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-rw-r--r--arch/mips/math-emu/sp_fint.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/arch/mips/math-emu/sp_fint.c b/arch/mips/math-emu/sp_fint.c
new file mode 100644
index 00000000000..42d9ed4b9a9
--- /dev/null
+++ b/arch/mips/math-emu/sp_fint.c
@@ -0,0 +1,80 @@
+/* IEEE754 floating point arithmetic
+ * single precision
+ */
+/*
+ * 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 "ieee754sp.h"
+
+ieee754sp ieee754sp_fint(int x)
+{
+ COMPXSP;
+
+ CLEARCX;
+
+ xc = ( 0 ? xc : xc );
+
+ if (x == 0)
+ return ieee754sp_zero(0);
+ if (x == 1 || x == -1)
+ return ieee754sp_one(x < 0);
+ if (x == 10 || x == -10)
+ return ieee754sp_ten(x < 0);
+
+ xs = (x < 0);
+ if (xs) {
+ if (x == (1 << 31))
+ xm = ((unsigned) 1 << 31); /* max neg can't be safely negated */
+ else
+ xm = -x;
+ } else {
+ xm = x;
+ }
+ xe = SP_MBITS + 3;
+
+ if (xm >> (SP_MBITS + 1 + 3)) {
+ /* shunt out overflow bits
+ */
+ while (xm >> (SP_MBITS + 1 + 3)) {
+ SPXSRSX1();
+ }
+ } else {
+ /* normalize in grs extended single precision
+ */
+ while ((xm >> (SP_MBITS + 3)) == 0) {
+ xm <<= 1;
+ xe--;
+ }
+ }
+ SPNORMRET1(xs, xe, xm, "fint", x);
+}
+
+
+ieee754sp ieee754sp_funs(unsigned int u)
+{
+ if ((int) u < 0)
+ return ieee754sp_add(ieee754sp_1e31(),
+ ieee754sp_fint(u & ~(1 << 31)));
+ return ieee754sp_fint(u);
+}