1 /* Definitions of target machine for GNU compiler, for MMIX.
2 Copyright (C) 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
3 Contributed by Hans-Peter Nilsson (hp@bitrange.com)
5 This file is part of GCC.
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)
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.
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. */
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 MMIX_rR_REGNUM
51 #define MMIX_ARG_POINTER_REGNUM 261
52 #define MMIX_rO_REGNUM 262
53 #define MMIX_LAST_STACK_REGISTER_REGNUM 31
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)
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
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
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
76 # define MMIX_REG_OK_STRICT 1
78 # define MMIX_REG_OK_STRICT 0
81 #define MMIX_FUNCTION_ARG_SIZE(MODE, TYPE) \
82 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) : int_size_in_bytes (TYPE))
84 /* Declarations for helper variables that are not tied to a particular
86 extern GTY(()) rtx mmix_compare_op0
;
87 extern GTY(()) rtx mmix_compare_op1
;
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
92 struct machine_function
GTY(())
95 int highest_saved_stack_register
;
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.
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. */
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"
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. */
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}"
127 /* Put unused option values here. */
128 extern const char *mmix_cc1_ignored_option
;
130 #define TARGET_OPTIONS \
131 {{"set-program-start=", &mmix_cc1_ignored_option, \
132 N_("Set start-address of the program"), 0}, \
133 {"set-data-start=", &mmix_cc1_ignored_option, \
134 N_("Set start-address of data"), 0} }
136 /* FIXME: There's no provision for profiling here. */
137 #define STARTFILE_SPEC \
138 "crti%O%s crtbegin%O%s"
140 #define ENDFILE_SPEC "crtend%O%s crtn%O%s"
142 /* Node: Run-time Target */
144 /* Define __LONG_MAX__, since we're advised not to change glimits.h. */
145 #define TARGET_CPU_CPP_BUILTINS() \
148 builtin_define ("__mmix__"); \
149 builtin_define ("__MMIX__"); \
150 if (TARGET_ABI_GNU) \
151 builtin_define ("__MMIX_ABI_GNU__"); \
153 builtin_define ("__MMIX_ABI_MMIXWARE__"); \
157 extern int target_flags
;
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
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 offsetting 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 have compiled with -mno-base-addresses. */
178 #define TARGET_MASK_BASE_ADDRESSES 128
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)
191 #define TARGET_DEFAULT \
192 (TARGET_MASK_BRANCH_PREDICT | TARGET_MASK_BASE_ADDRESSES \
193 | TARGET_MASK_USE_RETURN_INSN)
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")}, \
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, ""}}
234 /* Unfortunately, this must not reference anything in "mmix.c". */
235 #define TARGET_VERSION \
236 fprintf (stderr, " (MMIX)")
238 #define OVERRIDE_OPTIONS mmix_override_options ()
240 #define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \
244 flag_regmove = TRUE; \
246 if (SIZE || LEVEL > 1) \
248 flag_omit_frame_pointer = TRUE; \
249 flag_strength_reduce = FALSE; \
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 */
259 /* Node: Per-Function Data */
260 #define INIT_EXPANDERS mmix_init_expanders ()
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
