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ea76e85d | 1 | /* Definitions of target machine for GNU compiler. Apollo 680X0 version. |
b18135da | 2 | Copyright (C) 1989,1992 Free Software Foundation, Inc. |
ea76e85d RS |
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 2, 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 | ||
57e51b0e | 20 | #include "m68k/m68k.h" |
ea76e85d RS |
21 | |
22 | /* This symbol may be tested in other files for special Apollo handling */ | |
23 | ||
24 | #define TM_APOLLO | |
25 | ||
26 | /* See m68k.h. 7 means 68020 with 68881. */ | |
27 | ||
28 | #ifndef TARGET_DEFAULT | |
29 | #define TARGET_DEFAULT 7 | |
30 | #endif | |
31 | ||
32 | /* Target switches for the Apollo is the same as in m68k.h, except | |
33 | there is no Sun FPA. */ | |
34 | ||
35 | #undef TARGET_SWITCHES | |
36 | #define TARGET_SWITCHES \ | |
37 | { { "68020", 5}, \ | |
38 | { "c68020", 5}, \ | |
39 | { "68881", 2}, \ | |
40 | { "bitfield", 4}, \ | |
41 | { "68000", -5}, \ | |
42 | { "c68000", -5}, \ | |
43 | { "soft-float", -0102}, \ | |
44 | { "nobitfield", -4}, \ | |
45 | { "rtd", 8}, \ | |
46 | { "nortd", -8}, \ | |
47 | { "short", 040}, \ | |
48 | { "noshort", -040}, \ | |
49 | { "", TARGET_DEFAULT}} | |
50 | ||
51 | /* Define __HAVE_68881__ in preprocessor, | |
52 | according to the -m flags. | |
53 | This will control the use of inline 68881 insns in certain macros. | |
54 | Also inform the program which CPU this is for. */ | |
55 | ||
56 | #if TARGET_DEFAULT & 02 | |
57 | ||
58 | /* -m68881 is the default */ | |
59 | #define CPP_SPEC \ | |
60 | "%{!msoft-float:%{mfpa:-D__HAVE_FPA__ }%{!mfpa:-D__HAVE_68881__ }}\ | |
61 | %{!ansi:%{m68000:-Dmc68010 }%{mc68000:-Dmc68010 }%{!mc68000:%{!m68000:-Dmc68020 }}\ | |
62 | %{!ansi:-D_APOLLO_SOURCE}}" | |
63 | ||
64 | #else | |
65 | ||
66 | /* -msoft-float is the default */ | |
67 | #define CPP_SPEC \ | |
68 | "%{m68881:-D__HAVE_68881__ }%{mfpa:-D__HAVE_FPA__ }\ | |
69 | %{!ansi:%{m68000:-Dmc68010 }%{mc68000:-Dmc68010 }%{!mc68000:%{!m68000:-Dmc68020 }}\ | |
70 | %{!ansi:-D_APOLLO_SOURCE}}" | |
71 | ||
72 | #endif | |
73 | ||
74 | /* Names to predefine in the preprocessor for this target machine. */ | |
75 | /* These are the ones defined by Apollo, plus mc68000 for uniformity with | |
76 | GCC on other 68000 systems. */ | |
77 | ||
78 | #define CPP_PREDEFINES "-Dapollo -Daegis -Dunix" | |
79 | ||
80 | /* cpp has to support a #sccs directive for the /usr/include files */ | |
81 | ||
82 | #define SCCS_DIRECTIVE | |
83 | ||
84 | /* Allow #ident but output nothing for it. */ | |
85 | ||
86 | #define IDENT_DIRECTIVE | |
87 | #define ASM_OUTPUT_IDENT(FILE, NAME) | |
88 | ||
89 | /* Allow dollarsigns in identifiers */ | |
90 | ||
91 | #define DOLLARS_IN_IDENTIFIERS 2 | |
92 | ||
b18135da | 93 | /* -m68000 requires special flags to the assembler. */ |
ea76e85d RS |
94 | |
95 | #define ASM_SPEC \ | |
b18135da | 96 | "%{m68000:-mc68010}%{mc68000:-mc68010}%{!mc68000:%{!m68000:-mc68020}}" |
ea76e85d RS |
97 | |
98 | /* STARTFILE_SPEC | |
99 | Note that includes knowledge of the default specs for gcc, ie. no | |
100 | args translates to the same effect as -m68881 */ | |
101 | ||
102 | #if TARGET_DEFAULT & 2 | |
103 | /* -m68881 is the default */ | |
104 | #define STARTFILE_SPEC \ | |
105 | "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}" | |
106 | #else | |
107 | /* -msoft-float is the default */ | |
108 | #define STARTFILE_SPEC \ | |
109 | "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}" | |
110 | #endif | |
111 | ||
112 | /* Specify library to handle `-a' basic block profiling. */ | |
113 | ||
114 | #define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} \ | |
115 | %{a:/usr/lib/bb_link.o} " | |
116 | ||
117 | /* Debugging is not supported yet */ | |
118 | ||
119 | #undef DBX_DEBUGGING_INFO | |
120 | #undef SDB_DEBUGGING_INFO | |
121 | ||
b18135da RS |
122 | /* We have atexit(2). So C++ can use it for global destructors. */ |
123 | ||
579922c1 RS |
