1 /* Definitions of target machine for GNU compiler, for MMIX.
2 Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
3 Contributed by Hans-Peter Nilsson (hp@bitrange.com)
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 260
51 #define MMIX_ARG_POINTER_REGNUM 261
52 #define MMIX_LAST_STACK_REGISTER_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 GTY(()) rtx mmix_compare_op0
;
86 extern GTY(()) rtx 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
GTY(())
94 int highest_saved_stack_register
;
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 /* User symbols are in the same name-space as built-in symbols, but we
109 don't need the built-in symbols, so remove those and instead apply
110 stricter operand checking. Don't warn when expanding insns. */
111 #define ASM_SPEC "-no-predefined-syms -x"
113 /* Pass on -mset-program-start=N and -mset-data-start=M to the linker.
114 Provide default program start 0x100 unless -mno-set-program-start.
115 Don't do this if linking relocatably, with -r. For a final link,
116 produce mmo, unless ELF is requested or when linking relocatably. */
118 "%{mset-program-start=*:--defsym __.MMIX.start..text=%*}\
119 %{mset-data-start=*:--defsym __.MMIX.start..data=%*}\
120 %{!mset-program-start=*:\
121 %{!mno-set-program-start:\
122 %{!r:--defsym __.MMIX.start..text=0x100}}}\
123 %{!melf:%{!r:-m mmo}}%{melf|r:-m elf64mmix}"
125 /* Put unused option values here. */
126 extern const char *mmix_cc1_ignored_option
;
128 #define TARGET_OPTIONS \
129 {{"set-program-start=", &mmix_cc1_ignored_option, \
130 N_("Set start-address of the program") }, \
131 {"set-data-start=", &mmix_cc1_ignored_option, \
132 N_("Set start-address of data")}}
134 /* FIXME: There's no provision for profiling here. */
135 #define STARTFILE_SPEC \
136 "crti%O%s crtbegin%O%s"
138 #define ENDFILE_SPEC "crtend%O%s crtn%O%s"
140 /* Node: Run-time Target */
142 /* Define __LONG_MAX__, since we're advised not to change glimits.h. */
143 #define TARGET_CPU_CPP_BUILTINS() \
146 builtin_define ("__mmix__"); \
147 builtin_define ("__MMIX__"); \
148 if (TARGET_ABI_GNU) \
149 builtin_define ("__MMIX_ABI_GNU__"); \
151 builtin_define ("__MMIX_ABI_MMIXWARE__"); \
155 extern int target_flags
;
157 #define TARGET_MASK_LIBFUNCS 1
158 #define TARGET_MASK_ABI_GNU 2
159 #define TARGET_MASK_FCMP_EPSILON 4
160 #define TARGET_MASK_ZERO_EXTEND 8
161 #define TARGET_MASK_KNUTH_DIVISION 16
162 #define TARGET_MASK_TOPLEVEL_SYMBOLS 32
163 #define TARGET_MASK_BRANCH_PREDICT 64
164 #define TARGET_MASK_USE_RETURN_INSN 128
166 /* We use the term "base address" since that's what Knuth uses. The base
167 address goes in a global register. When addressing, it's more like
168 "base address plus offset", with the offset being 0..255 from the base,
169 which itself can be a symbol plus an offset. The effect is like having
170 a constant pool in global registers, code offseting from those
171 registers (automatically causing a request for a suitable constant base
172 address register) without having to know the specific register or the
173 specific offset. The setback is that there's a limited number of
174 registers, and you'll not find out until link time whether you
175 should've compiled with -mno-base-addresses. */
176 #define TARGET_MASK_BASE_ADDRESSES 128
178 /* FIXME: Get rid of this one. */
179 #define TARGET_LIBFUNC (target_flags & TARGET_MASK_LIBFUNCS)
180 #define TARGET_ABI_GNU (target_flags & TARGET_MASK_ABI_GNU)
181 #define TARGET_FCMP_EPSILON (target_flags & TARGET_MASK_FCMP_EPSILON)
182 #define TARGET_ZERO_EXTEND (target_flags & TARGET_MASK_ZERO_EXTEND)
183 #define TARGET_KNUTH_DIVISION (target_flags & TARGET_MASK_KNUTH_DIVISION)
184 #define TARGET_TOPLEVEL_SYMBOLS (target_flags & TARGET_MASK_TOPLEVEL_SYMBOLS)
185 #define TARGET_BRANCH_PREDICT (target_flags & TARGET_MASK_BRANCH_PREDICT)
186 #define TARGET_BASE_ADDRESSES (target_flags & TARGET_MASK_BASE_ADDRESSES)
187 #define TARGET_USE_RETURN_INSN (target_flags & TARGET_MASK_USE_RETURN_INSN)
189 #define TARGET_DEFAULT \
190 (TARGET_MASK_BRANCH_PREDICT | TARGET_MASK_BASE_ADDRESSES \
191 | TARGET_MASK_USE_RETURN_INSN)