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
281 /* FIXME: Promotion of modes currently generates slow code, extending
282 before every operation. */
283 /* I'm a little bit undecided about this one. It might be beneficial to
284 promote all operations. */
286 #define PROMOTE_FUNCTION_MODE(MODE, UNSIGNEDP, TYPE) \
288 if (GET_MODE_CLASS (MODE) == MODE_INT \
289 && GET_MODE_SIZE (MODE) < 8) \
292 /* Do the following some time later, \
293 scrutinizing differences. */ \
294 if (0) (UNSIGNEDP) = 0; \
298 /* We need to align everything to 64 bits that can affect the alignment
299 of other types. Since address N is interpreted in MMIX as (N modulo
300 access_size), we must align. */
301 #define PARM_BOUNDARY 64
302 #define STACK_BOUNDARY 64
303 #define FUNCTION_BOUNDARY 32
304 #define BIGGEST_ALIGNMENT 64
306 /* This one is only used in the ADA front end. */
307 #define MINIMUM_ATOMIC_ALIGNMENT 8
309 /* Copied from elfos.h. */
310 #define MAX_OFILE_ALIGNMENT (32768 * 8)
312 #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
313 mmix_data_alignment (TYPE, BASIC_ALIGN)
315 #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
316 mmix_constant_alignment (CONSTANT, BASIC_ALIGN)
318 #define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \
319 mmix_local_alignment (TYPE, BASIC_ALIGN)
321 /* Following other ports, this seems to most commonly be the word-size,
322 so let's do that here too. */
323 #define EMPTY_FIELD_BOUNDARY 64
325 /* We chose to have this low solely for similarity with the alpha. It has
326 nothing to do with passing the tests dg/c99-scope-2 and
327 execute/align-1.c. Nothing. Though the tests seem wrong. Padding of
328 the structure is automatically added to get alignment when needed if we
329 set this to just byte-boundary. */
330 #define STRUCTURE_SIZE_BOUNDARY 8
332 /* The lower bits are ignored. */
333 #define STRICT_ALIGNMENT 1
336 /* Node: Type Layout */
338 /* It might seem more natural to have 64-bit ints on a 64-bit machine,
339 but then an occasional MMIX programmer needs to know how to put a lot
340 of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather
341 than the "intuitive" char, short and int types. */
342 #define INT_TYPE_SIZE 32
343 #define SHORT_TYPE_SIZE 16
344 #define LONG_LONG_TYPE_SIZE 64
346 #define FLOAT_TYPE_SIZE 32
347 #define DOUBLE_TYPE_SIZE 64
348 #define LONG_DOUBLE_TYPE_SIZE 64
350 #define DEFAULT_SIGNED_CHAR 1
353 /* Node: Register Basics */
354 /* We tell GCC about all 256 general registers, and we also include
355 rD, rE, rH, rJ, rR and rO (in that order) so we can describe what insns
356 clobber them. We use a faked register for the argument pointer. It is
357 always eliminated towards the frame-pointer or the stack-pointer, never
358 output in assembly. Any fixed register would do for this, like $255,
359 but future debugging is easier when using a separate register. It
360 counts as a global register for pseudorandom reasons. */
361 #define FIRST_PSEUDO_REGISTER 263
363 /* We treat general registers with no assigned purpose as fixed. The
364 stack pointer, $254, is also fixed. Register $255 is referred to as a
365 temporary register in the MMIX papers, and used as such in mmixal, so
366 it should not be used as a stack pointer. We set it to fixed, and use
367 it "manually" at times of despair. */
368 #define FIXED_REGISTERS \
369 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
370 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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, \
