| /* |
| * Copyright (c) 1988, 1993 |
| * The Regents of the University of California. 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, 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. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the University of |
| * California, Berkeley and its contributors. |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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. |
| * |
| * @(#)mathimpl.h 8.1 (Berkeley) 6/4/93 |
| * $FreeBSD$ |
| */ |
| |
| #ifndef _MATHIMPL_H_ |
| #define _MATHIMPL_H_ |
| |
| #include <sys/cdefs.h> |
| #include <math.h> |
| |
| #include "../src/math_private.h" |
| |
| /* |
| * TRUNC() is a macro that sets the trailing 27 bits in the mantissa of an |
| * IEEE double variable to zero. It must be expression-like for syntactic |
| * reasons, and we implement this expression using an inline function |
| * instead of a pure macro to avoid depending on the gcc feature of |
| * statement-expressions. |
| */ |
| #define TRUNC(d) (_b_trunc(&(d))) |
| |
| static __inline void |
| _b_trunc(volatile double *_dp) |
| { |
| uint32_t _lw; |
| |
| GET_LOW_WORD(_lw, *_dp); |
| SET_LOW_WORD(*_dp, _lw & 0xf8000000); |
| } |
| |
| struct Double { |
| double a; |
| double b; |
| }; |
| |
| /* |
| * Functions internal to the math package, yet not static. |
| */ |
| double __exp__D(double, double); |
| struct Double __log__D(double); |
| |
| #endif /* !_MATHIMPL_H_ */ |
