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+'\" et
+.TH FREXP "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.\"
+.SH NAME
+frexp,
+frexpf,
+frexpl
+\(em extract mantissa and exponent from a double precision number
+.SH SYNOPSIS
+.LP
+.nf
+#include <math.h>
+.P
+double frexp(double \fInum\fP, int *\fIexp\fP);
+float frexpf(float \fInum\fP, int *\fIexp\fP);
+long double frexpl(long double \fInum\fP, int *\fIexp\fP);
+.fi
+.SH DESCRIPTION
+The functionality described on this reference page is aligned with the
+ISO\ C standard. Any conflict between the requirements described here and the
+ISO\ C standard is unintentional. This volume of POSIX.1\(hy2017 defers to the ISO\ C standard.
+.P
+These functions shall break a floating-point number
+.IR num
+into a normalized fraction and an integral power of 2. The integer
+exponent shall be stored in the
+.BR int
+object pointed to by
+.IR exp .
+.SH "RETURN VALUE"
+For finite arguments, these functions shall return the value
+.IR x ,
+such that
+.IR x
+has a magnitude in the interval [\(12,1) or 0, and
+.IR num
+equals
+.IR x
+times 2 raised to the power *\fIexp\fP.
+.P
+If
+.IR num
+is NaN, a NaN shall be returned, and the value of *\fIexp\fP is
+unspecified.
+.P
+If
+.IR num
+is \(+-0, \(+-0 shall be returned, and the value of *\fIexp\fP shall be
+0.
+.P
+If
+.IR num
+is \(+-Inf,
+.IR num
+shall be returned, and the value of *\fIexp\fP is unspecified.
+.SH ERRORS
+No errors are defined.
+.P
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fIisnan\fR\^(\|)",
+.IR "\fIldexp\fR\^(\|)",
+.IR "\fImodf\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2017,
+.IR "\fB<math.h>\fP"
+.\"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1-2017, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, 2018 Edition,
+Copyright (C) 2018 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group.
+In the event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .
+.PP
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .