mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-13 23:00:22 +00:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/* Implement __kernel_standard_l.
|
|
Copyright (C) 2012-2018 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>.
|
|
|
|
Parts based on k_standard.c from fdlibm: */
|
|
|
|
/* @(#)k_standard.c 5.1 93/09/24 */
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
#include <math-svid-compat.h>
|
|
#include <fenv.h>
|
|
#include <float.h>
|
|
#include <errno.h>
|
|
|
|
|
|
#if LIBM_SVID_COMPAT
|
|
|
|
static double zero = 0.0;
|
|
|
|
/* Handle errors for a libm function as specified by TYPE (see
|
|
comments in k_standard.c for details), with arguments X and Y,
|
|
returning the appropriate return value for that function. */
|
|
|
|
long double
|
|
__kernel_standard_l (long double x, long double y, int type)
|
|
{
|
|
double dx, dy;
|
|
struct exception exc;
|
|
fenv_t env;
|
|
|
|
feholdexcept (&env);
|
|
dx = x;
|
|
dy = y;
|
|
math_force_eval (dx);
|
|
math_force_eval (dy);
|
|
fesetenv (&env);
|
|
|
|
switch (type)
|
|
{
|
|
case 221:
|
|
/* powl (x, y) overflow. */
|
|
exc.arg1 = dx;
|
|
exc.arg2 = dy;
|
|
exc.type = OVERFLOW;
|
|
exc.name = (char *) "powl";
|
|
if (_LIB_VERSION == _SVID_)
|
|
{
|
|
exc.retval = HUGE;
|
|
y *= 0.5;
|
|
if (x < zero && __rintl (y) != y)
|
|
exc.retval = -HUGE;
|
|
}
|
|
else
|
|
{
|
|
exc.retval = HUGE_VAL;
|
|
y *= 0.5;
|
|
if (x < zero && __rintl (y) != y)
|
|
exc.retval = -HUGE_VAL;
|
|
}
|
|
if (_LIB_VERSION == _POSIX_)
|
|
__set_errno (ERANGE);
|
|
else if (!matherr (&exc))
|
|
__set_errno (ERANGE);
|
|
return exc.retval;
|
|
|
|
case 222:
|
|
/* powl (x, y) underflow. */
|
|
exc.arg1 = dx;
|
|
exc.arg2 = dy;
|
|
exc.type = UNDERFLOW;
|
|
exc.name = (char *) "powl";
|
|
exc.retval = zero;
|
|
y *= 0.5;
|
|
if (x < zero && __rintl (y) != y)
|
|
exc.retval = -zero;
|
|
if (_LIB_VERSION == _POSIX_)
|
|
__set_errno (ERANGE);
|
|
else if (!matherr (&exc))
|
|
__set_errno (ERANGE);
|
|
return exc.retval;
|
|
|
|
default:
|
|
return __kernel_standard (dx, dy, type);
|
|
}
|
|
}
|
|
#endif
|