patch-2.3.4 linux/arch/sparc64/math-emu/soft-fp.h

• Lines: 178
• Date: Sat May 29 11:09:04 1999
• Orig file: v2.3.3/linux/arch/sparc64/math-emu/soft-fp.h
• Orig date: Wed Mar 10 16:53:37 1999

diff -u --recursive --new-file v2.3.3/linux/arch/sparc64/math-emu/soft-fp.h linux/arch/sparc64/math-emu/soft-fp.h
@@ -1,8 +1,36 @@
+/* Software floating-point emulation.
+   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 SOFT_FP_H
 #define SOFT_FP_H
 
 #include "sfp-machine.h"
 
+/* Allow sfp-machine to have its own byte order definitions. */
+#ifndef __BYTE_ORDER
+#include <endian.h>
+#endif
+
 #define _FP_WORKBITS		3
 #define _FP_WORK_LSB		((_FP_W_TYPE)1 << 3)
 #define _FP_WORK_ROUND		((_FP_W_TYPE)1 << 2)
@@ -19,51 +47,100 @@
 #endif
 #endif
 
+/* By default don't care about exceptions. */
+#ifndef FP_EX_INVALID
+#define FP_EX_INVALID		0
+#endif
+#ifndef FP_EX_OVERFLOW
+#define FP_EX_OVERFLOW		0
+#endif
+#ifndef FP_EX_UNDERFLOW
+#define FP_EX_UNDERFLOW		
+#endif
+#ifndef FP_EX_DIVZERO
+#define FP_EX_DIVZERO		0
+#endif
+#ifndef FP_EX_INEXACT
+#define FP_EX_INEXACT		0
+#endif
+#ifndef FP_EX_DENORM
+#define FP_EX_DENORM		0
+#endif
+
+#ifdef _FP_DECL_EX
+#define FP_DECL_EX					\
+  int _fex = 0;						\
+  _FP_DECL_EX
+#else
+#define FP_DECL_EX int _fex = 0
+#endif
+  
+#ifndef FP_INIT_ROUNDMODE
+#define FP_INIT_ROUNDMODE do {} while (0)
+#endif
+
+#ifndef FP_HANDLE_EXCEPTIONS
+#define FP_HANDLE_EXCEPTIONS do {} while (0)
+#endif
+
+#ifndef FP_INHIBIT_RESULTS
+/* By default we write the results always.
+ * sfp-machine may override this and e.g.
+ * check if some exceptions are unmasked
+ * and inhibit it in such a case.
+ */
+#define FP_INHIBIT_RESULTS 0
+#endif
+
+#define FP_SET_EXCEPTION(ex)				\
+  _fex |= (ex)
+  
+#define FP_UNSET_EXCEPTION(ex)				\
+  _fex &= ~(ex)
+
+#define FP_CLEAR_EXCEPTIONS				\
+  _fex = 0
+
 #define _FP_ROUND_NEAREST(wc, X)			\
-({  int __ret = EFLAG_INEXACT;				\
+do {							\
     if ((_FP_FRAC_LOW_##wc(X) & 15) != _FP_WORK_ROUND)	\
       _FP_FRAC_ADDI_##wc(X, _FP_WORK_ROUND);		\
-    else __ret = 0;					\
-    __ret;						\
-})
+} while (0)
 
-#define _FP_ROUND_ZERO(wc, X)		0 /* XXX */
+#define _FP_ROUND_ZERO(wc, X)		0
 
 #define _FP_ROUND_PINF(wc, X)				\
-({  int __ret = EFLAG_INEXACT;				\
+do {							\
     if (!X##_s && (_FP_FRAC_LOW_##wc(X) & 7))		\
       _FP_FRAC_ADDI_##wc(X, _FP_WORK_LSB);		\
-    else __ret = 0;					\
-    __ret;						\
-})
+} while (0)
 
 #define _FP_ROUND_MINF(wc, X)				\
-({  int __ret = EFLAG_INEXACT;				\
+do {							\
     if (X##_s && (_FP_FRAC_LOW_##wc(X) & 7))		\
       _FP_FRAC_ADDI_##wc(X, _FP_WORK_LSB);		\
-    else __ret = 0;					\
-    __ret;						\
-})
+} while (0)
 
 #define _FP_ROUND(wc, X)			\
-({	int __ret = 0;				\
+do {						\
+	if (_FP_FRAC_LOW_##wc(X) & 7)		\
+	  FP_SET_EXCEPTION(FP_EX_INEXACT);	\
 	switch (FP_ROUNDMODE)			\
 	{					\
 	  case FP_RND_NEAREST:			\
-	    __ret |= _FP_ROUND_NEAREST(wc,X);	\
+	    _FP_ROUND_NEAREST(wc,X);		\
 	    break;				\
 	  case FP_RND_ZERO:			\
-	    __ret |= _FP_ROUND_ZERO(wc,X);	\
+	    _FP_ROUND_ZERO(wc,X);		\
 	    break;				\
 	  case FP_RND_PINF:			\
-	    __ret |= _FP_ROUND_PINF(wc,X);	\
+	    _FP_ROUND_PINF(wc,X);		\
 	    break;				\
 	  case FP_RND_MINF:			\
-	    __ret |= _FP_ROUND_MINF(wc,X);	\
+	    _FP_ROUND_MINF(wc,X);		\
 	    break;				\
-	};					\
-	__ret;					\
-})
+	}					\
+} while (0)
 
 #define FP_CLS_NORMAL		0
 #define FP_CLS_ZERO		1
@@ -75,6 +152,7 @@
 #include "op-1.h"
 #include "op-2.h"
 #include "op-4.h"
+#include "op-8.h"
 #include "op-common.h"
 
 /* Sigh.  Silly things longlong.h needs.  */
@@ -89,6 +167,10 @@
 typedef unsigned int UHWtype __attribute__((mode(HI)));
 #elif _FP_W_TYPE_SIZE == 64
 typedef USItype UHWtype;
+#endif
+
+#ifndef umul_ppmm
+#include <stdlib/longlong.h>
 #endif
 
 #endif