1 /* IEEE754 floating point arithmetic 2 * double precision: common utilities 3 */ 4 /* 5 * MIPS floating point support 6 * Copyright (C) 1994-2000 Algorithmics Ltd. 7 * 8 * This program is free software; you can distribute it and/or modify it 9 * under the terms of the GNU General Public License (Version 2) as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 * for more details. 16 * 17 * You should have received a copy of the GNU General Public License along 18 * with this program; if not, write to the Free Software Foundation, Inc., 19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 */ 21 22 #include "ieee754dp.h" 23 24 union ieee754dp ieee754dp_neg(union ieee754dp x) 25 { 26 unsigned int oldrm; 27 union ieee754dp y; 28 29 oldrm = ieee754_csr.rm; 30 ieee754_csr.rm = FPU_CSR_RD; 31 y = ieee754dp_sub(ieee754dp_zero(0), x); 32 ieee754_csr.rm = oldrm; 33 return y; 34 } 35 36 union ieee754dp ieee754dp_abs(union ieee754dp x) 37 { 38 unsigned int oldrm; 39 union ieee754dp y; 40 41 oldrm = ieee754_csr.rm; 42 ieee754_csr.rm = FPU_CSR_RD; 43 if (DPSIGN(x)) 44 y = ieee754dp_sub(ieee754dp_zero(0), x); 45 else 46 y = ieee754dp_add(ieee754dp_zero(0), x); 47 ieee754_csr.rm = oldrm; 48 return y; 49 } 50