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_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") }, \
133 {"set-data-start=", &mmix_cc1_ignored_option, \
134 N_("Set start-address of data")}}
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 offseting from those
173 registers (automatically causing a request for a suitable constant base
174 address register) without having to know the specific register or the
175 specific offset. The setback is that there's a limited number of
176 registers, and you'll not find out until link time whether you
177 should've compiled with -mno-base-addresses. */
178 #define TARGET_MASK_BASE_ADDRESSES 128
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 bitfield 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 #define PROMOTE_FUNCTION_ARGS
299 /* Apparently not doing TRT if int < register-size. FIXME: Perhaps
300 FUNCTION_VALUE and LIBCALL_VALUE needs tweaking as some ports say. */
301 #define PROMOTE_FUNCTION_RETURN
304 /* I'm a little bit undecided about this one. It might be beneficial to
305 promote all operations. */
306 #define PROMOTE_FOR_CALL_ONLY
308 /* We need to align everything to 64 bits that can affect the alignment
309 of other types. Since address N is interpreted in MMIX as (N modulo
310 access_size), we must align. */
311 #define PARM_BOUNDARY 64
312 #define STACK_BOUNDARY 64
313 #define FUNCTION_BOUNDARY 32
314 #define BIGGEST_ALIGNMENT 64
316 /* This one is only used in the ADA front end. */
317 #define MINIMUM_ATOMIC_ALIGNMENT 8
319 /* Copied from elfos.h. */
320 #define MAX_OFILE_ALIGNMENT (32768 * 8)
322 #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
323 mmix_data_alignment (TYPE, BASIC_ALIGN)
325 #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
326 mmix_constant_alignment (CONSTANT, BASIC_ALIGN)
328 #define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \
329 mmix_local_alignment (TYPE, BASIC_ALIGN)
331 /* Following other ports, this seems to most commonly be the word-size,
332 so let's do that here too. */
333 #define EMPTY_FIELD_BOUNDARY 64
335 /* We chose to have this low solely for similarity with the alpha. It has
336 nothing to do with passing the tests dg/c99-scope-2 and
337 execute/align-1.c. Nothing. Though the tests seem wrong. Padding of
338 the structure is automatically added to get alignment when needed if we
339 set this to just byte-boundary. */
340 #define STRUCTURE_SIZE_BOUNDARY 8
342 /* The lower bits are ignored. */
343 #define STRICT_ALIGNMENT 1
346 /* Node: Type Layout */
348 /* It might seem more natural to have 64-bit ints on a 64-bit machine,
349 but then an occasional MMIX programmer needs to know how to put a lot
350 of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather
351 than the "intuitive" char, short and int types. */
352 #define INT_TYPE_SIZE 32
353 #define SHORT_TYPE_SIZE 16
354 #define LONG_LONG_TYPE_SIZE 64
356 #define FLOAT_TYPE_SIZE 32
357 #define DOUBLE_TYPE_SIZE 64
358 #define LONG_DOUBLE_TYPE_SIZE 64
360 #define DEFAULT_SIGNED_CHAR 1
363 /* Node: Register Basics */
364 /* We tell GCC about all 256 general registers, and we also include
365 rD, rE, rH, rJ, rR and rO (in that order) so we can describe what insns
366 clobber them. We use a faked register for the argument pointer. It is
367 always eliminated towards the frame-pointer or the stack-pointer, never
368 output in assembly. Any fixed register would do for this, like $255,
369 but future debugging is easier when using a separate register. It
370 counts as a global register for pseudorandom reasons. */
371 #define FIRST_PSEUDO_REGISTER 263
373 /* We treat general registers with no assigned purpose as fixed. The
374 stack pointer, $254, is also fixed. Register $255 is referred to as a
375 temporary register in the MMIX papers, and used as such in mmixal, so
376 it should not be used as a stack pointer. We set it to fixed, and use
377 it "manually" at times of despair. */
378 #define FIXED_REGISTERS \
379 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
380 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
381 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
382 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
383 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
384 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
385 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
