In an appendix, the IEEE standard lists several useful floating-point
functions that an implementor may support but is not required to
support. Table 2-12 “HP-UX Support for IEEE
Recommended Functions” describes how
HP-UX systems support these functions. The supported functions and
macros are provided in the C library only. Appendix A “The C Math Library” describes these functions briefly; see the
online man pages for more information.
Table 2-12 HP-UX Support for IEEE
Recommended Functions
Function Name | HP
Implementation |
|---|
class | The
fpclassify and
signbit macros
provide identical functionality. See “Floating-Point Classification
Macros”. |
copysign | Supported.
Float version (copysignf)
also supported. |
finite | The
isfinite macro
provides identical functionality. |
logb | Supported. |
nextafter | Supported. |
isnan | Supported. |
scalb | Supported. |
unordered | Not supported. |
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