File : get_targ.adb
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT COMPILER COMPONENTS --
4 -- --
5 -- G E T _ T A R G --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2015, Free Software Foundation, Inc. --
10 -- --
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, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
20 -- --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
23 -- --
24 ------------------------------------------------------------------------------
25
26 -- Version for use with GCC
27
28 package body Get_Targ is
29
30 -- Functions returning individual run-time values. For the standard (GCC)
31 -- back end, these come from C interface functions (one for each value).
32
33 -----------------------
34 -- Get_Bits_Per_Unit --
35 -----------------------
36
37 function Get_Bits_Per_Unit return Pos is
38 function C_Get_Bits_Per_Unit return Pos;
39 pragma Import (C, C_Get_Bits_Per_Unit,
40 "get_target_bits_per_unit");
41 begin
42 return C_Get_Bits_Per_Unit;
43 end Get_Bits_Per_Unit;
44
45 -----------------------
46 -- Get_Bits_Per_Word --
47 -----------------------
48
49 function Get_Bits_Per_Word return Pos is
50 function C_Get_Bits_Per_Word return Pos;
51 pragma Import (C, C_Get_Bits_Per_Word,
52 "get_target_bits_per_word");
53 begin
54 return C_Get_Bits_Per_Word;
55 end Get_Bits_Per_Word;
56
57 -------------------
58 -- Get_Char_Size --
59 -------------------
60
61 function Get_Char_Size return Pos is
62 function C_Get_Char_Size return Pos;
63 pragma Import (C, C_Get_Char_Size,
64 "get_target_char_size");
65 begin
66 return C_Get_Char_Size;
67 end Get_Char_Size;
68
69 ----------------------
70 -- Get_Wchar_T_Size --
71 ----------------------
72
73 function Get_Wchar_T_Size return Pos is
74 function C_Get_Wchar_T_Size return Pos;
75 pragma Import (C, C_Get_Wchar_T_Size,
76 "get_target_wchar_t_size");
77 begin
78 return C_Get_Wchar_T_Size;
79 end Get_Wchar_T_Size;
80
81 --------------------
82 -- Get_Short_Size --
83 --------------------
84
85 function Get_Short_Size return Pos is
86 function C_Get_Short_Size return Pos;
87 pragma Import (C, C_Get_Short_Size,
88 "get_target_short_size");
89 begin
90 return C_Get_Short_Size;
91 end Get_Short_Size;
92
93 ------------------
94 -- Get_Int_Size --
95 ------------------
96
97 function Get_Int_Size return Pos is
98 function C_Get_Int_Size return Pos;
99 pragma Import (C, C_Get_Int_Size,
100 "get_target_int_size");
101 begin
102 return C_Get_Int_Size;
103 end Get_Int_Size;
104
105 -------------------
106 -- Get_Long_Size --
107 -------------------
108
109 function Get_Long_Size return Pos is
110 function C_Get_Long_Size return Pos;
111 pragma Import (C, C_Get_Long_Size,
112 "get_target_long_size");
113 begin
114 return C_Get_Long_Size;
115 end Get_Long_Size;
116
117 ------------------------
118 -- Get_Long_Long_Size --
119 ------------------------
120
121 function Get_Long_Long_Size return Pos is
122 function C_Get_Long_Long_Size return Pos;
123 pragma Import (C, C_Get_Long_Long_Size,
124 "get_target_long_long_size");
125 begin
126 return C_Get_Long_Long_Size;
127 end Get_Long_Long_Size;
128
129 ----------------------
130 -- Get_Pointer_Size --
131 ----------------------
132
133 function Get_Pointer_Size return Pos is
134 function C_Get_Pointer_Size return Pos;
135 pragma Import (C, C_Get_Pointer_Size,
136 "get_target_pointer_size");
137 begin
138 return C_Get_Pointer_Size;
139 end Get_Pointer_Size;
140
141 ---------------------------
142 -- Get_Maximum_Alignment --
143 ---------------------------
144
145 function Get_Maximum_Alignment return Pos is
146 function C_Get_Maximum_Alignment return Pos;
147 pragma Import (C, C_Get_Maximum_Alignment,
148 "get_target_maximum_alignment");
149 begin
150 return C_Get_Maximum_Alignment;
151 end Get_Maximum_Alignment;
152
153 ------------------------
154 -- Get_Float_Words_BE --
155 ------------------------
156
157 function Get_Float_Words_BE return Nat is
158 function C_Get_Float_Words_BE return Nat;
159 pragma Import (C, C_Get_Float_Words_BE,
160 "get_target_float_words_be");
161 begin
162 return C_Get_Float_Words_BE;
163 end Get_Float_Words_BE;
164
165 ------------------
166 -- Get_Words_BE --
167 ------------------
168
169 function Get_Words_BE return Nat is