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, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
376 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
377 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
378 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
379 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 0, 0, 0, 0, 0, 0, 0, 1, 1, \
385 1, 1, 0, 0, 0, 1, 1 \
388 /* General registers are fixed and therefore "historically" marked
389 call-used. (FIXME: This has changed). Registers $15..$31 are
390 call-clobbered; we'll put arguments in $16 and up, and we need $15 for
391 the MMIX register-stack "hole". */
392 #define CALL_USED_REGISTERS \
393 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 1, 1, 1, \
400 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
401 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
402 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
403 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 0, 1, 1, \
409 1, 1, 1, 1, 1, 1, 1 \
412 #define CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage ()
414 /* No INCOMING_REGNO or OUTGOING_REGNO, since those macros are not usable
415 for MMIX: it doesn't have a fixed register window size. FIXME: Perhaps
416 we should say something about $0..$15 may sometimes be the incoming
417 $16..$31. Those macros need better documentation; it looks like
418 they're just bogus and that FUNCTION_INCOMING_ARG_REGNO_P and
419 FUNCTION_OUTGOING_VALUE should be used where they're used. For the
420 moment, do nothing; things seem to work anyway. */
422 /* Defining LOCAL_REGNO is necessary in presence of prologue/epilogue,
423 else GCC will be confused that those registers aren't saved and
425 #define LOCAL_REGNO(REGNO) mmix_local_regno (REGNO)
427 /* Node: Allocation Order */
429 /* We should allocate registers from 0 to 31 by increasing number, because
430 I think that's what people expect. Beyond that, just use
431 call-clobbered global registers first, then call-clobbered special
432 registers. Last, the fixed registers. */
433 #define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER \
434 { 0, 1, 2, 3, 4, 5, 6, 7, \
435 8, 9, 10, 11, 12, 13, 14, 15, \
436 16, 17, 18, 19, 20, 21, 22, 23, \
437 24, 25, 26, 27, 28, 29, 30, 31, \
439 252, 251, 250, 249, 248, 247, \
445 32, 33, 34, 35, 36, 37, 38, 39, \
446 40, 41, 42, 43, 44, 45, 46, 47, \
447 48, 49, 50, 51, 52, 53, 54, 55, \
448 56, 57, 58, 59, 60, 61, 62, 63, \
449 64, 65, 66, 67, 68, 69, 70, 71, \
450 72, 73, 74, 75, 76, 77, 78, 79, \
451 80, 81, 82, 83, 84, 85, 86, 87, \
452 88, 89, 90, 91, 92, 93, 94, 95, \
453 96, 97, 98, 99, 100, 101, 102, 103, \
454 104, 105, 106, 107, 108, 109, 110, 111, \
455 112, 113, 114, 115, 116, 117, 118, 119, \
456 120, 121, 122, 123, 124, 125, 126, 127, \
457 128, 129, 130, 131, 132, 133, 134, 135, \
458 136, 137, 138, 139, 140, 141, 142, 143, \
459 144, 145, 146, 147, 148, 149, 150, 151, \
460 152, 153, 154, 155, 156, 157, 158, 159, \
461 160, 161, 162, 163, 164, 165, 166, 167, \
462 168, 169, 170, 171, 172, 173, 174, 175, \
463 176, 177, 178, 179, 180, 181, 182, 183, \
464 184, 185, 186, 187, 188, 189, 190, 191, \
465 192, 193, 194, 195, 196, 197, 198, 199, \
466 200, 201, 202, 203, 204, 205, 206, 207, \
467 208, 209, 210, 211, 212, 213, 214, 215, \
468 216, 217, 218, 219, 220, 221, 222, 223, \
469 224, 225, 226, 227, 228, 229, 230, 231, \
470 232, 233, 234, 235, 236, 237, 238, 239, \
471 240, 241, 242, 243, 244, 245, 246, \
473 254, 255, 256, 257, 261, 262 \
476 /* As a convenience, we put this nearby, for ease of comparison.
