4G/code/BCU/BCUModel/rtGetNaN.c

#include "rtwtypes.h"
#include "rtGetNaN.h"
#include <stddef.h>
#include "rt_nonfinite.h"
#define NumBitsPerChar                 8U

real_T rtGetNaN(void)
{
  size_t bitsPerReal = sizeof(real_T) * (NumBitsPerChar);
  real_T nan = 0.0;
  if (bitsPerReal == 32U) {
    nan = rtGetNaNF();
  } else {
    union {
      LittleEndianIEEEDouble bitVal;
      real_T fltVal;
    } tmpVal;

    tmpVal.bitVal.words.wordH = 0xFFF80000U;
    tmpVal.bitVal.words.wordL = 0x00000000U;
    nan = tmpVal.fltVal;
  }

  return nan;
}

real32_T rtGetNaNF(void)
{
  IEEESingle nanF = { { 0.0F } };

  nanF.wordL.wordLuint = 0xFFC00000U;
  return nanF.wordL.wordLreal;
}