1 /* Definitions of target machine for GNU compiler, for MMIX.
2 Copyright (C) 2000, 2001 Free Software Foundation, Inc.
3 Contributed by Hans-Peter Nilsson (hp@bitrange.com)
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
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
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 260
51 #define MMIX_ARG_POINTER_REGNUM 261
52 #define MMIX_LAST_REGISTER_FILE_REGNUM 31
54 /* Four registers; "ideally, these registers should be call-clobbered", so
55 just grab a bunch of the common clobbered registers. FIXME: Last
56 registers of return-value should be used, with an error if there's a
57 return-value (that collides in size). */
58 #define MMIX_EH_RETURN_DATA_REGNO_START (MMIX_STRUCT_VALUE_REGNUM - 4)
60 /* Try to keep the definitions from running away on their own. */
61 #if (MMIX_EH_RETURN_DATA_REGNO_START \
62 != MMIX_RESERVED_GNU_ARG_0_REGNUM + MMIX_MAX_ARGS_IN_REGS)
63 #error MMIX register definition inconsistency
66 #if (MMIX_MAX_REGS_FOR_VALUE + MMIX_MAX_ARGS_IN_REGS > 32)
67 #error MMIX parameters and return values bad, more than 32 registers
70 /* This chosen as "a call-clobbered hard register that is otherwise
71 untouched by the epilogue". */
72 #define MMIX_EH_RETURN_STACKADJ_REGNUM MMIX_STATIC_CHAIN_REGNUM
75 # define MMIX_REG_OK_STRICT 1
77 # define MMIX_REG_OK_STRICT 0
80 #define MMIX_FUNCTION_ARG_SIZE(MODE, TYPE) \
81 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) : int_size_in_bytes (TYPE))
83 /* Declarations for helper variables that are not tied to a particular
85 extern struct rtx_def
*mmix_compare_op0
;
86 extern struct rtx_def
*mmix_compare_op1
;
88 /* Per-function machine data. This is normally an opaque type just
89 defined and used in the tm.c file, but we need to see the definition in
91 struct machine_function
93 int has_call_value_without_parameters
;
97 /* For these target macros, there is no generic documentation here. You
98 should read `Using and Porting GCC' for that. Only comments specific
99 to the MMIX target are here.
101 There are however references to the specific texinfo node (comments
102 with "Node:"), so there should be little or nothing amiss. Probably
103 the opposite, since we don't have to care about old littering and
104 soon outdated generic comments. */
108 /* When both ABI:s work, this is how we tell them apart in code. The
109 GNU abi is implied the default. Also implied in TARGET_DEFAULT. */
111 "%{mabi=gnu:-D__MMIX_ABI_GNU__\
113 %eoptions -mabi=mmixware and -mabi=gnu are mutually exclusive}}\
114 %{!mabi=gnu:-D__MMIX_ABI_MMIXWARE__}"
116 /* User symbols are in the same name-space as built-in symbols, but we
117 don't need the built-in symbols, so remove those and instead apply
118 stricter operand checking. Don't warn when expanding insns. */
119 #define ASM_SPEC "-no-predefined-syms -x"
121 /* Pass on -mset-program-start=N and -mset-data-start=M to the linker.
122 Provide default program start 0x100 unless -mno-set-program-start.
123 Link to ELF if requested. */
125 "%{mset-program-start=*:--defsym __.MMIX.start..text=%*}\
126 %{mset-data-start=*:--defsym __.MMIX.start..data=%*}\
127 %{!mset-program-start=*:\
128 %{!mno-set-program-start:--defsym __.MMIX.start..text=0x100}}\
129 %{!melf:-m mmo}%{melf:-m elf64mmix}"
131 /* Put unused option values here. */
132 extern const char *mmix_cc1_ignored_option
;
134 #define TARGET_OPTIONS \
135 {{"set-program-start=", &mmix_cc1_ignored_option, \
136 N_("Set start-address of the program") }, \
137 {"set-data-start=", &mmix_cc1_ignored_option, \
138 N_("Set start-address of data")}}
140 /* FIXME: There's no provision for profiling here. */
141 #define STARTFILE_SPEC \
142 "crti%O%s crtbegin%O%s"
144 #define ENDFILE_SPEC "crtend%O%s crtn%O%s"
146 /* Node: Run-time Target */
148 /* Define __LONG_MAX__, since we're advised not to change glimits.h. */
149 #define CPP_PREDEFINES "-D__mmix__ -D__MMIX__ -D__LONG_MAX__=9223372036854775807L"
151 extern int target_flags
;
153 #define TARGET_MASK_LIBFUNCS 1
154 #define TARGET_MASK_ABI_GNU 2
155 #define TARGET_MASK_FCMP_EPSILON 4
156 #define TARGET_MASK_ZERO_EXTEND 8
157 #define TARGET_MASK_KNUTH_DIVISION 16
158 #define TARGET_MASK_TOPLEVEL_SYMBOLS 32
159 #define TARGET_MASK_BRANCH_PREDICT 64
161 /* FIXME: Get rid of this one. */
162 #define TARGET_LIBFUNC (target_flags & TARGET_MASK_LIBFUNCS)
