Daily bump.
[official-gcc.git] / gcc / sreal.h
blob77cf2c03140744233fb5fbaf65635441bbe2c272
1 /* Definitions for simple data type for positive real numbers.
2 Copyright (C) 2002, 2003 Free Software Foundation, Inc.
4 This file is part of GCC.
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 2, or (at your option) any later
9 version.
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.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING. If not, write to the Free
18 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
19 02110-1301, USA. */
21 #ifndef GCC_SREAL_H
22 #define GCC_SREAL_H
24 /* SREAL_PART_BITS has to be an even number. */
25 #if (HOST_BITS_PER_WIDE_INT / 2) % 2 == 1
26 #define SREAL_PART_BITS (HOST_BITS_PER_WIDE_INT / 2 - 1)
27 #else
28 #define SREAL_PART_BITS (HOST_BITS_PER_WIDE_INT / 2)
29 #endif
31 #define uhwi unsigned HOST_WIDE_INT
32 #define MAX_HOST_WIDE_INT (((uhwi) 1 << (HOST_BITS_PER_WIDE_INT - 1)) - 1)
34 #define SREAL_MIN_SIG ((uhwi) 1 << (SREAL_PART_BITS - 1))
35 #define SREAL_MAX_SIG (((uhwi) 1 << SREAL_PART_BITS) - 1)
36 #define SREAL_MAX_EXP (INT_MAX / 4)
38 #if SREAL_PART_BITS < 32
39 #define SREAL_BITS (SREAL_PART_BITS * 2)
40 #else
41 #define SREAL_BITS SREAL_PART_BITS
42 #endif
44 /* Structure for holding a simple real number. */
45 typedef struct sreal
47 #if SREAL_PART_BITS < 32
48 unsigned HOST_WIDE_INT sig_lo; /* Significant (lower part). */
49 unsigned HOST_WIDE_INT sig_hi; /* Significant (higher part). */
50 #else
51 unsigned HOST_WIDE_INT sig; /* Significant. */
52 #endif
53 signed int exp; /* Exponent. */
54 } sreal;
56 extern void dump_sreal (FILE *, sreal *);
57 extern sreal *sreal_init (sreal *, unsigned HOST_WIDE_INT, signed int);
58 extern HOST_WIDE_INT sreal_to_int (sreal *);
59 extern int sreal_compare (sreal *, sreal *);
60 extern sreal *sreal_add (sreal *, sreal *, sreal *);
61 extern sreal *sreal_sub (sreal *, sreal *, sreal *);
62 extern sreal *sreal_mul (sreal *, sreal *, sreal *);
63 extern sreal *sreal_div (sreal *, sreal *, sreal *);
65 #endif