diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_lround.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_lround.c | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_lround.c b/sysdeps/ieee754/dbl-64/s_lround.c deleted file mode 100644 index df4775e344..0000000000 --- a/sysdeps/ieee754/dbl-64/s_lround.c +++ /dev/null @@ -1,113 +0,0 @@ -/* Round double value to long int. - Copyright (C) 1997-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. - - 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 <fenv.h> -#include <limits.h> -#include <math.h> - -#include <math_private.h> -#include <fix-fp-int-convert-overflow.h> - - -long int -__lround (double x) -{ - int32_t j0; - u_int32_t i1, i0; - long int result; - int sign; - - EXTRACT_WORDS (i0, i1, x); - j0 = ((i0 >> 20) & 0x7ff) - 0x3ff; - sign = (i0 & 0x80000000) != 0 ? -1 : 1; - i0 &= 0xfffff; - i0 |= 0x100000; - - if (j0 < 20) - { - if (j0 < 0) - return j0 < -1 ? 0 : sign; - else - { - i0 += 0x80000 >> j0; - - result = i0 >> (20 - j0); - } - } - else if (j0 < (int32_t) (8 * sizeof (long int)) - 1) - { - if (j0 >= 52) - result = ((long int) i0 << (j0 - 20)) | ((long int) i1 << (j0 - 52)); - else - { - u_int32_t j = i1 + (0x80000000 >> (j0 - 20)); - if (j < i1) - ++i0; - - if (j0 == 20) - result = (long int) i0; - else - { - result = ((long int) i0 << (j0 - 20)) | (j >> (52 - j0)); -#ifdef FE_INVALID - if (sizeof (long int) == 4 - && sign == 1 - && result == LONG_MIN) - /* Rounding brought the value out of range. */ - feraiseexcept (FE_INVALID); -#endif - } - } - } - else - { - /* The number is too large. Unless it rounds to LONG_MIN, - FE_INVALID must be raised and the return value is - unspecified. */ -#ifdef FE_INVALID - if (FIX_DBL_LONG_CONVERT_OVERFLOW - && !(sign == -1 - && (sizeof (long int) == 4 - ? x > (double) LONG_MIN - 0.5 - : x >= (double) LONG_MIN))) - { - feraiseexcept (FE_INVALID); - return sign == 1 ? LONG_MAX : LONG_MIN; - } - else if (!FIX_DBL_LONG_CONVERT_OVERFLOW - && sizeof (long int) == 4 - && x <= (double) LONG_MIN - 0.5) - { - /* If truncation produces LONG_MIN, the cast will not raise - the exception, but may raise "inexact". */ - feraiseexcept (FE_INVALID); - return LONG_MIN; - } -#endif - return (long int) x; - } - - return sign * result; -} - -weak_alias (__lround, lround) -#ifdef NO_LONG_DOUBLE -strong_alias (__lround, __lroundl) -weak_alias (__lround, lroundl) -#endif |