infconst.c

ecos实时嵌入式操作系统

//===========================================================================
//
//      infconst.c
//
//      Infinity constant
//
//===========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
//===========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   jlarmour
// Contributors:  jlarmour
// Date:        1998-02-13
// Purpose:     
// Description: Defines a constant cyg_libm_infinity so that we can define
//              HUGE_VAL
// Usage:       
//
//####DESCRIPTIONEND####
//
//===========================================================================

// CONFIGURATION

#include <pkgconf/libm.h>   // Configuration header

// Include the Math library?
#ifdef CYGPKG_LIBM     

// INCLUDES

#include <cyg/infra/cyg_type.h>    // Common type definitions and support
                                   // including endian-ness
#include <math.h>                  // Main header for math library
#include <sys/ieeefp.h>            // Cyg_libm_ieee_double_shape_type


// GLOBALS

#if (CYG_BYTEORDER == CYG_MSBFIRST) // Big endian

const Cyg_libm_ieee_double_shape_type cyg_libm_infinity = { {0x7ff00000, 0} };

#else  // Little endian

const Cyg_libm_ieee_double_shape_type cyg_libm_infinity = { {0, 0x7ff00000} };

#endif

#endif // ifdef CYGPKG_LIBM

// EOF infconst.c