| /*- |
| * Copyright (c) 2003, Steven G. Kargl |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice unmodified, this list of conditions, and the following |
| * disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <sys/cdefs.h> |
| __FBSDID("$FreeBSD$"); |
| |
| #include <float.h> |
| #ifdef __i386__ |
| #include <ieeefp.h> |
| #endif |
| |
| #include "fpmath.h" |
| #include "math.h" |
| #include "math_private.h" |
| |
| long double |
| roundl(long double x) |
| { |
| long double t; |
| uint16_t hx; |
| |
| GET_LDBL_EXPSIGN(hx, x); |
| if ((hx & 0x7fff) == 0x7fff) |
| return (x + x); |
| |
| ENTERI(); |
| |
| if (!(hx & 0x8000)) { |
| t = floorl(x); |
| if (t - x <= -0.5L) |
| t += 1; |
| RETURNI(t); |
| } else { |
| t = floorl(-x); |
| if (t + x <= -0.5L) |
| t += 1; |
| RETURNI(-t); |
| } |
| } |
