| /* IEEE754 floating point arithmetic |
| * single precision |
| */ |
| /* |
| * 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., |
| * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| * |
| * ######################################################################## |
| */ |
| |
| |
| #include "ieee754sp.h" |
| |
| int ieee754sp_finite(union ieee754sp x) |
| { |
| return SPBEXP(x) != SP_EMAX + 1 + SP_EBIAS; |
| } |
| |
| union ieee754sp ieee754sp_copysign(union ieee754sp x, union ieee754sp y) |
| { |
| ieee754_clearcx(); |
| SPSIGN(x) = SPSIGN(y); |
| return x; |
| } |
| |
| |
| union ieee754sp ieee754sp_neg(union ieee754sp x) |
| { |
| COMPXSP; |
| |
| EXPLODEXSP; |
| ieee754_clearcx(); |
| FLUSHXSP; |
| |
| /* |
| * Invert the sign ALWAYS to prevent an endless recursion on |
| * pow() in libc. |
| */ |
| /* quick fix up */ |
| SPSIGN(x) ^= 1; |
| |
| if (xc == IEEE754_CLASS_SNAN) { |
| union ieee754sp y = ieee754sp_indef(); |
| ieee754_setcx(IEEE754_INVALID_OPERATION); |
| SPSIGN(y) = SPSIGN(x); |
| return ieee754sp_nanxcpt(y, "neg"); |
| } |
| |
| return x; |
| } |
| |
| |
| union ieee754sp ieee754sp_abs(union ieee754sp x) |
| { |
| COMPXSP; |
| |
| EXPLODEXSP; |
| ieee754_clearcx(); |
| FLUSHXSP; |
| |
| /* Clear sign ALWAYS, irrespective of NaN */ |
| SPSIGN(x) = 0; |
| |
| if (xc == IEEE754_CLASS_SNAN) { |
| ieee754_setcx(IEEE754_INVALID_OPERATION); |
| return ieee754sp_nanxcpt(ieee754sp_indef(), "abs"); |
| } |
| |
| return x; |
| } |