text: /****************************************************************************
  **
  ** Copyright (C) 2017 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the QtCore module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** GNU Lesser General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU Lesser
  ** General Public License version 3 as published by the Free Software
  ** Foundation and appearing in the file LICENSE.LGPL3 included in the
  ** packaging of this file. Please review the following information to
  ** ensure the GNU Lesser General Public License version 3 requirements
  ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU
  ** General Public License version 2.0 or (at your option) the GNU General
  ** Public license version 3 or any later version approved by the KDE Free
  ** Qt Foundation. The licenses are as published by the Free Software
  ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
  ** included in the packaging of this file. Please review the following
  ** information to ensure the GNU General Public License requirements will
  ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
  ** https://www.gnu.org/licenses/gpl-3.0.html.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #include "private/qsimd_p.h"
  
  // The x86 F16C instructions operate on AVX registers, so AVX support is
  // required. We don't need to check for __F16C__ because we this file wouldn't
  // have been compiled if the support was missing in the first place, and not
  // all compilers define it. Technically, we didn't need to check for __AVX__
  // either.
  #if !QT_COMPILER_SUPPORTS_HERE(AVX)
  #  error "AVX support required"
  #endif
  
  #ifdef __cplusplus
  QT_BEGIN_NAMESPACE
  extern "C" {
  #endif
  
  QT_FUNCTION_TARGET(F16C)
  void qFloatToFloat16_fast(quint16 *out, const float *in, qsizetype len) Q_DECL_NOEXCEPT
  {
      qsizetype i = 0;
      int epilog_i;
      for (; i < len - 7; i += 8)
          _mm_storeu_si128((__m128i *)(out + i), _mm256_cvtps_ph(_mm256_loadu_ps(in + i), 0));
      if (i < len - 3) {
          _mm_storel_epi64((__m128i *)(out + i), _mm_cvtps_ph(_mm_loadu_ps(in + i), 0));
          i += 4;
      }
      // Inlining "qfloat16::qfloat16(float f)":
      for (epilog_i = 0; i < len && epilog_i < 3; ++i, ++epilog_i)
          out[i] = _mm_extract_epi16(_mm_cvtps_ph(_mm_set_ss(in[i]), 0), 0);
  }
  
  QT_FUNCTION_TARGET(F16C)
  void qFloatFromFloat16_fast(float *out, const quint16 *in, qsizetype len) Q_DECL_NOEXCEPT
  {
      qsizetype i = 0;
      int epilog_i;
      for (; i < len - 7; i += 8)
          _mm256_storeu_ps(out + i, _mm256_cvtph_ps(_mm_loadu_si128((const __m128i *)(in + i))));
      if (i < len - 3) {
          _mm_storeu_ps(out + i, _mm_cvtph_ps(_mm_loadl_epi64((const __m128i *)(in + i))));
          i += 4;
      }
      // Inlining "qfloat16::operator float()":
      for (epilog_i = 0; i < len && epilog_i < 3; ++i, ++epilog_i)
          out[i] = _mm_cvtss_f32(_mm_cvtph_ps(_mm_cvtsi32_si128(in[i])));
  }
  
  #ifdef __cplusplus
  } // extern "C"
  QT_END_NAMESPACE
  #endif
  