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1 282 jeremybenn 
/* Definitions of target machine for GNU compiler, for MMIX.
2 
   Copyright (C) 2000, 2001, 2002, 2004, 2005, 2007, 2008, 2009
3 
   Free Software Foundation, Inc.
4 
   Contributed by Hans-Peter Nilsson (hp@bitrange.com)
5 
 
6 
This file is part of GCC.
7 
 
8 
GCC is free software; you can redistribute it and/or modify
9 
it under the terms of the GNU General Public License as published by
10 
the Free Software Foundation; either version 3, or (at your option)
11 
any later version.
12 
 
13 
GCC is distributed in the hope that it will be useful,
14 
but WITHOUT ANY WARRANTY; without even the implied warranty of
15 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 
GNU General Public License for more details.
17 
 
18 
You should have received a copy of the GNU General Public License
19 
along with GCC; see the file COPYING3.  If not see
20 
<http://www.gnu.org/licenses/>.  */
21 
 
22 
#ifndef GCC_MMIX_H
23 
#define GCC_MMIX_H
24 
 
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
34 
 
35 
/* FIXME: This one isn't fully implemented yet.  Return values larger than
36 
   one register are passed by reference in MMIX_STRUCT_VALUE_REGNUM by the
37 
   caller, except for return values of type "complex".  */
38 
#define MMIX_MAX_REGS_FOR_VALUE 16
39 
#define MMIX_RETURN_VALUE_REGNUM \
40 
  (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 15)
41 
#define MMIX_OUTGOING_RETURN_VALUE_REGNUM \
42 
  (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 0)
43 
#define MMIX_STRUCT_VALUE_REGNUM 251
44 
#define MMIX_STATIC_CHAIN_REGNUM 252
45 
#define MMIX_FRAME_POINTER_REGNUM 253
46 
#define MMIX_STACK_POINTER_REGNUM 254
47 
#define MMIX_LAST_GENERAL_REGISTER 255
48 
#define MMIX_INCOMING_RETURN_ADDRESS_REGNUM MMIX_rJ_REGNUM
49 
#define MMIX_HIMULT_REGNUM 258
50 
#define MMIX_REMAINDER_REGNUM MMIX_rR_REGNUM
51 
#define MMIX_ARG_POINTER_REGNUM 261
52 
#define MMIX_rO_REGNUM 262
53 
#define MMIX_LAST_STACK_REGISTER_REGNUM 31
54 
 
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)
60 
 
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
65 
#endif
66 
 
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
69 
#endif
70 
 
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
74 
 
75 
#ifdef REG_OK_STRICT
76 
# define MMIX_REG_OK_STRICT 1
77 
#else
78 
# define MMIX_REG_OK_STRICT 0
79 
#endif
80 
 
81 
#define MMIX_FUNCTION_ARG_SIZE(MODE, TYPE) \
82 
 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) : int_size_in_bytes (TYPE))
83 
 
84 
/* Per-function machine data.  This is normally an opaque type just
85 
   defined and used in the tm.c file, but we need to see the definition in
86 
   mmix.md too.  */
87 
struct GTY(()) machine_function
88 
 {
89 
   int has_landing_pad;
90 
   int highest_saved_stack_register;
91 
   int in_prologue;
92 
 };
93 
 
94 
/* For these target macros, there is no generic documentation here.  You
95 
   should read `Using and Porting GCC' for that.  Only comments specific
96 
   to the MMIX target are here.
97 
 
98 
   There are however references to the specific texinfo node (comments
99 
   with "Node:"), so there should be little or nothing amiss.  Probably
100 
   the opposite, since we don't have to care about old littering and
101 
   soon outdated generic comments.  */
102 
 
103 
/* Node: Driver */
104 
 
105 
/* User symbols are in the same name-space as built-in symbols, but we
106 
   don't need the built-in symbols, so remove those and instead apply
107 
   stricter operand checking.  Don't warn when expanding insns.  */
108 
#define ASM_SPEC "-no-predefined-syms -x"
109 
 
110 
/* Pass on -mset-program-start=N and -mset-data-start=M to the linker.
111 
   Provide default program start 0x100 unless -mno-set-program-start.
112 
   Don't do this if linking relocatably, with -r.  For a final link,
113 
   produce mmo, unless ELF is requested or when linking relocatably.  */
114 
#define LINK_SPEC \
115 
 "%{mset-program-start=*:--defsym __.MMIX.start..text=%*}\
116 
  %{mset-data-start=*:--defsym __.MMIX.start..data=%*}\
117 
  %{!mset-program-start=*:\
118 
    %{!mno-set-program-start:\
119 
     %{!r:--defsym __.MMIX.start..text=0x100}}}\
120 
  %{!melf:%{!r:-m mmo}}%{melf|r:-m elf64mmix}"
121 
 
122 
/* FIXME: There's no provision for profiling here.  */
123 
#define STARTFILE_SPEC  \
124 
  "crti%O%s crtbegin%O%s"
125 
 
