---

1 Typedef and constants ¶

The following data type has been defined via typedef.

__complex128: __float128-based complex number

The following macros are defined, which give the numeric limits of the __float128 data type.

FLT128_MAX: largest finite number

FLT128_MIN: smallest positive number with full precision

FLT128_EPSILON: difference between 1 and the next larger

representable number

FLT128_DENORM_MIN: smallest positive denormalized number

FLT128_MANT_DIG: number of digits in the mantissa (bit precision)

FLT128_MIN_EXP: maximal negative exponent

FLT128_MAX_EXP: maximal positive exponent

FLT128_DIG: number of decimal digits in the mantissa

FLT128_MIN_10_EXP: maximal negative decimal exponent

FLT128_MAX_10_EXP: maximal positive decimal exponent

The following mathematical constants of type __float128 are defined.

M_Eq: the constant e (Euler’s number)

M_LOG2Eq: binary logarithm of 2

M_LOG10Eq: common, decimal logarithm of 2

M_LN2q: natural logarithm of 2

M_LN10q: natural logarithm of 10

M_PIq: pi

M_PI_2q: pi divided by two

M_PI_4q: pi divided by four

M_1_PIq: one over pi

M_2_PIq: one over two pi

M_2_SQRTPIq: two over square root of pi

M_SQRT2q: square root of 2

M_SQRT1_2q: one over square root of 2