mirror of
https://github.com/adulau/aha.git
synced 2024-12-30 12:46:17 +00:00
8142294dda
Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
128 lines
3.9 KiB
C
128 lines
3.9 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.
|
|
* http://www.algor.co.uk
|
|
*
|
|
* ########################################################################
|
|
*
|
|
* 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 "ieee754int.h"
|
|
#include "ieee754sp.h"
|
|
#include "ieee754dp.h"
|
|
|
|
#define DP_EBIAS 1023
|
|
#define DP_EMIN (-1022)
|
|
#define DP_EMAX 1023
|
|
|
|
#define SP_EBIAS 127
|
|
#define SP_EMIN (-126)
|
|
#define SP_EMAX 127
|
|
|
|
/* special constants
|
|
*/
|
|
|
|
|
|
#if (defined(BYTE_ORDER) && BYTE_ORDER == LITTLE_ENDIAN) || defined(__MIPSEL__)
|
|
#define SPSTR(s, b, m) {m, b, s}
|
|
#define DPSTR(s, b, mh, ml) {ml, mh, b, s}
|
|
#endif
|
|
|
|
#ifdef __MIPSEB__
|
|
#define SPSTR(s, b, m) {s, b, m}
|
|
#define DPSTR(s, b, mh, ml) {s, b, mh, ml}
|
|
#endif
|
|
|
|
const struct ieee754dp_konst __ieee754dp_spcvals[] = {
|
|
DPSTR(0, DP_EMIN - 1 + DP_EBIAS, 0, 0), /* + zero */
|
|
DPSTR(1, DP_EMIN - 1 + DP_EBIAS, 0, 0), /* - zero */
|
|
DPSTR(0, DP_EBIAS, 0, 0), /* + 1.0 */
|
|
DPSTR(1, DP_EBIAS, 0, 0), /* - 1.0 */
|
|
DPSTR(0, 3 + DP_EBIAS, 0x40000, 0), /* + 10.0 */
|
|
DPSTR(1, 3 + DP_EBIAS, 0x40000, 0), /* - 10.0 */
|
|
DPSTR(0, DP_EMAX + 1 + DP_EBIAS, 0, 0), /* + infinity */
|
|
DPSTR(1, DP_EMAX + 1 + DP_EBIAS, 0, 0), /* - infinity */
|
|
DPSTR(0, DP_EMAX+1+DP_EBIAS, 0x7FFFF, 0xFFFFFFFF), /* + indef quiet Nan */
|
|
DPSTR(0, DP_EMAX + DP_EBIAS, 0xFFFFF, 0xFFFFFFFF), /* + max */
|
|
DPSTR(1, DP_EMAX + DP_EBIAS, 0xFFFFF, 0xFFFFFFFF), /* - max */
|
|
DPSTR(0, DP_EMIN + DP_EBIAS, 0, 0), /* + min normal */
|
|
DPSTR(1, DP_EMIN + DP_EBIAS, 0, 0), /* - min normal */
|
|
DPSTR(0, DP_EMIN - 1 + DP_EBIAS, 0, 1), /* + min denormal */
|
|
DPSTR(1, DP_EMIN - 1 + DP_EBIAS, 0, 1), /* - min denormal */
|
|
DPSTR(0, 31 + DP_EBIAS, 0, 0), /* + 1.0e31 */
|
|
DPSTR(0, 63 + DP_EBIAS, 0, 0), /* + 1.0e63 */
|
|
};
|
|
|
|
const struct ieee754sp_konst __ieee754sp_spcvals[] = {
|
|
SPSTR(0, SP_EMIN - 1 + SP_EBIAS, 0), /* + zero */
|
|
SPSTR(1, SP_EMIN - 1 + SP_EBIAS, 0), /* - zero */
|
|
SPSTR(0, SP_EBIAS, 0), /* + 1.0 */
|
|
SPSTR(1, SP_EBIAS, 0), /* - 1.0 */
|
|
SPSTR(0, 3 + SP_EBIAS, 0x200000), /* + 10.0 */
|
|
SPSTR(1, 3 + SP_EBIAS, 0x200000), /* - 10.0 */
|
|
SPSTR(0, SP_EMAX + 1 + SP_EBIAS, 0), /* + infinity */
|
|
SPSTR(1, SP_EMAX + 1 + SP_EBIAS, 0), /* - infinity */
|
|
SPSTR(0, SP_EMAX+1+SP_EBIAS, 0x3FFFFF), /* + indef quiet Nan */
|
|
SPSTR(0, SP_EMAX + SP_EBIAS, 0x7FFFFF), /* + max normal */
|
|
SPSTR(1, SP_EMAX + SP_EBIAS, 0x7FFFFF), /* - max normal */
|
|
SPSTR(0, SP_EMIN + SP_EBIAS, 0), /* + min normal */
|
|
SPSTR(1, SP_EMIN + SP_EBIAS, 0), /* - min normal */
|
|
SPSTR(0, SP_EMIN - 1 + SP_EBIAS, 1), /* + min denormal */
|
|
SPSTR(1, SP_EMIN - 1 + SP_EBIAS, 1), /* - min denormal */
|
|
SPSTR(0, 31 + SP_EBIAS, 0), /* + 1.0e31 */
|
|
SPSTR(0, 63 + SP_EBIAS, 0), /* + 1.0e63 */
|
|
};
|
|
|
|
|
|
int ieee754si_xcpt(int r, const char *op, ...)
|
|
{
|
|
struct ieee754xctx ax;
|
|
|
|
if (!TSTX())
|
|
return r;
|
|
ax.op = op;
|
|
ax.rt = IEEE754_RT_SI;
|
|
ax.rv.si = r;
|
|
va_start(ax.ap, op);
|
|
ieee754_xcpt(&ax);
|
|
va_end(ax.ap);
|
|
return ax.rv.si;
|
|
}
|
|
|
|
s64 ieee754di_xcpt(s64 r, const char *op, ...)
|
|
{
|
|
struct ieee754xctx ax;
|
|
|
|
if (!TSTX())
|
|
return r;
|
|
ax.op = op;
|
|
ax.rt = IEEE754_RT_DI;
|
|
ax.rv.di = r;
|
|
va_start(ax.ap, op);
|
|
ieee754_xcpt(&ax);
|
|
va_end(ax.ap);
|
|
return ax.rv.di;
|
|
}
|