UNIX ON-LINE Man Pages - Die Onlinehilfe

Die Syntax von Unixbefehlen wird in den entsprechenden Manpages dokumentiert. Hier können Sie diese Onlinehilfe für viele Standardbefehle abrufen.

Suchoptionen:
Seiten auflisten, welche beginnen mit:
A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z   ALPHA   NUM   ANDERE   ALLE
FMA(3)                     Linux Programmer's Manual                    FMA(3)

NAME
       fma, fmaf, fmal - floating-point multiply and add

SYNOPSIS
       #include <math.h>

       double fma(double x, double y, double z);
       float fmaf(float x, float y, float z);
       long double fmal(long double x, long double y, long double z);

       Link with -lm.

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       fma(), fmaf(), fmal(): _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or
       cc -std=c99

DESCRIPTION
       The fma() function computes x * y + z.  The result is  rounded  as  one
       ternary operation according to the current rounding mode (see fenv(3)).

RETURN VALUE
       These functions return the value of x * y + z, rounded as  one  ternary
       operation.

       If x or y is a NaN, a NaN is returned.

       If  x times y is an exact infinity, and z is an infinity with the oppo-
       site sign, a domain error occurs, and a NaN is returned.

       If one of x or y is an infinity, the other is 0, and z is not a NaN,  a
       domain error occurs, and a NaN is returned.

       If  one of x or y is an infinity, and the other is 0, and z is a NaN, a
       domain error occurs, and a NaN is returned.

       If x times y is not an infinity times zero (or vice versa), and z is  a
       NaN, a NaN is returned.

       If the result overflows, a range error occurs, and an infinity with the
       correct sign is returned.

       If the result underflows, a range error  occurs,  and  a  signed  0  is
       returned.

ERRORS
       See  math_error(7) for information on how to determine whether an error
       has occurred when calling these functions.

       The following errors can occur:

       Domain error: x * y + z, or x * y is invalid and z is not a NaN
              An invalid floating-point exception (FE_INVALID) is raised.

       Range error: result overflow
              An overflow floating-point exception (FE_OVERFLOW) is raised.

       Range error: result underflow
              An underflow floating-point exception (FE_UNDERFLOW) is  raised.

       These functions do not set errno.

VERSIONS
       These functions first appeared in glibc in version 2.1.

CONFORMING TO
       C99, POSIX.1-2001.

SEE ALSO
       remainder(3), remquo(3)

COLOPHON
       This  page  is  part of release 3.25 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

                                  2008-10-06                            FMA(3)
 

Scannen Sie den Barcode um die Webseite zu öffnen


Quelle: http://www.trinler.net/de/service/doc/linux/man.html?command=fmaf
Gedruckt am: 11.12.2017 01:19 GMT+0100 (2017-12-11T01:19:08+01:00)