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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [config/] [score/] [score.c] - Blame information for rev 859

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Line No. Rev Author Line
1 282 jeremybenn 
/* Output routines for Sunplus S+CORE processor
2 
   Copyright (C) 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
3 
   Contributed by Sunnorth.
4 
 
5 
   This file is part of GCC.
6 
 
7 
   GCC is free software; you can redistribute it and/or modify it
8 
   under the terms of the GNU General Public License as published
9 
   by the Free Software Foundation; either version 3, or (at your
10 
   option) any later version.
11 
 
12 
   GCC is distributed in the hope that it will be useful, but WITHOUT
13 
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 
   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
15 
   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 
#include "config.h"
22 
#include "system.h"
23 
#include "coretypes.h"
24 
#include "tm.h"
25 
#include "rtl.h"
26 
#include "regs.h"
27 
#include "hard-reg-set.h"
28 
#include "real.h"
29 
#include "insn-config.h"
30 
#include "conditions.h"
31 
#include "insn-attr.h"
32 
#include "recog.h"
33 
#include "toplev.h"
34 
#include "output.h"
35 
#include "tree.h"
36 
#include "function.h"
37 
#include "expr.h"
38 
#include "optabs.h"
39 
#include "flags.h"
40 
#include "reload.h"
41 
#include "tm_p.h"
42 
#include "ggc.h"
43 
#include "gstab.h"
44 
#include "hashtab.h"
45 
#include "debug.h"
46 
#include "target.h"
47 
#include "target-def.h"
48 
#include "integrate.h"
49 
#include "langhooks.h"
50 
#include "score7.h"
51 
#include "score3.h"
52 
#include "df.h"
53 
 
54 
#undef  TARGET_ASM_FILE_START
55 
#define TARGET_ASM_FILE_START           score_asm_file_start
56 
 
57 
#undef  TARGET_ASM_FILE_END
58 
#define TARGET_ASM_FILE_END             score_asm_file_end
59 
 
60 
#undef  TARGET_ASM_FUNCTION_PROLOGUE
61 
#define TARGET_ASM_FUNCTION_PROLOGUE    score_function_prologue
62 
 
63 
#undef  TARGET_ASM_FUNCTION_EPILOGUE
64 
#define TARGET_ASM_FUNCTION_EPILOGUE    score_function_epilogue
65 
 
66 
#undef TARGET_DEFAULT_TARGET_FLAGS
67 
#define TARGET_DEFAULT_TARGET_FLAGS     TARGET_DEFAULT
68 
#undef TARGET_HANDLE_OPTION
69 
#define TARGET_HANDLE_OPTION            score_handle_option
70 
 
71 
#undef TARGET_LEGITIMIZE_ADDRESS
72 
#define TARGET_LEGITIMIZE_ADDRESS       score_legitimize_address
73 
 
74 
#undef  TARGET_SCHED_ISSUE_RATE
75 
#define TARGET_SCHED_ISSUE_RATE         score_issue_rate
76 
 
77 
#undef TARGET_ASM_SELECT_RTX_SECTION
78 
#define TARGET_ASM_SELECT_RTX_SECTION   score_select_rtx_section
79 
 
80 
#undef  TARGET_IN_SMALL_DATA_P
81 
#define TARGET_IN_SMALL_DATA_P          score_in_small_data_p
82 
 
83 
#undef  TARGET_FUNCTION_OK_FOR_SIBCALL
84 
#define TARGET_FUNCTION_OK_FOR_SIBCALL  score_function_ok_for_sibcall
85 
 
86 
#undef TARGET_STRICT_ARGUMENT_NAMING
87 
#define TARGET_STRICT_ARGUMENT_NAMING   hook_bool_CUMULATIVE_ARGS_true
88 
 
89 
#undef TARGET_ASM_OUTPUT_MI_THUNK
90 
#define TARGET_ASM_OUTPUT_MI_THUNK      score_output_mi_thunk
91 
 
92 
#undef TARGET_PROMOTE_FUNCTION_MODE
93 
#define TARGET_PROMOTE_FUNCTION_MODE    default_promote_function_mode_always_promote
94 
 
95 
#undef TARGET_PROMOTE_PROTOTYPES
96 
#define TARGET_PROMOTE_PROTOTYPES       hook_bool_tree_true
97 
 
98 
#undef TARGET_MUST_PASS_IN_STACK
99 
#define TARGET_MUST_PASS_IN_STACK       must_pass_in_stack_var_size
100 
 
101 
#undef TARGET_ARG_PARTIAL_BYTES
102 
#define TARGET_ARG_PARTIAL_BYTES        score_arg_partial_bytes
103 
 
104 
#undef TARGET_PASS_BY_REFERENCE
105 
#define TARGET_PASS_BY_REFERENCE        score_pass_by_reference
106 
 
107 
#undef TARGET_RETURN_IN_MEMORY
108 
#define TARGET_RETURN_IN_MEMORY         score_return_in_memory
109 
 
110 
#undef TARGET_RTX_COSTS
111 
#define TARGET_RTX_COSTS                score_rtx_costs
112 
 
113 
#undef TARGET_ADDRESS_COST
114 
#define TARGET_ADDRESS_COST             score_address_cost
115 
 
116 
#undef TARGET_LEGITIMATE_ADDRESS_P
117 
#define TARGET_LEGITIMATE_ADDRESS_P     score_legitimate_address_p
118 
 
119 
#undef TARGET_CAN_ELIMINATE
120 
#define TARGET_CAN_ELIMINATE            score_can_eliminate
121 
 
122 
#undef TARGET_ASM_TRAMPOLINE_TEMPLATE
123 
#define TARGET_ASM_TRAMPOLINE_TEMPLATE  score_asm_trampoline_template
124 
#undef TARGET_TRAMPOLINE_INIT
125 
#define TARGET_TRAMPOLINE_INIT          score_trampoline_init
126 
 
127 
struct extern_list *extern_head = 0;
128 
 
129 
/* default 0 = NO_REGS  */
130 
enum reg_class score_char_to_class[256];
131 
 