477 First, call-clobbered registers in reverse order of assignment as
478 parameters (also the top ones; not because they're parameters, but
481 Second, saved registers that go on the register-stack.
483 Third, special registers rH, rR and rJ. They should not normally be
484 allocated, but since they're call-clobbered, it is cheaper to use one
485 of them than using a call-saved register for a call-clobbered use,
486 assuming it is referenced a very limited number of times. Other global
487 and fixed registers come next; they are never allocated. */
488 #define MMIX_GNU_ABI_REG_ALLOC_ORDER \
489 { 252, 251, 250, 249, 248, 247, 246, \
490 245, 244, 243, 242, 241, 240, 239, 238, \
491 237, 236, 235, 234, 233, 232, 231, \
493 0, 1, 2, 3, 4, 5, 6, 7, \
494 8, 9, 10, 11, 12, 13, 14, 15, \
495 16, 17, 18, 19, 20, 21, 22, 23, \
496 24, 25, 26, 27, 28, 29, 30, 31, \
502 32, 33, 34, 35, 36, 37, 38, 39, \
503 40, 41, 42, 43, 44, 45, 46, 47, \
504 48, 49, 50, 51, 52, 53, 54, 55, \
505 56, 57, 58, 59, 60, 61, 62, 63, \
506 64, 65, 66, 67, 68, 69, 70, 71, \
507 72, 73, 74, 75, 76, 77, 78, 79, \
508 80, 81, 82, 83, 84, 85, 86, 87, \
509 88, 89, 90, 91, 92, 93, 94, 95, \
510 96, 97, 98, 99, 100, 101, 102, 103, \
511 104, 105, 106, 107, 108, 109, 110, 111, \
512 112, 113, 114, 115, 116, 117, 118, 119, \
513 120, 121, 122, 123, 124, 125, 126, 127, \
514 128, 129, 130, 131, 132, 133, 134, 135, \
515 136, 137, 138, 139, 140, 141, 142, 143, \
516 144, 145, 146, 147, 148, 149, 150, 151, \
517 152, 153, 154, 155, 156, 157, 158, 159, \
518 160, 161, 162, 163, 164, 165, 166, 167, \
519 168, 169, 170, 171, 172, 173, 174, 175, \
520 176, 177, 178, 179, 180, 181, 182, 183, \
521 184, 185, 186, 187, 188, 189, 190, 191, \
522 192, 193, 194, 195, 196, 197, 198, 199, \
523 200, 201, 202, 203, 204, 205, 206, 207, \
524 208, 209, 210, 211, 212, 213, 214, 215, \
525 216, 217, 218, 219, 220, 221, 222, 223, \
526 224, 225, 226, 227, 228, 229, 230, \
528 254, 255, 256, 257, 261, 262 \
531 /* The default one. */
532 #define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER
534 /* Node: Values in Registers */
536 #define HARD_REGNO_NREGS(REGNO, MODE) \
537 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
540 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
542 /* Note that no register can really be accessed in single-float mode, so
543 we *can* say 1 here. FIXME: Will TRT happen for single-float, or do
544 we have to punt to libgcc1.asm? */
545 #define MODES_TIEABLE_P(MODE1, MODE2) 1
548 /* Node: Leaf Functions */
552 /* Node: Register Classes */
556 NO_REGS
, GENERAL_REGS
, REMAINDER_REG
, HIMULT_REG
,
557 SYSTEM_REGS
, ALL_REGS
, LIM_REG_CLASSES
560 #define N_REG_CLASSES (int) LIM_REG_CLASSES
562 #define REG_CLASS_NAMES \
563 {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG", \
564 "SYSTEM_REGS", "ALL_REGS"}
566 /* Note that the contents of each item is always 32 bits. */
567 #define REG_CLASS_CONTENTS \
568 {{0, 0, 0, 0, 0, 0, 0, 0, 0}, \
569 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20}, \
570 {0, 0, 0, 0, 0, 0, 0, 0, 0x10}, \
571 {0, 0, 0, 0, 0, 0, 0, 0, 4}, \
572 {0, 0, 0, 0, 0, 0, 0, 0, 0x7f}, \
573 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x7f}}
575 #define REGNO_REG_CLASS(REGNO) \
576 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
577 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
579 : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG \
580 : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS)
582 #define BASE_REG_CLASS GENERAL_REGS
584 #define INDEX_REG_CLASS GENERAL_REGS
586 #define REG_CLASS_FROM_LETTER(CHAR) \
587 ((CHAR) == 'x' ? SYSTEM_REGS \
588 : (CHAR) == 'y' ? REMAINDER_REG \
589 : (CHAR) == 'z' ? HIMULT_REG : NO_REGS)
591 #define REGNO_OK_FOR_BASE_P(REGNO) \
592 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
593 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
594 || (reg_renumber[REGNO] > 0 \
595 && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER))
597 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO)
599 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
600 mmix_preferred_reload_class (X, CLASS)
602 #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
