1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . A U X _ D E C --
9 -- Copyright (C) 1996-2009, 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. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 -- This package contains definitions that are designed to be compatible
33 -- with the extra definitions in package System for DEC Ada implementations.
35 -- These definitions can be used directly by withing this package, or merged
36 -- with System using pragma Extend_System (Aux_DEC)
38 with Ada.Unchecked_Conversion;
40 package System.Aux_DEC is
43 subtype Short_Address is Address;
44 -- In some versions of System.Aux_DEC, notably that for VMS on the
45 -- ia64, there are two address types (64-bit and 32-bit), and the
46 -- name Short_Address is used for the short address form. To avoid
47 -- difficulties (in regression tests and elsewhere) with units that
48 -- reference Short_Address, it is provided for other targets as a
49 -- synonym for the normal Address type, and, as in the case where
50 -- the lengths are different, Address and Short_Address can be
51 -- freely inter-converted.
53 type Integer_8 is range -2 ** (8 - 1) .. +2 ** (8 - 1) - 1;
54 for Integer_8'Size use 8;
56 type Integer_16 is range -2 ** (16 - 1) .. +2 ** (16 - 1) - 1;
57 for Integer_16'Size use 16;
59 type Integer_32 is range -2 ** (32 - 1) .. +2 ** (32 - 1) - 1;
60 for Integer_32'Size use 32;
62 type Integer_64 is range -2 ** (64 - 1) .. +2 ** (64 - 1) - 1;
63 for Integer_64'Size use 64;
65 type Largest_Integer is range Min_Int .. Max_Int;
67 type AST_Handler is private;
69 No_AST_Handler : constant AST_Handler;
72 (Type_Class_Enumeration,
74 Type_Class_Fixed_Point,
75 Type_Class_Floating_Point,
79 Type_Class_Task, -- also in Ada 95 protected
82 function "not" (Left : Largest_Integer) return Largest_Integer;
83 function "and" (Left, Right : Largest_Integer) return Largest_Integer;
84 function "or" (Left, Right : Largest_Integer) return Largest_Integer;
85 function "xor" (Left, Right : Largest_Integer) return Largest_Integer;
87 Address_Zero : constant Address;
88 No_Addr : constant Address;
89 Address_Size : constant := Standard'Address_Size;
90 Short_Address_Size : constant := Standard'Address_Size;
92 function "+" (Left : Address; Right : Integer) return Address;
93 function "+" (Left : Integer; Right : Address) return Address;
94 function "-" (Left : Address; Right : Address) return Integer;
95 function "-" (Left : Address; Right : Integer) return Address;
98 type Target is private;
99 function Fetch_From_Address (A : Address) return Target;
102 type Target is private;
103 procedure Assign_To_Address (A : Address; T : Target);
105 -- Floating point type declarations for VAX floating point data types
107 pragma Warnings (Off);
109 type F_Float is digits 6;
110 pragma Float_Representation (VAX_Float, F_Float);
112 type D_Float is digits 9;
113 pragma Float_Representation (Vax_Float, D_Float);
115 type G_Float is digits 15;
116 pragma Float_Representation (Vax_Float, G_Float);
118 -- Floating point type declarations for IEEE floating point data types
120 type IEEE_Single_Float is digits 6;
121 pragma Float_Representation (IEEE_Float, IEEE_Single_Float);
123 type IEEE_Double_Float is digits 15;
124 pragma Float_Representation (IEEE_Float, IEEE_Double_Float);
