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1.1 root 1: /* Definitions of target machine for GNU compiler. Apollo 680X0 version.
2: Copyright (C) 1989,1992 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 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
1.1.1.4 ! root 18: the Free Software Foundation, 59 Temple Place - Suite 330,
! 19: Boston, MA 02111-1307, USA. */
1.1 root 20:
21: #include "m68k/m68k.h"
22:
23: /* This symbol may be tested in other files for special Apollo handling */
24:
25: #define TM_APOLLO
26:
27: /* See m68k.h. 7 means 68020 with 68881. */
28:
29: #ifndef TARGET_DEFAULT
30: #define TARGET_DEFAULT 7
31: #endif
32:
33: /* Target switches for the Apollo is the same as in m68k.h, except
34: there is no Sun FPA. */
35:
36: #undef TARGET_SWITCHES
37: #define TARGET_SWITCHES \
38: { { "68020", 5}, \
39: { "c68020", 5}, \
40: { "68881", 2}, \
41: { "bitfield", 4}, \
42: { "68000", -5}, \
43: { "c68000", -5}, \
44: { "soft-float", -0102}, \
45: { "nobitfield", -4}, \
46: { "rtd", 8}, \
47: { "nortd", -8}, \
48: { "short", 040}, \
49: { "noshort", -040}, \
50: { "", TARGET_DEFAULT}}
51:
52: /* Define __HAVE_68881__ in preprocessor,
53: according to the -m flags.
54: This will control the use of inline 68881 insns in certain macros.
55: Also inform the program which CPU this is for. */
56:
57: #if TARGET_DEFAULT & 02
58:
59: /* -m68881 is the default */
60: #define CPP_SPEC \
61: "%{!msoft-float:%{mfpa:-D__HAVE_FPA__ }%{!mfpa:-D__HAVE_68881__ }}\
62: %{!ansi:%{m68000:-Dmc68010 }%{mc68000:-Dmc68010 }%{!mc68000:%{!m68000:-Dmc68020 }}\
63: %{!ansi:-D_APOLLO_SOURCE}}"
64:
65: #else
66:
67: /* -msoft-float is the default */
68: #define CPP_SPEC \
69: "%{m68881:-D__HAVE_68881__ }%{mfpa:-D__HAVE_FPA__ }\
70: %{!ansi:%{m68000:-Dmc68010 }%{mc68000:-Dmc68010 }%{!mc68000:%{!m68000:-Dmc68020 }}\
71: %{!ansi:-D_APOLLO_SOURCE}}"
72:
73: #endif
74:
75: /* Names to predefine in the preprocessor for this target machine. */
76: /* These are the ones defined by Apollo, plus mc68000 for uniformity with
77: GCC on other 68000 systems. */
78:
1.1.1.2 root 79: #define CPP_PREDEFINES "-Dapollo -Daegis -Dunix -Asystem(unix) -Acpu(m68k) -Amachine(m68k)"
1.1 root 80:
81: /* cpp has to support a #sccs directive for the /usr/include files */
82:
83: #define SCCS_DIRECTIVE
84:
85: /* Allow #ident but output nothing for it. */
86:
87: #define IDENT_DIRECTIVE
88: #define ASM_OUTPUT_IDENT(FILE, NAME)
89:
90: /* Allow dollarsigns in identifiers */
91:
92: #define DOLLARS_IN_IDENTIFIERS 2
93:
94: /* -m68000 requires special flags to the assembler. */
95:
96: #define ASM_SPEC \
97: "%{m68000:-mc68010}%{mc68000:-mc68010}%{!mc68000:%{!m68000:-mc68020}}"
98:
99: /* STARTFILE_SPEC
100: Note that includes knowledge of the default specs for gcc, ie. no
101: args translates to the same effect as -m68881 */
102:
103: #if TARGET_DEFAULT & 2
104: /* -m68881 is the default */
105: #define STARTFILE_SPEC \
106: "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}"
107: #else
108: /* -msoft-float is the default */
109: #define STARTFILE_SPEC \
110: "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}"
111: #endif
112:
113: /* Specify library to handle `-a' basic block profiling. */
114:
115: #define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} \