132 
/* Implement TARGET_RETURN_IN_MEMORY.  In S+core,
133 
   small structures are returned in a register.
134 
   Objects with varying size must still be returned in memory.  */
135 
static bool
136 
score_return_in_memory (tree type, tree fndecl ATTRIBUTE_UNUSED)
137 
{
138 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
139 
    return score7_return_in_memory (type, fndecl);
140 
  else if (TARGET_SCORE3)
141 
    return score3_return_in_memory (type, fndecl);
142 
 
143 
  gcc_unreachable ();
144 
}
145 
 
146 
/* Return nonzero when an argument must be passed by reference.  */
147 
static bool
148 
score_pass_by_reference (CUMULATIVE_ARGS *cum ATTRIBUTE_UNUSED,
149 
                         enum machine_mode mode, tree type,
150 
                         bool named ATTRIBUTE_UNUSED)
151 
{
152 
  /* If we have a variable-sized parameter, we have no choice.  */
153 
  return targetm.calls.must_pass_in_stack (mode, type);
154 
}
155 
 
156 
/* Implement TARGET_ASM_OUTPUT_MI_THUNK.  Generate rtl rather than asm text
157 
   in order to avoid duplicating too much logic from elsewhere.  */
158 
static void
159 
score_output_mi_thunk (FILE *file, tree thunk_fndecl ATTRIBUTE_UNUSED,
160 
                       HOST_WIDE_INT delta, HOST_WIDE_INT vcall_offset,
161 
                       tree function)
162 
{
163 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
164 
    return score7_output_mi_thunk (file, thunk_fndecl, delta,
165 
                                   vcall_offset, function);
166 
  else if (TARGET_SCORE3)
167 
    return score3_output_mi_thunk (file, thunk_fndecl, delta,
168 
                                   vcall_offset, function);
169 
  gcc_unreachable ();
170 
}
171 
 
172 
/* Implement TARGET_FUNCTION_OK_FOR_SIBCALL.  */
173 
static bool
174 
score_function_ok_for_sibcall (ATTRIBUTE_UNUSED tree decl,
175 
                               ATTRIBUTE_UNUSED tree exp)
176 
{
177 
  return true;
178 
}
179 
 
180 
/* Set up the stack and frame (if desired) for the function.  */
181 
static void
182 
score_function_prologue (FILE *file, HOST_WIDE_INT size ATTRIBUTE_UNUSED)
183 
{
184 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
185 
    return score7_function_prologue (file, size);
186 
  else if (TARGET_SCORE3)
187 
    return score3_function_prologue (file, size);
188 
 
189 
  gcc_unreachable ();
190 
}
191 
 
192 
/* Do any necessary cleanup after a function to restore stack, frame,
193 
   and regs.  */
194 
static void
195 
score_function_epilogue (FILE *file,
196 
                         HOST_WIDE_INT size ATTRIBUTE_UNUSED)
197 
{
198 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
199 
    return score7_function_epilogue (file, size);
200 
  else if (TARGET_SCORE3)
201 
    return score3_function_epilogue (file, size);
202 
 
203 
  gcc_unreachable ();
204 
}
205 
 
206 
/* Implement TARGET_SCHED_ISSUE_RATE.  */
207 
static int
208 
score_issue_rate (void)
209 
{
210 
  return 1;
211 
}
212 
 
213 
/* Choose the section to use for the constant rtx expression X that has
214 
   mode MODE.  */
215 
static section *
216 
score_select_rtx_section (enum machine_mode mode, rtx x,
217 
                          unsigned HOST_WIDE_INT align)
218 
{
219 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
220 
    return score7_select_rtx_section (mode, x, align);
221 
  else if (TARGET_SCORE3)
222 
    return score3_select_rtx_section (mode, x, align);
223 
 
224 
  gcc_unreachable ();
225 
}
226 
 
227 
/* Implement TARGET_IN_SMALL_DATA_P.  */
228 
static bool
229 
score_in_small_data_p (tree decl)
230 
{
231 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
232 
    return score7_in_small_data_p (decl);
233 
  else if (TARGET_SCORE3)
234 
    return score3_in_small_data_p (decl);
235 
 
236 
  gcc_unreachable ();
237 
}
238 
 
239 
/* Implement TARGET_ASM_FILE_START.  */
240 
static void
241 
score_asm_file_start (void)
242 
{
243 
  if (TARGET_SCORE5)
244 
    fprintf (asm_out_file, "# Sunplus S+core5 %s rev=%s\n",
245 
             TARGET_LITTLE_ENDIAN ? "el" : "eb", SCORE_GCC_VERSION);
246 
  else if (TARGET_SCORE5U)
247 
    fprintf (asm_out_file, "# Sunplus S+core5u %s rev=%s\n",
248 
             TARGET_LITTLE_ENDIAN ? "el" : "eb", SCORE_GCC_VERSION);
249 
  else if (TARGET_SCORE7D)
250 
    fprintf (asm_out_file, "# Sunplus S+core7d %s rev=%s\n",
251 
             TARGET_LITTLE_ENDIAN ? "el" : "eb", SCORE_GCC_VERSION);
252 
  else if (TARGET_SCORE7)
253 
    fprintf (asm_out_file, "# Sunplus S+core7 %s rev=%s\n",
254 
             TARGET_LITTLE_ENDIAN ? "el" : "eb", SCORE_GCC_VERSION);
255 
  else if (TARGET_SCORE3D)
256 
    fprintf (asm_out_file, "# Sunplus S+core3d %s rev=%s\n",
257 
             TARGET_LITTLE_ENDIAN ? "el" : "eb", SCORE_GCC_VERSION);
258 
  else if (TARGET_SCORE3)
259 
    fprintf (asm_out_file, "# Sunplus S+core3 %s rev=%s\n",
260 
             TARGET_LITTLE_ENDIAN ? "el" : "eb", SCORE_GCC_VERSION);
261 
  else
262 
    fprintf (asm_out_file, "# Sunplus S+core unknown %s rev=%s\n",
263 
             TARGET_LITTLE_ENDIAN ? "el" : "eb", SCORE_GCC_VERSION);
264 
 
