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f56f91245a
Bug 17724 reports references to fesetround being brought in by ldbl-128ibm rintl via references to __rintl from __kernel_standard_l. Because all three __kernel_standard* functions are in the same file, this gets brought in even though only the long double version __kernel_standard_l needs __rintl, and the C90 functions use only __kernel_standard. This patch fixes this by splitting the three versions into separate files; it's fine for long double functions to refer to fe* functions directly, unless they get called by C90 double functions. Tested for x86_64 (testsuite; the reordering of code means disassembly of shared libraries can't usefully be compared). Tested for powerpc that the relevant issue disappears from the linknamespace test output. [BZ #17724] * sysdeps/ieee754/k_standard.c: Don't include <float.h>. (__kernel_standard_f): Remove. Moved to k_standardf.c. (__kernel_standard_l): Remove. Moved to k_standardl.c with (char *) casts added. * sysdeps/ieee754/k_standardf.c: New file. * sysdeps/ieee754/k_standardl.c: Likewise. * math/Makefile (libm-support): Remove k_standard. (libm-calls): Add k_standard.
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
/* Implement __kernel_standard_l.
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Copyright (C) 2012-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>.
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Parts based on k_standard.c from fdlibm: */
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/* @(#)k_standard.c 5.1 93/09/24 */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#include <math.h>
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#include <math_private.h>
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#include <float.h>
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#include <errno.h>
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static double zero = 0.0;
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/* Handle errors for a libm function as specified by TYPE (see
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comments in k_standard.c for details), with arguments X and Y,
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returning the appropriate return value for that function. */
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long double
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__kernel_standard_l (long double x, long double y, int type)
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{
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double dx, dy;
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struct exception exc;
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if (isfinite (x))
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{
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long double ax = fabsl (x);
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if (ax > DBL_MAX)
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dx = __copysignl (DBL_MAX, x);
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else if (ax > 0 && ax < DBL_MIN)
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dx = __copysignl (DBL_MIN, x);
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else
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dx = x;
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}
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else
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dx = x;
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if (isfinite (y))
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{
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long double ay = fabsl (y);
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if (ay > DBL_MAX)
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dy = __copysignl (DBL_MAX, y);
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else if (ay > 0 && ay < DBL_MIN)
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dy = __copysignl (DBL_MIN, y);
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else
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dy = y;
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}
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else
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dy = y;
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switch (type)
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{
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case 221:
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/* powl (x, y) overflow. */
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exc.arg1 = dx;
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exc.arg2 = dy;
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exc.type = OVERFLOW;
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exc.name = (char *) "powl";
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if (_LIB_VERSION == _SVID_)
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{
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exc.retval = HUGE;
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y *= 0.5;
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if (x < zero && __rintl (y) != y)
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exc.retval = -HUGE;
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}
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else
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{
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exc.retval = HUGE_VAL;
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y *= 0.5;
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if (x < zero && __rintl (y) != y)
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exc.retval = -HUGE_VAL;
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}
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if (_LIB_VERSION == _POSIX_)
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__set_errno (ERANGE);
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else if (!matherr (&exc))
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__set_errno (ERANGE);
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return exc.retval;
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case 222:
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/* powl (x, y) underflow. */
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exc.arg1 = dx;
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exc.arg2 = dy;
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exc.type = UNDERFLOW;
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exc.name = (char *) "powl";
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exc.retval = zero;
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y *= 0.5;
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if (x < zero && __rintl (y) != y)
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exc.retval = -zero;
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if (_LIB_VERSION == _POSIX_)
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__set_errno (ERANGE);
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else if (!matherr (&exc))
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__set_errno (ERANGE);
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return exc.retval;
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default:
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return __kernel_standard (dx, dy, type);
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}
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}
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