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bcf684c7 | 1 | /* Definitions of target machine for GNU compiler, for MMIX. |
a9ba5098 | 2 | Copyright (C) 2000, 2001, 2002, 2004 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 HPN |
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 | ||
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 | |
c583c5c3 | 18 | along with GCC; see the file COPYING. If not, write to |
bcf684c7 HPN |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #ifndef GCC_MMIX_H | |
23 | #define GCC_MMIX_H | |
24 | ||
25 | /* First, some local helper macros. Note that the "default" value of | |
26 | FIXED_REGISTERS, CALL_USED_REGISTERS, REG_ALLOC_ORDER and | |
27 | REG_CLASS_CONTENTS depend on these values. */ | |
28 | #define MMIX_RESERVED_GNU_ARG_0_REGNUM 231 | |
29 | #define MMIX_FIRST_ARG_REGNUM \ | |
30 | (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 16) | |
31 | #define MMIX_FIRST_INCOMING_ARG_REGNUM \ | |
32 | (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 0) | |
33 | #define MMIX_MAX_ARGS_IN_REGS 16 | |
34 | ||
35 | /* FIXME: This one isn't fully implemented yet. Return values larger than | |
36 | one register are passed by reference in MMIX_STRUCT_VALUE_REGNUM by the | |
37 | caller, except for return values of type "complex". */ | |
38 | #define MMIX_MAX_REGS_FOR_VALUE 16 | |
39 | #define MMIX_RETURN_VALUE_REGNUM \ | |
40 | (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 15) | |
41 | #define MMIX_OUTGOING_RETURN_VALUE_REGNUM \ | |
42 | (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 0) | |
43 | #define MMIX_STRUCT_VALUE_REGNUM 251 | |
44 | #define MMIX_STATIC_CHAIN_REGNUM 252 | |
45 | #define MMIX_FRAME_POINTER_REGNUM 253 | |
46 | #define MMIX_STACK_POINTER_REGNUM 254 | |
47 | #define MMIX_LAST_GENERAL_REGISTER 255 | |
91312b81 | 48 | #define MMIX_INCOMING_RETURN_ADDRESS_REGNUM MMIX_rJ_REGNUM |
bcf684c7 | 49 | #define MMIX_HIMULT_REGNUM 258 |
34116c2a | 50 | #define MMIX_REMAINDER_REGNUM MMIX_rR_REGNUM |
bcf684c7 | 51 | #define MMIX_ARG_POINTER_REGNUM 261 |
957ec0f9 | 52 | #define MMIX_rO_REGNUM 262 |
1f2641b6 | 53 | #define MMIX_LAST_STACK_REGISTER_REGNUM 31 |
bcf684c7 HPN |
54 | |
55 | /* Four registers; "ideally, these registers should be call-clobbered", so | |
56 | just grab a bunch of the common clobbered registers. FIXME: Last | |
57 | registers of return-value should be used, with an error if there's a | |
58 | return-value (that collides in size). */ | |
59 | #define MMIX_EH_RETURN_DATA_REGNO_START (MMIX_STRUCT_VALUE_REGNUM - 4) | |
60 | ||
61 | /* Try to keep the definitions from running away on their own. */ | |
62 | #if (MMIX_EH_RETURN_DATA_REGNO_START \ | |
63 | != MMIX_RESERVED_GNU_ARG_0_REGNUM + MMIX_MAX_ARGS_IN_REGS) | |
64 | #error MMIX register definition inconsistency | |
65 | #endif | |
66 | ||
67 | #if (MMIX_MAX_REGS_FOR_VALUE + MMIX_MAX_ARGS_IN_REGS > 32) | |
68 | #error MMIX parameters and return values bad, more than 32 registers | |
69 | #endif | |
70 | ||
71 | /* This chosen as "a call-clobbered hard register that is otherwise | |
72 | untouched by the epilogue". */ | |
73 | #define MMIX_EH_RETURN_STACKADJ_REGNUM MMIX_STATIC_CHAIN_REGNUM | |
74 | ||
75 | #ifdef REG_OK_STRICT | |
76 | # define MMIX_REG_OK_STRICT 1 | |
77 | #else | |
78 | # define MMIX_REG_OK_STRICT 0 | |
79 | #endif | |
80 | ||
81 | #define MMIX_FUNCTION_ARG_SIZE(MODE, TYPE) \ | |
82 | ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) : int_size_in_bytes (TYPE)) | |
83 | ||
84 | /* Declarations for helper variables that are not tied to a particular | |
85 | target macro. */ | |
e2500fed GK |
86 | extern GTY(()) rtx mmix_compare_op0; |
87 | extern GTY(()) rtx mmix_compare_op1; | |
bcf684c7 HPN |
88 | |
89 | /* Per-function machine data. This is normally an opaque type just | |
90 | defined and used in the tm.c file, but we need to see the definition in | |
91 | mmix.md too. */ | |
e2500fed | 92 | struct machine_function GTY(()) |
bcf684c7 | 93 | { |
bcf684c7 | 94 | int has_landing_pad; |
1f2641b6 | 95 | int highest_saved_stack_register; |
957ec0f9 | 96 | int in_prologue; |
bcf684c7 HPN |
97 | }; |
98 | ||
99 | /* For these target macros, there is no generic documentation here. You | |
100 | should read `Using and Porting GCC' for that. Only comments specific | |
101 | to the MMIX target are here. | |
102 | ||
103 | There are however references to the specific texinfo node (comments | |
104 | with "Node:"), so there should be little or nothing amiss. Probably | |
105 | the opposite, since we don't have to care about old littering and | |
106 | soon outdated generic comments. */ | |
107 | ||
108 | /* Node: Driver */ | |
109 | ||
bcf684c7 HPN |
110 | /* User symbols are in the same name-space as built-in symbols, but we |
111 | don't need the built-in symbols, so remove those and instead apply | |
112 | stricter operand checking. Don't warn when expanding insns. */ | |
113 | #define ASM_SPEC "-no-predefined-syms -x" | |
114 | ||
115 | /* Pass on -mset-program-start=N and -mset-data-start=M to the linker. | |
116 | Provide default program start 0x100 unless -mno-set-program-start. | |
4f1aac42 HPN |
117 | Don't do this if linking relocatably, with -r. For a final link, |
118 | produce mmo, unless ELF is requested or when linking relocatably. */ | |
bcf684c7 HPN |
119 | #define LINK_SPEC \ |
120 | "%{mset-program-start=*:--defsym __.MMIX.start..text=%*}\ | |
121 | %{mset-data-start=*:--defsym __.MMIX.start..data=%*}\ | |
122 | %{!mset-program-start=*:\ | |
4f1aac42 HPN |
123 | %{!mno-set-program-start:\ |
124 | %{!r:--defsym __.MMIX.start..text=0x100}}}\ | |
125 | %{!melf:%{!r:-m mmo}}%{melf|r:-m elf64mmix}" | |
bcf684c7 HPN |
126 | |
127 | /* Put unused option values here. */ | |
75540760 | 128 | extern const char *mmix_cc1_ignored_option; |
bcf684c7 HPN |
129 | |
130 | #define TARGET_OPTIONS \ | |
131 | {{"set-program-start=", &mmix_cc1_ignored_option, \ | |
c409ea0d | 132 | N_("Set start-address of the program"), 0}, \ |
bcf684c7 | 133 | {"set-data-start=", &mmix_cc1_ignored_option, \ |
c409ea0d | 134 | N_("Set start-address of data"), 0} } |
bcf684c7 HPN |
135 | |
136 | /* FIXME: There's no provision for profiling here. */ | |
137 | #define STARTFILE_SPEC \ | |