265 
  default_file_start ();
266 
 
267 
  if (flag_pic)
268 
    fprintf (asm_out_file, "\t.set pic\n");
269 
}
270 
 
271 
/* Implement TARGET_ASM_FILE_END.  When using assembler macros, emit
272 
   .externs for any small-data variables that turned out to be external.  */
273 
static void
274 
score_asm_file_end (void)
275 
{
276 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
277 
    return score7_asm_file_end ();
278 
  else if (TARGET_SCORE3)
279 
    return score3_asm_file_end ();
280 
 
281 
  gcc_unreachable ();
282 
}
283 
 
284 
#define MASK_ALL_CPU_BITS \
285 
  (MASK_SCORE5 | MASK_SCORE5U | MASK_SCORE7 | MASK_SCORE7D \
286 
   | MASK_SCORE3 | MASK_SCORE3D)
287 
 
288 
/* Implement TARGET_HANDLE_OPTION.  */
289 
static bool
290 
score_handle_option (size_t code, const char *arg, int value ATTRIBUTE_UNUSED)
291 
{
292 
  switch (code)
293 
    {
294 
    case OPT_mscore7d:
295 
      target_flags &= ~(MASK_ALL_CPU_BITS);
296 
      target_flags |= MASK_SCORE7 | MASK_SCORE7D;
297 
      return true;
298 
 
299 
    case OPT_mscore3d:
300 
      target_flags &= ~(MASK_ALL_CPU_BITS);
301 
      target_flags |= MASK_SCORE3 | MASK_SCORE3D;
302 
      return true;
303 
 
304 
    case OPT_march_:
305 
      if (strcmp (arg, "score5") == 0)
306 
        {
307 
          target_flags &= ~(MASK_ALL_CPU_BITS);
308 
          target_flags |= MASK_SCORE5;
309 
          return true;
310 
        }
311 
      else if (strcmp (arg, "score5u") == 0)
312 
        {
313 
          target_flags &= ~(MASK_ALL_CPU_BITS);
314 
          target_flags |= MASK_SCORE5U;
315 
          return true;
316 
        }
317 
      else if (strcmp (arg, "score7") == 0)
318 
        {
319 
          target_flags &= ~(MASK_ALL_CPU_BITS);
320 
          target_flags |= MASK_SCORE7;
321 
          return true;
322 
        }
323 
      else if (strcmp (arg, "score7d") == 0)
324 
        {
325 
          target_flags &= ~(MASK_ALL_CPU_BITS);
326 
          target_flags |= MASK_SCORE7 | MASK_SCORE7D;
327 
          return true;
328 
        }
329 
      else if (strcmp (arg, "score3") == 0)
330 
        {
331 
          target_flags &= ~(MASK_ALL_CPU_BITS);
332 
          target_flags |= MASK_SCORE3;
333 
          return true;
334 
        }
335 
      else if (strcmp (arg, "score3d") == 0)
336 
        {
337 
          target_flags &= ~(MASK_ALL_CPU_BITS);
338 
          target_flags |= MASK_SCORE3 | MASK_SCORE3D;
339 
          return true;
340 
        }
341 
      else
342 
        return false;
343 
 
344 
    default:
345 
      return true;
346 
    }
347 
}
348 
 
349 
/* Implement OVERRIDE_OPTIONS macro.  */
350 
void
351 
score_override_options (void)
352 
{
353 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
354 
    return score7_override_options ();
355 
  else if (TARGET_SCORE3)
356 
    return score3_override_options ();
357 
 
358 
  return score7_override_options ();
359 
}
360 
 
361 
/* Implement REGNO_REG_CLASS macro.  */
362 
int
363 
score_reg_class (int regno)
364 
{
365 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
366 
    return score7_reg_class (regno);
367 
  else if (TARGET_SCORE3)
368 
    return score3_reg_class (regno);
369 
 
370 
  gcc_unreachable ();
371 
}
372 
 
373 
/* Implement PREFERRED_RELOAD_CLASS macro.  */
374 
enum reg_class
375 
score_preferred_reload_class (rtx x ATTRIBUTE_UNUSED, enum reg_class rclass)
376 
{
377 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
378 
    return score7_preferred_reload_class (x, rclass);
379 
  else if (TARGET_SCORE3)
380 
    return score3_preferred_reload_class (x, rclass);
381 
 
382 
  gcc_unreachable ();
383 
}
384 
 
385 
/* Implement SECONDARY_INPUT_RELOAD_CLASS
386 
   and SECONDARY_OUTPUT_RELOAD_CLASS macro.  */
387 
enum reg_class
388 
score_secondary_reload_class (enum reg_class rclass,
389 
                              enum machine_mode mode ATTRIBUTE_UNUSED,
390 
                              rtx x)
391 
{
392 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
393 
    return score7_secondary_reload_class (rclass, mode, x);
394 
  else if (TARGET_SCORE3)
395 
    return score3_secondary_reload_class (rclass, mode, x);
396 
 
397 
  gcc_unreachable ();
398 
}
399 
 
400 
/* Implement CONST_OK_FOR_LETTER_P macro.  */
401 
int
402 
score_const_ok_for_letter_p (HOST_WIDE_INT value, char c)
403 
{
404 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
405 
    return score7_const_ok_for_letter_p (value, c);
406 
  else if (TARGET_SCORE3)
407 
    return score3_const_ok_for_letter_p (value, c);
408 
 
409 
  gcc_unreachable ();
410 
}
411 
 
412 
/* Implement EXTRA_CONSTRAINT macro.  */
413 
int
414 
score_extra_constraint (rtx op, char c)
415 
{
416 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
417 
    return score7_extra_constraint (op, c);
418 
  else if (TARGET_SCORE3)
419 
    return score3_extra_constraint (op, c);
420 
 
421 
  gcc_unreachable ();
422 
}
423 
 
424 
/* Return truth value on whether or not a given hard register
425 
   can support a given mode.  */
426 
int
427 
score_hard_regno_mode_ok (unsigned int regno, enum machine_mode mode)
428 
{
429 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
430 
    return score7_hard_regno_mode_ok (regno, mode);
431 
  else if (TARGET_SCORE3)
432 
    return score3_hard_regno_mode_ok (regno, mode);
433 
 
434 
  gcc_unreachable ();
435 
}
436 
 
437 
/* We can always eliminate to the hard frame pointer.  We can eliminate
438 
   to the stack pointer unless a frame pointer is needed.  */
439 
 