170 function C_Get_Words_BE return Nat;
171 pragma Import (C, C_Get_Words_BE,
172 "get_target_words_be");
173 begin
174 return C_Get_Words_BE;
175 end Get_Words_BE;
176
177 ------------------
178 -- Get_Bytes_BE --
179 ------------------
180
181 function Get_Bytes_BE return Nat is
182 function C_Get_Bytes_BE return Nat;
183 pragma Import (C, C_Get_Bytes_BE,
184 "get_target_bytes_be");
185 begin
186 return C_Get_Bytes_BE;
187 end Get_Bytes_BE;
188
189 -----------------
190 -- Get_Bits_BE --
191 -----------------
192
193 function Get_Bits_BE return Nat is
194 function C_Get_Bits_BE return Nat;
195 pragma Import (C, C_Get_Bits_BE,
196 "get_target_bits_be");
197 begin
198 return C_Get_Bits_BE;
199 end Get_Bits_BE;
200
201 ---------------------
202 -- Get_Short_Enums --
203 ---------------------
204
205 function Get_Short_Enums return Int is
206 flag_short_enums : Int;
207 pragma Import (C, flag_short_enums);
208 begin
209 return flag_short_enums;
210 end Get_Short_Enums;
211
212 --------------------------
213 -- Get_Strict_Alignment --
214 --------------------------
215
216 function Get_Strict_Alignment return Nat is
217 function C_Get_Strict_Alignment return Nat;
218 pragma Import (C, C_Get_Strict_Alignment,
219 "get_target_strict_alignment");
220 begin
221 return C_Get_Strict_Alignment;
222 end Get_Strict_Alignment;
223
224 ------------------------------------
225 -- Get_System_Allocator_Alignment --
226 ------------------------------------
227
228 function Get_System_Allocator_Alignment return Nat is
229 function C_Get_System_Allocator_Alignment return Nat;
230 pragma Import (C, C_Get_System_Allocator_Alignment,
231 "get_target_system_allocator_alignment");
232 begin
233 return C_Get_System_Allocator_Alignment;
234 end Get_System_Allocator_Alignment;
235
236 --------------------------------
237 -- Get_Double_Float_Alignment --
238 --------------------------------
239
240 function Get_Double_Float_Alignment return Nat is
241 function C_Get_Double_Float_Alignment return Nat;
242 pragma Import (C, C_Get_Double_Float_Alignment,
243 "get_target_double_float_alignment");
244 begin
245 return C_Get_Double_Float_Alignment;
246 end Get_Double_Float_Alignment;
247
248 ---------------------------------
249 -- Get_Double_Scalar_Alignment --
250 ---------------------------------
251
252 function Get_Double_Scalar_Alignment return Nat is
253 function C_Get_Double_Scalar_Alignment return Nat;
254 pragma Import (C, C_Get_Double_Scalar_Alignment,
255 "get_target_double_scalar_alignment");
256 begin
257 return C_Get_Double_Scalar_Alignment;
258 end Get_Double_Scalar_Alignment;
259
260 ------------------------------
261 -- Get_Back_End_Config_File --
262 ------------------------------
263
264 function Get_Back_End_Config_File return String_Ptr is
265 begin
266 return null;
267 end Get_Back_End_Config_File;
268
269 ----------------------
270 -- Digits_From_Size --
271 ----------------------
272
273 function Digits_From_Size (Size : Pos) return Pos is
274 begin
275 case Size is
276 when 32 => return 6;
277 when 48 => return 9;
278 when 64 => return 15;
279 when 96 => return 18;
280 when 128 => return 18;
281 when others => raise Program_Error;
282 end case;
283 end Digits_From_Size;
284
285 -----------------------------
286 -- Get_Max_Unaligned_Field --
287 -----------------------------
288
289 function Get_Max_Unaligned_Field return Pos is
290 begin
291 return 64; -- Can be different on some targets (e.g., AAMP)
292 end Get_Max_Unaligned_Field;
293
294 -----------------------------
295 -- Register_Back_End_Types --
296 -----------------------------
297
298 procedure Register_Back_End_Types (Call_Back : Register_Type_Proc) is
299 procedure Enumerate_Modes (Call_Back : Register_Type_Proc);
300 pragma Import (C, Enumerate_Modes, "enumerate_modes");
301 begin
302 Enumerate_Modes (Call_Back);
303 end Register_Back_End_Types;
304
305 ---------------------
306 -- Width_From_Size --
307 ---------------------
308
309 function Width_From_Size (Size : Pos) return Pos is
310 begin
311 case Size is
312 when 8 => return 4;
313 when 16 => return 6;
314 when 32 => return 11;
315 when 64 => return 21;
316 when others => raise Program_Error;
317 end case;
318 end Width_From_Size;
319
320 end Get_Targ;