386 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
387 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
388 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
389 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
390 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
391 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
392 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
393 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
394 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, \
395 1, 1, 0, 0, 0, 1, 1 \
398 /* General registers are fixed and therefore "historically" marked
399 call-used. (FIXME: This has changed). Registers $15..$31 are
400 call-clobbered; we'll put arguments in $16 and up, and we need $15 for
401 the MMIX register-stack "hole". */
402 #define CALL_USED_REGISTERS \
403 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, \
404 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
405 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
406 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
407 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
408 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
409 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
410 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
411 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
412 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
413 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
414 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
415 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
416 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
417 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
418 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, \
419 1, 1, 1, 1, 1, 1, 1 \
422 #define CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage ()
424 /* No INCOMING_REGNO or OUTGOING_REGNO, since those macros are not usable
425 for MMIX: it doesn't have a fixed register window size. FIXME: Perhaps
426 we should say something about $0..$15 may sometimes be the incoming
427 $16..$31. Those macros need better documentation; it looks like
428 they're just bogus and that FUNCTION_INCOMING_ARG_REGNO_P and
429 FUNCTION_OUTGOING_VALUE should be used where they're used. For the
430 moment, do nothing; things seem to work anyway. */
432 /* Defining LOCAL_REGNO is necessary in presence of prologue/epilogue,
433 else GCC will be confused that those registers aren't saved and
435 #define LOCAL_REGNO(REGNO) mmix_local_regno (REGNO)
437 /* Node: Allocation Order */
439 /* We should allocate registers from 0 to 31 by increasing number, because
440 I think that's what people expect. Beyond that, just use
441 call-clobbered global registers first, then call-clobbered special
442 registers. Last, the fixed registers. */
443 #define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER \
444 { 0, 1, 2, 3, 4, 5, 6, 7, \
445 8, 9, 10, 11, 12, 13, 14, 15, \
446 16, 17, 18, 19, 20, 21, 22, 23, \
447 24, 25, 26, 27, 28, 29, 30, 31, \
449 252, 251, 250, 249, 248, 247, \
455 32, 33, 34, 35, 36, 37, 38, 39, \
456 40, 41, 42, 43, 44, 45, 46, 47, \
457 48, 49, 50, 51, 52, 53, 54, 55, \
458 56, 57, 58, 59, 60, 61, 62, 63, \
459 64, 65, 66, 67, 68, 69, 70, 71, \
460 72, 73, 74, 75, 76, 77, 78, 79, \
461 80, 81, 82, 83, 84, 85, 86, 87, \
462 88, 89, 90, 91, 92, 93, 94, 95, \
463 96, 97, 98, 99, 100, 101, 102, 103, \
464 104, 105, 106, 107, 108, 109, 110, 111, \
465 112, 113, 114, 115, 116, 117, 118, 119, \
466 120, 121, 122, 123, 124, 125, 126, 127, \
467 128, 129, 130, 131, 132, 133, 134, 135, \
468 136, 137, 138, 139, 140, 141, 142, 143, \
469 144, 145, 146, 147, 148, 149, 150, 151, \
470 152, 153, 154, 155, 156, 157, 158, 159, \
471 160, 161, 162, 163, 164, 165, 166, 167, \
472 168, 169, 170, 171, 172, 173, 174, 175, \
473 176, 177, 178, 179, 180, 181, 182, 183, \
474 184, 185, 186, 187, 188, 189, 190, 191, \
475 192, 193, 194, 195, 196, 197, 198, 199, \
476 200, 201, 202, 203, 204, 205, 206, 207, \
477 208, 209, 210, 211, 212, 213, 214, 215, \
478 216, 217, 218, 219, 220, 221, 222, 223, \
479 224, 225, 226, 227, 228, 229, 230, 231, \
480 232, 233, 234, 235, 236, 237, 238, 239, \
481 240, 241, 242, 243, 244, 245, 246, \
483 254, 255, 256, 257, 261, 262 \
486 /* As a convenience, we put this nearby, for ease of comparison.
