mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-16 01:50:11 +00:00
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#ifndef __GNUC__
|
|
#error This file uses GNU C extensions; you must compile with GCC.
|
|
#else
|
|
|
|
#include <ansidecl.h>
|
|
#include <errno.h>
|
|
#include <math.h>
|
|
|
|
/* Deal with an infinite or NaN result.
|
|
If ERROR is ERANGE, result is +Inf;
|
|
if ERROR is - ERANGE, result is -Inf;
|
|
otherwise result is NaN.
|
|
This will set `errno' to either ERANGE or EDOM,
|
|
and may return an infinity or NaN, or may do something else. */
|
|
double
|
|
DEFUN(__infnan, (error), int error)
|
|
{
|
|
switch (error)
|
|
{
|
|
case ERANGE:
|
|
errno = ERANGE;
|
|
break;
|
|
|
|
case - ERANGE:
|
|
errno = ERANGE;
|
|
break;
|
|
|
|
default:
|
|
errno = EDOM;
|
|
break;
|
|
}
|
|
|
|
/* Trigger a reserved operand fault. */
|
|
{
|
|
double result;
|
|
asm volatile("emodd %1, %1, %2, %0, %0" : "=r" (result) :
|
|
"i" (0), "i" (0x8000));
|
|
return result;
|
|
}
|
|
}
|
|
|
|
#endif
|