diff options
Diffstat (limited to 'sysdeps/ieee754')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c | 80 | ||||
| -rw-r--r-- | sysdeps/ieee754/dbl-64/wordsize-64/s_lround.c | 80 |
2 files changed, 80 insertions, 80 deletions
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c index f7c9ea568f..4a72005d05 100644 --- a/sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c +++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c @@ -1 +1,79 @@ -/* The code is the same as lround. Use an alias, see l_round.c. */ +/* Round double value to long long int. + Copyright (C) 1997-2012 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/>. */ + +#define lround __hidden_lround +#define __lround __hidden___lround + +#include <math.h> + +#include <math_private.h> + + +long long int +__llround (double x) +{ + int32_t j0; + int64_t i0; + long long int result; + int sign; + + EXTRACT_WORDS64 (i0, x); + j0 = ((i0 >> 52) & 0x7ff) - 0x3ff; + sign = i0 < 0 ? -1 : 1; + i0 &= UINT64_C(0xfffffffffffff); + i0 |= UINT64_C(0x10000000000000); + + if (j0 < (int32_t) (8 * sizeof (long long int)) - 1) + { + if (j0 < 0) + return j0 < -1 ? 0 : sign; + else if (j0 >= 52) + result = i0 << (j0 - 52); + else + { + i0 += UINT64_C(0x8000000000000) >> j0; + + result = i0 >> (52 - j0); + } + } + else + { + /* The number is too large. It is left implementation defined + what happens. */ + return (long long int) x; + } + + return sign * result; +} + +weak_alias (__llround, llround) +#ifdef NO_LONG_DOUBLE +strong_alias (__llround, __lroundl) +weak_alias (__llround, lroundl) +#endif + +/* long has the same width as long long on 64-bit machines. */ +#undef lround +#undef __lround +strong_alias (__llround, __lround) +weak_alias (__llround, lround) +#ifdef NO_LONG_DOUBLE +strong_alias (__llround, __llroundl) +weak_alias (__llround, llroundl) +#endif diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_lround.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_lround.c index e3a1db0d50..1e06fcb16e 100644 --- a/sysdeps/ieee754/dbl-64/wordsize-64/s_lround.c +++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_lround.c @@ -1,79 +1 @@ -/* Round double value to long int. - Copyright (C) 1997, 2004, 2009 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/>. */ - -#define llround __hidden_llround -#define __llround __hidden___llround - -#include <math.h> - -#include <math_private.h> - - -long int -__lround (double x) -{ - int32_t j0; - int64_t i0; - long int result; - int sign; - - EXTRACT_WORDS64 (i0, x); - j0 = ((i0 >> 52) & 0x7ff) - 0x3ff; - sign = i0 < 0 ? -1 : 1; - i0 &= UINT64_C(0xfffffffffffff); - i0 |= UINT64_C(0x10000000000000); - - if (j0 < (int32_t) (8 * sizeof (long int)) - 1) - { - if (j0 < 0) - return j0 < -1 ? 0 : sign; - else if (j0 >= 52) - result = i0 << (j0 - 52); - else - { - i0 += UINT64_C(0x8000000000000) >> j0; - - result = i0 >> (52 - j0); - } - } - else - { - /* The number is too large. It is left implementation defined - what happens. */ - return (long int) x; - } - - return sign * result; -} - -weak_alias (__lround, lround) -#ifdef NO_LONG_DOUBLE -strong_alias (__lround, __lroundl) -weak_alias (__lround, lroundl) -#endif - -/* long long has the same width as long on 64-bit machines. */ -#undef llround -#undef __llround -strong_alias (__lround, __llround) -weak_alias (__lround, llround) -#ifdef NO_LONG_DOUBLE -strong_alias (__lround, __llroundl) -weak_alias (__lround, llroundl) -#endif +/* The code is the same as llround. Use an alias, see s_llround.c. */ |