193 /* FIXME: Provide a way to *load* the epsilon register. */
194 #define TARGET_SWITCHES \
195 {{"libfuncs", TARGET_MASK_LIBFUNCS, \
196 N_("For intrinsics library: pass all parameters in registers")}, \
197 {"no-libfuncs", -TARGET_MASK_LIBFUNCS, ""}, \
198 {"abi=mmixware", -TARGET_MASK_ABI_GNU, \
199 N_("Use register stack for parameters and return value")}, \
200 {"abi=gnu", TARGET_MASK_ABI_GNU, \
201 N_("Use call-clobbered registers for parameters and return value")}, \
202 {"epsilon", TARGET_MASK_FCMP_EPSILON, \
203 N_("Use epsilon-respecting floating point compare instructions")}, \
204 {"no-epsilon", -TARGET_MASK_FCMP_EPSILON, ""}, \
205 {"zero-extend", TARGET_MASK_ZERO_EXTEND, \
206 N_("Use zero-extending memory loads, not sign-extending ones")}, \
207 {"no-zero-extend", -TARGET_MASK_ZERO_EXTEND, ""}, \
208 {"knuthdiv", TARGET_MASK_KNUTH_DIVISION, \
209 N_("Generate divide results with reminder having the same sign as the\
210 divisor (not the dividend)")}, \
211 {"no-knuthdiv", -TARGET_MASK_KNUTH_DIVISION, ""}, \
212 {"toplevel-symbols", TARGET_MASK_TOPLEVEL_SYMBOLS, \
213 N_("Prepend global symbols with \":\" (for use with PREFIX)")}, \
214 {"no-toplevel-symbols", -TARGET_MASK_TOPLEVEL_SYMBOLS, \
215 N_("Do not provide a default start-address 0x100 of the program")}, \
217 N_("Link to emit program in ELF format (rather than mmo)")}, \
218 {"branch-predict", TARGET_MASK_BRANCH_PREDICT, \
219 N_("Use P-mnemonics for branches statically predicted as taken")}, \
220 {"no-branch-predict", -TARGET_MASK_BRANCH_PREDICT, \
221 N_("Don't use P-mnemonics for branches")}, \
222 {"base-addresses", TARGET_MASK_BASE_ADDRESSES, \
223 N_("Use addresses that allocate global registers")}, \
224 {"no-base-addresses", -TARGET_MASK_BASE_ADDRESSES, \
225 N_("Do not use addresses that allocate global registers")}, \
226 {"single-exit", -TARGET_MASK_USE_RETURN_INSN, \
227 N_("Generate a single exit point for each function")}, \
228 {"no-single-exit", TARGET_MASK_USE_RETURN_INSN, \
229 N_("Do not generate a single exit point for each function")}, \
230 {"", TARGET_DEFAULT, ""}}
232 /* Unfortunately, this must not reference anything in "mmix.c". */
233 #define TARGET_VERSION \
234 fprintf (stderr, " (MMIX)")
236 #define OVERRIDE_OPTIONS mmix_override_options ()
238 #define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \
242 flag_regmove = TRUE; \
244 if (SIZE || LEVEL > 1) \
246 flag_omit_frame_pointer = TRUE; \
247 flag_strength_reduce = FALSE; \
252 /* This one will have to wait a little bit; right now we can't debug
253 neither with or without a frame-pointer. */
254 /* #define CAN_DEBUG_WITHOUT_FP */
257 /* Node: Per-Function Data */
258 #define INIT_EXPANDERS mmix_init_expanders ()
261 /* Node: Storage Layout */
262 /* I see no bitfield instructions. Anyway, the common order is from low
263 to high, as the power of two, hence little-endian. */
264 #define BITS_BIG_ENDIAN 0
265 #define BYTES_BIG_ENDIAN 1
266 #define WORDS_BIG_ENDIAN 1
267 #define FLOAT_WORDS_BIG_ENDIAN 1
268 #define UNITS_PER_WORD 8
270 /* FIXME: This macro is correlated to MAX_FIXED_MODE_SIZE in that
271 e.g. this macro must not be 8 (default, UNITS_PER_WORD) when
272 MAX_FIXED_MODE_SIZE is 64 (default, DImode), or really: this must be
273 set manually if MAX_FIXED_MODE_SIZE is not at least twice the register
274 size. By setting it to 4, we don't have to worry about TImode things
275 yet. Revisit, perhaps get TImode going or get some solution that does
276 not mandate TImode or lie in other ways. */
277 #define MIN_UNITS_PER_WORD 4
279 /* FIXME: Promotion of modes currently generates slow code, extending
280 before every operation. */
282 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
284 if (GET_MODE_CLASS (MODE) == MODE_INT \
285 && GET_MODE_SIZE (MODE) < 8) \
288 /* Do the following some time later, \
289 scrutinizing differences. */ \
290 if (0) (UNSIGNEDP) = 0; \
294 #define PROMOTE_FUNCTION_ARGS
297 /* Apparently not doing TRT if int < register-size. FIXME: Perhaps
298 FUNCTION_VALUE and LIBCALL_VALUE needs tweaking as some ports say. */
299 #define PROMOTE_FUNCTION_RETURN
