root / tcg / tcg.c @ 6a8d7b76
History | View | Annotate | Download (56.2 kB)
1 |
/*
|
---|---|
2 |
* Tiny Code Generator for QEMU
|
3 |
*
|
4 |
* Copyright (c) 2008 Fabrice Bellard
|
5 |
*
|
6 |
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
7 |
* of this software and associated documentation files (the "Software"), to deal
|
8 |
* in the Software without restriction, including without limitation the rights
|
9 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
10 |
* copies of the Software, and to permit persons to whom the Software is
|
11 |
* furnished to do so, subject to the following conditions:
|
12 |
*
|
13 |
* The above copyright notice and this permission notice shall be included in
|
14 |
* all copies or substantial portions of the Software.
|
15 |
*
|
16 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
17 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
18 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
19 |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
20 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
21 |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
22 |
* THE SOFTWARE.
|
23 |
*/
|
24 |
|
25 |
/* define it to suppress various consistency checks (faster) */
|
26 |
#define NDEBUG
|
27 |
|
28 |
/* define it to use liveness analysis (better code) */
|
29 |
#define USE_LIVENESS_ANALYSIS
|
30 |
|
31 |
#include <assert.h> |
32 |
#include <stdarg.h> |
33 |
#include <stdlib.h> |
34 |
#include <stdio.h> |
35 |
#include <string.h> |
36 |
#include <inttypes.h> |
37 |
#ifdef _WIN32
|
38 |
#include <malloc.h> |
39 |
#endif
|
40 |
|
41 |
#include "config.h" |
42 |
#include "qemu-common.h" |
43 |
|
44 |
/* Note: the long term plan is to reduce the dependancies on the QEMU
|
45 |
CPU definitions. Currently they are used for qemu_ld/st
|
46 |
instructions */
|
47 |
#define NO_CPU_IO_DEFS
|
48 |
#include "cpu.h" |
49 |
#include "exec-all.h" |
50 |
|
51 |
#include "tcg-op.h" |
52 |
#include "elf.h" |
53 |
|
54 |
|
55 |
static void patch_reloc(uint8_t *code_ptr, int type, |
56 |
tcg_target_long value, tcg_target_long addend); |
57 |
|
58 |
TCGOpDef tcg_op_defs[] = { |
59 |
#define DEF(s, n, copy_size) { #s, 0, 0, n, n, 0, copy_size }, |
60 |
#define DEF2(s, iargs, oargs, cargs, flags) { #s, iargs, oargs, cargs, iargs + oargs + cargs, flags, 0 }, |
61 |
#include "tcg-opc.h" |
62 |
#undef DEF
|
63 |
#undef DEF2
|
64 |
}; |
65 |
|
66 |
TCGRegSet tcg_target_available_regs[2];
|
67 |
TCGRegSet tcg_target_call_clobber_regs; |
68 |
|
69 |
/* XXX: move that inside the context */
|
70 |
uint16_t *gen_opc_ptr; |
71 |
TCGArg *gen_opparam_ptr; |
72 |
|
73 |
static inline void tcg_out8(TCGContext *s, uint8_t v) |
74 |
{ |
75 |
*s->code_ptr++ = v; |
76 |
} |
77 |
|
78 |
static inline void tcg_out16(TCGContext *s, uint16_t v) |
79 |
{ |
80 |
*(uint16_t *)s->code_ptr = v; |
81 |
s->code_ptr += 2;
|
82 |
} |
83 |
|
84 |
static inline void tcg_out32(TCGContext *s, uint32_t v) |
