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Diffstat (limited to 'gcc-4.9/gcc/fixed-value.h')
| -rw-r--r-- | gcc-4.9/gcc/fixed-value.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/fixed-value.h b/gcc-4.9/gcc/fixed-value.h new file mode 100644 index 000000000..f183eab0c --- /dev/null +++ b/gcc-4.9/gcc/fixed-value.h @@ -0,0 +1,116 @@ +/* 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 */ |