1 /* Definitions of target machine for GNU compiler, for MIPS NetBSD systems.
2 Copyright (C) 1993-2023 Free Software Foundation, Inc.
3
4 This file is part of GCC.
5
6 GCC 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 3, or (at your option)
9 any later version.
10
11 GCC 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 GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
19
20
21 /* Define default target values. */
22
23 #define TARGET_OS_CPP_BUILTINS() \
24 do \
25 { \
26 NETBSD_OS_CPP_BUILTINS_ELF(); \
27 builtin_define ("__NO_LEADING_UNDERSCORES__"); \
28 builtin_define ("__GP_SUPPORT__"); \
29 if (TARGET_LONG64) \
30 builtin_define ("__LONG64"); \
31 \
32 if (TARGET_ABICALLS) \
33 builtin_define ("__ABICALLS__"); \
34 \
35 if (mips_abi == ABI_32) \
36 builtin_define ("__mips_o32"); \
37 else if (mips_abi == ABI_EABI) \
38 builtin_define ("__mips_eabi"); \
39 else if (mips_abi == ABI_N32) \
40 builtin_define ("__mips_n32"); \
41 else if (mips_abi == ABI_64) \
42 builtin_define ("__mips_n64"); \
43 else if (mips_abi == ABI_O64) \
44 builtin_define ("__mips_o64"); \
45 } \
46 while (0)
47
48 /* The generic MIPS TARGET_CPU_CPP_BUILTINS are incorrect for NetBSD.
49 Specifically, they define too many namespace-invasive macros. Override
50 them here. Note this is structured for easy comparison to the version
51 in mips.h.
52
53 FIXME: This probably isn't the best solution. But in the absence
54 of something better, it will have to do, for now. */
55
56 #undef TARGET_CPU_CPP_BUILTINS
57 #define TARGET_CPU_CPP_BUILTINS() \
58 do \
59 { \
60 builtin_assert ("cpu=mips"); \
61 builtin_define ("__mips__"); \
62 builtin_define ("_mips"); \
63 \
64 /* No _R3000 or _R4000. */ \
65 if (TARGET_64BIT) \
66 builtin_define ("__mips64"); \
67 \
68 if (TARGET_FLOAT64) \
69 builtin_define ("__mips_fpr=64"); \
70 else \
71 builtin_define ("__mips_fpr=32"); \
72 \
73 if (TARGET_MIPS16) \
74 builtin_define ("__mips16"); \
75 \
76 MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info); \
77 MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info); \
78 \
79 if (ISA_MIPS1) \
80 builtin_define ("__mips=1"); \
81 else if (ISA_MIPS2) \
82 builtin_define ("__mips=2"); \
83 else if (ISA_MIPS3) \
84 builtin_define ("__mips=3"); \
85 else if (ISA_MIPS4) \
86 builtin_define ("__mips=4"); \
87 else if (mips_isa >= MIPS_ISA_MIPS32 \
88 && mips_isa < MIPS_ISA_MIPS64) \
89 builtin_define ("__mips=32"); \
90 else if (mips_isa >= MIPS_ISA_MIPS64) \
91 builtin_define ("__mips=64"); \
92 if (mips_isa_rev > 0) \
93 builtin_define_with_int_value ("__mips_isa_rev", \
94 mips_isa_rev); \
95 \
96 if (TARGET_HARD_FLOAT) \
97 builtin_define ("__mips_hard_float"); \
98 else if (TARGET_SOFT_FLOAT) \
99 builtin_define ("__mips_soft_float"); \
100 \
101 if (TARGET_SINGLE_FLOAT) \
102 builtin_define ("__mips_single_float"); \
103 \
104 if (TARGET_BIG_ENDIAN) \
105 builtin_define ("__MIPSEB__"); \
106 else \
107 builtin_define ("__MIPSEL__"); \
108 \
109 /* No language dialect defines. */ \
110 \
111 /* ABIs handled in TARGET_OS_CPP_BUILTINS. */ \
112 } \
113 while (0)
114
115
116 /* Extra specs we need. */
117 #undef SUBTARGET_EXTRA_SPECS
118 #define SUBTARGET_EXTRA_SPECS \
119 { "netbsd_cpp_spec", NETBSD_CPP_SPEC }, \
120 { "netbsd_link_spec", NETBSD_LINK_SPEC_ELF }, \
121 { "netbsd_entry_point", NETBSD_ENTRY_POINT },
122
123 /* Provide a SUBTARGET_CPP_SPEC appropriate for NetBSD. */
124
125 #undef SUBTARGET_CPP_SPEC
126 #define SUBTARGET_CPP_SPEC "%(netbsd_cpp_spec)"
127
128 /* Provide a LINK_SPEC appropriate for a NetBSD/mips target.
129 This is a copy of LINK_SPEC from <netbsd-elf.h> tweaked for
130 the MIPS target. */
131
132 #undef LINK_SPEC
133 #define LINK_SPEC \
134 "%{EL:-m elf32lmip} \
135 %{EB:-m elf32bmip} \
136 %(endian_spec) \
137 %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32} %{mips32r2} \
138 %{mips32r6} %{mips64} %{mips64r6} \
139 %(netbsd_link_spec)"
140
141 #define NETBSD_ENTRY_POINT "__start"
142
143 #undef SUBTARGET_ASM_SPEC
144 #define SUBTARGET_ASM_SPEC \
145 "%{!mno-abicalls: \
146 %{!fno-PIC:%{!fno-pic:-KPIC}}}"
147
148
149 /* -G is incompatible with -KPIC which is the default, so only allow objects
150 in the small data section if the user explicitly asks for it. */
151
152 #undef MIPS_DEFAULT_GVALUE
153 #define MIPS_DEFAULT_GVALUE 0
154
155
156 #undef ASM_FINAL_SPEC
157 #undef SET_ASM_OP
158
159
160 /* NetBSD hasn't historically provided _flush_cache(), but rather
161 _cacheflush(), which takes the same arguments as the former. */
162 #undef CACHE_FLUSH_FUNC
163 #define CACHE_FLUSH_FUNC "_cacheflush"
164
165
166 /* Make gcc agree with <machine/ansi.h> */
167
168 #undef WCHAR_TYPE
169 #define WCHAR_TYPE "int"
170
171 #undef WCHAR_TYPE_SIZE
172 #define WCHAR_TYPE_SIZE 32
173
174 #undef WINT_TYPE
175 #define WINT_TYPE "int"