138 | "crti%O%s crtbegin%O%s" | |
139 | ||
140 | #define ENDFILE_SPEC "crtend%O%s crtn%O%s" | |
141 | ||
142 | /* Node: Run-time Target */ | |
143 | ||
144 | /* Define __LONG_MAX__, since we're advised not to change glimits.h. */ | |
38e18619 HPN |
145 | #define TARGET_CPU_CPP_BUILTINS() \ |
146 | do \ | |
147 | { \ | |
148 | builtin_define ("__mmix__"); \ | |
149 | builtin_define ("__MMIX__"); \ | |
38e18619 HPN |
150 | if (TARGET_ABI_GNU) \ |
151 | builtin_define ("__MMIX_ABI_GNU__"); \ | |
152 | else \ | |
153 | builtin_define ("__MMIX_ABI_MMIXWARE__"); \ | |
154 | } \ | |
155 | while (0) | |
bcf684c7 HPN |
156 | |
157 | extern int target_flags; | |
158 | ||
159 | #define TARGET_MASK_LIBFUNCS 1 | |
160 | #define TARGET_MASK_ABI_GNU 2 | |
161 | #define TARGET_MASK_FCMP_EPSILON 4 | |
162 | #define TARGET_MASK_ZERO_EXTEND 8 | |
163 | #define TARGET_MASK_KNUTH_DIVISION 16 | |
164 | #define TARGET_MASK_TOPLEVEL_SYMBOLS 32 | |
91312b81 | 165 | #define TARGET_MASK_BRANCH_PREDICT 64 |
66b8c57f | 166 | #define TARGET_MASK_USE_RETURN_INSN 128 |
bcf684c7 | 167 | |
a824924d HPN |
168 | /* We use the term "base address" since that's what Knuth uses. The base |
169 | address goes in a global register. When addressing, it's more like | |
170 | "base address plus offset", with the offset being 0..255 from the base, | |
171 | which itself can be a symbol plus an offset. The effect is like having | |
2a43945f | 172 | a constant pool in global registers, code offsetting from those |
a824924d HPN |
173 | registers (automatically causing a request for a suitable constant base |
174 | address register) without having to know the specific register or the | |
38e18619 HPN |
175 | specific offset. The setback is that there's a limited number of |
176 | registers, and you'll not find out until link time whether you | |
59b9a953 | 177 | should have compiled with -mno-base-addresses. */ |
a824924d HPN |
178 | #define TARGET_MASK_BASE_ADDRESSES 128 |
179 | ||
bcf684c7 HPN |
180 | /* FIXME: Get rid of this one. */ |
181 | #define TARGET_LIBFUNC (target_flags & TARGET_MASK_LIBFUNCS) | |
182 | #define TARGET_ABI_GNU (target_flags & TARGET_MASK_ABI_GNU) | |
183 | #define TARGET_FCMP_EPSILON (target_flags & TARGET_MASK_FCMP_EPSILON) | |
184 | #define TARGET_ZERO_EXTEND (target_flags & TARGET_MASK_ZERO_EXTEND) | |
185 | #define TARGET_KNUTH_DIVISION (target_flags & TARGET_MASK_KNUTH_DIVISION) | |
186 | #define TARGET_TOPLEVEL_SYMBOLS (target_flags & TARGET_MASK_TOPLEVEL_SYMBOLS) | |
91312b81 | 187 | #define TARGET_BRANCH_PREDICT (target_flags & TARGET_MASK_BRANCH_PREDICT) |
a824924d | 188 | #define TARGET_BASE_ADDRESSES (target_flags & TARGET_MASK_BASE_ADDRESSES) |
66b8c57f | 189 | #define TARGET_USE_RETURN_INSN (target_flags & TARGET_MASK_USE_RETURN_INSN) |
bcf684c7 | 190 | |
3e0f61ac | 191 | #define TARGET_DEFAULT \ |
66b8c57f HPN |
192 | (TARGET_MASK_BRANCH_PREDICT | TARGET_MASK_BASE_ADDRESSES \ |
193 | | TARGET_MASK_USE_RETURN_INSN) | |
bcf684c7 | 194 | |
91312b81 | 195 | /* FIXME: Provide a way to *load* the epsilon register. */ |
bcf684c7 HPN |
196 | #define TARGET_SWITCHES \ |
197 | {{"libfuncs", TARGET_MASK_LIBFUNCS, \ | |
198 | N_("For intrinsics library: pass all parameters in registers")}, \ | |
199 | {"no-libfuncs", -TARGET_MASK_LIBFUNCS, ""}, \ | |
200 | {"abi=mmixware", -TARGET_MASK_ABI_GNU, \ | |
201 | N_("Use register stack for parameters and return value")}, \ | |
202 | {"abi=gnu", TARGET_MASK_ABI_GNU, \ | |
203 | N_("Use call-clobbered registers for parameters and return value")}, \ | |
204 | {"epsilon", TARGET_MASK_FCMP_EPSILON, \ | |
205 | N_("Use epsilon-respecting floating point compare instructions")}, \ | |
206 | {"no-epsilon", -TARGET_MASK_FCMP_EPSILON, ""}, \ | |
207 | {"zero-extend", TARGET_MASK_ZERO_EXTEND, \ | |
208 | N_("Use zero-extending memory loads, not sign-extending ones")}, \ | |
209 | {"no-zero-extend", -TARGET_MASK_ZERO_EXTEND, ""}, \ | |
210 | {"knuthdiv", TARGET_MASK_KNUTH_DIVISION, \ | |
211 | N_("Generate divide results with reminder having the same sign as the\ | |
c725bd79 | 212 | divisor (not the dividend)")}, \ |
bcf684c7 HPN |
213 | {"no-knuthdiv", -TARGET_MASK_KNUTH_DIVISION, ""}, \ |
214 | {"toplevel-symbols", TARGET_MASK_TOPLEVEL_SYMBOLS, \ | |
215 | N_("Prepend global symbols with \":\" (for use with PREFIX)")}, \ | |
91312b81 | 216 | {"no-toplevel-symbols", -TARGET_MASK_TOPLEVEL_SYMBOLS, \ |
bcf684c7 HPN |
217 | N_("Do not provide a default start-address 0x100 of the program")}, \ |
218 | {"elf", 0, \ | |
219 | N_("Link to emit program in ELF format (rather than mmo)")}, \ | |
91312b81 HPN |
220 | {"branch-predict", TARGET_MASK_BRANCH_PREDICT, \ |
221 | N_("Use P-mnemonics for branches statically predicted as taken")}, \ | |
222 | {"no-branch-predict", -TARGET_MASK_BRANCH_PREDICT, \ | |
223 | N_("Don't use P-mnemonics for branches")}, \ | |
a824924d HPN |
224 | {"base-addresses", TARGET_MASK_BASE_ADDRESSES, \ |
225 | N_("Use addresses that allocate global registers")}, \ | |
226 | {"no-base-addresses", -TARGET_MASK_BASE_ADDRESSES, \ | |
227 | N_("Do not use addresses that allocate global registers")}, \ | |
66b8c57f HPN |
228 | {"single-exit", -TARGET_MASK_USE_RETURN_INSN, \ |
229 | N_("Generate a single exit point for each function")}, \ | |
230 | {"no-single-exit", TARGET_MASK_USE_RETURN_INSN, \ | |
231 | N_("Do not generate a single exit point for each function")}, \ | |
bcf684c7 HPN |
232 | {"", TARGET_DEFAULT, ""}} |
233 | ||
234 | /* Unfortunately, this must not reference anything in "mmix.c". */ | |
235 | #define TARGET_VERSION \ | |
91312b81 | 236 | fprintf (stderr, " (MMIX)") |
bcf684c7 HPN |
237 | |
238 | #define OVERRIDE_OPTIONS mmix_override_options () | |
239 | ||
240 | #define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \ | |
241 | do \ | |
242 | { \ | |
243 | if (LEVEL >= 1) \ | |
244 | flag_regmove = TRUE; \ | |
245 | \ | |
246 | if (SIZE || LEVEL > 1) \ | |
247 | { \ | |
248 | flag_omit_frame_pointer = TRUE; \ | |
249 | flag_strength_reduce = FALSE; \ | |
250 | } \ | |
251 | } \ | |
252 | while (0) | |
253 | ||
254 | /* This one will have to wait a little bit; right now we can't debug | |
255 | neither with or without a frame-pointer. */ | |
256 | /* #define CAN_DEBUG_WITHOUT_FP */ | |
257 | ||
258 | ||