126 
#define ENDFILE_SPEC "crtend%O%s crtn%O%s"
127 
 
128 
/* Node: Run-time Target */
129 
 
130 
/* Define __LONG_MAX__, since we're advised not to change glimits.h.  */
131 
#define TARGET_CPU_CPP_BUILTINS()                               \
132 
  do                                                            \
133 
    {                                                           \
134 
      builtin_define ("__mmix__");                              \
135 
      builtin_define ("__MMIX__");                              \
136 
      if (TARGET_ABI_GNU)                                       \
137 
        builtin_define ("__MMIX_ABI_GNU__");                    \
138 
      else                                                      \
139 
        builtin_define ("__MMIX_ABI_MMIXWARE__");               \
140 
    }                                                           \
141 
  while (0)
142 
 
143 
extern int target_flags;
144 
 
145 
#define TARGET_DEFAULT \
146 
 (MASK_BRANCH_PREDICT | MASK_BASE_ADDRESSES | MASK_USE_RETURN_INSN)
147 
 
148 
/* Unfortunately, this must not reference anything in "mmix.c".  */
149 
#define TARGET_VERSION \
150 
  fprintf (stderr, " (MMIX)")
151 
 
152 
#define OVERRIDE_OPTIONS mmix_override_options ()
153 
 
154 
#define OPTIMIZATION_OPTIONS(LEVEL, SIZE)       \
155 
  do                                            \
156 
    {                                           \
157 
      if (LEVEL >= 1)                           \
158 
        flag_regmove = TRUE;                    \
159 
                                                \
160 
      if (SIZE || LEVEL > 1)                    \
161 
        {                                       \
162 
          flag_omit_frame_pointer = TRUE;       \
163 
        }                                       \
164 
    }                                           \
165 
  while (0)
166 
 
167 
/* This one will have to wait a little bit; right now we can't debug
168 
   neither with or without a frame-pointer.  */
169 
/* #define CAN_DEBUG_WITHOUT_FP */
170 
 
171 
 
172 
/* Node: Per-Function Data */
173 
#define INIT_EXPANDERS mmix_init_expanders ()
174 
 
175 
 
176 
/* Node: Storage Layout */
177 
/* I see no bit-field instructions.  Anyway, the common order is from low
178 
   to high, as the power of two, hence little-endian.  */
179 
#define BITS_BIG_ENDIAN 0
180 
#define BYTES_BIG_ENDIAN 1
181 
#define WORDS_BIG_ENDIAN 1
182 
#define FLOAT_WORDS_BIG_ENDIAN 1
183 
#define UNITS_PER_WORD 8
184 
 
185 
/* We need to align everything to 64 bits that can affect the alignment
186 
   of other types.  Since address N is interpreted in MMIX as (N modulo
187 
   access_size), we must align.  */
188 
#define PARM_BOUNDARY 64
189 
#define STACK_BOUNDARY 64
190 
#define FUNCTION_BOUNDARY 32
191 
#define BIGGEST_ALIGNMENT 64
192 
 
193 
/* This one is only used in the ADA front end.  */
194 
#define MINIMUM_ATOMIC_ALIGNMENT 8
195 
 
196 
/* Copied from elfos.h.  */
197 
#define MAX_OFILE_ALIGNMENT (32768 * 8)
198 
 
199 
#define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
200 
 mmix_data_alignment (TYPE, BASIC_ALIGN)
201 
 
202 
#define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
203 
 mmix_constant_alignment (CONSTANT, BASIC_ALIGN)
204 
 
205 
#define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \
206 
 mmix_local_alignment (TYPE, BASIC_ALIGN)
207 
 
208 
/* Following other ports, this seems to most commonly be the word-size,
209 
   so let's do that here too.  */
210 
#define EMPTY_FIELD_BOUNDARY 64
211 
 
212 
/* We chose to have this low solely for similarity with the alpha.  It has
213 
   nothing to do with passing the tests dg/c99-scope-2 and
214 
   execute/align-1.c.  Nothing.  Though the tests seem wrong.  Padding of
215 
   the structure is automatically added to get alignment when needed if we
216 
   set this to just byte-boundary.  */
217 
#define STRUCTURE_SIZE_BOUNDARY 8
218 
 
219 
/* The lower bits are ignored.  */
220 
#define STRICT_ALIGNMENT 1
221 
 
222 
 
223 
/* Node: Type Layout */
224 
 
225 
/* It might seem more natural to have 64-bit ints on a 64-bit machine,
226 
   but then an occasional MMIX programmer needs to know how to put a lot
227 
   of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather
228 
   than the "intuitive" char, short and int types.  */
229 
#define INT_TYPE_SIZE 32
230 
#define SHORT_TYPE_SIZE 16
231 
#define LONG_LONG_TYPE_SIZE 64
232 
 
233 
#define FLOAT_TYPE_SIZE 32
234 
#define DOUBLE_TYPE_SIZE 64
235 
#define LONG_DOUBLE_TYPE_SIZE 64
236 
 
