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authorBen Cheng <bccheng@google.com>2014-03-26 05:37:19 (GMT)
committerBen Cheng <bccheng@google.com>2014-03-26 05:37:19 (GMT)
commit1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch)
treec607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/fixed-value.h
parent283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff)
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Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/fixed-value.h')
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+/* Fixed-point arithmetic support.
+ Copyright (C) 2006-2014 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 GTY(()) fixed_value
+{
+ double_int data; /* Store data up to 2 wide integers. */
+ enum machine_mode 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);
+
+/* Construct a FIXED_VALUE from a bit payload and machine mode MODE.
+ The bits in PAYLOAD are sign-extended/zero-extended according to MODE. */
+extern FIXED_VALUE_TYPE fixed_from_double_int (double_int,
+ enum machine_mode);
+
+/* Return a CONST_FIXED from a bit payload and machine mode MODE.
+ The bits in PAYLOAD are sign-extended/zero-extended according to MODE. */
+static inline rtx
+const_fixed_from_double_int (double_int payload,
+ enum machine_mode mode)
+{
+ return
+ const_fixed_from_fixed_value (fixed_from_double_int (payload, mode),
+ 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 */