440 
static bool
441 
score_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to)
442 
{
443 
  return (to == HARD_FRAME_POINTER_REGNUM
444 
          || (to  == STACK_POINTER_REGNUM && !frame_pointer_needed));
445 
}
446 
 
447 
/* Implement INITIAL_ELIMINATION_OFFSET.  FROM is either the frame
448 
   pointer or argument pointer.  TO is either the stack pointer or
449 
   hard frame pointer.  */
450 
HOST_WIDE_INT
451 
score_initial_elimination_offset (int from,
452 
                                  int to ATTRIBUTE_UNUSED)
453 
{
454 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
455 
    return score7_initial_elimination_offset (from, to);
456 
  else if (TARGET_SCORE3)
457 
    return score3_initial_elimination_offset (from, to);
458 
 
459 
  gcc_unreachable ();
460 
}
461 
 
462 
/* Argument support functions.  */
463 
 
464 
/* Initialize CUMULATIVE_ARGS for a function.  */
465 
void
466 
score_init_cumulative_args (CUMULATIVE_ARGS *cum,
467 
                            tree fntype ATTRIBUTE_UNUSED,
468 
                            rtx libname ATTRIBUTE_UNUSED)
469 
{
470 
  memset (cum, 0, sizeof (CUMULATIVE_ARGS));
471 
}
472 
 
473 
/* Implement FUNCTION_ARG_ADVANCE macro.  */
474 
void
475 
score_function_arg_advance (CUMULATIVE_ARGS *cum, enum machine_mode mode,
476 
                            tree type, int named)
477 
{
478 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
479 
    return score7_function_arg_advance (cum, mode, type, named);
480 
  else if (TARGET_SCORE3)
481 
    return score3_function_arg_advance (cum, mode, type, named);
482 
 
483 
  gcc_unreachable ();
484 
}
485 
 
486 
/* Implement TARGET_ARG_PARTIAL_BYTES macro.  */
487 
int
488 
score_arg_partial_bytes (CUMULATIVE_ARGS *cum,
489 
                         enum machine_mode mode, tree type, bool named)
490 
{
491 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
492 
    return score7_arg_partial_bytes (cum, mode, type, named);
493 
  else if (TARGET_SCORE3)
494 
    return score3_arg_partial_bytes (cum, mode, type, named);
495 
 
496 
  gcc_unreachable ();
497 
}
498 
 
499 
/* Implement FUNCTION_ARG macro.  */
500 
rtx
501 
score_function_arg (const CUMULATIVE_ARGS *cum, enum machine_mode mode,
502 
                    tree type, int named)
503 
{
504 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
505 
    return score7_function_arg (cum, mode, type, named);
506 
  else if (TARGET_SCORE3)
507 
    return score3_function_arg (cum, mode, type, named);
508 
 
509 
  gcc_unreachable ();
510 
}
511 
 
512 
/* Implement FUNCTION_VALUE and LIBCALL_VALUE.  For normal calls,
513 
   VALTYPE is the return type and MODE is VOIDmode.  For libcalls,
514 
   VALTYPE is null and MODE is the mode of the return value.  */
515 
rtx
516 
score_function_value (tree valtype, tree func ATTRIBUTE_UNUSED,
517 
                      enum machine_mode mode)
518 
{
519 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
520 
    return score7_function_value (valtype, func, mode);
521 
  else if (TARGET_SCORE3)
522 
    return score3_function_value (valtype, func, mode);
523 
 
524 
  gcc_unreachable ();
525 
}
526 
 
527 
/* Implement TARGET_ASM_TRAMPOLINE_TEMPLATE.  */
528 
static void
529 
score_asm_trampoline_template (FILE *f)
530 
{
531 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
532 
    return score7_asm_trampoline_template (f);
533 
  else if (TARGET_SCORE3)
534 
    return score3_asm_trampoline_template (f);
535 
 
536 
  gcc_unreachable ();
537 
}
538 
 
539 
/* Implement TARGET_TRAMPOLINE_INIT.  */
540 
static void
541 
score_trampoline_init (rtx m_tramp, tree fndecl, rtx chain_value)
542 
{
543 
  /* ??? These two routines are identical.  */
544 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
545 
    return score7_trampoline_init (m_tramp, fndecl, chain_value);
546 
  else if (TARGET_SCORE3)
547 
    return score3_trampoline_init (m_tramp, fndecl, chain_value);
548 
 
549 
  gcc_unreachable ();
550 
}
551 
 
552 
/* This function is used to implement REG_MODE_OK_FOR_BASE_P macro.  */
553 
int
554 
score_regno_mode_ok_for_base_p (int regno, int strict)
555 
{
556 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
557 
    return score7_regno_mode_ok_for_base_p (regno, strict);
558 
  else if (TARGET_SCORE3)
559 
    return score3_regno_mode_ok_for_base_p (regno, strict);
560 
 
561 
  gcc_unreachable ();
562 
}
563 
 
564 
/* Implement TARGET_LEGITIMIZE_ADDRESS_P.  */
565 
bool
566 
score_legitimate_address_p (enum machine_mode mode, rtx x, bool strict)
567 
{
568 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
569 
    return score7_legitimate_address_p (mode, x, strict);
570 
  else if (TARGET_SCORE3)
571 
    return score3_legitimate_address_p (mode, x, strict);
572 
 
573 
  gcc_unreachable ();
574 
}
575 
 
576 
/* This function is used to implement LEGITIMIZE_ADDRESS.  If X can
577 
   be legitimized in a way that the generic machinery might not expect,
578 
   return the new address, else return X.  */
579 
static rtx
580 
score_legitimize_address (rtx x, rtx oldx ATTRIBUTE_UNUSED,
581 
                          enum machine_mode mode ATTRIBUTE_UNUSED)
582 
{
583 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
584 
    return score7_legitimize_address (x);
585 
  else if (TARGET_SCORE3)
586 
    return score3_legitimize_address (x);
587 
 
