k_standard.c

This is a resource based on j2me embedded,if you dont understand,you can connection with me .

/*
 * @(#)k_standard.c	1.15 06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.  
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER  
 *   
 * This program is free software; you can redistribute it and/or  
 * modify it under the terms of the GNU General Public License version  
 * 2 only, as published by the Free Software Foundation.   
 *   
 * This program is distributed in the hope that it will be useful, but  
 * WITHOUT ANY WARRANTY; without even the implied warranty of  
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU  
 * General Public License version 2 for more details (a copy is  
 * included at /legal/license.txt).   
 *   
 * You should have received a copy of the GNU General Public License  
 * version 2 along with this work; if not, write to the Free Software  
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  
 * 02110-1301 USA   
 *   
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa  
 * Clara, CA 95054 or visit www.sun.com if you need additional  
 * information or have any questions. 
 *
 */


#include "javavm/include/porting/ansi/errno.h"
#include "fdlibm.h"

#include "javavm/include/utils.h"
#define	WRITE2(u,v)	CVMdebugPrintf((u));

static const double zero = 0.0;	/* used as const */

/*
 * Standard conformance (non-IEEE) on exception cases.
 * Mapping:
 *	1 -- acos(|x|>1)
 *	2 -- asin(|x|>1)
 *	3 -- atan2(+-0,+-0)
 *	4 -- hypot overflow
 *	5 -- cosh overflow
 *	6 -- exp overflow
 *	7 -- exp underflow
 *	8 -- y0(0)
 *	9 -- y0(-ve)
 *	10-- y1(0)
 *	11-- y1(-ve)
 *	12-- yn(0)
 *	13-- yn(-ve)
 *	14-- lgamma(finite) overflow
 *	15-- lgamma(-integer)
 *	16-- log(0)
 *	17-- log(x<0)
 *	18-- log10(0)
 *	19-- log10(x<0)
 *	20-- pow(0.0,0.0)
 *	21-- pow(x,y) overflow
 *	22-- pow(x,y) underflow
 *	23-- pow(0,negative)
 *	24-- pow(neg,non-integral)
 *	25-- sinh(finite) overflow
 *	26-- sqrt(negative)
 *      27-- fmod(x,0)
 *      28-- remainder(x,0)
 *	29-- acosh(x<1)
 *	30-- atanh(|x|>1)
 *	31-- atanh(|x|=1)
 *	32-- scalb overflow
 *	33-- scalb underflow
 *	34-- j0(|x|>X_TLOSS)
 *	35-- y0(x>X_TLOSS)
 *	36-- j1(|x|>X_TLOSS)
 *	37-- y1(x>X_TLOSS)
 *	38-- jn(|x|>X_TLOSS, n)
 *	39-- yn(x>X_TLOSS, n)
 *	40-- gamma(finite) overflow
 *	41-- gamma(-integer)
 *	42-- pow(NaN,0.0)
 */


#ifdef __STDC__
	double __kernel_standard(double x, double y, int type)
#else
	double __kernel_standard(x,y,type)
	double x,y; int type;
#endif
{
	struct CVMfdlibmException exc;
#ifndef HUGE_VAL	/* this is the only routine that uses HUGE_VAL */
#define HUGE_VAL inf
	double inf = 0.0;

