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elfos.h (HANDLE_SYSV_PRAGMA): Define as 1.
[gcc.git] / gcc / config / mmix / mmix.h
1 /* Definitions of target machine for GNU compiler, for MMIX.
2 Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
3 Contributed by Hans-Peter Nilsson (hp@bitrange.com)
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
11
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to
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
48 #define MMIX_INCOMING_RETURN_ADDRESS_REGNUM MMIX_rJ_REGNUM
49 #define MMIX_HIMULT_REGNUM 258
50 #define MMIX_REMAINDER_REGNUM MMIX_rR_REGNUM
51 #define MMIX_ARG_POINTER_REGNUM 261
52 #define MMIX_rO_REGNUM 262
53 #define MMIX_LAST_STACK_REGISTER_REGNUM 31
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. */
86 extern GTY(()) rtx mmix_compare_op0;
87 extern GTY(()) rtx mmix_compare_op1;
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. */
92 struct machine_function GTY(())
93 {
94 int has_landing_pad;
95 int highest_saved_stack_register;
96 int in_prologue;
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
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.
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. */
119 #define LINK_SPEC \
120 "%{mset-program-start=*:--defsym __.MMIX.start..text=%*}\
121 %{mset-data-start=*:--defsym __.MMIX.start..data=%*}\
122 %{!mset-program-start=*:\
123 %{!mno-set-program-start:\
124 %{!r:--defsym __.MMIX.start..text=0x100}}}\
125 %{!melf:%{!r:-m mmo}}%{melf|r:-m elf64mmix}"
126
127 /* Put unused option values here. */
128 extern const char *mmix_cc1_ignored_option;
129
130 #define TARGET_OPTIONS \
131 {{"set-program-start=", &mmix_cc1_ignored_option, \
132 N_("Set start-address of the program") }, \
133 {"set-data-start=", &mmix_cc1_ignored_option, \
134 N_("Set start-address of data")}}
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. */
145 #define TARGET_CPU_CPP_BUILTINS() \
146 do \
147 { \
148 builtin_define ("__mmix__"); \
149 builtin_define ("__MMIX__"); \
150 if (TARGET_ABI_GNU) \
151 builtin_define ("__MMIX_ABI_GNU__"); \
152 else \
153 builtin_define ("__MMIX_ABI_MMIXWARE__"); \
154 } \
155 while (0)
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
165 #define TARGET_MASK_BRANCH_PREDICT 64
166 #define TARGET_MASK_USE_RETURN_INSN 128
167
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
172 a constant pool in global registers, code offseting from those
173 registers (automatically causing a request for a suitable constant base
174 address register) without having to know the specific register or the
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
177 should've compiled with -mno-base-addresses. */
178 #define TARGET_MASK_BASE_ADDRESSES 128
179
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)
187 #define TARGET_BRANCH_PREDICT (target_flags & TARGET_MASK_BRANCH_PREDICT)
188 #define TARGET_BASE_ADDRESSES (target_flags & TARGET_MASK_BASE_ADDRESSES)
189 #define TARGET_USE_RETURN_INSN (target_flags & TARGET_MASK_USE_RETURN_INSN)
190
191 #define TARGET_DEFAULT \
192 (TARGET_MASK_BRANCH_PREDICT | TARGET_MASK_BASE_ADDRESSES \
193 | TARGET_MASK_USE_RETURN_INSN)
194
195 /* FIXME: Provide a way to *load* the epsilon register. */
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\
212 divisor (not the dividend)")}, \
213 {"no-knuthdiv", -TARGET_MASK_KNUTH_DIVISION, ""}, \
214 {"toplevel-symbols", TARGET_MASK_TOPLEVEL_SYMBOLS, \
215 N_("Prepend global symbols with \":\" (for use with PREFIX)")}, \
216 {"no-toplevel-symbols", -TARGET_MASK_TOPLEVEL_SYMBOLS, \
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)")}, \
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")}, \
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")}, \
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")}, \
232 {"", TARGET_DEFAULT, ""}}
233
234 /* Unfortunately, this must not reference anything in "mmix.c". */
235 #define TARGET_VERSION \
236 fprintf (stderr, " (MMIX)")
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 */
264 /* I see no bit-field instructions. Anyway, the common order is from low
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
270 #define UNITS_PER_WORD 8
271
272 /* FIXME: This macro is correlated to MAX_FIXED_MODE_SIZE in that
273 e.g. this macro must not be 8 (default, UNITS_PER_WORD) when
