Initial import

1 files changed, 86 insertions, 0 deletions

diff --git a/arch/mips/math-emu/ieee754sp.h b/arch/mips/math-emu/ieee754sp.h
new file mode 100644
index 000000000..374a3f00a
--- /dev/null
+++ b/arch/mips/math-emu/ieee754sp.h
@@ -0,0 +1,86 @@
+/*
+ * IEEE754 floating point
+ * double precision internal header file
+ */
+/*
+ * 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 <linux/compiler.h>
+
+#include "ieee754int.h"
+
+#define assert(expr) ((void)0)
+
+#define SP_EBIAS	127
+#define SP_EMIN		(-126)
+#define SP_EMAX		127
+#define SP_FBITS	23
+#define SP_MBITS	23
+
+#define SP_MBIT(x)	((u32)1 << (x))
+#define SP_HIDDEN_BIT	SP_MBIT(SP_FBITS)
+#define SP_SIGN_BIT	SP_MBIT(31)
+
+#define SPSIGN(sp)	(sp.sign)
+#define SPBEXP(sp)	(sp.bexp)
+#define SPMANT(sp)	(sp.mant)
+
+static inline int ieee754sp_finite(union ieee754sp x)
+{
+	return SPBEXP(x) != SP_EMAX + 1 + SP_EBIAS;
+}
+
+/* 3bit extended single precision sticky right shift */
+#define SPXSRSXn(rs)							\
+	(xe += rs,							\
+	 xm = (rs > (SP_FBITS+3))?1:((xm) >> (rs)) | ((xm) << (32-(rs)) != 0))
+
+#define SPXSRSX1() \
+	(xe++, (xm = (xm >> 1) | (xm & 1)))
+
+#define SPXSRSYn(rs)								\
+	(ye+=rs,								\
+	 ym = (rs > (SP_FBITS+3))?1:((ym) >> (rs)) | ((ym) << (32-(rs)) != 0))
+
+#define SPXSRSY1() \
+	(ye++, (ym = (ym >> 1) | (ym & 1)))
+
+/* convert denormal to normalized with extended exponent */
+#define SPDNORMx(m,e) \
+	while ((m >> SP_FBITS) == 0) { m <<= 1; e--; }
+#define SPDNORMX	SPDNORMx(xm, xe)
+#define SPDNORMY	SPDNORMx(ym, ye)
+
+static inline union ieee754sp buildsp(int s, int bx, unsigned m)
+{
+	union ieee754sp r;
+
+	assert((s) == 0 || (s) == 1);
+	assert((bx) >= SP_EMIN - 1 + SP_EBIAS
+	       && (bx) <= SP_EMAX + 1 + SP_EBIAS);
+	assert(((m) >> SP_FBITS) == 0);
+
+	r.sign = s;
+	r.bexp = bx;
+	r.mant = m;
+
+	return r;
+}
+
+extern union ieee754sp __cold ieee754sp_nanxcpt(union ieee754sp);
+extern union ieee754sp ieee754sp_format(int, int, unsigned);