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comparison gcc/config/pdp11/2bsd.h @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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1 /* Definitions of target machine for GNU compiler, for a PDP with 2BSD
2 Copyright (C) 1995, 1996, 1999, 2000, 2007 Free Software Foundation, Inc.
3 Contributed by Michael K. Gschwind (mike@vlsivie.tuwien.ac.at).
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
11
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
20
21 #define TWO_BSD
22
23 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
24 the stack pointer does not matter. The value is tested only in
25 functions that have frame pointers.
26 No definition is equivalent to always zero. */
27
28 #undef EXIT_IGNORE_STACK
29 #define EXIT_IGNORE_STACK 1
30
31 #undef INITIAL_FRAME_POINTER_OFFSET
32 #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) \
33 { \
34 int offset; \
35 offset = get_frame_size(); \
36 offset = (offset <= 2)? 0: (offset -2); \
37 (DEPTH_VAR) = offset+10; \
38 }
39
40 /* Value should be nonzero if functions must have frame pointers.
41 Zero means the frame pointer need not be set up (and parms
42 may be accessed via the stack pointer) in functions that seem suitable.
43 This is computed in `reload', in reload1.c.
44 */
45
46 #undef FRAME_POINTER_REQUIRED
47 #define FRAME_POINTER_REQUIRED 1
48
49 /* Offset within stack frame to start allocating local variables at.
50 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
51 first local allocated. Otherwise, it is the offset to the BEGINNING
52 of the first local allocated. */
53 #undef STARTING_FRAME_OFFSET
54 #define STARTING_FRAME_OFFSET -8
55
56
57 #undef ASM_DECLARE_FUNCTION_NAME
58 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
59 do { \
60 ASM_OUTPUT_LABEL (STREAM, NAME); \
61 fprintf (STREAM, "~~%s:\n", NAME); \
62 } while (0)
63
64 #undef TARGET_UNIX_ASM_DEFAULT
65 #define TARGET_UNIX_ASM_DEFAULT MASK_UNIX_ASM