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| <a name="Typedef-and-constants"></a> |
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| <a name="Typedef-and-constants-1"></a> |
| <h2 class="chapter">1 Typedef and constants</h2> |
| |
| <p>The following data type has been defined via <code>typedef</code>. |
| </p> |
| <dl compact="compact"> |
| <dt><code>__complex128</code>: <code>__float128</code>-based complex number</dt> |
| </dl> |
| |
| <p>The following macros are defined, which give the numeric limits of the |
| <code>__float128</code> data type. |
| </p> |
| <dl compact="compact"> |
| <dt><code>FLT128_MAX</code>: largest finite number</dt> |
| <dt><code>FLT128_MIN</code>: smallest positive number with full precision</dt> |
| <dt><code>FLT128_EPSILON</code>: difference between 1 and the next larger</dt> |
| <dd><p>representable number |
| </p></dd> |
| <dt><code>FLT128_DENORM_MIN</code>: smallest positive denormalized number</dt> |
| <dt><code>FLT128_MANT_DIG</code>: number of digits in the mantissa (bit precision)</dt> |
| <dt><code>FLT128_MIN_EXP</code>: maximal negative exponent</dt> |
| <dt><code>FLT128_MAX_EXP</code>: maximal positive exponent</dt> |
| <dt><code>FLT128_DIG</code>: number of decimal digits in the mantissa</dt> |
| <dt><code>FLT128_MIN_10_EXP</code>: maximal negative decimal exponent</dt> |
| <dt><code>FLT128_MAX_10_EXP</code>: maximal positive decimal exponent</dt> |
| </dl> |
| |
| <p>The following mathematical constants of type <code>__float128</code> are defined. |
| </p> |
| <dl compact="compact"> |
| <dt><code>M_Eq</code>: the constant e (Euler’s number)</dt> |
| <dt><code>M_LOG2Eq</code>: binary logarithm of 2</dt> |
| <dt><code>M_LOG10Eq</code>: common, decimal logarithm of 2</dt> |
| <dt><code>M_LN2q</code>: natural logarithm of 2</dt> |
| <dt><code>M_LN10q</code>: natural logarithm of 10</dt> |
| <dt><code>M_PIq</code>: pi</dt> |
| <dt><code>M_PI_2q</code>: pi divided by two</dt> |
| <dt><code>M_PI_4q</code>: pi divided by four</dt> |
| <dt><code>M_1_PIq</code>: one over pi</dt> |
| <dt><code>M_2_PIq</code>: one over two pi</dt> |
| <dt><code>M_2_SQRTPIq</code>: two over square root of pi</dt> |
| <dt><code>M_SQRT2q</code>: square root of 2</dt> |
| <dt><code>M_SQRT1_2q</code>: one over square root of 2</dt> |
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