GCC Middle and Back End API Reference
dfp.h
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1 /* Decimal floating point support functions for GNU compiler.
2  Copyright (C) 2005-2013 Free Software Foundation, Inc.
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_DFP_H
21 #define GCC_DFP_H
22 
23 /* Encode REAL_VALUE_TYPEs into 32/64/128-bit IEEE 754 encoded values. */
24 void encode_decimal32 (const struct real_format *fmt, long *, const REAL_VALUE_TYPE *);
25 void encode_decimal64 (const struct real_format *fmt, long *, const REAL_VALUE_TYPE *);
26 void decode_decimal128 (const struct real_format *, REAL_VALUE_TYPE *, const long *);
27 
28 /* Decode 32/64/128-bit IEEE 754 encoded values into REAL_VALUE_TYPEs. */
29 void decode_decimal32 (const struct real_format *, REAL_VALUE_TYPE *, const long *);
30 void decode_decimal64 (const struct real_format *, REAL_VALUE_TYPE *, const long *);
31 void encode_decimal128 (const struct real_format *fmt, long *, const REAL_VALUE_TYPE *);
32 
33 /* Arithmetic and conversion functions. */
34 int decimal_do_compare (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *, int);
35 void decimal_real_from_string (REAL_VALUE_TYPE *, const char *);
36 void decimal_round_for_format (const struct real_format *, REAL_VALUE_TYPE *);
37 void decimal_real_convert (REAL_VALUE_TYPE *, enum machine_mode, const REAL_VALUE_TYPE *);
38 void decimal_real_to_decimal (char *, const REAL_VALUE_TYPE *, size_t, size_t, int);
39 void decimal_do_fix_trunc (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
40 void decimal_real_maxval (REAL_VALUE_TYPE *, int, enum machine_mode);
41 void decimal_real_to_integer2 (HOST_WIDE_INT *, HOST_WIDE_INT *, const REAL_VALUE_TYPE *);
42 HOST_WIDE_INT decimal_real_to_integer (const REAL_VALUE_TYPE *);
43 
44 #ifdef TREE_CODE
45 bool decimal_real_arithmetic (REAL_VALUE_TYPE *, enum tree_code, const REAL_VALUE_TYPE *,
46  const REAL_VALUE_TYPE *);
47 #endif
48 
49 #endif /* GCC_DFP_H */