// F64         - function available on all 64 bit architectures
// F_X86_ANY   - function available on i386 and x86_64
// F_I386      - function available only on i386
// F_X64       - function available only on x86_64
// F_ARM32     - function available only on arm32
// F_ARM_ANY   - function available on 32 and 64 bit arm
// F_NON_I386  - function available on everything but i386
#if defined(DEF_X64)
#define F64(x) x
#define F_X64(x) x
#define F_X86_ANY(x) x
#define F_NON_I386(x) x
#elif defined(DEF_I386)
#define F_I386(x) x
#define F_X86_ANY(x) x
#elif defined(DEF_ARM32)
#define F_ARM32(x) x
#define F_ARM_ANY(x) x
#define F_NON_I386(x) x
#endif

#ifndef F64
#define F64(x)
#endif
#ifndef F_X86_ANY
#define F_X86_ANY(x)
#endif
#ifndef F_I386
#define F_I386(x)
#endif
#ifndef F_X64
#define F_X64(x)
#endif
#ifndef F_ARM_ANY
#define F_ARM_ANY(x)
#endif
#ifndef F_ARM32
#define F_ARM32(x)
#endif
#ifndef F_NON_I386
#define F_NON_I386(x)
#endif