]>
Commit | Line | Data |
---|---|---|
bcf684c7 | 1 | /* Definitions of target machine for GNU compiler, for MMIX. |
cbe34bb5 | 2 | Copyright (C) 2000-2017 Free Software Foundation, Inc. |
bcf684c7 HPN |
3 | Contributed by Hans-Peter Nilsson (hp@bitrange.com) |
4 | ||
c583c5c3 | 5 | This file is part of GCC. |
bcf684c7 | 6 | |
c583c5c3 | 7 | GCC is free software; you can redistribute it and/or modify |
bcf684c7 | 8 | it under the terms of the GNU General Public License as published by |
2f83c7d6 | 9 | the Free Software Foundation; either version 3, or (at your option) |
bcf684c7 HPN |
10 | any later version. |
11 | ||
c583c5c3 | 12 | GCC is distributed in the hope that it will be useful, |
bcf684c7 HPN |
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 | |
2f83c7d6 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
bcf684c7 HPN |
20 | |
21 | #ifndef GCC_MMIX_H | |
22 | #define GCC_MMIX_H | |
23 | ||
24 | /* First, some local helper macros. Note that the "default" value of | |
25 | FIXED_REGISTERS, CALL_USED_REGISTERS, REG_ALLOC_ORDER and | |
26 | REG_CLASS_CONTENTS depend on these values. */ | |
27 | #define MMIX_RESERVED_GNU_ARG_0_REGNUM 231 | |
28 | #define MMIX_FIRST_ARG_REGNUM \ | |
29 | (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 16) | |
30 | #define MMIX_FIRST_INCOMING_ARG_REGNUM \ | |
31 | (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 0) | |
32 | #define MMIX_MAX_ARGS_IN_REGS 16 | |
33 | ||
34 | /* FIXME: This one isn't fully implemented yet. Return values larger than | |
35 | one register are passed by reference in MMIX_STRUCT_VALUE_REGNUM by the | |
36 | caller, except for return values of type "complex". */ | |
37 | #define MMIX_MAX_REGS_FOR_VALUE 16 | |
38 | #define MMIX_RETURN_VALUE_REGNUM \ | |
39 | (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 15) | |
40 | #define MMIX_OUTGOING_RETURN_VALUE_REGNUM \ | |
41 | (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 0) | |
42 | #define MMIX_STRUCT_VALUE_REGNUM 251 | |
43 | #define MMIX_STATIC_CHAIN_REGNUM 252 | |
44 | #define MMIX_FRAME_POINTER_REGNUM 253 | |
45 | #define MMIX_STACK_POINTER_REGNUM 254 | |
46 | #define MMIX_LAST_GENERAL_REGISTER 255 | |
91312b81 | 47 | #define MMIX_INCOMING_RETURN_ADDRESS_REGNUM MMIX_rJ_REGNUM |
bcf684c7 | 48 | #define MMIX_HIMULT_REGNUM 258 |
34116c2a | 49 | #define MMIX_REMAINDER_REGNUM MMIX_rR_REGNUM |
bcf684c7 | 50 | #define MMIX_ARG_POINTER_REGNUM 261 |
957ec0f9 | 51 | #define MMIX_rO_REGNUM 262 |
1f2641b6 | 52 | #define MMIX_LAST_STACK_REGISTER_REGNUM 31 |
bcf684c7 HPN |
53 | |
54 | /* Four registers; "ideally, these registers should be call-clobbered", so | |
55 | just grab a bunch of the common clobbered registers. FIXME: Last | |
56 | registers of return-value should be used, with an error if there's a | |
57 | return-value (that collides in size). */ | |
58 | #define MMIX_EH_RETURN_DATA_REGNO_START (MMIX_STRUCT_VALUE_REGNUM - 4) | |
59 | ||
60 | /* Try to keep the definitions from running away on their own. */ | |
61 | #if (MMIX_EH_RETURN_DATA_REGNO_START \ | |
62 | != MMIX_RESERVED_GNU_ARG_0_REGNUM + MMIX_MAX_ARGS_IN_REGS) | |
63 | #error MMIX register definition inconsistency | |
64 | #endif | |
65 | ||
66 | #if (MMIX_MAX_REGS_FOR_VALUE + MMIX_MAX_ARGS_IN_REGS > 32) | |
67 | #error MMIX parameters and return values bad, more than 32 registers | |
68 | #endif | |
69 | ||
70 | /* This chosen as "a call-clobbered hard register that is otherwise | |
71 | untouched by the epilogue". */ | |
72 | #define MMIX_EH_RETURN_STACKADJ_REGNUM MMIX_STATIC_CHAIN_REGNUM | |
73 | ||
bcf684c7 HPN |
74 | #define MMIX_FUNCTION_ARG_SIZE(MODE, TYPE) \ |
75 | ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) : int_size_in_bytes (TYPE)) | |
76 | ||
bcf684c7 HPN |
77 | /* Per-function machine data. This is normally an opaque type just |
78 | defined and used in the tm.c file, but we need to see the definition in | |
79 | mmix.md too. */ | |
d1b38208 | 80 | struct GTY(()) machine_function |
bcf684c7 | 81 | { |
bcf684c7 | 82 | int has_landing_pad; |
1f2641b6 | 83 | int highest_saved_stack_register; |
957ec0f9 | 84 | int in_prologue; |
bcf684c7 HPN |
85 | }; |
86 | ||
87 | /* For these target macros, there is no generic documentation here. You | |
88 | should read `Using and Porting GCC' for that. Only comments specific | |
89 | to the MMIX target are here. | |
90 | ||
91 | There are however references to the specific texinfo node (comments | |
92 | with "Node:"), so there should be little or nothing amiss. Probably | |
93 | the opposite, since we don't have to care about old littering and | |
