1 /****************************************************************************
3 * GNAT COMPILER COMPONENTS *
9 * Copyright (C) 1992-2009, Free Software Foundation, Inc. *
11 * GNAT is free software; you can redistribute it and/or modify it under *
12 * terms of the GNU General Public License as published by the Free Soft- *
13 * ware Foundation; either version 3, or (at your option) any later ver- *
14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
17 * for more details. You should have received a copy of the GNU General *
18 * Public License distributed with GNAT; see file COPYING3. If not see *
19 * <http://www.gnu.org/licenses/>. *
21 * GNAT was originally developed by the GNAT team at New York University. *
22 * Extensive contributions were provided by Ada Core Technologies Inc. *
24 ****************************************************************************/
26 /* Functions for retrieving target types. See Ada package Get_Targ */
30 #include "coretypes.h"
50 /* If we don't have a specific size for Ada's equivalent of `long', use that
52 #ifndef ADA_LONG_TYPE_SIZE
53 #define ADA_LONG_TYPE_SIZE LONG_TYPE_SIZE
56 #ifndef WIDEST_HARDWARE_FP_SIZE
57 #define WIDEST_HARDWARE_FP_SIZE LONG_DOUBLE_TYPE_SIZE
60 /* The following provide a functional interface for the front end Ada code
61 to determine the sizes that are used for various C types. */
64 get_target_bits_per_unit (void)
70 get_target_bits_per_word (void)
76 get_target_char_size (void)
78 return CHAR_TYPE_SIZE;
82 get_target_wchar_t_size (void)
84 /* We never want wide characters less than "short" in Ada. */
85 return MAX (SHORT_TYPE_SIZE, WCHAR_TYPE_SIZE);
89 get_target_short_size (void)
91 return SHORT_TYPE_SIZE;
95 get_target_int_size (void)
101 get_target_long_size (void)
103 return ADA_LONG_TYPE_SIZE;
107 get_target_long_long_size (void)
109 return LONG_LONG_TYPE_SIZE;
113 get_target_float_size (void)
115 return fp_prec_to_size (FLOAT_TYPE_SIZE);
119 get_target_double_size (void)
121 return fp_prec_to_size (DOUBLE_TYPE_SIZE);
125 get_target_long_double_size (void)
127 return fp_prec_to_size (WIDEST_HARDWARE_FP_SIZE);
131 get_target_pointer_size (void)
136 /* Alignment related values, mapped to attributes for functional and
137 documentation purposes. */
139 /* Standard'Maximum_Default_Alignment. Maximum alignment that the compiler
140 might choose by default for a type or object.
142 Stricter alignment requests trigger gigi's aligning_type circuitry for
143 stack objects or objects allocated by the default allocator. */
146 get_target_maximum_default_alignment (void)
148 return BIGGEST_ALIGNMENT / BITS_PER_UNIT;
151 /* Standard'Default_Allocator_Alignment. Alignment guaranteed to be honored
152 by the default allocator (System.Memory.Alloc or malloc if we have no
153 run-time library at hand).
155 Stricter alignment requests trigger gigi's aligning_type circuitry for
156 objects allocated by the default allocator. */
158 /* ??? Need a way to get info about __gnat_malloc from here (whether it is
159 handy and what alignment it honors). In the meantime, resort to malloc
160 considerations only. */
163 get_target_default_allocator_alignment (void)
165 return MALLOC_ABI_ALIGNMENT / BITS_PER_UNIT;
168 /* Standard'Maximum_Allowed_Alignment. Maximum alignment that we may
169 accept for any type or object. */
171 #ifndef MAX_OFILE_ALIGNMENT
172 #define MAX_OFILE_ALIGNMENT BIGGEST_ALIGNMENT
176 get_target_maximum_allowed_alignment (void)
178 return MAX_OFILE_ALIGNMENT / BITS_PER_UNIT;
181 /* Standard'Maximum_Alignment. The single attribute initially made
182 available, now a synonym of Standard'Maximum_Default_Alignment. */
185 get_target_maximum_alignment (void)
187 return get_target_maximum_default_alignment ();
190 #ifndef FLOAT_WORDS_BIG_ENDIAN
191 #define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
195 get_float_words_be (void)
197 return FLOAT_WORDS_BIG_ENDIAN;
203 return WORDS_BIG_ENDIAN;
209 return BYTES_BIG_ENDIAN;
215 return BITS_BIG_ENDIAN;
219 get_target_strict_alignment (void)
221 return STRICT_ALIGNMENT;
225 get_target_double_float_alignment (void)
227 #ifdef TARGET_ALIGN_NATURAL
228 /* This macro is only defined by the rs6000 port. */
229 if (!TARGET_ALIGN_NATURAL
230 && (DEFAULT_ABI == ABI_AIX || DEFAULT_ABI == ABI_DARWIN))
231 return 32 / BITS_PER_UNIT;
237 get_target_double_scalar_alignment (void)
239 #ifdef TARGET_ALIGN_DOUBLE
240 /* This macro is only defined by the i386 port. */
241 if (!TARGET_ALIGN_DOUBLE && !TARGET_64BIT)
242 return 32 / BITS_PER_UNIT;