302 /* I'm a little bit undecided about this one. It might be beneficial to
303 promote all operations. */
304 #define PROMOTE_FOR_CALL_ONLY
306 /* We need to align everything to 64 bits that can affect the alignment
307 of other types. Since address N is interpreted in MMIX as (N modulo
308 access_size), we must align. */
309 #define PARM_BOUNDARY 64
310 #define STACK_BOUNDARY 64
311 #define FUNCTION_BOUNDARY 32
312 #define BIGGEST_ALIGNMENT 64
314 /* This one is only used in the ADA front end. */
315 #define MINIMUM_ATOMIC_ALIGNMENT 8
317 /* Copied from elfos.h. */
318 #define MAX_OFILE_ALIGNMENT (32768 * 8)
320 #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
321 mmix_data_alignment (TYPE, BASIC_ALIGN)
323 #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
324 mmix_constant_alignment (CONSTANT, BASIC_ALIGN)
326 #define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \
327 mmix_local_alignment (TYPE, BASIC_ALIGN)
329 /* Following other ports, this seems to most commonly be the word-size,
330 so let's do that here too. */
331 #define EMPTY_FIELD_BOUNDARY 64
333 /* We chose to have this low solely for similarity with the alpha. It has
334 nothing to do with passing the tests dg/c99-scope-2 and
335 execute/align-1.c. Nothing. Though the tests seem wrong. Padding of
336 the structure is automatically added to get alignment when needed if we
337 set this to just byte-boundary. */
338 #define STRUCTURE_SIZE_BOUNDARY 8
340 /* The lower bits are ignored. */
341 #define STRICT_ALIGNMENT 1
344 /* Node: Type Layout */
346 /* It might seem more natural to have 64-bit ints on a 64-bit machine,
347 but then an occasional MMIX programmer needs to know how to put a lot
348 of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather
349 than the "intuitive" char, short and int types. */
350 #define INT_TYPE_SIZE 32
351 #define SHORT_TYPE_SIZE 16
352 #define LONG_LONG_TYPE_SIZE 64
354 #define FLOAT_TYPE_SIZE 32
355 #define DOUBLE_TYPE_SIZE 64
356 #define LONG_DOUBLE_TYPE_SIZE 64
358 #define DEFAULT_SIGNED_CHAR 1
361 /* Node: Register Basics */
362 /* We tell GCC about all 256 general registers, and we also include
363 rD, rE, rH, rJ and rR (in that order) so we can describe what insns
364 clobber them. We use a faked register for the argument pointer. It is
365 always eliminated towards the frame-pointer or the stack-pointer, never
366 output in assembly. Any fixed register would do for this, like $255,
367 but future debugging is easier when using a separate register. It
368 counts as a global register for pseudorandom reasons. */
369 #define FIRST_PSEUDO_REGISTER 262
371 /* We treat general registers with no assigned purpose as fixed. The
372 stack pointer, $254, is also fixed. Register $255 is referred to as a
373 temporary register in the MMIX papers, and used as such in mmixal, so
374 it should not be used as a stack pointer. We set it to fixed, and use
375 it "manually" at times of despair. */
376 #define FIXED_REGISTERS \
377 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
378 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
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, 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, 0, 0, 0, 0, 0, 0, 0, 1, 1, \
396 /* General registers are fixed and therefore "historically" marked
397 call-used. (FIXME: This has changed). Registers $15..$31 are
398 call-clobbered; we'll put arguments in $16 and up, and we need $15 for
399 the MMIX register-stack "hole". */
400 #define CALL_USED_REGISTERS \
401 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 1, 1, 1, \
411 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
412 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
413 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
414 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
415 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
416 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, \
420 #define CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage ()
422 /* No LOCAL_REGNO, INCOMING_REGNO or OUTGOING_REGNO, since those macros
423 are not usable for MMIX: it doesn't have a fixed register window size.