163 #define TARGET_ABI_GNU (target_flags & TARGET_MASK_ABI_GNU)
164 #define TARGET_FCMP_EPSILON (target_flags & TARGET_MASK_FCMP_EPSILON)
165 #define TARGET_ZERO_EXTEND (target_flags & TARGET_MASK_ZERO_EXTEND)
166 #define TARGET_KNUTH_DIVISION (target_flags & TARGET_MASK_KNUTH_DIVISION)
167 #define TARGET_TOPLEVEL_SYMBOLS (target_flags & TARGET_MASK_TOPLEVEL_SYMBOLS)
168 #define TARGET_BRANCH_PREDICT (target_flags & TARGET_MASK_BRANCH_PREDICT)
170 #define TARGET_DEFAULT TARGET_MASK_BRANCH_PREDICT
172 /* FIXME: Provide a way to *load* the epsilon register. */
173 #define TARGET_SWITCHES \
174 {{"libfuncs", TARGET_MASK_LIBFUNCS, \
175 N_("For intrinsics library: pass all parameters in registers")}, \
176 {"no-libfuncs", -TARGET_MASK_LIBFUNCS, ""}, \
177 {"abi=mmixware", -TARGET_MASK_ABI_GNU, \
178 N_("Use register stack for parameters and return value")}, \
179 {"abi=gnu", TARGET_MASK_ABI_GNU, \
180 N_("Use call-clobbered registers for parameters and return value")}, \
181 {"epsilon", TARGET_MASK_FCMP_EPSILON, \
182 N_("Use epsilon-respecting floating point compare instructions")}, \
183 {"no-epsilon", -TARGET_MASK_FCMP_EPSILON, ""}, \
184 {"zero-extend", TARGET_MASK_ZERO_EXTEND, \
185 N_("Use zero-extending memory loads, not sign-extending ones")}, \
186 {"no-zero-extend", -TARGET_MASK_ZERO_EXTEND, ""}, \
187 {"knuthdiv", TARGET_MASK_KNUTH_DIVISION, \
188 N_("Generate divide results with reminder having the same sign as the\
189 divisor (not the dividend)")}, \
190 {"no-knuthdiv", -TARGET_MASK_KNUTH_DIVISION, ""}, \
191 {"toplevel-symbols", TARGET_MASK_TOPLEVEL_SYMBOLS, \
192 N_("Prepend global symbols with \":\" (for use with PREFIX)")}, \
193 {"no-toplevel-symbols", -TARGET_MASK_TOPLEVEL_SYMBOLS, \
194 N_("Do not provide a default start-address 0x100 of the program")}, \
196 N_("Link to emit program in ELF format (rather than mmo)")}, \
197 {"branch-predict", TARGET_MASK_BRANCH_PREDICT, \
198 N_("Use P-mnemonics for branches statically predicted as taken")}, \
199 {"no-branch-predict", -TARGET_MASK_BRANCH_PREDICT, \
200 N_("Don't use P-mnemonics for branches")}, \
201 {"", TARGET_DEFAULT, ""}}
203 /* Unfortunately, this must not reference anything in "mmix.c". */
204 #define TARGET_VERSION \
205 fprintf (stderr, " (MMIX)")
207 #define OVERRIDE_OPTIONS mmix_override_options ()
209 #define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \
213 flag_regmove = TRUE; \
215 if (SIZE || LEVEL > 1) \
217 flag_omit_frame_pointer = TRUE; \
218 flag_strength_reduce = FALSE; \
223 /* This one will have to wait a little bit; right now we can't debug
224 neither with or without a frame-pointer. */
225 /* #define CAN_DEBUG_WITHOUT_FP */
228 /* Node: Per-Function Data */
229 #define INIT_EXPANDERS mmix_init_expanders ()
232 /* Node: Storage Layout */
233 /* I see no bitfield instructions. Anyway, the common order is from low
234 to high, as the power of two, hence little-endian. */
235 #define BITS_BIG_ENDIAN 0
236 #define BYTES_BIG_ENDIAN 1
237 #define WORDS_BIG_ENDIAN 1
238 #define FLOAT_WORDS_BIG_ENDIAN 1
239 #define BITS_PER_UNIT 8
240 #define BITS_PER_WORD 64
241 #define UNITS_PER_WORD 8
242 #define POINTER_SIZE 64
244 /* FIXME: This macro is correlated to MAX_FIXED_MODE_SIZE in that
245 e.g. this macro must not be 8 (default, UNITS_PER_WORD) when
246 MAX_FIXED_MODE_SIZE is 64 (default, DImode), or really: this must be
247 set manually if MAX_FIXED_MODE_SIZE is not at least twice the register
248 size. By setting it to 4, we don't have to worry about TImode things
249 yet. Revisit, perhaps get TImode going or get some solution that does
250 not mandate TImode or lie in other ways. */
251 #define MIN_UNITS_PER_WORD 4
253 /* FIXME: Promotion of modes currently generates slow code, extending
254 before every operation. */
256 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
258 if (GET_MODE_CLASS (MODE) == MODE_INT \
259 && GET_MODE_SIZE (MODE) < 8) \
262 /* Do the following some time later, \
263 scrutinizing differences. */ \
264 if (0) (UNSIGNEDP) = 0; \
268 #define PROMOTE_FUNCTION_ARGS
271 /* Apparently not doing TRT if int < register-size. FIXME: Perhaps
272 FUNCTION_VALUE and LIBCALL_VALUE needs tweaking as some ports say. */
273 #define PROMOTE_FUNCTION_RETURN
276 /* I'm a little bit undecided about this one. It might be beneficial to