274 MAX_FIXED_MODE_SIZE is 64 (default, DImode), or really: this must be
275 set manually if MAX_FIXED_MODE_SIZE is not at least twice the register
276 size. By setting it to 4, we don't have to worry about TImode things
277 yet. Revisit, perhaps get TImode going or get some solution that does
278 not mandate TImode or lie in other ways. */
279 #define MIN_UNITS_PER_WORD 4
280
281 /* FIXME: Promotion of modes currently generates slow code, extending
282 before every operation. */
283
284 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
285 do { \
286 if (GET_MODE_CLASS (MODE) == MODE_INT \
287 && GET_MODE_SIZE (MODE) < 8) \
288 { \
289 (MODE) = DImode; \
290 /* Do the following some time later, \
291 scrutinizing differences. */ \
292 if (0) (UNSIGNEDP) = 0; \
293 } \
294 } while (0)
295
296 #define PROMOTE_FUNCTION_ARGS
297
298 #if 0
299 /* Apparently not doing TRT if int < register-size. FIXME: Perhaps
300 FUNCTION_VALUE and LIBCALL_VALUE needs tweaking as some ports say. */
301 #define PROMOTE_FUNCTION_RETURN
302 #endif
303
304 /* I'm a little bit undecided about this one. It might be beneficial to
305 promote all operations. */
306 #define PROMOTE_FOR_CALL_ONLY
307
308 /* We need to align everything to 64 bits that can affect the alignment
309 of other types. Since address N is interpreted in MMIX as (N modulo
310 access_size), we must align. */
311 #define PARM_BOUNDARY 64
312 #define STACK_BOUNDARY 64
313 #define FUNCTION_BOUNDARY 32
314 #define BIGGEST_ALIGNMENT 64
315
316 /* This one is only used in the ADA front end. */
317 #define MINIMUM_ATOMIC_ALIGNMENT 8
318
319 /* Copied from elfos.h. */
320 #define MAX_OFILE_ALIGNMENT (32768 * 8)
321
322 #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
323 mmix_data_alignment (TYPE, BASIC_ALIGN)
324
325 #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
326 mmix_constant_alignment (CONSTANT, BASIC_ALIGN)
327
328 #define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \
329 mmix_local_alignment (TYPE, BASIC_ALIGN)
330
331 /* Following other ports, this seems to most commonly be the word-size,
332 so let's do that here too. */
333 #define EMPTY_FIELD_BOUNDARY 64
334
335 /* We chose to have this low solely for similarity with the alpha. It has
336 nothing to do with passing the tests dg/c99-scope-2 and
337 execute/align-1.c. Nothing. Though the tests seem wrong. Padding of
338 the structure is automatically added to get alignment when needed if we
339 set this to just byte-boundary. */
340 #define STRUCTURE_SIZE_BOUNDARY 8
341
342 /* The lower bits are ignored. */
343 #define STRICT_ALIGNMENT 1
344
345
346 /* Node: Type Layout */
347
348 /* It might seem more natural to have 64-bit ints on a 64-bit machine,
349 but then an occasional MMIX programmer needs to know how to put a lot
350 of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather
351 than the "intuitive" char, short and int types. */
352 #define INT_TYPE_SIZE 32
353 #define SHORT_TYPE_SIZE 16
354 #define LONG_LONG_TYPE_SIZE 64
355
356 #define FLOAT_TYPE_SIZE 32
357 #define DOUBLE_TYPE_SIZE 64
358 #define LONG_DOUBLE_TYPE_SIZE 64
359
360 #define DEFAULT_SIGNED_CHAR 1
361
362
363 /* Node: Register Basics */
364 /* We tell GCC about all 256 general registers, and we also include
365 rD, rE, rH, rJ, rR and rO (in that order) so we can describe what insns
366 clobber them. We use a faked register for the argument pointer. It is
367 always eliminated towards the frame-pointer or the stack-pointer, never
368 output in assembly. Any fixed register would do for this, like $255,
369 but future debugging is easier when using a separate register. It
370 counts as a global register for pseudorandom reasons. */
371 #define FIRST_PSEUDO_REGISTER 263
372
373 /* We treat general registers with no assigned purpose as fixed. The
374 stack pointer, $254, is also fixed. Register $255 is referred to as a
375 temporary register in the MMIX papers, and used as such in mmixal, so
376 it should not be used as a stack pointer. We set it to fixed, and use
377 it "manually" at times of despair. */
378 #define FIXED_REGISTERS \
379 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
380 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
381 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