424 FIXME: Perhaps we should say something about $0..$15 may sometimes be
425 the incoming $16..$31. Those macros need better documentation; it
426 looks like they're just bogus and that FUNCTION_INCOMING_ARG_REGNO_P
427 and FUNCTION_OUTGOING_VALUE should be used where they're used. For the
428 moment, do nothing; things seem to work anyway. */
431 /* Node: Allocation Order */
433 /* We should allocate registers from 0 to 31 by increasing number, because
434 I think that's what people expect. Beyond that, just use
435 call-clobbered global registers first, then call-clobbered special
436 registers. Last, the fixed registers. */
437 #define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER \
438 { 0, 1, 2, 3, 4, 5, 6, 7, \
439 8, 9, 10, 11, 12, 13, 14, 15, \
440 16, 17, 18, 19, 20, 21, 22, 23, \
441 24, 25, 26, 27, 28, 29, 30, 31, \
443 252, 251, 250, 249, 248, 247, \
449 32, 33, 34, 35, 36, 37, 38, 39, \
450 40, 41, 42, 43, 44, 45, 46, 47, \
451 48, 49, 50, 51, 52, 53, 54, 55, \
452 56, 57, 58, 59, 60, 61, 62, 63, \
453 64, 65, 66, 67, 68, 69, 70, 71, \
454 72, 73, 74, 75, 76, 77, 78, 79, \
455 80, 81, 82, 83, 84, 85, 86, 87, \
456 88, 89, 90, 91, 92, 93, 94, 95, \
457 96, 97, 98, 99, 100, 101, 102, 103, \
458 104, 105, 106, 107, 108, 109, 110, 111, \
459 112, 113, 114, 115, 116, 117, 118, 119, \
460 120, 121, 122, 123, 124, 125, 126, 127, \
461 128, 129, 130, 131, 132, 133, 134, 135, \
462 136, 137, 138, 139, 140, 141, 142, 143, \
463 144, 145, 146, 147, 148, 149, 150, 151, \
464 152, 153, 154, 155, 156, 157, 158, 159, \
465 160, 161, 162, 163, 164, 165, 166, 167, \
466 168, 169, 170, 171, 172, 173, 174, 175, \
467 176, 177, 178, 179, 180, 181, 182, 183, \
468 184, 185, 186, 187, 188, 189, 190, 191, \
469 192, 193, 194, 195, 196, 197, 198, 199, \
470 200, 201, 202, 203, 204, 205, 206, 207, \
471 208, 209, 210, 211, 212, 213, 214, 215, \
472 216, 217, 218, 219, 220, 221, 222, 223, \
473 224, 225, 226, 227, 228, 229, 230, 231, \
474 232, 233, 234, 235, 236, 237, 238, 239, \
475 240, 241, 242, 243, 244, 245, 246, \
477 254, 255, 256, 257, 261 \
480 /* As a convenience, we put this nearby, for ease of comparison.
481 First, call-clobbered registers in reverse order of assignment as
482 parameters (also the top ones; not because they're parameters, but
485 Second, saved registers that go on the register-stack.
487 Third, special registers rH, rR and rJ. They should not normally be
488 allocated, but since they're call-clobbered, it is cheaper to use one
489 of them than using a call-saved register for a call-clobbered use,
490 assuming it is referenced a very limited number of times. Other global
491 and fixed registers come next; they are never allocated. */
492 #define MMIX_GNU_ABI_REG_ALLOC_ORDER \
493 { 252, 251, 250, 249, 248, 247, 246, \
494 245, 244, 243, 242, 241, 240, 239, 238, \
495 237, 236, 235, 234, 233, 232, 231, \
497 0, 1, 2, 3, 4, 5, 6, 7, \
498 8, 9, 10, 11, 12, 13, 14, 15, \
499 16, 17, 18, 19, 20, 21, 22, 23, \
500 24, 25, 26, 27, 28, 29, 30, 31, \
506 32, 33, 34, 35, 36, 37, 38, 39, \
507 40, 41, 42, 43, 44, 45, 46, 47, \
508 48, 49, 50, 51, 52, 53, 54, 55, \
509 56, 57, 58, 59, 60, 61, 62, 63, \
510 64, 65, 66, 67, 68, 69, 70, 71, \
511 72, 73, 74, 75, 76, 77, 78, 79, \
512 80, 81, 82, 83, 84, 85, 86, 87, \
513 88, 89, 90, 91, 92, 93, 94, 95, \
514 96, 97, 98, 99, 100, 101, 102, 103, \
515 104, 105, 106, 107, 108, 109, 110, 111, \
516 112, 113, 114, 115, 116, 117, 118, 119, \
517 120, 121, 122, 123, 124, 125, 126, 127, \
518 128, 129, 130, 131, 132, 133, 134, 135, \
519 136, 137, 138, 139, 140, 141, 142, 143, \
520 144, 145, 146, 147, 148, 149, 150, 151, \
521 152, 153, 154, 155, 156, 157, 158, 159, \
522 160, 161, 162, 163, 164, 165, 166, 167, \
523 168, 169, 170, 171, 172, 173, 174, 175, \
524 176, 177, 178, 179, 180, 181, 182, 183, \
525 184, 185, 186, 187, 188, 189, 190, 191, \
526 192, 193, 194, 195, 196, 197, 198, 199, \
527 200, 201, 202, 203, 204, 205, 206, 207, \
528 208, 209, 210, 211, 212, 213, 214, 215, \
529 216, 217, 218, 219, 220, 221, 222, 223, \
530 224, 225, 226, 227, 228, 229, 230, \
532 254, 255, 256, 257, 261 \
535 /* The default one. */
536 #define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER
538 /* Node: Values in Registers */
540 #define HARD_REGNO_NREGS(REGNO, MODE) \
541 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
544 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
546 /* Note that no register can really be accessed in single-float mode, so
547 we *can* say 1 here. FIXME: Will TRT happen for single-float, or do
548 we have to punt to libgcc1.asm? */
549 #define MODES_TIEABLE_P(MODE1, MODE2) 1
552 /* Node: Leaf Functions */
556 /* Node: Register Classes */
560 NO_REGS
, GENERAL_REGS
, REMAINDER_REG
, HIMULT_REG
,
561 SYSTEM_REGS
, ALL_REGS
, LIM_REG_CLASSES
564 #define N_REG_CLASSES (int) LIM_REG_CLASSES
566 #define REG_CLASS_NAMES \
567 {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG", \
568 "SYSTEM_REGS", "ALL_REGS"}
570 /* Note that the contents of each item is always 32 bits. */
571 #define REG_CLASS_CONTENTS \
572 {{0, 0, 0, 0, 0, 0, 0, 0, 0}, \
573 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20}, \
574 {0, 0, 0, 0, 0, 0, 0, 0, 0x10}, \