94 | soon outdated generic comments. */ | |
95 | ||
96 | /* Node: Driver */ | |
97 | ||
bcf684c7 HPN |
98 | /* User symbols are in the same name-space as built-in symbols, but we |
99 | don't need the built-in symbols, so remove those and instead apply | |
100 | stricter operand checking. Don't warn when expanding insns. */ | |
101 | #define ASM_SPEC "-no-predefined-syms -x" | |
102 | ||
103 | /* Pass on -mset-program-start=N and -mset-data-start=M to the linker. | |
104 | Provide default program start 0x100 unless -mno-set-program-start. | |
4f1aac42 HPN |
105 | Don't do this if linking relocatably, with -r. For a final link, |
106 | produce mmo, unless ELF is requested or when linking relocatably. */ | |
bcf684c7 HPN |
107 | #define LINK_SPEC \ |
108 | "%{mset-program-start=*:--defsym __.MMIX.start..text=%*}\ | |
109 | %{mset-data-start=*:--defsym __.MMIX.start..data=%*}\ | |
110 | %{!mset-program-start=*:\ | |
4f1aac42 HPN |
111 | %{!mno-set-program-start:\ |
112 | %{!r:--defsym __.MMIX.start..text=0x100}}}\ | |
113 | %{!melf:%{!r:-m mmo}}%{melf|r:-m elf64mmix}" | |
bcf684c7 | 114 | |
bcf684c7 HPN |
115 | /* FIXME: There's no provision for profiling here. */ |
116 | #define STARTFILE_SPEC \ | |
117 | "crti%O%s crtbegin%O%s" | |
118 | ||
119 | #define ENDFILE_SPEC "crtend%O%s crtn%O%s" | |
120 | ||
121 | /* Node: Run-time Target */ | |
122 | ||
123 | /* Define __LONG_MAX__, since we're advised not to change glimits.h. */ | |
38e18619 HPN |
124 | #define TARGET_CPU_CPP_BUILTINS() \ |
125 | do \ | |
126 | { \ | |
127 | builtin_define ("__mmix__"); \ | |
128 | builtin_define ("__MMIX__"); \ | |
38e18619 HPN |
129 | if (TARGET_ABI_GNU) \ |
130 | builtin_define ("__MMIX_ABI_GNU__"); \ | |
131 | else \ | |
132 | builtin_define ("__MMIX_ABI_MMIXWARE__"); \ | |
133 | } \ | |
134 | while (0) | |
bcf684c7 | 135 | |
3e0f61ac | 136 | #define TARGET_DEFAULT \ |
6ff59fe7 | 137 | (MASK_BRANCH_PREDICT | MASK_BASE_ADDRESSES | MASK_USE_RETURN_INSN) |
bcf684c7 | 138 | |
bcf684c7 HPN |
139 | |
140 | /* Node: Per-Function Data */ | |
141 | #define INIT_EXPANDERS mmix_init_expanders () | |
142 | ||
143 | ||
144 | /* Node: Storage Layout */ | |
43a88a8c | 145 | /* I see no bit-field instructions. Anyway, the common order is from low |
bcf684c7 HPN |
146 | to high, as the power of two, hence little-endian. */ |
147 | #define BITS_BIG_ENDIAN 0 | |
148 | #define BYTES_BIG_ENDIAN 1 | |
149 | #define WORDS_BIG_ENDIAN 1 | |
150 | #define FLOAT_WORDS_BIG_ENDIAN 1 | |
bcf684c7 | 151 | #define UNITS_PER_WORD 8 |
bcf684c7 | 152 | |
bcf684c7 HPN |
153 | /* We need to align everything to 64 bits that can affect the alignment |
154 | of other types. Since address N is interpreted in MMIX as (N modulo | |
155 | access_size), we must align. */ | |
156 | #define PARM_BOUNDARY 64 | |
157 | #define STACK_BOUNDARY 64 | |
158 | #define FUNCTION_BOUNDARY 32 | |
159 | #define BIGGEST_ALIGNMENT 64 | |
160 | ||
161 | /* This one is only used in the ADA front end. */ | |
162 | #define MINIMUM_ATOMIC_ALIGNMENT 8 | |
163 | ||
164 | /* Copied from elfos.h. */ | |
165 | #define MAX_OFILE_ALIGNMENT (32768 * 8) | |
166 | ||
df8a1d28 | 167 | #define DATA_ABI_ALIGNMENT(TYPE, BASIC_ALIGN) \ |
bcf684c7 HPN |
168 | mmix_data_alignment (TYPE, BASIC_ALIGN) |
169 | ||
170 | #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \ | |
171 | mmix_constant_alignment (CONSTANT, BASIC_ALIGN) | |
172 | ||
173 | #define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \ | |
174 | mmix_local_alignment (TYPE, BASIC_ALIGN) | |
175 | ||
176 | /* Following other ports, this seems to most commonly be the word-size, | |
177 | so let's do that here too. */ | |
178 | #define EMPTY_FIELD_BOUNDARY 64 | |
179 | ||
180 | /* We chose to have this low solely for similarity with the alpha. It has | |
181 | nothing to do with passing the tests dg/c99-scope-2 and | |
182 | execute/align-1.c. Nothing. Though the tests seem wrong. Padding of | |
183 | the structure is automatically added to get alignment when needed if we | |
184 | set this to just byte-boundary. */ | |
185 | #define STRUCTURE_SIZE_BOUNDARY 8 | |
186 | ||
187 | /* The lower bits are ignored. */ | |
188 | #define STRICT_ALIGNMENT 1 | |
189 | ||
190 | ||
191 | /* Node: Type Layout */ | |
192 | ||
193 | /* It might seem more natural to have 64-bit ints on a 64-bit machine, | |
194 | but then an occasional MMIX programmer needs to know how to put a lot | |
195 | of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather | |
196 | than the "intuitive" char, short and int types. */ | |
197 | #define INT_TYPE_SIZE 32 | |
