text: // Auto-generated file. Do not edit!
  //   Template: src/f32-dwconv2d-chw/3x3p1-neon.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_f32_dwconv2d_chw_ukernel_3x3p1__neonfma_1x4_acc2(
      size_t input_height,
      size_t input_width,
      const float* input,
      const float* weights,
      const float* zero,
      float* output,
      uint32_t padding_top,
      const union xnn_f32_chw_params params[restrict XNN_MIN_ELEMENTS(1)])
  {
    assert(input_height != 0);
    assert(input_width != 0);
    assert(input_width % sizeof(float) == 0);
    assert(padding_top == 1);
  
    const uint32x4_t vmask = vld1q_u32(params->neon.mask);
    const float32x4_t vmax = vld1q_dup_f32(&params->neon.max);
    const float32x4_t vmin = vld1q_dup_f32(&params->neon.min);
  
    const float32x4_t vw0123 = vld1q_f32(weights);
    const float32x4_t vw4567 = vld1q_f32(weights + 4);
    const float32x2_t vw89 = vld1_f32(weights + 8);
  
    const size_t input_decrement = round_up_po2(input_width, 4 * sizeof(float));
  
    const float* i0 = zero;
    const float* i1 = input;
    const float* i2 = (const float*) ((uintptr_t) i1 + input_width);
  
    float* o0 = output;
  
    size_t output_height = input_height;
    do {
      if XNN_UNPREDICTABLE(output_height < 2) {
        i2 = zero;
      }
  
      float32x4_t vi0x0123 = vmovq_n_f32(0.0f);
      float32x4_t vi1x0123 = vmovq_n_f32(0.0f);
      float32x4_t vi2x0123 = vmovq_n_f32(0.0f);
  
      float32x4_t vi0x4567 = vld1q_f32(i0); i0 += 4;
      float32x4_t vi1x4567 = vld1q_f32(i1); i1 += 4;
      float32x4_t vi2x4567 = vld1q_f32(i2); i2 += 4;
  
      size_t w = input_width;
      for (; w > 4 * sizeof(float); w -= 4 * sizeof(float)) {
        float32x4_t vo0p0 = vdupq_lane_f32(vget_low_f32(vw0123), 0);
  
        const float32x4_t vi0x89AB = vld1q_f32(i0); i0 += 4;
        const float32x4_t vi1x89AB = vld1q_f32(i1); i1 += 4;
        const float32x4_t vi2x89AB = vld1q_f32(i2); i2 += 4;
  
        vo0p0 = vfmaq_lane_f32(vo0p0, vi0x4567, vget_high_f32(vw0123), 0);
  
        float32x4_t vo0p1 = vmulq_lane_f32(vi1x4567, vget_low_f32(vw4567), 1);
  
        vo0p0 = vfmaq_lane_f32(vo0p0, vi2x4567, vw89, 0);
  
        const float32x4_t vi0x3456 = vextq_f32(vi0x0123, vi0x4567, 3);
        const float32x4_t vi1x3456 = vextq_f32(vi1x0123, vi1x4567, 3);
        const float32x4_t vi2x3456 = vextq_f32(vi2x0123, vi2x4567, 3);
  
        vo0p1 = vfmaq_lane_f32(vo0p1, vi0x3456, vget_low_f32(vw0123), 1);
  
        vo0p0 = vfmaq_lane_f32(vo0p0, vi1x3456, vget_low_f32(vw4567), 0);
  
        vo0p1 = vfmaq_lane_f32(vo0p1, vi2x3456, vget_high_f32(vw4567), 1);
  
        vi0x0123 = vi0x4567;
        vi1x0123 = vi1x4567;
        vi2x0123 = vi2x4567;
  
        const float32x4_t vi0x5678 = vextq_f32(vi0x4567, vi0x89AB, 1);
        const float32x4_t vi1x5678 = vextq_f32(vi1x4567, vi1x89AB, 1);
        const float32x4_t vi2x5678 = vextq_f32(vi2x4567, vi2x89AB, 1);
  
        vo0p0 = vfmaq_lane_f32(vo0p0, vi0x5678, vget_high_f32(vw0123), 1);
  