	__HI(inf) = 0x7ff00000;	/* set inf to infinite */
#endif

#ifdef _USE_WRITE
	(void) fflush(stdout);
#endif
	exc.arg1 = x;
	exc.arg2 = y;
	switch(type) {
	    case 1:
		/* acos(|x|>1) */
		exc.type = DOMAIN;
		exc.name = "acos";
		exc.retval = zero;
		if (_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if(_LIB_VERSION == _SVID_) {
		    WRITE2("acos: DOMAIN error\n", 19);
		  }
		  errno = EDOM;
		}
		break;
	    case 2:
		/* asin(|x|>1) */
		exc.type = DOMAIN;
		exc.name = "asin";
		exc.retval = zero;
		if(_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if(_LIB_VERSION == _SVID_) {
		    	WRITE2("asin: DOMAIN error\n", 19);
		  }
		  errno = EDOM;
		}
		break;
	    case 3:
		/* atan2(+-0,+-0) */
		exc.arg1 = y;
		exc.arg2 = x;
		exc.type = DOMAIN;
		exc.name = "atan2";
		exc.retval = zero;
		if(_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if(_LIB_VERSION == _SVID_) {
			WRITE2("atan2: DOMAIN error\n", 20);
		      }
		  errno = EDOM;
		}
		break;
	    case 4:
		/* hypot(finite,finite) overflow */
		exc.type = OVERFLOW;
		exc.name = "hypot";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = HUGE;
		else
		  exc.retval = HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = ERANGE;
		else if (!matherr(&exc)) {
			errno = ERANGE;
		}
		break;
	    case 5:
		/* cosh(finite) overflow */
		exc.type = OVERFLOW;
		exc.name = "cosh";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = HUGE;
		else
		  exc.retval = HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = ERANGE;
		else if (!matherr(&exc)) {
			errno = ERANGE;
		}
		break;
	    case 6:
		/* exp(finite) overflow */
		exc.type = OVERFLOW;
		exc.name = "exp";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = HUGE;
		else
		  exc.retval = HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = ERANGE;
		else if (!matherr(&exc)) {
			errno = ERANGE;
		}
		break;
	    case 7:
		/* exp(finite) underflow */
		exc.type = UNDERFLOW;
		exc.name = "exp";
		exc.retval = zero;
		if (_LIB_VERSION == _POSIX_)
		  errno = ERANGE;
		else if (!matherr(&exc)) {
			errno = ERANGE;
		}
		break;
	    case 8:
		/* y0(0) = -inf */
		exc.type = DOMAIN;	/* should be SING for IEEE */
		exc.name = "y0";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = -HUGE;
		else
		  exc.retval = -HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if (_LIB_VERSION == _SVID_) {
			WRITE2("y0: DOMAIN error\n", 17);
		      }
		  errno = EDOM;
		}
		break;
	    case 9:
		/* y0(x<0) = NaN */
		exc.type = DOMAIN;
		exc.name = "y0";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = -HUGE;
		else
		  exc.retval = -HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if (_LIB_VERSION == _SVID_) {
			WRITE2("y0: DOMAIN error\n", 17);
		      }
		  errno = EDOM;
		}
		break;
	    case 10:
		/* y1(0) = -inf */
		exc.type = DOMAIN;	/* should be SING for IEEE */
		exc.name = "y1";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = -HUGE;
		else
		  exc.retval = -HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if (_LIB_VERSION == _SVID_) {
			WRITE2("y1: DOMAIN error\n", 17);
		      }
		  errno = EDOM;
		}
		break;
	    case 11:
		/* y1(x<0) = NaN */
		exc.type = DOMAIN;
		exc.name = "y1";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = -HUGE;
		else
		  exc.retval = -HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if (_LIB_VERSION == _SVID_) {
			WRITE2("y1: DOMAIN error\n", 17);
		      }
		  errno = EDOM;
		}
		break;
	    case 12:
		/* yn(n,0) = -inf */
		exc.type = DOMAIN;	/* should be SING for IEEE */
		exc.name = "yn";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = -HUGE;
		else
		  exc.retval = -HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if (_LIB_VERSION == _SVID_) {
			WRITE2("yn: DOMAIN error\n", 17);
		      }
		  errno = EDOM;
		}
		break;
	    case 13:
		/* yn(x<0) = NaN */
		exc.type = DOMAIN;
		exc.name = "yn";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = -HUGE;
		else
		  exc.retval = -HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if (_LIB_VERSION == _SVID_) {
			WRITE2("yn: DOMAIN error\n", 17);
		      }
		  errno = EDOM;
		}
		break;
	    case 14:
		/* lgamma(finite) overflow */
		exc.type = OVERFLOW;
		exc.name = "lgamma";
                if (_LIB_VERSION == _SVID_)
                  exc.retval = HUGE;
                else
                  exc.retval = HUGE_VAL;
                if (_LIB_VERSION == _POSIX_)
			errno = ERANGE;
                else if (!matherr(&exc)) {
                        errno = ERANGE;
		}
		break;
	    case 15:
		/* lgamma(-integer) or lgamma(0) */
		exc.type = SING;
		exc.name = "lgamma";
                if (_LIB_VERSION == _SVID_)
                  exc.retval = HUGE;
                else
                  exc.retval = HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if (_LIB_VERSION == _SVID_) {
			WRITE2("lgamma: SING error\n", 19);
		      }
		  errno = EDOM;
		}
		break;
	    case 16:
		/* log(0) */
		exc.type = SING;
		exc.name = "log";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = -HUGE;
		else
		  exc.retval = -HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = ERANGE;
		else if (!matherr(&exc)) {
		  if (_LIB_VERSION == _SVID_) {
			WRITE2("log: SING error\n", 16);
		      }
		  errno = EDOM;
		}
		break;
	    case 17:
		/* log(x<0) */
		exc.type = DOMAIN;
		exc.name = "log";
		if (_LIB_VERSION == _SVID_)
		  exc.retval = -HUGE;
		else
		  exc.retval = -HUGE_VAL;
		if (_LIB_VERSION == _POSIX_)
		  errno = EDOM;
		else if (!matherr(&exc)) {
		  if (_LIB_VERSION == _SVID_) {
			WRITE2("log: DOMAIN error\n", 18);
		      }
		  errno = EDOM;
		}
		break;
	    case 18:
		/* log10(0) */