588 
  gcc_unreachable ();
589 
}
590 
 
591 
/* Return a number assessing the cost of moving a register in class
592 
   FROM to class TO. */
593 
int
594 
score_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED,
595 
                          enum reg_class from, enum reg_class to)
596 
{
597 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
598 
    return score7_register_move_cost (mode, from, to);
599 
  else if (TARGET_SCORE3)
600 
    return score3_register_move_cost (mode, from, to);
601 
 
602 
  gcc_unreachable ();
603 
}
604 
 
605 
/* Implement TARGET_RTX_COSTS macro.  */
606 
bool
607 
score_rtx_costs (rtx x, int code, int outer_code, int *total,
608 
                 bool speed ATTRIBUTE_UNUSED)
609 
{
610 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
611 
    return score7_rtx_costs (x, code, outer_code, total, speed);
612 
  else if (TARGET_SCORE3)
613 
    return score3_rtx_costs (x, code, outer_code, total, speed);
614 
 
615 
  gcc_unreachable ();
616 
}
617 
 
618 
/* Implement TARGET_ADDRESS_COST macro.  */
619 
int
620 
score_address_cost (rtx addr,
621 
                    bool speed ATTRIBUTE_UNUSED)
622 
{
623 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
624 
    return score7_address_cost (addr);
625 
  else if (TARGET_SCORE3)
626 
    return score3_address_cost (addr);
627 
 
628 
  gcc_unreachable ();
629 
}
630 
 
631 
/* Implement ASM_OUTPUT_EXTERNAL macro.  */
632 
int
633 
score_output_external (FILE *file ATTRIBUTE_UNUSED,
634 
                       tree decl, const char *name)
635 
{
636 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
637 
    return score7_output_external (file, decl, name);
638 
  else if (TARGET_SCORE3)
639 
    return score3_output_external (file, decl, name);
640 
 
641 
  gcc_unreachable ();
642 
}
643 
 
644 
/* Implement RETURN_ADDR_RTX.  Note, we do not support moving
645 
   back to a previous frame.  */
646 
rtx
647 
score_return_addr (int count, rtx frame ATTRIBUTE_UNUSED)
648 
{
649 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
650 
    return score7_return_addr (count, frame);
651 
  else if (TARGET_SCORE3)
652 
    return score3_return_addr (count, frame);
653 
 
654 
  gcc_unreachable ();
655 
}
656 
 
657 
/* Implement PRINT_OPERAND macro.  */
658 
void
659 
score_print_operand (FILE *file, rtx op, int c)
660 
{
661 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
662 
    return score7_print_operand (file, op, c);
663 
  else if (TARGET_SCORE3)
664 
    return score3_print_operand (file, op, c);
665 
 
666 
  gcc_unreachable ();
667 
}
668 
 
669 
/* Implement PRINT_OPERAND_ADDRESS macro.  */
670 
void
671 
score_print_operand_address (FILE *file, rtx x)
672 
{
673 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
674 
    return score7_print_operand_address (file, x);
675 
  else if (TARGET_SCORE3)
676 
    return score3_print_operand_address (file, x);
677 
 
678 
  gcc_unreachable ();
679 
}
680 
 
681 
/* Implement SELECT_CC_MODE macro.  */
682 
enum machine_mode
683 
score_select_cc_mode (enum rtx_code op, rtx x, rtx y)
684 
{
685 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
686 
    return score7_select_cc_mode (op, x, y);
687 
  else if (TARGET_SCORE3)
688 
    return score3_select_cc_mode (op, x, y);
689 
 
690 
  gcc_unreachable ();
691 
}
692 
 
693 
/* Return true if X is a symbolic constant that can be calculated in
694 
   the same way as a bare symbol.  If it is, store the type of the
695 
   symbol in *SYMBOL_TYPE.  */
696 
int
697 
score_symbolic_constant_p (rtx x, enum score_symbol_type *symbol_type)
698 
{
699 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
700 
    return score7_symbolic_constant_p (x, symbol_type);
701 
  else if (TARGET_SCORE3)
702 
    return score3_symbolic_constant_p (x, symbol_type);
703 
 
704 
  gcc_unreachable ();
705 
}
706 
 
707 
/* Generate the prologue instructions for entry into a S+core function.  */
708 
void
709 
score_prologue (void)
710 
{
711 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
712 
    return score7_prologue ();
713 
  else if (TARGET_SCORE3)
714 
    return score3_prologue ();
715 
 
716 
  gcc_unreachable ();
717 
}
718 
 
719 
/* Generate the epilogue instructions in a S+core function.  */
720 
void
721 
score_epilogue (int sibcall_p)
722 
{
723 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
724 
    return score7_epilogue (sibcall_p);
725 
  else if (TARGET_SCORE3)
726 
    return score3_epilogue (sibcall_p);
727 
 
728 
  gcc_unreachable ();
729 
}
730 
 
731 
/* Call and sibcall pattern all need call this function.  */
732 
void
733 
score_call (rtx *ops, bool sib)
734 
{
735 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
736 
    return score7_call (ops, sib);
737 
  else if (TARGET_SCORE3)
738 
    return score3_call (ops, sib);
739 
 
740 
  gcc_unreachable ();
741 
}
742 
 
743 
/* Call value and sibcall value pattern all need call this function.  */
744 
void
745 
score_call_value (rtx *ops, bool sib)
746 
{
747 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
748 
    return score7_call_value (ops, sib);
749 
  else if (TARGET_SCORE3)
750 
    return score3_call_value (ops, sib);
751 
 
752 
  gcc_unreachable ();
753 
}
754 
 
755 
void
756 
score_movsicc (rtx *ops)
757 
{
758 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
759 
    return score7_movsicc (ops);
760 
  else if (TARGET_SCORE3)
761 
    return score3_movsicc (ops);
762 
 
763 
  gcc_unreachable ();
764 
}
765 
 
766 
/* Machine Split  */
767 
void
768 
score_movdi (rtx *ops)
769 
{
770 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
771 
    return score7_movdi (ops);
772 
  else if (TARGET_SCORE3)
773 
    return score3_movdi (ops);
774 
 
775 
  gcc_unreachable ();
776 
}
777 
 
778 
void
779 
score_zero_extract_andi (rtx *ops)
780 
{
781 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
782 
    return score7_zero_extract_andi (ops);
783 
  else if (TARGET_SCORE3)
784 
    return score3_zero_extract_andi (ops);
785 
 