259 | /* Node: Per-Function Data */ | |
260 | #define INIT_EXPANDERS mmix_init_expanders () | |
261 | ||
262 | ||
263 | /* Node: Storage Layout */ | |
43a88a8c | 264 | /* I see no bit-field instructions. Anyway, the common order is from low |
bcf684c7 HPN |
265 | to high, as the power of two, hence little-endian. */ |
266 | #define BITS_BIG_ENDIAN 0 | |
267 | #define BYTES_BIG_ENDIAN 1 | |
268 | #define WORDS_BIG_ENDIAN 1 | |
269 | #define FLOAT_WORDS_BIG_ENDIAN 1 | |
bcf684c7 | 270 | #define UNITS_PER_WORD 8 |
bcf684c7 | 271 | |
bcf684c7 HPN |
272 | /* FIXME: Promotion of modes currently generates slow code, extending |
273 | before every operation. */ | |
d4453b7a PB |
274 | /* I'm a little bit undecided about this one. It might be beneficial to |
275 | promote all operations. */ | |
bcf684c7 | 276 | |
d4453b7a | 277 | #define PROMOTE_FUNCTION_MODE(MODE, UNSIGNEDP, TYPE) \ |
bcf684c7 HPN |
278 | do { \ |
279 | if (GET_MODE_CLASS (MODE) == MODE_INT \ | |
280 | && GET_MODE_SIZE (MODE) < 8) \ | |
281 | { \ | |
282 | (MODE) = DImode; \ | |
283 | /* Do the following some time later, \ | |
284 | scrutinizing differences. */ \ | |
285 | if (0) (UNSIGNEDP) = 0; \ | |
286 | } \ | |
287 | } while (0) | |
288 | ||
bcf684c7 HPN |
289 | /* We need to align everything to 64 bits that can affect the alignment |
290 | of other types. Since address N is interpreted in MMIX as (N modulo | |
291 | access_size), we must align. */ | |
292 | #define PARM_BOUNDARY 64 | |
293 | #define STACK_BOUNDARY 64 | |
294 | #define FUNCTION_BOUNDARY 32 | |
295 | #define BIGGEST_ALIGNMENT 64 | |
296 | ||
297 | /* This one is only used in the ADA front end. */ | |
298 | #define MINIMUM_ATOMIC_ALIGNMENT 8 | |
299 | ||
300 | /* Copied from elfos.h. */ | |
301 | #define MAX_OFILE_ALIGNMENT (32768 * 8) | |
302 | ||
303 | #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \ | |
304 | mmix_data_alignment (TYPE, BASIC_ALIGN) | |
305 | ||
306 | #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \ | |
307 | mmix_constant_alignment (CONSTANT, BASIC_ALIGN) | |
308 | ||
309 | #define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \ | |
310 | mmix_local_alignment (TYPE, BASIC_ALIGN) | |
311 | ||
312 | /* Following other ports, this seems to most commonly be the word-size, | |
313 | so let's do that here too. */ | |
314 | #define EMPTY_FIELD_BOUNDARY 64 | |
315 | ||
316 | /* We chose to have this low solely for similarity with the alpha. It has | |
317 | nothing to do with passing the tests dg/c99-scope-2 and | |
318 | execute/align-1.c. Nothing. Though the tests seem wrong. Padding of | |
319 | the structure is automatically added to get alignment when needed if we | |
320 | set this to just byte-boundary. */ | |
321 | #define STRUCTURE_SIZE_BOUNDARY 8 | |
322 | ||
323 | /* The lower bits are ignored. */ | |
324 | #define STRICT_ALIGNMENT 1 | |
325 | ||
326 | ||
327 | /* Node: Type Layout */ | |
328 | ||
329 | /* It might seem more natural to have 64-bit ints on a 64-bit machine, | |
330 | but then an occasional MMIX programmer needs to know how to put a lot | |
331 | of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather | |
332 | than the "intuitive" char, short and int types. */ | |
333 | #define INT_TYPE_SIZE 32 | |
334 | #define SHORT_TYPE_SIZE 16 | |
335 | #define LONG_LONG_TYPE_SIZE 64 | |
336 | ||
337 | #define FLOAT_TYPE_SIZE 32 | |
338 | #define DOUBLE_TYPE_SIZE 64 | |
339 | #define LONG_DOUBLE_TYPE_SIZE 64 | |
340 | ||
341 | #define DEFAULT_SIGNED_CHAR 1 | |
342 | ||
bcf684c7 HPN |
343 | |
344 | /* Node: Register Basics */ | |
345 | /* We tell GCC about all 256 general registers, and we also include | |
957ec0f9 | 346 | rD, rE, rH, rJ, rR and rO (in that order) so we can describe what insns |
bcf684c7 HPN |
347 | clobber them. We use a faked register for the argument pointer. It is |
348 | always eliminated towards the frame-pointer or the stack-pointer, never | |
349 | output in assembly. Any fixed register would do for this, like $255, | |
350 | but future debugging is easier when using a separate register. It | |
351 | counts as a global register for pseudorandom reasons. */ | |
957ec0f9 | 352 | #define FIRST_PSEUDO_REGISTER 263 |
bcf684c7 HPN |
353 | |
354 | /* We treat general registers with no assigned purpose as fixed. The | |
355 | stack pointer, $254, is also fixed. Register $255 is referred to as a | |
356 | temporary register in the MMIX papers, and used as such in mmixal, so | |
357 | it should not be used as a stack pointer. We set it to fixed, and use | |
358 | it "manually" at times of despair. */ | |
359 | #define FIXED_REGISTERS \ | |
360 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
361 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
362 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
363 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
364 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
365 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
366 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
367 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
368 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
369 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
370 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
371 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
372 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
373 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
a824924d HPN |
374 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ |
375 | 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, \ | |
957ec0f9 | 376 | 1, 1, 0, 0, 0, 1, 1 \ |
bcf684c7 HPN |
377 | } |
378 | ||
379 | /* General registers are fixed and therefore "historically" marked | |
380 | call-used. (FIXME: This has changed). Registers $15..$31 are | |
381 | call-clobbered; we'll put arguments in $16 and up, and we need $15 for | |
382 | the MMIX register-stack "hole". */ | |
383 | #define CALL_USED_REGISTERS \ | |
384 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, \ | |
385 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
386 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
387 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
388 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