575 {0, 0, 0, 0, 0, 0, 0, 0, 4}, \
576 {0, 0, 0, 0, 0, 0, 0, 0, 0x3f}, \
577 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x3f}}
579 #define REGNO_REG_CLASS(REGNO) \
580 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
581 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
583 : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG \
584 : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS)
586 #define BASE_REG_CLASS GENERAL_REGS
588 #define INDEX_REG_CLASS GENERAL_REGS
590 #define REG_CLASS_FROM_LETTER(CHAR) \
591 ((CHAR) == 'x' ? SYSTEM_REGS \
592 : (CHAR) == 'y' ? REMAINDER_REG \
593 : (CHAR) == 'z' ? HIMULT_REG : NO_REGS)
595 #define REGNO_OK_FOR_BASE_P(REGNO) \
596 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
597 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
598 || (reg_renumber[REGNO] > 0 \
599 && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER))
601 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO)
603 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
604 mmix_preferred_reload_class (X, CLASS)
606 #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
607 mmix_preferred_output_reload_class (X, CLASS)
609 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
610 mmix_secondary_reload_class (CLASS, MODE, X, 1)
612 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
613 mmix_secondary_reload_class (CLASS, MODE, X, 0)
615 #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE)
617 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
618 mmix_const_ok_for_letter_p (VALUE, C)
620 #define EXTRA_CONSTRAINT(VALUE, C) \
621 mmix_extra_constraint (VALUE, C, MMIX_REG_OK_STRICT)
623 /* Do we need anything serious here? Yes, any FLOT constant. */
624 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
625 mmix_const_double_ok_for_letter_p (VALUE, C)
628 /* Node: Frame Layout */
630 #define STACK_GROWS_DOWNWARD
631 #define FRAME_GROWS_DOWNWARD
633 #define STARTING_FRAME_OFFSET \
634 mmix_starting_frame_offset ()
636 #define FIRST_PARM_OFFSET(FUNDECL) 0
638 #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \
639 mmix_dynamic_chain_address (FRAMEADDR)
641 /* FIXME: It seems RETURN_ADDR_OFFSET is undocumented. */
643 #define SETUP_FRAME_ADDRESSES() \
644 mmix_setup_frame_addresses ()
646 #define RETURN_ADDR_RTX(COUNT, FRAME) \
647 mmix_return_addr_rtx (COUNT, FRAME)
649 /* It's in rJ before we store it somewhere. */
650 #define INCOMING_RETURN_ADDR_RTX \
651 gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
653 /* FIXME: This does not seem properly documented or cross-indexed.
654 Nowhere except in the code does it say it *has* to be in the range
655 0..255, or else it will be truncated. That goes for the default too. */
656 #define DWARF_FRAME_RETURN_COLUMN \
657 DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
659 /* No return address is stored there. */
660 #define INCOMING_FRAME_SP_OFFSET 0
662 /* Node: Stack Checking */
666 /* Node: Exception Handling */
668 #define EH_RETURN_DATA_REGNO(N) \
669 mmix_eh_return_data_regno (N)
671 #define EH_RETURN_STACKADJ_RTX \
672 mmix_eh_return_stackadj_rtx ()
674 #define EH_RETURN_HANDLER_RTX \
675 mmix_eh_return_handler_rtx ()
677 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
678 mmix_asm_preferred_eh_data_format (CODE, GLOBAL)
680 /* Node: Frame Registers */
681 #define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM
683 /* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on
684 what register we want to use. */
685 #define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM
686 #define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM
688 #define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM
691 /* Node: Elimination */
692 /* FIXME: Is this requirement built-in? Anyway, we should try to get rid
693 of it; we can deduce the value. */
694 #define FRAME_POINTER_REQUIRED (nonlocal_goto_stack_level != NULL_RTX)
696 /* The frame-pointer is stored in a location that either counts to the
697 offset of incoming parameters, or that counts to the offset of the
698 frame, so we can't use a single offset. We therefore eliminate those
700 #define ELIMINABLE_REGS \
701 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
702 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
703 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
705 /* We need not worry about when the frame-pointer is required for other
706 reasons; GCC takes care of those cases. */
707 #define CAN_ELIMINATE(FROM, TO) 1
709 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
710 (OFFSET) = mmix_initial_elimination_offset (FROM, TO)
713 /* Node: Stack Arguments */
715 #define ACCUMULATE_OUTGOING_ARGS 1
717 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0
720 /* Node: Register Arguments */
721 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
722 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 0)
724 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
725 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 1)
727 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
728 mmix_function_arg_pass_by_reference (&(CUM), MODE, TYPE, NAMED)
730 /* This *sounds* good, but does not seem to be implemented correctly to