786 
  gcc_unreachable ();
787 
}
788 
 
789 
/* Output asm insn for move.  */
790 
const char *
791 
score_move (rtx *ops)
792 
{
793 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
794 
    return score7_move (ops);
795 
  else if (TARGET_SCORE3)
796 
    return score3_move (ops);
797 
 
798 
  gcc_unreachable ();
799 
}
800 
 
801 
/* Output asm insn for load.  */
802 
const char *
803 
score_linsn (rtx *ops, enum score_mem_unit unit, bool sign)
804 
{
805 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
806 
    return score7_linsn (ops, unit, sign);
807 
  else if (TARGET_SCORE3)
808 
    return score3_linsn (ops, unit, sign);
809 
 
810 
  gcc_unreachable ();
811 
}
812 
 
813 
/* Output asm insn for store.  */
814 
const char *
815 
score_sinsn (rtx *ops, enum score_mem_unit unit)
816 
{
817 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
818 
    return score7_sinsn (ops, unit);
819 
  else if (TARGET_SCORE3)
820 
    return score3_sinsn (ops, unit);
821 
 
822 
  gcc_unreachable ();
823 
}
824 
 
825 
/* Output asm insn for load immediate.  */
826 
const char *
827 
score_limm (rtx *ops)
828 
{
829 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
830 
    return score7_limm (ops);
831 
  else if (TARGET_SCORE3)
832 
    return score3_limm (ops);
833 
 
834 
  gcc_unreachable ();
835 
}
836 
 
837 
 
838 
/* Generate add insn.  */
839 
const char *
840 
score_select_add_imm (rtx *ops, bool set_cc)
841 
{
842 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
843 
    return score7_select_add_imm (ops, set_cc);
844 
  else if (TARGET_SCORE3)
845 
    return score3_select_add_imm (ops, set_cc);
846 
 
847 
  gcc_unreachable ();
848 
}
849 
 
850 
/* Output arith insn.  */
851 
const char *
852 
score_select (rtx *ops, const char *inst_pre,
853 
            bool commu, const char *letter, bool set_cc)
854 
{
855 
  if (TARGET_SCORE5 || TARGET_SCORE5U || TARGET_SCORE7 || TARGET_SCORE7D)
856 
    return score7_select (ops, inst_pre, commu, letter, set_cc);
857 
  else if (TARGET_SCORE3)
858 
    return score3_select (ops, inst_pre, commu, letter, set_cc);
859 
 
860 
  gcc_unreachable ();
861 
}
862 
 
863 
/* Output switch case insn, only supported in score3.  */
864 
const char *
865 
score_output_casesi (rtx *operands)
866 
{
867 
  if (TARGET_SCORE3)
868 
    return score3_output_casesi (operands);
869 
 
870 
  gcc_unreachable ();
871 
}
872 
 
873 
/* Output rpush insn, only supported in score3.  */
874 
const char *
875 
score_rpush (rtx *operands)
876 
{
877 
  if (TARGET_SCORE3)
878 
    return score3_rpush (operands);
879 
 
880 
  gcc_unreachable ();
881 
}
882 
 
883 
/* Output rpop insn, only supported in score3.  */
884 
const char *
885 
score_rpop (rtx *operands)
886 
{
887 
  if (TARGET_SCORE3)
888 
    return score3_rpop (operands);
889 
 
890 
  gcc_unreachable ();
891 
}
892 
 
893 
/* Emit lcb/lce insns.  */
894 
bool
895 
score_unaligned_load (rtx *ops)
896 
{
897 
  rtx dst = ops[0];
898 
  rtx src = ops[1];
899 
  rtx len = ops[2];
900 
  rtx off = ops[3];
901 
  rtx addr_reg;
902 
 
903 
  if (INTVAL (len) != BITS_PER_WORD
904 
      || (INTVAL (off) % BITS_PER_UNIT) != 0)
905 
    return false;
906 
 
907 
  gcc_assert (GET_MODE_SIZE (GET_MODE (dst)) == GET_MODE_SIZE (SImode));
908 
 
909 
  addr_reg = copy_addr_to_reg (XEXP (src, 0));
910 
  emit_insn (gen_move_lcb (addr_reg, addr_reg));
911 
  emit_insn (gen_move_lce (addr_reg, addr_reg, dst));
912 
 
913 
  return true;
914 
}
915 
 
916 
/* Emit scb/sce insns.  */
917 
bool
918 
score_unaligned_store (rtx *ops)
919 
{
920 
  rtx dst = ops[0];
921 
  rtx len = ops[1];
922 
  rtx off = ops[2];
923 
  rtx src = ops[3];
924 
  rtx addr_reg;
925 
 
926 
  if (INTVAL(len) != BITS_PER_WORD
927 
      || (INTVAL(off) % BITS_PER_UNIT) != 0)
928 
    return false;
929 
 
930 
  gcc_assert (GET_MODE_SIZE (GET_MODE (src)) == GET_MODE_SIZE (SImode));
931 
 
932 
  addr_reg = copy_addr_to_reg (XEXP (dst, 0));
933 
  emit_insn (gen_move_scb (addr_reg, addr_reg, src));
934 
  emit_insn (gen_move_sce (addr_reg, addr_reg));
935 
 
936 
  return true;
937 
}
938 
 
939 
/* If length is short, generate move insns straight.  */
940 
static void
941 
score_block_move_straight (rtx dst, rtx src, HOST_WIDE_INT length)
942 
{
943 
  HOST_WIDE_INT leftover;
944 
  int i, reg_count;
945 
  rtx *regs;
946 
 
947 
  leftover = length % UNITS_PER_WORD;
948 
  length -= leftover;
949 
  reg_count = length / UNITS_PER_WORD;
950 
 
951 
  regs = XALLOCAVEC (rtx, reg_count);
952 
  for (i = 0; i < reg_count; i++)
953 
    regs[i] = gen_reg_rtx (SImode);
954 
 