382 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
383 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
384 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 0, 0, 0, 0, 0, 0, 0, 1, 1, \
395 1, 1, 0, 0, 0, 1, 1 \
396 }
397
398 /* General registers are fixed and therefore "historically" marked
399 call-used. (FIXME: This has changed). Registers $15..$31 are
400 call-clobbered; we'll put arguments in $16 and up, and we need $15 for
401 the MMIX register-stack "hole". */
402 #define CALL_USED_REGISTERS \
403 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, \
404 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
405 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
406 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
407 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
408 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
409 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
410 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
411 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
412 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
413 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
414 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
415 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
416 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
417 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
418 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, \
419 1, 1, 1, 1, 1, 1, 1 \
420 }
421
422 #define CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage ()
423
424 /* No INCOMING_REGNO or OUTGOING_REGNO, since those macros are not usable
425 for MMIX: it doesn't have a fixed register window size. FIXME: Perhaps
426 we should say something about $0..$15 may sometimes be the incoming
427 $16..$31. Those macros need better documentation; it looks like
428 they're just bogus and that FUNCTION_INCOMING_ARG_REGNO_P and
429 FUNCTION_OUTGOING_VALUE should be used where they're used. For the
430 moment, do nothing; things seem to work anyway. */
431
432 /* Defining LOCAL_REGNO is necessary in presence of prologue/epilogue,
433 else GCC will be confused that those registers aren't saved and
434 restored. */
435 #define LOCAL_REGNO(REGNO) mmix_local_regno (REGNO)
436
437 /* Node: Allocation Order */
438
439 /* We should allocate registers from 0 to 31 by increasing number, because
440 I think that's what people expect. Beyond that, just use
441 call-clobbered global registers first, then call-clobbered special
442 registers. Last, the fixed registers. */
443 #define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER \
444 { 0, 1, 2, 3, 4, 5, 6, 7, \
445 8, 9, 10, 11, 12, 13, 14, 15, \
446 16, 17, 18, 19, 20, 21, 22, 23, \
447 24, 25, 26, 27, 28, 29, 30, 31, \
448 \
449 252, 251, 250, 249, 248, 247, \
450 \
451 253, \
452 \
453 258, 260, 259, \
454 \
455 32, 33, 34, 35, 36, 37, 38, 39, \
456 40, 41, 42, 43, 44, 45, 46, 47, \
457 48, 49, 50, 51, 52, 53, 54, 55, \
458 56, 57, 58, 59, 60, 61, 62, 63, \
459 64, 65, 66, 67, 68, 69, 70, 71, \
460 72, 73, 74, 75, 76, 77, 78, 79, \
461 80, 81, 82, 83, 84, 85, 86, 87, \
462 88, 89, 90, 91, 92, 93, 94, 95, \
463 96, 97, 98, 99, 100, 101, 102, 103, \
464 104, 105, 106, 107, 108, 109, 110, 111, \
465 112, 113, 114, 115, 116, 117, 118, 119, \
466 120, 121, 122, 123, 124, 125, 126, 127, \
467 128, 129, 130, 131, 132, 133, 134, 135, \
468 136, 137, 138, 139, 140, 141, 142, 143, \
469 144, 145, 146, 147, 148, 149, 150, 151, \
470 152, 153, 154, 155, 156, 157, 158, 159, \
471 160, 161, 162, 163, 164, 165, 166, 167, \
472 168, 169, 170, 171, 172, 173, 174, 175, \
473 176, 177, 178, 179, 180, 181, 182, 183, \
474 184, 185, 186, 187, 188, 189, 190, 191, \
475 192, 193, 194, 195, 196, 197, 198, 199, \
476 200, 201, 202, 203, 204, 205, 206, 207, \
477 208, 209, 210, 211, 212, 213, 214, 215, \
478 216, 217, 218, 219, 220, 221, 222, 223, \
479 224, 225, 226, 227, 228, 229, 230, 231, \
480 232, 233, 234, 235, 236, 237, 238, 239, \
481 240, 241, 242, 243, 244, 245, 246, \
482 \
483 254, 255, 256, 257, 261, 262 \
484 }
485
486 /* As a convenience, we put this nearby, for ease of comparison.
487 First, call-clobbered registers in reverse order of assignment as
488 parameters (also the top ones; not because they're parameters, but
489 for continuity).
