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1 38 julius 
/* Definitions of target machine for GNU compiler, for MMIX.
2 
   Copyright (C) 2000, 2001, 2002, 2004, 2005, 2007 Free Software Foundation, Inc.
3 
   Contributed by Hans-Peter Nilsson (hp@bitrange.com)
4 
 
5 
This file is part of GCC.
6 
 
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 3, or (at your option)
10 
any later version.
11 
 
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.
16 
 
17 
You should have received a copy of the GNU General Public License
18 
along with GCC; see the file COPYING3.  If not see
19 
<http://www.gnu.org/licenses/>.  */
20 
 
21 
#ifndef GCC_MMIX_H
22 
#define GCC_MMIX_H
23 
 
24 
/* First, some local helper macros.  Note that the "default" value of
25 
   FIXED_REGISTERS, CALL_USED_REGISTERS, REG_ALLOC_ORDER and
26 
   REG_CLASS_CONTENTS depend on these values.  */
27 
#define MMIX_RESERVED_GNU_ARG_0_REGNUM 231
28 
#define MMIX_FIRST_ARG_REGNUM \
29 
  (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 16)
30 
#define MMIX_FIRST_INCOMING_ARG_REGNUM \
31 
  (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 0)
32 
#define MMIX_MAX_ARGS_IN_REGS 16
33 
 
34 
/* FIXME: This one isn't fully implemented yet.  Return values larger than
35 
   one register are passed by reference in MMIX_STRUCT_VALUE_REGNUM by the
36 
   caller, except for return values of type "complex".  */
37 
#define MMIX_MAX_REGS_FOR_VALUE 16
38 
#define MMIX_RETURN_VALUE_REGNUM \
39 
  (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 15)
40 
#define MMIX_OUTGOING_RETURN_VALUE_REGNUM \
41 
  (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 0)
42 
#define MMIX_STRUCT_VALUE_REGNUM 251
43 
#define MMIX_STATIC_CHAIN_REGNUM 252
44 
#define MMIX_FRAME_POINTER_REGNUM 253
45 
#define MMIX_STACK_POINTER_REGNUM 254
46 
#define MMIX_LAST_GENERAL_REGISTER 255
47 
#define MMIX_INCOMING_RETURN_ADDRESS_REGNUM MMIX_rJ_REGNUM
48 
#define MMIX_HIMULT_REGNUM 258
49 
#define MMIX_REMAINDER_REGNUM MMIX_rR_REGNUM
50 
#define MMIX_ARG_POINTER_REGNUM 261
51 
#define MMIX_rO_REGNUM 262
52 
#define MMIX_LAST_STACK_REGISTER_REGNUM 31
53 
 
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)
59 
 
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
64 
#endif
65 
 
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
68 
#endif
69 
 
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
73 
 
74 
#ifdef REG_OK_STRICT
75 
# define MMIX_REG_OK_STRICT 1
76 
#else
77 
# define MMIX_REG_OK_STRICT 0
78 
#endif
79 
 
80 
#define MMIX_FUNCTION_ARG_SIZE(MODE, TYPE) \
81 
 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) : int_size_in_bytes (TYPE))
82 
 
83 
/* Declarations for helper variables that are not tied to a particular
84 
   target macro.  */
85 
extern GTY(()) rtx mmix_compare_op0;
86 
extern GTY(()) rtx mmix_compare_op1;
87 
 
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
90 
   mmix.md too.  */
91 
struct machine_function GTY(())
92 
 {
93 
   int has_landing_pad;
94 
   int highest_saved_stack_register;
95 
   int in_prologue;
96 
 };
97 
 
98 
/* For these target macros, there is no generic documentation here.  You
99 
   should read `Using and Porting GCC' for that.  Only comments specific
100 
   to the MMIX target are here.
101 
 
102 
   There are however references to the specific texinfo node (comments
103 
   with "Node:"), so there should be little or nothing amiss.  Probably
104 
   the opposite, since we don't have to care about old littering and
105 
   soon outdated generic comments.  */
106 
 
107 
/* Node: Driver */
108 
 
109 
/* User symbols are in the same name-space as built-in symbols, but we
110 
   don't need the built-in symbols, so remove those and instead apply
111 
   stricter operand checking.  Don't warn when expanding insns.  */
112 
#define ASM_SPEC "-no-predefined-syms -x"
113 
 
114 
/* Pass on -mset-program-start=N and -mset-data-start=M to the linker.
115 
   Provide default program start 0x100 unless -mno-set-program-start.
116 
   Don't do this if linking relocatably, with -r.  For a final link,
117 
   produce mmo, unless ELF is requested or when linking relocatably.  */
118 
#define LINK_SPEC \
119 
 "%{mset-program-start=*:--defsym __.MMIX.start..text=%*}\
120 
  %{mset-data-start=*:--defsym __.MMIX.start..data=%*}\
121 
  %{!mset-program-start=*:\
122 
    %{!mno-set-program-start:\
123 
     %{!r:--defsym __.MMIX.start..text=0x100}}}\
124 
  %{!melf:%{!r:-m mmo}}%{melf|r:-m elf64mmix}"
125 
 
126 
/* FIXME: There's no provision for profiling here.  */
127 
#define STARTFILE_SPEC  \
128 
  "crti%O%s crtbegin%O%s"
129 
 