955 
  /* Load from src to regs.  */
956 
  if (MEM_ALIGN (src) >= BITS_PER_WORD)
957 
    {
958 
      HOST_WIDE_INT offset = 0;
959 
      for (i = 0; i < reg_count; offset += UNITS_PER_WORD, i++)
960 
        emit_move_insn (regs[i], adjust_address (src, SImode, offset));
961 
    }
962 
  else if (reg_count >= 1)
963 
    {
964 
      rtx src_reg = copy_addr_to_reg (XEXP (src, 0));
965 
 
966 
      emit_insn (gen_move_lcb (src_reg, src_reg));
967 
      for (i = 0; i < (reg_count - 1); i++)
968 
        emit_insn (gen_move_lcw (src_reg, src_reg, regs[i]));
969 
      emit_insn (gen_move_lce (src_reg, src_reg, regs[i]));
970 
    }
971 
 
972 
  /* Store regs to dest.  */
973 
  if (MEM_ALIGN (dst) >= BITS_PER_WORD)
974 
    {
975 
      HOST_WIDE_INT offset = 0;
976 
      for (i = 0; i < reg_count; offset += UNITS_PER_WORD, i++)
977 
        emit_move_insn (adjust_address (dst, SImode, offset), regs[i]);
978 
    }
979 
  else if (reg_count >= 1)
980 
    {
981 
      rtx dst_reg = copy_addr_to_reg (XEXP (dst, 0));
982 
 
983 
      emit_insn (gen_move_scb (dst_reg, dst_reg, regs[0]));
984 
      for (i = 1; i < reg_count; i++)
985 
        emit_insn (gen_move_scw (dst_reg, dst_reg, regs[i]));
986 
      emit_insn (gen_move_sce (dst_reg, dst_reg));
987 
    }
988 
 
989 
  /* Mop up any left-over bytes.  */
990 
  if (leftover > 0)
991 
    {
992 
      src = adjust_address (src, BLKmode, length);
993 
      dst = adjust_address (dst, BLKmode, length);
994 
      move_by_pieces (dst, src, leftover,
995 
                      MIN (MEM_ALIGN (src), MEM_ALIGN (dst)), 0);
996 
    }
997 
}
998 
 
999 
/* Generate loop head when dst or src is unaligned.  */
1000 
static void
1001 
score_block_move_loop_head (rtx dst_reg, HOST_WIDE_INT dst_align,
1002 
                            rtx src_reg, HOST_WIDE_INT src_align,
1003 
                            HOST_WIDE_INT length)
1004 
{
1005 
  bool src_unaligned = (src_align < BITS_PER_WORD);
1006 
  bool dst_unaligned = (dst_align < BITS_PER_WORD);
1007 
 
1008 
  rtx temp = gen_reg_rtx (SImode);
1009 
 
1010 
  gcc_assert (length == UNITS_PER_WORD);
1011 
 
1012 
  if (src_unaligned)
1013 
    {
1014 
      emit_insn (gen_move_lcb (src_reg, src_reg));
1015 
      emit_insn (gen_move_lcw (src_reg, src_reg, temp));
1016 
    }
1017 
  else
1018 
    emit_insn (gen_move_lw_a (src_reg,
1019 
                              src_reg, gen_int_mode (4, SImode), temp));
1020 
 
1021 
  if (dst_unaligned)
1022 
    emit_insn (gen_move_scb (dst_reg, dst_reg, temp));
1023 
  else
1024 
    emit_insn (gen_move_sw_a (dst_reg,
1025 
                              dst_reg, gen_int_mode (4, SImode), temp));
1026 
}
1027 
 
1028 
/* Generate loop body, copy length bytes per iteration.  */
1029 
static void
1030 
score_block_move_loop_body (rtx dst_reg, HOST_WIDE_INT dst_align,
1031 
                            rtx src_reg, HOST_WIDE_INT src_align,
1032 
                            HOST_WIDE_INT length)
1033 
{
1034 
  int reg_count = length / UNITS_PER_WORD;
1035 
  rtx *regs = XALLOCAVEC (rtx, reg_count);
1036 
  int i;
1037 
  bool src_unaligned = (src_align < BITS_PER_WORD);
1038 
  bool dst_unaligned = (dst_align < BITS_PER_WORD);
1039 
 
1040 
  for (i = 0; i < reg_count; i++)
1041 
    regs[i] = gen_reg_rtx (SImode);
1042 
 
1043 
  if (src_unaligned)
1044 
    {
1045 
      for (i = 0; i < reg_count; i++)
1046 
        emit_insn (gen_move_lcw (src_reg, src_reg, regs[i]));
1047 
    }
1048 
  else
1049 
    {
1050 
      for (i = 0; i < reg_count; i++)
1051 
        emit_insn (gen_move_lw_a (src_reg,
1052 
                                  src_reg, gen_int_mode (4, SImode), regs[i]));
1053 
    }
1054 
 
1055 
  if (dst_unaligned)
1056 
    {
1057 
      for (i = 0; i < reg_count; i++)
1058 
        emit_insn (gen_move_scw (dst_reg, dst_reg, regs[i]));
1059 
    }
1060 
  else
1061 
    {
1062 
      for (i = 0; i < reg_count; i++)
1063 
        emit_insn (gen_move_sw_a (dst_reg,
1064 
                                  dst_reg, gen_int_mode (4, SImode), regs[i]));
1065 
    }
1066 
}
1067 
 
1068 
/* Generate loop foot, copy the leftover bytes.  */
1069 
static void
1070 
score_block_move_loop_foot (rtx dst_reg, HOST_WIDE_INT dst_align,
1071 
                            rtx src_reg, HOST_WIDE_INT src_align,
1072 
                            HOST_WIDE_INT length)
1073 
{
1074 
  bool src_unaligned = (src_align < BITS_PER_WORD);
1075 
  bool dst_unaligned = (dst_align < BITS_PER_WORD);
1076 
 
1077 
  HOST_WIDE_INT leftover;
1078 
 
1079 
  leftover = length % UNITS_PER_WORD;
1080 
  length -= leftover;
1081 
 
1082 
  if (length > 0)
1083 
    score_block_move_loop_body (dst_reg, dst_align,
1084 
                              src_reg, src_align, length);
1085 
 
1086 
  if (dst_unaligned)
1087 
    emit_insn (gen_move_sce (dst_reg, dst_reg));
1088 
 