126 pragma Warnings (On);
128 Non_Ada_Error : exception;
130 -- Hardware-oriented types and functions
132 type Bit_Array is array (Integer range <>) of Boolean;
133 pragma Pack (Bit_Array);
135 subtype Bit_Array_8 is Bit_Array (0 .. 7);
136 subtype Bit_Array_16 is Bit_Array (0 .. 15);
137 subtype Bit_Array_32 is Bit_Array (0 .. 31);
138 subtype Bit_Array_64 is Bit_Array (0 .. 63);
140 type Unsigned_Byte is range 0 .. 255;
141 for Unsigned_Byte'Size use 8;
143 function "not" (Left : Unsigned_Byte) return Unsigned_Byte;
144 function "and" (Left, Right : Unsigned_Byte) return Unsigned_Byte;
145 function "or" (Left, Right : Unsigned_Byte) return Unsigned_Byte;
146 function "xor" (Left, Right : Unsigned_Byte) return Unsigned_Byte;
148 function To_Unsigned_Byte (X : Bit_Array_8) return Unsigned_Byte;
149 function To_Bit_Array_8 (X : Unsigned_Byte) return Bit_Array_8;
151 type Unsigned_Byte_Array is array (Integer range <>) of Unsigned_Byte;
153 type Unsigned_Word is range 0 .. 65535;
154 for Unsigned_Word'Size use 16;
156 function "not" (Left : Unsigned_Word) return Unsigned_Word;
157 function "and" (Left, Right : Unsigned_Word) return Unsigned_Word;
158 function "or" (Left, Right : Unsigned_Word) return Unsigned_Word;
159 function "xor" (Left, Right : Unsigned_Word) return Unsigned_Word;
161 function To_Unsigned_Word (X : Bit_Array_16) return Unsigned_Word;
162 function To_Bit_Array_16 (X : Unsigned_Word) return Bit_Array_16;
164 type Unsigned_Word_Array is array (Integer range <>) of Unsigned_Word;
166 type Unsigned_Longword is range -2_147_483_648 .. 2_147_483_647;
167 for Unsigned_Longword'Size use 32;
169 function "not" (Left : Unsigned_Longword) return Unsigned_Longword;
170 function "and" (Left, Right : Unsigned_Longword) return Unsigned_Longword;
171 function "or" (Left, Right : Unsigned_Longword) return Unsigned_Longword;
172 function "xor" (Left, Right : Unsigned_Longword) return Unsigned_Longword;
174 function To_Unsigned_Longword (X : Bit_Array_32) return Unsigned_Longword;
175 function To_Bit_Array_32 (X : Unsigned_Longword) return Bit_Array_32;
177 type Unsigned_Longword_Array is
178 array (Integer range <>) of Unsigned_Longword;
180 type Unsigned_32 is range 0 .. 4_294_967_295;
181 for Unsigned_32'Size use 32;
183 function "not" (Left : Unsigned_32) return Unsigned_32;
184 function "and" (Left, Right : Unsigned_32) return Unsigned_32;
185 function "or" (Left, Right : Unsigned_32) return Unsigned_32;
186 function "xor" (Left, Right : Unsigned_32) return Unsigned_32;
188 function To_Unsigned_32 (X : Bit_Array_32) return Unsigned_32;
189 function To_Bit_Array_32 (X : Unsigned_32) return Bit_Array_32;
191 type Unsigned_Quadword is record
192 L0 : Unsigned_Longword;
193 L1 : Unsigned_Longword;
196 for Unsigned_Quadword'Size use 64;
197 for Unsigned_Quadword'Alignment use
198 Integer'Min (8, Standard'Maximum_Alignment);
200 function "not" (Left : Unsigned_Quadword) return Unsigned_Quadword;
201 function "and" (Left, Right : Unsigned_Quadword) return Unsigned_Quadword;
202 function "or" (Left, Right : Unsigned_Quadword) return Unsigned_Quadword;
203 function "xor" (Left, Right : Unsigned_Quadword) return Unsigned_Quadword;
205 function To_Unsigned_Quadword (X : Bit_Array_64) return Unsigned_Quadword;
