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've 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. */
284 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
286 if (GET_MODE_CLASS (MODE) == MODE_INT \
287 && GET_MODE_SIZE (MODE) < 8) \
290 /* Do the following some time later, \
291 scrutinizing differences. */ \
292 if (0) (UNSIGNEDP) = 0; \
296 /* I'm a little bit undecided about this one. It might be beneficial to
297 promote all operations. */
298 #define PROMOTE_FOR_CALL_ONLY
300 /* We need to align everything to 64 bits that can affect the alignment
301 of other types. Since address N is interpreted in MMIX as (N modulo
302 access_size), we must align. */
303 #define PARM_BOUNDARY 64
304 #define STACK_BOUNDARY 64
305 #define FUNCTION_BOUNDARY 32
306 #define BIGGEST_ALIGNMENT 64
308 /* This one is only used in the ADA front end. */
309 #define MINIMUM_ATOMIC_ALIGNMENT 8
311 /* Copied from elfos.h. */
312 #define MAX_OFILE_ALIGNMENT (32768 * 8)
314 #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
315 mmix_data_alignment (TYPE, BASIC_ALIGN)
317 #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
318 mmix_constant_alignment (CONSTANT, BASIC_ALIGN)
320 #define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \
321 mmix_local_alignment (TYPE, BASIC_ALIGN)
323 /* Following other ports, this seems to most commonly be the word-size,
324 so let's do that here too. */
325 #define EMPTY_FIELD_BOUNDARY 64
327 /* We chose to have this low solely for similarity with the alpha. It has
328 nothing to do with passing the tests dg/c99-scope-2 and
329 execute/align-1.c. Nothing. Though the tests seem wrong. Padding of
330 the structure is automatically added to get alignment when needed if we
331 set this to just byte-boundary. */
332 #define STRUCTURE_SIZE_BOUNDARY 8
334 /* The lower bits are ignored. */
335 #define STRICT_ALIGNMENT 1
338 /* Node: Type Layout */
340 /* It might seem more natural to have 64-bit ints on a 64-bit machine,
341 but then an occasional MMIX programmer needs to know how to put a lot
342 of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather
343 than the "intuitive" char, short and int types. */
344 #define INT_TYPE_SIZE 32
345 #define SHORT_TYPE_SIZE 16
346 #define LONG_LONG_TYPE_SIZE 64
348 #define FLOAT_TYPE_SIZE 32
349 #define DOUBLE_TYPE_SIZE 64
350 #define LONG_DOUBLE_TYPE_SIZE 64
352 #define DEFAULT_SIGNED_CHAR 1
355 /* Node: Register Basics */
356 /* We tell GCC about all 256 general registers, and we also include
357 rD, rE, rH, rJ, rR and rO (in that order) so we can describe what insns
358 clobber them. We use a faked register for the argument pointer. It is
359 always eliminated towards the frame-pointer or the stack-pointer, never
360 output in assembly. Any fixed register would do for this, like $255,
361 but future debugging is easier when using a separate register. It
362 counts as a global register for pseudorandom reasons. */
363 #define FIRST_PSEUDO_REGISTER 263
365 /* We treat general registers with no assigned purpose as fixed. The
366 stack pointer, $254, is also fixed. Register $255 is referred to as a
367 temporary register in the MMIX papers, and used as such in mmixal, so
368 it should not be used as a stack pointer. We set it to fixed, and use
369 it "manually" at times of despair. */