277 promote all operations. */
278 #define PROMOTE_FOR_CALL_ONLY
280 /* We need to align everything to 64 bits that can affect the alignment
281 of other types. Since address N is interpreted in MMIX as (N modulo
282 access_size), we must align. */
283 #define PARM_BOUNDARY 64
284 #define STACK_BOUNDARY 64
285 #define FUNCTION_BOUNDARY 32
286 #define BIGGEST_ALIGNMENT 64
288 /* This one is only used in the ADA front end. */
289 #define MINIMUM_ATOMIC_ALIGNMENT 8
291 /* Copied from elfos.h. */
292 #define MAX_OFILE_ALIGNMENT (32768 * 8)
294 #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
295 mmix_data_alignment (TYPE, BASIC_ALIGN)
297 #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
298 mmix_constant_alignment (CONSTANT, BASIC_ALIGN)
300 #define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \
301 mmix_local_alignment (TYPE, BASIC_ALIGN)
303 /* Following other ports, this seems to most commonly be the word-size,
304 so let's do that here too. */
305 #define EMPTY_FIELD_BOUNDARY 64
307 /* We chose to have this low solely for similarity with the alpha. It has
308 nothing to do with passing the tests dg/c99-scope-2 and
309 execute/align-1.c. Nothing. Though the tests seem wrong. Padding of
310 the structure is automatically added to get alignment when needed if we
311 set this to just byte-boundary. */
312 #define STRUCTURE_SIZE_BOUNDARY 8
314 /* The lower bits are ignored. */
315 #define STRICT_ALIGNMENT 1
318 /* Node: Type Layout */
320 /* It might seem more natural to have 64-bit ints on a 64-bit machine,
321 but then an occasional MMIX programmer needs to know how to put a lot
322 of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather
323 than the "intuitive" char, short and int types. */
324 #define INT_TYPE_SIZE 32
325 #define SHORT_TYPE_SIZE 16
326 #define LONG_LONG_TYPE_SIZE 64
328 #define FLOAT_TYPE_SIZE 32
329 #define DOUBLE_TYPE_SIZE 64
330 #define LONG_DOUBLE_TYPE_SIZE 64
332 #define DEFAULT_SIGNED_CHAR 1
334 /* I have no rationale for this other than pointing at Alpha. */
335 #define WCHAR_TYPE "unsigned int"
336 #define WCHAR_TYPE_SIZE 32
339 /* Node: Register Basics */
340 /* We tell GCC about all 256 general registers, and we also include
341 rD, rE, rH, rJ and rR (in that order) so we can describe what insns
342 clobber them. We use a faked register for the argument pointer. It is
343 always eliminated towards the frame-pointer or the stack-pointer, never
344 output in assembly. Any fixed register would do for this, like $255,
345 but future debugging is easier when using a separate register. It
346 counts as a global register for pseudorandom reasons. */
347 #define FIRST_PSEUDO_REGISTER 262
349 /* We treat general registers with no assigned purpose as fixed. The
350 stack pointer, $254, is also fixed. Register $255 is referred to as a
351 temporary register in the MMIX papers, and used as such in mmixal, so
352 it should not be used as a stack pointer. We set it to fixed, and use
353 it "manually" at times of despair. */
354 #define FIXED_REGISTERS \
355 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
356 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
357 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
358 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
359 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
360 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
361 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
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, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
370 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, \
374 /* General registers are fixed and therefore "historically" marked
375 call-used. (FIXME: This has changed). Registers $15..$31 are
376 call-clobbered; we'll put arguments in $16 and up, and we need $15 for
377 the MMIX register-stack "hole". */
378 #define CALL_USED_REGISTERS \
379 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, \
380 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
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, 1, 1, 1, 1, 1, 1, 0, 1, 1, \
398 #define CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage ()
400 /* No LOCAL_REGNO, INCOMING_REGNO or OUTGOING_REGNO, since those macros
401 are not usable for MMIX: it doesn't have a fixed register window size.