130 
#define ENDFILE_SPEC "crtend%O%s crtn%O%s"
131 
 
132 
/* Node: Run-time Target */
133 
 
134 
/* Define __LONG_MAX__, since we're advised not to change glimits.h.  */
135 
#define TARGET_CPU_CPP_BUILTINS()                               \
136 
  do                                                            \
137 
    {                                                           \
138 
      builtin_define ("__mmix__");                              \
139 
      builtin_define ("__MMIX__");                              \
140 
      if (TARGET_ABI_GNU)                                       \
141 
        builtin_define ("__MMIX_ABI_GNU__");                    \
142 
      else                                                      \
143 
        builtin_define ("__MMIX_ABI_MMIXWARE__");               \
144 
    }                                                           \
145 
  while (0)
146 
 
147 
extern int target_flags;
148 
 
149 
#define TARGET_DEFAULT \
150 
 (MASK_BRANCH_PREDICT | MASK_BASE_ADDRESSES | MASK_USE_RETURN_INSN)
151 
 
152 
/* Unfortunately, this must not reference anything in "mmix.c".  */
153 
#define TARGET_VERSION \
154 
  fprintf (stderr, " (MMIX)")
155 
 
156 
#define OVERRIDE_OPTIONS mmix_override_options ()
157 
 
158 
#define OPTIMIZATION_OPTIONS(LEVEL, SIZE)       \
159 
  do                                            \
160 
    {                                           \
161 
      if (LEVEL >= 1)                           \
162 
        flag_regmove = TRUE;                    \
163 
                                                \
164 
      if (SIZE || LEVEL > 1)                    \
165 
        {                                       \
166 
          flag_omit_frame_pointer = TRUE;       \
167 
        }                                       \
168 
    }                                           \
169 
  while (0)
170 
 
171 
/* This one will have to wait a little bit; right now we can't debug
172 
   neither with or without a frame-pointer.  */
173 
/* #define CAN_DEBUG_WITHOUT_FP */
174 
 
175 
 
176 
/* Node: Per-Function Data */
177 
#define INIT_EXPANDERS mmix_init_expanders ()
178 
 
179 
 
180 
/* Node: Storage Layout */
181 
/* I see no bit-field instructions.  Anyway, the common order is from low
182 
   to high, as the power of two, hence little-endian.  */
183 
#define BITS_BIG_ENDIAN 0
184 
#define BYTES_BIG_ENDIAN 1
185 
#define WORDS_BIG_ENDIAN 1
186 
#define FLOAT_WORDS_BIG_ENDIAN 1
187 
#define UNITS_PER_WORD 8
188 
 
189 
/* FIXME: Promotion of modes currently generates slow code, extending
190 
   before every operation.  */
191 
/* I'm a little bit undecided about this one.  It might be beneficial to
192 
   promote all operations.  */
193 
 
194 
#define PROMOTE_FUNCTION_MODE(MODE, UNSIGNEDP, TYPE)    \
195 
 do {                                           \
196 
  if (GET_MODE_CLASS (MODE) == MODE_INT         \
197 
      && GET_MODE_SIZE (MODE) < 8)              \
198 
   {                                            \
199 
     (MODE) = DImode;                           \
200 
     /* Do the following some time later,       \
201 
        scrutinizing differences.  */           \
202 
     if (0) (UNSIGNEDP) = 0;                      \
203 
   }                                            \
204 
 } while (0)
205 
 
206 
/* We need to align everything to 64 bits that can affect the alignment
207 
   of other types.  Since address N is interpreted in MMIX as (N modulo
208 
   access_size), we must align.  */
209 
#define PARM_BOUNDARY 64
210 
#define STACK_BOUNDARY 64
211 
#define FUNCTION_BOUNDARY 32
212 
#define BIGGEST_ALIGNMENT 64
213 
 
214 
/* This one is only used in the ADA front end.  */
215 
#define MINIMUM_ATOMIC_ALIGNMENT 8
216 
 
217 
/* Copied from elfos.h.  */
218 
#define MAX_OFILE_ALIGNMENT (32768 * 8)
219 
 
220 
#define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
221 
 mmix_data_alignment (TYPE, BASIC_ALIGN)
222 
 
223 
#define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
224 
 mmix_constant_alignment (CONSTANT, BASIC_ALIGN)
225 
 
226 
#define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \
227 
 mmix_local_alignment (TYPE, BASIC_ALIGN)
228 
 
229 
/* Following other ports, this seems to most commonly be the word-size,
230 
   so let's do that here too.  */
231 
#define EMPTY_FIELD_BOUNDARY 64
232 
 
233 
/* We chose to have this low solely for similarity with the alpha.  It has
234 
   nothing to do with passing the tests dg/c99-scope-2 and
235 
   execute/align-1.c.  Nothing.  Though the tests seem wrong.  Padding of
236 
   the structure is automatically added to get alignment when needed if we
237 
   set this to just byte-boundary.  */
238 
#define STRUCTURE_SIZE_BOUNDARY 8
239 
 
240 
/* The lower bits are ignored.  */
241 
#define STRICT_ALIGNMENT 1
242 
 
243 
 
244 
/* Node: Type Layout */
245 
 
246 
/* It might seem more natural to have 64-bit ints on a 64-bit machine,
247 
   but then an occasional MMIX programmer needs to know how to put a lot
248 
   of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather
249 
   than the "intuitive" char, short and int types.  */
250 
#define INT_TYPE_SIZE 32
251 
#define SHORT_TYPE_SIZE 16
252 
#define LONG_LONG_TYPE_SIZE 64
253 
 