85 |
{ |
86 |
*(uint32_t *)s->code_ptr = v; |
87 |
s->code_ptr += 4;
|
88 |
} |
89 |
|
90 |
/* label relocation processing */
|
91 |
|
92 |
void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type, |
93 |
int label_index, long addend) |
94 |
{ |
95 |
TCGLabel *l; |
96 |
TCGRelocation *r; |
97 |
|
98 |
l = &s->labels[label_index]; |
99 |
if (l->has_value) {
|
100 |
/* FIXME: This may break relocations on RISC targets that
|
101 |
modify instruction fields in place. The caller may not have
|
102 |
written the initial value. */
|
103 |
patch_reloc(code_ptr, type, l->u.value, addend); |
104 |
} else {
|
105 |
/* add a new relocation entry */
|
106 |
r = tcg_malloc(sizeof(TCGRelocation));
|
107 |
r->type = type; |
108 |
r->ptr = code_ptr; |
109 |
r->addend = addend; |
110 |
r->next = l->u.first_reloc; |
111 |
l->u.first_reloc = r; |
112 |
} |
113 |
} |
114 |
|
115 |
static void tcg_out_label(TCGContext *s, int label_index, |
116 |
tcg_target_long value) |
117 |
{ |
118 |
TCGLabel *l; |
119 |
TCGRelocation *r; |
120 |
|
121 |
l = &s->labels[label_index]; |
122 |
if (l->has_value)
|
123 |
tcg_abort(); |
124 |
r = l->u.first_reloc; |
125 |
while (r != NULL) { |
126 |
patch_reloc(r->ptr, r->type, value, r->addend); |
127 |
r = r->next; |
128 |
} |
129 |
l->has_value = 1;
|
130 |
l->u.value = value; |
131 |
} |
132 |
|
133 |
int gen_new_label(void) |
134 |
{ |
135 |
TCGContext *s = &tcg_ctx; |
136 |
int idx;
|
137 |
TCGLabel *l; |
138 |
|
139 |
if (s->nb_labels >= TCG_MAX_LABELS)
|
140 |
tcg_abort(); |
141 |
idx = s->nb_labels++; |
142 |
l = &s->labels[idx]; |
143 |
l->has_value = 0;
|
144 |
l->u.first_reloc = NULL;
|
145 |
return idx;
|
146 |
} |
147 |
|
148 |
#include "tcg-target.c" |
149 |
|
150 |
/* pool based memory allocation */
|
151 |
void *tcg_malloc_internal(TCGContext *s, int size) |
152 |
{ |
153 |
TCGPool *p; |
154 |
int pool_size;
|
155 |
|
156 |
if (size > TCG_POOL_CHUNK_SIZE) {
|
157 |
/* big malloc: insert a new pool (XXX: could optimize) */
|
158 |
p = qemu_malloc(sizeof(TCGPool) + size);
|
159 |
p->size = size; |
160 |
if (s->pool_current)
|
161 |
s->pool_current->next = p; |
162 |
else
|
163 |
s->pool_first = p; |
164 |
p->next = s->pool_current; |
165 |
} else {
|
166 |
p = s->pool_current; |
167 |
if (!p) {
|
168 |
p = s->pool_first; |
169 |
if (!p)
|
170 |
goto new_pool;
|
171 |
} else {
|
172 |
if (!p->next) {
|
173 |
new_pool:
|
174 |
pool_size = TCG_POOL_CHUNK_SIZE; |
175 |
p = qemu_malloc(sizeof(TCGPool) + pool_size);
|
176 |
p->size = pool_size; |
177 |
p->next = NULL;
|
178 |
if (s->pool_current)
|
179 |
s->pool_current->next = p; |
180 |
else
|
181 |
s->pool_first = p; |
182 |
} else {
|
183 |
p = p->next; |
184 |
} |
185 |
} |
186 |
} |
187 |
s->pool_current = p; |
188 |
s->pool_cur = p->data + size; |
189 |
s->pool_end = p->data + p->size; |
190 |
return p->data;
|
191 |
} |
192 |
|
193 |
void tcg_pool_reset(TCGContext *s)
|
194 |
{ |
195 |
