OgrePlatformInformation.h

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/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2012 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
*/
#ifndef __PlatformInformation_H__
#define __PlatformInformation_H__

#include "OgrePrerequisites.h"

namespace Ogre {
//
// TODO: Puts following macros into OgrePlatform.h?
//

/* Initial CPU stuff to set.
*/
#define OGRE_CPU_UNKNOWN    0
#define OGRE_CPU_X86        1
#define OGRE_CPU_PPC        2
#define OGRE_CPU_ARM        3

/* Find CPU type
*/
#if (defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))) || \
    (defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)))
#   define OGRE_CPU OGRE_CPU_X86

#elif OGRE_PLATFORM == OGRE_PLATFORM_APPLE && defined(__BIG_ENDIAN__)
#   define OGRE_CPU OGRE_CPU_PPC
#elif OGRE_PLATFORM == OGRE_PLATFORM_APPLE
#   define OGRE_CPU OGRE_CPU_X86
#elif OGRE_PLATFORM == OGRE_PLATFORM_APPLE_IOS && (defined(__i386__) || defined(__x86_64__))
#   define OGRE_CPU OGRE_CPU_X86
#elif defined(__arm__)
#   define OGRE_CPU OGRE_CPU_ARM
#else
#   define OGRE_CPU OGRE_CPU_UNKNOWN
#endif

/* Find how to declare aligned variable.
*/
#if OGRE_COMPILER == OGRE_COMPILER_MSVC
#   define OGRE_ALIGNED_DECL(type, var, alignment)  __declspec(align(alignment)) type var

#elif (OGRE_COMPILER == OGRE_COMPILER_GNUC) || (OGRE_COMPILER == OGRE_COMPILER_CLANG)
#   define OGRE_ALIGNED_DECL(type, var, alignment)  type var __attribute__((__aligned__(alignment)))

#else
#   define OGRE_ALIGNED_DECL(type, var, alignment)  type var
#endif

#if OGRE_CPU == OGRE_CPU_X86
#   define OGRE_SIMD_ALIGNMENT  16

#else
#   define OGRE_SIMD_ALIGNMENT  16
#endif

/* Declare variable aligned to SIMD alignment.
*/
#define OGRE_SIMD_ALIGNED_DECL(type, var)   OGRE_ALIGNED_DECL(type, var, OGRE_SIMD_ALIGNMENT)

/* Define whether or not Ogre compiled with SSE supports.
*/
#if   OGRE_DOUBLE_PRECISION == 0 && OGRE_CPU == OGRE_CPU_X86 && OGRE_COMPILER == OGRE_COMPILER_MSVC && \
    OGRE_PLATFORM != OGRE_PLATFORM_NACL
#   define __OGRE_HAVE_SSE  1
#elif OGRE_DOUBLE_PRECISION == 0 && OGRE_CPU == OGRE_CPU_X86 && (OGRE_COMPILER == OGRE_COMPILER_GNUC || OGRE_COMPILER == OGRE_COMPILER_CLANG) && \
      OGRE_PLATFORM != OGRE_PLATFORM_APPLE_IOS && OGRE_PLATFORM != OGRE_PLATFORM_NACL
#   define __OGRE_HAVE_SSE  1
#endif

/* Define whether or not Ogre compiled with VFP supports.
 */
#if OGRE_DOUBLE_PRECISION == 0 && OGRE_CPU == OGRE_CPU_ARM && (OGRE_COMPILER == OGRE_COMPILER_GNUC || OGRE_COMPILER == OGRE_COMPILER_CLANG) && defined(__ARM_ARCH_6K__) && defined(__VFP_FP__)
#   define __OGRE_HAVE_VFP  1
#endif

/* Define whether or not Ogre compiled with NEON supports.
 */
#if OGRE_DOUBLE_PRECISION == 0 && OGRE_CPU == OGRE_CPU_ARM && (OGRE_COMPILER == OGRE_COMPILER_GNUC || OGRE_COMPILER == OGRE_COMPILER_CLANG) && defined(__ARM_ARCH_7A__) && defined(__ARM_NEON__)
#   define __OGRE_HAVE_NEON  1
#endif

#ifndef __OGRE_HAVE_SSE
#   define __OGRE_HAVE_SSE  0
#endif

#ifndef __OGRE_HAVE_VFP
#   define __OGRE_HAVE_VFP  0
#endif

#ifndef __OGRE_HAVE_NEON
#   define __OGRE_HAVE_NEON  0
#endif
    
    class _OgreExport PlatformInformation
    {
    public:

        enum CpuFeatures
        {
#if OGRE_CPU == OGRE_CPU_X86
            CPU_FEATURE_SSE         = 1 << 0,
            CPU_FEATURE_SSE2        = 1 << 1,
            CPU_FEATURE_SSE3        = 1 << 2,
            CPU_FEATURE_MMX         = 1 << 3,
            CPU_FEATURE_MMXEXT      = 1 << 4,
            CPU_FEATURE_3DNOW       = 1 << 5,
            CPU_FEATURE_3DNOWEXT    = 1 << 6,
            CPU_FEATURE_CMOV        = 1 << 7,
            CPU_FEATURE_TSC         = 1 << 8,
            CPU_FEATURE_FPU         = 1 << 9,
            CPU_FEATURE_PRO         = 1 << 10,
            CPU_FEATURE_HTT         = 1 << 11,
#elif OGRE_CPU == OGRE_CPU_ARM
            CPU_FEATURE_VFP         = 1 << 12,
            CPU_FEATURE_NEON        = 1 << 13,
#endif

            CPU_FEATURE_NONE        = 0
        };

        static const String& getCpuIdentifier(void);

        static uint getCpuFeatures(void);

        static bool hasCpuFeature(CpuFeatures feature);


        static void log(Log* pLog);

    };
}

#endif  // __PlatformInformation_H__