97 lines
3.5 KiB
C
97 lines
3.5 KiB
C
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/* ieee754 floating point arithmetic
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* single and double precision
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*
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* BUGS
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* not much dp done
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* doesn't generate IEEE754_INEXACT
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*
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*/
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/*
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* MIPS floating point support
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* Copyright (C) 1994-2000 Algorithmics Ltd.
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*
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* This program is free software; you can distribute it and/or modify it
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* under the terms of the GNU General Public License (Version 2) as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <linux/compiler.h>
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#include "ieee754.h"
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#include "ieee754sp.h"
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#include "ieee754dp.h"
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/*
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* Special constants
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*/
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/*
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* Older GCC requires the inner braces for initialization of union ieee754dp's
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* anonymous struct member. Without an error will result.
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*/
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#define xPCNST(s, b, m, ebias) \
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{ \
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{ \
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.sign = (s), \
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.bexp = (b) + ebias, \
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.mant = (m) \
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} \
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}
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#define DPCNST(s, b, m) \
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xPCNST(s, b, m, DP_EBIAS)
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const union ieee754dp __ieee754dp_spcvals[] = {
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DPCNST(0, DP_EMIN - 1, 0x0000000000000ULL), /* + zero */
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DPCNST(1, DP_EMIN - 1, 0x0000000000000ULL), /* - zero */
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DPCNST(0, 0, 0x0000000000000ULL), /* + 1.0 */
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DPCNST(1, 0, 0x0000000000000ULL), /* - 1.0 */
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DPCNST(0, 3, 0x4000000000000ULL), /* + 10.0 */
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DPCNST(1, 3, 0x4000000000000ULL), /* - 10.0 */
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DPCNST(0, DP_EMAX + 1, 0x0000000000000ULL), /* + infinity */
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DPCNST(1, DP_EMAX + 1, 0x0000000000000ULL), /* - infinity */
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DPCNST(0, DP_EMAX + 1, 0x7FFFFFFFFFFFFULL), /* + ind legacy qNaN */
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DPCNST(0, DP_EMAX + 1, 0x8000000000000ULL), /* + indef 2008 qNaN */
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DPCNST(0, DP_EMAX, 0xFFFFFFFFFFFFFULL), /* + max */
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DPCNST(1, DP_EMAX, 0xFFFFFFFFFFFFFULL), /* - max */
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DPCNST(0, DP_EMIN, 0x0000000000000ULL), /* + min normal */
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DPCNST(1, DP_EMIN, 0x0000000000000ULL), /* - min normal */
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DPCNST(0, DP_EMIN - 1, 0x0000000000001ULL), /* + min denormal */
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DPCNST(1, DP_EMIN - 1, 0x0000000000001ULL), /* - min denormal */
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DPCNST(0, 31, 0x0000000000000ULL), /* + 1.0e31 */
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DPCNST(0, 63, 0x0000000000000ULL), /* + 1.0e63 */
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};
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#define SPCNST(s, b, m) \
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xPCNST(s, b, m, SP_EBIAS)
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const union ieee754sp __ieee754sp_spcvals[] = {
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SPCNST(0, SP_EMIN - 1, 0x000000), /* + zero */
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SPCNST(1, SP_EMIN - 1, 0x000000), /* - zero */
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SPCNST(0, 0, 0x000000), /* + 1.0 */
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SPCNST(1, 0, 0x000000), /* - 1.0 */
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SPCNST(0, 3, 0x200000), /* + 10.0 */
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SPCNST(1, 3, 0x200000), /* - 10.0 */
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SPCNST(0, SP_EMAX + 1, 0x000000), /* + infinity */
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SPCNST(1, SP_EMAX + 1, 0x000000), /* - infinity */
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SPCNST(0, SP_EMAX + 1, 0x3FFFFF), /* + indef legacy quiet NaN */
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SPCNST(0, SP_EMAX + 1, 0x400000), /* + indef 2008 quiet NaN */
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SPCNST(0, SP_EMAX, 0x7FFFFF), /* + max normal */
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SPCNST(1, SP_EMAX, 0x7FFFFF), /* - max normal */
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SPCNST(0, SP_EMIN, 0x000000), /* + min normal */
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SPCNST(1, SP_EMIN, 0x000000), /* - min normal */
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SPCNST(0, SP_EMIN - 1, 0x000001), /* + min denormal */
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SPCNST(1, SP_EMIN - 1, 0x000001), /* - min denormal */
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SPCNST(0, 31, 0x000000), /* + 1.0e31 */
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SPCNST(0, 63, 0x000000), /* + 1.0e63 */
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};
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