206 function To_Bit_Array_64 (X : Unsigned_Quadword) return Bit_Array_64;
208 type Unsigned_Quadword_Array is
209 array (Integer range <>) of Unsigned_Quadword;
211 function To_Address (X : Integer) return Address;
212 pragma Pure_Function (To_Address);
214 function To_Address_Long (X : Unsigned_Longword) return Address;
215 pragma Pure_Function (To_Address_Long);
217 function To_Integer (X : Address) return Integer;
219 function To_Unsigned_Longword (X : Address) return Unsigned_Longword;
220 function To_Unsigned_Longword (X : AST_Handler) return Unsigned_Longword;
222 -- Conventional names for static subtypes of type UNSIGNED_LONGWORD
224 subtype Unsigned_1 is Unsigned_Longword range 0 .. 2** 1-1;
225 subtype Unsigned_2 is Unsigned_Longword range 0 .. 2** 2-1;
226 subtype Unsigned_3 is Unsigned_Longword range 0 .. 2** 3-1;
227 subtype Unsigned_4 is Unsigned_Longword range 0 .. 2** 4-1;
228 subtype Unsigned_5 is Unsigned_Longword range 0 .. 2** 5-1;
229 subtype Unsigned_6 is Unsigned_Longword range 0 .. 2** 6-1;
230 subtype Unsigned_7 is Unsigned_Longword range 0 .. 2** 7-1;
231 subtype Unsigned_8 is Unsigned_Longword range 0 .. 2** 8-1;
232 subtype Unsigned_9 is Unsigned_Longword range 0 .. 2** 9-1;
233 subtype Unsigned_10 is Unsigned_Longword range 0 .. 2**10-1;
234 subtype Unsigned_11 is Unsigned_Longword range 0 .. 2**11-1;
235 subtype Unsigned_12 is Unsigned_Longword range 0 .. 2**12-1;
236 subtype Unsigned_13 is Unsigned_Longword range 0 .. 2**13-1;
237 subtype Unsigned_14 is Unsigned_Longword range 0 .. 2**14-1;
238 subtype Unsigned_15 is Unsigned_Longword range 0 .. 2**15-1;
239 subtype Unsigned_16 is Unsigned_Longword range 0 .. 2**16-1;
240 subtype Unsigned_17 is Unsigned_Longword range 0 .. 2**17-1;
241 subtype Unsigned_18 is Unsigned_Longword range 0 .. 2**18-1;
242 subtype Unsigned_19 is Unsigned_Longword range 0 .. 2**19-1;
243 subtype Unsigned_20 is Unsigned_Longword range 0 .. 2**20-1;
244 subtype Unsigned_21 is Unsigned_Longword range 0 .. 2**21-1;
245 subtype Unsigned_22 is Unsigned_Longword range 0 .. 2**22-1;
246 subtype Unsigned_23 is Unsigned_Longword range 0 .. 2**23-1;
247 subtype Unsigned_24 is Unsigned_Longword range 0 .. 2**24-1;
248 subtype Unsigned_25 is Unsigned_Longword range 0 .. 2**25-1;
249 subtype Unsigned_26 is Unsigned_Longword range 0 .. 2**26-1;
250 subtype Unsigned_27 is Unsigned_Longword range 0 .. 2**27-1;
251 subtype Unsigned_28 is Unsigned_Longword range 0 .. 2**28-1;
252 subtype Unsigned_29 is Unsigned_Longword range 0 .. 2**29-1;
253 subtype Unsigned_30 is Unsigned_Longword range 0 .. 2**30-1;
254 subtype Unsigned_31 is Unsigned_Longword range 0 .. 2**31-1;
256 -- Function for obtaining global symbol values
258 function Import_Value (Symbol : String) return Unsigned_Longword;
259 function Import_Address (Symbol : String) return Address;
260 function Import_Largest_Value (Symbol : String) return Largest_Integer;
262 pragma Import (Intrinsic, Import_Value);
263 pragma Import (Intrinsic, Import_Address);
264 pragma Import (Intrinsic, Import_Largest_Value);
266 -- For the following declarations, note that the declaration without
267 -- a Retry_Count parameter means to retry infinitely. A value of zero
268 -- for the Retry_Count parameter means do not retry.