s->pool_cur = s->pool_end = NULL;
|
196 |
s->pool_current = NULL;
|
197 |
} |
198 |
|
199 |
/* free all the pool */
|
200 |
void tcg_pool_free(TCGContext *s)
|
201 |
{ |
202 |
TCGPool *p, *p1; |
203 |
|
204 |
for(p = s->pool_first; p != NULL; p = p1) { |
205 |
p1 = p->next; |
206 |
qemu_free(p); |
207 |
} |
208 |
s->pool_first = NULL;
|
209 |
s->pool_cur = s->pool_end = NULL;
|
210 |
} |
211 |
|
212 |
void tcg_context_init(TCGContext *s)
|
213 |
{ |
214 |
int op, total_args, n;
|
215 |
TCGOpDef *def; |
216 |
TCGArgConstraint *args_ct; |
217 |
int *sorted_args;
|
218 |
|
219 |
memset(s, 0, sizeof(*s)); |
220 |
s->temps = s->static_temps; |
221 |
s->nb_globals = 0;
|
222 |
|
223 |
/* Count total number of arguments and allocate the corresponding
|
224 |
space */
|
225 |
total_args = 0;
|
226 |
for(op = 0; op < NB_OPS; op++) { |
227 |
def = &tcg_op_defs[op]; |
228 |
n = def->nb_iargs + def->nb_oargs; |
229 |
total_args += n; |
230 |
} |
231 |
|
232 |
args_ct = qemu_malloc(sizeof(TCGArgConstraint) * total_args);
|
233 |
sorted_args = qemu_malloc(sizeof(int) * total_args); |
234 |
|
235 |
for(op = 0; op < NB_OPS; op++) { |
236 |
def = &tcg_op_defs[op]; |
237 |
def->args_ct = args_ct; |
238 |
def->sorted_args = sorted_args; |
239 |
n = def->nb_iargs + def->nb_oargs; |
240 |
sorted_args += n; |
241 |
args_ct += n; |
242 |
} |
243 |
|
244 |
tcg_target_init(s); |
245 |
|
246 |
/* init global prologue and epilogue */
|
247 |
s->code_buf = code_gen_prologue; |
248 |
s->code_ptr = s->code_buf; |
249 |
tcg_target_qemu_prologue(s); |
250 |
flush_icache_range((unsigned long)s->code_buf, |
251 |
(unsigned long)s->code_ptr); |
252 |
} |
253 |
|
254 |
void tcg_set_frame(TCGContext *s, int reg, |
255 |
tcg_target_long start, tcg_target_long size) |
256 |
{ |
257 |
s->frame_start = start; |
258 |
s->frame_end = start + size; |
259 |
s->frame_reg = reg; |
260 |
} |
261 |
|
262 |
void tcg_set_macro_func(TCGContext *s, TCGMacroFunc *func)
|
263 |
{ |
264 |
s->macro_func = func; |
265 |
} |
266 |
|
267 |
void tcg_func_start(TCGContext *s)
|
268 |
{ |
269 |
tcg_pool_reset(s); |
270 |
s->nb_temps = s->nb_globals; |
271 |
s->labels = tcg_malloc(sizeof(TCGLabel) * TCG_MAX_LABELS);
|
272 |
s->nb_labels = 0;
|
273 |
s->current_frame_offset = s->frame_start; |
274 |
|
275 |
gen_opc_ptr = gen_opc_buf; |
276 |
gen_opparam_ptr = gen_opparam_buf; |
277 |
} |
278 |
|
279 |
static inline void tcg_temp_alloc(TCGContext *s, int n) |
280 |
{ |
281 |
if (n > TCG_MAX_TEMPS)
|
282 |
tcg_abort(); |
283 |
} |
284 |
|
285 |
TCGv tcg_global_reg_new(TCGType type, int reg, const char *name) |
286 |
{ |
287 |
TCGContext *s = &tcg_ctx; |
288 |
TCGTemp *ts; |
289 |
int idx;
|
290 |
|
291 |
#if TCG_TARGET_REG_BITS == 32 |
292 |
if (type != TCG_TYPE_I32)
|
293 |
tcg_abort(); |
294 |
#endif
|
295 |
if (tcg_regset_test_reg(s->reserved_regs, reg))
|
296 |
tcg_abort(); |
297 |
idx = s->nb_globals; |
298 |
tcg_temp_alloc(s, s->nb_globals + 1);
|
299 |