389 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
390 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
391 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
392 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
393 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
394 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
395 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
396 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
397 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
398 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
399 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, \ | |
957ec0f9 | 400 | 1, 1, 1, 1, 1, 1, 1 \ |
bcf684c7 HPN |
401 | } |
402 | ||
403 | #define CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage () | |
404 | ||
957ec0f9 HPN |
405 | /* No INCOMING_REGNO or OUTGOING_REGNO, since those macros are not usable |
406 | for MMIX: it doesn't have a fixed register window size. FIXME: Perhaps | |
407 | we should say something about $0..$15 may sometimes be the incoming | |
408 | $16..$31. Those macros need better documentation; it looks like | |
409 | they're just bogus and that FUNCTION_INCOMING_ARG_REGNO_P and | |
410 | FUNCTION_OUTGOING_VALUE should be used where they're used. For the | |
bcf684c7 HPN |
411 | moment, do nothing; things seem to work anyway. */ |
412 | ||
957ec0f9 HPN |
413 | /* Defining LOCAL_REGNO is necessary in presence of prologue/epilogue, |
414 | else GCC will be confused that those registers aren't saved and | |
415 | restored. */ | |
416 | #define LOCAL_REGNO(REGNO) mmix_local_regno (REGNO) | |
bcf684c7 HPN |
417 | |
418 | /* Node: Allocation Order */ | |
419 | ||
420 | /* We should allocate registers from 0 to 31 by increasing number, because | |
421 | I think that's what people expect. Beyond that, just use | |
422 | call-clobbered global registers first, then call-clobbered special | |
423 | registers. Last, the fixed registers. */ | |
424 | #define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER \ | |
425 | { 0, 1, 2, 3, 4, 5, 6, 7, \ | |
426 | 8, 9, 10, 11, 12, 13, 14, 15, \ | |
427 | 16, 17, 18, 19, 20, 21, 22, 23, \ | |
428 | 24, 25, 26, 27, 28, 29, 30, 31, \ | |
429 | \ | |
430 | 252, 251, 250, 249, 248, 247, \ | |
bcf684c7 HPN |
431 | \ |
432 | 253, \ | |
433 | \ | |
434 | 258, 260, 259, \ | |
435 | \ | |
436 | 32, 33, 34, 35, 36, 37, 38, 39, \ | |
437 | 40, 41, 42, 43, 44, 45, 46, 47, \ | |
438 | 48, 49, 50, 51, 52, 53, 54, 55, \ | |
439 | 56, 57, 58, 59, 60, 61, 62, 63, \ | |
440 | 64, 65, 66, 67, 68, 69, 70, 71, \ | |
441 | 72, 73, 74, 75, 76, 77, 78, 79, \ | |
442 | 80, 81, 82, 83, 84, 85, 86, 87, \ | |
443 | 88, 89, 90, 91, 92, 93, 94, 95, \ | |
444 | 96, 97, 98, 99, 100, 101, 102, 103, \ | |
445 | 104, 105, 106, 107, 108, 109, 110, 111, \ | |
446 | 112, 113, 114, 115, 116, 117, 118, 119, \ | |
447 | 120, 121, 122, 123, 124, 125, 126, 127, \ | |
448 | 128, 129, 130, 131, 132, 133, 134, 135, \ | |
449 | 136, 137, 138, 139, 140, 141, 142, 143, \ | |
450 | 144, 145, 146, 147, 148, 149, 150, 151, \ | |
451 | 152, 153, 154, 155, 156, 157, 158, 159, \ | |
452 | 160, 161, 162, 163, 164, 165, 166, 167, \ | |
453 | 168, 169, 170, 171, 172, 173, 174, 175, \ | |
454 | 176, 177, 178, 179, 180, 181, 182, 183, \ | |
455 | 184, 185, 186, 187, 188, 189, 190, 191, \ | |
456 | 192, 193, 194, 195, 196, 197, 198, 199, \ | |
457 | 200, 201, 202, 203, 204, 205, 206, 207, \ | |
458 | 208, 209, 210, 211, 212, 213, 214, 215, \ | |
459 | 216, 217, 218, 219, 220, 221, 222, 223, \ | |
460 | 224, 225, 226, 227, 228, 229, 230, 231, \ | |
a824924d HPN |
461 | 232, 233, 234, 235, 236, 237, 238, 239, \ |
462 | 240, 241, 242, 243, 244, 245, 246, \ | |
463 | \ | |
957ec0f9 | 464 | 254, 255, 256, 257, 261, 262 \ |
bcf684c7 HPN |
465 | } |
466 | ||
467 | /* As a convenience, we put this nearby, for ease of comparison. | |
468 | First, call-clobbered registers in reverse order of assignment as | |
469 | parameters (also the top ones; not because they're parameters, but | |
470 | for continuity). | |
471 | ||
472 | Second, saved registers that go on the register-stack. | |
473 | ||
474 | Third, special registers rH, rR and rJ. They should not normally be | |
475 | allocated, but since they're call-clobbered, it is cheaper to use one | |
476 | of them than using a call-saved register for a call-clobbered use, | |
477 | assuming it is referenced a very limited number of times. Other global | |
478 | and fixed registers come next; they are never allocated. */ | |
479 | #define MMIX_GNU_ABI_REG_ALLOC_ORDER \ | |
3ec1b4cb | 480 | { 252, 251, 250, 249, 248, 247, 246, \ |
bcf684c7 | 481 | 245, 244, 243, 242, 241, 240, 239, 238, \ |
a824924d | 482 | 237, 236, 235, 234, 233, 232, 231, \ |
bcf684c7 HPN |
483 | \ |
484 | 0, 1, 2, 3, 4, 5, 6, 7, \ | |
485 | 8, 9, 10, 11, 12, 13, 14, 15, \ | |
486 | 16, 17, 18, 19, 20, 21, 22, 23, \ | |
487 | 24, 25, 26, 27, 28, 29, 30, 31, \ | |
488 | \ | |
489 | 253, \ | |
490 | \ | |
491 | 258, 260, 259, \ | |
492 | \ | |
493 | 32, 33, 34, 35, 36, 37, 38, 39, \ | |
494 | 40, 41, 42, 43, 44, 45, 46, 47, \ | |
495 | 48, 49, 50, 51, 52, 53, 54, 55, \ | |
496 | 56, 57, 58, 59, 60, 61, 62, 63, \ | |
497 | 64, 65, 66, 67, 68, 69, 70, 71, \ | |
498 | 72, 73, 74, 75, 76, 77, 78, 79, \ | |
499 | 80, 81, 82, 83, 84, 85, 86, 87, \ | |
500 | 88, 89, 90, 91, 92, 93, 94, 95, \ | |
501 | 96, 97, 98, 99, 100, 101, 102, 103, \ | |
502 | 104, 105, 106, 107, 108, 109, 110, 111, \ | |
503 | 112, 113, 114, 115, 116, 117, 118, 119, \ | |
504 | 120, 121, 122, 123, 124, 125, 126, 127, \ | |
505 | 128, 129, 130, 131, 132, 133, 134, 135, \ | |
506 | 136, 137, 138, 139, 140, 141, 142, 143, \ | |
507 | 144, 145, 146, 147, 148, 149, 150, 151, \ | |
508 | 152, 153, 154, 155, 156, 157, 158, 159, \ | |
509 | 160, 161, 162, 163, 164, 165, 166, 167, \ | |
510 | 168, 169, 170, 171, 172, 173, 174, 175, \ | |
511 | 176, 177, 178, 179, 180, 181, 182, 183, \ | |
512 | 184, 185, 186, 187, 188, 189, 190, 191, \ | |
513 | 192, 193, 194, 195, 196, 197, 198, 199, \ | |
514 | 200, 201, 202, 203, 204, 205, 206, 207, \ | |
515 | 208, 209, 210, 211, 212, 213, 214, 215, \ | |
516 | 216, 217, 218, 219, 220, 221, 222, 223, \ | |
a824924d HPN |
517 | 224, 225, 226, 227, 228, 229, 230, \ |