270 -- Interlocked-instruction procedures
272 procedure Clear_Interlocked
273 (Bit : in out Boolean;
274 Old_Value : out Boolean);
276 procedure Set_Interlocked
277 (Bit : in out Boolean;
278 Old_Value : out Boolean);
280 type Aligned_Word is record
281 Value : Short_Integer;
284 for Aligned_Word'Alignment use
285 Integer'Min (2, Standard'Maximum_Alignment);
287 procedure Clear_Interlocked
288 (Bit : in out Boolean;
289 Old_Value : out Boolean;
290 Retry_Count : Natural;
291 Success_Flag : out Boolean);
293 procedure Set_Interlocked
294 (Bit : in out Boolean;
295 Old_Value : out Boolean;
296 Retry_Count : Natural;
297 Success_Flag : out Boolean);
299 procedure Add_Interlocked
300 (Addend : Short_Integer;
301 Augend : in out Aligned_Word;
304 type Aligned_Integer is record
308 for Aligned_Integer'Alignment use
309 Integer'Min (4, Standard'Maximum_Alignment);
311 type Aligned_Long_Integer is record
312 Value : Long_Integer;
315 for Aligned_Long_Integer'Alignment use
316 Integer'Min (8, Standard'Maximum_Alignment);
318 -- For the following declarations, note that the declaration without
319 -- a Retry_Count parameter mean to retry infinitely. A value of zero
320 -- for the Retry_Count means do not retry.
323 (To : in out Aligned_Integer;
327 (To : in out Aligned_Integer;
329 Retry_Count : Natural;
330 Old_Value : out Integer;
331 Success_Flag : out Boolean);
334 (To : in out Aligned_Long_Integer;
335 Amount : Long_Integer);
338 (To : in out Aligned_Long_Integer;
339 Amount : Long_Integer;
340 Retry_Count : Natural;
341 Old_Value : out Long_Integer;
342 Success_Flag : out Boolean);
345 (To : in out Aligned_Integer;
349 (To : in out Aligned_Integer;
351 Retry_Count : Natural;
352 Old_Value : out Integer;
353 Success_Flag : out Boolean);
356 (To : in out Aligned_Long_Integer;
357 From : Long_Integer);
360 (To : in out Aligned_Long_Integer;
362 Retry_Count : Natural;
363 Old_Value : out Long_Integer;
364 Success_Flag : out Boolean);
367 (To : in out Aligned_Integer;
371 (To : in out Aligned_Integer;
373 Retry_Count : Natural;
374 Old_Value : out Integer;
375 Success_Flag : out Boolean);
378 (To : in out Aligned_Long_Integer;
379 From : Long_Integer);
382 (To : in out Aligned_Long_Integer;
384 Retry_Count : Natural;
385 Old_Value : out Long_Integer;
386 Success_Flag : out Boolean);
389 (Fail_No_Lock, OK_Not_First, OK_First);
396 type Remq_Status is (
411 Status : out Insq_Status);
416 Status : out Remq_Status);
421 Status : out Insq_Status);
426 Status : out Remq_Status);
430 Address_Zero : constant Address := Null_Address;
431 No_Addr : constant Address := Null_Address;
433 -- An AST_Handler value is from a typing point of view simply a pointer
434 -- to a procedure taking a single 64bit parameter. However, this
435 -- is a bit misleading, because the data that this pointer references is
436 -- highly stylized. See body of System.AST_Handling for full details.
438 type AST_Handler is access procedure (Param : Long_Integer);
439 No_AST_Handler : constant AST_Handler := null;
441 -- Other operators have incorrect profiles. It would be nice to make
442 -- them intrinsic, since the backend can handle them, but the front
443 -- end is not prepared to deal with them, so at least inline them.
445 pragma Inline_Always ("+");
446 pragma Inline_Always ("-");
447 pragma Inline_Always ("not");
448 pragma Inline_Always ("and");
449 pragma Inline_Always ("or");
450 pragma Inline_Always ("xor");
452 -- Other inlined subprograms
454 pragma Inline_Always (Fetch_From_Address);
455 pragma Inline_Always (Assign_To_Address);
457 -- Synchronization related subprograms. Mechanism is explicitly set
458 -- so that the critical parameters are passed by reference.
459 -- Without this, the parameters are passed by copy, creating load/store
460 -- race conditions. We also inline them, since this seems more in the
461 -- spirit of the original (hardware intrinsic) routines.
