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49 lines
1.3 KiB
49 lines
1.3 KiB
/* 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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union ieee754dp ieee754dp_neg(union ieee754dp x) |
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{ |
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unsigned int oldrm; |
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union ieee754dp y; |
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oldrm = ieee754_csr.rm; |
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ieee754_csr.rm = FPU_CSR_RD; |
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y = ieee754dp_sub(ieee754dp_zero(0), x); |
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ieee754_csr.rm = oldrm; |
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return y; |
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} |
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union ieee754dp ieee754dp_abs(union ieee754dp x) |
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{ |
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unsigned int oldrm; |
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union ieee754dp y; |
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oldrm = ieee754_csr.rm; |
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ieee754_csr.rm = FPU_CSR_RD; |
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if (DPSIGN(x)) |
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y = ieee754dp_sub(ieee754dp_zero(0), x); |
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else |
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y = ieee754dp_add(ieee754dp_zero(0), x); |
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ieee754_csr.rm = oldrm; |
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return y; |
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}
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