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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/mips/math-emu/ieee754int.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/mips/math-emu/ieee754int.h')
-rw-r--r--kernel/arch/mips/math-emu/ieee754int.h146
1 files changed, 146 insertions, 0 deletions
diff --git a/kernel/arch/mips/math-emu/ieee754int.h b/kernel/arch/mips/math-emu/ieee754int.h
new file mode 100644
index 000000000..05389d5e3
--- /dev/null
+++ b/kernel/arch/mips/math-emu/ieee754int.h
@@ -0,0 +1,146 @@
+/*
+ * IEEE754 floating point
+ * common 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.
+ */
+#ifndef __IEEE754INT_H
+#define __IEEE754INT_H
+
+#include "ieee754.h"
+
+#define CLPAIR(x, y) ((x)*6+(y))
+
+static inline void ieee754_clearcx(void)
+{
+ ieee754_csr.cx = 0;
+}
+
+static inline void ieee754_setcx(const unsigned int flags)
+{
+ ieee754_csr.cx |= flags;
+ ieee754_csr.sx |= flags;
+}
+
+static inline int ieee754_setandtestcx(const unsigned int x)
+{
+ ieee754_setcx(x);
+
+ return ieee754_csr.mx & x;
+}
+
+static inline int ieee754_class_nan(int xc)
+{
+ return xc >= IEEE754_CLASS_SNAN;
+}
+
+#define COMPXSP \
+ unsigned xm; int xe; int xs __maybe_unused; int xc
+
+#define COMPYSP \
+ unsigned ym; int ye; int ys; int yc
+
+#define EXPLODESP(v, vc, vs, ve, vm) \
+{ \
+ vs = SPSIGN(v); \
+ ve = SPBEXP(v); \
+ vm = SPMANT(v); \
+ if (ve == SP_EMAX+1+SP_EBIAS) { \
+ if (vm == 0) \
+ vc = IEEE754_CLASS_INF; \
+ else if (vm & SP_MBIT(SP_FBITS-1)) \
+ vc = IEEE754_CLASS_SNAN; \
+ else \
+ vc = IEEE754_CLASS_QNAN; \
+ } else if (ve == SP_EMIN-1+SP_EBIAS) { \
+ if (vm) { \
+ ve = SP_EMIN; \
+ vc = IEEE754_CLASS_DNORM; \
+ } else \
+ vc = IEEE754_CLASS_ZERO; \
+ } else { \
+ ve -= SP_EBIAS; \
+ vm |= SP_HIDDEN_BIT; \
+ vc = IEEE754_CLASS_NORM; \
+ } \
+}
+#define EXPLODEXSP EXPLODESP(x, xc, xs, xe, xm)
+#define EXPLODEYSP EXPLODESP(y, yc, ys, ye, ym)
+
+
+#define COMPXDP \
+ u64 xm; int xe; int xs __maybe_unused; int xc
+
+#define COMPYDP \
+ u64 ym; int ye; int ys; int yc
+
+#define EXPLODEDP(v, vc, vs, ve, vm) \
+{ \
+ vm = DPMANT(v); \
+ vs = DPSIGN(v); \
+ ve = DPBEXP(v); \
+ if (ve == DP_EMAX+1+DP_EBIAS) { \
+ if (vm == 0) \
+ vc = IEEE754_CLASS_INF; \
+ else if (vm & DP_MBIT(DP_FBITS-1)) \
+ vc = IEEE754_CLASS_SNAN; \
+ else \
+ vc = IEEE754_CLASS_QNAN; \
+ } else if (ve == DP_EMIN-1+DP_EBIAS) { \
+ if (vm) { \
+ ve = DP_EMIN; \
+ vc = IEEE754_CLASS_DNORM; \
+ } else \
+ vc = IEEE754_CLASS_ZERO; \
+ } else { \
+ ve -= DP_EBIAS; \
+ vm |= DP_HIDDEN_BIT; \
+ vc = IEEE754_CLASS_NORM; \
+ } \
+}
+#define EXPLODEXDP EXPLODEDP(x, xc, xs, xe, xm)
+#define EXPLODEYDP EXPLODEDP(y, yc, ys, ye, ym)
+
+#define FLUSHDP(v, vc, vs, ve, vm) \
+ if (vc==IEEE754_CLASS_DNORM) { \
+ if (ieee754_csr.nod) { \
+ ieee754_setcx(IEEE754_INEXACT); \
+ vc = IEEE754_CLASS_ZERO; \
+ ve = DP_EMIN-1+DP_EBIAS; \
+ vm = 0; \
+ v = ieee754dp_zero(vs); \
+ } \
+ }
+
+#define FLUSHSP(v, vc, vs, ve, vm) \
+ if (vc==IEEE754_CLASS_DNORM) { \
+ if (ieee754_csr.nod) { \
+ ieee754_setcx(IEEE754_INEXACT); \
+ vc = IEEE754_CLASS_ZERO; \
+ ve = SP_EMIN-1+SP_EBIAS; \
+ vm = 0; \
+ v = ieee754sp_zero(vs); \
+ } \
+ }
+
+#define FLUSHXDP FLUSHDP(x, xc, xs, xe, xm)
+#define FLUSHYDP FLUSHDP(y, yc, ys, ye, ym)
+#define FLUSHXSP FLUSHSP(x, xc, xs, xe, xm)
+#define FLUSHYSP FLUSHSP(y, yc, ys, ye, ym)
+
+#endif /* __IEEE754INT_H */