490
491 Second, saved registers that go on the register-stack.
492
493 Third, special registers rH, rR and rJ. They should not normally be
494 allocated, but since they're call-clobbered, it is cheaper to use one
495 of them than using a call-saved register for a call-clobbered use,
496 assuming it is referenced a very limited number of times. Other global
497 and fixed registers come next; they are never allocated. */
498 #define MMIX_GNU_ABI_REG_ALLOC_ORDER \
499 { 252, 251, 250, 249, 248, 247, 246, \
500 245, 244, 243, 242, 241, 240, 239, 238, \
501 237, 236, 235, 234, 233, 232, 231, \
502 \
503 0, 1, 2, 3, 4, 5, 6, 7, \
504 8, 9, 10, 11, 12, 13, 14, 15, \
505 16, 17, 18, 19, 20, 21, 22, 23, \
506 24, 25, 26, 27, 28, 29, 30, 31, \
507 \
508 253, \
509 \
510 258, 260, 259, \
511 \
512 32, 33, 34, 35, 36, 37, 38, 39, \
513 40, 41, 42, 43, 44, 45, 46, 47, \
514 48, 49, 50, 51, 52, 53, 54, 55, \
515 56, 57, 58, 59, 60, 61, 62, 63, \
516 64, 65, 66, 67, 68, 69, 70, 71, \
517 72, 73, 74, 75, 76, 77, 78, 79, \
518 80, 81, 82, 83, 84, 85, 86, 87, \
519 88, 89, 90, 91, 92, 93, 94, 95, \
520 96, 97, 98, 99, 100, 101, 102, 103, \
521 104, 105, 106, 107, 108, 109, 110, 111, \
522 112, 113, 114, 115, 116, 117, 118, 119, \
523 120, 121, 122, 123, 124, 125, 126, 127, \
524 128, 129, 130, 131, 132, 133, 134, 135, \
525 136, 137, 138, 139, 140, 141, 142, 143, \
526 144, 145, 146, 147, 148, 149, 150, 151, \
527 152, 153, 154, 155, 156, 157, 158, 159, \
528 160, 161, 162, 163, 164, 165, 166, 167, \
529 168, 169, 170, 171, 172, 173, 174, 175, \
530 176, 177, 178, 179, 180, 181, 182, 183, \
531 184, 185, 186, 187, 188, 189, 190, 191, \
532 192, 193, 194, 195, 196, 197, 198, 199, \
533 200, 201, 202, 203, 204, 205, 206, 207, \
534 208, 209, 210, 211, 212, 213, 214, 215, \
535 216, 217, 218, 219, 220, 221, 222, 223, \
536 224, 225, 226, 227, 228, 229, 230, \
537 \
538 254, 255, 256, 257, 261, 262 \
539 }
540
541 /* The default one. */
542 #define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER
543
544 /* Node: Values in Registers */
545
546 #define HARD_REGNO_NREGS(REGNO, MODE) \
547 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
548 / UNITS_PER_WORD)
549
550 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
551
552 /* Note that no register can really be accessed in single-float mode, so
553 we *can* say 1 here. FIXME: Will TRT happen for single-float, or do
554 we have to punt to libgcc1.asm? */
555 #define MODES_TIEABLE_P(MODE1, MODE2) 1
556
557
558 /* Node: Leaf Functions */
559 /* (empty) */
560
561
562 /* Node: Register Classes */
563
564 enum reg_class
565 {
566 NO_REGS, GENERAL_REGS, REMAINDER_REG, HIMULT_REG,
567 SYSTEM_REGS, ALL_REGS, LIM_REG_CLASSES
568 };
569
570 #define N_REG_CLASSES (int) LIM_REG_CLASSES
571
572 #define REG_CLASS_NAMES \
573 {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG", \
574 "SYSTEM_REGS", "ALL_REGS"}
575
576 /* Note that the contents of each item is always 32 bits. */
577 #define REG_CLASS_CONTENTS \
578 {{0, 0, 0, 0, 0, 0, 0, 0, 0}, \
579 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20}, \
580 {0, 0, 0, 0, 0, 0, 0, 0, 0x10}, \
581 {0, 0, 0, 0, 0, 0, 0, 0, 4}, \
582 {0, 0, 0, 0, 0, 0, 0, 0, 0x7f}, \
583 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x7f}}
584
585 #define REGNO_REG_CLASS(REGNO) \
586 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
587 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
588 ? GENERAL_REGS \
589 : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG \
590 : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS)
591
592 #define BASE_REG_CLASS GENERAL_REGS
593
594 #define INDEX_REG_CLASS GENERAL_REGS
595
596 #define REG_CLASS_FROM_LETTER(CHAR) \
597 ((CHAR) == 'x' ? SYSTEM_REGS \
598 : (CHAR) == 'y' ? REMAINDER_REG \
599 : (CHAR) == 'z' ? HIMULT_REG : NO_REGS)
600
601 #define REGNO_OK_FOR_BASE_P(REGNO) \
602 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
603 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
604 || (reg_renumber[REGNO] > 0 \
605 && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER))
606
607 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO)
608
609 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
610 mmix_preferred_reload_class (X, CLASS)
611
612 #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
613 mmix_preferred_output_reload_class (X, CLASS)
614
615 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
616 mmix_secondary_reload_class (CLASS, MODE, X, 1)
617
618 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
619 mmix_secondary_reload_class (CLASS, MODE, X, 0)
620
621 #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE)
622
623 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
624 mmix_const_ok_for_letter_p (VALUE, C)
625
626 #define EXTRA_CONSTRAINT(VALUE, C) \
627 mmix_extra_constraint (VALUE, C, MMIX_REG_OK_STRICT)
628
629 /* Do we need anything serious here? Yes, any FLOT constant. */
630 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
631 mmix_const_double_ok_for_letter_p (VALUE, C)
632
633
634 /* Node: Frame Layout */
635
636 #define STACK_GROWS_DOWNWARD
637 #define FRAME_GROWS_DOWNWARD
638
639 #define STARTING_FRAME_OFFSET \
640 mmix_starting_frame_offset ()
641
642 #define FIRST_PARM_OFFSET(FUNDECL) 0
643
644 #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \
645 mmix_dynamic_chain_address (FRAMEADDR)
646
647 /* FIXME: It seems RETURN_ADDR_OFFSET is undocumented. */
648
649 #define SETUP_FRAME_ADDRESSES() \
650 mmix_setup_frame_addresses ()
651
652 #define RETURN_ADDR_RTX(COUNT, FRAME) \
653 mmix_return_addr_rtx (COUNT, FRAME)
654
655 /* It's in rJ before we store it somewhere. */
656 #define INCOMING_RETURN_ADDR_RTX \
657 gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
658
659 /* FIXME: This does not seem properly documented or cross-indexed.
