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arch/mips/math-emu/sp_frexp.c
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1da177e4c Linux-2.6.12-rc2 |
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/* IEEE754 floating point arithmetic * single precision */ /* * MIPS floating point support * Copyright (C) 1994-2000 Algorithmics Ltd. |
1da177e4c Linux-2.6.12-rc2 |
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* * ######################################################################## * * 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" /* close to ieeep754sp_logb */ ieee754sp ieee754sp_frexp(ieee754sp x, int *eptr) { COMPXSP; CLEARCX; EXPLODEXSP; switch (xc) { case IEEE754_CLASS_SNAN: case IEEE754_CLASS_QNAN: case IEEE754_CLASS_INF: case IEEE754_CLASS_ZERO: *eptr = 0; return x; case IEEE754_CLASS_DNORM: SPDNORMX; break; case IEEE754_CLASS_NORM: break; } *eptr = xe + 1; return buildsp(xs, -1 + SP_EBIAS, xm & ~SP_HIDDEN_BIT); } |