diff options
Diffstat (limited to 'kernel/arch/mips/math-emu/sp_simple.c')
| -rw-r--r-- | kernel/arch/mips/math-emu/sp_simple.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/kernel/arch/mips/math-emu/sp_simple.c b/kernel/arch/mips/math-emu/sp_simple.c new file mode 100644 index 000000000..c50e9451f --- /dev/null +++ b/kernel/arch/mips/math-emu/sp_simple.c @@ -0,0 +1,49 @@ +/* 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., + * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "ieee754sp.h" + +union ieee754sp ieee754sp_neg(union ieee754sp x) +{ + unsigned int oldrm; + union ieee754sp y; + + oldrm = ieee754_csr.rm; + ieee754_csr.rm = FPU_CSR_RD; + y = ieee754sp_sub(ieee754sp_zero(0), x); + ieee754_csr.rm = oldrm; + return y; +} + +union ieee754sp ieee754sp_abs(union ieee754sp x) +{ + unsigned int oldrm; + union ieee754sp y; + + oldrm = ieee754_csr.rm; + ieee754_csr.rm = FPU_CSR_RD; + if (SPSIGN(x)) + y = ieee754sp_sub(ieee754sp_zero(0), x); + else + y = ieee754sp_add(ieee754sp_zero(0), x); + ieee754_csr.rm = oldrm; + return y; +} |