660 Nowhere except in the code does it say it *has* to be in the range
661 0..255, or else it will be truncated. That goes for the default too. */
662 #define DWARF_FRAME_RETURN_COLUMN \
663 DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
664
665 /* No return address is stored there. */
666 #define INCOMING_FRAME_SP_OFFSET 0
667
668 /* Node: Stack Checking */
669 /* (empty) */
670
671
672 /* Node: Exception Handling */
673
674 #define EH_RETURN_DATA_REGNO(N) \
675 mmix_eh_return_data_regno (N)
676
677 #define EH_RETURN_STACKADJ_RTX \
678 mmix_eh_return_stackadj_rtx ()
679
680 #define EH_RETURN_HANDLER_RTX \
681 mmix_eh_return_handler_rtx ()
682
683 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
684 mmix_asm_preferred_eh_data_format (CODE, GLOBAL)
685
686 /* Node: Frame Registers */
687 #define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM
688
689 /* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on
690 what register we want to use. */
691 #define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM
692 #define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM
693
694 #define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM
695
696
697 /* Node: Elimination */
698 /* FIXME: Is this requirement built-in? Anyway, we should try to get rid
699 of it; we can deduce the value. */
700 #define FRAME_POINTER_REQUIRED (nonlocal_goto_stack_level != NULL_RTX)
701
702 /* The frame-pointer is stored in a location that either counts to the
703 offset of incoming parameters, or that counts to the offset of the
704 frame, so we can't use a single offset. We therefore eliminate those
705 two separately. */
706 #define ELIMINABLE_REGS \
707 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
708 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
709 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
710
711 /* We need not worry about when the frame-pointer is required for other
712 reasons; GCC takes care of those cases. */
713 #define CAN_ELIMINATE(FROM, TO) 1
714
715 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
716 (OFFSET) = mmix_initial_elimination_offset (FROM, TO)
717
718
719 /* Node: Stack Arguments */
720
721 #define ACCUMULATE_OUTGOING_ARGS 1
722
723 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0
724
725
726 /* Node: Register Arguments */
727 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
728 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 0)
729
730 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
731 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 1)
732
733 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
734 mmix_function_arg_pass_by_reference (&(CUM), MODE, TYPE, NAMED)
735
736 /* This *sounds* good, but does not seem to be implemented correctly to
737 be a win; at least it wasn't in 2.7.2. FIXME: Check and perhaps
738 replace with a big comment.
739 The definition needs to match or be a subset of
740 FUNCTION_ARG_PASS_BY_REFERENCE, since not all callers check that before
741 usage. Watch lots of C++ test-cases fail if set to 1, for example
742 g++.dg/init/byval1.C. */
743 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) \
744 mmix_function_arg_pass_by_reference (&(CUM), MODE, TYPE, NAMED)
745
746 typedef struct { int regs; int lib; } CUMULATIVE_ARGS;
747
748 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
749 ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0))
750
751 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
752 ((CUM).regs \
753 = ((MUST_PASS_IN_STACK (MODE, TYPE)) \
754 || (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE) > 8 \
755 && !TARGET_LIBFUNC && !(CUM).lib)) \
756 ? (MMIX_MAX_ARGS_IN_REGS) + 1 \
757 : (CUM).regs + (7 + (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE))) / 8)
758
759 #define FUNCTION_ARG_REGNO_P(REGNO) \
760 mmix_function_arg_regno_p (REGNO, 0)
761
762 #define FUNCTION_INCOMING_ARG_REGNO_P(REGNO) \
763 mmix_function_arg_regno_p (REGNO, 1)
764
765
766 /* Node: Register Arguments */
767
768 #define FUNCTION_VALUE(VALTYPE, FUNC) \
769 gen_rtx_REG (TYPE_MODE (VALTYPE), MMIX_RETURN_VALUE_REGNUM)
770
771 /* This needs to take care of the register hole for complex return values. */
772 #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) \
773 mmix_function_outgoing_value (VALTYPE, FUNC)
774
775 #define LIBCALL_VALUE(MODE) \
776 gen_rtx_REG (MODE, MMIX_RETURN_VALUE_REGNUM)
777
778 #define FUNCTION_VALUE_REGNO_P(REGNO) \
779 mmix_function_value_regno_p (REGNO)
780
781
782 /* Node: Aggregate Return */
783
784 #define STRUCT_VALUE_REGNUM MMIX_STRUCT_VALUE_REGNUM
785
786
787 /* Node: Caller Saves */
788 /* (empty) */
789
790
791 /* Node: Function Entry */
792
793 /* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and
794 TARGET_ASM_FUNCTION_EPILOGUE. */
795
796 /* We need to say that the epilogue uses the return address, so the
797 initial-value machinery restores it. FIXME: Some targets
798 conditionalize on "reload_completed &&". Investigate difference.