237 
#define DEFAULT_SIGNED_CHAR 1
238 
 
239 
 
240 
/* Node: Register Basics */
241 
/* We tell GCC about all 256 general registers, and we also include
242 
   rD, rE, rH, rJ, rR and rO (in that order) so we can describe what insns
243 
   clobber them.  We use a faked register for the argument pointer.  It is
244 
   always eliminated towards the frame-pointer or the stack-pointer, never
245 
   output in assembly.  Any fixed register would do for this, like $255,
246 
   but future debugging is easier when using a separate register.  It
247 
   counts as a global register for pseudorandom reasons.  */
248 
#define FIRST_PSEUDO_REGISTER 263
249 
 
250 
/* We treat general registers with no assigned purpose as fixed.  The
251 
   stack pointer, $254, is also fixed.  Register $255 is referred to as a
252 
   temporary register in the MMIX papers, and used as such in mmixal, so
253 
   it should not be used as a stack pointer.  We set it to fixed, and use
254 
   it "manually" at times of despair.  */
255 
#define FIXED_REGISTERS \
256 
 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
257 
   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
258 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
259 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
260 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
261 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
262 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
263 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
264 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
265 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
266 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
267 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
268 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
269 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
270 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
271 
   1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, \
272 
   1, 1, 0, 0, 0, 1, 1 \
273 
 }
274 
 
275 
/* General registers are fixed and therefore "historically" marked
276 
   call-used.  (FIXME: This has changed).  Registers $15..$31 are
277 
   call-clobbered; we'll put arguments in $16 and up, and we need $15 for
278 
   the MMIX register-stack "hole".  */
279 
#define CALL_USED_REGISTERS \
280 
 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
293 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
294 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
295 
   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, \
296 
   1, 1, 1, 1, 1, 1, 1 \
297 
 }
298 
 
299 
#define CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage ()
300 
 
301 
#define INCOMING_REGNO(OUT) mmix_opposite_regno (OUT, 0)
302 
 
303 
#define OUTGOING_REGNO(IN) mmix_opposite_regno (IN, 1)
304 
 
305 
/* Defining LOCAL_REGNO is necessary in presence of prologue/epilogue,
306 
   else GCC will be confused that those registers aren't saved and
307 
   restored.  */
308 
#define LOCAL_REGNO(REGNO) mmix_local_regno (REGNO)
309 
 
310 
/* Node: Allocation Order */
311 
 
312 
/* We should allocate registers from 0 to 31 by increasing number, because
313 
   I think that's what people expect.  Beyond that, just use
314 
   call-clobbered global registers first, then call-clobbered special
315 
   registers.  Last, the fixed registers.  */
316 
#define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER       \
317 
 { 0, 1, 2, 3, 4, 5, 6, 7,                       \
318 
   8, 9, 10, 11, 12, 13, 14, 15,                \
319 
   16, 17, 18, 19, 20, 21, 22, 23,              \
320 
   24, 25, 26, 27, 28, 29, 30, 31,              \
321 
                                                \
322 
   252, 251, 250, 249, 248, 247,                \
323 
                                                \
324 
   253,                                         \
325 
                                                \
326 
   258, 260, 259,                               \
327 
                                                \
328 
   32, 33, 34, 35, 36, 37, 38, 39,              \
329 
   40, 41, 42, 43, 44, 45, 46, 47,              \
330 
   48, 49, 50, 51, 52, 53, 54, 55,              \
331 
   56, 57, 58, 59, 60, 61, 62, 63,              \
332 
   64, 65, 66, 67, 68, 69, 70, 71,              \
333 
   72, 73, 74, 75, 76, 77, 78, 79,              \
334 
   80, 81, 82, 83, 84, 85, 86, 87,              \
335 
   88, 89, 90, 91, 92, 93, 94, 95,              \
336 
   96, 97, 98, 99, 100, 101, 102, 103,          \
337 
   104, 105, 106, 107, 108, 109, 110, 111,      \
338 
   112, 113, 114, 115, 116, 117, 118, 119,      \
339 
   120, 121, 122, 123, 124, 125, 126, 127,      \
340 
   128, 129, 130, 131, 132, 133, 134, 135,      \
341 
   136, 137, 138, 139, 140, 141, 142, 143,      \
342 
   144, 145, 146, 147, 148, 149, 150, 151,      \
343 
   152, 153, 154, 155, 156, 157, 158, 159,      \
344 
   160, 161, 162, 163, 164, 165, 166, 167,      \
345 
   168, 169, 170, 171, 172, 173, 174, 175,      \
346 
   176, 177, 178, 179, 180, 181, 182, 183,      \
347 
   184, 185, 186, 187, 188, 189, 190, 191,      \
348 
   192, 193, 194, 195, 196, 197, 198, 199,      \
349 
   200, 201, 202, 203, 204, 205, 206, 207,      \
350 
   208, 209, 210, 211, 212, 213, 214, 215,      \
351 
   216, 217, 218, 219, 220, 221, 222, 223,      \
352 
   224, 225, 226, 227, 228, 229, 230, 231,      \
353 
   232, 233, 234, 235, 236, 237, 238, 239,      \
354 
   240, 241, 242, 243, 244, 245, 246,           \
355 
                                                \
356 
   254, 255, 256, 257, 261, 262                 \
357 
 }
358 
 