370 #define FIXED_REGISTERS \
371 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
372 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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, 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, 0, 0, 0, 0, 0, 0, 0, 1, 1, \
387 1, 1, 0, 0, 0, 1, 1 \
390 /* General registers are fixed and therefore "historically" marked
391 call-used. (FIXME: This has changed). Registers $15..$31 are
392 call-clobbered; we'll put arguments in $16 and up, and we need $15 for
393 the MMIX register-stack "hole". */
394 #define CALL_USED_REGISTERS \
395 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 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, 0, 1, 1, \
411 1, 1, 1, 1, 1, 1, 1 \
414 #define CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage ()
416 /* No INCOMING_REGNO or OUTGOING_REGNO, since those macros are not usable
417 for MMIX: it doesn't have a fixed register window size. FIXME: Perhaps
418 we should say something about $0..$15 may sometimes be the incoming
419 $16..$31. Those macros need better documentation; it looks like
420 they're just bogus and that FUNCTION_INCOMING_ARG_REGNO_P and
421 FUNCTION_OUTGOING_VALUE should be used where they're used. For the
422 moment, do nothing; things seem to work anyway. */
424 /* Defining LOCAL_REGNO is necessary in presence of prologue/epilogue,
425 else GCC will be confused that those registers aren't saved and
427 #define LOCAL_REGNO(REGNO) mmix_local_regno (REGNO)
429 /* Node: Allocation Order */
431 /* We should allocate registers from 0 to 31 by increasing number, because
432 I think that's what people expect. Beyond that, just use
433 call-clobbered global registers first, then call-clobbered special
434 registers. Last, the fixed registers. */
435 #define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER \
436 { 0, 1, 2, 3, 4, 5, 6, 7, \
437 8, 9, 10, 11, 12, 13, 14, 15, \
438 16, 17, 18, 19, 20, 21, 22, 23, \
439 24, 25, 26, 27, 28, 29, 30, 31, \
441 252, 251, 250, 249, 248, 247, \
447 32, 33, 34, 35, 36, 37, 38, 39, \
448 40, 41, 42, 43, 44, 45, 46, 47, \
449 48, 49, 50, 51, 52, 53, 54, 55, \
450 56, 57, 58, 59, 60, 61, 62, 63, \
451 64, 65, 66, 67, 68, 69, 70, 71, \
452 72, 73, 74, 75, 76, 77, 78, 79, \
453 80, 81, 82, 83, 84, 85, 86, 87, \
454 88, 89, 90, 91, 92, 93, 94, 95, \
455 96, 97, 98, 99, 100, 101, 102, 103, \
456 104, 105, 106, 107, 108, 109, 110, 111, \
457 112, 113, 114, 115, 116, 117, 118, 119, \
458 120, 121, 122, 123, 124, 125, 126, 127, \
459 128, 129, 130, 131, 132, 133, 134, 135, \
460 136, 137, 138, 139, 140, 141, 142, 143, \
461 144, 145, 146, 147, 148, 149, 150, 151, \
462 152, 153, 154, 155, 156, 157, 158, 159, \
463 160, 161, 162, 163, 164, 165, 166, 167, \
464 168, 169, 170, 171, 172, 173, 174, 175, \
465 176, 177, 178, 179, 180, 181, 182, 183, \
466 184, 185, 186, 187, 188, 189, 190, 191, \
467 192, 193, 194, 195, 196, 197, 198, 199, \
468 200, 201, 202, 203, 204, 205, 206, 207, \
469 208, 209, 210, 211, 212, 213, 214, 215, \
470 216, 217, 218, 219, 220, 221, 222, 223, \
471 224, 225, 226, 227, 228, 229, 230, 231, \
472 232, 233, 234, 235, 236, 237, 238, 239, \
473 240, 241, 242, 243, 244, 245, 246, \
475 254, 255, 256, 257, 261, 262 \
478 /* As a convenience, we put this nearby, for ease of comparison.
