1 files changed, 74 insertions, 0 deletions

diff --git a/arch/mips/math-emu/dp_fsp.c b/arch/mips/math-emu/dp_fsp.c
new file mode 100644
index 000000000000..494d19ac7049
--- /dev/null
+++ b/arch/mips/math-emu/dp_fsp.c
@@ -0,0 +1,74 @@
+/* IEEE754 floating point arithmetic
+ * double precision: common utilities
+ */
+/*
+ * MIPS floating point support
+ * Copyright (C) 1994-2000 Algorithmics Ltd.
+ * http://www.algor.co.uk
+ *
+ * ########################################################################
+ *
+ *  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 "ieee754dp.h"
+
+ieee754dp ieee754dp_fsp(ieee754sp x)
+{
+        COMPXSP;
+
+        EXPLODEXSP;
+
+        CLEARCX;
+
+        FLUSHXSP;
+
+        switch (xc) {
+        case IEEE754_CLASS_SNAN:
+                SETCX(IEEE754_INVALID_OPERATION);
+                return ieee754dp_nanxcpt(ieee754dp_indef(), "fsp");
+        case IEEE754_CLASS_QNAN:
+                return ieee754dp_nanxcpt(builddp(xs,
+                                                 DP_EMAX + 1 + DP_EBIAS,
+                                                 ((u64) xm
+                                                  << (DP_MBITS -
+                                                      SP_MBITS))), "fsp",
+                                         x);
+        case IEEE754_CLASS_INF:
+                return ieee754dp_inf(xs);
+        case IEEE754_CLASS_ZERO:
+                return ieee754dp_zero(xs);
+        case IEEE754_CLASS_DNORM:
+                /* normalize */
+                while ((xm >> SP_MBITS) == 0) {
+                        xm <<= 1;
+                        xe--;
+                }
+                break;
+        case IEEE754_CLASS_NORM:
+                break;
+        }
+
+        /* CANT possibly overflow,underflow, or need rounding
+         */
+
+        /* drop the hidden bit */
+        xm &= ~SP_HIDDEN_BIT;
+
+        return builddp(xs, xe + DP_EBIAS,
+                       (u64) xm << (DP_MBITS - SP_MBITS));
+}