359 
/* As a convenience, we put this nearby, for ease of comparison.
360 
   First, call-clobbered registers in reverse order of assignment as
361 
   parameters (also the top ones; not because they're parameters, but
362 
   for continuity).
363 
 
364 
   Second, saved registers that go on the register-stack.
365 
 
366 
   Third, special registers rH, rR and rJ.  They should not normally be
367 
   allocated, but since they're call-clobbered, it is cheaper to use one
368 
   of them than using a call-saved register for a call-clobbered use,
369 
   assuming it is referenced a very limited number of times.  Other global
370 
   and fixed registers come next; they are never allocated.  */
371 
#define MMIX_GNU_ABI_REG_ALLOC_ORDER            \
372 
 { 252, 251, 250, 249, 248, 247, 246,           \
373 
   245, 244, 243, 242, 241, 240, 239, 238,      \
374 
   237, 236, 235, 234, 233, 232, 231,           \
375 
                                                \
376 
   0, 1, 2, 3, 4, 5, 6, 7,                       \
377 
   8, 9, 10, 11, 12, 13, 14, 15,                \
378 
   16, 17, 18, 19, 20, 21, 22, 23,              \
379 
   24, 25, 26, 27, 28, 29, 30, 31,              \
380 
                                                \
381 
   253,                                         \
382 
                                                \
383 
   258, 260, 259,                               \
384 
                                                \
385 
   32, 33, 34, 35, 36, 37, 38, 39,              \
386 
   40, 41, 42, 43, 44, 45, 46, 47,              \
387 
   48, 49, 50, 51, 52, 53, 54, 55,              \
388 
   56, 57, 58, 59, 60, 61, 62, 63,              \
389 
   64, 65, 66, 67, 68, 69, 70, 71,              \
390 
   72, 73, 74, 75, 76, 77, 78, 79,              \
391 
   80, 81, 82, 83, 84, 85, 86, 87,              \
392 
   88, 89, 90, 91, 92, 93, 94, 95,              \
393 
   96, 97, 98, 99, 100, 101, 102, 103,          \
394 
   104, 105, 106, 107, 108, 109, 110, 111,      \
395 
   112, 113, 114, 115, 116, 117, 118, 119,      \
396 
   120, 121, 122, 123, 124, 125, 126, 127,      \
397 
   128, 129, 130, 131, 132, 133, 134, 135,      \
398 
   136, 137, 138, 139, 140, 141, 142, 143,      \
399 
   144, 145, 146, 147, 148, 149, 150, 151,      \
400 
   152, 153, 154, 155, 156, 157, 158, 159,      \
401 
   160, 161, 162, 163, 164, 165, 166, 167,      \
402 
   168, 169, 170, 171, 172, 173, 174, 175,      \
403 
   176, 177, 178, 179, 180, 181, 182, 183,      \
404 
   184, 185, 186, 187, 188, 189, 190, 191,      \
405 
   192, 193, 194, 195, 196, 197, 198, 199,      \
406 
   200, 201, 202, 203, 204, 205, 206, 207,      \
407 
   208, 209, 210, 211, 212, 213, 214, 215,      \
408 
   216, 217, 218, 219, 220, 221, 222, 223,      \
409 
   224, 225, 226, 227, 228, 229, 230,           \
410 
                                                \
411 
   254, 255, 256, 257, 261, 262                 \
412 
 }
413 
 
414 
/* The default one.  */
415 
#define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER
416 
 
417 
/* Node: Values in Registers */
418 
 
419 
#define HARD_REGNO_NREGS(REGNO, MODE)                   \
420 
   ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1)         \
421 
    / UNITS_PER_WORD)
422 
 
423 
#define HARD_REGNO_MODE_OK(REGNO, MODE) 1
424 
 
425 
/* Note that no register can really be accessed in single-float mode, so
426 
   we *can* say 1 here.  FIXME:  Will TRT happen for single-float, or do
427 
   we have to punt to libgcc1.asm?  */
428 
#define MODES_TIEABLE_P(MODE1, MODE2) 1
429 
 
430 
 
431 
/* Node: Leaf Functions */
432 
/* (empty) */
433 
 
434 
 
435 
/* Node: Register Classes */
436 
 
437 
enum reg_class
438 
 {
439 
   NO_REGS, GENERAL_REGS, REMAINDER_REG, HIMULT_REG,
440 
   SYSTEM_REGS, ALL_REGS, LIM_REG_CLASSES
441 
 };
442 
 
443 
#define N_REG_CLASSES (int) LIM_REG_CLASSES
444 
 
445 
#define REG_CLASS_NAMES                                         \
446 
 {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG",     \
447 
  "SYSTEM_REGS", "ALL_REGS"}
448 
 