731 be a win; at least it wasn't in 2.7.2. FIXME: Check and perhaps
732 replace with a big comment. */
733 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) 1
735 typedef struct { int regs
; int lib
; int now_varargs
; } CUMULATIVE_ARGS
;
737 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
738 ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0), (CUM).now_varargs = 0)
740 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
742 = ((MUST_PASS_IN_STACK (MODE, TYPE)) \
743 || (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE) > 8 \
744 && !TARGET_LIBFUNC && !(CUM).lib)) \
745 ? (MMIX_MAX_ARGS_IN_REGS) + 1 \
746 : (CUM).regs + (7 + (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE))) / 8)
748 #define FUNCTION_ARG_REGNO_P(REGNO) \
749 mmix_function_arg_regno_p (REGNO, 0)
751 #define FUNCTION_INCOMING_ARG_REGNO_P(REGNO) \
752 mmix_function_arg_regno_p (REGNO, 1)
755 /* Node: Register Arguments */
757 #define FUNCTION_VALUE(VALTYPE, FUNC) \
758 gen_rtx_REG (TYPE_MODE (VALTYPE), MMIX_RETURN_VALUE_REGNUM)
760 /* This needs to take care of the register hole for complex return values. */
761 #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) \
762 mmix_function_outgoing_value (VALTYPE, FUNC)
764 #define LIBCALL_VALUE(MODE) \
765 gen_rtx_REG (MODE, MMIX_OUTGOING_RETURN_VALUE_REGNUM)
767 #define FUNCTION_VALUE_REGNO_P(REGNO) \
768 ((REGNO) == MMIX_OUTGOING_RETURN_VALUE_REGNUM)
771 /* Node: Aggregate Return */
773 #define STRUCT_VALUE_REGNUM MMIX_STRUCT_VALUE_REGNUM
776 /* Node: Caller Saves */
780 /* Node: Function Entry */
782 /* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and
783 TARGET_ASM_FUNCTION_EPILOGUE. */
785 /* We need to say that the epilogue uses the return address, so the
786 initial-value machinery restores it. FIXME: Some targets
787 conditionalize on "reload_completed &&". Investigate difference.
788 FIXME: Not needed if nonlocal_goto_stack_level. */
789 #define EPILOGUE_USES(REGNO) \
790 ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
792 #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
793 mmix_asm_output_mi_thunk (FILE, THUNK_FNDECL, DELTA, FUNCTION)
796 /* Node: Profiling */
797 #define FUNCTION_PROFILER(FILE, LABELNO) \
798 mmix_function_profiler (FILE, LABELNO)
802 /* For the moment, let's stick to pushing argument registers on the stack.
803 Later, we can parse all arguments in registers, to improve
805 #define SETUP_INCOMING_VARARGS(A, M, T, P, S) \
806 mmix_setup_incoming_varargs(&(A), M, T, &(P), S)
808 /* FIXME: This and other EXPAND_BUILTIN_VA_... target macros are not
809 documented, although used by several targets. */
810 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
811 mmix_expand_builtin_va_arg (VALIST, TYPE)
813 /* Node: Trampolines */
815 #define TRAMPOLINE_TEMPLATE(FILE) \
816 mmix_trampoline_template (FILE)
818 #define TRAMPOLINE_SIZE mmix_trampoline_size
819 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
820 mmix_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
823 /* Node: Library Calls */
825 #define TARGET_MEM_FUNCTIONS
828 /* Node: Addressing Modes */
830 #define CONSTANT_ADDRESS_P(X) \
831 mmix_constant_address_p (X)
833 #define MAX_REGS_PER_ADDRESS 2
835 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
836 if (mmix_legitimate_address (MODE, X, MMIX_REG_OK_STRICT)) \
839 #ifndef REG_OK_STRICT
840 # define REG_OK_FOR_BASE_P(X) \
841 (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \
842 || REGNO (X) == MMIX_ARG_POINTER_REGNUM \
843 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
845 # define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
846 #endif /* REG_OK_STRICT */
848 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
850 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
852 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
854 #define LEGITIMATE_CONSTANT_P(X) \
855 mmix_legitimate_constant_p (X)
858 /* Node: Condition Code */
860 #define SELECT_CC_MODE(OP, X, Y) \
861 mmix_select_cc_mode (OP, X, Y)
863 /* A definition of CANONICALIZE_COMPARISON that changed LE and GT
864 comparisons with -1 to LT and GE respectively, and LT, LTU, GE or GEU
865 comparisons with 256 to 255 and LE, LEU, GT and GTU has been
866 ineffective; the code path for performing the changes did not trig for
867 neither the GCC test-suite nor ghostscript-6.52 nor Knuth's mmix.tar.gz
868 itself (core GCC functionality supposedly handling it) with sources
871 #define REVERSIBLE_CC_MODE(MODE) \
872 mmix_reversible_cc_mode (MODE)
877 /* This one takes on both the RTX_COSTS and CONST_COSTS tasks. */
878 #define DEFAULT_RTX_COSTS(X, CODE, OUTER_CODE) \
881 if (mmix_rtx_cost_recalculated (X, CODE, OUTER_CODE, \
883 return mmix_rtx_cost; \
886 #define ADDRESS_COST(ADDRESS) mmix_address_cost (ADDRESS)
888 /* The special registers can only move to and from general regs, and we
889 need to check that their constraints match, so say 3 for them. */
890 /* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2)
891 miscompiles reload1.c:reload_cse_simplify_set; a call to
892 reload_cse_regno_equal_p is missing when checking if a substitution of
893 a register setting is valid if this is defined to just the expression
894 in mmix_register_move_cost.