799 FIXME: Not needed if nonlocal_goto_stack_level. */
800 #define EPILOGUE_USES(REGNO) \
801 ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
802
803 /* Node: Profiling */
804 #define FUNCTION_PROFILER(FILE, LABELNO) \
805 mmix_function_profiler (FILE, LABELNO)
806
807 /* Node: Varargs */
808
809 /* For the moment, let's stick to pushing argument registers on the stack.
810 Later, we can parse all arguments in registers, to improve
811 performance. */
812 #define SETUP_INCOMING_VARARGS(A, M, T, P, S) \
813 mmix_setup_incoming_varargs(&(A), M, T, &(P), S)
814
815 /* FIXME: This and other EXPAND_BUILTIN_VA_... target macros are not
816 documented, although used by several targets. */
817 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
818 mmix_expand_builtin_va_arg (VALIST, TYPE)
819
820 /* Node: Trampolines */
821
822 #define TRAMPOLINE_TEMPLATE(FILE) \
823 mmix_trampoline_template (FILE)
824
825 #define TRAMPOLINE_SIZE mmix_trampoline_size
826 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
827 mmix_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
828
829
830 /* Node: Library Calls */
831
832 #define TARGET_MEM_FUNCTIONS
833
834
835 /* Node: Addressing Modes */
836
837 #define CONSTANT_ADDRESS_P(X) \
838 mmix_constant_address_p (X)
839
840 #define MAX_REGS_PER_ADDRESS 2
841
842 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
843 if (mmix_legitimate_address (MODE, X, MMIX_REG_OK_STRICT)) \
844 goto LABEL
845
846 #ifndef REG_OK_STRICT
847 # define REG_OK_FOR_BASE_P(X) \
848 (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \
849 || REGNO (X) == MMIX_ARG_POINTER_REGNUM \
850 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
851 #else
852 # define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
853 #endif /* REG_OK_STRICT */
854
855 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
856
857 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
858
859 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
860
861 #define LEGITIMATE_CONSTANT_P(X) \
862 mmix_legitimate_constant_p (X)
863
864
865 /* Node: Condition Code */
866
867 #define SELECT_CC_MODE(OP, X, Y) \
868 mmix_select_cc_mode (OP, X, Y)
869
870 /* A definition of CANONICALIZE_COMPARISON that changed LE and GT
871 comparisons with -1 to LT and GE respectively, and LT, LTU, GE or GEU
872 comparisons with 256 to 255 and LE, LEU, GT and GTU has been
873 ineffective; the code path for performing the changes did not trig for
874 neither the GCC test-suite nor ghostscript-6.52 nor Knuth's mmix.tar.gz
875 itself (core GCC functionality supposedly handling it) with sources
876 from 2002-06-06. */
877
878 #define REVERSIBLE_CC_MODE(MODE) \
879 mmix_reversible_cc_mode (MODE)
880
881
882 /* Node: Costs */
883
884 /* This one takes on both the RTX_COSTS and CONST_COSTS tasks. */
885 #define DEFAULT_RTX_COSTS(X, CODE, OUTER_CODE) \
886 { \
887 int mmix_rtx_cost; \
888 if (mmix_rtx_cost_recalculated (X, CODE, OUTER_CODE, \
889 &mmix_rtx_cost)) \
890 return mmix_rtx_cost; \
891 }
892
893 #define ADDRESS_COST(ADDRESS) mmix_address_cost (ADDRESS)
894
895 /* The special registers can only move to and from general regs, and we
896 need to check that their constraints match, so say 3 for them. */
897 /* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2)
898 miscompiles reload1.c:reload_cse_simplify_set; a call to
899 reload_cse_regno_equal_p is missing when checking if a substitution of
900 a register setting is valid if this is defined to just the expression
901 in mmix_register_move_cost.
902
903 Symptom: a (all?) register setting is optimized away for e.g.
904 "char *p1(char *p) { return p+1; }" and the value of register zero ($0)
905 is returned.
