[thirdparty/gcc.git] / gcc / fixed-value.h

/* 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

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 */
Commit	Line	Data
5efd9b45	1	/* Fixed-point arithmetic support.
d353bf18	2	Copyright (C) 2006-2015 Free Software Foundation, Inc.
5efd9b45	3
	4	This file is part of GCC.
	5
	6	GCC is free software; you can redistribute it and/or modify it under
	7	the terms of the GNU General Public License as published by the Free
	8	Software Foundation; either version 3, or (at your option) any later
	9	version.
	10
	11	GCC is distributed in the hope that it will be useful, but WITHOUT ANY
	12	WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	14	for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GCC; see the file COPYING3. If not see
	18	<http://www.gnu.org/licenses/>. */
	19
	20	#ifndef GCC_FIXED_VALUE_H
	21	#define GCC_FIXED_VALUE_H
	22
fb1e4f4a	23	struct GTY(()) fixed_value
5efd9b45	24	{
b9c74b4d	25	double_int data; /* Store data up to 2 wide integers. */
3754d046	26	machine_mode mode; /* Use machine mode to know IBIT and FBIT. */
5efd9b45	27	};
	28
	29	#define FIXED_VALUE_TYPE struct fixed_value
	30
	31	#define MAX_FCONST0 18 /* For storing 18 fixed-point zeros per
	32	fract, ufract, accum, and uaccum modes . */
	33	#define MAX_FCONST1 8 /* For storing 8 fixed-point ones per accum
	34	and uaccum modes. */
	35	/* Constant fixed-point values 0 and 1. */
	36	extern FIXED_VALUE_TYPE fconst0[MAX_FCONST0];
	37	extern FIXED_VALUE_TYPE fconst1[MAX_FCONST1];
	38
	39	/* Macros to access fconst0 and fconst1 via machine modes. */
	40	#define FCONST0(mode) fconst0[mode - QQmode]
	41	#define FCONST1(mode) fconst1[mode - HAmode]
	42
	43	/* Return a CONST_FIXED with value R and mode M. */
	44	#define CONST_FIXED_FROM_FIXED_VALUE(r, m) \
	45	const_fixed_from_fixed_value (r, m)
3754d046	46	extern rtx const_fixed_from_fixed_value (FIXED_VALUE_TYPE, machine_mode);
5efd9b45	47
52cd005d	48	/* Construct a FIXED_VALUE from a bit payload and machine mode MODE.
992b7387	49	The bits in PAYLOAD are sign-extended/zero-extended according to MODE. */
52cd005d	50	extern FIXED_VALUE_TYPE fixed_from_double_int (double_int,
3754d046	51	machine_mode);
52cd005d	52
52cd005d	53	/* Return a CONST_FIXED from a bit payload and machine mode MODE.
992b7387	54	The bits in PAYLOAD are sign-extended/zero-extended according to MODE. */
52cd005d	55	static inline rtx
52cd005d	56	const_fixed_from_double_int (double_int payload,
3754d046	57	machine_mode mode)
52cd005d	58	{
	59	return
	60	const_fixed_from_fixed_value (fixed_from_double_int (payload, mode),
	61	mode);
	62	}
	63
5efd9b45	64	/* Initialize from a decimal or hexadecimal string. */
5efd9b45	65	extern void fixed_from_string (FIXED_VALUE_TYPE , const char ,
3754d046	66	machine_mode);
5efd9b45	67
	68	/* In tree.c: wrap up a FIXED_VALUE_TYPE in a tree node. */
	69	extern tree build_fixed (tree, FIXED_VALUE_TYPE);
	70
	71	/* Extend or truncate to a new mode. */
3754d046	72	extern bool fixed_convert (FIXED_VALUE_TYPE *, machine_mode,
5efd9b45	73	const FIXED_VALUE_TYPE *, bool);
	74
	75	/* Convert to a fixed-point mode from an integer. */
3754d046	76	extern bool fixed_convert_from_int (FIXED_VALUE_TYPE *, machine_mode,
5efd9b45	77	double_int, bool, bool);
	78
	79	/* Convert to a fixed-point mode from a real. */
3754d046	80	extern bool fixed_convert_from_real (FIXED_VALUE_TYPE *, machine_mode,
5efd9b45	81	const REAL_VALUE_TYPE *, bool);
	82
	83	/* Convert to a real mode from a fixed-point. */
3754d046	84	extern void real_convert_from_fixed (REAL_VALUE_TYPE *, machine_mode,
5efd9b45	85	const FIXED_VALUE_TYPE *);
	86
	87	/* Compare two fixed-point objects for bitwise identity. */
	88	extern bool fixed_identical (const FIXED_VALUE_TYPE , const FIXED_VALUE_TYPE );
	89
	90	/* Calculate a hash value. */
	91	extern unsigned int fixed_hash (const FIXED_VALUE_TYPE *);
	92
	93	#define FIXED_VALUES_IDENTICAL(x, y) fixed_identical (&(x), &(y))
	94
	95	/* Determine whether a fixed-point value X is negative. */
	96	#define FIXED_VALUE_NEGATIVE(x) fixed_isneg (&(x))
	97
	98	/* Render F as a decimal floating point constant. */
	99	extern void fixed_to_decimal (char str, const FIXED_VALUE_TYPE , size_t);
	100
	101	/* Binary or unary arithmetic on tree_code. */
	102	extern bool fixed_arithmetic (FIXED_VALUE_TYPE , int, const FIXED_VALUE_TYPE ,
	103	const FIXED_VALUE_TYPE *, bool);
	104
	105	/* Compare fixed-point values by tree_code. */
	106	extern bool fixed_compare (int, const FIXED_VALUE_TYPE *,
	107	const FIXED_VALUE_TYPE *);
	108
	109	/* Determine whether a fixed-point value X is negative. */
	110	extern bool fixed_isneg (const FIXED_VALUE_TYPE *);
	111
	112	#endif /* GCC_FIXED_VALUE_H */