ts = &s->temps[s->nb_globals]; |
300 |
ts->base_type = type; |
301 |
ts->type = type; |
302 |
ts->fixed_reg = 1;
|
303 |
ts->reg = reg; |
304 |
ts->val_type = TEMP_VAL_REG; |
305 |
ts->name = name; |
306 |
s->nb_globals++; |
307 |
tcg_regset_set_reg(s->reserved_regs, reg); |
308 |
return MAKE_TCGV(idx);
|
309 |
} |
310 |
|
311 |
#if TCG_TARGET_REG_BITS == 32 |
312 |
/* temporary hack to avoid register shortage for tcg_qemu_st64() */
|
313 |
TCGv tcg_global_reg2_new_hack(TCGType type, int reg1, int reg2, |
314 |
const char *name) |
315 |
{ |
316 |
TCGContext *s = &tcg_ctx; |
317 |
TCGTemp *ts; |
318 |
int idx;
|
319 |
char buf[64]; |
320 |
|
321 |
if (type != TCG_TYPE_I64)
|
322 |
tcg_abort(); |
323 |
idx = s->nb_globals; |
324 |
tcg_temp_alloc(s, s->nb_globals + 2);
|
325 |
ts = &s->temps[s->nb_globals]; |
326 |
ts->base_type = type; |
327 |
ts->type = TCG_TYPE_I32; |
328 |
ts->fixed_reg = 1;
|
329 |
ts->reg = reg1; |
330 |
ts->val_type = TEMP_VAL_REG; |
331 |
pstrcpy(buf, sizeof(buf), name);
|
332 |
pstrcat(buf, sizeof(buf), "_0"); |
333 |
ts->name = strdup(buf); |
334 |
|
335 |
ts++; |
336 |
ts->base_type = type; |
337 |
ts->type = TCG_TYPE_I32; |
338 |
ts->fixed_reg = 1;
|
339 |
ts->reg = reg2; |
340 |
ts->val_type = TEMP_VAL_REG; |
341 |
pstrcpy(buf, sizeof(buf), name);
|
342 |
pstrcat(buf, sizeof(buf), "_1"); |
343 |
ts->name = strdup(buf); |
344 |
|
345 |
s->nb_globals += 2;
|
346 |
return MAKE_TCGV(idx);
|
347 |
} |
348 |
#endif
|
349 |
|
350 |
TCGv tcg_global_mem_new(TCGType type, int reg, tcg_target_long offset,
|
351 |
const char *name) |
352 |
{ |
353 |
TCGContext *s = &tcg_ctx; |
354 |
TCGTemp *ts; |
355 |
int idx;
|
356 |
|
357 |
idx = s->nb_globals; |
358 |
#if TCG_TARGET_REG_BITS == 32 |
359 |
if (type == TCG_TYPE_I64) {
|
360 |
char buf[64]; |
361 |
tcg_temp_alloc(s, s->nb_globals + 1);
|
362 |
ts = &s->temps[s->nb_globals]; |
363 |
ts->base_type = type; |
364 |
ts->type = TCG_TYPE_I32; |
365 |
ts->fixed_reg = 0;
|
366 |
ts->mem_allocated = 1;
|
367 |
ts->mem_reg = reg; |
368 |
#ifdef TCG_TARGET_WORDS_BIGENDIAN
|
369 |
ts->mem_offset = offset + 4;
|
370 |
#else
|
371 |
ts->mem_offset = offset; |
372 |
#endif
|
373 |
ts->val_type = TEMP_VAL_MEM; |
374 |
pstrcpy(buf, sizeof(buf), name);
|
375 |
pstrcat(buf, sizeof(buf), "_0"); |
376 |
ts->name = strdup(buf); |
377 |
ts++; |
378 |
|
379 |
ts->base_type = type; |
380 |
ts->type = TCG_TYPE_I32; |
381 |
ts->fixed_reg = 0;
|
382 |
ts->mem_allocated = 1;
|
383 |
ts->mem_reg = reg; |
384 |
#ifdef TCG_TARGET_WORDS_BIGENDIAN
|
385 |
ts->mem_offset = offset; |
386 |
#else
|
387 |
ts->mem_offset = offset + 4;
|
388 |
#endif
|
389 |
ts->val_type = TEMP_VAL_MEM; |
390 |
pstrcpy(buf, sizeof(buf), name);
|
391 |
pstrcat(buf, sizeof(buf), "_1"); |
392 |
ts->name = strdup(buf); |
393 |
|
394 |
s->nb_globals += 2;
|
395 |
} else
|
396 |
#endif
|
397 |
{ |
398 |
tcg_temp_alloc(s, s->nb_globals + 1);
|
399 |
ts = &s->temps[s->nb_globals]; |
400 |
ts->base_type = type; |
