// Auto-generated file. Do not edit!
//   Template: src/f32-vtanh/avx-expm1minus.c.in
//   Generator: tools/xngen
//
// Copyright 2023 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 <stddef.h>
#include <stdint.h>

#include <immintrin.h>

#include <xnnpack/common.h>
#include <xnnpack/microparams.h>
#include <xnnpack/vunary.h>

void xnn_f32_vtanh_ukernel__avx_expm1minus_rr1_p6h5ts_nr2_u8(
    size_t batch,
    const float* input,
    float* output,
    const union xnn_f32_tanh_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(batch != 0);
  assert(batch % sizeof(float) == 0);
  assert(input != NULL);
  assert(output != NULL);

  const __m256 vsign_mask = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.sign_mask);
  const __m256 vsat_cutoff = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.sat_cutoff);
  const __m256 vlog2e = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.log2e);
  const __m256 vmagic_bias = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.magic_bias);
  const __m256 vminus_ln2 = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.minus_ln2);
  const __m256 vc6 = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.c6);
  const __m256 vc5 = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.c5);
  const __m256 vc4 = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.c4);
  const __m256 vc3 = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.c3);
  const __m256 vc2 = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.c2);
  const __m256 vtwo = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.two);
  const __m256 vminus_one = _mm256_load_ps(params->avx_expm1minus_rr1_p6h5.minus_one);

  for (; batch >= 8 * sizeof(float); batch -= 8 * sizeof(float)) {
    const __m256 vx = _mm256_loadu_ps(input);
    input += 8;

    const __m256 vz = _mm256_or_ps(vx, vsign_mask);

    const __m256 vinvsignx = _mm256_xor_ps(vx, vz);
    const __m256 vm = _mm256_cmp_ps(vz, vsat_cutoff, _CMP_LE_OS);

    __m256 vn = _mm256_add_ps(_mm256_mul_ps(vz, vlog2e), vmagic_bias);

    const __m128 vn_hi = _mm256_extractf128_ps(vn, 1);
    __m256 vs = _mm256_castps128_ps256(_mm_castsi128_ps(_mm_slli_epi32(_mm_castps_si128(_mm256_castps256_ps128(vn)), 23)));
    const __m128 vs_hi = _mm_castsi128_ps(_mm_slli_epi32(_mm_castps_si128(vn_hi), 23));
    vs = _mm256_insertf128_ps(vs, vs_hi, 1);

    vn = _mm256_sub_ps(vn, vmagic_bias);

    const __m256 vt = _mm256_add_ps(_mm256_mul_ps(vn, vminus_ln2), vz);

    __m256 vp = _mm256_add_ps(_mm256_mul_ps(vc6, vt), vc5);
    vp = _mm256_add_ps(_mm256_mul_ps(vp, vt), vc4);
    vp = _mm256_add_ps(_mm256_mul_ps(vp, vt), vc3);
    vp = _mm256_add_ps(_mm256_mul_ps(vp, vt), vc2);
    vp = _mm256_add_ps(_mm256_mul_ps(vp, vt), vtwo);

    const __m256 vts = _mm256_mul_ps(vt, vs);
    const __m256 vsmo = _mm256_add_ps(vs, vminus_one);
    const __m256 vemo = _mm256_add_ps(_mm256_mul_ps(vp, vts), vsmo);

    const __m256 vepo = _mm256_add_ps(vemo, vtwo);
    __m256 vrepo = _mm256_rcp_ps(vepo);
    vrepo = _mm256_mul_ps(vrepo, _mm256_sub_ps(vtwo, _mm256_mul_ps(vrepo, vepo)));
    vrepo = _mm256_mul_ps(vrepo, _mm256_sub_ps(vtwo, _mm256_mul_ps(vrepo, vepo)));

    __m256 vy = _mm256_mul_ps(vemo, vrepo);


    vy = _mm256_blendv_ps(vy, vminus_one, vm);
    vy = _mm256_xor_ps(vy, vinvsignx);

    _mm256_storeu_ps(output, vy);
    output += 8;
  }
  if XNN_UNLIKELY(batch != 0) {
    assert(batch >= 1 * sizeof(float));
    assert(batch <= 7 * sizeof(float));
    const __m256i vmask = _mm256_loadu_si256((const __m256i*) ((uintptr_t) &params->avx_expm1minus_rr1_p6h5.mask_table[7] - batch));

    const __m256 vx = _mm256_maskload_ps(input, vmask);

    const __m256 vz = _mm256_or_ps(vx, vsign_mask);

    const __m256 vinvsignx = _mm256_xor_ps(vx, vz);
    const __m256 vm = _mm256_cmp_ps(vz, vsat_cutoff, _CMP_LE_OS);

    __m256 vn = _mm256_add_ps(_mm256_mul_ps(vz, vlog2e), vmagic_bias);

    const __m128 vn_hi = _mm256_extractf128_ps(vn, 1);
    __m256 vs = _mm256_castps128_ps256(_mm_castsi128_ps(_mm_slli_epi32(_mm_castps_si128(_mm256_castps256_ps128(vn)), 23)));
    const __m128 vs_hi = _mm_castsi128_ps(_mm_slli_epi32(_mm_castps_si128(vn_hi), 23));
    vs = _mm256_insertf128_ps(vs, vs_hi, 1);

    vn = _mm256_sub_ps(vn, vmagic_bias);

    const __m256 vt = _mm256_add_ps(_mm256_mul_ps(vn, vminus_ln2), vz);

    __m256 vp = _mm256_add_ps(_mm256_mul_ps(vc6, vt), vc5);
    vp = _mm256_add_ps(_mm256_mul_ps(vp, vt), vc4);
    vp = _mm256_add_ps(_mm256_mul_ps(vp, vt), vc3);
    vp = _mm256_add_ps(_mm256_mul_ps(vp, vt), vc2);
    vp = _mm256_add_ps(_mm256_mul_ps(vp, vt), vtwo);

    const __m256 vts = _mm256_mul_ps(vt, vs);
    const __m256 vsmo = _mm256_add_ps(vs, vminus_one);
    const __m256 vemo = _mm256_add_ps(_mm256_mul_ps(vp, vts), vsmo);

    const __m256 vepo = _mm256_add_ps(vemo, vtwo);
    __m256 vrepo = _mm256_rcp_ps(vepo);
    vrepo = _mm256_mul_ps(vrepo, _mm256_sub_ps(vtwo, _mm256_mul_ps(vrepo, vepo)));
    vrepo = _mm256_mul_ps(vrepo, _mm256_sub_ps(vtwo, _mm256_mul_ps(vrepo, vepo)));

    __m256 vy = _mm256_mul_ps(vemo, vrepo);


    vy = _mm256_blendv_ps(vy, vminus_one, vm);
    vy = _mm256_xor_ps(vy, vinvsignx);

    __m128 vy_lo = _mm256_castps256_ps128(vy);
    if (batch & (4 * sizeof(float))) {
      _mm_storeu_ps(output, vy_lo);
      vy_lo = _mm256_extractf128_ps(vy, 1);
      output += 4;
    }
    if (batch & (2 * sizeof(float))) {
      _mm_storel_pi((__m64*) output, vy_lo);
      vy_lo = _mm_movehl_ps(vy_lo, vy_lo);
      output += 2;
    }
    if (batch & (1 * sizeof(float))) {
      _mm_store_ss(output, vy_lo);
    }
  }
}
