// Auto-generated file. Do not edit!
//   Template: src/qs8-vlrelu/scalar-select.c.in
//   Generator: tools/xngen
//
// Copyright 2022 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 "xnnpack/math.h"
#include "xnnpack/vunary.h"


void xnn_qu8_vlrelu_ukernel__scalar_select_u4(
    size_t batch,
    const uint8_t* input,
    uint8_t* output,
    const struct xnn_qu8_lrelu_params params[restrict XNN_MIN_ELEMENTS(1)])
{
  assert(batch != 0);
  assert(batch % sizeof(uint8_t) == 0);
  assert(input != NULL);
  assert(output != NULL);

  const int32_t vinput_zero_point = params->scalar.input_zero_point;
  const int32_t vpositive_multiplier = params->scalar.positive_multiplier;
  const int32_t vnegative_multiplier = params->scalar.negative_multiplier;
  const int32_t vbias = (int32_t) (((uint32_t) (int32_t) params->scalar.output_zero_point) << 8) + 0x80;
  for (; batch >= 4 * sizeof(uint8_t); batch -= 4 * sizeof(uint8_t)) {
    int32_t vacc0 = (int32_t) input[0];
    int32_t vacc1 = (int32_t) input[1];
    int32_t vacc2 = (int32_t) input[2];
    int32_t vacc3 = (int32_t) input[3];
    input += 4;

    vacc0 -= vinput_zero_point;
    vacc1 -= vinput_zero_point;
    vacc2 -= vinput_zero_point;
    vacc3 -= vinput_zero_point;

    const int32_t vmultiplier0 = XNN_UNPREDICTABLE(vacc0 >= 0) ? vpositive_multiplier : vnegative_multiplier;
    const int32_t vmultiplier1 = XNN_UNPREDICTABLE(vacc1 >= 0) ? vpositive_multiplier : vnegative_multiplier;
    const int32_t vmultiplier2 = XNN_UNPREDICTABLE(vacc2 >= 0) ? vpositive_multiplier : vnegative_multiplier;
    const int32_t vmultiplier3 = XNN_UNPREDICTABLE(vacc3 >= 0) ? vpositive_multiplier : vnegative_multiplier;

    vacc0 = vbias + vacc0 * vmultiplier0;
    vacc1 = vbias + vacc1 * vmultiplier1;
    vacc2 = vbias + vacc2 * vmultiplier2;
    vacc3 = vbias + vacc3 * vmultiplier3;

    int32_t vout0 = math_asr_s32(vacc0, 8);
    int32_t vout1 = math_asr_s32(vacc1, 8);
    int32_t vout2 = math_asr_s32(vacc2, 8);
    int32_t vout3 = math_asr_s32(vacc3, 8);

    vout0 = math_max_s32(vout0, 0);
    vout1 = math_max_s32(vout1, 0);
    vout2 = math_max_s32(vout2, 0);
    vout3 = math_max_s32(vout3, 0);

    vout0 = math_min_s32(vout0, 255);
    vout1 = math_min_s32(vout1, 255);
    vout2 = math_min_s32(vout2, 255);
    vout3 = math_min_s32(vout3, 255);

    output[0] = (uint8_t) vout0;
    output[1] = (uint8_t) vout1;
    output[2] = (uint8_t) vout2;
    output[3] = (uint8_t) vout3;
    output += 4;
  }
  if XNN_UNLIKELY(batch != 0) {
    do {
      int32_t vacc = (int32_t) *input++ - vinput_zero_point;
      const int32_t vmultiplier = XNN_UNPREDICTABLE(vacc >= 0) ? vpositive_multiplier : vnegative_multiplier;
      vacc = vbias + vacc * vmultiplier;

      int32_t vout = math_asr_s32(vacc, 8);
      vout = math_max_s32(vout, 0);
      vout = math_min_s32(vout, 255);
      *output++ = (uint8_t) vout;

      batch -= sizeof(uint8_t);
    } while (batch != 0);
  }
}