| /* Copyright (C) 2007-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Richard Henderson. |
| |
| 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> |
| |
| float |
| __nearbyintf (float x) |
| { |
| if (isless (fabsf (x), 16777216.0f)) /* 1 << FLT_MANT_DIG */ |
| { |
| /* Note that Alpha S_Floating is stored in registers in a |
| restricted T_Floating format, so we don't even need to |
| convert back to S_Floating in the end. The initial |
| conversion to T_Floating is needed to handle denormals. */ |
| |
| float tmp1, tmp2, new_x; |
| |
| __asm ("cvtst/s %3,%2\n\t" |
| "cvttq/svd %2,%1\n\t" |
| "cvtqt/d %1,%0\n\t" |
| : "=f"(new_x), "=&f"(tmp1), "=&f"(tmp2) |
| : "f"(x)); |
| |
| /* nearbyintf(-0.1) == -0, and in general we'll always have the same |
| sign as our input. */ |
| x = copysignf(new_x, x); |
| } |
| return x; |
| } |
| |
| weak_alias (__nearbyintf, nearbyintf) |