        vo0p1 = vfmaq_lane_f32(vo0p1, vi1x5678, vget_high_f32(vw4567), 0);
  
        vo0p0 = vfmaq_lane_f32(vo0p0, vi2x5678, vw89, 1);
  
        vi0x4567 = vi0x89AB;
        vi1x4567 = vi1x89AB;
        vi2x4567 = vi2x89AB;
  
        vo0p0 = vaddq_f32(vo0p0, vo0p1);
  
        float32x4_t vo0 = vmaxq_f32(vo0p0, vmin);
  
        vo0 = vminq_f32(vo0, vmax);
  
        vst1q_f32(o0, vo0); o0 += 4;
      }
      // Always process the last block of 1..4 pixels.
      assert(w >= 1 * sizeof(float));
      assert(w <= 4 * sizeof(float));
      {
        float32x4_t vo0p0 = vdupq_lane_f32(vget_low_f32(vw0123), 0);
  
        vi0x4567 = vreinterpretq_f32_u32(vandq_u32(vmask, vreinterpretq_u32_f32(vi0x4567)));
        vi1x4567 = vreinterpretq_f32_u32(vandq_u32(vmask, vreinterpretq_u32_f32(vi1x4567)));
        vi2x4567 = vreinterpretq_f32_u32(vandq_u32(vmask, vreinterpretq_u32_f32(vi2x4567)));
  
        vo0p0 = vfmaq_lane_f32(vo0p0, vi0x4567, vget_high_f32(vw0123), 0);
  
        float32x4_t vo0p1 = vmulq_lane_f32(vi1x4567, vget_low_f32(vw4567), 1);
  
        vo0p0 = vfmaq_lane_f32(vo0p0, vi2x4567, vw89, 0);
  
        const float32x4_t vi0x3456 = vextq_f32(vi0x0123, vi0x4567, 3);
        const float32x4_t vi1x3456 = vextq_f32(vi1x0123, vi1x4567, 3);
        const float32x4_t vi2x3456 = vextq_f32(vi2x0123, vi2x4567, 3);
  
        vo0p1 = vfmaq_lane_f32(vo0p1, vi0x3456, vget_low_f32(vw0123), 1);
  
        vo0p0 = vfmaq_lane_f32(vo0p0, vi1x3456, vget_low_f32(vw4567), 0);
  
        vo0p1 = vfmaq_lane_f32(vo0p1, vi2x3456, vget_high_f32(vw4567), 1);
  
        const float32x4_t vzero = vmovq_n_f32(0.0f);
        const float32x4_t vi0x5678 = vextq_f32(vi0x4567, vzero, 1);
        const float32x4_t vi1x5678 = vextq_f32(vi1x4567, vzero, 1);
        const float32x4_t vi2x5678 = vextq_f32(vi2x4567, vzero, 1);
  
        vo0p0 = vfmaq_lane_f32(vo0p0, vi0x5678, vget_high_f32(vw0123), 1);
  
        vo0p1 = vfmaq_lane_f32(vo0p1, vi1x5678, vget_high_f32(vw4567), 0);
  
        vo0p0 = vfmaq_lane_f32(vo0p0, vi2x5678, vw89, 1);
  
        vo0p0 = vaddq_f32(vo0p0, vo0p1);
  
        float32x4_t vo0 = vmaxq_f32(vo0p0, vmin);
  
        vo0 = vminq_f32(vo0, vmax);
  
        if XNN_LIKELY(w == 4 * sizeof(float)) {
          vst1q_f32(o0, vo0); o0 += 4;
        } else {
          float32x2_t vo0_lo = vget_low_f32(vo0);
          if (w & (2 * sizeof(float))) {
            vst1_f32(o0, vo0_lo); o0 += 2;
  
            vo0_lo = vget_high_f32(vo0);
          }
          if (w & (1 * sizeof(float))) {
            vst1_lane_f32(o0, vo0_lo, 0); o0 += 1;
          }
        }
      }
  
      i0 = (const float*) ((uintptr_t) i1 - input_decrement);
      i1 = (const float*) ((uintptr_t) i2 - input_decrement);
      i2 = (const float*) ((uintptr_t) i1 + input_width);
  
  
    } while (--output_height != 0);
  }
  