402 FIXME: Perhaps we should say something about $0..$15 may sometimes be
403 the incoming $16..$31. Those macros need better documentation; it
404 looks like they're just bogus and that FUNCTION_INCOMING_ARG_REGNO_P
405 and FUNCTION_OUTGOING_VALUE should be used where they're used. For the
406 moment, do nothing; things seem to work anyway. */
409 /* Node: Allocation Order */
411 /* We should allocate registers from 0 to 31 by increasing number, because
412 I think that's what people expect. Beyond that, just use
413 call-clobbered global registers first, then call-clobbered special
414 registers. Last, the fixed registers. */
415 #define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER \
416 { 0, 1, 2, 3, 4, 5, 6, 7, \
417 8, 9, 10, 11, 12, 13, 14, 15, \
418 16, 17, 18, 19, 20, 21, 22, 23, \
419 24, 25, 26, 27, 28, 29, 30, 31, \
421 252, 251, 250, 249, 248, 247, \
422 246, 245, 244, 243, 242, 241, 240, 239, \
423 238, 237, 236, 235, 234, 233, 232, 231, \
429 32, 33, 34, 35, 36, 37, 38, 39, \
430 40, 41, 42, 43, 44, 45, 46, 47, \
431 48, 49, 50, 51, 52, 53, 54, 55, \
432 56, 57, 58, 59, 60, 61, 62, 63, \
433 64, 65, 66, 67, 68, 69, 70, 71, \
434 72, 73, 74, 75, 76, 77, 78, 79, \
435 80, 81, 82, 83, 84, 85, 86, 87, \
436 88, 89, 90, 91, 92, 93, 94, 95, \
437 96, 97, 98, 99, 100, 101, 102, 103, \
438 104, 105, 106, 107, 108, 109, 110, 111, \
439 112, 113, 114, 115, 116, 117, 118, 119, \
440 120, 121, 122, 123, 124, 125, 126, 127, \
441 128, 129, 130, 131, 132, 133, 134, 135, \
442 136, 137, 138, 139, 140, 141, 142, 143, \
443 144, 145, 146, 147, 148, 149, 150, 151, \
444 152, 153, 154, 155, 156, 157, 158, 159, \
445 160, 161, 162, 163, 164, 165, 166, 167, \
446 168, 169, 170, 171, 172, 173, 174, 175, \
447 176, 177, 178, 179, 180, 181, 182, 183, \
448 184, 185, 186, 187, 188, 189, 190, 191, \
449 192, 193, 194, 195, 196, 197, 198, 199, \
450 200, 201, 202, 203, 204, 205, 206, 207, \
451 208, 209, 210, 211, 212, 213, 214, 215, \
452 216, 217, 218, 219, 220, 221, 222, 223, \
453 224, 225, 226, 227, 228, 229, 230, 231, \
454 254, 255, 256, 257, 261 \
457 /* As a convenience, we put this nearby, for ease of comparison.
458 First, call-clobbered registers in reverse order of assignment as
459 parameters (also the top ones; not because they're parameters, but
462 Second, saved registers that go on the register-stack.
464 Third, special registers rH, rR and rJ. They should not normally be
465 allocated, but since they're call-clobbered, it is cheaper to use one
466 of them than using a call-saved register for a call-clobbered use,
467 assuming it is referenced a very limited number of times. Other global
468 and fixed registers come next; they are never allocated. */
469 #define MMIX_GNU_ABI_REG_ALLOC_ORDER \
470 { 252, 251, 250, 249, 248, 247, 246, \
471 245, 244, 243, 242, 241, 240, 239, 238, \
472 237, 236, 235, 234, 233, 232, \
474 0, 1, 2, 3, 4, 5, 6, 7, \
475 8, 9, 10, 11, 12, 13, 14, 15, \
476 16, 17, 18, 19, 20, 21, 22, 23, \
477 24, 25, 26, 27, 28, 29, 30, 31, \
483 32, 33, 34, 35, 36, 37, 38, 39, \
484 40, 41, 42, 43, 44, 45, 46, 47, \
485 48, 49, 50, 51, 52, 53, 54, 55, \
486 56, 57, 58, 59, 60, 61, 62, 63, \
487 64, 65, 66, 67, 68, 69, 70, 71, \
488 72, 73, 74, 75, 76, 77, 78, 79, \
489 80, 81, 82, 83, 84, 85, 86, 87, \
490 88, 89, 90, 91, 92, 93, 94, 95, \
491 96, 97, 98, 99, 100, 101, 102, 103, \
492 104, 105, 106, 107, 108, 109, 110, 111, \
493 112, 113, 114, 115, 116, 117, 118, 119, \
494 120, 121, 122, 123, 124, 125, 126, 127, \
495 128, 129, 130, 131, 132, 133, 134, 135, \
496 136, 137, 138, 139, 140, 141, 142, 143, \
497 144, 145, 146, 147, 148, 149, 150, 151, \
498 152, 153, 154, 155, 156, 157, 158, 159, \
499 160, 161, 162, 163, 164, 165, 166, 167, \
500 168, 169, 170, 171, 172, 173, 174, 175, \
501 176, 177, 178, 179, 180, 181, 182, 183, \
502 184, 185, 186, 187, 188, 189, 190, 191, \
503 192, 193, 194, 195, 196, 197, 198, 199, \
504 200, 201, 202, 203, 204, 205, 206, 207, \
505 208, 209, 210, 211, 212, 213, 214, 215, \
506 216, 217, 218, 219, 220, 221, 222, 223, \
507 224, 225, 226, 227, 228, 229, 230, 231, \
508 254, 255, 256, 257, 261 \
511 /* The default one. */
512 #define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER
514 /* Node: Values in Registers */
516 #define HARD_REGNO_NREGS(REGNO, MODE) \
517 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
520 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
522 /* Note that no register can really be accessed in single-float mode, so
523 we *can* say 1 here. FIXME: Will TRT happen for single-float, or do
524 we have to punt to libgcc1.asm? */
525 #define MODES_TIEABLE_P(MODE1, MODE2) 1
528 /* Node: Leaf Functions */
532 /* Node: Register Classes */
536 NO_REGS
, GENERAL_REGS
, REMAINDER_REG
, HIMULT_REG
,
537 SYSTEM_REGS
, ALL_REGS
, LIM_REG_CLASSES
540 #define N_REG_CLASSES (int) LIM_REG_CLASSES
542 #define REG_CLASS_NAMES \
543 {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG", \
544 "SYSTEM_REGS", "ALL_REGS"}
546 /* Note that the contents of each item is always 32 bits. */
547 #define REG_CLASS_CONTENTS \
548 {{0, 0, 0, 0, 0, 0, 0, 0, 0}, \
549 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20}, \
550 {0, 0, 0, 0, 0, 0, 0, 0, 0x10}, \
551 {0, 0, 0, 0, 0, 0, 0, 0, 4}, \
552 {0, 0, 0, 0, 0, 0, 0, 0, 0x3f}, \
553 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x3f}}
555 #define REGNO_REG_CLASS(REGNO) \
556 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
557 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
559 : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG \
560 : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS)
562 #define BASE_REG_CLASS GENERAL_REGS
564 #define INDEX_REG_CLASS GENERAL_REGS
566 #define REG_CLASS_FROM_LETTER(CHAR) \
567 ((CHAR) == 'x' ? SYSTEM_REGS \
568 : (CHAR) == 'y' ? REMAINDER_REG \
569 : (CHAR) == 'z' ? HIMULT_REG : NO_REGS)
571 #define REGNO_OK_FOR_BASE_P(REGNO) \
572 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
573 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
574 || (reg_renumber[REGNO] > 0 \
