SCALBLN(3M) | Mathematical Library Functions | SCALBLN(3M) |

scalbln, scalblnf, scalblnl, scalbn, scalbnf, scalbnl - compute exponent using FLT_RADIX

c99 [flag... ]file...-lm[library... ] #include <math.h>doublescalbln(doublex,longn);

floatscalblnf(floatx,longn);

long doublescalblnl(long doublex,longn);

doublescalbn(doublex,intn);

floatscalbnf(floatx,intn);

long doublescalbnl(long doublex,intn);

These functions compute *x* * **FLT_RADIX**^n efficiently,
not normally by computing **FLT_RADIX**^n explicitly.

Upon successful completion, these functions return *x* *
**FLT_RADIX**^*n*>.

If the result would cause overflow, a range error occurs and these
functions return ±**HUGE_VAL**, ±**HUGE_VALF**, and
±**HUGE_VALL** (according to the sign of *x*) as appropriate
for the return type of the function.

If *x* is NaN, a NaN is returned.

If *x* is ±0 or ±Inf, *x* is returned.

If *x* is 0, *x* is returned.

These functions will fail if:

**Range Error**

The result overflows.

If the integer expression (**math_errhandling** &
**MATH_ERREXCEPT**) is non-zero, then the overflow floating-point
exception is raised.

An application wanting to check for exceptions should call
**feclearexcept**(**FE_ALL_EXCEPT**) before calling these functions.
On return, if **fetestexcept**(**FE_INVALID** | **FE_DIVBYZERO** |
**FE_OVERFLOW** | **FE_UNDERFLOW**) is non-zero, an exception has been
raised. An application should either examine the return value or check the
floating point exception flags to detect exceptions.

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE | ATTRIBUTE VALUE |

Interface Stability | Standard |

MT-Level | MT-Safe |

math.h(3HEAD), feclearexcept(3M), fetestexcept(3M), scalb(3M), attributes(7), standards(7)

July 12, 2006 | SunOS 5.11 |