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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [mips/] [math-emu/] [dp_logb.c] - Rev 3
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/* IEEE754 floating point arithmetic * double precision: common utilities */ /* * 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 "ieee754dp.h" ieee754dp ieee754dp_logb(ieee754dp x) { COMPXDP; CLEARCX; EXPLODEXDP; switch (xc) { case IEEE754_CLASS_SNAN: return ieee754dp_nanxcpt(x, "logb", x); case IEEE754_CLASS_QNAN: return x; case IEEE754_CLASS_INF: return ieee754dp_inf(0); case IEEE754_CLASS_ZERO: return ieee754dp_inf(1); case IEEE754_CLASS_DNORM: DPDNORMX; break; case IEEE754_CLASS_NORM: break; } return ieee754dp_fint(xe); }