1089 
  if (leftover > 0)
1090 
    {
1091 
      HOST_WIDE_INT src_adj = src_unaligned ? -4 : 0;
1092 
      HOST_WIDE_INT dst_adj = dst_unaligned ? -4 : 0;
1093 
      rtx temp;
1094 
 
1095 
      gcc_assert (leftover < UNITS_PER_WORD);
1096 
 
1097 
      if (leftover >= UNITS_PER_WORD / 2
1098 
          && src_align >= BITS_PER_WORD / 2
1099 
          && dst_align >= BITS_PER_WORD / 2)
1100 
        {
1101 
          temp = gen_reg_rtx (HImode);
1102 
          emit_insn (gen_move_lhu_b (src_reg, src_reg,
1103 
                                     gen_int_mode (src_adj, SImode), temp));
1104 
          emit_insn (gen_move_sh_b (dst_reg, dst_reg,
1105 
                                    gen_int_mode (dst_adj, SImode), temp));
1106 
          leftover -= UNITS_PER_WORD / 2;
1107 
          src_adj = UNITS_PER_WORD / 2;
1108 
          dst_adj = UNITS_PER_WORD / 2;
1109 
        }
1110 
 
1111 
      while (leftover > 0)
1112 
        {
1113 
          temp = gen_reg_rtx (QImode);
1114 
          emit_insn (gen_move_lbu_b (src_reg, src_reg,
1115 
                                     gen_int_mode (src_adj, SImode), temp));
1116 
          emit_insn (gen_move_sb_b (dst_reg, dst_reg,
1117 
                                    gen_int_mode (dst_adj, SImode), temp));
1118 
          leftover--;
1119 
          src_adj = 1;
1120 
          dst_adj = 1;
1121 
        }
1122 
    }
1123 
}
1124 
 
1125 
#define MIN_MOVE_REGS 3
1126 
#define MIN_MOVE_BYTES (MIN_MOVE_REGS * UNITS_PER_WORD)
1127 
#define MAX_MOVE_REGS 4
1128 
#define MAX_MOVE_BYTES (MAX_MOVE_REGS * UNITS_PER_WORD)
1129 
 
1130 
/* The length is large, generate a loop if necessary.
1131 
   The loop is consisted by loop head/body/foot.  */
1132 
static void
1133 
score_block_move_loop (rtx dst, rtx src, HOST_WIDE_INT length)
1134 
{
1135 
  HOST_WIDE_INT src_align = MEM_ALIGN (src);
1136 
  HOST_WIDE_INT dst_align = MEM_ALIGN (dst);
1137 
  HOST_WIDE_INT loop_mov_bytes;
1138 
  HOST_WIDE_INT iteration = 0;
1139 
  HOST_WIDE_INT head_length = 0, leftover;
1140 
  rtx label, src_reg, dst_reg, final_dst, test;
1141 
 
1142 
  bool gen_loop_head = (src_align < BITS_PER_WORD
1143 
                        || dst_align < BITS_PER_WORD);
1144 
 
1145 
  if (gen_loop_head)
1146 
    head_length += UNITS_PER_WORD;
1147 
 
1148 
  for (loop_mov_bytes = MAX_MOVE_BYTES;
1149 
       loop_mov_bytes >= MIN_MOVE_BYTES;
1150 
       loop_mov_bytes -= UNITS_PER_WORD)
1151 
    {
1152 
      iteration = (length - head_length) / loop_mov_bytes;
1153 
      if (iteration > 1)
1154 
        break;
1155 
    }
1156 
  if (iteration <= 1)
1157 
    {
1158 
      score_block_move_straight (dst, src, length);
1159 
      return;
1160 
    }
1161 
 
1162 
  leftover = (length - head_length) % loop_mov_bytes;
1163 
  length -= leftover;
1164 
 
1165 
  src_reg = copy_addr_to_reg (XEXP (src, 0));
1166 
  dst_reg = copy_addr_to_reg (XEXP (dst, 0));
1167 
  final_dst = expand_simple_binop (Pmode, PLUS, dst_reg, GEN_INT (length),
1168 
                                   0, 0, OPTAB_WIDEN);
1169 
 
1170 
  if (gen_loop_head)
1171 
    score_block_move_loop_head (dst_reg, dst_align,
1172 
                              src_reg, src_align, head_length);
1173 
 
1174 
  label = gen_label_rtx ();
1175 
  emit_label (label);
1176 
 
1177 
  score_block_move_loop_body (dst_reg, dst_align,
1178 
                            src_reg, src_align, loop_mov_bytes);
1179 
 
1180 
  test = gen_rtx_NE (VOIDmode, dst_reg, final_dst);
1181 
  emit_jump_insn (gen_cbranchsi4 (test, dst_reg, final_dst, label));
1182 
 
1183 
  score_block_move_loop_foot (dst_reg, dst_align,
1184 
                            src_reg, src_align, leftover);
1185 
}
1186 
 
1187 
/* Generate block move, for misc.md: "movmemsi".  */
1188 
bool
1189 
score_block_move (rtx *ops)
1190 
{
1191 
  rtx dst = ops[0];
1192 
  rtx src = ops[1];
1193 
  rtx length = ops[2];
1194 
 
1195 
  if (TARGET_LITTLE_ENDIAN
1196 
      && (MEM_ALIGN (src) < BITS_PER_WORD || MEM_ALIGN (dst) < BITS_PER_WORD)
1197 
      && INTVAL (length) >= UNITS_PER_WORD)
1198 
    return false;
1199 
 
1200 
  if (GET_CODE (length) == CONST_INT)
1201 
    {
1202 
      if (INTVAL (length) <= 2 * MAX_MOVE_BYTES)
1203 
        {
1204 
          score_block_move_straight (dst, src, INTVAL (length));
1205 
          return true;
1206 
        }
1207 
      else if (optimize &&
1208 
               !(flag_unroll_loops || flag_unroll_all_loops))
1209 
        {
1210 
          score_block_move_loop (dst, src, INTVAL (length));
1211 
          return true;
1212 
        }
1213 
    }
1214 
  return false;
1215 
}
1216 
 
1217 
struct gcc_target targetm = TARGET_INITIALIZER;

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