254 
#define FLOAT_TYPE_SIZE 32
255 
#define DOUBLE_TYPE_SIZE 64
256 
#define LONG_DOUBLE_TYPE_SIZE 64
257 
 
258 
#define DEFAULT_SIGNED_CHAR 1
259 
 
260 
 
261 
/* Node: Register Basics */
262 
/* We tell GCC about all 256 general registers, and we also include
263 
   rD, rE, rH, rJ, rR and rO (in that order) so we can describe what insns
264 
   clobber them.  We use a faked register for the argument pointer.  It is
265 
   always eliminated towards the frame-pointer or the stack-pointer, never
266 
   output in assembly.  Any fixed register would do for this, like $255,
267 
   but future debugging is easier when using a separate register.  It
268 
   counts as a global register for pseudorandom reasons.  */
269 
#define FIRST_PSEUDO_REGISTER 263
270 
 
271 
/* We treat general registers with no assigned purpose as fixed.  The
272 
   stack pointer, $254, is also fixed.  Register $255 is referred to as a
273 
   temporary register in the MMIX papers, and used as such in mmixal, so
274 
   it should not be used as a stack pointer.  We set it to fixed, and use
275 
   it "manually" at times of despair.  */
276 
#define FIXED_REGISTERS \
277 
 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
278 
   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
279 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
280 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
281 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
282 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
283 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
284 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
285 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
286 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
287 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
288 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
289 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
290 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
291 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
292 
   1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, \
293 
   1, 1, 0, 0, 0, 1, 1 \
294 
 }
295 
 
296 
/* General registers are fixed and therefore "historically" marked
297 
   call-used.  (FIXME: This has changed).  Registers $15..$31 are
298 
   call-clobbered; we'll put arguments in $16 and up, and we need $15 for
299 
   the MMIX register-stack "hole".  */
300 
#define CALL_USED_REGISTERS \
301 
 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, \
302 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
303 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
304 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
305 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
306 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
307 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
308 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
309 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
310 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
311 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
312 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
313 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
314 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
315 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
316 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, \
317 
   1, 1, 1, 1, 1, 1, 1 \
318 
 }
319 
 
320 
#define CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage ()
321 
 
322 
/* No INCOMING_REGNO or OUTGOING_REGNO, since those macros are not usable
323 
   for MMIX: it doesn't have a fixed register window size.  FIXME: Perhaps
324 
   we should say something about $0..$15 may sometimes be the incoming
325 
   $16..$31.  Those macros need better documentation; it looks like
326 
   they're just bogus and that FUNCTION_INCOMING_ARG_REGNO_P and
327 
   FUNCTION_OUTGOING_VALUE should be used where they're used.  For the
328 
   moment, do nothing; things seem to work anyway.  */
329 
 
330 
/* Defining LOCAL_REGNO is necessary in presence of prologue/epilogue,
331 
   else GCC will be confused that those registers aren't saved and
332 
   restored.  */
333 
#define LOCAL_REGNO(REGNO) mmix_local_regno (REGNO)
334 
 
335 
/* Node: Allocation Order */
336 
 
337 
/* We should allocate registers from 0 to 31 by increasing number, because
338 
   I think that's what people expect.  Beyond that, just use
339 
   call-clobbered global registers first, then call-clobbered special
340 
   registers.  Last, the fixed registers.  */
341 
#define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER       \
342 
 { 0, 1, 2, 3, 4, 5, 6, 7,                       \
343 
   8, 9, 10, 11, 12, 13, 14, 15,                \
344 
   16, 17, 18, 19, 20, 21, 22, 23,              \
345 
   24, 25, 26, 27, 28, 29, 30, 31,              \
346 
                                                \
347 
   252, 251, 250, 249, 248, 247,                \
348 
                                                \
349 
   253,                                         \
350 
                                                \
351 
   258, 260, 259,                               \
352 
                                                \
353 
   32, 33, 34, 35, 36, 37, 38, 39,              \
354 
   40, 41, 42, 43, 44, 45, 46, 47,              \
355 
   48, 49, 50, 51, 52, 53, 54, 55,              \
356 
   56, 57, 58, 59, 60, 61, 62, 63,              \
357 
   64, 65, 66, 67, 68, 69, 70, 71,              \
358 
   72, 73, 74, 75, 76, 77, 78, 79,              \
359 
   80, 81, 82, 83, 84, 85, 86, 87,              \
360 
   88, 89, 90, 91, 92, 93, 94, 95,              \
361 
   96, 97, 98, 99, 100, 101, 102, 103,          \
362 
   104, 105, 106, 107, 108, 109, 110, 111,      \
363 
   112, 113, 114, 115, 116, 117, 118, 119,      \
364 
   120, 121, 122, 123, 124, 125, 126, 127,      \
365 
   128, 129, 130, 131, 132, 133, 134, 135,      \
366 
   136, 137, 138, 139, 140, 141, 142, 143,      \
367 
   144, 145, 146, 147, 148, 149, 150, 151,      \
368 
   152, 153, 154, 155, 156, 157, 158, 159,      \
369 
   160, 161, 162, 163, 164, 165, 166, 167,      \
370 
   168, 169, 170, 171, 172, 173, 174, 175,      \
371 
   176, 177, 178, 179, 180, 181, 182, 183,      \
372 
   184, 185, 186, 187, 188, 189, 190, 191,      \
373 
   192, 193, 194, 195, 196, 197, 198, 199,      \
374 
   200, 201, 202, 203, 204, 205, 206, 207,      \
375 
   208, 209, 210, 211, 212, 213, 214, 215,      \
376 
   216, 217, 218, 219, 220, 221, 222, 223,      \
377 
   224, 225, 226, 227, 228, 229, 230, 231,      \
378 
   232, 233, 234, 235, 236, 237, 238, 239,      \
379 
   240, 241, 242, 243, 244, 245, 246,           \
380 
                                                \
381 
   254, 255, 256, 257, 261, 262                 \
382 
 }
383 
 
