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alexbevi
GitHub Repository: alexbevi/BizHawk
 Path: blob/master/libsnes/bsnes/nall/intrinsics.hpp
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#ifndef NALL_INTRINSICS_HPP

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#define NALL_INTRINSICS_HPP

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struct Intrinsics {

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  enum class Compiler : unsigned { GCC, VisualC, Unknown };

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  enum class Platform : unsigned { X, OSX, Windows, Unknown };

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  enum class Endian : unsigned { LSB, MSB, Unknown };

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  static inline Compiler compiler();

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  static inline Platform platform();

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  static inline Endian endian();

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};

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/* Compiler detection */

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#if defined(__GNUC__)

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  #define COMPILER_GCC

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  Intrinsics::Compiler Intrinsics::compiler() { return Intrinsics::Compiler::GCC; }

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#elif defined(_MSC_VER)

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  #define COMPILER_VISUALC

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  Intrinsics::Compiler Intrinsics::compiler() { return Intrinsics::Compiler::VisualC; }

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#else

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  #warning "unable to detect compiler"

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  #define COMPILER_UNKNOWN

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  Intrinsics::Compiler Intrinsics::compiler() { return Intrinsics::Compiler::Unknown; }

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#endif

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/* Platform detection */

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#if defined(linux) || defined(__sun__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__) || defined(__OpenBSD__)

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  #define PLATFORM_X

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  Intrinsics::Platform Intrinsics::platform() { return Intrinsics::Platform::X; }

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#elif defined(__APPLE__)

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  #define PLATFORM_OSX

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  Intrinsics::Platform Intrinsics::platform() { return Intrinsics::Platform::OSX; }

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#elif defined(_WIN32)

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  #define PLATFORM_WINDOWS

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  #define PLATFORM_WIN

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  Intrinsics::Platform Intrinsics::platform() { return Intrinsics::Platform::Windows; }

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#else

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  #warning "unable to detect platform"

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  #define PLATFORM_UNKNOWN

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  Intrinsics::Platform Intrinsics::platform() { return Intrinsics::Platform::Unknown; }

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#endif

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/* Endian detection */

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#if defined(__i386__) || defined(__amd64__) || defined(_M_IX86) || defined(_M_AMD64)

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  #define ENDIAN_LSB

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  #define ARCH_LSB

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  Intrinsics::Endian Intrinsics::endian() { return Intrinsics::Endian::LSB; }

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#elif defined(__powerpc__) || defined(_M_PPC) || defined(__BIG_ENDIAN__)

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  #define ENDIAN_MSB

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  #define ARCH_MSB

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  Intrinsics::Endian Intrinsics::endian() { return Intrinsics::Endian::MSB; }

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#else

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  #warning "unable to detect endian"

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  #define ENDIAN_UNKNOWN

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  #define ARCH_UNKNOWN

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  Intrinsics::Endian Intrinsics::endian() { return Intrinsics::Endian::Unknown; }

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#endif

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#endif

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