94 lines
3.4 KiB
C
94 lines
3.4 KiB
C
/* ieee754 floating point arithmetic
|
|
* single and double precision
|
|
*
|
|
* BUGS
|
|
* not much dp done
|
|
* doesn't generate IEEE754_INEXACT
|
|
*
|
|
*/
|
|
/*
|
|
* 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.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include <linux/compiler.h>
|
|
|
|
#include "ieee754.h"
|
|
#include "ieee754sp.h"
|
|
#include "ieee754dp.h"
|
|
|
|
/*
|
|
* Special constants
|
|
*/
|
|
|
|
/*
|
|
* Older GCC requires the inner braces for initialization of union ieee754dp's
|
|
* anonymous struct member. Without an error will result.
|
|
*/
|
|
#define xPCNST(s, b, m, ebias) \
|
|
{ \
|
|
{ \
|
|
.sign = (s), \
|
|
.bexp = (b) + ebias, \
|
|
.mant = (m) \
|
|
} \
|
|
}
|
|
|
|
#define DPCNST(s, b, m) \
|
|
xPCNST(s, b, m, DP_EBIAS)
|
|
|
|
const union ieee754dp __ieee754dp_spcvals[] = {
|
|
DPCNST(0, DP_EMIN - 1, 0x0000000000000ULL), /* + zero */
|
|
DPCNST(1, DP_EMIN - 1, 0x0000000000000ULL), /* - zero */
|
|
DPCNST(0, 0, 0x0000000000000ULL), /* + 1.0 */
|
|
DPCNST(1, 0, 0x0000000000000ULL), /* - 1.0 */
|
|
DPCNST(0, 3, 0x4000000000000ULL), /* + 10.0 */
|
|
DPCNST(1, 3, 0x4000000000000ULL), /* - 10.0 */
|
|
DPCNST(0, DP_EMAX + 1, 0x0000000000000ULL), /* + infinity */
|
|
DPCNST(1, DP_EMAX + 1, 0x0000000000000ULL), /* - infinity */
|
|
DPCNST(0, DP_EMAX + 1, 0x7FFFFFFFFFFFFULL), /* + indef quiet Nan */
|
|
DPCNST(0, DP_EMAX, 0xFFFFFFFFFFFFFULL), /* + max */
|
|
DPCNST(1, DP_EMAX, 0xFFFFFFFFFFFFFULL), /* - max */
|
|
DPCNST(0, DP_EMIN, 0x0000000000000ULL), /* + min normal */
|
|
DPCNST(1, DP_EMIN, 0x0000000000000ULL), /* - min normal */
|
|
DPCNST(0, DP_EMIN - 1, 0x0000000000001ULL), /* + min denormal */
|
|
DPCNST(1, DP_EMIN - 1, 0x0000000000001ULL), /* - min denormal */
|
|
DPCNST(0, 31, 0x0000000000000ULL), /* + 1.0e31 */
|
|
DPCNST(0, 63, 0x0000000000000ULL), /* + 1.0e63 */
|
|
};
|
|
|
|
#define SPCNST(s, b, m) \
|
|
xPCNST(s, b, m, SP_EBIAS)
|
|
|
|
const union ieee754sp __ieee754sp_spcvals[] = {
|
|
SPCNST(0, SP_EMIN - 1, 0x000000), /* + zero */
|
|
SPCNST(1, SP_EMIN - 1, 0x000000), /* - zero */
|
|
SPCNST(0, 0, 0x000000), /* + 1.0 */
|
|
SPCNST(1, 0, 0x000000), /* - 1.0 */
|
|
SPCNST(0, 3, 0x200000), /* + 10.0 */
|
|
SPCNST(1, 3, 0x200000), /* - 10.0 */
|
|
SPCNST(0, SP_EMAX + 1, 0x000000), /* + infinity */
|
|
SPCNST(1, SP_EMAX + 1, 0x000000), /* - infinity */
|
|
SPCNST(0, SP_EMAX + 1, 0x3FFFFF), /* + indef quiet Nan */
|
|
SPCNST(0, SP_EMAX, 0x7FFFFF), /* + max normal */
|
|
SPCNST(1, SP_EMAX, 0x7FFFFF), /* - max normal */
|
|
SPCNST(0, SP_EMIN, 0x000000), /* + min normal */
|
|
SPCNST(1, SP_EMIN, 0x000000), /* - min normal */
|
|
SPCNST(0, SP_EMIN - 1, 0x000001), /* + min denormal */
|
|
SPCNST(1, SP_EMIN - 1, 0x000001), /* - min denormal */
|
|
SPCNST(0, 31, 0x000000), /* + 1.0e31 */
|
|
SPCNST(0, 63, 0x000000), /* + 1.0e63 */
|
|
};
|