479 First, call-clobbered registers in reverse order of assignment as
480 parameters (also the top ones; not because they're parameters, but
483 Second, saved registers that go on the register-stack.
485 Third, special registers rH, rR and rJ. They should not normally be
486 allocated, but since they're call-clobbered, it is cheaper to use one
487 of them than using a call-saved register for a call-clobbered use,
488 assuming it is referenced a very limited number of times. Other global
489 and fixed registers come next; they are never allocated. */
490 #define MMIX_GNU_ABI_REG_ALLOC_ORDER \
491 { 252, 251, 250, 249, 248, 247, 246, \
492 245, 244, 243, 242, 241, 240, 239, 238, \
493 237, 236, 235, 234, 233, 232, 231, \
495 0, 1, 2, 3, 4, 5, 6, 7, \
496 8, 9, 10, 11, 12, 13, 14, 15, \
497 16, 17, 18, 19, 20, 21, 22, 23, \
498 24, 25, 26, 27, 28, 29, 30, 31, \
504 32, 33, 34, 35, 36, 37, 38, 39, \
505 40, 41, 42, 43, 44, 45, 46, 47, \
506 48, 49, 50, 51, 52, 53, 54, 55, \
507 56, 57, 58, 59, 60, 61, 62, 63, \
508 64, 65, 66, 67, 68, 69, 70, 71, \
509 72, 73, 74, 75, 76, 77, 78, 79, \
510 80, 81, 82, 83, 84, 85, 86, 87, \
511 88, 89, 90, 91, 92, 93, 94, 95, \
512 96, 97, 98, 99, 100, 101, 102, 103, \
513 104, 105, 106, 107, 108, 109, 110, 111, \
514 112, 113, 114, 115, 116, 117, 118, 119, \
515 120, 121, 122, 123, 124, 125, 126, 127, \
516 128, 129, 130, 131, 132, 133, 134, 135, \
517 136, 137, 138, 139, 140, 141, 142, 143, \
518 144, 145, 146, 147, 148, 149, 150, 151, \
519 152, 153, 154, 155, 156, 157, 158, 159, \
520 160, 161, 162, 163, 164, 165, 166, 167, \
521 168, 169, 170, 171, 172, 173, 174, 175, \
522 176, 177, 178, 179, 180, 181, 182, 183, \
523 184, 185, 186, 187, 188, 189, 190, 191, \
524 192, 193, 194, 195, 196, 197, 198, 199, \
525 200, 201, 202, 203, 204, 205, 206, 207, \
526 208, 209, 210, 211, 212, 213, 214, 215, \
527 216, 217, 218, 219, 220, 221, 222, 223, \
528 224, 225, 226, 227, 228, 229, 230, \
530 254, 255, 256, 257, 261, 262 \
533 /* The default one. */
534 #define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER
536 /* Node: Values in Registers */
538 #define HARD_REGNO_NREGS(REGNO, MODE) \
539 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
542 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
544 /* Note that no register can really be accessed in single-float mode, so
545 we *can* say 1 here. FIXME: Will TRT happen for single-float, or do
546 we have to punt to libgcc1.asm? */
547 #define MODES_TIEABLE_P(MODE1, MODE2) 1
550 /* Node: Leaf Functions */
554 /* Node: Register Classes */
558 NO_REGS
, GENERAL_REGS
, REMAINDER_REG
, HIMULT_REG
,
559 SYSTEM_REGS
, ALL_REGS
, LIM_REG_CLASSES
562 #define N_REG_CLASSES (int) LIM_REG_CLASSES
564 #define REG_CLASS_NAMES \
565 {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG", \
566 "SYSTEM_REGS", "ALL_REGS"}
568 /* Note that the contents of each item is always 32 bits. */
569 #define REG_CLASS_CONTENTS \
570 {{0, 0, 0, 0, 0, 0, 0, 0, 0}, \
571 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20}, \
572 {0, 0, 0, 0, 0, 0, 0, 0, 0x10}, \
573 {0, 0, 0, 0, 0, 0, 0, 0, 4}, \
574 {0, 0, 0, 0, 0, 0, 0, 0, 0x7f}, \
575 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x7f}}
577 #define REGNO_REG_CLASS(REGNO) \
578 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
579 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
581 : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG \
582 : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS)
584 #define BASE_REG_CLASS GENERAL_REGS
586 #define INDEX_REG_CLASS GENERAL_REGS
588 #define REG_CLASS_FROM_LETTER(CHAR) \
589 ((CHAR) == 'x' ? SYSTEM_REGS \
590 : (CHAR) == 'y' ? REMAINDER_REG \
591 : (CHAR) == 'z' ? HIMULT_REG : NO_REGS)
593 #define REGNO_OK_FOR_BASE_P(REGNO) \
594 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
595 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
596 || (reg_renumber[REGNO] > 0 \
597 && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER))
599 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO)
601 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
602 mmix_preferred_reload_class (X, CLASS)
604 #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
