platform.h

/* Copyright (c) 2014-2018, NVIDIA CORPORATION. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  * Neither the name of NVIDIA CORPORATION nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "NvFoundation.h"

#ifndef NVP_PLATFORM_H__
#define NVP_PLATFORM_H__


#if defined(__GNUC__) && (__GNUC__ > 3 || (__GNUC__ >= 3 && __GNUC_MINOR__ >= 4))

  #define NV_NOOP(...)
  #define NV_BARRIER()       __sync_synchronize()

/*
// maybe better than __sync_synchronize?
#if defined(__i386__ ) || defined(__x64__)
#define NVP_BARRIER()  __asm__ __volatile__ ("mfence" ::: "memory")
#endif

#if defined(__arm__)
#define NVP_BARRIER() __asm__ __volatile__ ("dmb" :::"memory")
#endif
*/
  
#elif defined(__MSC__) || defined(_MSC_VER)

  #include <emmintrin.h>

  #pragma warning(disable:4142) // redefinition of same type
  #if (_MSC_VER >= 1400)      // VC8+
    #pragma warning(disable : 4996)    // Either disable all deprecation warnings,
  #endif   // VC8+

  #define NV_NOOP            __noop
  #define NV_BARRIER()       _mm_mfence()

#else
  #error "compiler unkown"
#endif

#endif