198 | #define SHORT_TYPE_SIZE 16 | |
199 | #define LONG_LONG_TYPE_SIZE 64 | |
200 | ||
201 | #define FLOAT_TYPE_SIZE 32 | |
202 | #define DOUBLE_TYPE_SIZE 64 | |
203 | #define LONG_DOUBLE_TYPE_SIZE 64 | |
204 | ||
205 | #define DEFAULT_SIGNED_CHAR 1 | |
206 | ||
bcf684c7 HPN |
207 | |
208 | /* Node: Register Basics */ | |
209 | /* We tell GCC about all 256 general registers, and we also include | |
957ec0f9 | 210 | rD, rE, rH, rJ, rR and rO (in that order) so we can describe what insns |
bcf684c7 HPN |
211 | clobber them. We use a faked register for the argument pointer. It is |
212 | always eliminated towards the frame-pointer or the stack-pointer, never | |
213 | output in assembly. Any fixed register would do for this, like $255, | |
214 | but future debugging is easier when using a separate register. It | |
215 | counts as a global register for pseudorandom reasons. */ | |
957ec0f9 | 216 | #define FIRST_PSEUDO_REGISTER 263 |
bcf684c7 HPN |
217 | |
218 | /* We treat general registers with no assigned purpose as fixed. The | |
219 | stack pointer, $254, is also fixed. Register $255 is referred to as a | |
220 | temporary register in the MMIX papers, and used as such in mmixal, so | |
221 | it should not be used as a stack pointer. We set it to fixed, and use | |
222 | it "manually" at times of despair. */ | |
223 | #define FIXED_REGISTERS \ | |
224 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
225 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
226 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
227 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
228 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
229 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
230 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
231 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
232 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
233 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
234 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
235 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
236 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
237 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
a824924d HPN |
238 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ |
239 | 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, \ | |
957ec0f9 | 240 | 1, 1, 0, 0, 0, 1, 1 \ |
bcf684c7 HPN |
241 | } |
242 | ||
243 | /* General registers are fixed and therefore "historically" marked | |
244 | call-used. (FIXME: This has changed). Registers $15..$31 are | |
245 | call-clobbered; we'll put arguments in $16 and up, and we need $15 for | |
246 | the MMIX register-stack "hole". */ | |
247 | #define CALL_USED_REGISTERS \ | |
248 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, \ | |
249 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
250 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
251 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
252 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
253 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
254 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
255 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
256 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
257 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
258 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
259 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
260 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
261 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
262 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
263 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, \ | |
957ec0f9 | 264 | 1, 1, 1, 1, 1, 1, 1 \ |
bcf684c7 HPN |
265 | } |
266 | ||
60e90d09 HPN |
267 | #define INCOMING_REGNO(OUT) mmix_opposite_regno (OUT, 0) |
268 | ||
269 | #define OUTGOING_REGNO(IN) mmix_opposite_regno (IN, 1) | |
bcf684c7 | 270 | |
957ec0f9 HPN |
271 | /* Defining LOCAL_REGNO is necessary in presence of prologue/epilogue, |
272 | else GCC will be confused that those registers aren't saved and | |
273 | restored. */ | |
274 | #define LOCAL_REGNO(REGNO) mmix_local_regno (REGNO) | |
bcf684c7 HPN |
275 | |
276 | /* Node: Allocation Order */ | |
277 | ||
278 | /* We should allocate registers from 0 to 31 by increasing number, because | |
279 | I think that's what people expect. Beyond that, just use | |
280 | call-clobbered global registers first, then call-clobbered special | |
281 | registers. Last, the fixed registers. */ | |
282 | #define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER \ | |
283 | { 0, 1, 2, 3, 4, 5, 6, 7, \ | |
