Exemple #1
0
_RETURN_TYPE
INTERNAL_FUNCTION_NAME (DEC_TYPE x)
{
  DEC_TYPE result;
  decContext context;
  decNumber dn_result;
  decNumber dn_x;
  decNumber dn_absx;
  decNumber dn_logx;
  decNumber dn_one;
  decNumber dn_cmp;
  enum rounding round;

  FUNC_CONVERT_TO_DN (&x, &dn_x);
  if (decNumberIsZero (&dn_x))
    {
      DFP_EXCEPT (FE_INVALID);
      DFP_ERRNO (EDOM);
      return _FBLOG0;
    }
  if (decNumberIsInfinite (&dn_x))
    {
      DFP_EXCEPT (FE_INVALID);
      DFP_ERRNO (EDOM);
      return decNumberIsNegative (&dn_x) ? _MIN_VALUE : _MAX_VALUE;
    }
  if (decNumberIsNaN (&dn_x))
    {
      DFP_EXCEPT (FE_INVALID);
      DFP_ERRNO (EDOM);
      return _FBLOGNAN;
    }

  decContextDefault (&context, DEFAULT_CONTEXT);

  decNumberAbs (&dn_absx, &dn_x, &context);

  /* For DFP, we use radix 10 instead of whatever FLT_RADIX happens to be */
  decNumberLog10 (&dn_logx, &dn_absx, &context);

  /* Capture the case where truncation will return the wrong result,
     by rounding up if -1.0 < x < 1.0  */
  round = DEC_ROUND_DOWN;
  decNumberFromInt32 (&dn_one, 1);
  decNumberCompare (&dn_cmp, &dn_x, &dn_one, &context);
  if (-decNumberIsNegative(&dn_cmp))
    {
      decNumberFromInt32 (&dn_one, -1);
      decNumberCompare (&dn_cmp, &dn_x, &dn_one, &context);
      if (!decNumberIsNegative(&dn_cmp) && !decNumberIsZero(&dn_cmp))
	round = DEC_ROUND_UP;
    }
  context.round = round;

  decNumberToIntegralValue (&dn_result, &dn_logx, &context);