449 
/* Note that the contents of each item is always 32 bits.  */
450 
#define REG_CLASS_CONTENTS                      \
451 
 {{0, 0, 0, 0, 0, 0, 0, 0, 0},                   \
452 
  {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20},       \
453 
  {0, 0, 0, 0, 0, 0, 0, 0, 0x10},               \
454 
  {0, 0, 0, 0, 0, 0, 0, 0, 4},                  \
455 
  {0, 0, 0, 0, 0, 0, 0, 0, 0x7f},               \
456 
  {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x7f}}
457 
 
458 
#define REGNO_REG_CLASS(REGNO)                                  \
459 
 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER                         \
460 
  || (REGNO) == MMIX_ARG_POINTER_REGNUM                         \
461 
  ? GENERAL_REGS                                                \
462 
  : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG            \
463 
  : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS)
464 
 
465 
#define BASE_REG_CLASS GENERAL_REGS
466 
 
467 
#define INDEX_REG_CLASS GENERAL_REGS
468 
 
469 
#define REG_CLASS_FROM_LETTER(CHAR)             \
470 
 ((CHAR) == 'x' ? SYSTEM_REGS                   \
471 
  : (CHAR) == 'y' ? REMAINDER_REG               \
472 
  : (CHAR) == 'z' ? HIMULT_REG : NO_REGS)
473 
 
474 
#define REGNO_OK_FOR_BASE_P(REGNO)                              \
475 
 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER                         \
476 
  || (REGNO) == MMIX_ARG_POINTER_REGNUM                         \
477 
  || (reg_renumber[REGNO] > 0                                    \
478 
      && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER))
479 
 
480 
#define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO)
481 
 
482 
#define PREFERRED_RELOAD_CLASS(X, CLASS) \
483 
 mmix_preferred_reload_class (X, CLASS)
484 
 
485 
#define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \
486 
 mmix_preferred_output_reload_class (X, CLASS)
487 
 
488 
#define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
489 
 mmix_secondary_reload_class (CLASS, MODE, X, 1)
490 
 
491 
#define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
492 
 mmix_secondary_reload_class (CLASS, MODE, X, 0)
493 
 
494 
#define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE)
495 
 
496 
#define CONST_OK_FOR_LETTER_P(VALUE, C) \
497 
 mmix_const_ok_for_letter_p (VALUE, C)
498 
 
499 
#define EXTRA_CONSTRAINT(VALUE, C)      \
500 
 mmix_extra_constraint (VALUE, C, MMIX_REG_OK_STRICT)
501 
 
502 
/* Do we need anything serious here?  Yes, any FLOT constant.  */
503 
#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)                  \
504 
 mmix_const_double_ok_for_letter_p (VALUE, C)
505 
 
506 
 
507 
/* Node: Frame Layout */
508 
 
509 
#define STACK_GROWS_DOWNWARD
510 
#define FRAME_GROWS_DOWNWARD 1
511 
 
512 
#define STARTING_FRAME_OFFSET \
513 
  mmix_starting_frame_offset ()
514 
 
515 
#define FIRST_PARM_OFFSET(FUNDECL) 0
516 
 
517 
#define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \
518 
 mmix_dynamic_chain_address (FRAMEADDR)
519 
 
520 
/* FIXME: It seems RETURN_ADDR_OFFSET is undocumented.  */
521 
 
522 
#define SETUP_FRAME_ADDRESSES() \
523 
 mmix_setup_frame_addresses ()
524 
 
525 
#define RETURN_ADDR_RTX(COUNT, FRAME)           \
526 
 mmix_return_addr_rtx (COUNT, FRAME)
527 
 
528 
/* It's in rJ before we store it somewhere.  */
529 
#define INCOMING_RETURN_ADDR_RTX \
530 
 gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
531 
 
532 
/* FIXME: This does not seem properly documented or cross-indexed.
533 
   Nowhere except in the code does it say it *has* to be in the range
534 
   0..255, or else it will be truncated.  That goes for the default too.  */
535 
#define DWARF_FRAME_RETURN_COLUMN \
536 
 DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
537 
 
538 
/* No return address is stored there.  */
539 
#define INCOMING_FRAME_SP_OFFSET 0
540 
 
541 
/* Node: Stack Checking */
542 
/* (empty) */
543 
 
544 
 
545 
/* Node: Exception Handling */
546 
 
547 
#define EH_RETURN_DATA_REGNO(N) \
548 
 mmix_eh_return_data_regno (N)
549 
 
550 
#define EH_RETURN_STACKADJ_RTX \
551 
 mmix_eh_return_stackadj_rtx ()
552 
 
553 
#define EH_RETURN_HANDLER_RTX \
554 
 mmix_eh_return_handler_rtx ()
555 
 
556 
#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \
557 
 mmix_asm_preferred_eh_data_format (CODE, GLOBAL)
558 
 
559 
/* Node: Frame Registers */
560 
#define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM
561 
 
562 
/* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on
563 
   what register we want to use.  */
564 
#define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM
565 
#define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM
566 
 