518 | \ | |
957ec0f9 | 519 | 254, 255, 256, 257, 261, 262 \ |
bcf684c7 HPN |
520 | } |
521 | ||
522 | /* The default one. */ | |
523 | #define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER | |
524 | ||
525 | /* Node: Values in Registers */ | |
526 | ||
527 | #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
528 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \ | |
529 | / UNITS_PER_WORD) | |
530 | ||
531 | #define HARD_REGNO_MODE_OK(REGNO, MODE) 1 | |
532 | ||
533 | /* Note that no register can really be accessed in single-float mode, so | |
534 | we *can* say 1 here. FIXME: Will TRT happen for single-float, or do | |
535 | we have to punt to libgcc1.asm? */ | |
536 | #define MODES_TIEABLE_P(MODE1, MODE2) 1 | |
537 | ||
538 | ||
539 | /* Node: Leaf Functions */ | |
540 | /* (empty) */ | |
541 | ||
542 | ||
543 | /* Node: Register Classes */ | |
544 | ||
545 | enum reg_class | |
3ec1b4cb HPN |
546 | { |
547 | NO_REGS, GENERAL_REGS, REMAINDER_REG, HIMULT_REG, | |
548 | SYSTEM_REGS, ALL_REGS, LIM_REG_CLASSES | |
549 | }; | |
bcf684c7 HPN |
550 | |
551 | #define N_REG_CLASSES (int) LIM_REG_CLASSES | |
552 | ||
553 | #define REG_CLASS_NAMES \ | |
554 | {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG", \ | |
555 | "SYSTEM_REGS", "ALL_REGS"} | |
556 | ||
557 | /* Note that the contents of each item is always 32 bits. */ | |
558 | #define REG_CLASS_CONTENTS \ | |
559 | {{0, 0, 0, 0, 0, 0, 0, 0, 0}, \ | |
560 | {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20}, \ | |
561 | {0, 0, 0, 0, 0, 0, 0, 0, 0x10}, \ | |
562 | {0, 0, 0, 0, 0, 0, 0, 0, 4}, \ | |
957ec0f9 HPN |
563 | {0, 0, 0, 0, 0, 0, 0, 0, 0x7f}, \ |
564 | {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x7f}} | |
bcf684c7 HPN |
565 | |
566 | #define REGNO_REG_CLASS(REGNO) \ | |
567 | ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \ | |
568 | || (REGNO) == MMIX_ARG_POINTER_REGNUM \ | |
569 | ? GENERAL_REGS \ | |
570 | : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG \ | |
571 | : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS) | |
572 | ||
573 | #define BASE_REG_CLASS GENERAL_REGS | |
574 | ||
575 | #define INDEX_REG_CLASS GENERAL_REGS | |
576 | ||
577 | #define REG_CLASS_FROM_LETTER(CHAR) \ | |
578 | ((CHAR) == 'x' ? SYSTEM_REGS \ | |
579 | : (CHAR) == 'y' ? REMAINDER_REG \ | |
580 | : (CHAR) == 'z' ? HIMULT_REG : NO_REGS) | |
581 | ||
582 | #define REGNO_OK_FOR_BASE_P(REGNO) \ | |
583 | ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \ | |
584 | || (REGNO) == MMIX_ARG_POINTER_REGNUM \ | |
585 | || (reg_renumber[REGNO] > 0 \ | |
586 | && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER)) | |
587 | ||
588 | #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO) | |
589 | ||
590 | #define PREFERRED_RELOAD_CLASS(X, CLASS) \ | |
591 | mmix_preferred_reload_class (X, CLASS) | |
592 | ||
593 | #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \ | |
594 | mmix_preferred_output_reload_class (X, CLASS) | |
595 | ||
596 | #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \ | |
597 | mmix_secondary_reload_class (CLASS, MODE, X, 1) | |
598 | ||
599 | #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \ | |
600 | mmix_secondary_reload_class (CLASS, MODE, X, 0) | |
601 | ||
602 | #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE) | |
603 | ||
604 | #define CONST_OK_FOR_LETTER_P(VALUE, C) \ | |
605 | mmix_const_ok_for_letter_p (VALUE, C) | |
606 | ||
607 | #define EXTRA_CONSTRAINT(VALUE, C) \ | |
e9fef64c | 608 | mmix_extra_constraint (VALUE, C, MMIX_REG_OK_STRICT) |
bcf684c7 HPN |
609 | |
610 | /* Do we need anything serious here? Yes, any FLOT constant. */ | |
611 | #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ | |
612 | mmix_const_double_ok_for_letter_p (VALUE, C) | |
613 | ||
614 | ||
615 | /* Node: Frame Layout */ | |
616 | ||
617 | #define STACK_GROWS_DOWNWARD | |
618 | #define FRAME_GROWS_DOWNWARD | |
619 | ||
620 | #define STARTING_FRAME_OFFSET \ | |
621 | mmix_starting_frame_offset () | |
622 | ||
3ec1b4cb | 623 | #define FIRST_PARM_OFFSET(FUNDECL) 0 |
bcf684c7 HPN |
624 | |
625 | #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \ | |
626 | mmix_dynamic_chain_address (FRAMEADDR) | |
627 | ||
628 | /* FIXME: It seems RETURN_ADDR_OFFSET is undocumented. */ | |
629 | ||
630 | #define SETUP_FRAME_ADDRESSES() \ | |
631 | mmix_setup_frame_addresses () | |
632 | ||
633 | #define RETURN_ADDR_RTX(COUNT, FRAME) \ | |
634 | mmix_return_addr_rtx (COUNT, FRAME) | |
635 | ||
636 | /* It's in rJ before we store it somewhere. */ | |
637 | #define INCOMING_RETURN_ADDR_RTX \ | |
638 | gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM) | |
639 | ||
640 | /* FIXME: This does not seem properly documented or cross-indexed. | |
641 | Nowhere except in the code does it say it *has* to be in the range | |
642 | 0..255, or else it will be truncated. That goes for the default too. */ | |
643 | #define DWARF_FRAME_RETURN_COLUMN \ | |
644 | DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM) | |
645 | ||
646 | /* No return address is stored there. */ | |
647 | #define INCOMING_FRAME_SP_OFFSET 0 | |
648 | ||
649 | /* Node: Stack Checking */ | |
650 | /* (empty) */ | |
651 | ||
652 | ||
653 | /* Node: Exception Handling */ | |
654 | ||
655 | #define EH_RETURN_DATA_REGNO(N) \ | |
656 | mmix_eh_return_data_regno (N) | |
657 | ||
658 | #define EH_RETURN_STACKADJ_RTX \ | |
659 | mmix_eh_return_stackadj_rtx () | |
660 | ||
661 | #define EH_RETURN_HANDLER_RTX \ | |
662 | mmix_eh_return_handler_rtx () | |
663 | ||
664 | #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \ | |
665 | mmix_asm_preferred_eh_data_format (CODE, GLOBAL) | |
666 | ||
667 | /* Node: Frame Registers */ | |
668 | #define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM | |
669 | ||
670 | /* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on | |
671 | what register we want to use. */ | |
672 | #define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM | |
673 | #define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM | |
674 | ||
675 | #define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM | |
676 | ||
677 | ||
678 | /* Node: Elimination */ | |
679 | /* FIXME: Is this requirement built-in? Anyway, we should try to get rid | |