896 Symptom: a (all?) register setting is optimized away for e.g.
897 "char *p1(char *p) { return p+1; }" and the value of register zero ($0)
900 We can workaround by making this a function call - unknown if this
901 causes dire speed effects. */
902 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
903 mmix_register_move_cost (MODE, FROM, TO)
905 #define SLOW_BYTE_ACCESS 0
910 /* This must be a constant string, since it's used in crtstuff.c. */
911 #define TEXT_SECTION_ASM_OP \
912 "\t.text ! mmixal:= 9H LOC 8B"
914 /* FIXME: Not documented. */
915 #define DATA_SECTION_ASM_OP \
916 mmix_data_section_asm_op ()
918 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata"
924 /* Node: File Framework */
926 #define ASM_FILE_START(STREAM) \
927 mmix_asm_file_start (STREAM)
929 #define ASM_FILE_END(STREAM) \
930 mmix_asm_file_end (STREAM)
932 /* While any other punctuation character but ";" would do, we prefer "%"
933 or "!"; "!" is an unary operator and so will not be mistakenly included
934 in correctly formed expressions. The hash character adds mass; catches
935 the eye. We can't have it as a comment char by itself, since it's a
936 hex-number prefix. */
937 #define ASM_COMMENT_START "!#"
939 /* These aren't currently functional. We just keep them as markers. */
940 #define ASM_APP_ON "%APP\n"
941 #define ASM_APP_OFF "%NO_APP\n"
943 #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \
944 mmix_asm_output_source_filename (STREAM, NAME)
946 #define OUTPUT_QUOTED_STRING(STREAM, STRING) \
947 mmix_output_quoted_string (STREAM, STRING, strlen (STRING))
949 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) \
950 mmix_asm_output_source_line (STREAM, LINE)
952 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
955 /* Node: Data Output */
957 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \
958 mmix_asm_output_ascii (STREAM, PTR, LEN)
960 /* Node: Uninitialized Data */
962 #define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \
963 mmix_asm_output_aligned_common (ST, N, S, A)
965 #define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \
966 mmix_asm_output_aligned_local (ST, N, S, A)
969 /* Node: Label Output */
971 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
972 mmix_asm_output_label (STREAM, NAME)
974 #define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \
975 mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME)
977 #define ASM_GLOBALIZE_LABEL(STREAM, NAME) \
978 mmix_asm_globalize_label (STREAM, NAME)
980 #define ASM_WEAKEN_LABEL(STREAM, NAME) \
981 mmix_asm_weaken_label (STREAM, NAME)
983 #define MAKE_DECL_ONE_ONLY(DECL) \
984 mmix_make_decl_one_only (DECL)
986 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
987 mmix_asm_output_labelref (STREAM, NAME)
989 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
990 mmix_asm_output_internal_label (STREAM, PREFIX, NUM)
992 /* We insert a ":" to disambiguate against user symbols like L5. */
993 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
994 sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM))
996 /* Insert "::"; these are rarer than internal labels. FIXME: Make sure no
997 ":" is seen in the object file; we don't really want that mmixal
998 feature visible there. We don't want the default, which uses a dot;
999 that'd be incompatible with mmixal. */
1000 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
1001 ((OUTPUT) = (char *) alloca (strlen ((NAME)) + 2 + 10), \
1002 sprintf ((OUTPUT), "%s::%d", (NAME), (LABELNO)))
1004 #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \
1005 mmix_asm_output_def (STREAM, NAME, VALUE)
1007 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(STREAM, SY, HI, LO) \
1008 mmix_asm_output_define_label_difference_symbol (STREAM, SY, HI, LO)
1011 /* Node: Macros for Initialization */
1012 /* We're compiling to ELF and linking to MMO; fundamental ELF features
1013 that GCC depend on are there. */
1015 /* These must be constant strings, since they're used in crtstuff.c. */
1016 #define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible"
1018 #define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible"
1020 #define OBJECT_FORMAT_ELF
1023 /* Node: Instruction Output */
1025 /* The non-$ register names must be prefixed with ":", since they're
1026 affected by PREFIX. We provide the non-colon names as additional
1028 #define REGISTER_NAMES \
1029 {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \
1030 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \
1031 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \
1032 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31", \
1033 "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39", \
1034 "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47", \
1035 "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55", \
1036 "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63", \
1037 "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71", \
1038 "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79", \
1039 "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87", \
1040 "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95", \