567 
#define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM
568 
 
569 
 
570 
/* Node: Elimination */
571 
 
572 
/* The frame-pointer is stored in a location that either counts to the
573 
   offset of incoming parameters, or that counts to the offset of the
574 
   frame, so we can't use a single offset.  We therefore eliminate those
575 
   two separately.  */
576 
#define ELIMINABLE_REGS                         \
577 
 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM},   \
578 
  {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},   \
579 
  {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
580 
 
581 
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
582 
 (OFFSET) = mmix_initial_elimination_offset (FROM, TO)
583 
 
584 
 
585 
/* Node: Stack Arguments */
586 
 
587 
#define ACCUMULATE_OUTGOING_ARGS 1
588 
 
589 
#define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0
590 
 
591 
 
592 
/* Node: Register Arguments */
593 
#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED)    \
594 
 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 0)
595 
 
596 
#define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED)   \
597 
 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 1)
598 
 
599 
typedef struct { int regs; int lib; } CUMULATIVE_ARGS;
600 
 
601 
#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
602 
 ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0))
603 
 
604 
#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED)            \
605 
 ((CUM).regs                                                    \
606 
  = ((targetm.calls.must_pass_in_stack (MODE, TYPE))            \
607 
     || (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE) > 8                \
608 
         && !TARGET_LIBFUNC && !(CUM).lib))                     \
609 
  ? (MMIX_MAX_ARGS_IN_REGS) + 1                                 \
610 
  : (CUM).regs + (7 + (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE))) / 8)
611 
 
612 
#define FUNCTION_ARG_REGNO_P(REGNO)             \
613 
 mmix_function_arg_regno_p (REGNO, 0)
614 
 
615 
 
616 
/* Node: Register Arguments */
617 
 
618 
#define FUNCTION_VALUE(VALTYPE, FUNC)  \
619 
 gen_rtx_REG (TYPE_MODE (VALTYPE), MMIX_RETURN_VALUE_REGNUM)
620 
 
621 
/* This needs to take care of the register hole for complex return values.  */
622 
#define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC)  \
623 
 mmix_function_outgoing_value (VALTYPE, FUNC)
624 
 
625 
#define LIBCALL_VALUE(MODE) \
626 
 gen_rtx_REG (MODE, MMIX_RETURN_VALUE_REGNUM)
627 
 
628 
#define FUNCTION_VALUE_REGNO_P(REGNO) \
629 
 mmix_function_value_regno_p (REGNO)
630 
 
631 
 
632 
/* Node: Caller Saves */
633 
/* (empty) */
634 
 
635 
 
636 
/* Node: Function Entry */
637 
 
638 
/* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and
639 
   TARGET_ASM_FUNCTION_EPILOGUE.  */
640 
 
641 
/* We need to say that the epilogue uses the return address, so the
642 
   initial-value machinery restores it.  FIXME: Some targets
643 
   conditionalize on "reload_completed &&".  Investigate difference.
644 
   FIXME: Not needed if nonlocal_goto_stack_level.  */
645 
#define EPILOGUE_USES(REGNO) \
646 
 ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM)
647 
 
648 
/* Node: Profiling */
649 
#define FUNCTION_PROFILER(FILE, LABELNO)        \
650 
 mmix_function_profiler (FILE, LABELNO)
651 
 
652 
/* Node: Trampolines */
653 
 
654 
#define TRAMPOLINE_SIZE         (4*UNITS_PER_WORD)
655 
#define TRAMPOLINE_ALIGNMENT    BITS_PER_WORD
656 
 
657 
/* Node: Addressing Modes */
658 
 
659 
#define CONSTANT_ADDRESS_P(X) \
660 
 mmix_constant_address_p (X)
661 
 
662 
#define MAX_REGS_PER_ADDRESS 2
663 
 
664 
#ifndef REG_OK_STRICT
665 
# define REG_OK_FOR_BASE_P(X)                   \
666 
  (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER      \
667 
   || REGNO (X) == MMIX_ARG_POINTER_REGNUM      \
668 
   || REGNO (X) >= FIRST_PSEUDO_REGISTER)
669 
#else
670 
# define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
671 
#endif /* REG_OK_STRICT */
672 
 
673 
#define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
674 
 
675 
#define LEGITIMATE_CONSTANT_P(X) \
676 
 mmix_legitimate_constant_p (X)
677 
 
678 
 
679 
/* Node: Condition Code */
680 
 
681 
#define SELECT_CC_MODE(OP, X, Y)                \
682 
 mmix_select_cc_mode (OP, X, Y)
683 
 
684 
/* A definition of CANONICALIZE_COMPARISON that changed LE and GT
685 
   comparisons with -1 to LT and GE respectively, and LT, LTU, GE or GEU
686 
   comparisons with 256 to 255 and LE, LEU, GT and GTU has been
687 
   ineffective; the code path for performing the changes did not trig for
688 
   neither the GCC testsuite nor ghostscript-6.52 nor Knuth's mmix.tar.gz
689 
   itself (core GCC functionality supposedly handling it) with sources
690 
   from 2002-06-06.  */
691 
 
692 
#define REVERSIBLE_CC_MODE(MODE)                \
693 
 mmix_reversible_cc_mode (MODE)
694 
 