575 && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER))
577 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO)
579 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
580 mmix_preferred_reload_class (X, CLASS)
582 #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
583 mmix_preferred_output_reload_class (X, CLASS)
585 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
586 mmix_secondary_reload_class (CLASS, MODE, X, 1)
588 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
589 mmix_secondary_reload_class (CLASS, MODE, X, 0)
591 #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE)
593 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
594 mmix_const_ok_for_letter_p (VALUE, C)
596 #define EXTRA_CONSTRAINT(VALUE, C) \
597 mmix_extra_constraint (VALUE, C, MMIX_REG_OK_STRICT)
599 /* Do we need anything serious here? Yes, any FLOT constant. */
600 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
601 mmix_const_double_ok_for_letter_p (VALUE, C)
604 /* Node: Frame Layout */
606 #define STACK_GROWS_DOWNWARD
607 #define FRAME_GROWS_DOWNWARD
609 #define STARTING_FRAME_OFFSET \
610 mmix_starting_frame_offset ()
612 /* There is a stack slot between the frame-pointer and the first
613 parameter, where the return address is sometimes stored. FIXME:
615 #define FIRST_PARM_OFFSET(FUNDECL) 8
617 #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \
618 mmix_dynamic_chain_address (FRAMEADDR)
620 /* FIXME: It seems RETURN_ADDR_OFFSET is undocumented. */
622 #define SETUP_FRAME_ADDRESSES() \
623 mmix_setup_frame_addresses ()
625 #define RETURN_ADDR_RTX(COUNT, FRAME) \
626 mmix_return_addr_rtx (COUNT, FRAME)
628 /* It's in rJ before we store it somewhere. */
629 #define INCOMING_RETURN_ADDR_RTX \
630 gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
632 /* FIXME: This does not seem properly documented or cross-indexed.
633 Nowhere except in the code does it say it *has* to be in the range
634 0..255, or else it will be truncated. That goes for the default too. */
635 #define DWARF_FRAME_RETURN_COLUMN \
636 DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
638 /* No return address is stored there. */
639 #define INCOMING_FRAME_SP_OFFSET 0
641 /* Node: Stack Checking */
645 /* Node: Exception Handling */
647 #define EH_RETURN_DATA_REGNO(N) \
648 mmix_eh_return_data_regno (N)
650 #define EH_RETURN_STACKADJ_RTX \
651 mmix_eh_return_stackadj_rtx ()
653 #define EH_RETURN_HANDLER_RTX \
654 mmix_eh_return_handler_rtx ()
656 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
657 mmix_asm_preferred_eh_data_format (CODE, GLOBAL)
659 /* Node: Frame Registers */
660 #define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM
662 /* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on
663 what register we want to use. */
664 #define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM
665 #define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM
667 #define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM
670 /* Node: Elimination */
671 /* FIXME: Is this requirement built-in? Anyway, we should try to get rid
672 of it; we can deduce the value. */
673 #define FRAME_POINTER_REQUIRED (nonlocal_goto_stack_level != NULL_RTX)
675 /* The frame-pointer is stored in a location that either counts to the
676 offset of incoming parameters, or that counts to the offset of the
677 frame, so we can't use a single offset. We therefore eliminate those
679 #define ELIMINABLE_REGS \
680 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
681 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
682 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
684 /* We need not worry about when the frame-pointer is required for other
685 reasons; GCC takes care of those cases. */
686 #define CAN_ELIMINATE(FROM, TO) 1
688 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
689 (OFFSET) = mmix_initial_elimination_offset (FROM, TO);
692 /* Node: Stack Arguments */
694 #define ACCUMULATE_OUTGOING_ARGS 1
696 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0
699 /* Node: Register Arguments */
700 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
701 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 0)
703 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
704 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 1)
706 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
707 mmix_function_arg_pass_by_reference (&(CUM), MODE, TYPE, NAMED)
709 /* This *sounds* good, but does not seem to be implemented correctly to
710 be a win; at least it wasn't in 2.7.2. FIXME: Check and perhaps
711 replace with a big comment. */
712 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) 1
714 typedef struct { int regs
; int lib
; int now_varargs
; } CUMULATIVE_ARGS
;
716 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
717 ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0), (CUM).now_varargs = 0)
719 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
721 = ((MUST_PASS_IN_STACK (MODE, TYPE)) \
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)
727 #define FUNCTION_ARG_REGNO_P(REGNO) \
728 mmix_function_arg_regno_p (REGNO, 0)
730 #define FUNCTION_INCOMING_ARG_REGNO_P(REGNO) \
731 mmix_function_arg_regno_p (REGNO, 1)
734 /* Node: Register Arguments */
736 #define FUNCTION_VALUE(VALTYPE, FUNC) \
737 gen_rtx_REG (TYPE_MODE (VALTYPE), MMIX_RETURN_VALUE_REGNUM)
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)
743 #define LIBCALL_VALUE(MODE) \
744 gen_rtx_REG (MODE, MMIX_OUTGOING_RETURN_VALUE_REGNUM)
746 #define FUNCTION_VALUE_REGNO_P(REGNO) \
747 ((REGNO) == MMIX_OUTGOING_RETURN_VALUE_REGNUM)
750 /* Node: Aggregate Return */
752 #define STRUCT_VALUE_REGNUM MMIX_STRUCT_VALUE_REGNUM
755 /* Node: Caller Saves */
759 /* Node: Function Entry */
761 /* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and
762 TARGET_ASM_FUNCTION_EPILOGUE. */
764 /* We need to say that the epilogue uses the return address, so the
765 initial-value machinery restores it. FIXME: Some targets
766 conditionalize on "reload_completed &&". Investigate difference.