487 First, call-clobbered registers in reverse order of assignment as
488 parameters (also the top ones; not because they're parameters, but
491 Second, saved registers that go on the register-stack.
493 Third, special registers rH, rR and rJ. They should not normally be
494 allocated, but since they're call-clobbered, it is cheaper to use one
495 of them than using a call-saved register for a call-clobbered use,
496 assuming it is referenced a very limited number of times. Other global
497 and fixed registers come next; they are never allocated. */
498 #define MMIX_GNU_ABI_REG_ALLOC_ORDER \
499 { 252, 251, 250, 249, 248, 247, 246, \
500 245, 244, 243, 242, 241, 240, 239, 238, \
501 237, 236, 235, 234, 233, 232, 231, \
503 0, 1, 2, 3, 4, 5, 6, 7, \
504 8, 9, 10, 11, 12, 13, 14, 15, \
505 16, 17, 18, 19, 20, 21, 22, 23, \
506 24, 25, 26, 27, 28, 29, 30, 31, \
512 32, 33, 34, 35, 36, 37, 38, 39, \
513 40, 41, 42, 43, 44, 45, 46, 47, \
514 48, 49, 50, 51, 52, 53, 54, 55, \
515 56, 57, 58, 59, 60, 61, 62, 63, \
516 64, 65, 66, 67, 68, 69, 70, 71, \
517 72, 73, 74, 75, 76, 77, 78, 79, \
518 80, 81, 82, 83, 84, 85, 86, 87, \
519 88, 89, 90, 91, 92, 93, 94, 95, \
520 96, 97, 98, 99, 100, 101, 102, 103, \
521 104, 105, 106, 107, 108, 109, 110, 111, \
522 112, 113, 114, 115, 116, 117, 118, 119, \
523 120, 121, 122, 123, 124, 125, 126, 127, \
524 128, 129, 130, 131, 132, 133, 134, 135, \
525 136, 137, 138, 139, 140, 141, 142, 143, \
526 144, 145, 146, 147, 148, 149, 150, 151, \
527 152, 153, 154, 155, 156, 157, 158, 159, \
528 160, 161, 162, 163, 164, 165, 166, 167, \
529 168, 169, 170, 171, 172, 173, 174, 175, \
530 176, 177, 178, 179, 180, 181, 182, 183, \
531 184, 185, 186, 187, 188, 189, 190, 191, \
532 192, 193, 194, 195, 196, 197, 198, 199, \
533 200, 201, 202, 203, 204, 205, 206, 207, \
534 208, 209, 210, 211, 212, 213, 214, 215, \
535 216, 217, 218, 219, 220, 221, 222, 223, \
536 224, 225, 226, 227, 228, 229, 230, \
538 254, 255, 256, 257, 261, 262 \
541 /* The default one. */
542 #define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER
544 /* Node: Values in Registers */
546 #define HARD_REGNO_NREGS(REGNO, MODE) \
547 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \
550 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
552 /* Note that no register can really be accessed in single-float mode, so
553 we *can* say 1 here. FIXME: Will TRT happen for single-float, or do
554 we have to punt to libgcc1.asm? */
555 #define MODES_TIEABLE_P(MODE1, MODE2) 1
558 /* Node: Leaf Functions */
562 /* Node: Register Classes */
566 NO_REGS
, GENERAL_REGS
, REMAINDER_REG
, HIMULT_REG
,
567 SYSTEM_REGS
, ALL_REGS
, LIM_REG_CLASSES
570 #define N_REG_CLASSES (int) LIM_REG_CLASSES
572 #define REG_CLASS_NAMES \
573 {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG", \
574 "SYSTEM_REGS", "ALL_REGS"}
576 /* Note that the contents of each item is always 32 bits. */
577 #define REG_CLASS_CONTENTS \
578 {{0, 0, 0, 0, 0, 0, 0, 0, 0}, \
579 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20}, \
580 {0, 0, 0, 0, 0, 0, 0, 0, 0x10}, \
581 {0, 0, 0, 0, 0, 0, 0, 0, 4}, \
582 {0, 0, 0, 0, 0, 0, 0, 0, 0x7f}, \
583 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x7f}}
585 #define REGNO_REG_CLASS(REGNO) \
586 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
587 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
589 : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG \
590 : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS)
592 #define BASE_REG_CLASS GENERAL_REGS