116: %{a:/usr/lib/bb_link.o} "
117:
118: /* Debugging is not supported yet */
119:
120: #undef DBX_DEBUGGING_INFO
121: #undef SDB_DEBUGGING_INFO
122:
123: /* We have atexit(2). So C++ can use it for global destructors. */
124:
125: #if 0 /* [email protected] says people are still using sr10.2
126: and it does not support atexit. */
127: #define HAVE_ATEXIT
128: #endif
129:
130: /* Every structure or union's size must be a multiple of 2 bytes. */
131:
132: #define STRUCTURE_SIZE_BOUNDARY 16
133:
134: /* Boundary (in *bits*) on which stack pointer should be aligned. */
135: #undef STACK_BOUNDARY
136: #define STACK_BOUNDARY 32
137:
138: /* Functions which return large structures get the address
139: to place the wanted value from a hidden parameter. */
140:
141: #undef PCC_STATIC_STRUCT_RETURN
142: #undef STRUCT_VALUE_REGNUM
143: #define STRUCT_VALUE 0
144: #define STRUCT_VALUE_INCOMING 0
145:
146: /* Specify how to pad function arguments.
147: Arguments are not padded at all; the stack is kept aligned on long
148: boundaries. */
149:
150: #define FUNCTION_ARG_PADDING(mode, size) none
151:
152: /* The definition of this macro imposes a limit on the size of
153: an aggregate object which can be treated as if it were a scalar
154: object. */
155:
156: #define MAX_FIXED_MODE_SIZE BITS_PER_WORD
157:
158: /* The definition of this macro implies that there are cases where
159: a scalar value cannot be returned in registers.
160: For Apollo, anything larger than one integer register is returned
161: using the structure-value mechanism, i.e. objects of DFmode are
162: returned that way. */
163:
164: #define RETURN_IN_MEMORY(type) \
165: (TYPE_MODE (type) == BLKmode \
166: || GET_MODE_SIZE (TYPE_MODE (type)) > UNITS_PER_WORD)
167:
168: /* In order to link with Apollo libraries, we can't prefix external
169: symbols with an underscore. */
170:
171: #undef USER_LABEL_PREFIX
172:
173: /* Use a prefix for local labels, just to be on the save side. */
174:
175: #undef LOCAL_LABEL_PREFIX
176: #define LOCAL_LABEL_PREFIX "."
177:
178: /* Use a register prefix to avoid clashes with external symbols (classic
179: example: `extern char PC;' in termcap). */
180:
181: #undef REGISTER_PREFIX
182: #define REGISTER_PREFIX "%"
183:
184: /* config/m68k.md has an explicit reference to the program counter,
185: prefix this by the register prefix. */
186:
187: #define ASM_RETURN_CASE_JUMP return "jmp %%pc@(2,%0:w)"
188:
189:
190: /* Here are the new register names. */
191:
192: #undef REGISTER_NAMES
193: #ifndef SUPPORT_SUN_FPA
194: #define REGISTER_NAMES \
195: {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \
196: "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp", \
197: "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7" }
198: #else /* SUPPORTED_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: "%fpa0", "%fpa1", "%fpa2", "%fpa3", "%fpa4", "%fpa5", "%fpa6", "%fpa7", \
204: "%fpa8", "%fpa9", "%fpa10", "%fpa11", "%fpa12", "%fpa13", "%fpa14", "%fpa15", \
205: "%fpa16", "%fpa17", "%fpa18", "%fpa19", "%fpa20", "%fpa21", "%fpa22", "%fpa23", \
206: "%fpa24", "%fpa25", "%fpa26", "%fpa27", "%fpa28", "%fpa29", "%fpa30", "%fpa31" }
207: #endif /* defined SUPPORT_SUN_FPA */
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