bd267a5305
Remove a redundant call to `ieee754_setandtestcx' in `ieee754sp_cmp' and `ieee754dp_cmp'. The IEEE 754 exception requested will have already been set by a call to `ieee754_setcx' immediately above, because `sig' has to be non-zero to reach here, and the comparison result returned will be 0 regardless of the result from the call. Simplify the return expression remaining. All this reducing the size of code by 16 and 12 instructions or 64 and 48 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/9690/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
60 lines
1.5 KiB
C
60 lines
1.5 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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return (cmp & IEEE754_CUN) != 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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