605 mmix_preferred_output_reload_class (X, CLASS)
607 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
608 mmix_secondary_reload_class (CLASS, MODE, X, 1)
610 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
611 mmix_secondary_reload_class (CLASS, MODE, X, 0)
613 #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE)
615 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
616 mmix_const_ok_for_letter_p (VALUE, C)
618 #define EXTRA_CONSTRAINT(VALUE, C) \
619 mmix_extra_constraint (VALUE, C, MMIX_REG_OK_STRICT)
621 /* Do we need anything serious here? Yes, any FLOT constant. */
622 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
623 mmix_const_double_ok_for_letter_p (VALUE, C)
626 /* Node: Frame Layout */
628 #define STACK_GROWS_DOWNWARD
629 #define FRAME_GROWS_DOWNWARD
631 #define STARTING_FRAME_OFFSET \
632 mmix_starting_frame_offset ()
634 #define FIRST_PARM_OFFSET(FUNDECL) 0
636 #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \
637 mmix_dynamic_chain_address (FRAMEADDR)
639 /* FIXME: It seems RETURN_ADDR_OFFSET is undocumented. */
641 #define SETUP_FRAME_ADDRESSES() \
642 mmix_setup_frame_addresses ()
644 #define RETURN_ADDR_RTX(COUNT, FRAME) \
645 mmix_return_addr_rtx (COUNT, FRAME)
647 /* It's in rJ before we store it somewhere. */
648 #define INCOMING_RETURN_ADDR_RTX \
649 gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
651 /* FIXME: This does not seem properly documented or cross-indexed.
652 Nowhere except in the code does it say it *has* to be in the range
653 0..255, or else it will be truncated. That goes for the default too. */
654 #define DWARF_FRAME_RETURN_COLUMN \
655 DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
657 /* No return address is stored there. */
658 #define INCOMING_FRAME_SP_OFFSET 0
660 /* Node: Stack Checking */
664 /* Node: Exception Handling */
666 #define EH_RETURN_DATA_REGNO(N) \
667 mmix_eh_return_data_regno (N)
669 #define EH_RETURN_STACKADJ_RTX \
670 mmix_eh_return_stackadj_rtx ()
672 #define EH_RETURN_HANDLER_RTX \
673 mmix_eh_return_handler_rtx ()
675 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
676 mmix_asm_preferred_eh_data_format (CODE, GLOBAL)
678 /* Node: Frame Registers */
679 #define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM
681 /* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on
682 what register we want to use. */
683 #define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM
684 #define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM
686 #define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM
689 /* Node: Elimination */
690 /* FIXME: Is this requirement built-in? Anyway, we should try to get rid
691 of it; we can deduce the value. */
692 #define FRAME_POINTER_REQUIRED (nonlocal_goto_stack_level != NULL_RTX)
694 /* The frame-pointer is stored in a location that either counts to the
695 offset of incoming parameters, or that counts to the offset of the
696 frame, so we can't use a single offset. We therefore eliminate those
698 #define ELIMINABLE_REGS \
699 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
700 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
701 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
703 /* We need not worry about when the frame-pointer is required for other
704 reasons; GCC takes care of those cases. */
705 #define CAN_ELIMINATE(FROM, TO) 1
707 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
708 (OFFSET) = mmix_initial_elimination_offset (FROM, TO)
711 /* Node: Stack Arguments */
713 #define ACCUMULATE_OUTGOING_ARGS 1
715 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0
718 /* Node: Register Arguments */
719 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
720 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 0)
722 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
723 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 1)
725 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
726 mmix_function_arg_pass_by_reference (&(CUM), MODE, TYPE, NAMED)
728 /* This *sounds* good, but does not seem to be implemented correctly to
729 be a win; at least it wasn't in 2.7.2. FIXME: Check and perhaps
730 replace with a big comment.
