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c9a1084516
We have the input operands already classified in `ieee754sp_cmp' and `ieee754dp_cmp' comparison operations, so use the class obtained to tell NaNs and numbers apart rather than classifying inputs again for this purpose, reducing the size of code by 24 and 40 instructions or 96 and 160 bytes respectively. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9689/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/* IEEE754 floating point arithmetic
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* double precision: common utilities
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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 "ieee754dp.h"
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int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cmp, int sig)
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{
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s64 vx;
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s64 vy;
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COMPXDP;
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COMPYDP;
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EXPLODEXDP;
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EXPLODEYDP;
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FLUSHXDP;
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FLUSHYDP;
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ieee754_clearcx(); /* Even clear inexact flag here */
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if (ieee754_class_nan(xc) || ieee754_class_nan(yc)) {
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if (sig ||
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xc == IEEE754_CLASS_SNAN || yc == IEEE754_CLASS_SNAN)
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ieee754_setcx(IEEE754_INVALID_OPERATION);
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if (cmp & IEEE754_CUN)
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return 1;
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if (cmp & (IEEE754_CLT | IEEE754_CGT)) {
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if (sig && ieee754_setandtestcx(IEEE754_INVALID_OPERATION))
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return 0;
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}
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return 0;
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} else {
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vx = x.bits;
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vy = y.bits;
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if (vx < 0)
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vx = -vx ^ DP_SIGN_BIT;
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if (vy < 0)
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vy = -vy ^ DP_SIGN_BIT;
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if (vx < vy)
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return (cmp & IEEE754_CLT) != 0;
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else if (vx == vy)
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return (cmp & IEEE754_CEQ) != 0;
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else
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return (cmp & IEEE754_CGT) != 0;
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}
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}
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