284 | 8, 9, 10, 11, 12, 13, 14, 15, \ | |
285 | 16, 17, 18, 19, 20, 21, 22, 23, \ | |
286 | 24, 25, 26, 27, 28, 29, 30, 31, \ | |
287 | \ | |
288 | 252, 251, 250, 249, 248, 247, \ | |
bcf684c7 HPN |
289 | \ |
290 | 253, \ | |
291 | \ | |
292 | 258, 260, 259, \ | |
293 | \ | |
294 | 32, 33, 34, 35, 36, 37, 38, 39, \ | |
295 | 40, 41, 42, 43, 44, 45, 46, 47, \ | |
296 | 48, 49, 50, 51, 52, 53, 54, 55, \ | |
297 | 56, 57, 58, 59, 60, 61, 62, 63, \ | |
298 | 64, 65, 66, 67, 68, 69, 70, 71, \ | |
299 | 72, 73, 74, 75, 76, 77, 78, 79, \ | |
300 | 80, 81, 82, 83, 84, 85, 86, 87, \ | |
301 | 88, 89, 90, 91, 92, 93, 94, 95, \ | |
302 | 96, 97, 98, 99, 100, 101, 102, 103, \ | |
303 | 104, 105, 106, 107, 108, 109, 110, 111, \ | |
304 | 112, 113, 114, 115, 116, 117, 118, 119, \ | |
305 | 120, 121, 122, 123, 124, 125, 126, 127, \ | |
306 | 128, 129, 130, 131, 132, 133, 134, 135, \ | |
307 | 136, 137, 138, 139, 140, 141, 142, 143, \ | |
308 | 144, 145, 146, 147, 148, 149, 150, 151, \ | |
309 | 152, 153, 154, 155, 156, 157, 158, 159, \ | |
310 | 160, 161, 162, 163, 164, 165, 166, 167, \ | |
311 | 168, 169, 170, 171, 172, 173, 174, 175, \ | |
312 | 176, 177, 178, 179, 180, 181, 182, 183, \ | |
313 | 184, 185, 186, 187, 188, 189, 190, 191, \ | |
314 | 192, 193, 194, 195, 196, 197, 198, 199, \ | |
315 | 200, 201, 202, 203, 204, 205, 206, 207, \ | |
316 | 208, 209, 210, 211, 212, 213, 214, 215, \ | |
317 | 216, 217, 218, 219, 220, 221, 222, 223, \ | |
318 | 224, 225, 226, 227, 228, 229, 230, 231, \ | |
a824924d HPN |
319 | 232, 233, 234, 235, 236, 237, 238, 239, \ |
320 | 240, 241, 242, 243, 244, 245, 246, \ | |
321 | \ | |
957ec0f9 | 322 | 254, 255, 256, 257, 261, 262 \ |
bcf684c7 HPN |
323 | } |
324 | ||
325 | /* As a convenience, we put this nearby, for ease of comparison. | |
326 | First, call-clobbered registers in reverse order of assignment as | |
327 | parameters (also the top ones; not because they're parameters, but | |
328 | for continuity). | |
329 | ||
330 | Second, saved registers that go on the register-stack. | |
331 | ||
332 | Third, special registers rH, rR and rJ. They should not normally be | |
333 | allocated, but since they're call-clobbered, it is cheaper to use one | |
334 | of them than using a call-saved register for a call-clobbered use, | |
335 | assuming it is referenced a very limited number of times. Other global | |
336 | and fixed registers come next; they are never allocated. */ | |
337 | #define MMIX_GNU_ABI_REG_ALLOC_ORDER \ | |
3ec1b4cb | 338 | { 252, 251, 250, 249, 248, 247, 246, \ |
bcf684c7 | 339 | 245, 244, 243, 242, 241, 240, 239, 238, \ |
a824924d | 340 | 237, 236, 235, 234, 233, 232, 231, \ |
bcf684c7 HPN |
341 | \ |
342 | 0, 1, 2, 3, 4, 5, 6, 7, \ | |
343 | 8, 9, 10, 11, 12, 13, 14, 15, \ | |
344 | 16, 17, 18, 19, 20, 21, 22, 23, \ | |
345 | 24, 25, 26, 27, 28, 29, 30, 31, \ | |
346 | \ | |
347 | 253, \ | |
348 | \ | |
349 | 258, 260, 259, \ | |
350 | \ | |
351 | 32, 33, 34, 35, 36, 37, 38, 39, \ | |
352 | 40, 41, 42, 43, 44, 45, 46, 47, \ | |
353 | 48, 49, 50, 51, 52, 53, 54, 55, \ | |
354 | 56, 57, 58, 59, 60, 61, 62, 63, \ | |
355 | 64, 65, 66, 67, 68, 69, 70, 71, \ | |
356 | 72, 73, 74, 75, 76, 77, 78, 79, \ | |
357 | 80, 81, 82, 83, 84, 85, 86, 87, \ | |
358 | 88, 89, 90, 91, 92, 93, 94, 95, \ | |
359 | 96, 97, 98, 99, 100, 101, 102, 103, \ | |
360 | 104, 105, 106, 107, 108, 109, 110, 111, \ | |
361 | 112, 113, 114, 115, 116, 117, 118, 119, \ | |
362 | 120, 121, 122, 123, 124, 125, 126, 127, \ | |
363 | 128, 129, 130, 131, 132, 133, 134, 135, \ | |
364 | 136, 137, 138, 139, 140, 141, 142, 143, \ | |
365 | 144, 145, 146, 147, 148, 149, 150, 151, \ | |
366 | 152, 153, 154, 155, 156, 157, 158, 159, \ | |
367 | 160, 161, 162, 163, 164, 165, 166, 167, \ | |
368 | 168, 169, 170, 171, 172, 173, 174, 175, \ | |
369 | 176, 177, 178, 179, 180, 181, 182, 183, \ | |
370 | 184, 185, 186, 187, 188, 189, 190, 191, \ | |
371 | 192, 193, 194, 195, 196, 197, 198, 199, \ | |
372 | 200, 201, 202, 203, 204, 205, 206, 207, \ | |
373 | 208, 209, 210, 211, 212, 213, 214, 215, \ | |
374 | 216, 217, 218, 219, 220, 221, 222, 223, \ | |
a824924d HPN |
375 | 224, 225, 226, 227, 228, 229, 230, \ |
376 | \ | |
957ec0f9 | 377 | 254, 255, 256, 257, 261, 262 \ |
bcf684c7 HPN |
378 | } |
379 | ||
380 | /* The default one. */ | |
381 | #define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER | |
382 | ||
383 | /* Node: Values in Registers */ | |
384 | ||
385 | #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
386 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \ | |
387 | / UNITS_PER_WORD) | |