594 #define INDEX_REG_CLASS GENERAL_REGS
596 #define REG_CLASS_FROM_LETTER(CHAR) \
597 ((CHAR) == 'x' ? SYSTEM_REGS \
598 : (CHAR) == 'y' ? REMAINDER_REG \
599 : (CHAR) == 'z' ? HIMULT_REG : NO_REGS)
601 #define REGNO_OK_FOR_BASE_P(REGNO) \
602 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \
603 || (REGNO) == MMIX_ARG_POINTER_REGNUM \
604 || (reg_renumber[REGNO] > 0 \
605 && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER))
607 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO)
609 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
610 mmix_preferred_reload_class (X, CLASS)
612 #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
613 mmix_preferred_output_reload_class (X, CLASS)
615 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
616 mmix_secondary_reload_class (CLASS, MODE, X, 1)
618 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
619 mmix_secondary_reload_class (CLASS, MODE, X, 0)
621 #define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE)
623 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
624 mmix_const_ok_for_letter_p (VALUE, C)
626 #define EXTRA_CONSTRAINT(VALUE, C) \
627 mmix_extra_constraint (VALUE, C, MMIX_REG_OK_STRICT)
629 /* Do we need anything serious here? Yes, any FLOT constant. */
630 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
631 mmix_const_double_ok_for_letter_p (VALUE, C)
634 /* Node: Frame Layout */
636 #define STACK_GROWS_DOWNWARD
637 #define FRAME_GROWS_DOWNWARD
639 #define STARTING_FRAME_OFFSET \
640 mmix_starting_frame_offset ()
642 #define FIRST_PARM_OFFSET(FUNDECL) 0
644 #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \
645 mmix_dynamic_chain_address (FRAMEADDR)
647 /* FIXME: It seems RETURN_ADDR_OFFSET is undocumented. */
649 #define SETUP_FRAME_ADDRESSES() \
650 mmix_setup_frame_addresses ()
652 #define RETURN_ADDR_RTX(COUNT, FRAME) \
653 mmix_return_addr_rtx (COUNT, FRAME)
655 /* It's in rJ before we store it somewhere. */
656 #define INCOMING_RETURN_ADDR_RTX \
657 gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
659 /* FIXME: This does not seem properly documented or cross-indexed.
660 Nowhere except in the code does it say it *has* to be in the range
661 0..255, or else it will be truncated. That goes for the default too. */
662 #define DWARF_FRAME_RETURN_COLUMN \
663 DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
665 /* No return address is stored there. */
666 #define INCOMING_FRAME_SP_OFFSET 0
668 /* Node: Stack Checking */
672 /* Node: Exception Handling */
674 #define EH_RETURN_DATA_REGNO(N) \
675 mmix_eh_return_data_regno (N)
677 #define EH_RETURN_STACKADJ_RTX \
678 mmix_eh_return_stackadj_rtx ()
680 #define EH_RETURN_HANDLER_RTX \
681 mmix_eh_return_handler_rtx ()
683 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
684 mmix_asm_preferred_eh_data_format (CODE, GLOBAL)
686 /* Node: Frame Registers */
687 #define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM
689 /* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on
690 what register we want to use. */
691 #define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM
692 #define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM
694 #define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM
697 /* Node: Elimination */
698 /* FIXME: Is this requirement built-in? Anyway, we should try to get rid
699 of it; we can deduce the value. */
700 #define FRAME_POINTER_REQUIRED (nonlocal_goto_stack_level != NULL_RTX)
702 /* The frame-pointer is stored in a location that either counts to the
