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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [fixed-value.h] - Rev 696
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/* Fixed-point arithmetic support. Copyright (C) 2006, 2007, 2009 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); /* 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 */
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