401 |
ts->type = type; |
402 |
ts->fixed_reg = 0;
|
403 |
ts->mem_allocated = 1;
|
404 |
ts->mem_reg = reg; |
405 |
ts->mem_offset = offset; |
406 |
ts->val_type = TEMP_VAL_MEM; |
407 |
ts->name = name; |
408 |
s->nb_globals++; |
409 |
} |
410 |
return MAKE_TCGV(idx);
|
411 |
} |
412 |
|
413 |
TCGv tcg_temp_new(TCGType type) |
414 |
{ |
415 |
TCGContext *s = &tcg_ctx; |
416 |
TCGTemp *ts; |
417 |
int idx;
|
418 |
|
419 |
idx = s->nb_temps; |
420 |
#if TCG_TARGET_REG_BITS == 32 |
421 |
if (type == TCG_TYPE_I64) {
|
422 |
tcg_temp_alloc(s, s->nb_temps + 1);
|
423 |
ts = &s->temps[s->nb_temps]; |
424 |
ts->base_type = type; |
425 |
ts->type = TCG_TYPE_I32; |
426 |
ts->fixed_reg = 0;
|
427 |
ts->val_type = TEMP_VAL_DEAD; |
428 |
ts->mem_allocated = 0;
|
429 |
ts->name = NULL;
|
430 |
ts++; |
431 |
ts->base_type = TCG_TYPE_I32; |
432 |
ts->type = TCG_TYPE_I32; |
433 |
ts->val_type = TEMP_VAL_DEAD; |
434 |
ts->fixed_reg = 0;
|
435 |
ts->mem_allocated = 0;
|
436 |
ts->name = NULL;
|
437 |
s->nb_temps += 2;
|
438 |
} else
|
439 |
#endif
|
440 |
{ |
441 |
tcg_temp_alloc(s, s->nb_temps + 1);
|
442 |
ts = &s->temps[s->nb_temps]; |
443 |
ts->base_type = type; |
444 |
ts->type = type; |
445 |
ts->fixed_reg = 0;
|
446 |
ts->val_type = TEMP_VAL_DEAD; |
447 |
ts->mem_allocated = 0;
|
448 |
ts->name = NULL;
|
449 |
s->nb_temps++; |
450 |
} |
451 |
return MAKE_TCGV(idx);
|
452 |
} |
453 |
|
454 |
TCGv tcg_const_i32(int32_t val) |
455 |
{ |
456 |
TCGContext *s = &tcg_ctx; |
457 |
TCGTemp *ts; |
458 |
int idx;
|
459 |
|
460 |
idx = s->nb_temps; |
461 |
tcg_temp_alloc(s, idx + 1);
|
462 |
ts = &s->temps[idx]; |
463 |
ts->base_type = ts->type = TCG_TYPE_I32; |
464 |
ts->val_type = TEMP_VAL_CONST; |
465 |
ts->name = NULL;
|
466 |
ts->val = val; |
467 |
s->nb_temps++; |
468 |
return MAKE_TCGV(idx);
|
469 |
} |
470 |
|
471 |
TCGv tcg_const_i64(int64_t val) |
472 |
{ |
473 |
TCGContext *s = &tcg_ctx; |
474 |
TCGTemp *ts; |
475 |
int idx;
|
476 |
|
477 |
idx = s->nb_temps; |
478 |
#if TCG_TARGET_REG_BITS == 32 |
479 |
tcg_temp_alloc(s, idx + 2);
|
480 |
ts = &s->temps[idx]; |
481 |
ts->base_type = TCG_TYPE_I64; |
482 |
ts->type = TCG_TYPE_I32; |
483 |
ts->val_type = TEMP_VAL_CONST; |
484 |
ts->name = NULL;
|
485 |
ts->val = val; |
486 |
ts++; |
487 |
ts->base_type = TCG_TYPE_I32; |
488 |
ts->type = TCG_TYPE_I32; |
489 |
ts->val_type = TEMP_VAL_CONST; |
490 |
ts->name = NULL;
|
491 |
ts->val = val >> 32;
|
492 |
s->nb_temps += 2;
|
493 |
#else
|
494 |
tcg_temp_alloc(s, idx + 1);
|
495 |
ts = &s->temps[idx]; |
496 |
ts->base_type = ts->type = TCG_TYPE_I64; |
497 |
ts->val_type = TEMP_VAL_CONST; |
498 |
ts->name = NULL;
|
499 |
ts->val = val; |
500 |
s->nb_temps++; |
501 |
#endif
|
502 |
return MAKE_TCGV(idx);
|
503 |
} |
504 |
|
505 |
void tcg_register_helper(void *func, const char *name) |
506 |
{ |
507 |
TCGContext *s = &tcg_ctx; |
508 |
int n;
|
509 |
if ((s->nb_helpers + 1) > s->allocated_helpers) { |
510 |
