53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
/* Copyright (C) 2002 by Red Hat, Incorporated. All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software
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* is freely granted, provided that this notice is preserved.
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*/
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/*
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FUNCTION
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<<fmax>>, <<fmaxf>>---maximum
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INDEX
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fmax
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INDEX
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fmaxf
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SYNOPSIS
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#include <math.h>
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double fmax(double <[x]>, double <[y]>);
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float fmaxf(float <[x]>, float <[y]>);
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DESCRIPTION
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The <<fmax>> functions determine the maximum numeric value of their arguments.
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NaN arguments are treated as missing data: if one argument is a NaN and the
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other numeric, then the <<fmax>> functions choose the numeric value.
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RETURNS
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The <<fmax>> functions return the maximum numeric value of their arguments.
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PORTABILITY
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ANSI C, POSIX.
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*/
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#include "fdlibm.h"
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#ifndef _DOUBLE_IS_32BITS
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#ifdef __STDC__
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double fmax(double x, double y)
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#else
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double fmax(x,y)
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double x;
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double y;
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#endif
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{
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if (__fpclassifyd(x) == FP_NAN)
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return y;
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if (__fpclassifyd(y) == FP_NAN)
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return x;
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return x > y ? x : y;
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}
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#endif /* _DOUBLE_IS_32BITS */
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