388 | ||
bcf684c7 HPN |
389 | /* Node: Leaf Functions */ |
390 | /* (empty) */ | |
391 | ||
392 | ||
393 | /* Node: Register Classes */ | |
394 | ||
395 | enum reg_class | |
3ec1b4cb HPN |
396 | { |
397 | NO_REGS, GENERAL_REGS, REMAINDER_REG, HIMULT_REG, | |
398 | SYSTEM_REGS, ALL_REGS, LIM_REG_CLASSES | |
399 | }; | |
bcf684c7 HPN |
400 | |
401 | #define N_REG_CLASSES (int) LIM_REG_CLASSES | |
402 | ||
403 | #define REG_CLASS_NAMES \ | |
404 | {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG", \ | |
405 | "SYSTEM_REGS", "ALL_REGS"} | |
406 | ||
407 | /* Note that the contents of each item is always 32 bits. */ | |
408 | #define REG_CLASS_CONTENTS \ | |
409 | {{0, 0, 0, 0, 0, 0, 0, 0, 0}, \ | |
410 | {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20}, \ | |
411 | {0, 0, 0, 0, 0, 0, 0, 0, 0x10}, \ | |
412 | {0, 0, 0, 0, 0, 0, 0, 0, 4}, \ | |
957ec0f9 HPN |
413 | {0, 0, 0, 0, 0, 0, 0, 0, 0x7f}, \ |
414 | {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x7f}} | |
bcf684c7 HPN |
415 | |
416 | #define REGNO_REG_CLASS(REGNO) \ | |
417 | ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \ | |
418 | || (REGNO) == MMIX_ARG_POINTER_REGNUM \ | |
419 | ? GENERAL_REGS \ | |
420 | : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG \ | |
421 | : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS) | |
422 | ||
423 | #define BASE_REG_CLASS GENERAL_REGS | |
424 | ||
425 | #define INDEX_REG_CLASS GENERAL_REGS | |
426 | ||
bcf684c7 HPN |
427 | #define REGNO_OK_FOR_BASE_P(REGNO) \ |
428 | ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \ | |
429 | || (REGNO) == MMIX_ARG_POINTER_REGNUM \ | |
430 | || (reg_renumber[REGNO] > 0 \ | |
431 | && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER)) | |
432 | ||
433 | #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO) | |
434 | ||
bcf684c7 HPN |
435 | #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \ |
436 | mmix_secondary_reload_class (CLASS, MODE, X, 1) | |
437 | ||
438 | #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \ | |
439 | mmix_secondary_reload_class (CLASS, MODE, X, 0) | |
440 | ||
441 | #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE) | |
442 | ||
bcf684c7 HPN |
443 | |
444 | /* Node: Frame Layout */ | |
445 | ||
62f9f30b | 446 | #define STACK_GROWS_DOWNWARD 1 |
f62c8a5c | 447 | #define FRAME_GROWS_DOWNWARD 1 |
bcf684c7 HPN |
448 | |
449 | #define STARTING_FRAME_OFFSET \ | |
450 | mmix_starting_frame_offset () | |
451 | ||
3ec1b4cb | 452 | #define FIRST_PARM_OFFSET(FUNDECL) 0 |
bcf684c7 HPN |
453 | |
454 | #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \ | |
455 | mmix_dynamic_chain_address (FRAMEADDR) | |
456 | ||
457 | /* FIXME: It seems RETURN_ADDR_OFFSET is undocumented. */ | |
458 | ||
459 | #define SETUP_FRAME_ADDRESSES() \ | |
460 | mmix_setup_frame_addresses () | |
461 | ||
462 | #define RETURN_ADDR_RTX(COUNT, FRAME) \ | |
463 | mmix_return_addr_rtx (COUNT, FRAME) | |
464 | ||
465 | /* It's in rJ before we store it somewhere. */ | |
466 | #define INCOMING_RETURN_ADDR_RTX \ | |
467 | gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM) | |
468 | ||
469 | /* FIXME: This does not seem properly documented or cross-indexed. | |
470 | Nowhere except in the code does it say it *has* to be in the range | |
471 | 0..255, or else it will be truncated. That goes for the default too. */ | |
472 | #define DWARF_FRAME_RETURN_COLUMN \ | |
473 | DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM) | |
474 | ||
475 | /* No return address is stored there. */ | |
476 | #define INCOMING_FRAME_SP_OFFSET 0 | |
477 | ||
478 | /* Node: Stack Checking */ | |
479 | /* (empty) */ | |
480 | ||
481 | ||
482 | /* Node: Exception Handling */ | |
483 | ||
484 | #define EH_RETURN_DATA_REGNO(N) \ | |
485 | mmix_eh_return_data_regno (N) | |
486 | ||
487 | #define EH_RETURN_STACKADJ_RTX \ | |
488 | mmix_eh_return_stackadj_rtx () | |
489 | ||
490 | #define EH_RETURN_HANDLER_RTX \ | |
491 | mmix_eh_return_handler_rtx () | |
492 | ||
493 | #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \ | |
494 | mmix_asm_preferred_eh_data_format (CODE, GLOBAL) | |
495 | ||
496 | /* Node: Frame Registers */ | |
497 | #define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM | |
498 | ||
499 | /* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on | |
500 | what register we want to use. */ | |
501 | #define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM | |
502 | #define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM | |
503 | ||
504 | #define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM | |
