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1.1 root 1: /* Definitions of target machine Motorola Delta 68k using GAS
2: for GNU Compiler.
3: Copyright (C) 1994 Free Software Foundation, Inc.
4:
5: This file is part of GNU CC.
6:
7: GNU CC 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 2, or (at your option)
10: any later version.
11:
12: GNU CC 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 GNU CC; see the file COPYING. If not, write to
19: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
20:
21:
22: /* Just in case someone asks */
23: #define USE_GAS
24:
25: #include "m68k/m68k.h"
26:
27: /* See m68k.h. 7 means 68020 with 68881,
28: 7 & 01400 means optimize for 68040 but allow execution on 68020. */
29: #undef TARGET_DEFAULT
30: #define TARGET_DEFAULT (7 & 01400)
31:
32: /* NYI: FP= is equivalent to -msoft-float
33: We use /lib/libp/lib* when profiling.
34:
35: NYI: if FP=M68881U library is -lc881u
36: NYI: if FP= library is -lc.
37: Default for us: FP=M68881 library is -lc881 */
38: #undef LIB_SPEC
39: #define LIB_SPEC "%{!shlib:%{p:-L/usr/lib/libp} %{pg:-L/usr/lib/libp} -lc881}"
40:
41: #undef CPP_SPEC
42: #define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__}"
43:
44: /* Shared libraries need to use crt0s.o */
45: #undef STARTFILE_SPEC
46: #define STARTFILE_SPEC \
47: "%{!shlib:%{pg:mcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}\
48: %{shlib:crt0s.o%s shlib.ifile%s} "
49:
50: /* -m68000 requires special flags to the assembler. */
51: #define ASM_SPEC \
52: "%{m68000:-mc68000}%{mc68000:-mc68000}%{!mc68000:%{!m68000:-mc68020}}"
53:
54: /* Generate calls to memcpy, memcmp and memset. */
55: #define TARGET_MEM_FUNCTIONS
56:
57: /* size_t is unsigned int. */
58: #define SIZE_TYPE "unsigned int"
59:
60: /* Every structure or union's size must be a multiple of 2 bytes. */
61: #define STRUCTURE_SIZE_BOUNDARY 16
62:
63: /* man cpp on the Delta says pcc predefines "m68k", "unix", and "sysV68",
64: and experimentation validates this. -jla */
65: #define CPP_PREDEFINES "-Dm68k -Dunix -DsysV68"
66:
67: /* cpp has to support a #sccs directive for the /usr/include files */
68: #define SCCS_DIRECTIVE
69:
70: /* Make sure to use MIT syntax, not Motorola */
71: #undef MOTOROLA
72:
73: /* Use SDB style because gdb on the delta doesn't understand stabs. */
74: #define SDB_DEBUGGING_INFO
75:
76: /* Use a register prefix to avoid clashes with external symbols (classic
77: example: `extern char PC;' in termcap). */
78: #undef REGISTER_PREFIX
79: #define REGISTER_PREFIX "%"
80:
81: /* In the machine description we can't use %R, because it will not be seen
82: by ASM_FPRINTF. (Isn't that a design bug?). */
83: #undef REGISTER_PREFIX_MD
84: #define REGISTER_PREFIX_MD "%%"
85:
86: /* The file command should always begin the output. */
87: #undef ASM_FILE_START
88: #define ASM_FILE_START(FILE) \
89: { \
90: fprintf (FILE, "%s", ASM_APP_OFF); \
91: output_file_directive ((FILE), main_input_filename); \
92: }
93:
94: /* Undefining these will allow `output_file_directive' (in toplev.c)
95: to default to the right thing. */
96: #undef ASM_OUTPUT_SOURCE_FILENAME
97: #undef ASM_OUTPUT_MAIN_SOURCE_FILENAME
98:
99: #undef REGISTER_NAMES
100: #define REGISTER_NAMES \
101: {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \
102: "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp", \
103: "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7" }
104:
105: /* Define how to jump to variable address from dispatch table of
106: relative addresses, for m68k.md insn. Note the use of 2 '%'
107: chars to output one. */
108: #define ASM_RETURN_CASE_JUMP return "jmp %%pc@(2,%0:w)"
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