695 
 
696 
/* Node: Costs */
697 
 
698 
/* The special registers can only move to and from general regs, and we
699 
   need to check that their constraints match, so say 3 for them.  */
700 
/* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2)
701 
   miscompiles reload1.c:reload_cse_simplify_set; a call to
702 
   reload_cse_regno_equal_p is missing when checking if a substitution of
703 
   a register setting is valid if this is defined to just the expression
704 
   in mmix_register_move_cost.
705 
 
706 
   Symptom: a (all?) register setting is optimized away for e.g.
707 
   "char *p1(char *p) { return p+1; }" and the value of register zero ($0)
708 
   is returned.
709 
 
710 
   We can workaround by making this a function call - unknown if this
711 
   causes dire speed effects.  */
712 
#define REGISTER_MOVE_COST(MODE, FROM, TO) \
713 
 mmix_register_move_cost (MODE, FROM, TO)
714 
 
715 
#define SLOW_BYTE_ACCESS 0
716 
 
717 
 
718 
/* Node: Sections */
719 
 
720 
/* This must be a constant string, since it's used in crtstuff.c.  */
721 
#define TEXT_SECTION_ASM_OP \
722 
 "\t.text ! mmixal:= 9H LOC 8B"
723 
 
724 
/* FIXME: Not documented.  */
725 
#define DATA_SECTION_ASM_OP \
726 
 mmix_data_section_asm_op ()
727 
 
728 
#define READONLY_DATA_SECTION_ASM_OP    "\t.section\t.rodata"
729 
 
730 
/* Node: PIC */
731 
/* (empty) */
732 
 
733 
 
734 
/* Node: File Framework */
735 
 
736 
/* While any other punctuation character but ";" would do, we prefer "%"
737 
   or "!"; "!" is an unary operator and so will not be mistakenly included
738 
   in correctly formed expressions.  The hash character adds mass; catches
739 
   the eye.  We can't have it as a comment char by itself, since it's a
740 
   hex-number prefix.  */
741 
#define ASM_COMMENT_START "!#"
742 
 
743 
/* These aren't currently functional.  We just keep them as markers.  */
744 
#define ASM_APP_ON "%APP\n"
745 
#define ASM_APP_OFF "%NO_APP\n"
746 
 
747 
#define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \
748 
 mmix_asm_output_source_filename (STREAM, NAME)
749 
 
750 
#define OUTPUT_QUOTED_STRING(STREAM, STRING) \
751 
 mmix_output_quoted_string (STREAM, STRING, strlen (STRING))
752 
 
753 
#define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
754 
 
755 
/* Node: Data Output */
756 
 
757 
#define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \
758 
 mmix_asm_output_ascii (STREAM, PTR, LEN)
759 
 
760 
/* Node: Uninitialized Data */
761 
 
762 
#define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \
763 
 mmix_asm_output_aligned_common (ST, N, S, A)
764 
 
765 
#define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \
766 
 mmix_asm_output_aligned_local (ST, N, S, A)
767 
 
768 
 
769 
/* Node: Label Output */
770 
 
771 
#define ASM_OUTPUT_LABEL(STREAM, NAME) \
772 
 mmix_asm_output_label (STREAM, NAME)
773 
 
774 
#define ASM_OUTPUT_INTERNAL_LABEL(STREAM, NAME) \
775 
 mmix_asm_output_internal_label (STREAM, NAME)
776 
 
777 
#define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \
778 
 mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME)
779 
 
780 
#define GLOBAL_ASM_OP "\t.global "
781 
 
782 
#define ASM_WEAKEN_LABEL(STREAM, NAME) \
783 
 mmix_asm_weaken_label (STREAM, NAME)
784 
 
785 
#define MAKE_DECL_ONE_ONLY(DECL) \
786 
 mmix_make_decl_one_only (DECL)
787 
 
788 
#define ASM_OUTPUT_LABELREF(STREAM, NAME) \
789 
 mmix_asm_output_labelref (STREAM, NAME)
790 
 
791 
/* We insert a ":" to disambiguate against user symbols like L5.  */
792 
#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
793 
 sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM))
794 
 
795 
/* Insert "::"; these are rarer than internal labels.  FIXME: Make sure no
796 
   ":" is seen in the object file; we don't really want that mmixal
797 
   feature visible there.  We don't want the default, which uses a dot;
798 
   that'd be incompatible with mmixal.  */
799 
#define ASM_PN_FORMAT "%s::%lu"
800 
 
801 
#define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \
802 
 mmix_asm_output_def (STREAM, NAME, VALUE)
803 
 
804 
/* Node: Macros for Initialization */
805 
/* We're compiling to ELF and linking to MMO; fundamental ELF features
806 
   that GCC depend on are there.  */
807 
 
808 
/* These must be constant strings, since they're used in crtstuff.c.  */
809 
#define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible"
810 
 