731 The definition needs to match or be a subset of
732 FUNCTION_ARG_PASS_BY_REFERENCE, since not all callers check that before
733 usage. Watch lots of C++ testcases fail if set to 1, for example
734 g++.dg/init/byval1.C. */
735 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) \
736 mmix_function_arg_pass_by_reference (&(CUM), MODE, TYPE, NAMED)
738 typedef struct { int regs
; int lib
; } CUMULATIVE_ARGS
;
740 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
741 ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0))
743 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
745 = ((MUST_PASS_IN_STACK (MODE, TYPE)) \
746 || (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE) > 8 \
747 && !TARGET_LIBFUNC && !(CUM).lib)) \
748 ? (MMIX_MAX_ARGS_IN_REGS) + 1 \
749 : (CUM).regs + (7 + (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE))) / 8)
751 #define FUNCTION_ARG_REGNO_P(REGNO) \
752 mmix_function_arg_regno_p (REGNO, 0)
754 #define FUNCTION_INCOMING_ARG_REGNO_P(REGNO) \
755 mmix_function_arg_regno_p (REGNO, 1)
758 /* Node: Register Arguments */
760 #define FUNCTION_VALUE(VALTYPE, FUNC) \
761 gen_rtx_REG (TYPE_MODE (VALTYPE), MMIX_RETURN_VALUE_REGNUM)
763 /* This needs to take care of the register hole for complex return values. */
764 #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) \
765 mmix_function_outgoing_value (VALTYPE, FUNC)
767 #define LIBCALL_VALUE(MODE) \
768 gen_rtx_REG (MODE, MMIX_RETURN_VALUE_REGNUM)
770 #define FUNCTION_VALUE_REGNO_P(REGNO) \
771 mmix_function_value_regno_p (REGNO)
774 /* Node: Caller Saves */
778 /* Node: Function Entry */
780 /* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and
781 TARGET_ASM_FUNCTION_EPILOGUE. */
783 /* We need to say that the epilogue uses the return address, so the
784 initial-value machinery restores it. FIXME: Some targets
785 conditionalize on "reload_completed &&". Investigate difference.
786 FIXME: Not needed if nonlocal_goto_stack_level. */
787 #define EPILOGUE_USES(REGNO) \
788 ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
790 /* Node: Profiling */
791 #define FUNCTION_PROFILER(FILE, LABELNO) \
792 mmix_function_profiler (FILE, LABELNO)
796 /* FIXME: This and other EXPAND_BUILTIN_VA_... target macros are not
797 documented, although used by several targets. */
798 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
799 mmix_expand_builtin_va_arg (VALIST, TYPE)
801 /* Node: Trampolines */
803 #define TRAMPOLINE_TEMPLATE(FILE) \
804 mmix_trampoline_template (FILE)
806 #define TRAMPOLINE_SIZE mmix_trampoline_size
807 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
808 mmix_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
811 /* Node: Library Calls */
813 #define TARGET_MEM_FUNCTIONS
816 /* Node: Addressing Modes */
818 #define CONSTANT_ADDRESS_P(X) \
819 mmix_constant_address_p (X)
821 #define MAX_REGS_PER_ADDRESS 2
823 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
824 if (mmix_legitimate_address (MODE, X, MMIX_REG_OK_STRICT)) \
827 #ifndef REG_OK_STRICT
828 # define REG_OK_FOR_BASE_P(X) \
829 (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \
830 || REGNO (X) == MMIX_ARG_POINTER_REGNUM \
831 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
833 # define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
834 #endif /* REG_OK_STRICT */
836 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
838 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
840 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
842 #define LEGITIMATE_CONSTANT_P(X) \
843 mmix_legitimate_constant_p (X)
846 /* Node: Condition Code */
848 #define SELECT_CC_MODE(OP, X, Y) \
849 mmix_select_cc_mode (OP, X, Y)
851 /* A definition of CANONICALIZE_COMPARISON that changed LE and GT
852 comparisons with -1 to LT and GE respectively, and LT, LTU, GE or GEU
853 comparisons with 256 to 255 and LE, LEU, GT and GTU has been
854 ineffective; the code path for performing the changes did not trig for
855 neither the GCC testsuite nor ghostscript-6.52 nor Knuth's mmix.tar.gz
856 itself (core GCC functionality supposedly handling it) with sources
859 #define REVERSIBLE_CC_MODE(MODE) \
860 mmix_reversible_cc_mode (MODE)
865 /* The special registers can only move to and from general regs, and we
866 need to check that their constraints match, so say 3 for them. */
867 /* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2)
868 miscompiles reload1.c:reload_cse_simplify_set; a call to
869 reload_cse_regno_equal_p is missing when checking if a substitution of
870 a register setting is valid if this is defined to just the expression
871 in mmix_register_move_cost.