384 
/* As a convenience, we put this nearby, for ease of comparison.
385 
   First, call-clobbered registers in reverse order of assignment as
386 
   parameters (also the top ones; not because they're parameters, but
387 
   for continuity).
388 
 
389 
   Second, saved registers that go on the register-stack.
390 
 
391 
   Third, special registers rH, rR and rJ.  They should not normally be
392 
   allocated, but since they're call-clobbered, it is cheaper to use one
393 
   of them than using a call-saved register for a call-clobbered use,
394 
   assuming it is referenced a very limited number of times.  Other global
395 
   and fixed registers come next; they are never allocated.  */
396 
#define MMIX_GNU_ABI_REG_ALLOC_ORDER            \
397 
 { 252, 251, 250, 249, 248, 247, 246,           \
398 
   245, 244, 243, 242, 241, 240, 239, 238,      \
399 
   237, 236, 235, 234, 233, 232, 231,           \
400 
                                                \
401 
   0, 1, 2, 3, 4, 5, 6, 7,                       \
402 
   8, 9, 10, 11, 12, 13, 14, 15,                \
403 
   16, 17, 18, 19, 20, 21, 22, 23,              \
404 
   24, 25, 26, 27, 28, 29, 30, 31,              \
405 
                                                \
406 
   253,                                         \
407 
                                                \
408 
   258, 260, 259,                               \
409 
                                                \
410 
   32, 33, 34, 35, 36, 37, 38, 39,              \
411 
   40, 41, 42, 43, 44, 45, 46, 47,              \
412 
   48, 49, 50, 51, 52, 53, 54, 55,              \
413 
   56, 57, 58, 59, 60, 61, 62, 63,              \
414 
   64, 65, 66, 67, 68, 69, 70, 71,              \
415 
   72, 73, 74, 75, 76, 77, 78, 79,              \
416 
   80, 81, 82, 83, 84, 85, 86, 87,              \
417 
   88, 89, 90, 91, 92, 93, 94, 95,              \
418 
   96, 97, 98, 99, 100, 101, 102, 103,          \
419 
   104, 105, 106, 107, 108, 109, 110, 111,      \
420 
   112, 113, 114, 115, 116, 117, 118, 119,      \
421 
   120, 121, 122, 123, 124, 125, 126, 127,      \
422 
   128, 129, 130, 131, 132, 133, 134, 135,      \
423 
   136, 137, 138, 139, 140, 141, 142, 143,      \
424 
   144, 145, 146, 147, 148, 149, 150, 151,      \
425 
   152, 153, 154, 155, 156, 157, 158, 159,      \
426 
   160, 161, 162, 163, 164, 165, 166, 167,      \
427 
   168, 169, 170, 171, 172, 173, 174, 175,      \
428 
   176, 177, 178, 179, 180, 181, 182, 183,      \
429 
   184, 185, 186, 187, 188, 189, 190, 191,      \
430 
   192, 193, 194, 195, 196, 197, 198, 199,      \
431 
   200, 201, 202, 203, 204, 205, 206, 207,      \
432 
   208, 209, 210, 211, 212, 213, 214, 215,      \
433 
   216, 217, 218, 219, 220, 221, 222, 223,      \
434 
   224, 225, 226, 227, 228, 229, 230,           \
435 
                                                \
436 
   254, 255, 256, 257, 261, 262                 \
437 
 }
438 
 
439 
/* The default one.  */
440 
#define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER
441 
 
442 
/* Node: Values in Registers */
443 
 
444 
#define HARD_REGNO_NREGS(REGNO, MODE)                   \
445 
   ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1)         \
446 
    / UNITS_PER_WORD)
447 
 
448 
#define HARD_REGNO_MODE_OK(REGNO, MODE) 1
449 
 
450 
/* Note that no register can really be accessed in single-float mode, so
451 
   we *can* say 1 here.  FIXME:  Will TRT happen for single-float, or do
452 
   we have to punt to libgcc1.asm?  */
453 
#define MODES_TIEABLE_P(MODE1, MODE2) 1
454 
 
455 
 
456 
/* Node: Leaf Functions */
457 
/* (empty) */
458 
 
459 
 
460 
/* Node: Register Classes */
461 
 
462 
enum reg_class
463 
 {
464 
   NO_REGS, GENERAL_REGS, REMAINDER_REG, HIMULT_REG,
465 
   SYSTEM_REGS, ALL_REGS, LIM_REG_CLASSES
466 
 };
467 
 
