diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_lrint.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_lrint.c | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_lrint.c b/sysdeps/ieee754/dbl-64/s_lrint.c deleted file mode 100644 index ac610bfbd0..0000000000 --- a/sysdeps/ieee754/dbl-64/s_lrint.c +++ /dev/null @@ -1,127 +0,0 @@ -/* Round argument to nearest integral value according to current rounding - direction. - 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> - -static const double two52[2] = -{ - 4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */ - -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */ -}; - - -long int -__lrint (double x) -{ - int32_t j0; - u_int32_t i0, i1; - double w; - double t; - long int result; - int sx; - - EXTRACT_WORDS (i0, i1, x); - j0 = ((i0 >> 20) & 0x7ff) - 0x3ff; - sx = i0 >> 31; - i0 &= 0xfffff; - i0 |= 0x100000; - - if (j0 < 20) - { - w = math_narrow_eval (two52[sx] + x); - t = w - two52[sx]; - EXTRACT_WORDS (i0, i1, t); - j0 = ((i0 >> 20) & 0x7ff) - 0x3ff; - i0 &= 0xfffff; - i0 |= 0x100000; - - result = (j0 < 0 ? 0 : 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 - { -#if defined FE_INVALID || defined FE_INEXACT - /* X < LONG_MAX + 1 implied by J0 < 31. */ - if (sizeof (long int) == 4 - && x > (double) LONG_MAX) - { - /* In the event of overflow we must raise the "invalid" - exception, but not "inexact". */ - t = __nearbyint (x); - feraiseexcept (t == LONG_MAX ? FE_INEXACT : FE_INVALID); - } - else -#endif - { - w = math_narrow_eval (two52[sx] + x); - t = w - two52[sx]; - } - EXTRACT_WORDS (i0, i1, t); - j0 = ((i0 >> 20) & 0x7ff) - 0x3ff; - i0 &= 0xfffff; - i0 |= 0x100000; - - if (j0 == 20) - result = (long int) i0; - else - result = ((long int) i0 << (j0 - 20)) | (i1 >> (52 - j0)); - } - } - else - { - /* The number is too large. Unless it rounds to LONG_MIN, - FE_INVALID must be raised and the return value is - unspecified. */ -#if defined FE_INVALID || defined FE_INEXACT - if (sizeof (long int) == 4 - && x < (double) LONG_MIN - && x > (double) LONG_MIN - 1.0) - { - /* If truncation produces LONG_MIN, the cast will not raise - the exception, but may raise "inexact". */ - t = __nearbyint (x); - feraiseexcept (t == LONG_MIN ? FE_INEXACT : FE_INVALID); - return LONG_MIN; - } - else if (FIX_DBL_LONG_CONVERT_OVERFLOW && x != (double) LONG_MIN) - { - feraiseexcept (FE_INVALID); - return sx == 0 ? LONG_MAX : LONG_MIN; - } -#endif - return (long int) x; - } - - return sx ? -result : result; -} - -weak_alias (__lrint, lrint) -#ifdef NO_LONG_DOUBLE -strong_alias (__lrint, __lrintl) -weak_alias (__lrint, lrintl) -#endif |