463 pragma Export_Procedure
465 External => "system__aux_dec__clear_interlocked__1",
466 Parameter_Types => (Boolean, Boolean),
467 Mechanism => (Reference, Reference));
468 pragma Export_Procedure
470 External => "system__aux_dec__clear_interlocked__2",
471 Parameter_Types => (Boolean, Boolean, Natural, Boolean),
472 Mechanism => (Reference, Reference, Value, Reference));
473 pragma Inline_Always (Clear_Interlocked);
475 pragma Export_Procedure
477 External => "system__aux_dec__set_interlocked__1",
478 Parameter_Types => (Boolean, Boolean),
479 Mechanism => (Reference, Reference));
480 pragma Export_Procedure
482 External => "system__aux_dec__set_interlocked__2",
483 Parameter_Types => (Boolean, Boolean, Natural, Boolean),
484 Mechanism => (Reference, Reference, Value, Reference));
485 pragma Inline_Always (Set_Interlocked);
487 pragma Export_Procedure
489 External => "system__aux_dec__add_interlocked__1",
490 Mechanism => (Value, Reference, Reference));
491 pragma Inline_Always (Add_Interlocked);
493 pragma Export_Procedure
495 External => "system__aux_dec__add_atomic__1",
496 Parameter_Types => (Aligned_Integer, Integer),
497 Mechanism => (Reference, Value));
498 pragma Export_Procedure
500 External => "system__aux_dec__add_atomic__2",
501 Parameter_Types => (Aligned_Integer, Integer, Natural, Integer, Boolean),
502 Mechanism => (Reference, Value, Value, Reference, Reference));
503 pragma Export_Procedure
505 External => "system__aux_dec__add_atomic__3",
506 Parameter_Types => (Aligned_Long_Integer, Long_Integer),
507 Mechanism => (Reference, Value));
508 pragma Export_Procedure
510 External => "system__aux_dec__add_atomic__4",
511 Parameter_Types => (Aligned_Long_Integer, Long_Integer, Natural,
512 Long_Integer, Boolean),
513 Mechanism => (Reference, Value, Value, Reference, Reference));
514 pragma Inline_Always (Add_Atomic);
516 pragma Export_Procedure
518 External => "system__aux_dec__and_atomic__1",
519 Parameter_Types => (Aligned_Integer, Integer),
520 Mechanism => (Reference, Value));
521 pragma Export_Procedure
523 External => "system__aux_dec__and_atomic__2",
524 Parameter_Types => (Aligned_Integer, Integer, Natural, Integer, Boolean),
525 Mechanism => (Reference, Value, Value, Reference, Reference));
526 pragma Export_Procedure
528 External => "system__aux_dec__and_atomic__3",
529 Parameter_Types => (Aligned_Long_Integer, Long_Integer),
530 Mechanism => (Reference, Value));
531 pragma Export_Procedure
533 External => "system__aux_dec__and_atomic__4",
534 Parameter_Types => (Aligned_Long_Integer, Long_Integer, Natural,
535 Long_Integer, Boolean),
536 Mechanism => (Reference, Value, Value, Reference, Reference));
537 pragma Inline_Always (And_Atomic);
539 pragma Export_Procedure
541 External => "system__aux_dec__or_atomic__1",
542 Parameter_Types => (Aligned_Integer, Integer),
543 Mechanism => (Reference, Value));
544 pragma Export_Procedure
546 External => "system__aux_dec__or_atomic__2",
547 Parameter_Types => (Aligned_Integer, Integer, Natural, Integer, Boolean),
548 Mechanism => (Reference, Value, Value, Reference, Reference));
549 pragma Export_Procedure
551 External => "system__aux_dec__or_atomic__3",
552 Parameter_Types => (Aligned_Long_Integer, Long_Integer),
553 Mechanism => (Reference, Value));
554 pragma Export_Procedure
556 External => "system__aux_dec__or_atomic__4",
557 Parameter_Types => (Aligned_Long_Integer, Long_Integer, Natural,
558 Long_Integer, Boolean),
559 Mechanism => (Reference, Value, Value, Reference, Reference));
560 pragma Inline_Always (Or_Atomic);
562 -- Provide proper unchecked conversion definitions for transfer
