scalb(3M)scalb(3M)NAMEscalb(), scalbf(), scalbl(), scalbw(), scalbq() - scale exponent of a
radix-independent floating-point number
SYNOPSIS
HP Integrity Server Only
DESCRIPTION
The function returns where r is the radix of the machine's floating-
point arithmetic. The radix r is 2 on all PA-RISC and Integrity
servers.
Integrity Server Only
is a version of it takes arguments and returns a result.
is a version of it takes arguments and returns a result.
is an version of it takes arguments and returns an result.
is equivalent to on HP-UX systems.
USAGE
To use these functions, compile either with the default option or with
the and options.
To use (for Integrity servers) or compile also with the option.
Make sure your program includes Link in the math library by specifying
on the compiler or linker command line.
RETURN VALUE
and are equivalent.
If y returns x.
If x is +0 and y is +INFINITY, returns a NaN and raises the invalid
exception.
If x is +0 and y is an integer less than +INFINITY, returns +0.
If x is +INFINITY and y is an integer greater than −INFINITY, returns
+INFINITY.
If x is finite and positive-signed and y is −INFINITY, returns +0.
If x is positive and y is +INFINITY, returns +INFINITY.
If x is +INFINITY and y is −INFINITY, returns a NaN.
If x or y is NaN, returns a NaN.
returns a properly signed infinity in lieu of a value whose magnitude
is too large, and raises the overflow and inexact exceptions.
raises the underflow and inexact exceptions whenever a result is tiny
(essentially denormal or zero) and thereby suffers loss of accuracy,
and may raise those exceptions if the result is merely tiny.
ERRORS
If the correct value would overflow or underflow, sets to [ERANGE].
Integrity Server Only
HP-UX functions on Integrity servers do not set by default. For set‐
ting, compile with the option.
SEE ALSOscalbn(3M), scalbln(3M), ilogb(3M), ldexp(3M), logb(3M), math(5).
STANDARDS CONFORMANCE
: ISO/IEC C99 (including Annex F, ``IEC 60559 floating-point arith‐
metic'')
scalb(3M)