468 
#define N_REG_CLASSES (int) LIM_REG_CLASSES
469 
 
470 
#define REG_CLASS_NAMES                                         \
471 
 {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG",     \
472 
  "SYSTEM_REGS", "ALL_REGS"}
473 
 
474 
/* Note that the contents of each item is always 32 bits.  */
475 
#define REG_CLASS_CONTENTS                      \
476 
 {{0, 0, 0, 0, 0, 0, 0, 0, 0},                   \
477 
  {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20},       \
478 
  {0, 0, 0, 0, 0, 0, 0, 0, 0x10},               \
479 
  {0, 0, 0, 0, 0, 0, 0, 0, 4},                  \
480 
  {0, 0, 0, 0, 0, 0, 0, 0, 0x7f},               \
481 
  {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x7f}}
482 
 
483 
#define REGNO_REG_CLASS(REGNO)                                  \
484 
 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER                         \
485 
  || (REGNO) == MMIX_ARG_POINTER_REGNUM                         \
486 
  ? GENERAL_REGS                                                \
487 
  : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG            \
488 
  : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS)
489 
 
490 
#define BASE_REG_CLASS GENERAL_REGS
491 
 
492 
#define INDEX_REG_CLASS GENERAL_REGS
493 
 
494 
#define REG_CLASS_FROM_LETTER(CHAR)             \
495 
 ((CHAR) == 'x' ? SYSTEM_REGS                   \
496 
  : (CHAR) == 'y' ? REMAINDER_REG               \
497 
  : (CHAR) == 'z' ? HIMULT_REG : NO_REGS)
498 
 
499 
#define REGNO_OK_FOR_BASE_P(REGNO)                              \
500 
 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER                         \
501 
  || (REGNO) == MMIX_ARG_POINTER_REGNUM                         \
502 
  || (reg_renumber[REGNO] > 0                                    \
503 
      && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER))
504 
 
505 
#define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO)
506 
 
507 
#define PREFERRED_RELOAD_CLASS(X, CLASS) \
508 
 mmix_preferred_reload_class (X, CLASS)
509 
 
510 
#define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
511 
 mmix_preferred_output_reload_class (X, CLASS)
512 
 
513 
#define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
514 
 mmix_secondary_reload_class (CLASS, MODE, X, 1)
515 
 
516 
#define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
517 
 mmix_secondary_reload_class (CLASS, MODE, X, 0)
518 
 
519 
#define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE)
520 
 
521 
#define CONST_OK_FOR_LETTER_P(VALUE, C) \
522 
 mmix_const_ok_for_letter_p (VALUE, C)
523 
 
524 
#define EXTRA_CONSTRAINT(VALUE, C)      \
525 
 mmix_extra_constraint (VALUE, C, MMIX_REG_OK_STRICT)
526 
 
527 
/* Do we need anything serious here?  Yes, any FLOT constant.  */
528 
#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)                  \
529 
 mmix_const_double_ok_for_letter_p (VALUE, C)
530 
 
531 
 
532 
/* Node: Frame Layout */
533 
 
534 
#define STACK_GROWS_DOWNWARD
535 
#define FRAME_GROWS_DOWNWARD 1
536 
 
537 
#define STARTING_FRAME_OFFSET \
538 
  mmix_starting_frame_offset ()
539 
 
540 
#define FIRST_PARM_OFFSET(FUNDECL) 0
541 
 
542 
#define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \
543 
 mmix_dynamic_chain_address (FRAMEADDR)
544 
 
545 
/* FIXME: It seems RETURN_ADDR_OFFSET is undocumented.  */
546 
 
547 
#define SETUP_FRAME_ADDRESSES() \
548 
 mmix_setup_frame_addresses ()
549 
 
550 
#define RETURN_ADDR_RTX(COUNT, FRAME)           \
551 
 mmix_return_addr_rtx (COUNT, FRAME)
552 
 
553 
/* It's in rJ before we store it somewhere.  */
554 
#define INCOMING_RETURN_ADDR_RTX \
555 
 gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
556 
 
557 
/* FIXME: This does not seem properly documented or cross-indexed.
558 
   Nowhere except in the code does it say it *has* to be in the range
559 
   0..255, or else it will be truncated.  That goes for the default too.  */
560 
#define DWARF_FRAME_RETURN_COLUMN \
561 
 DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
562 
 
563 
/* No return address is stored there.  */
564 
#define INCOMING_FRAME_SP_OFFSET 0
565 
 
566 
/* Node: Stack Checking */
567 
/* (empty) */
568 
 
569 
 
570 
/* Node: Exception Handling */
571 
 
572 
#define EH_RETURN_DATA_REGNO(N) \
573 
 mmix_eh_return_data_regno (N)
574 
 
575 
#define EH_RETURN_STACKADJ_RTX \
576 
 mmix_eh_return_stackadj_rtx ()
577 
 
578 
#define EH_RETURN_HANDLER_RTX \
579 
 mmix_eh_return_handler_rtx ()
580 
 
581 
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
582 
 mmix_asm_preferred_eh_data_format (CODE, GLOBAL)
583 
 
584 
/* Node: Frame Registers */
585 
#define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM
586 
 
587 
/* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on
588 
   what register we want to use.  */
589 
#define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM
590 
#define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM
591 
 