703 offset of incoming parameters, or that counts to the offset of the
704 frame, so we can't use a single offset. We therefore eliminate those
706 #define ELIMINABLE_REGS \
707 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
708 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
709 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
711 /* We need not worry about when the frame-pointer is required for other
712 reasons; GCC takes care of those cases. */
713 #define CAN_ELIMINATE(FROM, TO) 1
715 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
716 (OFFSET) = mmix_initial_elimination_offset (FROM, TO)
719 /* Node: Stack Arguments */
721 #define ACCUMULATE_OUTGOING_ARGS 1
723 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0
726 /* Node: Register Arguments */
727 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
728 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 0)
730 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
731 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 1)
733 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
734 mmix_function_arg_pass_by_reference (&(CUM), MODE, TYPE, NAMED)
736 /* This *sounds* good, but does not seem to be implemented correctly to
737 be a win; at least it wasn't in 2.7.2. FIXME: Check and perhaps
738 replace with a big comment. */
739 #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) 1
741 typedef struct { int regs
; int lib
; int now_varargs
; } CUMULATIVE_ARGS
;
743 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
744 ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0), (CUM).now_varargs = 0)
746 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
748 = ((MUST_PASS_IN_STACK (MODE, TYPE)) \
749 || (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE) > 8 \
750 && !TARGET_LIBFUNC && !(CUM).lib)) \
751 ? (MMIX_MAX_ARGS_IN_REGS) + 1 \
752 : (CUM).regs + (7 + (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE))) / 8)
754 #define FUNCTION_ARG_REGNO_P(REGNO) \
755 mmix_function_arg_regno_p (REGNO, 0)
757 #define FUNCTION_INCOMING_ARG_REGNO_P(REGNO) \
758 mmix_function_arg_regno_p (REGNO, 1)
761 /* Node: Register Arguments */
763 #define FUNCTION_VALUE(VALTYPE, FUNC) \
764 gen_rtx_REG (TYPE_MODE (VALTYPE), MMIX_RETURN_VALUE_REGNUM)
766 /* This needs to take care of the register hole for complex return values. */
767 #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) \
768 mmix_function_outgoing_value (VALTYPE, FUNC)
770 #define LIBCALL_VALUE(MODE) \
771 gen_rtx_REG (MODE, MMIX_OUTGOING_RETURN_VALUE_REGNUM)
773 #define FUNCTION_VALUE_REGNO_P(REGNO) \
774 ((REGNO) == MMIX_OUTGOING_RETURN_VALUE_REGNUM)
777 /* Node: Aggregate Return */
779 #define STRUCT_VALUE_REGNUM MMIX_STRUCT_VALUE_REGNUM
782 /* Node: Caller Saves */
786 /* Node: Function Entry */
788 /* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and
789 TARGET_ASM_FUNCTION_EPILOGUE. */
791 /* We need to say that the epilogue uses the return address, so the
792 initial-value machinery restores it. FIXME: Some targets
793 conditionalize on "reload_completed &&". Investigate difference.
794 FIXME: Not needed if nonlocal_goto_stack_level. */
795 #define EPILOGUE_USES(REGNO) \
796 ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
798 #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
799 mmix_asm_output_mi_thunk (FILE, THUNK_FNDECL, DELTA, FUNCTION)
802 /* Node: Profiling */
803 #define FUNCTION_PROFILER(FILE, LABELNO) \
804 mmix_function_profiler (FILE, LABELNO)
808 /* For the moment, let's stick to pushing argument registers on the stack.
