diff options
Diffstat (limited to 'REORG.TODO/sysdeps/ieee754/flt-32/s_roundf.c')
| -rw-r--r-- | REORG.TODO/sysdeps/ieee754/flt-32/s_roundf.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/ieee754/flt-32/s_roundf.c b/REORG.TODO/sysdeps/ieee754/flt-32/s_roundf.c new file mode 100644 index 0000000000..7ea0d97756 --- /dev/null +++ b/REORG.TODO/sysdeps/ieee754/flt-32/s_roundf.c @@ -0,0 +1,63 @@ +/* Round float to integer away from zero. + 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 <math.h> + +#include <math_private.h> + + +float +__roundf (float x) +{ + int32_t i0, j0; + + GET_FLOAT_WORD (i0, x); + j0 = ((i0 >> 23) & 0xff) - 0x7f; + if (j0 < 23) + { + if (j0 < 0) + { + i0 &= 0x80000000; + if (j0 == -1) + i0 |= 0x3f800000; + } + else + { + u_int32_t i = 0x007fffff >> j0; + if ((i0 & i) == 0) + /* X is integral. */ + return x; + + i0 += 0x00400000 >> j0; + i0 &= ~i; + } + } + else + { + if (j0 == 0x80) + /* Inf or NaN. */ + return x + x; + else + return x; + } + + SET_FLOAT_WORD (x, i0); + return x; +} +weak_alias (__roundf, roundf) |