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1.1 root 1: /* Definitions of target machine for GNU compiler. ISI 68000/68020 version.
2: Intended only for use with GAS, and not ISI's assembler, which is buggy
3: Copyright (C) 1988 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: #include "m68k/m68k.h"
22:
23: /* See m68k.h. 7 means 68020 with 68881. */
24: #ifndef TARGET_DEFAULT
25: #define TARGET_DEFAULT 7
26: #endif
27:
28: #if TARGET_DEFAULT & 2
29: /* Define __HAVE_68881__ in preprocessor, unless -msoft-float is specified.
30: This will control the use of inline 68881 insns in certain macros. */
31:
32: #define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__}"
33:
34: /* If the 68881 is used, link must load libmc.a instead of libc.a */
35:
36: #define LIB_SPEC "%{msoft-float:%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}} \
37: %{!msoft-float:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} \
38: %{g:-lg}"
39:
40: #else
41: /* Define __HAVE_68881__ in preprocessor if -m68881 is specified.
42: This will control the use of inline 68881 insns in certain macros. */
43:
44: #define CPP_SPEC "%{m68881:-D__HAVE_68881__}"
45:
46: /* If the 68881 is used, link must load libmc.a instead of libc.a */
47:
48: #define LIB_SPEC "%{!m68881:%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}} \
49: %{m68881:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} \
50: %{g:-lg}"
51: #endif
52:
53: /* Names to predefine in the preprocessor for this target machine. */
54:
55: #define CPP_PREDEFINES "-Dunix -Dmc68000 -Dis68k"
56:
57: /* This is BSD, so it wants DBX format. */
58:
59: #define DBX_DEBUGGING_INFO
60:
61: /* Override parts of m68k.h to fit the ISI 68k machine. */
62:
63: #undef FUNCTION_VALUE
64: #undef LIBCALL_VALUE
65: #undef FUNCTION_VALUE_REGNO_P
66: #undef NEEDS_UNTYPED_CALL
67: #undef ASM_FILE_START
68:
69: /* Every structure or union's size must be a multiple of 2 bytes. */
70:
71: #define STRUCTURE_SIZE_BOUNDARY 16
72:
73: /* If TARGET_68881, return SF and DF values in f0 instead of d0. */
74:
75: #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
76:
77: #define LIBCALL_VALUE(MODE) \
78: gen_rtx (REG, (MODE), ((TARGET_68881 && ((MODE) == SFmode || (MODE) == DFmode)) ? 16 : 0))
79:
80: /* 1 if N is a possible register number for a function value.
81: D0 may be used, and F0 as well if -m68881 is specified. */
82:
83: #define FUNCTION_VALUE_REGNO_P(N) \
84: ((N) == 0 || (TARGET_68881 && (N) == 16))
85:
86: /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for
87: more than one register. */
88:
89: #define NEEDS_UNTYPED_CALL 1
90:
91: /* Also output something to cause the correct _doprnt to be loaded. */
92: #define ASM_FILE_START(FILE) fprintf (FILE, "#NO_APP\n%s\n", TARGET_68881 ? ".globl fltused" : "")
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