![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to apollo68.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple XNU] / GNUtools / cc / config / m68k|
Return to apollo68.h CVS log | Up to [Apple XNU] / GNUtools / cc / config / m68k |
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
18: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
19:
20: #include "m68k/m68k.h"
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 -Asystem(unix) -Acpu(m68k) -Amachine(m68k)"
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:
93: /* -m68000 requires special flags to the assembler. */
94:
95: #define ASM_SPEC \
96: "%{m68000:-mc68010}%{mc68000:-mc68010}%{!mc68000:%{!m68000:-mc68020}}"
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:
122: /* We have atexit(2). So C++ can use it for global destructors. */
123:
124: #if 0 /* [email protected] says people are still using sr10.2
125: and it does not support atexit. */
126: #define HAVE_ATEXIT
127: #endif
128:
129: /* Every structure or union's size must be a multiple of 2 bytes. */
130:
131: #define STRUCTURE_SIZE_BOUNDARY 16
132:
133: /* Boundary (in *bits*) on which stack pointer should be aligned. */
134: #undef STACK_BOUNDARY
135: #define STACK_BOUNDARY 32
136:
137: /* Functions which return large structures get the address
138: to place the wanted value from a hidden parameter. */
139:
140: #undef PCC_STATIC_STRUCT_RETURN
141: #undef STRUCT_VALUE_REGNUM
142: #define STRUCT_VALUE 0
143: #define STRUCT_VALUE_INCOMING 0
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:
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
153: object. */
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) \
164: (TYPE_MODE (type) == BLKmode \
165: || GET_MODE_SIZE (TYPE_MODE (type)) > UNITS_PER_WORD)
166:
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)"
193:
194:
195: /* Here are the new register names. */
196:
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 */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.