_laneq_f16(vi2x8ACE9BDF.val[0], vw01234567, 2);
  
        vo0p0 = vfma_laneq_f16(vo0p0, vi1x8ACE9BDF.val[0], vw01234567, 5);
        vo1p0 = vfma_laneq_f16(vo1p0, vi3x8ACE9BDF.val[0], vw01234567, 5);
  
        vo0p0 = vfma_lane_f16(vo0p0, vi2x8ACE9BDF.val[0], vw89, 0);
        vo1p0 = vfma_lane_f16(vo1p0, vi4x8ACE9BDF.val[0], vw89, 0);
  
        const float16x4_t vi0x7BDF = vext_f16(vi0x1357, vi0x8ACE9BDF.val[1], 3);
        vi0x1357 = vi0x8ACE9BDF.val[1];
        const float16x4_t vi1x7BDF = vext_f16(vi1x1357, vi1x8ACE9BDF.val[1], 3);
        vi1x1357 = vi1x8ACE9BDF.val[1];
        const float16x4_t vi2x7BDF = vext_f16(vi2x1357, vi2x8ACE9BDF.val[1], 3);
        vi2x1357 = vi2x8ACE9BDF.val[1];
        const float16x4_t vi3x7BDF = vext_f16(vi3x1357, vi3x8ACE9BDF.val[1], 3);
        vi3x1357 = vi3x8ACE9BDF.val[1];
        const float16x4_t vi4x7BDF = vext_f16(vi4x1357, vi4x8ACE9BDF.val[1], 3);
        vi4x1357 = vi4x8ACE9BDF.val[1];
  
        vo0p1 = vfma_laneq_f16(vo0p1, vi0x7BDF, vw01234567, 1);
        vo1p1 = vfma_laneq_f16(vo1p1, vi2x7BDF, vw01234567, 1);
  
        vo0p0 = vfma_laneq_f16(vo0p0, vi1x7BDF, vw01234567, 4);
        vo1p0 = vfma_laneq_f16(vo1p0, vi3x7BDF, vw01234567, 4);
  
        vo0p1 = vfma_laneq_f16(vo0p1, vi2x7BDF, vw01234567, 7);
        vo1p1 = vfma_laneq_f16(vo1p1, vi4x7BDF, vw01234567, 7);
  
        vo0p0 = vfma_laneq_f16(vo0p0, vi0x8ACE9BDF.val[1], vw01234567, 3);
        vo1p0 = vfma_laneq_f16(vo1p0, vi2x8ACE9BDF.val[1], vw01234567, 3);
  
        vo0p1 = vfma_laneq_f16(vo0p1, vi1x8ACE9BDF.val[1], vw01234567, 6);
        vo1p1 = vfma_laneq_f16(vo1p1, vi3x8ACE9BDF.val[1], vw01234567, 6);
  
        vo0p0 = vfma_lane_f16(vo0p0, vi2x8ACE9BDF.val[1], vw89, 1);
        vo1p0 = vfma_lane_f16(vo1p0, vi4x8ACE9BDF.val[1], vw89, 1);
  
        vo0p0 = vadd_f16(vo0p0, vo0p1);
        vo1p0 = vadd_f16(vo1p0, vo1p1);
  
        float16x4_t vo0 = vmax_f16(vo0p0, vmin);
        float16x4_t vo1 = vmax_f16(vo1p0, vmin);
  
        vo0 = vmin_f16(vo0, vmax);
        vo1 = vmin_f16(vo1, vmax);
  
        vst1_f16(o1, vo1); o1 += 4;
        vst1_f16(o0, vo0); o0 += 4;
      }
      // Last block has 0-7 pixels to process.
      assert(w < 8 * sizeof(__fp16));
      if XNN_LIKELY(w != 0) {
        float16x4_t vo0p0 = vdup_laneq_f16(vw01234567, 0);
        float16x4_t vo1p0 = vdup_laneq_f16(vw01234567, 0);
  
        const float16x4x2_t vi0x8ACE9BDF = vld2_f16(i0);
        const float16x4x2_t vi1x8ACE9BDF = vld2_f16(i1);
        const float16x4x2_t vi2x8ACE9BDF = vld2_f16(i2);
        const float16x4x2_t vi3x8ACE9BDF = vld2_f16(i3);
        const float16x4x2_t vi4x8ACE9BDF = vld2_f16(i4);
  
        const float16x4_t vi0x8ACE = vreinterpret_f16_u16(vand_u16(vmask_even, vreinterpret_u16_f16(vi0x8ACE9BDF.val[0])));
        const float16x4_t vi0x9BDF = vreinterpret_f16_u16(vand_u16(vmask_odd,  vreinterpret_u16_f16(vi0x8ACE9BDF.val[1])));
        const float16x4_t vi1x8ACE = vreinterpret_f16_u16(vand_u16(vmask_even, vreinterpret_u16_f16(vi1x8ACE9BDF.val[0])));
        const float16x4_t vi1x9BDF = vreinterpret_f16_u16(vand_u16(vmask_odd,  vreinterpret_u16_f16(vi1x8ACE9BDF.val[1])));
        const float16x4_t vi2x8ACE = vreinterpret_f16_u16(vand_u16(vmask_even, vreinterpret_u16_f16(vi2x8ACE9BDF.val[0])));
        const float16x4_t vi2x9BDF = vreinterpret_f16_u16(vand_u16(vmask_odd,  vreinterpret_u16_f16(vi2x8ACE9BDF.val[1])));
        const float16x4_t vi3x8ACE = vreinterpret_f16_u16(vand_u16(vmask_even, vreinterpret_u16_f16(vi3x8ACE9BDF.val[0])));
        const float16x4_t vi3x9BDF = vreinterpret_f16_u16(vand_u16(vmask_odd,  vreinterpret_u16_f16(vi3x8ACE9BDF.val[1])));
        const float16x4_t vi4x8ACE = vreinterpret_f16_u16(vand_u16(vmask_even, vreinterpret_u16_f16(vi4x8ACE9BDF.val[0])));
        const float16x4_t vi4x9BDF = vreinterpret_f16_u16(vand_u16(vmask_odd,  vreinterpret_u16_f16(vi4x8ACE9BDF.val[1])));
  
