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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
1.1.1.3 ! root 19: the Free Software Foundation, 59 Temple Place - Suite 330,
! 20: Boston, MA 02111-1307, USA. */
1.1 root 21:
22: #include "m68k/m68k.h"
23:
24: /* See m68k.h. 7 means 68020 with 68881. */
25: #ifndef TARGET_DEFAULT
26: #define TARGET_DEFAULT 7
27: #endif
28:
29: #if TARGET_DEFAULT & 2
30: /* Define __HAVE_68881__ in preprocessor, unless -msoft-float is specified.
31: This will control the use of inline 68881 insns in certain macros. */
32:
33: #define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__}"
34:
1.1.1.2 root 35: /* If the 68881 is used, link must load libmc.a before libc.a. */
1.1 root 36:
1.1.1.2 root 37: #define LIB_SPEC "%{!msoft-float:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} \
38: %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} %{g:-lg}"
1.1 root 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:
1.1.1.2 root 48: #define LIB_SPEC "%{m68881:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} \
49: %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} %{g:-lg}"
1.1 root 50: #endif
51:
52: /* Names to predefine in the preprocessor for this target machine. */
53:
1.1.1.2 root 54: #define CPP_PREDEFINES "-Dunix -Dmc68000 -Dis68k -Asystem(unix) -Asystem(bsd) -Acpu(m68k) -Amachine(m68k)"
1.1 root 55:
56: /* This is BSD, so it wants DBX format. */
57:
58: #define DBX_DEBUGGING_INFO
59:
60: /* Override parts of m68k.h to fit the ISI 68k machine. */
61:
62: #undef FUNCTION_VALUE
63: #undef LIBCALL_VALUE
64: #undef FUNCTION_VALUE_REGNO_P
65: #undef NEEDS_UNTYPED_CALL
66: #undef ASM_FILE_START
67:
68: /* Every structure or union's size must be a multiple of 2 bytes. */
69:
70: #define STRUCTURE_SIZE_BOUNDARY 16
71:
72: /* If TARGET_68881, return SF and DF values in f0 instead of d0. */
73:
74: #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
75:
76: #define LIBCALL_VALUE(MODE) \
77: gen_rtx (REG, (MODE), ((TARGET_68881 && ((MODE) == SFmode || (MODE) == DFmode)) ? 16 : 0))
78:
79: /* 1 if N is a possible register number for a function value.
80: D0 may be used, and F0 as well if -m68881 is specified. */
81:
82: #define FUNCTION_VALUE_REGNO_P(N) \
83: ((N) == 0 || (TARGET_68881 && (N) == 16))
84:
85: /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for
86: more than one register. */
87:
88: #define NEEDS_UNTYPED_CALL 1
89:
90: /* Also output something to cause the correct _doprnt to be loaded. */
91: #define ASM_FILE_START(FILE) fprintf (FILE, "#NO_APP\n%s\n", TARGET_68881 ? ".globl fltused" : "")
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