592 
#define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM
593 
 
594 
 
595 
/* Node: Elimination */
596 
/* FIXME: Is this requirement built-in?  Anyway, we should try to get rid
597 
   of it; we can deduce the value.  */
598 
#define FRAME_POINTER_REQUIRED  current_function_has_nonlocal_label
599 
 
600 
/* The frame-pointer is stored in a location that either counts to the
601 
   offset of incoming parameters, or that counts to the offset of the
602 
   frame, so we can't use a single offset.  We therefore eliminate those
603 
   two separately.  */
604 
#define ELIMINABLE_REGS                         \
605 
 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM},   \
606 
  {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},   \
607 
  {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
608 
 
609 
/* We need not worry about when the frame-pointer is required for other
610 
   reasons; GCC takes care of those cases.  */
611 
#define CAN_ELIMINATE(FROM, TO) 1
612 
 
613 
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
614 
 (OFFSET) = mmix_initial_elimination_offset (FROM, TO)
615 
 
616 
 
617 
/* Node: Stack Arguments */
618 
 
619 
#define ACCUMULATE_OUTGOING_ARGS 1
620 
 
621 
#define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0
622 
 
623 
 
624 
/* Node: Register Arguments */
625 
#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)    \
626 
 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 0)
627 
 
628 
#define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED)   \
629 
 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 1)
630 
 
631 
typedef struct { int regs; int lib; } CUMULATIVE_ARGS;
632 
 
633 
#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
634 
 ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0))
635 
 
636 
#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)            \
637 
 ((CUM).regs                                                    \
638 
  = ((targetm.calls.must_pass_in_stack (MODE, TYPE))            \
639 
     || (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE) > 8                \
640 
         && !TARGET_LIBFUNC && !(CUM).lib))                     \
641 
  ? (MMIX_MAX_ARGS_IN_REGS) + 1                                 \
642 
  : (CUM).regs + (7 + (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE))) / 8)
643 
 
644 
#define FUNCTION_ARG_REGNO_P(REGNO)             \
645 
 mmix_function_arg_regno_p (REGNO, 0)
646 
 
647 
#define FUNCTION_INCOMING_ARG_REGNO_P(REGNO)            \
648 
 mmix_function_arg_regno_p (REGNO, 1)
649 
 
650 
 
651 
/* Node: Register Arguments */
652 
 
653 
#define FUNCTION_VALUE(VALTYPE, FUNC)  \
654 
 gen_rtx_REG (TYPE_MODE (VALTYPE), MMIX_RETURN_VALUE_REGNUM)
655 
 
656 
/* This needs to take care of the register hole for complex return values.  */
657 
#define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC)  \
658 
 mmix_function_outgoing_value (VALTYPE, FUNC)
659 
 
660 
#define LIBCALL_VALUE(MODE) \
661 
 gen_rtx_REG (MODE, MMIX_RETURN_VALUE_REGNUM)
662 
 
663 
#define FUNCTION_VALUE_REGNO_P(REGNO) \
664 
 mmix_function_value_regno_p (REGNO)
665 
 
666 
 
667 
/* Node: Caller Saves */
668 
/* (empty) */
669 
 
670 
 
671 
/* Node: Function Entry */
672 
 
673 
/* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and
674 
   TARGET_ASM_FUNCTION_EPILOGUE.  */
675 
 
676 
/* We need to say that the epilogue uses the return address, so the
677 
   initial-value machinery restores it.  FIXME: Some targets
678 
   conditionalize on "reload_completed &&".  Investigate difference.
679 
   FIXME: Not needed if nonlocal_goto_stack_level.  */
680 
#define EPILOGUE_USES(REGNO) \
681 
 ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
682 
 
683 
/* Node: Profiling */
684 
#define FUNCTION_PROFILER(FILE, LABELNO)        \
685 
 mmix_function_profiler (FILE, LABELNO)
686 
 
687 
/* Node: Trampolines */
688 
 
689 
#define TRAMPOLINE_TEMPLATE(FILE) \
690 
 mmix_trampoline_template (FILE)
691 
 
692 
#define TRAMPOLINE_SIZE mmix_trampoline_size
693 
#define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \
694 
 mmix_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN)
695 
 
696 
 
697 
/* Node: Addressing Modes */
698 
 
699 
#define CONSTANT_ADDRESS_P(X) \
700 
 mmix_constant_address_p (X)
701 
 
702 
#define MAX_REGS_PER_ADDRESS 2
703 
 
704 
#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL)                \
705 
 if (mmix_legitimate_address (MODE, X, MMIX_REG_OK_STRICT))     \
706 
   goto LABEL
707 
 
708 
#ifndef REG_OK_STRICT
709 
# define REG_OK_FOR_BASE_P(X)                   \
710 
  (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER      \
711 
   || REGNO (X) == MMIX_ARG_POINTER_REGNUM      \
712 
   || REGNO (X) >= FIRST_PSEUDO_REGISTER)
713 
#else
714 
# define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
715 
#endif /* REG_OK_STRICT */
716 
 
717 
#define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
718 
 
719 
#define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
720 
 
721 
#define LEGITIMATE_CONSTANT_P(X) \
722 
 mmix_legitimate_constant_p (X)
723 
 
724 
 
725 
/* Node: Condition Code */
726 
 
727 
#define SELECT_CC_MODE(OP, X, Y)                \
728 
 mmix_select_cc_mode (OP, X, Y)
729 
 
