GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libm/src/s_fmaf.c Lines: 0 1 0.0 %
Date: 2017-11-13 Branches: 0 0 0.0 %

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/*	$OpenBSD: s_fmaf.c,v 1.2 2012/12/05 23:20:04 deraadt Exp $	*/
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/*-
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 * Copyright (c) 2005 David Schultz <das@FreeBSD.ORG>
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <math.h>
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/*
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 * Fused multiply-add: Compute x * y + z with a single rounding error.
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 *
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 * A double has more than twice as much precision than a float, so
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 * direct double-precision arithmetic suffices.
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 *
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 * XXX We are relying on the compiler to convert from double to float
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 *     using the current rounding mode and with the appropriate
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 *     side-effects.  But on at least one platform (gcc 3.4.2/sparc64),
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 *     this appears to be too much to ask for.  The precision
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 *     reduction should be done manually.
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 */
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float
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fmaf(float x, float y, float z)
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{
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	return ((double)x * y + z);
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}