906
907 We can workaround by making this a function call - unknown if this
908 causes dire speed effects. */
909 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
910 mmix_register_move_cost (MODE, FROM, TO)
911
912 #define SLOW_BYTE_ACCESS 0
913
914
915 /* Node: Sections */
916
917 /* This must be a constant string, since it's used in crtstuff.c. */
918 #define TEXT_SECTION_ASM_OP \
919 "\t.text ! mmixal:= 9H LOC 8B"
920
921 /* FIXME: Not documented. */
922 #define DATA_SECTION_ASM_OP \
923 mmix_data_section_asm_op ()
924
925 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata"
926
927 /* Node: PIC */
928 /* (empty) */
929
930
931 /* Node: File Framework */
932
933 #define ASM_FILE_START(STREAM) \
934 mmix_asm_file_start (STREAM)
935
936 #define ASM_FILE_END(STREAM) \
937 mmix_asm_file_end (STREAM)
938
939 /* While any other punctuation character but ";" would do, we prefer "%"
940 or "!"; "!" is an unary operator and so will not be mistakenly included
941 in correctly formed expressions. The hash character adds mass; catches
942 the eye. We can't have it as a comment char by itself, since it's a
943 hex-number prefix. */
944 #define ASM_COMMENT_START "!#"
945
946 /* These aren't currently functional. We just keep them as markers. */
947 #define ASM_APP_ON "%APP\n"
948 #define ASM_APP_OFF "%NO_APP\n"
949
950 #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \
951 mmix_asm_output_source_filename (STREAM, NAME)
952
953 #define OUTPUT_QUOTED_STRING(STREAM, STRING) \
954 mmix_output_quoted_string (STREAM, STRING, strlen (STRING))
955
956 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) \
957 mmix_asm_output_source_line (STREAM, LINE)
958
959 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
960
961
962 /* Node: Data Output */
963
964 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \
965 mmix_asm_output_ascii (STREAM, PTR, LEN)
966
967 /* Node: Uninitialized Data */
968
969 #define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \
970 mmix_asm_output_aligned_common (ST, N, S, A)
971
972 #define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \
973 mmix_asm_output_aligned_local (ST, N, S, A)
974
975
976 /* Node: Label Output */
977
978 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
979 mmix_asm_output_label (STREAM, NAME)
980
981 #define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \
982 mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME)
983
984 #define GLOBAL_ASM_OP "\t.global "
985
986 #define ASM_WEAKEN_LABEL(STREAM, NAME) \
987 mmix_asm_weaken_label (STREAM, NAME)
988
989 #define MAKE_DECL_ONE_ONLY(DECL) \
990 mmix_make_decl_one_only (DECL)
991
992 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
993 mmix_asm_output_labelref (STREAM, NAME)
994
995 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
996 mmix_asm_output_internal_label (STREAM, PREFIX, NUM)
997
998 /* We insert a ":" to disambiguate against user symbols like L5. */
999 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
1000 sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM))
1001
1002 /* Insert "::"; these are rarer than internal labels. FIXME: Make sure no
1003 ":" is seen in the object file; we don't really want that mmixal
1004 feature visible there. We don't want the default, which uses a dot;
1005 that'd be incompatible with mmixal. */
1006 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
1007 ((OUTPUT) = (char *) alloca (strlen ((NAME)) + 2 + 10), \
1008 sprintf ((OUTPUT), "%s::%d", (NAME), (LABELNO)))
1009
1010 #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \
1011 mmix_asm_output_def (STREAM, NAME, VALUE)
1012
1013 /* Node: Macros for Initialization */
1014 /* We're compiling to ELF and linking to MMO; fundamental ELF features
1015 that GCC depend on are there. */
1016
1017 /* These must be constant strings, since they're used in crtstuff.c. */
1018 #define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible"
1019
1020 #define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible"
1021
1022 #define OBJECT_FORMAT_ELF
1023
1024
1025 /* Node: Instruction Output */
1026
1027 /* The non-$ register names must be prefixed with ":", since they're
1028 affected by PREFIX. We provide the non-colon names as additional
1029 names. */
1030 #define REGISTER_NAMES \
1031 {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \
1032 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \
1033 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \
1034 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31", \
1035 "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39", \
1036 "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47", \
1037 "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55", \
1038 "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63", \
1039 "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71", \
1040 "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79", \
1041 "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87", \
1042 "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95", \
1043 "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103", \
1044 "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111", \
1045 "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119", \
1046 "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127", \
