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Diffstat (limited to 'REORG.TODO/sysdeps/ieee754/flt-32/s_lroundf.c')
| -rw-r--r-- | REORG.TODO/sysdeps/ieee754/flt-32/s_lroundf.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/flt-32/s_lroundf.c b/REORG.TODO/sysdeps/ieee754/flt-32/s_lroundf.c new file mode 100644 index 0000000000..81cb7ab10f --- /dev/null +++ b/REORG.TODO/sysdeps/ieee754/flt-32/s_lroundf.c @@ -0,0 +1,73 @@ +/* Round float 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 +__lroundf (float x) +{ + int32_t j0; + u_int32_t i; + long int result; + int sign; + + GET_FLOAT_WORD (i, x); + j0 = ((i >> 23) & 0xff) - 0x7f; + sign = (i & 0x80000000) != 0 ? -1 : 1; + i &= 0x7fffff; + i |= 0x800000; + + if (j0 < (int32_t) (8 * sizeof (long int)) - 1) + { + if (j0 < 0) + return j0 < -1 ? 0 : sign; + else if (j0 >= 23) + result = (long int) i << (j0 - 23); + else + { + i += 0x400000 >> j0; + + result = i >> (23 - j0); + } + } + else + { +#ifdef FE_INVALID + /* The number is too large. Unless it rounds to LONG_MIN, + FE_INVALID must be raised and the return value is + unspecified. */ + if (FIX_FLT_LONG_CONVERT_OVERFLOW && x != (float) LONG_MIN) + { + feraiseexcept (FE_INVALID); + return sign == 1 ? LONG_MAX : LONG_MIN; + } +#endif + return (long int) x; + } + + return sign * result; +} + +weak_alias (__lroundf, lroundf) |