Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / mips / math-emu / dp_simple.c

diff --git a/kernel/arch/mips/math-emu/dp_simple.c b/kernel/arch/mips/math-emu/dp_simple.c
new file mode 100644 (file)
index 0000000..926d56b
--- /dev/null
+++ b/kernel/arch/mips/math-emu/dp_simple.c
@@ -0,0 +1,49 @@
+/* IEEE754 floating point arithmetic
+ * double precision: common utilities
+ */
+/*
+ * 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 "ieee754dp.h"
+
+union ieee754dp ieee754dp_neg(union ieee754dp x)
+{
+       unsigned int oldrm;
+       union ieee754dp y;
+
+       oldrm = ieee754_csr.rm;
+       ieee754_csr.rm = FPU_CSR_RD;
+       y = ieee754dp_sub(ieee754dp_zero(0), x);
+       ieee754_csr.rm = oldrm;
+       return y;
+}
+
+union ieee754dp ieee754dp_abs(union ieee754dp x)
+{
+       unsigned int oldrm;
+       union ieee754dp y;
+
+       oldrm = ieee754_csr.rm;
+       ieee754_csr.rm = FPU_CSR_RD;
+       if (DPSIGN(x))
+               y = ieee754dp_sub(ieee754dp_zero(0), x);
+       else
+               y = ieee754dp_add(ieee754dp_zero(0), x);
+       ieee754_csr.rm = oldrm;
+       return y;
+}