730 
/* A definition of CANONICALIZE_COMPARISON that changed LE and GT
731 
   comparisons with -1 to LT and GE respectively, and LT, LTU, GE or GEU
732 
   comparisons with 256 to 255 and LE, LEU, GT and GTU has been
733 
   ineffective; the code path for performing the changes did not trig for
734 
   neither the GCC testsuite nor ghostscript-6.52 nor Knuth's mmix.tar.gz
735 
   itself (core GCC functionality supposedly handling it) with sources
736 
   from 2002-06-06.  */
737 
 
738 
#define REVERSIBLE_CC_MODE(MODE)                \
739 
 mmix_reversible_cc_mode (MODE)
740 
 
741 
 
742 
/* Node: Costs */
743 
 
744 
/* The special registers can only move to and from general regs, and we
745 
   need to check that their constraints match, so say 3 for them.  */
746 
/* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2)
747 
   miscompiles reload1.c:reload_cse_simplify_set; a call to
748 
   reload_cse_regno_equal_p is missing when checking if a substitution of
749 
   a register setting is valid if this is defined to just the expression
750 
   in mmix_register_move_cost.
751 
 
752 
   Symptom: a (all?) register setting is optimized away for e.g.
753 
   "char *p1(char *p) { return p+1; }" and the value of register zero ($0)
754 
   is returned.
755 
 
756 
   We can workaround by making this a function call - unknown if this
757 
   causes dire speed effects.  */
758 
#define REGISTER_MOVE_COST(MODE, FROM, TO) \
759 
 mmix_register_move_cost (MODE, FROM, TO)
760 
 
761 
#define SLOW_BYTE_ACCESS 0
762 
 
763 
 
764 
/* Node: Sections */
765 
 
766 
/* This must be a constant string, since it's used in crtstuff.c.  */
767 
#define TEXT_SECTION_ASM_OP \
768 
 "\t.text ! mmixal:= 9H LOC 8B"
769 
 
770 
/* FIXME: Not documented.  */
771 
#define DATA_SECTION_ASM_OP \
772 
 mmix_data_section_asm_op ()
773 
 
774 
#define READONLY_DATA_SECTION_ASM_OP    "\t.section\t.rodata"
775 
 
776 
/* Node: PIC */
777 
/* (empty) */
778 
 
779 
 
780 
/* Node: File Framework */
781 
 
782 
/* While any other punctuation character but ";" would do, we prefer "%"
783 
   or "!"; "!" is an unary operator and so will not be mistakenly included
784 
   in correctly formed expressions.  The hash character adds mass; catches
785 
   the eye.  We can't have it as a comment char by itself, since it's a
786 
   hex-number prefix.  */
787 
#define ASM_COMMENT_START "!#"
788 
 
789 
/* These aren't currently functional.  We just keep them as markers.  */
790 
#define ASM_APP_ON "%APP\n"
791 
#define ASM_APP_OFF "%NO_APP\n"
792 
 
793 
#define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \
794 
 mmix_asm_output_source_filename (STREAM, NAME)
795 
 
796 
#define OUTPUT_QUOTED_STRING(STREAM, STRING) \
797 
 mmix_output_quoted_string (STREAM, STRING, strlen (STRING))
798 
 
799 
#define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
800 
 
801 
/* Node: Data Output */
802 
 
803 
#define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \
804 
 mmix_asm_output_ascii (STREAM, PTR, LEN)
805 
 
806 
/* Node: Uninitialized Data */
807 
 
808 
#define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \
809 
 mmix_asm_output_aligned_common (ST, N, S, A)
810 
 
811 
#define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \
812 
 mmix_asm_output_aligned_local (ST, N, S, A)
813 
 
814 
 
815 
/* Node: Label Output */
816 
 
817 
#define ASM_OUTPUT_LABEL(STREAM, NAME) \
818 
 mmix_asm_output_label (STREAM, NAME)
819 
 
820 
#define ASM_OUTPUT_INTERNAL_LABEL(STREAM, NAME) \
821 
 mmix_asm_output_internal_label (STREAM, NAME)
822 
 
823 
#define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \
824 
 mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME)
825 
 
826 
#define GLOBAL_ASM_OP "\t.global "
827 
 
828 
#define ASM_WEAKEN_LABEL(STREAM, NAME) \
829 
 mmix_asm_weaken_label (STREAM, NAME)
830 
 
831 
#define MAKE_DECL_ONE_ONLY(DECL) \
832 
 mmix_make_decl_one_only (DECL)
833 
 
834 
#define ASM_OUTPUT_LABELREF(STREAM, NAME) \
835 
 mmix_asm_output_labelref (STREAM, NAME)
836 
 
837 
/* We insert a ":" to disambiguate against user symbols like L5.  */
838 
#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
839 
 sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM))
840 
 
841 
/* Insert "::"; these are rarer than internal labels.  FIXME: Make sure no
842 
   ":" is seen in the object file; we don't really want that mmixal
843 
   feature visible there.  We don't want the default, which uses a dot;
844 
   that'd be incompatible with mmixal.  */
845 
#define ASM_PN_FORMAT "%s::%lu"
846 
 
847 
#define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \
848 
 mmix_asm_output_def (STREAM, NAME, VALUE)
849 
 
850 
/* Node: Macros for Initialization */
851 
/* We're compiling to ELF and linking to MMO; fundamental ELF features
852 
   that GCC depend on are there.  */
853 
 