873 Symptom: a (all?) register setting is optimized away for e.g.
874 "char *p1(char *p) { return p+1; }" and the value of register zero ($0)
877 We can workaround by making this a function call - unknown if this
878 causes dire speed effects. */
879 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
880 mmix_register_move_cost (MODE, FROM, TO)
882 #define SLOW_BYTE_ACCESS 0
887 /* This must be a constant string, since it's used in crtstuff.c. */
888 #define TEXT_SECTION_ASM_OP \
889 "\t.text ! mmixal:= 9H LOC 8B"
891 /* FIXME: Not documented. */
892 #define DATA_SECTION_ASM_OP \
893 mmix_data_section_asm_op ()
895 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata"
901 /* Node: File Framework */
903 /* While any other punctuation character but ";" would do, we prefer "%"
904 or "!"; "!" is an unary operator and so will not be mistakenly included
905 in correctly formed expressions. The hash character adds mass; catches
906 the eye. We can't have it as a comment char by itself, since it's a
907 hex-number prefix. */
908 #define ASM_COMMENT_START "!#"
910 /* These aren't currently functional. We just keep them as markers. */
911 #define ASM_APP_ON "%APP\n"
912 #define ASM_APP_OFF "%NO_APP\n"
914 #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \
915 mmix_asm_output_source_filename (STREAM, NAME)
917 #define OUTPUT_QUOTED_STRING(STREAM, STRING) \
918 mmix_output_quoted_string (STREAM, STRING, strlen (STRING))
920 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) \
921 mmix_asm_output_source_line (STREAM, LINE)
923 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
926 /* Node: Data Output */
928 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \
929 mmix_asm_output_ascii (STREAM, PTR, LEN)
931 /* Node: Uninitialized Data */
933 #define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \
934 mmix_asm_output_aligned_common (ST, N, S, A)
936 #define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \
937 mmix_asm_output_aligned_local (ST, N, S, A)
940 /* Node: Label Output */
942 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
943 mmix_asm_output_label (STREAM, NAME)
945 #define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \
946 mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME)
948 #define GLOBAL_ASM_OP "\t.global "
950 #define ASM_WEAKEN_LABEL(STREAM, NAME) \
951 mmix_asm_weaken_label (STREAM, NAME)
953 #define MAKE_DECL_ONE_ONLY(DECL) \
954 mmix_make_decl_one_only (DECL)
956 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
957 mmix_asm_output_labelref (STREAM, NAME)
959 /* We insert a ":" to disambiguate against user symbols like L5. */
960 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
961 sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM))
963 /* Insert "::"; these are rarer than internal labels. FIXME: Make sure no
964 ":" is seen in the object file; we don't really want that mmixal
965 feature visible there. We don't want the default, which uses a dot;
966 that'd be incompatible with mmixal. */
967 #define ASM_PN_FORMAT "%s::%lu"
969 #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \
970 mmix_asm_output_def (STREAM, NAME, VALUE)
972 /* Node: Macros for Initialization */
973 /* We're compiling to ELF and linking to MMO; fundamental ELF features
974 that GCC depend on are there. */
976 /* These must be constant strings, since they're used in crtstuff.c. */
977 #define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible"
979 #define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible"
981 #define OBJECT_FORMAT_ELF
984 /* Node: Instruction Output */
986 /* The non-$ register names must be prefixed with ":", since they're
987 affected by PREFIX. We provide the non-colon names as additional
989 #define REGISTER_NAMES \
990 {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \
991 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \
992 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \
993 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31", \
994 "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39", \
995 "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47", \
996 "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55", \
997 "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63", \
998 "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71", \
999 "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79", \
1000 "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87", \
1001 "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95", \
1002 "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103", \
1003 "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111", \
1004 "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119", \