603 mmix_preferred_output_reload_class (X, CLASS)
605 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
606 mmix_secondary_reload_class (CLASS, MODE, X, 1)
608 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
609 mmix_secondary_reload_class (CLASS, MODE, X, 0)
611 #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE)
613 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
614 mmix_const_ok_for_letter_p (VALUE, C)
616 #define EXTRA_CONSTRAINT(VALUE, C) \
617 mmix_extra_constraint (VALUE, C, MMIX_REG_OK_STRICT)
619 /* Do we need anything serious here? Yes, any FLOT constant. */
620 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
621 mmix_const_double_ok_for_letter_p (VALUE, C)
624 /* Node: Frame Layout */
626 #define STACK_GROWS_DOWNWARD
627 #define FRAME_GROWS_DOWNWARD
629 #define STARTING_FRAME_OFFSET \
630 mmix_starting_frame_offset ()
632 #define FIRST_PARM_OFFSET(FUNDECL) 0
634 #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \
635 mmix_dynamic_chain_address (FRAMEADDR)
637 /* FIXME: It seems RETURN_ADDR_OFFSET is undocumented. */
639 #define SETUP_FRAME_ADDRESSES() \
640 mmix_setup_frame_addresses ()
642 #define RETURN_ADDR_RTX(COUNT, FRAME) \
643 mmix_return_addr_rtx (COUNT, FRAME)
645 /* It's in rJ before we store it somewhere. */
646 #define INCOMING_RETURN_ADDR_RTX \
647 gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
649 /* FIXME: This does not seem properly documented or cross-indexed.
650 Nowhere except in the code does it say it *has* to be in the range
651 0..255, or else it will be truncated. That goes for the default too. */
652 #define DWARF_FRAME_RETURN_COLUMN \
653 DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
655 /* No return address is stored there. */
656 #define INCOMING_FRAME_SP_OFFSET 0
658 /* Node: Stack Checking */
662 /* Node: Exception Handling */
664 #define EH_RETURN_DATA_REGNO(N) \
665 mmix_eh_return_data_regno (N)
667 #define EH_RETURN_STACKADJ_RTX \
668 mmix_eh_return_stackadj_rtx ()
670 #define EH_RETURN_HANDLER_RTX \
671 mmix_eh_return_handler_rtx ()
673 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
674 mmix_asm_preferred_eh_data_format (CODE, GLOBAL)
676 /* Node: Frame Registers */
677 #define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM
679 /* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on
680 what register we want to use. */
681 #define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM
682 #define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM
684 #define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM
687 /* Node: Elimination */
688 /* FIXME: Is this requirement built-in? Anyway, we should try to get rid
689 of it; we can deduce the value. */
690 #define FRAME_POINTER_REQUIRED current_function_has_nonlocal_label
692 /* The frame-pointer is stored in a location that either counts to the
693 offset of incoming parameters, or that counts to the offset of the
694 frame, so we can't use a single offset. We therefore eliminate those
696 #define ELIMINABLE_REGS \
697 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
698 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
699 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
701 /* We need not worry about when the frame-pointer is required for other
702 reasons; GCC takes care of those cases. */
703 #define CAN_ELIMINATE(FROM, TO) 1
705 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
706 (OFFSET) = mmix_initial_elimination_offset (FROM, TO)
709 /* Node: Stack Arguments */
711 #define ACCUMULATE_OUTGOING_ARGS 1
713 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0
716 /* Node: Register Arguments */
717 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
718 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 0)
720 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
721 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 1)
723 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
724 mmix_function_arg_pass_by_reference (&(CUM), MODE, TYPE, NAMED)
726 /* This *sounds* good, but does not seem to be implemented correctly to
727 be a win; at least it wasn't in 2.7.2. FIXME: Check and perhaps
728 replace with a big comment.
