| .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de) |
| .\" |
| .\" %%%LICENSE_START(GPL_NOVERSION_ONELINE) |
| .\" Distributed under GPL |
| .\" %%%LICENSE_END |
| .\" |
| .\" heavily based on glibc infopages, copyright Free Software Foundation |
| .\" |
| .TH SIGNIFICAND 3 2021-03-22 "GNU" "Linux Programmer's Manual" |
| .SH NAME |
| significand, significandf, significandl \- |
| get mantissa of floating-point number |
| .SH SYNOPSIS |
| .nf |
| .B #include <math.h> |
| .PP |
| .BI "double significand(double " x ); |
| .BI "float significandf(float " x ); |
| .BI "long double significandl(long double " x ); |
| .fi |
| .PP |
| Link with \fI\-lm\fP. |
| .PP |
| .RS -4 |
| Feature Test Macro Requirements for glibc (see |
| .BR feature_test_macros (7)): |
| .RE |
| .PP |
| .BR significand (), |
| .BR significandf (), |
| .BR significandl (): |
| .nf |
| /* Since glibc 2.19: */ _DEFAULT_SOURCE |
| || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE |
| .fi |
| .SH DESCRIPTION |
| These functions return the mantissa of |
| .I x |
| scaled to the range [1,2). |
| They are equivalent to |
| .PP |
| .in +4n |
| .EX |
| scalb(x, (double) \-ilogb(x)) |
| .EE |
| .in |
| .PP |
| This function exists mainly for use in certain standardized tests |
| for IEEE 754 conformance. |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .ad l |
| .nh |
| .TS |
| allbox; |
| lbx lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR significand (), |
| .BR significandf (), |
| .BR significandl () |
| T} Thread safety MT-Safe |
| .TE |
| .hy |
| .ad |
| .sp 1 |
| .SH CONFORMING TO |
| These functions are nonstandard; the |
| .I double |
| version is available on a number of other systems. |
| .\" .SH HISTORY |
| .\" This function came from BSD. |
| .SH SEE ALSO |
| .BR ilogb (3), |
| .BR scalb (3) |
