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1.1 root 1: /* Definitions of target machine for GNU compiler. Concurrent 68k version.
2: Copyright (C) 1987, 1988 Free Software Foundation, Inc.
3:
4: This file is part of GNU CC.
5:
6: GNU CC is free software; you can redistribute it and/or modify
7: it under the terms of the GNU General Public License as published by
8: the Free Software Foundation; either version 1, or (at your option)
9: any later version.
10:
11: GNU CC is distributed in the hope that it will be useful,
12: but WITHOUT ANY WARRANTY; without even the implied warranty of
13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14: GNU General Public License for more details.
15:
16: You should have received a copy of the GNU General Public License
17: along with GNU CC; see the file COPYING. If not, write to
18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19:
20: #ifndef MASSCOMP
21: #define MASSCOMP
22: #endif
23:
24: #ifndef CONCURRENT
25: #define CONCURRENT
26: #endif
27:
28: #ifndef __mc68000__
29: #define __mc68000__
30: #endif
31:
32: #ifndef __mc68020__
33: #define __mc68020__
34: #endif
35:
36: #define USE_GAS
37: #define MOVE_RATIO 100
38:
39: #define SPACE_AFTER_L_OPTION
40: #define SWITCHES_NEED_SPACES " "
41:
42: #define TARGET_DEFAULT 0407 /* See m68k.h. 7 means 68020 with 68881. */
43:
44: #include "m68k/m68k.h"
45:
46: #define SIZE_TYPE "int"
47:
48: /* for 68k machines this only needs to be TRUE for the 68000 */
49:
50: #undef STRICT_ALIGNMENT
51: #define STRICT_ALIGNMENT 0
52:
53: /* Names to predefine in the preprocessor for this target machine. */
54: #define CPP_PREDEFINES \
55: "-Dmc68000 -Dmasscomp -DMASSCOMP -Dunix -DLANGUAGE_C -Dconcurrent -DCONCURRENT"
56:
57: #undef TARGET_VERSION
58: #define TARGET_VERSION fprintf (stderr, " (68k, GNU GAS syntax)");
59:
60: /* Discard internal local symbols beginning with 'L'. */
61: #define LINK_SPEC "-X"
62:
63: /* Every structure or union's size must be a multiple of 4 bytes. */
64: #define STRUCTURE_SIZE_BOUNDARY 16
65:
66: /* No data type wants to be aligned rounder than this. */
67: #undef BIGGEST_ALIGNMENT
68: #define BIGGEST_ALIGNMENT 32
69:
70: /* Allocation boundary (in *bits*) for storing pointers in memory. */
71: #undef POINTER_BOUNDARY
72: #define POINTER_BOUNDARY 32
73:
74: /* Alignment of field after `int : 0' in a structure. */
75: #undef EMPTY_FIELD_BOUNDARY
76: #define EMPTY_FIELD_BOUNDARY 32
77:
78: /* Allocation boundry in bits for the code of a function */
79: #undef FUNCTION_BOUNDRY
80: #define FUNCTION_BOUNDRY 32
81:
82: /* Make strings long-word aligned so dhrystones will run faster. */
83: #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
84: (TREE_CODE (EXP) == STRING_CST \
85: && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
86:
87: /* Make arrays of chars word-aligned for the same reasons. */
88: #define DATA_ALIGNMENT(TYPE, ALIGN) \
89: (TREE_CODE (TYPE) == ARRAY_TYPE \
90: && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
91: && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
92:
93: /* This is BSD, so it wants DBX format. */
94: #define DBX_DEBUGGING_INFO
95:
96: /* Override parts of m68k.h */
97:
98: #undef CALL_USED_REGISTERS
99: #define CALL_USED_REGISTERS \
100: {1, 1, 0, 0, 0, 0, 0, 0, \
101: 1, 1, 0, 0, 0, 0, 0, 1, \
102: 1, 1, 0, 0, 0, 0, 1, 1 }
103:
104: #undef REG_ALLOC_ORDER
105: #define REG_ALLOC_ORDER \
106: { 0, 1, 2, 3, 4, 5, 6, 7,\
107: 8, 9, 10, 11, 12, 13, 14, 15, \
108: 16, 17, 22, 23, 18, 19, 20, 21 }
109:
110: #undef ASM_FILE_START
111: #define ASM_FILE_START(FILE) \
112: fprintf (FILE, "#NO_APP\n.globl fltused\n");
113:
114: #undef ASM_OUTPUT_ALIGN
115: #define ASM_OUTPUT_ALIGN(FILE,LOG) \
116: { int _LOG = LOG; \
117: if (_LOG == 1) \
118: fprintf (FILE, "\t.even\n"); \
119: else if (_LOG == 2) \
120: fprintf (FILE, "\t.align 4\n"); \
121: else if (_LOG != 0) \
122: fprintf (FILE, "\t.align %d\n", _LOG);\
123: }
124:
125: /* crt0.c should use the vax-bsd style of entry, with a dummy arg. */
126:
127: #define CRT0_DUMMIES bogus_fp,
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