diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_lroundl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/s_lroundl.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_lroundl.c b/sysdeps/ieee754/ldbl-128ibm/s_lroundl.c deleted file mode 100644 index a5251eece0..0000000000 --- a/sysdeps/ieee754/ldbl-128ibm/s_lroundl.c +++ /dev/null @@ -1,142 +0,0 @@ -/* Round to long int long double floating-point values. - IBM extended format long double version. - Copyright (C) 2006 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <math.h> -#include <fenv_libc.h> -#include <math_ldbl_opt.h> -#include <float.h> -#include <ieee754.h> - -#ifdef __STDC__ -long -__lroundl (long double x) -#else -long -__lroundl (x) - long double x; -#endif -{ - double xh, xl; - long res, hi, lo; - - ldbl_unpack (x, &xh, &xl); - - /* Limit the range of values handled by the conversion to long. - We do this because we aren't sure whether that conversion properly - raises FE_INVALID. */ - if ( -#if __LONG_MAX__ == 2147483647 - __builtin_expect - ((__builtin_fabs (xh) <= (double) __LONG_MAX__ + 2), 1) -#else - __builtin_expect - ((__builtin_fabs (xh) <= -(double) (-__LONG_MAX__ - 1)), 1) -#endif -#if !defined (FE_INVALID) - || 1 -#endif - ) - { -#if __LONG_MAX__ == 2147483647 - long long llhi = (long long) xh; - if (llhi != (long) llhi) - hi = llhi < 0 ? -__LONG_MAX__ - 1 : __LONG_MAX__; - else - hi = llhi; - xh -= hi; -#else - if (__builtin_expect ((xh == -(double) (-__LONG_MAX__ - 1)), 0)) - { - /* When XH is 9223372036854775808.0, converting to long long will - overflow, resulting in an invalid operation. However, XL might - be negative and of sufficient magnitude that the overall long - double is in fact in range. Avoid raising an exception. In any - case we need to convert this value specially, because - the converted value is not exactly represented as a double - thus subtracting HI from XH suffers rounding error. */ - hi = __LONG_MAX__; - xh = 1.0; - } - else - { - hi = (long) xh; - xh -= hi; - } -#endif - ldbl_canonicalize (&xh, &xl); - - lo = (long) xh; - - /* Peg at max/min values, assuming that the above conversions do so. - Strictly speaking, we can return anything for values that overflow, - but this is more useful. */ - res = hi + lo; - - /* This is just sign(hi) == sign(lo) && sign(res) != sign(hi). */ - if (__builtin_expect (((~(hi ^ lo) & (res ^ hi)) < 0), 0)) - goto overflow; - - xh -= lo; - ldbl_canonicalize (&xh, &xl); - - hi = res; - if (xh > 0.5) - { - res += 1; - } - else if (xh == 0.5) - { - if (xl > 0.0 || (xl == 0.0 && res >= 0)) - res += 1; - } - else if (-xh > 0.5) - { - res -= 1; - } - else if (-xh == 0.5) - { - if (xl < 0.0 || (xl == 0.0 && res <= 0)) - res -= 1; - } - - if (__builtin_expect (((~(hi ^ (res - hi)) & (res ^ hi)) < 0), 0)) - goto overflow; - - return res; - } - else - { - if (xh > 0.0) - hi = __LONG_MAX__; - else if (xh < 0.0) - hi = -__LONG_MAX__ - 1; - else - /* Nan */ - hi = 0; - } - -overflow: -#ifdef FE_INVALID - feraiseexcept (FE_INVALID); -#endif - return hi; -} - -long_double_symbol (libm, __lroundl, lroundl); |