significand
Section: C Library Functions (3)
Updated: 2023-02-05
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NAME
significand, significandf, significandl -
get mantissa of floating-point number
LIBRARY
Math library
(libm, -lm)
SYNOPSIS
#include <math.h>
double significand(double x);
float significandf(float x);
long double significandl(long double x);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
significand(),
significandf(),
significandl():
/* Since glibc 2.19: */ _DEFAULT_SOURCE
|| /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
DESCRIPTION
These functions return the mantissa of
x
scaled to the range [1,2).
They are equivalent to
scalb(x, (double) -ilogb(x))
This function exists mainly for use in certain standardized tests
for IEEE 754 conformance.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
significand(),
significandf(),
significandl()
| Thread safety | MT-Safe
|
STANDARDS
These functions are nonstandard; the
double
version is available on a number of other systems.
SEE ALSO
ilogb(3),
scalb(3)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- ATTRIBUTES
-
- STANDARDS
-
- SEE ALSO
-
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