        float16x4_t vo0p1 = vmul_laneq_f16(vi0x8ACE, vw01234567, 2);
        float16x4_t vo1p1 = vmul_laneq_f16(vi2x8ACE, vw01234567, 2);
  
        vo0p0 = vfma_laneq_f16(vo0p0, vi1x8ACE, vw01234567, 5);
        vo1p0 = vfma_laneq_f16(vo1p0, vi3x8ACE, vw01234567, 5);
  
        vo0p0 = vfma_lane_f16(vo0p0, vi2x8ACE, vw89, 0);
        vo1p0 = vfma_lane_f16(vo1p0, vi4x8ACE, vw89, 0);
  
        const float16x4_t vi0x7BDF = vext_f16(vi0x1357, vi0x9BDF, 3);
        const float16x4_t vi1x7BDF = vext_f16(vi1x1357, vi1x9BDF, 3);
        const float16x4_t vi2x7BDF = vext_f16(vi2x1357, vi2x9BDF, 3);
        const float16x4_t vi3x7BDF = vext_f16(vi3x1357, vi3x9BDF, 3);
        const float16x4_t vi4x7BDF = vext_f16(vi4x1357, vi4x9BDF, 3);
  
        vo0p1 = vfma_laneq_f16(vo0p1, vi0x7BDF, vw01234567, 1);
        vo1p1 = vfma_laneq_f16(vo1p1, vi2x7BDF, vw01234567, 1);
  
        vo0p0 = vfma_laneq_f16(vo0p0, vi1x7BDF, vw01234567, 4);
        vo1p0 = vfma_laneq_f16(vo1p0, vi3x7BDF, vw01234567, 4);
  
        vo0p1 = vfma_laneq_f16(vo0p1, vi2x7BDF, vw01234567, 7);
        vo1p1 = vfma_laneq_f16(vo1p1, vi4x7BDF, vw01234567, 7);
  
        vo0p0 = vfma_laneq_f16(vo0p0, vi0x9BDF, vw01234567, 3);
        vo1p0 = vfma_laneq_f16(vo1p0, vi2x9BDF, vw01234567, 3);
  
        vo0p1 = vfma_laneq_f16(vo0p1, vi1x9BDF, vw01234567, 6);
        vo1p1 = vfma_laneq_f16(vo1p1, vi3x9BDF, vw01234567, 6);
  
        vo0p0 = vfma_lane_f16(vo0p0, vi2x9BDF, vw89, 1);
        vo1p0 = vfma_lane_f16(vo1p0, vi4x9BDF, vw89, 1);
  
        vo0p0 = vadd_f16(vo0p0, vo0p1);
        vo1p0 = vadd_f16(vo1p0, vo1p1);
  
        float16x4_t vo0 = vmax_f16(vo0p0, vmin);
        float16x4_t vo1 = vmax_f16(vo1p0, vmin);
  
        vo0 = vmin_f16(vo0, vmax);
        vo1 = vmin_f16(vo1, vmax);
  
        w += 1 * sizeof(__fp16);
  
        if XNN_LIKELY(w == 8 * sizeof(__fp16)) {
          vst1_f16(o1, vo1); o1 += 4;
          vst1_f16(o0, vo0); o0 += 4;
        } else {
          if (w & (4 * sizeof(__fp16))) {
            vst1_lane_u32((void*) o1, vreinterpret_u32_f16(vo1), 0); o1 += 2;
            vst1_lane_u32((void*) o0, vreinterpret_u32_f16(vo0), 0); o0 += 2;
  
            vo0 = vext_f16(vo0, vo0, 2);
            vo1 = vext_f16(vo1, vo1, 2);
          }
          if (w & (2 * sizeof(__fp16))) {
            vst1_lane_f16(o1, vo1, 0); o1 += 1;
            vst1_lane_f16(o0, vo0, 0); o0 += 1;
          }
        }
  
      }
  
      i0 = (const __fp16*) ((uintptr_t) i4 - input_decrement);
      i1 = (const __fp16*) ((uintptr_t) i0 + input_width);
      i2 = (const __fp16*) ((uintptr_t) i1 + input_width);
      i3 = (const __fp16*) ((uintptr_t) i2 + input_width);
      i4 = (const __fp16*) ((uintptr_t) i3 + input_width);
  
      o0 = o1;
      o1 = (__fp16*) ((uintptr_t) o0 + output_width);
  
      output_height = doz(output_height, 2);
      padded_input_height = doz(padded_input_height, 4);
    } while (output_height != 0);
  }
  