GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libm/src/ld80/s_ceill.c Lines: 0 29 0.0 %
Date: 2017-11-13 Branches: 0 34 0.0 %

Line Branch Exec Source
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/* @(#)s_ceil.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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 * ceill(x)
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 * Return x rounded toward -inf to integral value
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 * Method:
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 *	Bit twiddling.
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 * Exception:
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 *	Inexact flag raised if x not equal to ceil(x).
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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 huge = 1.0e4930L;
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long double
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ceill(long double x)
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{
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	int32_t i1,jj0;
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	u_int32_t i,j,se,i0,sx;
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	GET_LDOUBLE_WORDS(se,i0,i1,x);
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	sx = (se>>15)&1;
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	jj0 = (se&0x7fff)-0x3fff;
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	if(jj0<31) {
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	    if(jj0<0) {	/* raise inexact if x != 0 */
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		if(huge+x>0.0) {/* return 0*sign(x) if |x|<1 */
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		    if(sx) {se=0x8000;i0=0;i1=0;}
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		    else if((i0|i1)!=0) { se=0x3fff;i0=0x80000000;i1=0;}
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		}
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	    } else {
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		i = (0x7fffffff)>>jj0;
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		if(((i0&i)|i1)==0) return x; /* x is integral */
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		if(huge+x>0.0) {	/* raise inexact flag */
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		    if(sx==0) {
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			if (jj0>0 && (i0+(0x80000000>>jj0))>i0)
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			  i0+=0x80000000>>jj0;
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			else
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			  {
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			    i = 0x7fffffff;
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			    ++se;
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			  }
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		    }
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		    i0 &= (~i); i1=0;
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		}
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	    }
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	} else if (jj0>62) {
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	    if(jj0==0x4000) return x+x;	/* inf or NaN */
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	    else return x;		/* x is integral */
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	} else {
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	    i = ((u_int32_t)(0xffffffff))>>(jj0-31);
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	    if((i1&i)==0) return x;	/* x is integral */
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	    if(huge+x>0.0) {		/* raise inexact flag */
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		if(sx==0) {
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		    if(jj0==31) i0+=1;
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		    else {
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			j = i1 + (1<<(63-jj0));
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			if(j<i1) i0+=1;	/* got a carry */
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			i1 = j;
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		    }
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		}
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		i1 &= (~i);
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	    }
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	}
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	SET_LDOUBLE_WORDS(x,se,i0,i1);
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	return x;
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}