767 FIXME: Not needed if nonlocal_goto_stack_level. */
768 #define EPILOGUE_USES(REGNO) \
769 ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
771 #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
772 mmix_asm_output_mi_thunk (FILE, THUNK_FNDECL, DELTA, FUNCTION)
775 /* Node: Profiling */
776 #define FUNCTION_PROFILER(FILE, LABELNO) \
777 mmix_function_profiler (FILE, LABELNO)
781 /* For the moment, let's stick to pushing argument registers on the stack.
782 Later, we can parse all arguments in registers, to improve
784 #define SETUP_INCOMING_VARARGS(A, M, T, P, S) \
785 mmix_setup_incoming_varargs(&(A), M, T, &(P), S)
787 /* FIXME: This and other EXPAND_BUILTIN_VA_... target macros are not
788 documented, although used by several targets. */
789 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
790 mmix_expand_builtin_va_arg (VALIST, TYPE)
792 /* Node: Trampolines */
794 #define TRAMPOLINE_TEMPLATE(FILE) \
795 mmix_trampoline_template (FILE)
797 #define TRAMPOLINE_SIZE mmix_trampoline_size
798 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
799 mmix_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
802 /* Node: Library Calls */
804 #define TARGET_MEM_FUNCTIONS
807 /* Node: Addressing Modes */
809 #define CONSTANT_ADDRESS_P(X) \
810 mmix_constant_address_p (X)
812 #define MAX_REGS_PER_ADDRESS 2
814 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
815 if (mmix_legitimate_address (MODE, X, MMIX_REG_OK_STRICT)) \
818 #ifndef REG_OK_STRICT
819 # define REG_OK_FOR_BASE_P(X) \
820 (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \
821 || REGNO (X) == MMIX_ARG_POINTER_REGNUM \
822 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
824 # define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
825 #endif /* REG_OK_STRICT */
827 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
829 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
831 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
833 #define LEGITIMATE_CONSTANT_P(X) \
834 mmix_legitimate_constant_p (X)
837 /* Node: Condition Code */
839 #define EXTRA_CC_MODES \
840 CC(CC_UNSmode, "CC_UNS") \
841 CC(CC_FPmode, "CC_FP") \
842 CC(CC_FPEQmode, "CC_FPEQ") \
843 CC(CC_FUNmode, "CC_FUN")
845 #define SELECT_CC_MODE(OP, X, Y) \
846 mmix_select_cc_mode (OP, X, Y)
848 #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) \
849 mmix_canonicalize_comparison (&(CODE), &(OP0), &(OP1));
851 #define REVERSIBLE_CC_MODE(MODE) \
852 mmix_reversible_cc_mode (MODE)
857 /* This one takes on both the RTX_COSTS and CONST_COSTS tasks. */
858 #define DEFAULT_RTX_COSTS(X, CODE, OUTER_CODE) \
861 if (mmix_rtx_cost_recalculated (X, CODE, OUTER_CODE, \
863 return mmix_rtx_cost; \
866 #define ADDRESS_COST(ADDRESS) mmix_address_cost (ADDRESS)
868 /* The special registers can only move to and from general regs, and we
869 need to check that their constraints match, so say 3 for them. */
870 /* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2)
871 miscompiles reload1.c:reload_cse_simplify_set; a call to
872 reload_cse_regno_equal_p is missing when checking if a substitution of
873 a register setting is valid if this is defined to just the expression
874 in mmix_register_move_cost.
