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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 before libc.a. */
35:
36: #define LIB_SPEC "%{!msoft-float:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} \
37: %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} %{g:-lg}"
38:
39: #else
40: /* Define __HAVE_68881__ in preprocessor if -m68881 is specified.
41: This will control the use of inline 68881 insns in certain macros. */
42:
43: #define CPP_SPEC "%{m68881:-D__HAVE_68881__}"
44:
45: /* If the 68881 is used, link must load libmc.a instead of libc.a */
46:
47: #define LIB_SPEC "%{m68881:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} \
48: %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} %{g:-lg}"
49: #endif
50:
51: /* Names to predefine in the preprocessor for this target machine. */
52:
53: #define CPP_PREDEFINES "-Dunix -Dmc68000 -Dis68k -Asystem(unix) -Asystem(bsd) -Acpu(m68k) -Amachine(m68k)"
54:
55: /* This is BSD, so it wants DBX format. */
56:
57: #define DBX_DEBUGGING_INFO
58:
59: /* Override parts of m68k.h to fit the ISI 68k machine. */
60:
61: #undef FUNCTION_VALUE
62: #undef LIBCALL_VALUE
63: #undef FUNCTION_VALUE_REGNO_P
64: #undef NEEDS_UNTYPED_CALL
65: #undef ASM_FILE_START
66:
67: /* Every structure or union's size must be a multiple of 2 bytes. */
68:
69: #define STRUCTURE_SIZE_BOUNDARY 16
70:
71: /* If TARGET_68881, return SF and DF values in f0 instead of d0. */
72:
73: #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
74:
75: #define LIBCALL_VALUE(MODE) \
76: gen_rtx (REG, (MODE), ((TARGET_68881 && ((MODE) == SFmode || (MODE) == DFmode)) ? 16 : 0))
77:
78: /* 1 if N is a possible register number for a function value.
79: D0 may be used, and F0 as well if -m68881 is specified. */
80:
81: #define FUNCTION_VALUE_REGNO_P(N) \
82: ((N) == 0 || (TARGET_68881 && (N) == 16))
83:
84: /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for
85: more than one register. */
86:
87: #define NEEDS_UNTYPED_CALL 1
88:
89: /* Also output something to cause the correct _doprnt to be loaded. */
90: #define ASM_FILE_START(FILE) fprintf (FILE, "#NO_APP\n%s\n", TARGET_68881 ? ".globl fltused" : "")
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