Esempi in C++ (Cpp) per __set_status_flags

Esempio n. 1

File: bid64_logbd.c Progetto: AlexOreshkevich/mongo

BID_UINT64
bid64_logb (BID_UINT64 x _EXC_FLAGS_PARAM _EXC_MASKS_PARAM _EXC_INFO_PARAM) {
#endif
  int ires, exponent_x;
  BID_UINT64 sign_x, coefficient_x;
  BID_UINT64 valid_x, res;

  valid_x = unpack_BID64 (&sign_x, &exponent_x, &coefficient_x, x);

  if (!valid_x) {
    // test if x is NaN/Inf
if ((x & 0x7800000000000000ull) == 0x7800000000000000ull) {
#ifdef BID_SET_STATUS_FLAGS
  if ((x & 0x7e00000000000000ull) == 0x7e00000000000000ull)	// sNaN
    __set_status_flags (pfpsf, BID_INVALID_EXCEPTION);
#endif
	res = (coefficient_x) & QUIET_MASK64;
if ((x & 0x7c00000000000000ull) == 0x7800000000000000ull) 
    res &= 0x7fffffffffffffffull;
	BID_RETURN (res);
}
  // x is 0
#ifdef BID_SET_STATUS_FLAGS
    __set_status_flags (pfpsf, BID_ZERO_DIVIDE_EXCEPTION);
#endif
	res = 0xf800000000000000ull;
	BID_RETURN (res);
}

  BIDECIMAL_CALL1_NORND (bid64_ilogb, ires, x);
  if (ires & 0x80000000)
    res = 0xb1c0000000000000ull | (BID_UINT64)(-ires); 
  else
    res = 0x31c0000000000000ull | (BID_UINT64)ires; 
  BID_RETURN (res);
}

Esempio n. 2

File: bid64_scalb.c Progetto: MaxKellermann/gcc

UINT64
bid64_scalb (UINT64 x,
	     int n _RND_MODE_PARAM _EXC_FLAGS_PARAM _EXC_MASKS_PARAM
	     _EXC_INFO_PARAM) {
#endif
  UINT64 sign_x, coefficient_x, res;
  SINT64 exp64;
  int exponent_x, rmode;

#if DECIMAL_CALL_BY_REFERENCE
#if !DECIMAL_GLOBAL_ROUNDING
  _IDEC_round rnd_mode = *prnd_mode;
#endif
  x = *px;
  n = *pn;
#endif

  // unpack arguments, check for NaN or Infinity
  if (!unpack_BID64 (&sign_x, &exponent_x, &coefficient_x, x)) {
    // x is Inf. or NaN or 0
#ifdef SET_STATUS_FLAGS
    if ((x & SNAN_MASK64) == SNAN_MASK64)	// y is sNaN
      __set_status_flags (pfpsf, INVALID_EXCEPTION);
#endif
    if (coefficient_x)
      res = coefficient_x & QUIET_MASK64;
	else {
       exp64 = (SINT64) exponent_x + (SINT64) n;
	   if(exp64<0) exp64=0;
	   if(exp64>MAX_DECIMAL_EXPONENT) exp64=MAX_DECIMAL_EXPONENT;
       exponent_x = exp64;
      res = very_fast_get_BID64 (sign_x, exponent_x, coefficient_x);	// 0
	}
    BID_RETURN (res);
  }

  exp64 = (SINT64) exponent_x + (SINT64) n;
  exponent_x = exp64;

  if ((UINT32) exponent_x <= MAX_DECIMAL_EXPONENT) {
    res = very_fast_get_BID64 (sign_x, exponent_x, coefficient_x);
    BID_RETURN (res);
  }
  // check for overflow
  if (exp64 > MAX_DECIMAL_EXPONENT) {
    // try to normalize coefficient
    while ((coefficient_x < 1000000000000000ull)
	   && (exp64 > MAX_DECIMAL_EXPONENT)) {
      // coefficient_x < 10^15, scale by 10
      coefficient_x = (coefficient_x << 1) + (coefficient_x << 3);
      exponent_x--;
      exp64--;
    }
    if (exp64 <= MAX_DECIMAL_EXPONENT) {
      res = very_fast_get_BID64 (sign_x, exponent_x, coefficient_x);
      BID_RETURN (res);
    } else
      exponent_x = 0x7fffffff;	// overflow
  }
  // exponent < 0
  // the BID pack routine will round the coefficient
  rmode = rnd_mode;
  res = get_BID64 (sign_x, exponent_x, coefficient_x, rmode, pfpsf);
  BID_RETURN (res);

}