505 | ||
506 | ||
507 | /* Node: Elimination */ | |
bcf684c7 HPN |
508 | |
509 | /* The frame-pointer is stored in a location that either counts to the | |
510 | offset of incoming parameters, or that counts to the offset of the | |
511 | frame, so we can't use a single offset. We therefore eliminate those | |
512 | two separately. */ | |
513 | #define ELIMINABLE_REGS \ | |
514 | {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
515 | {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ | |
516 | {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} | |
517 | ||
bcf684c7 | 518 | #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ |
392fc5b0 | 519 | (OFFSET) = mmix_initial_elimination_offset (FROM, TO) |
bcf684c7 HPN |
520 | |
521 | ||
522 | /* Node: Stack Arguments */ | |
523 | ||
524 | #define ACCUMULATE_OUTGOING_ARGS 1 | |
525 | ||
bcf684c7 HPN |
526 | |
527 | /* Node: Register Arguments */ | |
bcf684c7 | 528 | |
6c535c69 | 529 | typedef struct { int regs; int lib; } CUMULATIVE_ARGS; |
bcf684c7 | 530 | |
0f6937fe | 531 | #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ |
6c535c69 | 532 | ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0)) |
bcf684c7 | 533 | |
bcf684c7 HPN |
534 | #define FUNCTION_ARG_REGNO_P(REGNO) \ |
535 | mmix_function_arg_regno_p (REGNO, 0) | |
536 | ||
bcf684c7 | 537 | |
bcf684c7 HPN |
538 | /* Node: Caller Saves */ |
539 | /* (empty) */ | |
540 | ||
541 | ||
542 | /* Node: Function Entry */ | |
543 | ||
544 | /* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and | |
545 | TARGET_ASM_FUNCTION_EPILOGUE. */ | |
546 | ||
547 | /* We need to say that the epilogue uses the return address, so the | |
548 | initial-value machinery restores it. FIXME: Some targets | |
549 | conditionalize on "reload_completed &&". Investigate difference. | |
550 | FIXME: Not needed if nonlocal_goto_stack_level. */ | |
551 | #define EPILOGUE_USES(REGNO) \ | |
552 | ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM) | |
553 | ||
bcf684c7 HPN |
554 | /* Node: Profiling */ |
555 | #define FUNCTION_PROFILER(FILE, LABELNO) \ | |
556 | mmix_function_profiler (FILE, LABELNO) | |
557 | ||
bcf684c7 HPN |
558 | /* Node: Trampolines */ |
559 | ||
dbbdb385 RH |
560 | #define TRAMPOLINE_SIZE (4*UNITS_PER_WORD) |
561 | #define TRAMPOLINE_ALIGNMENT BITS_PER_WORD | |
bcf684c7 | 562 | |
bcf684c7 HPN |
563 | /* Node: Addressing Modes */ |
564 | ||
565 | #define CONSTANT_ADDRESS_P(X) \ | |
566 | mmix_constant_address_p (X) | |
567 | ||
568 | #define MAX_REGS_PER_ADDRESS 2 | |
569 | ||
bcf684c7 HPN |
570 | |
571 | /* Node: Condition Code */ | |
572 | ||
bcf684c7 HPN |
573 | #define SELECT_CC_MODE(OP, X, Y) \ |
574 | mmix_select_cc_mode (OP, X, Y) | |
575 | ||
38e18619 HPN |
576 | /* A definition of CANONICALIZE_COMPARISON that changed LE and GT |
577 | comparisons with -1 to LT and GE respectively, and LT, LTU, GE or GEU | |
578 | comparisons with 256 to 255 and LE, LEU, GT and GTU has been | |
579 | ineffective; the code path for performing the changes did not trig for | |
109b748d | 580 | neither the GCC testsuite nor ghostscript-6.52 nor Knuth's mmix.tar.gz |
38e18619 HPN |
581 | itself (core GCC functionality supposedly handling it) with sources |
582 | from 2002-06-06. */ | |
bcf684c7 HPN |
583 | |
584 | #define REVERSIBLE_CC_MODE(MODE) \ | |
585 | mmix_reversible_cc_mode (MODE) | |
586 | ||
587 | ||
588 | /* Node: Costs */ | |
589 | ||
bcf684c7 HPN |
590 | #define SLOW_BYTE_ACCESS 0 |
591 | ||
592 | ||
593 | /* Node: Sections */ | |
594 | ||
595 | /* This must be a constant string, since it's used in crtstuff.c. */ | |
596 | #define TEXT_SECTION_ASM_OP \ | |
597 | "\t.text ! mmixal:= 9H LOC 8B" | |
598 | ||
599 | /* FIXME: Not documented. */ | |
600 | #define DATA_SECTION_ASM_OP \ | |
601 | mmix_data_section_asm_op () | |
602 | ||
d48bc59a | 603 | #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata" |
bcf684c7 | 604 | |
bcf684c7 HPN |
605 | /* Node: PIC */ |
606 | /* (empty) */ | |
607 | ||
608 | ||
609 | /* Node: File Framework */ | |
610 | ||
bcf684c7 HPN |
611 | /* While any other punctuation character but ";" would do, we prefer "%" |
612 | or "!"; "!" is an unary operator and so will not be mistakenly included | |
613 | in correctly formed expressions. The hash character adds mass; catches | |
614 | the eye. We can't have it as a comment char by itself, since it's a | |
615 | hex-number prefix. */ | |
616 | #define ASM_COMMENT_START "!#" | |
617 | ||
618 | /* These aren't currently functional. We just keep them as markers. */ | |
619 | #define ASM_APP_ON "%APP\n" | |