  FUNC_CONVERT_FROM_DN (&dn_result, &result, &context);
  /* Use _Decimal* to int casting.  */
  return (_RETURN_TYPE) result;
}
Exemple #2
0
DEC_TYPE
INTERNAL_FUNCTION_NAME (DEC_TYPE x)
{
  DEC_TYPE z = IEEE_FUNCTION_NAME (x);
  if (!FUNC_D(__isfinite) (z) && FUNC_D(__isfinite) (x))
    DFP_ERRNO (ERANGE);
  if (x < DFP_CONSTANT(0.0) && (FUNC_D (__isinf) (x) && FUNC_D (__rint) (x) == x) )
    DFP_ERRNO (EDOM);
  return z;
}
Exemple #3
0
DEC_TYPE
INTERNAL_FUNCTION_NAME (DEC_TYPE x)
{
  DEC_TYPE z = IEEE_FUNCTION_NAME (x);
  if (x == DFP_CONSTANT(0.0))
    DFP_ERRNO (ERANGE);
  if (x < DFP_CONSTANT(0.0))
    DFP_ERRNO (EDOM);
  return z;
}
Exemple #4
0
DEC_TYPE
INTERNAL_FUNCTION_NAME (DEC_TYPE x)
{
  DEC_TYPE z = IEEE_FUNCTION_NAME (x);
  if (x < DFP_CONSTANT(-1.0) || x > DFP_CONSTANT(1.0))
    DFP_ERRNO (EDOM);
  /* The normal glibc ieee754 k_standard.c file does not follow c99 or POSIX
   * with regard to atanh pole errors. atan(+-1.0) [the binary version] will
   * set errno to EDOM.  Hopefully this will get worked out soon. */
  if (x == DFP_CONSTANT(-1.0) || x == DFP_CONSTANT(1.0))
    DFP_ERRNO (ERANGE);
  return z;
}
Exemple #5
0
DEC_TYPE
INTERNAL_FUNCTION_NAME (DEC_TYPE x)
{
  DEC_TYPE z = IEEE_FUNCTION_NAME (x);
  if (!FUNC_D(__isfinite) (z) && FUNC_D(__isfinite) (x))
    DFP_ERRNO (ERANGE);
  return z;
}
Exemple #6
0
DEC_TYPE
INTERNAL_FUNCTION_NAME (DEC_TYPE x, DEC_TYPE y)
{
  DEC_TYPE z = IEEE_FUNCTION_NAME (x, y);
  /* Pole error: x = 0, y < 0 (non-inf). Set ERANGE in accordance with C99 */
  if (x == DFP_CONSTANT(0.0) && FUNC_D(__isfinite)(y) && y < DFP_CONSTANT(0.0))
      DFP_ERRNO (ERANGE);
  if (!FUNC_D(__isfinite) (z) && FUNC_D(__isfinite) (x) && FUNC_D(__isfinite) (y))
    {
      if (FUNC_D(__isnan) (z)) /*  Domain error was triggered, x < 0 and y was not an
			odd int */
	DFP_ERRNO (EDOM);
      else	/*  Overflow */
	DFP_ERRNO (ERANGE);
    }
  return z;
}
Exemple #7
0
DEC_TYPE
INTERNAL_FUNCTION_NAME (DEC_TYPE x)
{
  DEC_TYPE z = IEEE_FUNCTION_NAME (x);
  if (x > DFP_CONSTANT(1.0) || x < DFP_CONSTANT(-1.0))
    DFP_ERRNO (EDOM);
  return z;
}
Exemple #8
0
__ROUND_RETURN_TYPE
INTERNAL_FUNCTION_NAME (DEC_TYPE x)
{
  __ROUND_RETURN_TYPE z = IEEE_FUNCTION_NAME (x);
  if (FUNC_D(__isnan) (x) || FUNC_D(__isinf) (x)
	|| x > __MAX_VALUE || x < __MIN_VALUE)
    DFP_ERRNO (EDOM);
  return z;
}
Exemple #9
0
DEC_TYPE
INTERNAL_FUNCTION_NAME (DEC_TYPE x)
{
  decContext context;
  decNumber dn_result;
  DEC_TYPE result;
  decNumber dn_x;
  decNumber dn_tmp;
  decNumber dn_log10;
  decNumber dn_one;
  decNumber dn_cmp;
  enum rounding round;

  FUNC_CONVERT_TO_DN (&x, &dn_x);
  if (decNumberIsNaN (&dn_x))
    return x+x;
  if (decNumberIsInfinite (&dn_x))	/* +-Inf: Inf  */
    return DEC_INFINITY;
  if (decNumberIsZero (&dn_x))	/*  Pole Error if x==0 */
    {
      DFP_ERRNO (ERANGE);
      DFP_EXCEPT (FE_DIVBYZERO);
      return -DFP_HUGE_VAL;
    }
  if (decNumberIsInfinite (&dn_x) && decNumberIsNegative (&dn_x))
    return -x;

  decContextDefault (&context, DEFAULT_CONTEXT);
  decNumberAbs (&dn_tmp, &dn_x, &context);
  /*  For DFP, we use radix 10 instead of whatever FLT_RADIX
      happens to be */
  decNumberLog10 (&dn_log10, &dn_tmp, &context);

  /* Capture the case where truncation will return the wrong result,
     by rounding up if -1.0 < x < 1.0  */
  round = DEC_ROUND_DOWN;
  decNumberFromInt32 (&dn_one, 1);
  decNumberCompare (&dn_cmp, &dn_x, &dn_one, &context);
  if (-decNumberIsNegative(&dn_cmp))
    {
      decNumberFromInt32 (&dn_one, -1);
      decNumberCompare (&dn_cmp, &dn_x, &dn_one, &context);
      if (!decNumberIsNegative(&dn_cmp) && !decNumberIsZero(&dn_cmp))
	round = DEC_ROUND_UP;
    }
  context.round = round;

  decNumberToIntegralValue (&dn_result, &dn_log10, &context);

  FUNC_CONVERT_FROM_DN (&dn_result, &result, &context);

  return result;
}