patch-2.4.4 linux/arch/mips/math-emu/ieee754int.h

• Lines: 136
• Date: Fri Apr 13 20:26:07 2001
• Orig file: v2.4.3/linux/arch/mips/math-emu/ieee754int.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/arch/mips/math-emu/ieee754int.h linux/arch/mips/math-emu/ieee754int.h
@@ -0,0 +1,135 @@
+/* 
+ * IEEE754 floating point
+ * common internal header file
+ */
+/*
+ * MIPS floating point support
+ * Copyright (C) 1994-2000 Algorithmics Ltd.  All rights reserved.
+ * 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 "ieee754.h"
+
+#define DP_EBIAS	1023
+#define DP_EMIN		(-1022)
+#define DP_EMAX		1023
+#define DP_MBITS	52
+
+#define SP_EBIAS	127
+#define SP_EMIN		(-126)
+#define SP_EMAX		127
+#define SP_MBITS	23
+
+#define DP_MBIT(x)	((unsigned long long)1 << (x))
+#define DP_HIDDEN_BIT	DP_MBIT(DP_MBITS)
+#define DP_SIGN_BIT	DP_MBIT(63)
+
+#define SP_MBIT(x)	((unsigned long)1 << (x))
+#define SP_HIDDEN_BIT	SP_MBIT(SP_MBITS)
+#define SP_SIGN_BIT	SP_MBIT(31)
+
+
+#define SPSIGN(sp)	(sp.parts.sign)
+#define SPBEXP(sp)	(sp.parts.bexp)
+#define SPMANT(sp)	(sp.parts.mant)
+
+#define DPSIGN(dp)	(dp.parts.sign)
+#define DPBEXP(dp)	(dp.parts.bexp)
+#define DPMANT(dp)	(dp.parts.mant)
+
+#define CLPAIR(x,y)	((x)*6+(y))
+
+#define CLEARCX	\
+  (ieee754_csr.cx = 0)
+
+#define SETCX(x) \
+  (ieee754_csr.cx |= (x),ieee754_csr.sx |= (x),ieee754_csr.mx & (x))
+
+#define TSTX()	\
+	(ieee754_csr.cx & ieee754_csr.mx)
+
+
+#define COMPXSP \
+  unsigned xm; int xe; int xs; 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_MBITS-1)) \
+	  vc = IEEE754_CLASS_QNAN;\
+	else \
+	  vc = IEEE754_CLASS_SNAN;\
+    } 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 \
+unsigned long long xm; int xe; int xs; int xc
+
+#define COMPYDP \
+unsigned long long 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_MBITS-1)) \
+	  vc = IEEE754_CLASS_QNAN;\
+	else \
+	  vc = IEEE754_CLASS_SNAN;\
+    } 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)