729 The definition needs to match or be a subset of
730 FUNCTION_ARG_PASS_BY_REFERENCE, since not all callers check that before
731 usage. Watch lots of C++ testcases fail if set to 1, for example
732 g++.dg/init/byval1.C. */
733 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) \
734 mmix_function_arg_pass_by_reference (&(CUM), MODE, TYPE, NAMED)
736 typedef struct { int regs
; int lib
; } CUMULATIVE_ARGS
;
738 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
739 ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0))
741 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
743 = ((targetm.calls.must_pass_in_stack (MODE, TYPE)) \
744 || (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE) > 8 \
745 && !TARGET_LIBFUNC && !(CUM).lib)) \
746 ? (MMIX_MAX_ARGS_IN_REGS) + 1 \
747 : (CUM).regs + (7 + (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE))) / 8)
749 #define FUNCTION_ARG_REGNO_P(REGNO) \
750 mmix_function_arg_regno_p (REGNO, 0)
752 #define FUNCTION_INCOMING_ARG_REGNO_P(REGNO) \
753 mmix_function_arg_regno_p (REGNO, 1)
756 /* Node: Register Arguments */
758 #define FUNCTION_VALUE(VALTYPE, FUNC) \
759 gen_rtx_REG (TYPE_MODE (VALTYPE), MMIX_RETURN_VALUE_REGNUM)
761 /* This needs to take care of the register hole for complex return values. */
762 #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) \
763 mmix_function_outgoing_value (VALTYPE, FUNC)
765 #define LIBCALL_VALUE(MODE) \
766 gen_rtx_REG (MODE, MMIX_RETURN_VALUE_REGNUM)
768 #define FUNCTION_VALUE_REGNO_P(REGNO) \
769 mmix_function_value_regno_p (REGNO)
772 /* Node: Caller Saves */
776 /* Node: Function Entry */
778 /* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and
779 TARGET_ASM_FUNCTION_EPILOGUE. */
781 /* We need to say that the epilogue uses the return address, so the
782 initial-value machinery restores it. FIXME: Some targets
783 conditionalize on "reload_completed &&". Investigate difference.
784 FIXME: Not needed if nonlocal_goto_stack_level. */
785 #define EPILOGUE_USES(REGNO) \
786 ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
788 /* Node: Profiling */
789 #define FUNCTION_PROFILER(FILE, LABELNO) \
790 mmix_function_profiler (FILE, LABELNO)
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: Addressing Modes */
804 #define CONSTANT_ADDRESS_P(X) \
805 mmix_constant_address_p (X)
807 #define MAX_REGS_PER_ADDRESS 2
809 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
810 if (mmix_legitimate_address (MODE, X, MMIX_REG_OK_STRICT)) \
813 #ifndef REG_OK_STRICT
814 # define REG_OK_FOR_BASE_P(X) \
815 (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \
816 || REGNO (X) == MMIX_ARG_POINTER_REGNUM \
817 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
819 # define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
820 #endif /* REG_OK_STRICT */
822 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
824 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
826 #define LEGITIMATE_CONSTANT_P(X) \
827 mmix_legitimate_constant_p (X)
830 /* Node: Condition Code */
832 #define SELECT_CC_MODE(OP, X, Y) \
833 mmix_select_cc_mode (OP, X, Y)
835 /* A definition of CANONICALIZE_COMPARISON that changed LE and GT
836 comparisons with -1 to LT and GE respectively, and LT, LTU, GE or GEU
837 comparisons with 256 to 255 and LE, LEU, GT and GTU has been
838 ineffective; the code path for performing the changes did not trig for
839 neither the GCC testsuite nor ghostscript-6.52 nor Knuth's mmix.tar.gz
840 itself (core GCC functionality supposedly handling it) with sources
843 #define REVERSIBLE_CC_MODE(MODE) \
844 mmix_reversible_cc_mode (MODE)
849 /* The special registers can only move to and from general regs, and we
850 need to check that their constraints match, so say 3 for them. */
851 /* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2)
852 miscompiles reload1.c:reload_cse_simplify_set; a call to
853 reload_cse_regno_equal_p is missing when checking if a substitution of
854 a register setting is valid if this is defined to just the expression
855 in mmix_register_move_cost.