809 Later, we can parse all arguments in registers, to improve
811 #define SETUP_INCOMING_VARARGS(A, M, T, P, S) \
812 mmix_setup_incoming_varargs(&(A), M, T, &(P), S)
814 /* FIXME: This and other EXPAND_BUILTIN_VA_... target macros are not
815 documented, although used by several targets. */
816 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
817 mmix_expand_builtin_va_arg (VALIST, TYPE)
819 /* Node: Trampolines */
821 #define TRAMPOLINE_TEMPLATE(FILE) \
822 mmix_trampoline_template (FILE)
824 #define TRAMPOLINE_SIZE mmix_trampoline_size
825 #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
826 mmix_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
829 /* Node: Library Calls */
831 #define TARGET_MEM_FUNCTIONS
834 /* Node: Addressing Modes */
836 #define CONSTANT_ADDRESS_P(X) \
837 mmix_constant_address_p (X)
839 #define MAX_REGS_PER_ADDRESS 2
841 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
842 if (mmix_legitimate_address (MODE, X, MMIX_REG_OK_STRICT)) \
845 #ifndef REG_OK_STRICT
846 # define REG_OK_FOR_BASE_P(X) \
847 (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \
848 || REGNO (X) == MMIX_ARG_POINTER_REGNUM \
849 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
851 # define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
852 #endif /* REG_OK_STRICT */
854 #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
856 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN)
858 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
860 #define LEGITIMATE_CONSTANT_P(X) \
861 mmix_legitimate_constant_p (X)
864 /* Node: Condition Code */
866 #define SELECT_CC_MODE(OP, X, Y) \
867 mmix_select_cc_mode (OP, X, Y)
869 /* A definition of CANONICALIZE_COMPARISON that changed LE and GT
870 comparisons with -1 to LT and GE respectively, and LT, LTU, GE or GEU
871 comparisons with 256 to 255 and LE, LEU, GT and GTU has been
872 ineffective; the code path for performing the changes did not trig for
873 neither the GCC test-suite nor ghostscript-6.52 nor Knuth's mmix.tar.gz
874 itself (core GCC functionality supposedly handling it) with sources
877 #define REVERSIBLE_CC_MODE(MODE) \
878 mmix_reversible_cc_mode (MODE)
883 /* This one takes on both the RTX_COSTS and CONST_COSTS tasks. */
884 #define DEFAULT_RTX_COSTS(X, CODE, OUTER_CODE) \
887 if (mmix_rtx_cost_recalculated (X, CODE, OUTER_CODE, \
889 return mmix_rtx_cost; \
892 #define ADDRESS_COST(ADDRESS) mmix_address_cost (ADDRESS)
894 /* The special registers can only move to and from general regs, and we
895 need to check that their constraints match, so say 3 for them. */
896 /* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2)
897 miscompiles reload1.c:reload_cse_simplify_set; a call to
898 reload_cse_regno_equal_p is missing when checking if a substitution of
899 a register setting is valid if this is defined to just the expression
900 in mmix_register_move_cost.
902 Symptom: a (all?) register setting is optimized away for e.g.
903 "char *p1(char *p) { return p+1; }" and the value of register zero ($0)
906 We can workaround by making this a function call - unknown if this
907 causes dire speed effects. */
908 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
909 mmix_register_move_cost (MODE, FROM, TO)
911 #define SLOW_BYTE_ACCESS 0
916 /* This must be a constant string, since it's used in crtstuff.c. */
917 #define TEXT_SECTION_ASM_OP \
918 "\t.text ! mmixal:= 9H LOC 8B"
920 /* FIXME: Not documented. */
921 #define DATA_SECTION_ASM_OP \
922 mmix_data_section_asm_op ()
924 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata"
930 /* Node: File Framework */
932 #define ASM_FILE_START(STREAM) \
933 mmix_asm_file_start (STREAM)
935 #define ASM_FILE_END(STREAM) \
936 mmix_asm_file_end (STREAM)
938 /* While any other punctuation character but ";" would do, we prefer "%"
939 or "!"; "!" is an unary operator and so will not be mistakenly included
940 in correctly formed expressions. The hash character adds mass; catches
941 the eye. We can't have it as a comment char by itself, since it's a
942 hex-number prefix. */
943 #define ASM_COMMENT_START "!#"
945 /* These aren't currently functional. We just keep them as markers. */
946 #define ASM_APP_ON "%APP\n"
947 #define ASM_APP_OFF "%NO_APP\n"
949 #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \
950 mmix_asm_output_source_filename (STREAM, NAME)
952 #define OUTPUT_QUOTED_STRING(STREAM, STRING) \