876 Symptom: a (all?) register setting is optimized away for e.g.
877 "char *p1(char *p) { return p+1; }" and the value of register zero ($0)
880 We can workaround by making this a function call - unknown if this
881 causes dire speed effects. */
882 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
883 mmix_register_move_cost (MODE, FROM, TO)
885 #define SLOW_BYTE_ACCESS 0
890 /* This must be a constant string, since it's used in crtstuff.c. */
891 #define TEXT_SECTION_ASM_OP \
892 "\t.text ! mmixal:= 9H LOC 8B"
894 /* FIXME: Not documented. */
895 #define DATA_SECTION_ASM_OP \
896 mmix_data_section_asm_op ()
898 /* Stuff copied from elfos.h. */
899 #define EXTRA_SECTIONS in_const
901 #define EXTRA_SECTION_FUNCTIONS \
902 CONST_SECTION_FUNCTION
904 #define READONLY_DATA_SECTION() const_section ()
906 #define CONST_SECTION_ASM_OP "\t.section\t.rodata"
908 #define CONST_SECTION_FUNCTION \
912 if (in_section != in_const) \
914 fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
915 in_section = in_const; \
919 #undef SELECT_RTX_SECTION
920 #define SELECT_RTX_SECTION(MODE, RTX, ALIGN) const_section ()
922 #define SELECT_SECTION(DECL, RELOC, ALIGN) \
923 mmix_select_section (DECL, RELOC, ALIGN)
925 #define ENCODE_SECTION_INFO(DECL) \
926 mmix_encode_section_info (DECL)
928 #define STRIP_NAME_ENCODING(VAR, SYM_NAME) \
929 (VAR) = mmix_strip_name_encoding (SYM_NAME)
931 #define UNIQUE_SECTION(DECL, RELOC) \
932 mmix_unique_section (decl, reloc)
938 /* Node: File Framework */
940 #define ASM_FILE_START(STREAM) \
941 mmix_asm_file_start (STREAM)
943 #define ASM_FILE_END(STREAM) \
944 mmix_asm_file_end (STREAM)
946 #define ASM_IDENTIFY_GCC(STREAM) \
947 mmix_asm_identify_gcc (STREAM)
949 /* While any other punctuation character but ";" would do, we prefer "%"
950 or "!"; "!" is an unary operator and so will not be mistakenly included
951 in correctly formed expressions. The hash character adds mass; catches
952 the eye. We can't have it as a comment char by itself, since it's a
953 hex-number prefix. */
954 #define ASM_COMMENT_START "!#"
956 /* These aren't currently functional. We just keep them as markers. */
957 #define ASM_APP_ON "%APP\n"
958 #define ASM_APP_OFF "%NO_APP\n"
960 #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \
961 mmix_asm_output_source_filename (STREAM, NAME)
963 #define OUTPUT_QUOTED_STRING(STREAM, STRING) \
964 mmix_output_quoted_string (STREAM, STRING, strlen (STRING))
966 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) \
967 mmix_asm_output_source_line (STREAM, LINE)
969 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
972 /* Node: Data Output */
974 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \
975 mmix_asm_output_ascii (STREAM, PTR, LEN)
977 /* Node: Uninitialized Data */
979 #define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \
980 mmix_asm_output_aligned_common (ST, N, S, A)
982 #define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \
983 mmix_asm_output_aligned_local (ST, N, S, A)
986 /* Node: Label Output */
988 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
989 mmix_asm_output_label (STREAM, NAME)
991 #define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \
992 mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME)
994 #define ASM_GLOBALIZE_LABEL(STREAM, NAME) \
995 mmix_asm_globalize_label (STREAM, NAME)
997 #define ASM_WEAKEN_LABEL(STREAM, NAME) \
998 mmix_asm_weaken_label (STREAM, NAME)
1000 #define MAKE_DECL_ONE_ONLY(DECL) \
1001 mmix_make_decl_one_only (DECL)
1003 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
1004 mmix_asm_output_labelref (STREAM, NAME)
1006 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
1007 mmix_asm_output_internal_label (STREAM, PREFIX, NUM)
1009 /* We insert a ":" to disambiguate against user symbols like L5. */
1010 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
1011 sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM))
1013 /* Insert "::"; these are rarer than internal labels. FIXME: Make sure no
1014 ":" is seen in the object file; we don't really want that mmixal
1015 feature visible there. We don't want the default, which uses a dot;
1016 that'd be incompatible with mmixal. */
1017 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
1018 ((OUTPUT) = (char *) alloca (strlen ((NAME)) + 2 + 10), \
1019 sprintf ((OUTPUT), "%s::%d", (NAME), (LABELNO)))
1021 #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \
1022 mmix_asm_output_def (STREAM, NAME, VALUE)
1024 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(STREAM, SY, HI, LO) \
1025 mmix_asm_output_define_label_difference_symbol (STREAM, SY, HI, LO)
1028 /* Node: Macros for Initialization */
1029 /* We're compiling to ELF and linking to MMO; all ELF features that GCC
1030 care for are there. FIXME: Are they? */
1032 /* These must be constant strings, since they're used in crtstuff.c. */
1033 #define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible"
1035 #define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible"
1037 #define OBJECT_FORMAT_ELF
1040 /* Node: Instruction Output */
1042 /* The non-$ register names must be prefixed with ":", since they're
1043 affected by PREFIX. We provide the non-colon names as additional
1045 #define REGISTER_NAMES \
1046 {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \
1047 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \
1048 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \
1049 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31", \
1050 "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39", \
1051 "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47", \
1052 "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55", \
1053 "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63", \
1054 "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71", \
1055 "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79", \
