mirror of
git://sourceware.org/git/glibc.git
synced 2025-01-06 12:00:24 +08:00
0d13dfa17b
The sysdeps/ieee754/ldbl-opt version of math_ldbl_opt.h includes math.h and math_private.h, despite not having any need for those headers itself; the sysdeps/generic version doesn't. About 20 files are relying on math_ldbl_opt.h to include math.h and/or math_private.h for them, even though none of them necessarily used on a platform that needs ldbl-opt support. * sysdeps/ieee754/ldbl-opt/math_ldbl_opt.h: Don't include math.h or math_private.h. * sysdeps/alpha/fpu/s_isnan.c * sysdeps/ieee754/ldbl-128ibm/s_ceill.c * sysdeps/ieee754/ldbl-128ibm/s_floorl.c * sysdeps/ieee754/ldbl-128ibm/s_llrintl.c * sysdeps/ieee754/ldbl-128ibm/s_llroundl.c * sysdeps/ieee754/ldbl-128ibm/s_lrintl.c * sysdeps/ieee754/ldbl-128ibm/s_lroundl.c * sysdeps/ieee754/ldbl-128ibm/s_rintl.c * sysdeps/ieee754/ldbl-128ibm/s_roundl.c * sysdeps/ieee754/ldbl-128ibm/s_truncl.c * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypot.c * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/e_hypotf.c: * sysdeps/powerpc/powerpc64/fpu/multiarch/e_expf.c * sysdeps/powerpc/powerpc64/fpu/multiarch/e_hypot.c * sysdeps/powerpc/powerpc64/fpu/multiarch/e_hypotf.c: Include math_private.h. * sysdeps/ieee754/ldbl-64-128/s_finitel.c * sysdeps/ieee754/ldbl-64-128/s_fpclassifyl.c * sysdeps/ieee754/ldbl-64-128/s_isinfl.c * sysdeps/ieee754/ldbl-64-128/s_isnanl.c * sysdeps/ieee754/ldbl-64-128/s_signbitl.c * sysdeps/powerpc/power7/fpu/s_logb.c: Include math.h and math_private.h.
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/* Truncate (toward zero) long double floating-point values.
|
|
IBM extended format long double version.
|
|
Copyright (C) 2006-2018 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/>. */
|
|
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
#include <math_ldbl_opt.h>
|
|
#include <float.h>
|
|
#include <ieee754.h>
|
|
|
|
|
|
long double
|
|
__truncl (long double x)
|
|
{
|
|
double xh, xl, hi, lo;
|
|
|
|
ldbl_unpack (x, &xh, &xl);
|
|
|
|
/* Return Inf, Nan, +/-0 unchanged. */
|
|
if (__builtin_expect (xh != 0.0
|
|
&& __builtin_isless (__builtin_fabs (xh),
|
|
__builtin_inf ()), 1))
|
|
{
|
|
hi = __trunc (xh);
|
|
if (hi != xh)
|
|
{
|
|
/* The high part is not an integer; the low part does not
|
|
affect the result. */
|
|
xh = hi;
|
|
xl = 0;
|
|
}
|
|
else
|
|
{
|
|
/* The high part is a nonzero integer. */
|
|
lo = xh > 0 ? __floor (xl) : __ceil (xl);
|
|
xh = hi;
|
|
xl = lo;
|
|
ldbl_canonicalize_int (&xh, &xl);
|
|
}
|
|
}
|
|
else
|
|
/* Quiet signaling NaN arguments. */
|
|
xh += xh;
|
|
|
|
return ldbl_pack (xh, xl);
|
|
}
|
|
|
|
long_double_symbol (libm, __truncl, truncl);
|