953 mmix_output_quoted_string (STREAM, STRING, strlen (STRING))
955 #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) \
956 mmix_asm_output_source_line (STREAM, LINE)
958 #define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
961 /* Node: Data Output */
963 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \
964 mmix_asm_output_ascii (STREAM, PTR, LEN)
966 /* Node: Uninitialized Data */
968 #define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \
969 mmix_asm_output_aligned_common (ST, N, S, A)
971 #define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \
972 mmix_asm_output_aligned_local (ST, N, S, A)
975 /* Node: Label Output */
977 #define ASM_OUTPUT_LABEL(STREAM, NAME) \
978 mmix_asm_output_label (STREAM, NAME)
980 #define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \
981 mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME)
983 #define ASM_GLOBALIZE_LABEL(STREAM, NAME) \
984 mmix_asm_globalize_label (STREAM, NAME)
986 #define ASM_WEAKEN_LABEL(STREAM, NAME) \
987 mmix_asm_weaken_label (STREAM, NAME)
989 #define MAKE_DECL_ONE_ONLY(DECL) \
990 mmix_make_decl_one_only (DECL)
992 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
993 mmix_asm_output_labelref (STREAM, NAME)
995 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
996 mmix_asm_output_internal_label (STREAM, PREFIX, NUM)
998 /* We insert a ":" to disambiguate against user symbols like L5. */
999 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
1000 sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM))
1002 /* Insert "::"; these are rarer than internal labels. FIXME: Make sure no
1003 ":" is seen in the object file; we don't really want that mmixal
1004 feature visible there. We don't want the default, which uses a dot;
1005 that'd be incompatible with mmixal. */
1006 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
1007 ((OUTPUT) = (char *) alloca (strlen ((NAME)) + 2 + 10), \
1008 sprintf ((OUTPUT), "%s::%d", (NAME), (LABELNO)))
1010 #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \
1011 mmix_asm_output_def (STREAM, NAME, VALUE)
1013 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(STREAM, SY, HI, LO) \
1014 mmix_asm_output_define_label_difference_symbol (STREAM, SY, HI, LO)
1017 /* Node: Macros for Initialization */
1018 /* We're compiling to ELF and linking to MMO; fundamental ELF features
1019 that GCC depend on are there. */
1021 /* These must be constant strings, since they're used in crtstuff.c. */
1022 #define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible"
1024 #define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible"
1026 #define OBJECT_FORMAT_ELF
1029 /* Node: Instruction Output */
1031 /* The non-$ register names must be prefixed with ":", since they're
1032 affected by PREFIX. We provide the non-colon names as additional
1034 #define REGISTER_NAMES \
1035 {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \
1036 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \
1037 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \
1038 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31", \
1039 "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39", \
1040 "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47", \
1041 "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55", \
1042 "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63", \
1043 "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71", \
1044 "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79", \
1045 "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87", \
1046 "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95", \
1047 "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103", \
1048 "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111", \
1049 "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119", \
1050 "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127", \
1051 "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135", \
1052 "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143", \
1053 "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151", \
1054 "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159", \
1055 "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167", \
1056 "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175", \
1057 "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183", \