1056 "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87", \
1057 "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95", \
1058 "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103", \
1059 "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111", \
1060 "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119", \
1061 "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127", \
1062 "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135", \
1063 "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143", \
1064 "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151", \
1065 "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159", \
1066 "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167", \
1067 "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175", \
1068 "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183", \
1069 "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191", \
1070 "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199", \
1071 "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207", \
1072 "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215", \
1073 "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223", \
1074 "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231", \
1075 "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239", \
1076 "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247", \
1077 "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255", \
1078 ":rD", ":rE", ":rH", ":rJ", ":rR", "ap_!BAD!"}
1080 #define ADDITIONAL_REGISTER_NAMES \
1081 {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257}, \
1082 {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}}
1084 #define PRINT_OPERAND(STREAM, X, CODE) \
1085 mmix_print_operand (STREAM, X, CODE)
1087 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
1088 mmix_print_operand_punct_valid_p (CODE)
1090 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
1091 mmix_print_operand_address (STREAM, X)
1094 #define USER_LABEL_PREFIX "_"
1097 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
1098 mmix_asm_output_reg_push (STREAM, REGNO)
1100 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
1101 mmix_asm_output_reg_pop (STREAM, REGNO)
1104 /* Node: Dispatch Tables */
1106 /* We define both types, since SImode is the better, but DImode the only
1107 possible for mmixal so that's the one actually used. */
1108 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
1109 mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL)
1111 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
1112 mmix_asm_output_addr_vec_elt (STREAM, VALUE)
1115 /* Node: Exception Region Output */
1118 /* Node: Alignment Output */
1120 #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
1121 mmix_asm_output_skip (STREAM, NBYTES)
1123 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
1124 mmix_asm_output_align (STREAM, POWER)
1127 /* Node: All Debuggers */
1129 #define DBX_REGISTER_NUMBER(REGNO) \
1130 mmix_dbx_register_number (REGNO)
1133 /* Node: DBX Options */
1135 /* Node: DBX Hooks */
1137 /* Node: File Names and DBX */
1141 /* Node: SDB and DWARF */
1142 #define DWARF2_DEBUGGING_INFO
1143 #define DWARF2_ASM_LINE_DEBUG_INFO 1
1145 /* Node: Cross-compilation */
1147 /* FIXME: I don't know whether it is best to tweak emit-rtl.c to handle
1148 the case where sizeof (float) == word_size / 2 on the target, or to fix
1149 real.h to define REAL_ARITHMETIC in that case. Anyway, it should be
1150 documented that a target can define this to force emulation. Note that
1151 we don't check #ifdef CROSS_COMPILE here; not even if mmix gets
1152 self-hosted must we do that. Case gcc.c-torture/compile/930611-1.c. */
1153 #define REAL_ARITHMETIC
1158 #define PREDICATE_CODES \
1159 {"mmix_reg_cc_operand", {SUBREG, REG}}, \
1160 {"mmix_foldable_comparison_operator", \
1161 {NE, EQ, GE, GT, LE, LT}}, \
1162 /* All '<', actually. */ \
1163 {"mmix_comparison_operator", \
1164 {NE, EQ, GE, GT, LE, LT, GEU, GTU, LEU, \
1165 LTU, UNORDERED, ORDERED, UNEQ, UNGE, UNLE, \
1167 {"mmix_symbolic_or_address_operand", \
1168 {SYMBOL_REF, LABEL_REF, CONST, \
1169 SUBREG, REG, PLUS}}, \
1170 {"mmix_reg_or_constant_operand", \
1171 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1172 {"mmix_reg_or_8bit_or_256_operand", \
1173 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1174 {"mmix_reg_or_8bit_operand", \
1175 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1176 {"mmix_reg_or_0_operand", \
1177 {CONST_INT, CONST_DOUBLE, SUBREG, REG}},
1179 #define SPECIAL_MODE_PREDICATES "mmix_symbolic_or_address_operand",
1181 /* There's no way to get a PC-relative offset into tables for SImode, so
1182 for the moment we have absolute entries in DImode.
1183 When we're going ELF, these should be SImode and 1. */
1184 #define CASE_VECTOR_MODE DImode
1185 #define CASE_VECTOR_PC_RELATIVE 0
1187 #define WORD_REGISTER_OPERATIONS
1189 /* We have a choice, which makes this yet another parameter to tweak. The
1190 gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent
1191 than "unsigned int", and we have signed characters. FIXME: measure. */
1192 #define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND)
1194 /* Whatever. I don't really know. This has worked before. It's also
1195 what everybody else is using. */
1196 #define EASY_DIV_EXPR TRUNC_DIV_EXPR
1200 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1202 /* We have a choice here too. */
1204 /* FIXME: Revisit, we don't have scc expanders yet. */
1205 #define STORE_FLAG_VALUE 1
1208 #define Pmode DImode
1210 #define FUNCTION_MODE QImode
1212 /* When in due time we *will* have some specific headers. */
1213 #define NO_IMPLICIT_EXTERN_C
1215 #define HANDLE_SYSV_PRAGMA
1217 /* These are checked. */
1218 #define DOLLARS_IN_IDENTIFIERS 0
1219 #define NO_DOLLAR_IN_LABEL
1220 #define NO_DOT_IN_LABEL
1222 #endif /* GCC_MMIX_H */
1225 * eval: (c-set-style "gnu")
1226 * indent-tabs-mode: t