개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(1M)을 검색하려면 섹션에서 1M 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

ieee_sun(3m)

Mathematical Library Functions                                    ieee_sun(3M)



NAME
       ieee_sun, fp_class, fp_classf, fp_classl, isinf, isinff, isinfl, isnor‐
       mal, isnormalf,  isnormall,  issubnormal,  issubnormalf,  issubnormall,
       iszero,   iszerof,   iszerol,  signbit,  signbitf,  signbitl,  nonstan‐
       dard_arithmetic, standard_arithmetic,  ieee_retrospective  -  miscella‐
       neous floating-point functions

SYNOPSIS
       cc [ flag ... ] file ...  -lsunmath -lm [ library ... ]
       #include <sunmath.h>

       enum fp_class_type fp_class(double x);


       enum fp_class_type fp_classf(float x);


       enum fp_class_type fp_classl(long double x);


       int isinf(double x);


       int isinff(float x);


       int isinfl(long double x);


       int isnormal(double x);


       int isnormalf(float x);


       int isnormall(long double x);


       int issubnormal(double x);


       int issubnormalf(float x);


       int issubnormall(long double x);


       int iszero(double x);


       int iszerof(float x);


       int iszerol(long double x);


       int signbit(double x);


       int signbitf(float x);


       int signbitl(long double x);


       void nonstandard_arithmetic(void);


       void standard_arithmetic(void);


       #include <stdio.h>


       void ieee_retrospective(FILE *f);

DESCRIPTION
       Some  of these functions provide capabilities suggested in the Appendix
       of ANSI/IEEE Std 754-1985.


       fp_class(x) returns a value that identifies x as zero, subnormal,  nor‐
       mal, infinite, or a quiet or signaling NaN. The type enum fp_class_type
       is defined in <floatingpoint.h>.


       The following functions return 1 if the indicated condition is true,  0
       otherwise:

       isinf(x)            x is infinite


       isnormal(x)         x is normal


       issubnormal(x)      x is subnormal


       iszero(x)           x is zero


       signbit(x)          x's sign bit is set



       nonstandard_arithmetic()  and  standard_arithmetic()  are meaningful on
       systems that provide  an  alternative  faster  mode  of  floating-point
       arithmetic that does not conform to the default IEEE Standard. Nonstan‐
       dard modes  vary  among  implementations;  nonstandard  mode  may,  for
       instance,  result  in  setting subnormal results to zero or in treating
       subnormal operands as zero, or both, or something else. standard_arith‐
       metic()  reverts  to the default standard mode. On systems that provide
       only one mode, these functions have no effect.


       ieee_retrospective(f) prints a message to the file described by FILE *f
       listing  all non-default floating-point modes and status in effect when
       called, including accrued exception flags, rounding direction and  pre‐
       cision  modes,  trap-enable  modes,  and  nonstandard  arithmetic mode.
       ieee_retrospective() is intended to be used at the end of a program  to
       indicate exceptional floating-point conditions that might have affected
       the result.


       A program can explicitly call ieee_retrospective() at any time. Fortran
       programs  compiled  with  f95  in -f77 compatibility mode automatically
       call ieee_retrospective() before they exit. C/C++ programs and  Fortran
       programs  compiled  with  f95  in the default mode do not automatically
       call ieee_retrospective(). The f95 compiler enables trapping on  common
       exceptions  by  default, so unless a program either explicitly disables
       trapping or installs a SIGFPE handler, it will immediately  abort  when
       such an exception occurs. In -f77 compatibility mode, the compiler does
       not enable trapping, so when floating point exceptions occur, the  pro‐
       gram  continues  execution  and alerts the user to those exceptions via
       the ieee_retrospective() output.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:


       tab() box; lw(2.75i) |lw(2.75i) lw(2.75i) |lw(2.75i)


       ATTRIBUTE TYPEATTRIBUTE VALUE _ Interface StabilityCommitted _  MT-Lev‐
       elMT-Safe


SEE ALSO
       copysign(3M), fpclassify(3M), fex_set_log(3M), ilogb(3M), isfinite(3M),
       isinf(3M),  isnan(3M),  isnormal(3M),   nextafter(3M),   remainder(3M),
       scalbn(3M), signbit(3M), attributes(5), floatingpoint.h(3HEAD)

NOTES
       As  required  by  C99,  the  <math.h>  header file defines macros named
       isinf(), isnormal(), and signbit(). These macros  are  compatible  with
       the  isinf(),  isnormal(), and signbit() functions except that they may
       return any non-zero value, not necessarily 1,  when  the  corresponding
       condition  is  met. In a source file that includes <math.h>, references
       to isinf(), isnormal(), and signbit() result in  substituton  of  these
       macros  by  default. In order to invoke the actual isinf(), isnormal(),
       and signbit() functions, a source file must either not include <math.h>
       or  else  explicitly  undefine  the  corresponding  macros.  Unlike the
       isinf(), isnormal(), and signbit() functions, which only  accept  argu‐
       ments of type double, however, the macros are type-generic; i.e., their
       arguments may be any expression of type float, double, or long  double.
       Therefore,  undefining  the macros may change the behavior of a program
       that uses them with arguments of type other than double. Such a program
       must  also  be changed to use the functions of the corresponding types,
       e.g., isinff(), isinfl(), etc. See isinf(3M), isnormal(3M),  and  sign‐
       bit(3M) for more information.



Studio 12.6                       14 Mar 2009                     ieee_sun(3M)