620 | #define ASM_APP_OFF "%NO_APP\n" | |
621 | ||
bcf684c7 HPN |
622 | #define OUTPUT_QUOTED_STRING(STREAM, STRING) \ |
623 | mmix_output_quoted_string (STREAM, STRING, strlen (STRING)) | |
624 | ||
bcf684c7 HPN |
625 | #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section |
626 | ||
bcf684c7 HPN |
627 | /* Node: Data Output */ |
628 | ||
bcf684c7 HPN |
629 | #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \ |
630 | mmix_asm_output_ascii (STREAM, PTR, LEN) | |
631 | ||
bcf684c7 HPN |
632 | /* Node: Uninitialized Data */ |
633 | ||
634 | #define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \ | |
635 | mmix_asm_output_aligned_common (ST, N, S, A) | |
636 | ||
637 | #define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \ | |
638 | mmix_asm_output_aligned_local (ST, N, S, A) | |
639 | ||
640 | ||
641 | /* Node: Label Output */ | |
642 | ||
643 | #define ASM_OUTPUT_LABEL(STREAM, NAME) \ | |
644 | mmix_asm_output_label (STREAM, NAME) | |
645 | ||
8d6cdc68 HPN |
646 | #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, NAME) \ |
647 | mmix_asm_output_internal_label (STREAM, NAME) | |
648 | ||
bcf684c7 HPN |
649 | #define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \ |
650 | mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME) | |
651 | ||
5eb99654 | 652 | #define GLOBAL_ASM_OP "\t.global " |
bcf684c7 HPN |
653 | |
654 | #define ASM_WEAKEN_LABEL(STREAM, NAME) \ | |
655 | mmix_asm_weaken_label (STREAM, NAME) | |
656 | ||
657 | #define MAKE_DECL_ONE_ONLY(DECL) \ | |
658 | mmix_make_decl_one_only (DECL) | |
659 | ||
660 | #define ASM_OUTPUT_LABELREF(STREAM, NAME) \ | |
661 | mmix_asm_output_labelref (STREAM, NAME) | |
662 | ||
bcf684c7 HPN |
663 | /* We insert a ":" to disambiguate against user symbols like L5. */ |
664 | #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \ | |
75540760 | 665 | sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM)) |
bcf684c7 HPN |
666 | |
667 | /* Insert "::"; these are rarer than internal labels. FIXME: Make sure no | |
668 | ":" is seen in the object file; we don't really want that mmixal | |
669 | feature visible there. We don't want the default, which uses a dot; | |
670 | that'd be incompatible with mmixal. */ | |
4977bab6 | 671 | #define ASM_PN_FORMAT "%s::%lu" |
bcf684c7 HPN |
672 | |
673 | #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \ | |
674 | mmix_asm_output_def (STREAM, NAME, VALUE) | |
675 | ||
bcf684c7 | 676 | /* Node: Macros for Initialization */ |
38e18619 HPN |
677 | /* We're compiling to ELF and linking to MMO; fundamental ELF features |
678 | that GCC depend on are there. */ | |
bcf684c7 HPN |
679 | |
680 | /* These must be constant strings, since they're used in crtstuff.c. */ | |
681 | #define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible" | |
682 | ||
683 | #define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible" | |
684 | ||
685 | #define OBJECT_FORMAT_ELF | |
686 | ||
687 | ||
688 | /* Node: Instruction Output */ | |
689 | ||
690 | /* The non-$ register names must be prefixed with ":", since they're | |
691 | affected by PREFIX. We provide the non-colon names as additional | |
692 | names. */ | |
693 | #define REGISTER_NAMES \ | |
694 | {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \ | |
695 | "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \ | |
696 | "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \ | |
697 | "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31", \ | |
698 | "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39", \ | |
699 | "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47", \ | |
700 | "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55", \ | |
701 | "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63", \ | |
702 | "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71", \ | |
703 | "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79", \ | |
704 | "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87", \ | |
705 | "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95", \ | |
706 | "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103", \ | |
707 | "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111", \ | |
708 | "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119", \ | |
709 | "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127", \ | |
710 | "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135", \ | |
711 | "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143", \ | |
712 | "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151", \ | |
713 | "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159", \ | |