857 Symptom: a (all?) register setting is optimized away for e.g.
858 "char *p1(char *p) { return p+1; }" and the value of register zero ($0)
861 We can workaround by making this a function call - unknown if this
862 causes dire speed effects. */
863 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
864 mmix_register_move_cost (MODE, FROM, TO)
866 #define SLOW_BYTE_ACCESS 0
871 /* This must be a constant string, since it's used in crtstuff.c. */
872 #define TEXT_SECTION_ASM_OP \
873 "\t.text ! mmixal:= 9H LOC 8B"
875 /* FIXME: Not documented. */
876 #define DATA_SECTION_ASM_OP \
877 mmix_data_section_asm_op ()
879 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata"
885 /* Node: File Framework */
887 /* While any other punctuation character but ";" would do, we prefer "%"
888 or "!"; "!" is an unary operator and so will not be mistakenly included
889 in correctly formed expressions. The hash character adds mass; catches
890 the eye. We can't have it as a comment char by itself, since it's a
891 hex-number prefix. */
892 #define ASM_COMMENT_START "!#"
894 /* These aren't currently functional. We just keep them as markers. */
895 #define ASM_APP_ON "%APP\n"
896 #define ASM_APP_OFF "%NO_APP\n"
898 #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \
899 mmix_asm_output_source_filename (STREAM, NAME)
901 #define OUTPUT_QUOTED_STRING(STREAM, STRING) \
902 mmix_output_quoted_string (STREAM, STRING, strlen (STRING))
904 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) \
905 mmix_asm_output_source_line (STREAM, LINE)
907 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
910 /* Node: Data Output */
912 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \
913 mmix_asm_output_ascii (STREAM, PTR, LEN)
915 /* Node: Uninitialized Data */
917 #define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \
918 mmix_asm_output_aligned_common (ST, N, S, A)
920 #define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \
921 mmix_asm_output_aligned_local (ST, N, S, A)
924 /* Node: Label Output */
926 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
927 mmix_asm_output_label (STREAM, NAME)
929 #define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \
930 mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME)
932 #define GLOBAL_ASM_OP "\t.global "
934 #define ASM_WEAKEN_LABEL(STREAM, NAME) \
935 mmix_asm_weaken_label (STREAM, NAME)
937 #define MAKE_DECL_ONE_ONLY(DECL) \
938 mmix_make_decl_one_only (DECL)
940 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
941 mmix_asm_output_labelref (STREAM, NAME)
943 /* We insert a ":" to disambiguate against user symbols like L5. */
944 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
945 sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM))
947 /* Insert "::"; these are rarer than internal labels. FIXME: Make sure no
948 ":" is seen in the object file; we don't really want that mmixal
949 feature visible there. We don't want the default, which uses a dot;
950 that'd be incompatible with mmixal. */
951 #define ASM_PN_FORMAT "%s::%lu"
953 #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \
954 mmix_asm_output_def (STREAM, NAME, VALUE)
956 /* Node: Macros for Initialization */
957 /* We're compiling to ELF and linking to MMO; fundamental ELF features
958 that GCC depend on are there. */
960 /* These must be constant strings, since they're used in crtstuff.c. */
961 #define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible"
963 #define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible"
965 #define OBJECT_FORMAT_ELF
968 /* Node: Instruction Output */
970 /* The non-$ register names must be prefixed with ":", since they're
971 affected by PREFIX. We provide the non-colon names as additional
973 #define REGISTER_NAMES \
974 {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \
975 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \
976 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \
977 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31", \
978 "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39", \
979 "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47", \
980 "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55", \
981 "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63", \
982 "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71", \
983 "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79", \
984 "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87", \
985 "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95", \
986 "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103", \
987 "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111", \
988 "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119", \
