linux/arch/mips/math-emu/dp_cmp.c
Ralf Baechle 3f7cac416b MIPS: math-emu: Cleanup coding style.
o Only define variables in the outermost block
 o One empty line at most
 o Format comments as per CodingStyle
 o Update FSF address in licensing term comment
 o Spell FPU and MIPS in all capitals.
 o Remove ####-type of lines in comments.
 o Try to make things a bit most consistent between sp_*.c / dp_*.c files.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-23 15:11:15 +02:00

65 lines
1.6 KiB
C

/* IEEE754 floating point arithmetic
* double precision: common utilities
*/
/*
* 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 "ieee754dp.h"
int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cmp, int sig)
{
s64 vx;
s64 vy;
COMPXDP;
COMPYDP;
EXPLODEXDP;
EXPLODEYDP;
FLUSHXDP;
FLUSHYDP;
ieee754_clearcx(); /* Even clear inexact flag here */
if (ieee754dp_isnan(x) || ieee754dp_isnan(y)) {
if (sig || xc == IEEE754_CLASS_SNAN || yc == IEEE754_CLASS_SNAN)
ieee754_setcx(IEEE754_INVALID_OPERATION);
if (cmp & IEEE754_CUN)
return 1;
if (cmp & (IEEE754_CLT | IEEE754_CGT)) {
if (sig && ieee754_setandtestcx(IEEE754_INVALID_OPERATION))
return 0;
}
return 0;
} else {
vx = x.bits;
vy = y.bits;
if (vx < 0)
vx = -vx ^ DP_SIGN_BIT;
if (vy < 0)
vy = -vy ^ DP_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;
}
}