680 | of it; we can deduce the value. */ | |
9d6bb566 | 681 | #define FRAME_POINTER_REQUIRED current_function_has_nonlocal_label |
bcf684c7 HPN |
682 | |
683 | /* The frame-pointer is stored in a location that either counts to the | |
684 | offset of incoming parameters, or that counts to the offset of the | |
685 | frame, so we can't use a single offset. We therefore eliminate those | |
686 | two separately. */ | |
687 | #define ELIMINABLE_REGS \ | |
688 | {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
689 | {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ | |
690 | {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} | |
691 | ||
692 | /* We need not worry about when the frame-pointer is required for other | |
693 | reasons; GCC takes care of those cases. */ | |
694 | #define CAN_ELIMINATE(FROM, TO) 1 | |
695 | ||
696 | #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ | |
392fc5b0 | 697 | (OFFSET) = mmix_initial_elimination_offset (FROM, TO) |
bcf684c7 HPN |
698 | |
699 | ||
700 | /* Node: Stack Arguments */ | |
701 | ||
702 | #define ACCUMULATE_OUTGOING_ARGS 1 | |
703 | ||
704 | #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0 | |
705 | ||
706 | ||
707 | /* Node: Register Arguments */ | |
708 | #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ | |
709 | mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 0) | |
710 | ||
711 | #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \ | |
712 | mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 1) | |
713 | ||
6c535c69 | 714 | typedef struct { int regs; int lib; } CUMULATIVE_ARGS; |
bcf684c7 | 715 | |
0f6937fe | 716 | #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ |
6c535c69 | 717 | ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0)) |
bcf684c7 HPN |
718 | |
719 | #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ | |
720 | ((CUM).regs \ | |
fe984136 | 721 | = ((targetm.calls.must_pass_in_stack (MODE, TYPE)) \ |
bcf684c7 HPN |
722 | || (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE) > 8 \ |
723 | && !TARGET_LIBFUNC && !(CUM).lib)) \ | |
724 | ? (MMIX_MAX_ARGS_IN_REGS) + 1 \ | |
725 | : (CUM).regs + (7 + (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE))) / 8) | |
726 | ||
727 | #define FUNCTION_ARG_REGNO_P(REGNO) \ | |
728 | mmix_function_arg_regno_p (REGNO, 0) | |
729 | ||
730 | #define FUNCTION_INCOMING_ARG_REGNO_P(REGNO) \ | |
731 | mmix_function_arg_regno_p (REGNO, 1) | |
732 | ||
733 | ||
734 | /* Node: Register Arguments */ | |
735 | ||
736 | #define FUNCTION_VALUE(VALTYPE, FUNC) \ | |
737 | gen_rtx_REG (TYPE_MODE (VALTYPE), MMIX_RETURN_VALUE_REGNUM) | |
738 | ||
739 | /* This needs to take care of the register hole for complex return values. */ | |
740 | #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) \ | |
741 | mmix_function_outgoing_value (VALTYPE, FUNC) | |
742 | ||
743 | #define LIBCALL_VALUE(MODE) \ | |
4b32269b | 744 | gen_rtx_REG (MODE, MMIX_RETURN_VALUE_REGNUM) |
bcf684c7 HPN |
745 | |
746 | #define FUNCTION_VALUE_REGNO_P(REGNO) \ | |
4b32269b | 747 | mmix_function_value_regno_p (REGNO) |
bcf684c7 HPN |
748 | |
749 | ||
bcf684c7 HPN |
750 | /* Node: Caller Saves */ |
751 | /* (empty) */ | |
752 | ||
753 | ||
754 | /* Node: Function Entry */ | |
755 | ||
756 | /* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and | |
757 | TARGET_ASM_FUNCTION_EPILOGUE. */ | |
758 | ||
759 | /* We need to say that the epilogue uses the return address, so the | |
760 | initial-value machinery restores it. FIXME: Some targets | |
761 | conditionalize on "reload_completed &&". Investigate difference. | |
762 | FIXME: Not needed if nonlocal_goto_stack_level. */ | |
763 | #define EPILOGUE_USES(REGNO) \ | |
764 | ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM) | |
765 | ||
bcf684c7 HPN |
766 | /* Node: Profiling */ |
767 | #define FUNCTION_PROFILER(FILE, LABELNO) \ | |
768 | mmix_function_profiler (FILE, LABELNO) | |
769 | ||
bcf684c7 HPN |
770 | /* Node: Trampolines */ |
771 | ||
772 | #define TRAMPOLINE_TEMPLATE(FILE) \ | |
773 | mmix_trampoline_template (FILE) | |
774 | ||
775 | #define TRAMPOLINE_SIZE mmix_trampoline_size | |
776 | #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \ | |
777 | mmix_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN) | |
778 | ||
779 | ||
bcf684c7 HPN |
780 | /* Node: Addressing Modes */ |
781 | ||
782 | #define CONSTANT_ADDRESS_P(X) \ | |
783 | mmix_constant_address_p (X) | |
784 | ||
785 | #define MAX_REGS_PER_ADDRESS 2 | |
786 | ||
787 | #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ | |
788 | if (mmix_legitimate_address (MODE, X, MMIX_REG_OK_STRICT)) \ | |
789 | goto LABEL | |
790 | ||
791 | #ifndef REG_OK_STRICT | |
792 | # define REG_OK_FOR_BASE_P(X) \ | |
793 | (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \ | |
794 | || REGNO (X) == MMIX_ARG_POINTER_REGNUM \ | |
795 | || REGNO (X) >= FIRST_PSEUDO_REGISTER) | |
796 | #else | |
797 | # define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) | |
798 | #endif /* REG_OK_STRICT */ | |
799 | ||
800 | #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X) | |
801 | ||
bcf684c7 HPN |
802 | #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) |
803 | ||
804 | #define LEGITIMATE_CONSTANT_P(X) \ | |
805 | mmix_legitimate_constant_p (X) | |
806 | ||
807 | ||
808 | /* Node: Condition Code */ | |
809 | ||
bcf684c7 HPN |
810 | #define SELECT_CC_MODE(OP, X, Y) \ |
811 | mmix_select_cc_mode (OP, X, Y) | |
812 | ||
38e18619 HPN |
813 | /* A definition of CANONICALIZE_COMPARISON that changed LE and GT |
814 | comparisons with -1 to LT and GE respectively, and LT, LTU, GE or GEU | |
815 | comparisons with 256 to 255 and LE, LEU, GT and GTU has been | |
816 | ineffective; the code path for performing the changes did not trig for | |
109b748d | 817 | neither the GCC testsuite nor ghostscript-6.52 nor Knuth's mmix.tar.gz |
38e18619 HPN |
818 | itself (core GCC functionality supposedly handling it) with sources |
819 | from 2002-06-06. */ | |
bcf684c7 HPN |
820 | |
821 | #define REVERSIBLE_CC_MODE(MODE) \ | |
822 | mmix_reversible_cc_mode (MODE) | |
823 | ||
824 | ||
825 | /* Node: Costs */ | |
826 | ||
bcf684c7 HPN |
827 | /* The special registers can only move to and from general regs, and we |
