floatingpoint.h, floatingpoint - IEEE floating point
definitions
#include <floatingpoint.h>
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
<sys/ieeefp.h> defines certain types of interest to the
kernel.
fp_direction_type
The type of the IEEE rounding direction mode. Note: the
order of enumeration varies according to hardware.
fp_precision_type
The type of the IEEE rounding precision mode, which only
applies on systems that support extended precision such as machines based on
the Intel 80387 FPU or the 80486. SIGFPE handling:
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 abort with a core dump.
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 exceptions 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.
single;extended;quadruple
Definitions of IEEE formats.
fp_class_type
An enumeration of the various classes of IEEE values and
symbols.
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.
decimal_record
The canonical form for representing an unpacked decimal
floating-point number.
decimal_form
The type used to specify fixed or floating binary to
decimal conversion.
decimal_mode
A struct that contains specifications for conversion
between binary and decimal.
decimal_string_form
An enumeration of possible valid character strings
representing floating-point numbers, infinities, or NaNs.
/usr/include/sys/ieeefp.h