src/f32-clamp/gen/neon-x8.c

// Auto-generated file. Do not edit!
//   Template: src/f32-clamp/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/clamp.h>
#include <xnnpack/common.h>


void xnn_f32_clamp_ukernel__neon_x8(
    size_t n,
    const float* x,
    float* y,
    const union xnn_f32_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])
{
  assert(n != 0);
  assert(n % sizeof(float) == 0);

  const float32x4_t vy_min = vld1q_dup_f32(&params->scalar.min);
  const float32x4_t vy_max = vld1q_dup_f32(&params->scalar.max);

  for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
    float32x4_t vacc0123 = vld1q_f32(x); x += 4;
    float32x4_t vacc4567 = vld1q_f32(x); x += 4;

    vacc0123 = vmaxq_f32(vacc0123, vy_min);
    vacc4567 = vmaxq_f32(vacc4567, vy_min);

    vacc0123 = vminq_f32(vacc0123, vy_max);
    vacc4567 = vminq_f32(vacc4567, vy_max);

    vst1q_f32(y, vacc0123); y += 4;
    vst1q_f32(y, vacc4567); y += 4;
  }
  for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) {
    float32x4_t vacc = vld1q_f32(x); x += 4;
    vacc = vmaxq_f32(vacc, vy_min);
    vacc = vminq_f32(vacc, vy_max);
    vst1q_f32(y, vacc); y += 4;
  }
  if XNN_UNLIKELY(n != 0) {
    float32x4_t vacc = vld1q_f32(x);
    vacc = vmaxq_f32(vacc, vy_min);
    vacc = vminq_f32(vacc, vy_max);

    float32x2_t vacc_lo = vget_low_f32(vacc);
    if (n & (2 * sizeof(float))) {
      vst1_f32(y, vacc_lo); y += 2;
      vacc_lo = vget_high_f32(vacc);
    }
    if (n & (1 * sizeof(float))) {
      vst1_lane_f32(y, vacc_lo, 0);
    }
  }
}