811 
#define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible"
812 
 
813 
#define OBJECT_FORMAT_ELF
814 
 
815 
 
816 
/* Node: Instruction Output */
817 
 
818 
/* The non-$ register names must be prefixed with ":", since they're
819 
   affected by PREFIX.  We provide the non-colon names as additional
820 
   names.  */
821 
#define REGISTER_NAMES                                                  \
822 
 {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7",                       \
823 
  "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15",                 \
824 
  "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23",               \
825 
  "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31",               \
826 
  "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39",               \
827 
  "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47",               \
828 
  "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55",               \
829 
  "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63",               \
830 
  "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71",               \
831 
  "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79",               \
832 
  "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87",               \
833 
  "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95",               \
834 
  "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103",           \
835 
  "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111",       \
836 
  "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119",       \
837 
  "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127",       \
838 
  "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135",       \
839 
  "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143",       \
840 
  "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151",       \
841 
  "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159",       \
842 
  "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167",       \
843 
  "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175",       \
844 
  "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183",       \
845 
  "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191",       \
846 
  "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199",       \
847 
  "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207",       \
848 
  "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215",       \
849 
  "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223",       \
850 
  "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231",       \
851 
  "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239",       \
852 
  "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247",       \
853 
  "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255",       \
854 
  ":rD",  ":rE",  ":rH",  ":rJ",  ":rR",  "ap_!BAD!", ":rO"}
855 
 
856 
#define ADDITIONAL_REGISTER_NAMES                       \
857 
 {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257},  \
858 
  {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}, {"rO", MMIX_rO_REGNUM}}
859 
 
860 
#define PRINT_OPERAND(STREAM, X, CODE) \
861 
 mmix_print_operand (STREAM, X, CODE)
862 
 
863 
#define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
864 
 mmix_print_operand_punct_valid_p (CODE)
865 
 
866 
#define PRINT_OPERAND_ADDRESS(STREAM, X) \
867 
 mmix_print_operand_address (STREAM, X)
868 
 
869 
#define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
870 
 mmix_asm_output_reg_push (STREAM, REGNO)
871 
 
872 
#define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
873 
 mmix_asm_output_reg_pop (STREAM, REGNO)
874 
 
875 
 
876 
/* Node: Dispatch Tables */
877 
 
878 
/* We define both types, since SImode is the better, but DImode the only
879 
   possible for mmixal so that's the one actually used.  */
880 
#define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
881 
 mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL)
882 
 
883 
#define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
884 
 mmix_asm_output_addr_vec_elt (STREAM, VALUE)
885 
 
886 
 
887 
/* Node: Exception Region Output */
888 
/* (empty) */
889 
 
890 
/* Node: Alignment Output */
891 
 
892 
#define ASM_OUTPUT_SKIP(STREAM, NBYTES) \
893 
 mmix_asm_output_skip (STREAM, NBYTES)
894 
 
895 
#define ASM_OUTPUT_ALIGN(STREAM, POWER) \
896 
 mmix_asm_output_align (STREAM, POWER)
897 
 
898 
 
899 
/* Node: All Debuggers */
900 
 
901 
#define DBX_REGISTER_NUMBER(REGNO) \
902 
 mmix_dbx_register_number (REGNO)
903 
 
904 
 
905 
/* Node: DBX Options */
906 
/* (empty) */
907 
/* Node: DBX Hooks */
908 
/* (empty) */
909 
/* Node: File Names and DBX */
910 
/* (empty) */
911 
 
912 
 
913 
/* Node: SDB and DWARF */
914 
#define DWARF2_DEBUGGING_INFO 1
915 
#define DWARF2_ASM_LINE_DEBUG_INFO 1
916 
 
917 
/* Node: Misc */
918 
 
919 
/* There's no way to get a PC-relative offset into tables for SImode, so
920 
   for the moment we have absolute entries in DImode.
921 
   When we're going ELF, these should be SImode and 1.  */
922 
#define CASE_VECTOR_MODE DImode
923 
#define CASE_VECTOR_PC_RELATIVE 0
924 
 
925 
#define WORD_REGISTER_OPERATIONS
926 
 
927 
/* We have a choice, which makes this yet another parameter to tweak.  The
928 
   gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent
929 
   than "unsigned int", and we have signed characters.  FIXME: measure.  */
930 
#define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND)
931 
 
932 
#define MOVE_MAX 8
933 
 
934 
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
935 
 
936 
/* ??? MMIX allows a choice of STORE_FLAG_VALUE.  Revisit later,
937 
   we don't have scc expanders yet.  */
938 
 
939 
#define Pmode DImode
940 
 
941 
#define FUNCTION_MODE QImode
942 
 
943 
#define NO_IMPLICIT_EXTERN_C
944 
 
945 
#define HANDLE_SYSV_PRAGMA 1
946 
 
947 
/* These are checked.  */
948 
#define DOLLARS_IN_IDENTIFIERS 0
949 
#define NO_DOLLAR_IN_LABEL
950 
#define NO_DOT_IN_LABEL
951 
 
952 
#endif /* GCC_MMIX_H */
953 
/*
954 
 * Local variables:
955 
 * eval: (c-set-style "gnu")
956 
 * indent-tabs-mode: t
957 
 * End:
958 
 */

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