GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libm/src/ld80/s_modfl.c Lines: 0 26 0.0 %
Date: 2017-11-13 Branches: 0 14 0.0 %

Line Branch Exec Source
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/* @(#)s_modf.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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 * modfl(long double x, long double *iptr)
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 * return fraction part of x, and return x's integral part in *iptr.
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 * Method:
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 *	Bit twiddling.
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 *
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 * Exception:
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 *	No exception.
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 */
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#include <math.h>
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#include "math_private.h"
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static const long double one = 1.0;
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long double
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modfl(long double x, long double *iptr)
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{
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	int32_t i0,i1,jj0;
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	u_int32_t i,se;
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	GET_LDOUBLE_WORDS(se,i0,i1,x);
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	jj0 = (se&0x7fff)-0x3fff;	/* exponent of x */
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	if(jj0<32) {			/* integer part in high x */
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	    if(jj0<0) {			/* |x|<1 */
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		SET_LDOUBLE_WORDS(*iptr,se&0x8000,0,0);	/* *iptr = +-0 */
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		return x;
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	    } else {
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		i = (0x7fffffff)>>jj0;
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		if(((i0&i)|i1)==0) {		/* x is integral */
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		    *iptr = x;
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		    SET_LDOUBLE_WORDS(x,se&0x8000,0,0);	/* return +-0 */
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		    return x;
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		} else {
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		    SET_LDOUBLE_WORDS(*iptr,se,i0&(~i),0);
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		    return x - *iptr;
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		}
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	    }
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	} else if (jj0>63) {		/* no fraction part */
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	    *iptr = x*one;
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	    /* We must handle NaNs separately.  */
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	    if (jj0 == 0x4000 && ((i0 & 0x7fffffff) | i1))
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	      return x*one;
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	    SET_LDOUBLE_WORDS(x,se&0x8000,0,0);	/* return +-0 */
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	    return x;
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	} else {			/* fraction part in low x */
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	    i = ((u_int32_t)(0x7fffffff))>>(jj0-32);
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	    if((i1&i)==0) {		/* x is integral */
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		*iptr = x;
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		SET_LDOUBLE_WORDS(x,se&0x8000,0,0);	/* return +-0 */
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		return x;
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	    } else {
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		SET_LDOUBLE_WORDS(*iptr,se,i0,i1&(~i));
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		return x - *iptr;
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	    }
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	}
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}