* fixed-value.h: New file.

	* fixed-value.c: New file.
	* Makefile.in (OBJS-common): Add fixed-value.o.
	(fixed-value.o): New rule.
	(GTFILES): Add fixed-value.h.
	* double-int.c (double_int_scmp): We should use unsigned HOST_WIDE_INT
	to compare a.low and b.low.
	* gengtype.c (main): Handle FIXED_VALUE_TYPE type as scalar typedef.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@127260 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 100 insertions, 0 deletions

diff --git a/gcc/fixed-value.h b/gcc/fixed-value.h
new file mode 100644
index 00000000000..69db190e8f1
--- /dev/null
+++ b/gcc/fixed-value.h
@@ -0,0 +1,100 @@
+/* Fixed-point arithmetic support.
+   Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef GCC_FIXED_VALUE_H
+#define GCC_FIXED_VALUE_H
+
+#include "machmode.h"
+#include "real.h"
+#include "double-int.h"
+
+struct fixed_value GTY(())
+{
+  double_int data;	/* Store data up to 2 wide integers.  */
+  unsigned int mode;	/* Use machine mode to know IBIT and FBIT.  */
+};
+
+#define FIXED_VALUE_TYPE struct fixed_value
+
+#define MAX_FCONST0	18	/* For storing 18 fixed-point zeros per
+				   fract, ufract, accum, and uaccum modes .  */
+#define MAX_FCONST1	8	/* For storing 8 fixed-point ones per accum
+				   and uaccum modes.  */
+/* Constant fixed-point values 0 and 1.  */
+extern FIXED_VALUE_TYPE fconst0[MAX_FCONST0];
+extern FIXED_VALUE_TYPE fconst1[MAX_FCONST1];
+
+/* Macros to access fconst0 and fconst1 via machine modes.  */
+#define FCONST0(mode)	fconst0[mode - QQmode]
+#define FCONST1(mode)	fconst1[mode - HAmode]
+
+/* Return a CONST_FIXED with value R and mode M.  */
+#define CONST_FIXED_FROM_FIXED_VALUE(r, m) \
+  const_fixed_from_fixed_value (r, m)
+extern rtx const_fixed_from_fixed_value (FIXED_VALUE_TYPE, enum machine_mode);
+
+/* Initialize from a decimal or hexadecimal string.  */
+extern void fixed_from_string (FIXED_VALUE_TYPE *, const char *,
+			       enum machine_mode);
+
+/* In tree.c: wrap up a FIXED_VALUE_TYPE in a tree node.  */
+extern tree build_fixed (tree, FIXED_VALUE_TYPE);
+
+/* Extend or truncate to a new mode.  */
+extern bool fixed_convert (FIXED_VALUE_TYPE *, enum machine_mode,
+			   const FIXED_VALUE_TYPE *, bool);
+
+/* Convert to a fixed-point mode from an integer.  */
+extern bool fixed_convert_from_int (FIXED_VALUE_TYPE *, enum machine_mode,
+				    double_int, bool, bool);
+
+/* Convert to a fixed-point mode from a real.  */
+extern bool fixed_convert_from_real (FIXED_VALUE_TYPE *, enum machine_mode,
+				     const REAL_VALUE_TYPE *, bool);
+
+/* Convert to a real mode from a fixed-point.  */
+extern void real_convert_from_fixed (REAL_VALUE_TYPE *, enum machine_mode,
+				     const FIXED_VALUE_TYPE *);
+
+/* Compare two fixed-point objects for bitwise identity.  */
+extern bool fixed_identical (const FIXED_VALUE_TYPE *, const FIXED_VALUE_TYPE *);
+
+/* Calculate a hash value.  */
+extern unsigned int fixed_hash (const FIXED_VALUE_TYPE *);
+
+#define FIXED_VALUES_IDENTICAL(x, y)	fixed_identical (&(x), &(y))
+
+/* Determine whether a fixed-point value X is negative.  */
+#define FIXED_VALUE_NEGATIVE(x)		fixed_isneg (&(x))
+
+/* Render F as a decimal floating point constant.  */
+extern void fixed_to_decimal (char *str, const FIXED_VALUE_TYPE *, size_t);
+
+/* Binary or unary arithmetic on tree_code.  */
+extern bool fixed_arithmetic (FIXED_VALUE_TYPE *, int, const FIXED_VALUE_TYPE *,
+			      const FIXED_VALUE_TYPE *, bool);
+
+/* Compare fixed-point values by tree_code.  */
+extern bool fixed_compare (int, const FIXED_VALUE_TYPE *,
+			   const FIXED_VALUE_TYPE *);
+
+/* Determine whether a fixed-point value X is negative.  */
+extern bool fixed_isneg (const FIXED_VALUE_TYPE *);
+
+#endif /* GCC_FIXED_VALUE_H */