[linux-2.6-block.git] / arch / mips / math-emu / sp_frexp.c

/* IEEE754 floating point arithmetic
 * single precision
 */
/*
 * MIPS floating point support
 * Copyright (C) 1994-2000 Algorithmics Ltd.
 *
 * ########################################################################
 *
 *  This program is free software; you can distribute it and/or modify it
 *  under the terms of the GNU General Public License (Version 2) as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope 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
 *  for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * ########################################################################
 */


#include "ieee754sp.h"

/* close to ieeep754sp_logb
*/
ieee754sp ieee754sp_frexp(ieee754sp x, int *eptr)
{
	COMPXSP;
	CLEARCX;
	EXPLODEXSP;

	switch (xc) {
	case IEEE754_CLASS_SNAN:
	case IEEE754_CLASS_QNAN:
	case IEEE754_CLASS_INF:
	case IEEE754_CLASS_ZERO:
		*eptr = 0;
		return x;
	case IEEE754_CLASS_DNORM:
		SPDNORMX;
		break;
	case IEEE754_CLASS_NORM:
		break;
	}
	*eptr = xe + 1;
	return buildsp(xs, -1 + SP_EBIAS, xm & ~SP_HIDDEN_BIT);
}
Commit	Line	Data
1da177e4 LT	1	/* IEEE754 floating point arithmetic
	2	* single precision
	3	*/
	4	/*
	5	* MIPS floating point support
	6	* Copyright (C) 1994-2000 Algorithmics Ltd.
1da177e4 LT	7	*
	8	* ########################################################################
	9	*
	10	* This program is free software; you can distribute it and/or modify it
	11	* under the terms of the GNU General Public License (Version 2) as
	12	* published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope it will be useful, but WITHOUT
	15	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	16	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	17	* for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write to the Free Software Foundation, Inc.,
	21	* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
	22	*
	23	* ########################################################################
	24	*/
	25
	26
	27	#include "ieee754sp.h"
	28
	29	/* close to ieeep754sp_logb
	30	*/
	31	ieee754sp ieee754sp_frexp(ieee754sp x, int *eptr)
	32	{
	33	COMPXSP;
	34	CLEARCX;
	35	EXPLODEXSP;
	36
	37	switch (xc) {
	38	case IEEE754_CLASS_SNAN:
	39	case IEEE754_CLASS_QNAN:
	40	case IEEE754_CLASS_INF:
	41	case IEEE754_CLASS_ZERO:
	42	*eptr = 0;
	43	return x;
	44	case IEEE754_CLASS_DNORM:
	45	SPDNORMX;
	46	break;
	47	case IEEE754_CLASS_NORM:
	48	break;
	49	}
	50	*eptr = xe + 1;
	51	return buildsp(xs, -1 + SP_EBIAS, xm & ~SP_HIDDEN_BIT);
	52	}