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[/] [or1k/] [trunk/] [newlib/] [newlib/] [libm/] [math/] [w_remainder.c] - Blame information for rev 1765

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/* @(#)w_remainder.c 5.1 93/09/24 */
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/*
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 * ====================================================
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 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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 *
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 * Developed at SunPro, a Sun Microsystems, Inc. business.
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 * Permission to use, copy, modify, and distribute this
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 * software is freely granted, provided that this notice
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 * is preserved.
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 * ====================================================
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 */
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/*
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FUNCTION
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<<remainder>>, <<remainderf>>---round and  remainder
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INDEX
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        remainder
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INDEX
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        remainderf
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ANSI_SYNOPSIS
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        #include <math.h>
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        double remainder(double <[x]>, double <[y]>);
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        float remainderf(float <[x]>, float <[y]>);
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TRAD_SYNOPSIS
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        #include <math.h>
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        double remainder(<[x]>,<[y]>)
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        double <[x]>, <[y]>;
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        float remainderf(<[x]>,<[y]>)
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        float <[x]>, <[y]>;
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DESCRIPTION
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<<remainder>> and <<remainderf>> find the remainder of
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<[x]>/<[y]>; this value is in the range -<[y]>/2 .. +<[y]>/2.
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RETURNS
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<<remainder>> returns the integer result as a double.
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PORTABILITY
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<<remainder>> is a System V release 4.
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<<remainderf>> is an extension.
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*/
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/*
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 * wrapper remainder(x,p)
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 */
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#include "fdlibm.h"
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#include <errno.h>
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#ifndef _DOUBLE_IS_32BITS
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#ifdef __STDC__
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        double remainder(double x, double y)    /* wrapper remainder */
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#else
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        double remainder(x,y)                   /* wrapper remainder */
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        double x,y;
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#endif
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{
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#ifdef _IEEE_LIBM
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        return __ieee754_remainder(x,y);
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#else
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        double z;
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        struct exception exc;
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        z = __ieee754_remainder(x,y);
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        if(_LIB_VERSION == _IEEE_ || isnan(y)) return z;
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        if(y==0.0) {
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            /* remainder(x,0) */
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            exc.type = DOMAIN;
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            exc.name = "remainder";
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            exc.err = 0;
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            exc.arg1 = x;
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            exc.arg2 = y;
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            exc.retval = 0.0/0.0;
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            if (_LIB_VERSION == _POSIX_)
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               errno = EDOM;
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            else if (!matherr(&exc)) {
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               errno = EDOM;
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            }
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            if (exc.err != 0)
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               errno = exc.err;
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            return exc.retval;
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        } else
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            return z;
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#endif
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}
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#endif /* defined(_DOUBLE_IS_32BITS) */
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