989 "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127", \
990 "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135", \
991 "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143", \
992 "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151", \
993 "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159", \
994 "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167", \
995 "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175", \
996 "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183", \
997 "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191", \
998 "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199", \
999 "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207", \
1000 "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215", \
1001 "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223", \
1002 "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231", \
1003 "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239", \
1004 "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247", \
1005 "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255", \
1006 ":rD", ":rE", ":rH", ":rJ", ":rR", "ap_!BAD!", ":rO"}
1008 #define ADDITIONAL_REGISTER_NAMES \
1009 {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257}, \
1010 {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}, {"rO", MMIX_rO_REGNUM}}
1012 #define PRINT_OPERAND(STREAM, X, CODE) \
1013 mmix_print_operand (STREAM, X, CODE)
1015 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
1016 mmix_print_operand_punct_valid_p (CODE)
1018 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
1019 mmix_print_operand_address (STREAM, X)
1021 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
1022 mmix_asm_output_reg_push (STREAM, REGNO)
1024 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
1025 mmix_asm_output_reg_pop (STREAM, REGNO)
1028 /* Node: Dispatch Tables */
1030 /* We define both types, since SImode is the better, but DImode the only
1031 possible for mmixal so that's the one actually used. */
1032 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
1033 mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL)
1035 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
1036 mmix_asm_output_addr_vec_elt (STREAM, VALUE)
1039 /* Node: Exception Region Output */
1042 /* Node: Alignment Output */
1044 #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
1045 mmix_asm_output_skip (STREAM, NBYTES)
1047 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
1048 mmix_asm_output_align (STREAM, POWER)
1051 /* Node: All Debuggers */
1053 #define DBX_REGISTER_NUMBER(REGNO) \
1054 mmix_dbx_register_number (REGNO)
1057 /* Node: DBX Options */
1059 /* Node: DBX Hooks */
1061 /* Node: File Names and DBX */
1065 /* Node: SDB and DWARF */
1066 #define DWARF2_DEBUGGING_INFO 1
1067 #define DWARF2_ASM_LINE_DEBUG_INFO 1
1071 #define PREDICATE_CODES \
1072 {"mmix_reg_cc_operand", {SUBREG, REG}}, \
1073 {"mmix_foldable_comparison_operator", \
1074 {NE, EQ, GE, GT, LE, LT}}, \
1075 /* All '<', actually. */ \
1076 {"mmix_comparison_operator", \
1077 {NE, EQ, GE, GT, LE, LT, GEU, GTU, LEU, \
1078 LTU, UNORDERED, ORDERED, UNEQ, UNGE, UNLE, \
1080 {"mmix_symbolic_or_address_operand", \
1081 {SYMBOL_REF, LABEL_REF, CONST, \
1082 SUBREG, REG, PLUS}}, \
1083 {"mmix_reg_or_constant_operand", \
1084 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1085 {"mmix_reg_or_8bit_operand", \
1086 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1087 {"mmix_reg_or_0_operand", \
1088 {CONST_INT, CONST_DOUBLE, SUBREG, REG}},
1090 #define SPECIAL_MODE_PREDICATES "mmix_symbolic_or_address_operand",
1092 /* There's no way to get a PC-relative offset into tables for SImode, so
1093 for the moment we have absolute entries in DImode.
1094 When we're going ELF, these should be SImode and 1. */
1095 #define CASE_VECTOR_MODE DImode
1096 #define CASE_VECTOR_PC_RELATIVE 0
1098 #define WORD_REGISTER_OPERATIONS
1100 /* We have a choice, which makes this yet another parameter to tweak. The
1101 gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent
1102 than "unsigned int", and we have signed characters. FIXME: measure. */
1103 #define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND)
1107 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1109 /* ??? MMIX allows a choice of STORE_FLAG_VALUE. Revisit later,
1110 we don't have scc expanders yet. */
1112 #define Pmode DImode
1114 #define FUNCTION_MODE QImode
1116 #define NO_IMPLICIT_EXTERN_C
1118 #define HANDLE_SYSV_PRAGMA 1
1120 /* These are checked. */
1121 #define DOLLARS_IN_IDENTIFIERS 0
1122 #define NO_DOLLAR_IN_LABEL
1123 #define NO_DOT_IN_LABEL
1125 #endif /* GCC_MMIX_H */
1128 * eval: (c-set-style "gnu")
1129 * indent-tabs-mode: t