text: // Auto-generated file. Do not edit!
  //   Template: src/f32-prelu/neon.c.in
  //   Generator: tools/xngen
  //
  // Copyright 2019 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/math.h>
  #include <xnnpack/prelu.h>
  
  
  void xnn_f32_prelu_ukernel__neon_2x8(
      size_t rows,
      size_t channels,
      const float*restrict input,
      size_t input_stride,
      const float*restrict weights,
      float*restrict output,
      size_t output_stride) XNN_OOB_READS
  {
    assert(rows != 0);
    assert(channels != 0);
    assert(channels % sizeof(float) == 0);
  
    const float* i0 = input;
    float* o0 = output;
    const float* i1 = (const float*) ((uintptr_t) i0 + input_stride);
    float* o1 = (float*) ((uintptr_t) o0 + output_stride);
  
    const size_t input_increment = input_stride * 2 - channels;
    const size_t output_increment = output_stride * 2 - channels;
  
    do {
      if XNN_UNPREDICTABLE(rows < 2) {
        i1 = i0;
        o1 = o0;
      }
  
      const float* w = weights;
      size_t c = channels;
      for (; c >= 8 * sizeof(float); c -= 8 * sizeof(float)) {
        const float32x4_t vw0123 = vld1q_f32(w); w += 4;
        const float32x4_t vw4567 = vld1q_f32(w); w += 4;
  
        const float32x4_t vi0x0123 = vld1q_f32(i0); i0 += 4;
        const float32x4_t vi0x4567 = vld1q_f32(i0); i0 += 4;
        const float32x4_t vi1x0123 = vld1q_f32(i1); i1 += 4;
        const float32x4_t vi1x4567 = vld1q_f32(i1); i1 += 4;
  
        float32x4_t vacc0x0123 = vmulq_f32(vi0x0123, vw0123);
        const uint32x4_t vm0x0123 = vcltq_s32(vreinterpretq_s32_f32(vi0x0123), vmovq_n_s32(0));
        float32x4_t vacc0x4567 = vmulq_f32(vi0x4567, vw4567);
        const uint32x4_t vm0x4567 = vcltq_s32(vreinterpretq_s32_f32(vi0x4567), vmovq_n_s32(0));
        float32x4_t vacc1x0123 = vmulq_f32(vi1x0123, vw0123);
        const uint32x4_t vm1x0123 = vcltq_s32(vreinterpretq_s32_f32(vi1x0123), vmovq_n_s32(0));
        float32x4_t vacc1x4567 = vmulq_f32(vi1x4567, vw4567);
        const uint32x4_t vm1x4567 = vcltq_s32(vreinterpretq_s32_f32(vi1x4567), vmovq_n_s32(0));
  
        vacc0x0123 = vbslq_f32(vm0x0123, vacc0x0123, vi0x0123);
        vacc0x4567 = vbslq_f32(vm0x4567, vacc0x4567, vi0x4567);
        vacc1x0123 = vbslq_f32(vm1x0123, vacc1x0123, vi1x0123);
        vacc1x4567 = vbslq_f32(vm1x4567, vacc1x4567, vi1x4567);
  
        vst1q_f32(o0, vacc0x0123); o0 += 4;
        vst1q_f32(o0, vacc0x4567); o0 += 4;
        vst1q_f32(o1, vacc1x0123); o1 += 4;
        vst1q_f32(o1, vacc1x4567); o1 += 4;
      }
      for (; c >= 4 * sizeof(float); c -= 4 * sizeof(float)) {
        const float32x4_t vw0123 = vld1q_f32(w); w += 4;
  
        const float32x4_t vi0x0123 = vld1q_f32(i0);
        i0 += 4;
        const float32x4_t vi1x0123 = vld1q_f32(i1);
        i1 += 4;
  
        float32x4_t vacc0x0123 = vmulq_f32(vi0x0123, vw0123);
        const uint32x4_t vm0x0123 = vcltq_s32(vreinterpretq_s32_f32(vi0x0123), vmovq_n_s32(0));
        float32x4_t vacc1x0123 = vmulq_f32(vi1x0123, vw0123);
        const uint32x4_t vm1x0123 = vcltq_s32(vreinterpretq_s32_f32(vi1x0123), vmovq_n_s32(0));
  
        vacc0x0123 = vbslq_f32(vm0x0123, vacc0x0123, vi0x0123);
        vacc1x0123 = vbslq_f32(vm1x0123, vacc1x0123, vi1x0123);
  
        vst1q_f32(o0, vacc0x0123); o0 += 4;
        vst1q_f32(o1, vacc1x0123); o1 += 4;
      }
      if XNN_UNLIKELY(c != 0) {
        const float32x4_t vw0123 = vld1q_f32(w); w += 4;
  
        const float32x4_t vi0x0123 = vld1q_f32(i0);
        i0 = (const float*) ((uintptr_t) i0 + c);
        const float32x4_t vi1x0123 = vld1q_f32(i1);
        i1 = (const float*) ((uintptr_t) i1 + c);
  
        float32x4_t vacc0x0123 = vmulq_f32(vi0x0123, vw0123);
        const uint32x4_t vm0x0123 = vcltq_s32(vreinterpretq_s32_f32(vi0x0123), vmovq_n_s32(0));
        float32x4_t vacc1x0123 = vmulq_f32(vi1x0123, vw0123);
        const uint32x4_t vm1x0123 = vcltq_s32(vreinterpretq_s32_f32(vi1x0123), vmovq_n_s32(0));
  
        vacc0x0123 = vbslq_f32(vm0x0123, vacc0x0123, vi0x0123);
        vacc1x0123 = vbslq_f32(vm1x0123, vacc1x0123, vi1x0123);
  
        float32x2_t vacc0x01 = vget_low_f32(vacc0x0123);
        float32x2_t vacc1x01 = vget_low_f32(vacc1x0123);
        if (c & (2 * sizeof(float))) {
          vst1_f32(o0, vacc0x01); o0 += 2;
          vst1_f32(o1, vacc1x01); o1 += 2;
  
          vacc0x01 = vget_high_f32(vacc0x0123);
          vacc1x01 = vget_high_f32(vacc1x0123);
        }
        if (c & (1 * sizeof(float))) {
          vst1_lane_f32(o0, vacc0x01, 0); o0 += 1;
          vst1_lane_f32(o1, vacc1x01, 0); o1 += 1;
        }
      }
      i0 = (const float*) ((uintptr_t) i0 + input_increment);
      o0 = (float*) ((uintptr_t) o0 + output_increment);
      i1 = (const float*) ((uintptr_t) i1 + input_increment);
      o1 = (float*) ((uintptr_t) o1 + output_increment);
      rows = doz(rows, 2);
    } while (rows != 0);
  }
  