1005 "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127", \
1006 "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135", \
1007 "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143", \
1008 "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151", \
1009 "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159", \
1010 "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167", \
1011 "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175", \
1012 "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183", \
1013 "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191", \
1014 "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199", \
1015 "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207", \
1016 "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215", \
1017 "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223", \
1018 "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231", \
1019 "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239", \
1020 "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247", \
1021 "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255", \
1022 ":rD", ":rE", ":rH", ":rJ", ":rR", "ap_!BAD!", ":rO"}
1024 #define ADDITIONAL_REGISTER_NAMES \
1025 {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257}, \
1026 {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}, {"rO", MMIX_rO_REGNUM}}
1028 #define PRINT_OPERAND(STREAM, X, CODE) \
1029 mmix_print_operand (STREAM, X, CODE)
1031 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
1032 mmix_print_operand_punct_valid_p (CODE)
1034 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
1035 mmix_print_operand_address (STREAM, X)
1037 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
1038 mmix_asm_output_reg_push (STREAM, REGNO)
1040 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
1041 mmix_asm_output_reg_pop (STREAM, REGNO)
1044 /* Node: Dispatch Tables */
1046 /* We define both types, since SImode is the better, but DImode the only
1047 possible for mmixal so that's the one actually used. */
1048 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
1049 mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL)
1051 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
1052 mmix_asm_output_addr_vec_elt (STREAM, VALUE)
1055 /* Node: Exception Region Output */
1058 /* Node: Alignment Output */
1060 #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
1061 mmix_asm_output_skip (STREAM, NBYTES)
1063 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
1064 mmix_asm_output_align (STREAM, POWER)
1067 /* Node: All Debuggers */
1069 #define DBX_REGISTER_NUMBER(REGNO) \
1070 mmix_dbx_register_number (REGNO)
1073 /* Node: DBX Options */
1075 /* Node: DBX Hooks */
1077 /* Node: File Names and DBX */
1081 /* Node: SDB and DWARF */
1082 #define DWARF2_DEBUGGING_INFO 1
1083 #define DWARF2_ASM_LINE_DEBUG_INFO 1
1087 #define PREDICATE_CODES \
1088 {"mmix_reg_cc_operand", {SUBREG, REG}}, \
1089 {"mmix_foldable_comparison_operator", \
1090 {NE, EQ, GE, GT, LE, LT}}, \
1091 /* All '<', actually. */ \
1092 {"mmix_comparison_operator", \
1093 {NE, EQ, GE, GT, LE, LT, GEU, GTU, LEU, \
1094 LTU, UNORDERED, ORDERED, UNEQ, UNGE, UNLE, \
1096 {"mmix_symbolic_or_address_operand", \
1097 {SYMBOL_REF, LABEL_REF, CONST, \
1098 SUBREG, REG, PLUS}}, \
1099 {"mmix_reg_or_constant_operand", \
1100 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1101 {"mmix_reg_or_8bit_operand", \
1102 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1103 {"mmix_reg_or_0_operand", \
1104 {CONST_INT, CONST_DOUBLE, SUBREG, REG}},
1106 #define SPECIAL_MODE_PREDICATES "mmix_symbolic_or_address_operand",
1108 /* There's no way to get a PC-relative offset into tables for SImode, so
1109 for the moment we have absolute entries in DImode.
1110 When we're going ELF, these should be SImode and 1. */
1111 #define CASE_VECTOR_MODE DImode
1112 #define CASE_VECTOR_PC_RELATIVE 0
1114 #define WORD_REGISTER_OPERATIONS
1116 /* We have a choice, which makes this yet another parameter to tweak. The
1117 gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent
1118 than "unsigned int", and we have signed characters. FIXME: measure. */
1119 #define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND)
1123 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1125 /* ??? MMIX allows a choice of STORE_FLAG_VALUE. Revisit later,
1126 we don't have scc expanders yet. */
1128 #define Pmode DImode
1130 #define FUNCTION_MODE QImode
1132 #define NO_IMPLICIT_EXTERN_C
1134 #define HANDLE_SYSV_PRAGMA 1
1136 /* These are checked. */
1137 #define DOLLARS_IN_IDENTIFIERS 0
1138 #define NO_DOLLAR_IN_LABEL
1139 #define NO_DOT_IN_LABEL
1141 #endif /* GCC_MMIX_H */
1144 * eval: (c-set-style "gnu")
1145 * indent-tabs-mode: t