828 | need to check that their constraints match, so say 3 for them. */ | |
829 | /* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2) | |
830 | miscompiles reload1.c:reload_cse_simplify_set; a call to | |
831 | reload_cse_regno_equal_p is missing when checking if a substitution of | |
832 | a register setting is valid if this is defined to just the expression | |
833 | in mmix_register_move_cost. | |
834 | ||
835 | Symptom: a (all?) register setting is optimized away for e.g. | |
836 | "char *p1(char *p) { return p+1; }" and the value of register zero ($0) | |
837 | is returned. | |
838 | ||
839 | We can workaround by making this a function call - unknown if this | |
840 | causes dire speed effects. */ | |
841 | #define REGISTER_MOVE_COST(MODE, FROM, TO) \ | |
842 | mmix_register_move_cost (MODE, FROM, TO) | |
843 | ||
844 | #define SLOW_BYTE_ACCESS 0 | |
845 | ||
846 | ||
847 | /* Node: Sections */ | |
848 | ||
849 | /* This must be a constant string, since it's used in crtstuff.c. */ | |
850 | #define TEXT_SECTION_ASM_OP \ | |
851 | "\t.text ! mmixal:= 9H LOC 8B" | |
852 | ||
853 | /* FIXME: Not documented. */ | |
854 | #define DATA_SECTION_ASM_OP \ | |
855 | mmix_data_section_asm_op () | |
856 | ||
d48bc59a | 857 | #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata" |
bcf684c7 | 858 | |
bcf684c7 HPN |
859 | /* Node: PIC */ |
860 | /* (empty) */ | |
861 | ||
862 | ||
863 | /* Node: File Framework */ | |
864 | ||
bcf684c7 HPN |
865 | /* While any other punctuation character but ";" would do, we prefer "%" |
866 | or "!"; "!" is an unary operator and so will not be mistakenly included | |
867 | in correctly formed expressions. The hash character adds mass; catches | |
868 | the eye. We can't have it as a comment char by itself, since it's a | |
869 | hex-number prefix. */ | |
870 | #define ASM_COMMENT_START "!#" | |
871 | ||
872 | /* These aren't currently functional. We just keep them as markers. */ | |
873 | #define ASM_APP_ON "%APP\n" | |
874 | #define ASM_APP_OFF "%NO_APP\n" | |
875 | ||
876 | #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \ | |
877 | mmix_asm_output_source_filename (STREAM, NAME) | |
878 | ||
879 | #define OUTPUT_QUOTED_STRING(STREAM, STRING) \ | |
880 | mmix_output_quoted_string (STREAM, STRING, strlen (STRING)) | |
881 | ||
bcf684c7 HPN |
882 | #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section |
883 | ||
bcf684c7 HPN |
884 | /* Node: Data Output */ |
885 | ||
bcf684c7 HPN |
886 | #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \ |
887 | mmix_asm_output_ascii (STREAM, PTR, LEN) | |
888 | ||
bcf684c7 HPN |
889 | /* Node: Uninitialized Data */ |
890 | ||
891 | #define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \ | |
892 | mmix_asm_output_aligned_common (ST, N, S, A) | |
893 | ||
894 | #define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \ | |
895 | mmix_asm_output_aligned_local (ST, N, S, A) | |
896 | ||
897 | ||
898 | /* Node: Label Output */ | |
899 | ||
900 | #define ASM_OUTPUT_LABEL(STREAM, NAME) \ | |
901 | mmix_asm_output_label (STREAM, NAME) | |
902 | ||
8d6cdc68 HPN |
903 | #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, NAME) \ |
904 | mmix_asm_output_internal_label (STREAM, NAME) | |
905 | ||
bcf684c7 HPN |
906 | #define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \ |
907 | mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME) | |
908 | ||
5eb99654 | 909 | #define GLOBAL_ASM_OP "\t.global " |
bcf684c7 HPN |
910 | |
911 | #define ASM_WEAKEN_LABEL(STREAM, NAME) \ | |
912 | mmix_asm_weaken_label (STREAM, NAME) | |
913 | ||
914 | #define MAKE_DECL_ONE_ONLY(DECL) \ | |
915 | mmix_make_decl_one_only (DECL) | |
916 | ||
917 | #define ASM_OUTPUT_LABELREF(STREAM, NAME) \ | |
918 | mmix_asm_output_labelref (STREAM, NAME) | |
919 | ||
bcf684c7 HPN |
920 | /* We insert a ":" to disambiguate against user symbols like L5. */ |
921 | #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \ | |
75540760 | 922 | sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM)) |
bcf684c7 HPN |
923 | |
924 | /* Insert "::"; these are rarer than internal labels. FIXME: Make sure no | |
925 | ":" is seen in the object file; we don't really want that mmixal | |
926 | feature visible there. We don't want the default, which uses a dot; | |
927 | that'd be incompatible with mmixal. */ | |
4977bab6 | 928 | #define ASM_PN_FORMAT "%s::%lu" |
bcf684c7 HPN |
929 | |
930 | #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \ | |
931 | mmix_asm_output_def (STREAM, NAME, VALUE) | |
932 | ||
bcf684c7 | 933 | /* Node: Macros for Initialization */ |
38e18619 HPN |
934 | /* We're compiling to ELF and linking to MMO; fundamental ELF features |
935 | that GCC depend on are there. */ | |
bcf684c7 HPN |
936 | |
937 | /* These must be constant strings, since they're used in crtstuff.c. */ | |
938 | #define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible" | |
939 | ||
940 | #define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible" | |
941 | ||
942 | #define OBJECT_FORMAT_ELF | |
943 | ||
944 | ||
945 | /* Node: Instruction Output */ | |
946 | ||
947 | /* The non-$ register names must be prefixed with ":", since they're | |
948 | affected by PREFIX. We provide the non-colon names as additional | |
949 | names. */ | |
950 | #define REGISTER_NAMES \ | |
951 | {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \ | |
952 | "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \ | |
953 | "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \ | |
954 | "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31", \ | |
955 | "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39", \ | |
956 | "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47", \ | |
957 | "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55", \ | |
958 | "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63", \ | |
959 | "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71", \ | |
960 | "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79", \ | |
961 | "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87", \ | |
962 | "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95", \ | |
963 | "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103", \ | |
