From fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineering.com>
Date: Wed, 23 Aug 2017 14:45:25 -0500
Subject: Initial import of modified Linux 2.6.28 tree

Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y
---
 arch/mips/math-emu/dp_simple.c | 90 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 arch/mips/math-emu/dp_simple.c

(limited to 'arch/mips/math-emu/dp_simple.c')

diff --git a/arch/mips/math-emu/dp_simple.c b/arch/mips/math-emu/dp_simple.c
new file mode 100644
index 0000000..1c555e6
--- /dev/null
+++ b/arch/mips/math-emu/dp_simple.c
@@ -0,0 +1,90 @@
+/* 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"
+
+int ieee754dp_finite(ieee754dp x)
+{
+	return DPBEXP(x) != DP_EMAX + 1 + DP_EBIAS;
+}
+
+ieee754dp ieee754dp_copysign(ieee754dp x, ieee754dp y)
+{
+	CLEARCX;
+	DPSIGN(x) = DPSIGN(y);
+	return x;
+}
+
+
+ieee754dp ieee754dp_neg(ieee754dp x)
+{
+	COMPXDP;
+
+	EXPLODEXDP;
+	CLEARCX;
+	FLUSHXDP;
+
+	/*
+	 * Invert the sign ALWAYS to prevent an endless recursion on
+	 * pow() in libc.
+	 */
+	/* quick fix up */
+	DPSIGN(x) ^= 1;
+
+	if (xc == IEEE754_CLASS_SNAN) {
+		ieee754dp y = ieee754dp_indef();
+		SETCX(IEEE754_INVALID_OPERATION);
+		DPSIGN(y) = DPSIGN(x);
+		return ieee754dp_nanxcpt(y, "neg");
+	}
+
+	if (ieee754dp_isnan(x))	/* but not infinity */
+		return ieee754dp_nanxcpt(x, "neg", x);
+	return x;
+}
+
+
+ieee754dp ieee754dp_abs(ieee754dp x)
+{
+	COMPXDP;
+
+	EXPLODEXDP;
+	CLEARCX;
+	FLUSHXDP;
+
+	if (xc == IEEE754_CLASS_SNAN) {
+		SETCX(IEEE754_INVALID_OPERATION);
+		return ieee754dp_nanxcpt(ieee754dp_indef(), "neg");
+	}
+
+	if (ieee754dp_isnan(x))	/* but not infinity */
+		return ieee754dp_nanxcpt(x, "abs", x);
+
+	/* quick fix up */
+	DPSIGN(x) = 0;
+	return x;
+}
-- 
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