mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
|
/* IEEE754 floating point arithmetic
|
||
|
|
* single precision
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* 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 "ieee754sp.h"
|
||
|
|
|
||
|
|
int ieee754sp_cmp(ieee754sp x, ieee754sp y, int cmp, int sig)
|
||
|
|
{
|
||
|
|
COMPXSP;
|
||
|
|
COMPYSP;
|
||
|
|
|
||
|
|
EXPLODEXSP;
|
||
|
|
EXPLODEYSP;
|
||
|
|
FLUSHXSP;
|
||
|
|
FLUSHYSP;
|
||
|
|
CLEARCX; /* Even clear inexact flag here */
|
||
|
|
|
||
|
|
if (ieee754sp_isnan(x) || ieee754sp_isnan(y)) {
|
||
|
|
if (sig || xc == IEEE754_CLASS_SNAN || yc == IEEE754_CLASS_SNAN)
|
||
|
|
SETCX(IEEE754_INVALID_OPERATION);
|
||
|
|
if (cmp & IEEE754_CUN)
|
||
|
|
return 1;
|
||
|
|
if (cmp & (IEEE754_CLT | IEEE754_CGT)) {
|
||
|
|
if (sig && SETANDTESTCX(IEEE754_INVALID_OPERATION))
|
||
|
|
return ieee754si_xcpt(0, "fcmpf", x);
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
} else {
|
||
|
|
int vx = x.bits;
|
||
|
|
int vy = y.bits;
|
||
|
|
|
||
|
|
if (vx < 0)
|
||
|
|
vx = -vx ^ SP_SIGN_BIT;
|
||
|
|
if (vy < 0)
|
||
|
|
vy = -vy ^ SP_SIGN_BIT;
|
||
|
|
|
||
|
|
if (vx < vy)
|
||
|
|
return (cmp & IEEE754_CLT) != 0;
|
||
|
|
else if (vx == vy)
|
||
|
|
return (cmp & IEEE754_CEQ) != 0;
|
||
|
|
else
|
||
|
|
return (cmp & IEEE754_CGT) != 0;
|
||
|
|
}
|
||
|
|
}
|