964 | "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111", \ | |
965 | "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119", \ | |
966 | "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127", \ | |
967 | "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135", \ | |
968 | "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143", \ | |
969 | "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151", \ | |
970 | "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159", \ | |
971 | "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167", \ | |
972 | "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175", \ | |
973 | "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183", \ | |
974 | "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191", \ | |
975 | "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199", \ | |
976 | "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207", \ | |
977 | "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215", \ | |
978 | "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223", \ | |
979 | "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231", \ | |
980 | "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239", \ | |
981 | "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247", \ | |
982 | "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255", \ | |
957ec0f9 | 983 | ":rD", ":rE", ":rH", ":rJ", ":rR", "ap_!BAD!", ":rO"} |
bcf684c7 HPN |
984 | |
985 | #define ADDITIONAL_REGISTER_NAMES \ | |
986 | {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257}, \ | |
957ec0f9 | 987 | {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}, {"rO", MMIX_rO_REGNUM}} |
bcf684c7 HPN |
988 | |
989 | #define PRINT_OPERAND(STREAM, X, CODE) \ | |
990 | mmix_print_operand (STREAM, X, CODE) | |
991 | ||
992 | #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ | |
993 | mmix_print_operand_punct_valid_p (CODE) | |
994 | ||
995 | #define PRINT_OPERAND_ADDRESS(STREAM, X) \ | |
996 | mmix_print_operand_address (STREAM, X) | |
997 | ||
bcf684c7 HPN |
998 | #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \ |
999 | mmix_asm_output_reg_push (STREAM, REGNO) | |
1000 | ||
1001 | #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \ | |
1002 | mmix_asm_output_reg_pop (STREAM, REGNO) | |
1003 | ||
1004 | ||
1005 | /* Node: Dispatch Tables */ | |
1006 | ||
1007 | /* We define both types, since SImode is the better, but DImode the only | |
1008 | possible for mmixal so that's the one actually used. */ | |
1009 | #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \ | |
1010 | mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL) | |
1011 | ||
1012 | #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \ | |
1013 | mmix_asm_output_addr_vec_elt (STREAM, VALUE) | |
1014 | ||
1015 | ||
bcf684c7 HPN |
1016 | /* Node: Exception Region Output */ |
1017 | /* (empty) */ | |
1018 | ||
1019 | /* Node: Alignment Output */ | |
1020 | ||
1021 | #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \ | |
1022 | mmix_asm_output_skip (STREAM, NBYTES) | |
1023 | ||
1024 | #define ASM_OUTPUT_ALIGN(STREAM, POWER) \ | |
1025 | mmix_asm_output_align (STREAM, POWER) | |
1026 | ||
1027 | ||
1028 | /* Node: All Debuggers */ | |
1029 | ||
1030 | #define DBX_REGISTER_NUMBER(REGNO) \ | |
1031 | mmix_dbx_register_number (REGNO) | |
1032 | ||
1033 | ||
1034 | /* Node: DBX Options */ | |
1035 | /* (empty) */ | |
1036 | /* Node: DBX Hooks */ | |
1037 | /* (empty) */ | |
1038 | /* Node: File Names and DBX */ | |
1039 | /* (empty) */ | |
1040 | ||
1041 | ||
1042 | /* Node: SDB and DWARF */ | |
23532de9 | 1043 | #define DWARF2_DEBUGGING_INFO 1 |
bcf684c7 HPN |
1044 | #define DWARF2_ASM_LINE_DEBUG_INFO 1 |
1045 | ||
bcf684c7 HPN |
1046 | /* Node: Misc */ |
1047 | ||
1048 | #define PREDICATE_CODES \ | |
1049 | {"mmix_reg_cc_operand", {SUBREG, REG}}, \ | |
1050 | {"mmix_foldable_comparison_operator", \ | |
1051 | {NE, EQ, GE, GT, LE, LT}}, \ | |
1052 | /* All '<', actually. */ \ | |
1053 | {"mmix_comparison_operator", \ | |
1054 | {NE, EQ, GE, GT, LE, LT, GEU, GTU, LEU, \ | |
1055 | LTU, UNORDERED, ORDERED, UNEQ, UNGE, UNLE, \ | |
1056 | UNLT, LTGT}}, \ | |
1057 | {"mmix_symbolic_or_address_operand", \ | |
1058 | {SYMBOL_REF, LABEL_REF, CONST, \ | |
1059 | SUBREG, REG, PLUS}}, \ | |
1060 | {"mmix_reg_or_constant_operand", \ | |
1061 | {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \ | |
bcf684c7 HPN |
1062 | {"mmix_reg_or_8bit_operand", \ |
1063 | {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \ | |
1064 | {"mmix_reg_or_0_operand", \ | |
1065 | {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, | |
1066 | ||
1067 | #define SPECIAL_MODE_PREDICATES "mmix_symbolic_or_address_operand", | |
1068 | ||
1069 | /* There's no way to get a PC-relative offset into tables for SImode, so | |
1070 | for the moment we have absolute entries in DImode. | |
1071 | When we're going ELF, these should be SImode and 1. */ | |
1072 | #define CASE_VECTOR_MODE DImode | |
1073 | #define CASE_VECTOR_PC_RELATIVE 0 | |
1074 | ||
1075 | #define WORD_REGISTER_OPERATIONS | |
1076 | ||
1077 | /* We have a choice, which makes this yet another parameter to tweak. The | |
1078 | gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent | |
1079 | than "unsigned int", and we have signed characters. FIXME: measure. */ | |
1080 | #define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND) | |
1081 | ||
bcf684c7 HPN |
1082 | #define MOVE_MAX 8 |
1083 | ||
1084 | #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
1085 | ||
06f31100 RS |
1086 | /* ??? MMIX allows a choice of STORE_FLAG_VALUE. Revisit later, |
1087 | we don't have scc expanders yet. */ | |
bcf684c7 HPN |
1088 | |
1089 | #define Pmode DImode | |
1090 | ||
1091 | #define FUNCTION_MODE QImode | |
1092 | ||
bcf684c7 HPN |
1093 | #define NO_IMPLICIT_EXTERN_C |
1094 | ||
32f0ffb3 | 1095 | #define HANDLE_SYSV_PRAGMA 1 |
bcf684c7 HPN |
1096 | |
1097 | /* These are checked. */ | |
1098 | #define DOLLARS_IN_IDENTIFIERS 0 | |
1099 | #define NO_DOLLAR_IN_LABEL | |
1100 | #define NO_DOT_IN_LABEL | |
1101 | ||
1102 | #endif /* GCC_MMIX_H */ | |
1103 | /* | |
1104 | * Local variables: | |
1105 | * eval: (c-set-style "gnu") | |
1106 | * indent-tabs-mode: t | |
1107 | * End: | |
1108 | */ |