| /* Fixed-point arithmetic support. |
| Copyright (C) 2006-2015 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. */ |
| 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, 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, |
| 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, |
| 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 *, |
| 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 *, 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 *, machine_mode, |
| double_int, bool, bool); |
| |
| /* Convert to a fixed-point mode from a real. */ |
| extern bool fixed_convert_from_real (FIXED_VALUE_TYPE *, 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 *, 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 */ |