1041 "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103", \
1042 "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111", \
1043 "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119", \
1044 "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127", \
1045 "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135", \
1046 "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143", \
1047 "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151", \
1048 "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159", \
1049 "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167", \
1050 "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175", \
1051 "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183", \
1052 "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191", \
1053 "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199", \
1054 "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207", \
1055 "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215", \
1056 "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223", \
1057 "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231", \
1058 "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239", \
1059 "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247", \
1060 "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255", \
1061 ":rD", ":rE", ":rH", ":rJ", ":rR", "ap_!BAD!"}
1063 #define ADDITIONAL_REGISTER_NAMES \
1064 {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257}, \
1065 {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}}
1067 #define PRINT_OPERAND(STREAM, X, CODE) \
1068 mmix_print_operand (STREAM, X, CODE)
1070 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
1071 mmix_print_operand_punct_valid_p (CODE)
1073 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
1074 mmix_print_operand_address (STREAM, X)
1076 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
1077 mmix_asm_output_reg_push (STREAM, REGNO)
1079 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
1080 mmix_asm_output_reg_pop (STREAM, REGNO)
1083 /* Node: Dispatch Tables */
1085 /* We define both types, since SImode is the better, but DImode the only
1086 possible for mmixal so that's the one actually used. */
1087 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
1088 mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL)
1090 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
1091 mmix_asm_output_addr_vec_elt (STREAM, VALUE)
1094 /* Node: Exception Region Output */
1097 /* Node: Alignment Output */
1099 #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
1100 mmix_asm_output_skip (STREAM, NBYTES)
1102 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
1103 mmix_asm_output_align (STREAM, POWER)
1106 /* Node: All Debuggers */
1108 #define DBX_REGISTER_NUMBER(REGNO) \
1109 mmix_dbx_register_number (REGNO)
1112 /* Node: DBX Options */
1114 /* Node: DBX Hooks */
1116 /* Node: File Names and DBX */
1120 /* Node: SDB and DWARF */
1121 #define DWARF2_DEBUGGING_INFO
1122 #define DWARF2_ASM_LINE_DEBUG_INFO 1
1126 #define PREDICATE_CODES \
1127 {"mmix_reg_cc_operand", {SUBREG, REG}}, \
1128 {"mmix_foldable_comparison_operator", \
1129 {NE, EQ, GE, GT, LE, LT}}, \
1130 /* All '<', actually. */ \
1131 {"mmix_comparison_operator", \
1132 {NE, EQ, GE, GT, LE, LT, GEU, GTU, LEU, \
1133 LTU, UNORDERED, ORDERED, UNEQ, UNGE, UNLE, \
1135 {"mmix_symbolic_or_address_operand", \
1136 {SYMBOL_REF, LABEL_REF, CONST, \
1137 SUBREG, REG, PLUS}}, \
1138 {"mmix_reg_or_constant_operand", \
1139 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1140 {"mmix_reg_or_8bit_operand", \
1141 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1142 {"mmix_reg_or_0_operand", \
1143 {CONST_INT, CONST_DOUBLE, SUBREG, REG}},
1145 #define SPECIAL_MODE_PREDICATES "mmix_symbolic_or_address_operand",
1147 /* There's no way to get a PC-relative offset into tables for SImode, so
1148 for the moment we have absolute entries in DImode.
1149 When we're going ELF, these should be SImode and 1. */
1150 #define CASE_VECTOR_MODE DImode
1151 #define CASE_VECTOR_PC_RELATIVE 0
1153 #define WORD_REGISTER_OPERATIONS
1155 /* We have a choice, which makes this yet another parameter to tweak. The
1156 gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent
1157 than "unsigned int", and we have signed characters. FIXME: measure. */
1158 #define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND)
1162 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1164 /* We have a choice here too. */
1166 /* FIXME: Revisit, we don't have scc expanders yet. */
1167 #define STORE_FLAG_VALUE 1
1170 #define Pmode DImode
1172 #define FUNCTION_MODE QImode
1174 #define NO_IMPLICIT_EXTERN_C
1176 #define HANDLE_SYSV_PRAGMA
1178 /* These are checked. */
1179 #define DOLLARS_IN_IDENTIFIERS 0
1180 #define NO_DOLLAR_IN_LABEL
1181 #define NO_DOT_IN_LABEL
1183 /* Calculate the highest used supposed saved stack register. */
1184 #define MACHINE_DEPENDENT_REORG(INSN) \
1185 mmix_machine_dependent_reorg (INSN)
1187 #endif /* GCC_MMIX_H */
1190 * eval: (c-set-style "gnu")
1191 * indent-tabs-mode: t