1058 "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191", \
1059 "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199", \
1060 "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207", \
1061 "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215", \
1062 "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223", \
1063 "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231", \
1064 "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239", \
1065 "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247", \
1066 "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255", \
1067 ":rD", ":rE", ":rH", ":rJ", ":rR", "ap_!BAD!", ":rO"}
1069 #define ADDITIONAL_REGISTER_NAMES \
1070 {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257}, \
1071 {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}, {"rO", MMIX_rO_REGNUM}}
1073 #define PRINT_OPERAND(STREAM, X, CODE) \
1074 mmix_print_operand (STREAM, X, CODE)
1076 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
1077 mmix_print_operand_punct_valid_p (CODE)
1079 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
1080 mmix_print_operand_address (STREAM, X)
1082 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
1083 mmix_asm_output_reg_push (STREAM, REGNO)
1085 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
1086 mmix_asm_output_reg_pop (STREAM, REGNO)
1089 /* Node: Dispatch Tables */
1091 /* We define both types, since SImode is the better, but DImode the only
1092 possible for mmixal so that's the one actually used. */
1093 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
1094 mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL)
1096 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
1097 mmix_asm_output_addr_vec_elt (STREAM, VALUE)
1100 /* Node: Exception Region Output */
1103 /* Node: Alignment Output */
1105 #define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
1106 mmix_asm_output_skip (STREAM, NBYTES)
1108 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
1109 mmix_asm_output_align (STREAM, POWER)
1112 /* Node: All Debuggers */
1114 #define DBX_REGISTER_NUMBER(REGNO) \
1115 mmix_dbx_register_number (REGNO)
1118 /* Node: DBX Options */
1120 /* Node: DBX Hooks */
1122 /* Node: File Names and DBX */
1126 /* Node: SDB and DWARF */
1127 #define DWARF2_DEBUGGING_INFO
1128 #define DWARF2_ASM_LINE_DEBUG_INFO 1
1132 #define PREDICATE_CODES \
1133 {"mmix_reg_cc_operand", {SUBREG, REG}}, \
1134 {"mmix_foldable_comparison_operator", \
1135 {NE, EQ, GE, GT, LE, LT}}, \
1136 /* All '<', actually. */ \
1137 {"mmix_comparison_operator", \
1138 {NE, EQ, GE, GT, LE, LT, GEU, GTU, LEU, \
1139 LTU, UNORDERED, ORDERED, UNEQ, UNGE, UNLE, \
1141 {"mmix_symbolic_or_address_operand", \
1142 {SYMBOL_REF, LABEL_REF, CONST, \
1143 SUBREG, REG, PLUS}}, \
1144 {"mmix_reg_or_constant_operand", \
1145 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1146 {"mmix_reg_or_8bit_operand", \
1147 {CONST_INT, CONST_DOUBLE, SUBREG, REG}}, \
1148 {"mmix_reg_or_0_operand", \
1149 {CONST_INT, CONST_DOUBLE, SUBREG, REG}},
1151 #define SPECIAL_MODE_PREDICATES "mmix_symbolic_or_address_operand",
1153 /* There's no way to get a PC-relative offset into tables for SImode, so
1154 for the moment we have absolute entries in DImode.
1155 When we're going ELF, these should be SImode and 1. */
1156 #define CASE_VECTOR_MODE DImode
1157 #define CASE_VECTOR_PC_RELATIVE 0
1159 #define WORD_REGISTER_OPERATIONS
1161 /* We have a choice, which makes this yet another parameter to tweak. The
1162 gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent
1163 than "unsigned int", and we have signed characters. FIXME: measure. */
1164 #define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND)
1168 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1170 /* We have a choice here too. */
1172 /* FIXME: Revisit, we don't have scc expanders yet. */
1173 #define STORE_FLAG_VALUE 1
1176 #define Pmode DImode
1178 #define FUNCTION_MODE QImode
1180 #define NO_IMPLICIT_EXTERN_C
1182 #define HANDLE_SYSV_PRAGMA
1184 /* These are checked. */
1185 #define DOLLARS_IN_IDENTIFIERS 0
1186 #define NO_DOLLAR_IN_LABEL
1187 #define NO_DOT_IN_LABEL
1189 /* Calculate the highest used supposed saved stack register. */
1190 #define MACHINE_DEPENDENT_REORG(INSN) \
1191 mmix_machine_dependent_reorg (INSN)
1193 #endif /* GCC_MMIX_H */
1196 * eval: (c-set-style "gnu")
1197 * indent-tabs-mode: t