Manual Pages for UNIX Operating System command usage for man floatingpoint

Headers                                    floatingpoint.h(3HEAD)



NAME
     floatingpoint.h, floatingpoint - IEEE floating point defini-
     tions

SYNOPSIS
     #include 


DESCRIPTION
     This file defines constants, types, and  functions  used  to
     implement standard floating point according to ANSI/IEEE Std
     754-1985.  The  functions  are  implemented  in  libc.   The
     included header file  defines certain types of
     interest to the kernel.

  IEEE Rounding Modes
     fp_direction_type      The type of the IEEE rounding  direc-
                            tion   mode.   Note:   the  order  of
                            enumeration   varies   according   to
                            hardware.


     fp_precision_type      The type of the IEEE rounding  preci-
                            sion mode, which only applies on sys-
                            tems that support extended  precision
                            such  as  machines based on the Intel
                            80387 FPU or the 80486.  SIGFPE  han-
                            dling:


     sigfpe_code_type       The type of a SIGFPE code.


     sigfpe_handler_type    The type of a  user-definable  SIGFPE
                            exception  handler called to handle a
                            particular SIGFPE code.


     SIGFPE_DEFAULT         A macro indicating the default SIGFPE
                            exception handling, namely to perform
                            the exception handling  specified  by
                            the  user,  if  any, and otherwise to
                            dump core using abort(3C).


     SIGFPE_IGNORE          A  macro  indicating   an   alternate
                            SIGFPE  exception handling, namely to
                            ignore and continue execution.


     SIGFPE_ABORT           A  macro  indicating   an   alternate
                            SIGFPE  exception handling, namely to



SunOS 5.11           Last change: 5 Mar 1993                    1






Headers                                    floatingpoint.h(3HEAD)



                            abort with a core dump.


  IEEE Exception Handling
     N_IEEE_EXCEPTION           The  number  of   distinct   IEEE
                                floating-point exceptions.


     fp_exception_type          The type of the  N_IEEE_EXCEPTION
                                exceptions.   Each  exception  is
                                given a bit number.


     fp_exception_field_type    The  type  intended  to  hold  at
                                least    N_IEEE_EXCEPTION    bits
                                corresponding to the IEEE  excep-
                                tions         numbered         by
                                fp_exception_type.           Thus
                                fp_inexact   corresponds  to  the
                                least   significant    bit    and
                                fp_invalid  to  the  fifth  least
                                significant   bit.   Note:   some
                                operations  may set more than one
                                exception.


  IEEE Formats and Classification
     single;extended;quadruple

         Definitions of IEEE formats.


     fp_class_type

         An enumeration of the various classes of IEEE values and
         symbols.


  IEEE Base Conversion
     The functions described  under  floating_to_decimal(3C)  and
     decimal_to_floating(3C)  satisfy not only the IEEE Standard,
     but also the stricter requirements of correct  rounding  for
     all arguments.

     DECIMAL_STRING_LENGTH     The length of a decimal_string.


     decimal_string            The    digit    buffer    in     a
                               decimal_record.






SunOS 5.11           Last change: 5 Mar 1993                    2






Headers                                    floatingpoint.h(3HEAD)



     decimal_record            The canonical form for  represent-
                               ing  an unpacked decimal floating-
                               point number.


     decimal_form              The type used to specify fixed  or
                               floating binary to decimal conver-
                               sion.


     decimal_mode              A struct that contains  specifica-
                               tions   for   conversion   between
                               binary and decimal.


     decimal_string_form       An enumeration of  possible  valid
                               character   strings   representing
                               floating-point  numbers,   infini-
                               ties, or NaNs.


FILES
     /usr/include/sys/ieeefp.h

SEE ALSO
     abort(3C),      decimal_to_floating(3C),       econvert(3C),
     floating_to_decimal(3C),  sigfpe(3C), string_to_decimal(3C),
     strtod(3C)



























SunOS 5.11           Last change: 5 Mar 1993                    3