563 -- functions. Note that we need this level of indirection because
564 -- the formal parameter name is X and not Source (and this is indeed
565 -- detectable by a program)
567 function To_Unsigned_Byte_A is new
568 Ada.Unchecked_Conversion (Bit_Array_8, Unsigned_Byte);
570 function To_Unsigned_Byte (X : Bit_Array_8) return Unsigned_Byte
571 renames To_Unsigned_Byte_A;
573 function To_Bit_Array_8_A is new
574 Ada.Unchecked_Conversion (Unsigned_Byte, Bit_Array_8);
576 function To_Bit_Array_8 (X : Unsigned_Byte) return Bit_Array_8
577 renames To_Bit_Array_8_A;
579 function To_Unsigned_Word_A is new
580 Ada.Unchecked_Conversion (Bit_Array_16, Unsigned_Word);
582 function To_Unsigned_Word (X : Bit_Array_16) return Unsigned_Word
583 renames To_Unsigned_Word_A;
585 function To_Bit_Array_16_A is new
586 Ada.Unchecked_Conversion (Unsigned_Word, Bit_Array_16);
588 function To_Bit_Array_16 (X : Unsigned_Word) return Bit_Array_16
589 renames To_Bit_Array_16_A;
591 function To_Unsigned_Longword_A is new
592 Ada.Unchecked_Conversion (Bit_Array_32, Unsigned_Longword);
594 function To_Unsigned_Longword (X : Bit_Array_32) return Unsigned_Longword
595 renames To_Unsigned_Longword_A;
597 function To_Bit_Array_32_A is new
598 Ada.Unchecked_Conversion (Unsigned_Longword, Bit_Array_32);
600 function To_Bit_Array_32 (X : Unsigned_Longword) return Bit_Array_32
601 renames To_Bit_Array_32_A;
603 function To_Unsigned_32_A is new
604 Ada.Unchecked_Conversion (Bit_Array_32, Unsigned_32);
606 function To_Unsigned_32 (X : Bit_Array_32) return Unsigned_32
607 renames To_Unsigned_32_A;
609 function To_Bit_Array_32_A is new
610 Ada.Unchecked_Conversion (Unsigned_32, Bit_Array_32);
612 function To_Bit_Array_32 (X : Unsigned_32) return Bit_Array_32
613 renames To_Bit_Array_32_A;
615 function To_Unsigned_Quadword_A is new
616 Ada.Unchecked_Conversion (Bit_Array_64, Unsigned_Quadword);
618 function To_Unsigned_Quadword (X : Bit_Array_64) return Unsigned_Quadword
619 renames To_Unsigned_Quadword_A;
621 function To_Bit_Array_64_A is new
622 Ada.Unchecked_Conversion (Unsigned_Quadword, Bit_Array_64);
624 function To_Bit_Array_64 (X : Unsigned_Quadword) return Bit_Array_64
625 renames To_Bit_Array_64_A;
627 pragma Warnings (Off);
628 -- Turn warnings off. This is needed for systems with 64-bit integers,
629 -- where some of these operations are of dubious meaning, but we do not
630 -- want warnings when we compile on such systems.
632 function To_Address_A is new
633 Ada.Unchecked_Conversion (Integer, Address);
634 pragma Pure_Function (To_Address_A);
636 function To_Address (X : Integer) return Address
637 renames To_Address_A;
638 pragma Pure_Function (To_Address);
640 function To_Address_Long_A is new
641 Ada.Unchecked_Conversion (Unsigned_Longword, Address);
642 pragma Pure_Function (To_Address_Long_A);
644 function To_Address_Long (X : Unsigned_Longword) return Address
645 renames To_Address_Long_A;
646 pragma Pure_Function (To_Address_Long);
648 function To_Integer_A is new
649 Ada.Unchecked_Conversion (Address, Integer);
651 function To_Integer (X : Address) return Integer
652 renames To_Integer_A;
654 function To_Unsigned_Longword_A is new
655 Ada.Unchecked_Conversion (Address, Unsigned_Longword);
657 function To_Unsigned_Longword (X : Address) return Unsigned_Longword
658 renames To_Unsigned_Longword_A;
660 function To_Unsigned_Longword_A is new
661 Ada.Unchecked_Conversion (AST_Handler, Unsigned_Longword);
663 function To_Unsigned_Longword (X : AST_Handler) return Unsigned_Longword
664 renames To_Unsigned_Longword_A;
666 pragma Warnings (On);