1047 "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135", \
1048 "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143", \
1049 "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151", \
1050 "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159", \
1051 "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167", \
1052 "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175", \
1053 "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183", \
1054 "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191", \
1055 "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199", \
1056 "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207", \
1057 "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215", \
1058 "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223", \
1059 "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231", \
1060 "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239", \
1061 "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247", \
1062 "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255", \
1063 ":rD", ":rE", ":rH", ":rJ", ":rR", "ap_!BAD!", ":rO"}
1064
1065 #define ADDITIONAL_REGISTER_NAMES \
1066 {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257}, \
1067 {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}, {"rO", MMIX_rO_REGNUM}}
1068
1069 #define PRINT_OPERAND(STREAM, X, CODE) \
1070 mmix_print_operand (STREAM, X, CODE)
1071
1072 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
1073 mmix_print_operand_punct_valid_p (CODE)
1074
1075 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
1076 mmix_print_operand_address (STREAM, X)
1077
1078 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
1079 mmix_asm_output_reg_push (STREAM, REGNO)
1080
1081 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
1082 mmix_asm_output_reg_pop (STREAM, REGNO)
1083
1084
1085 /* Node: Dispatch Tables */
1086
1087 /* We define both types, since SImode is the better, but DImode the only
1088 possible for mmixal so that's the one actually used. */
1089 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
1090 mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL)
1091
1092 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
1093 mmix_asm_output_addr_vec_elt (STREAM, VALUE)
1094
1095
1096 /* Node: Exception Region Output */
1097 /* (empty) */
1098
1099 /* Node: Alignment Output */
1100
1101 #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
1102 mmix_asm_output_skip (STREAM, NBYTES)
1103
1104 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
1105 mmix_asm_output_align (STREAM, POWER)
1106
1107
1108 /* Node: All Debuggers */
1109
1110 #define DBX_REGISTER_NUMBER(REGNO) \
1111 mmix_dbx_register_number (REGNO)
1112
1113
1114 /* Node: DBX Options */
1115 /* (empty) */
1116 /* Node: DBX Hooks */
1117 /* (empty) */
1118 /* Node: File Names and DBX */
1119 /* (empty) */
1120
1121
1122 /* Node: SDB and DWARF */
1123 #define DWARF2_DEBUGGING_INFO 1
1124 #define DWARF2_ASM_LINE_DEBUG_INFO 1
1125
1126 /* Node: Misc */
1127
1128 #define PREDICATE_CODES \
1129 {"mmix_reg_cc_operand", {SUBREG, REG}}, \
1130 {"mmix_foldable_comparison_operator", \
1131 {NE, EQ, GE, GT, LE, LT}}, \
1132 /* All '<', actually. */ \
1133 {"mmix_comparison_operator", \
1134 {NE, EQ, GE, GT, LE, LT, GEU, GTU, LEU, \
1135 LTU, UNORDERED, ORDERED, UNEQ, UNGE, UNLE, \
1136 UNLT, LTGT}}, \
1137 {"mmix_symbolic_or_address_operand", \
1138 {SYMBOL_REF, LABEL_REF, CONST, \
1139 SUBREG, REG, PLUS}}, \
1140 {"mmix_reg_or_constant_operand", \
1141 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1142 {"mmix_reg_or_8bit_operand", \
1143 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1144 {"mmix_reg_or_0_operand", \
1145 {CONST_INT, CONST_DOUBLE, SUBREG, REG}},
1146
1147 #define SPECIAL_MODE_PREDICATES "mmix_symbolic_or_address_operand",
1148
1149 /* There's no way to get a PC-relative offset into tables for SImode, so
1150 for the moment we have absolute entries in DImode.
1151 When we're going ELF, these should be SImode and 1. */
1152 #define CASE_VECTOR_MODE DImode
1153 #define CASE_VECTOR_PC_RELATIVE 0
1154
1155 #define WORD_REGISTER_OPERATIONS
1156
1157 /* We have a choice, which makes this yet another parameter to tweak. The
1158 gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent
1159 than "unsigned int", and we have signed characters. FIXME: measure. */
1160 #define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND)
1161
1162 #define MOVE_MAX 8
1163
1164 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1165
1166 /* We have a choice here too. */
1167 #if 0
1168 /* FIXME: Revisit, we don't have scc expanders yet. */
1169 #define STORE_FLAG_VALUE 1
1170 #endif
1171
1172 #define Pmode DImode
1173
1174 #define FUNCTION_MODE QImode
1175
1176 #define NO_IMPLICIT_EXTERN_C
1177
1178 #define HANDLE_SYSV_PRAGMA 1
1179
1180 /* These are checked. */
1181 #define DOLLARS_IN_IDENTIFIERS 0
1182 #define NO_DOLLAR_IN_LABEL
1183 #define NO_DOT_IN_LABEL
1184
1185 /* Calculate the highest used supposed saved stack register. */
1186 #define MACHINE_DEPENDENT_REORG(INSN) \
1187 mmix_machine_dependent_reorg (INSN)
1188
1189 #endif /* GCC_MMIX_H */
1190 /*
1191 * Local variables:
1192 * eval: (c-set-style "gnu")
1193 * indent-tabs-mode: t
1194 * End:
1195 */