854 
/* These must be constant strings, since they're used in crtstuff.c.  */
855 
#define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible"
856 
 
857 
#define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible"
858 
 
859 
#define OBJECT_FORMAT_ELF
860 
 
861 
 
862 
/* Node: Instruction Output */
863 
 
864 
/* The non-$ register names must be prefixed with ":", since they're
865 
   affected by PREFIX.  We provide the non-colon names as additional
866 
   names.  */
867 
#define REGISTER_NAMES                                                  \
868 
 {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",                       \
869 
  "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",                 \
870 
  "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",               \
871 
  "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31",               \
872 
  "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39",               \
873 
  "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47",               \
874 
  "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55",               \
875 
  "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63",               \
876 
  "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71",               \
877 
  "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79",               \
878 
  "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87",               \
879 
  "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95",               \
880 
  "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103",           \
881 
  "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111",       \
882 
  "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119",       \
883 
  "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127",       \
884 
  "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135",       \
885 
  "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143",       \
886 
  "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151",       \
887 
  "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159",       \
888 
  "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167",       \
889 
  "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175",       \
890 
  "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183",       \
891 
  "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191",       \
892 
  "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199",       \
893 
  "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207",       \
894 
  "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215",       \
895 
  "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223",       \
896 
  "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231",       \
897 
  "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239",       \
898 
  "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247",       \
899 
  "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255",       \
900 
  ":rD",  ":rE",  ":rH",  ":rJ",  ":rR",  "ap_!BAD!", ":rO"}
901 
 
902 
#define ADDITIONAL_REGISTER_NAMES                       \
903 
 {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257},  \
904 
  {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}, {"rO", MMIX_rO_REGNUM}}
905 
 
906 
#define PRINT_OPERAND(STREAM, X, CODE) \
907 
 mmix_print_operand (STREAM, X, CODE)
908 
 
909 
#define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
910 
 mmix_print_operand_punct_valid_p (CODE)
911 
 
912 
#define PRINT_OPERAND_ADDRESS(STREAM, X) \
913 
 mmix_print_operand_address (STREAM, X)
914 
 
915 
#define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
916 
 mmix_asm_output_reg_push (STREAM, REGNO)
917 
 
918 
#define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
919 
 mmix_asm_output_reg_pop (STREAM, REGNO)
920 
 
921 
 
922 
/* Node: Dispatch Tables */
923 
 
924 
/* We define both types, since SImode is the better, but DImode the only
925 
   possible for mmixal so that's the one actually used.  */
926 
#define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
927 
 mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL)
928 
 
929 
#define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
930 
 mmix_asm_output_addr_vec_elt (STREAM, VALUE)
931 
 
932 
 
933 
/* Node: Exception Region Output */
934 
/* (empty) */
935 
 
936 
/* Node: Alignment Output */
937 
 
938 
#define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
939 
 mmix_asm_output_skip (STREAM, NBYTES)
940 
 
941 
#define ASM_OUTPUT_ALIGN(STREAM, POWER) \
942 
 mmix_asm_output_align (STREAM, POWER)
943 
 
944 
 
945 
/* Node: All Debuggers */
946 
 
947 
#define DBX_REGISTER_NUMBER(REGNO) \
948 
 mmix_dbx_register_number (REGNO)
949 
 
950 
 
951 
/* Node: DBX Options */
952 
/* (empty) */
953 
/* Node: DBX Hooks */
954 
/* (empty) */
955 
/* Node: File Names and DBX */
956 
/* (empty) */
957 
 
958 
 
959 
/* Node: SDB and DWARF */
960 
#define DWARF2_DEBUGGING_INFO 1
961 
#define DWARF2_ASM_LINE_DEBUG_INFO 1
962 
 
963 
/* Node: Misc */
964 
 
965 
/* There's no way to get a PC-relative offset into tables for SImode, so
966 
   for the moment we have absolute entries in DImode.
967 
   When we're going ELF, these should be SImode and 1.  */
968 
#define CASE_VECTOR_MODE DImode
969 
#define CASE_VECTOR_PC_RELATIVE 0
970 
 
971 
#define WORD_REGISTER_OPERATIONS
972 
 
973 
/* We have a choice, which makes this yet another parameter to tweak.  The
974 
   gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent
975 
   than "unsigned int", and we have signed characters.  FIXME: measure.  */
976 
#define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND)
977 
 
978 
#define MOVE_MAX 8
979 
 
980 
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
981 
 
982 
/* ??? MMIX allows a choice of STORE_FLAG_VALUE.  Revisit later,
983 
   we don't have scc expanders yet.  */
984 
 
985 
#define Pmode DImode
986 
 
987 
#define FUNCTION_MODE QImode
988 
 
989 
#define NO_IMPLICIT_EXTERN_C
990 
 
991 
#define HANDLE_SYSV_PRAGMA 1
992 
 
993 
/* These are checked.  */
994 
#define DOLLARS_IN_IDENTIFIERS 0
995 
#define NO_DOLLAR_IN_LABEL
996 
#define NO_DOT_IN_LABEL
997 
 
998 
#endif /* GCC_MMIX_H */
999 
/*
1000 
 * Local variables:
1001 
 * eval: (c-set-style "gnu")
1002 
 * indent-tabs-mode: t
1003 
 * End:
1004 
 */

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