patch-2.4.4 linux/include/asm-s390/sfp-machine.h

• Lines: 140
• Date: Thu Apr 12 12:16:36 2001
• Orig file: v2.4.3/linux/include/asm-s390/sfp-machine.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/include/asm-s390/sfp-machine.h linux/include/asm-s390/sfp-machine.h
@@ -0,0 +1,139 @@
+/* Machine-dependent software floating-point definitions.
+   S/390 kernel version.
+   Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson (rth@cygnus.com),
+		  Jakub Jelinek (jj@ultra.linux.cz),
+		  David S. Miller (davem@redhat.com) and
+		  Peter Maydell (pmaydell@chiark.greenend.org.uk).
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifndef _SFP_MACHINE_H
+#define _SFP_MACHINE_H
+   
+#include <linux/config.h>
+
+#define _FP_W_TYPE_SIZE		32
+#define _FP_W_TYPE		unsigned long
+#define _FP_WS_TYPE		signed long
+#define _FP_I_TYPE		long
+
+#define _FP_MUL_MEAT_S(R,X,Y)					\
+  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_D(R,X,Y)					\
+  _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y)					\
+  _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y)	_FP_DIV_MEAT_1_udiv(S,R,X,Y)
+#define _FP_DIV_MEAT_D(R,X,Y)	_FP_DIV_MEAT_2_udiv(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y)	_FP_DIV_MEAT_4_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_S		((_FP_QNANBIT_S << 1) - 1)
+#define _FP_NANFRAC_D		((_FP_QNANBIT_D << 1) - 1), -1
+#define _FP_NANFRAC_Q		((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
+#define _FP_NANSIGN_S		0
+#define _FP_NANSIGN_D		0
+#define _FP_NANSIGN_Q		0
+
+#define _FP_KEEPNANFRACP 1
+
+/*
+ * If one NaN is signaling and the other is not,
+ * we choose that one, otherwise we choose X.
+ */
+#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
+  do {                                                          \
+    if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)          \
+        && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))     \
+      {                                                         \
+        R##_s = Y##_s;                                          \
+        _FP_FRAC_COPY_##wc(R,Y);                                \
+      }                                                         \
+    else                                                        \
+      {                                                         \
+        R##_s = X##_s;                                          \
+        _FP_FRAC_COPY_##wc(R,X);                                \
+      }                                                         \
+    R##_c = FP_CLS_NAN;                                         \
+  } while (0)
+
+/* Some assembly to speed things up. */
+#define __FP_FRAC_ADD_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) ({		\
+	unsigned int __r2 = (x2) + (y2);			\
+	unsigned int __r1 = (x1);				\
+	unsigned int __r0 = (x0);				\
+	__asm__ ("   alr %2,%3\n"				\
+		 "   brc 12,0f\n"				\
+		 "   lhi 0,1\n"					\
+		 "   alr %1,0\n"				\
+		 "   brc 12,0f\n"				\
+		 "   alr %0,0\n"				\
+		 "0:"						\
+		 : "+&d" (__r2), "+&d" (__r1), "+&d" (__r0)	\
+		 : "d" (y0), "i" (1) : "cc", "0" );		\
+	__asm__ ("   alr %1,%2\n"				\
+		 "   brc 12,0f\n"				\
+		 "   ahi %0,1\n"				\
+		 "0:"						\
+		 : "+&d" (__r2), "+&d" (__r1)			\
+		 : "d" (y1) : "cc" );				\
+	(r2) = __r2;						\
+	(r1) = __r1;						\
+	(r0) = __r0;						\
+})
+
+#define __FP_FRAC_SUB_3(r2,r1,r0,x2,x1,x0,y2,y1,y0) ({		\
+	unsigned int __r2 = (x2) - (y2);			\
+	unsigned int __r1 = (x1);				\
+	unsigned int __r0 = (x0);				\
+	__asm__ ("   slr %2,%3\n"				\
+		 "   brc 3,0f\n"				\
+		 "   lhi 0,1\n"					\
+		 "   slr %1,0\n"				\
+		 "   brc 3,0f\n"				\
+		 "   slr %0,0\n"				\
+		 "0:"						\
+		 : "+&d" (__r2), "+&d" (__r1), "+&d" (__r0)	\
+		 : "d" (y0) : "cc", "0" );			\
+	__asm__ ("   slr %1,%2\n"				\
+		 "   brc 3,0f\n"				\
+		 "   ahi %0,-1\n"				\
+		 "0:"						\
+		 : "+&d" (__r2), "+&d" (__r1)			\
+		 : "d" (y1) : "cc" );				\
+	(r2) = __r2;						\
+	(r1) = __r1;						\
+	(r0) = __r0;						\
+})
+
+#define __FP_FRAC_DEC_3(x2,x1,x0,y2,y1,y0) __FP_FRAC_SUB_3(x2,x1,x0,x2,x1,x0,y2,y1,y0)
+
+/* Obtain the current rounding mode. */
+#define FP_ROUNDMODE	mode
+
+/* Exception flags. */
+#define FP_EX_INVALID		0x800000
+#define FP_EX_DIVZERO		0x400000
+#define FP_EX_OVERFLOW		0x200000
+#define FP_EX_UNDERFLOW		0x100000
+#define FP_EX_INEXACT		0x080000
+
+/* We write the results always */
+#define FP_INHIBIT_RESULTS 0
+
+#endif