124 | #if 0 /* troy@cbme.unsw.edu.au says people are still using sr10.2 |
125 | and it does not support atexit. */ | |
b18135da | 126 | #define HAVE_ATEXIT |
579922c1 | 127 | #endif |
b18135da | 128 | |
ea76e85d RS |
129 | /* Every structure or union's size must be a multiple of 2 bytes. */ |
130 | ||
131 | #define STRUCTURE_SIZE_BOUNDARY 16 | |
132 | ||
b18135da RS |
133 | /* Boundary (in *bits*) on which stack pointer should be aligned. */ |
134 | #undef STACK_BOUNDARY | |
135 | #define STACK_BOUNDARY 32 | |
136 | ||
ea76e85d | 137 | /* Functions which return large structures get the address |
b18135da | 138 | to place the wanted value from a hidden parameter. */ |
ea76e85d RS |
139 | |
140 | #undef PCC_STATIC_STRUCT_RETURN | |
141 | #undef STRUCT_VALUE_REGNUM | |
ea76e85d | 142 | #define STRUCT_VALUE 0 |
b18135da | 143 | #define STRUCT_VALUE_INCOMING 0 |
ea76e85d RS |
144 | |
145 | /* Specify how to pad function arguments. | |
146 | Arguments are not padded at all; the stack is kept aligned on long | |
147 | boundaries. */ | |
148 | ||
149 | #define FUNCTION_ARG_PADDING(mode, size) none | |
150 | ||
ea76e85d RS |
151 | /* The definition of this macro imposes a limit on the size of |
152 | an aggregate object which can be treated as if it were a scalar | |
b18135da | 153 | object. */ |
ea76e85d RS |
154 | |
155 | #define MAX_FIXED_MODE_SIZE BITS_PER_WORD | |
156 | ||
157 | /* The definition of this macro implies that there are cases where | |
158 | a scalar value cannot be returned in registers. | |
159 | For Apollo, anything larger than one integer register is returned | |
160 | using the structure-value mechanism, i.e. objects of DFmode are | |
161 | returned that way. */ | |
162 | ||
163 | #define RETURN_IN_MEMORY(type) \ | |
e14fa9c4 DE |
164 | (TYPE_MODE (type) == BLKmode \ |
165 | || GET_MODE_SIZE (TYPE_MODE (type)) > UNITS_PER_WORD) | |
ea76e85d | 166 | |
b18135da RS |
167 | /* In order to link with Apollo libraries, we can't prefix external |
168 | symbols with an underscore. */ | |
169 | ||
170 | #undef USER_LABEL_PREFIX | |
171 | ||
172 | /* Use a prefix for local labels, just to be on the save side. */ | |
173 | ||
174 | #undef LOCAL_LABEL_PREFIX | |
175 | #define LOCAL_LABEL_PREFIX "." | |
176 | ||
177 | /* Use a register prefix to avoid clashes with external symbols (classic | |
178 | example: `extern char PC;' in termcap). */ | |
179 | ||
180 | #undef REGISTER_PREFIX | |
181 | #define REGISTER_PREFIX "%" | |
182 | ||
183 | /* In the machine description we can't use %R, because it will not be seen | |
184 | by ASM_FPRINTF. (Isn't that a design bug?). */ | |
185 | ||
186 | #undef REGISTER_PREFIX_MD | |
187 | #define REGISTER_PREFIX_MD "%%" | |
188 | ||
189 | /* config/m68k.md has an explicit reference to the program counter, | |
190 | prefix this by the register prefix. */ | |
191 | ||
192 | #define ASM_RETURN_CASE_JUMP return "jmp %%pc@(2,%0:w)" | |
ea76e85d | 193 | |
ea76e85d | 194 | |
b18135da | 195 | /* Here are the new register names. */ |
ea76e85d | 196 | |
b18135da RS |
197 | #undef REGISTER_NAMES |
198 | #ifndef SUPPORT_SUN_FPA | |
199 | #define REGISTER_NAMES \ | |
200 | {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \ | |
201 | "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp", \ | |
202 | "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7" } | |
203 | #else /* SUPPORTED_SUN_FPA */ | |
204 | #define REGISTER_NAMES \ | |
205 | {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \ | |
206 | "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp", \ | |
207 | "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7", \ | |
208 | "%fpa0", "%fpa1", "%fpa2", "%fpa3", "%fpa4", "%fpa5", "%fpa6", "%fpa7", \ | |
209 | "%fpa8", "%fpa9", "%fpa10", "%fpa11", "%fpa12", "%fpa13", "%fpa14", "%fpa15", \ | |
210 | "%fpa16", "%fpa17", "%fpa18", "%fpa19", "%fpa20", "%fpa21", "%fpa22", "%fpa23", \ | |
211 | "%fpa24", "%fpa25", "%fpa26", "%fpa27", "%fpa28", "%fpa29", "%fpa30", "%fpa31" } | |
212 | #endif /* defined SUPPORT_SUN_FPA */ |