714 | "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167", \ | |
715 | "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175", \ | |
716 | "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183", \ | |
717 | "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191", \ | |
718 | "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199", \ | |
719 | "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207", \ | |
720 | "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215", \ | |
721 | "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223", \ | |
722 | "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231", \ | |
723 | "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239", \ | |
724 | "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247", \ | |
725 | "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255", \ | |
957ec0f9 | 726 | ":rD", ":rE", ":rH", ":rJ", ":rR", "ap_!BAD!", ":rO"} |
bcf684c7 HPN |
727 | |
728 | #define ADDITIONAL_REGISTER_NAMES \ | |
729 | {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257}, \ | |
957ec0f9 | 730 | {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}, {"rO", MMIX_rO_REGNUM}} |
bcf684c7 | 731 | |
bcf684c7 HPN |
732 | #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \ |
733 | mmix_asm_output_reg_push (STREAM, REGNO) | |
734 | ||
735 | #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \ | |
736 | mmix_asm_output_reg_pop (STREAM, REGNO) | |
737 | ||
738 | ||
739 | /* Node: Dispatch Tables */ | |
740 | ||
741 | /* We define both types, since SImode is the better, but DImode the only | |
742 | possible for mmixal so that's the one actually used. */ | |
743 | #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \ | |
744 | mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL) | |
745 | ||
746 | #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \ | |
747 | mmix_asm_output_addr_vec_elt (STREAM, VALUE) | |
748 | ||
749 | ||
bcf684c7 HPN |
750 | /* Node: Exception Region Output */ |
751 | /* (empty) */ | |
752 | ||
753 | /* Node: Alignment Output */ | |
754 | ||
755 | #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \ | |
756 | mmix_asm_output_skip (STREAM, NBYTES) | |
757 | ||
758 | #define ASM_OUTPUT_ALIGN(STREAM, POWER) \ | |
759 | mmix_asm_output_align (STREAM, POWER) | |
760 | ||
761 | ||
762 | /* Node: All Debuggers */ | |
763 | ||
764 | #define DBX_REGISTER_NUMBER(REGNO) \ | |
765 | mmix_dbx_register_number (REGNO) | |
766 | ||
767 | ||
768 | /* Node: DBX Options */ | |
769 | /* (empty) */ | |
770 | /* Node: DBX Hooks */ | |
771 | /* (empty) */ | |
772 | /* Node: File Names and DBX */ | |
773 | /* (empty) */ | |
774 | ||
775 | ||
776 | /* Node: SDB and DWARF */ | |
23532de9 | 777 | #define DWARF2_DEBUGGING_INFO 1 |
bcf684c7 HPN |
778 | #define DWARF2_ASM_LINE_DEBUG_INFO 1 |
779 | ||
bcf684c7 HPN |
780 | /* Node: Misc */ |
781 | ||
bcf684c7 HPN |
782 | /* There's no way to get a PC-relative offset into tables for SImode, so |
783 | for the moment we have absolute entries in DImode. | |
784 | When we're going ELF, these should be SImode and 1. */ | |
785 | #define CASE_VECTOR_MODE DImode | |
786 | #define CASE_VECTOR_PC_RELATIVE 0 | |
787 | ||
9e11bfef | 788 | #define WORD_REGISTER_OPERATIONS 1 |
bcf684c7 HPN |
789 | |
790 | /* We have a choice, which makes this yet another parameter to tweak. The | |
791 | gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent | |
792 | than "unsigned int", and we have signed characters. FIXME: measure. */ | |
793 | #define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND) | |
794 | ||
bcf684c7 HPN |
795 | #define MOVE_MAX 8 |
796 | ||
797 | #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
798 | ||
06f31100 RS |
799 | /* ??? MMIX allows a choice of STORE_FLAG_VALUE. Revisit later, |
800 | we don't have scc expanders yet. */ | |
bcf684c7 HPN |
801 | |
802 | #define Pmode DImode | |
803 | ||
804 | #define FUNCTION_MODE QImode | |
805 | ||
bcf684c7 HPN |
806 | #define NO_IMPLICIT_EXTERN_C |
807 | ||
d33d9e47 AI |
808 | /* mmix-knuth-mmixware target has no support of C99 runtime */ |
809 | #undef TARGET_LIBC_HAS_FUNCTION | |
810 | #define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function | |
811 | ||
bcf684c7 HPN |
812 | /* These are checked. */ |
813 | #define DOLLARS_IN_IDENTIFIERS 0 | |
814 | #define NO_DOLLAR_IN_LABEL | |
815 | #define NO_DOT_IN_LABEL | |
816 | ||
817 | #endif /* GCC_MMIX_H */ | |
818 | /* | |
819 | * Local variables: | |
820 | * eval: (c-set-style "gnu") | |
821 | * indent-tabs-mode: t | |
822 | * End: | |
823 | */ |