n = s->allocated_helpers; |
511 |
if (n == 0) { |
512 |
n = 4;
|
513 |
} else {
|
514 |
n *= 2;
|
515 |
} |
516 |
s->helpers = realloc(s->helpers, n * sizeof(TCGHelperInfo));
|
517 |
s->allocated_helpers = n; |
518 |
} |
519 |
s->helpers[s->nb_helpers].func = func; |
520 |
s->helpers[s->nb_helpers].name = name; |
521 |
s->nb_helpers++; |
522 |
} |
523 |
|
524 |
const char *tcg_helper_get_name(TCGContext *s, void *func) |
525 |
{ |
526 |
int i;
|
527 |
|
528 |
for(i = 0; i < s->nb_helpers; i++) { |
529 |
if (s->helpers[i].func == func)
|
530 |
return s->helpers[i].name;
|
531 |
} |
532 |
return NULL; |
533 |
} |
534 |
|
535 |
static inline TCGType tcg_get_base_type(TCGContext *s, TCGv arg) |
536 |
{ |
537 |
return s->temps[GET_TCGV(arg)].base_type;
|
538 |
} |
539 |
|
540 |
static void tcg_gen_call_internal(TCGContext *s, TCGv func, |
541 |
unsigned int flags, |
542 |
unsigned int nb_rets, const TCGv *rets, |
543 |
unsigned int nb_params, const TCGv *params) |
544 |
{ |
545 |
int i;
|
546 |
*gen_opc_ptr++ = INDEX_op_call; |
547 |
*gen_opparam_ptr++ = (nb_rets << 16) | (nb_params + 1); |
548 |
for(i = 0; i < nb_rets; i++) { |
549 |
*gen_opparam_ptr++ = GET_TCGV(rets[i]); |
550 |
} |
551 |
for(i = 0; i < nb_params; i++) { |
552 |
*gen_opparam_ptr++ = GET_TCGV(params[i]); |
553 |
} |
554 |
*gen_opparam_ptr++ = GET_TCGV(func); |
555 |
|
556 |
*gen_opparam_ptr++ = flags; |
557 |
/* total parameters, needed to go backward in the instruction stream */
|
558 |
*gen_opparam_ptr++ = 1 + nb_rets + nb_params + 3; |
559 |
} |
560 |
|
561 |
|
562 |
#if TCG_TARGET_REG_BITS < 64 |
563 |
/* Note: we convert the 64 bit args to 32 bit */
|
564 |
void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags, |
565 |
unsigned int nb_rets, const TCGv *rets, |
566 |
unsigned int nb_params, const TCGv *args1) |
567 |
{ |
568 |
TCGv ret, *args2, rets_2[2], arg;
|
569 |
int j, i, call_type;
|
570 |
|
571 |
if (nb_rets == 1) { |
572 |
ret = rets[0];
|
573 |
if (tcg_get_base_type(s, ret) == TCG_TYPE_I64) {
|
574 |
nb_rets = 2;
|
575 |
rets_2[0] = ret;
|
576 |
rets_2[1] = TCGV_HIGH(ret);
|
577 |
rets = rets_2; |
578 |
} |
579 |
} |
580 |
args2 = alloca((nb_params * 2) * sizeof(TCGv)); |
581 |
j = 0;
|
582 |
call_type = (flags & TCG_CALL_TYPE_MASK); |
583 |
for(i = 0; i < nb_params; i++) { |
584 |
arg = args1[i]; |
585 |
if (tcg_get_base_type(s, arg) == TCG_TYPE_I64) {
|
586 |
#ifdef TCG_TARGET_I386
|
587 |
/* REGPARM case: if the third parameter is 64 bit, it is
|
588 |
allocated on the stack */
|
589 |
if (j == 2 && call_type == TCG_CALL_TYPE_REGPARM) { |
590 |
call_type = TCG_CALL_TYPE_REGPARM_2; |
591 |
flags = (flags & ~TCG_CALL_TYPE_MASK) | call_type; |
592 |
} |
593 |
args2[j++] = arg; |
594 |
args2[j++] = TCGV_HIGH(arg); |
595 |
#else
|
596 |
#ifdef TCG_TARGET_WORDS_BIGENDIAN
|
597 |
args2[j++] = TCGV_HIGH(arg); |
598 |
args2[j++] = arg; |
599 |
#else
|
600 |
args2[j++] = arg; |
601 |
args2[j++] = TCGV_HIGH(arg); |
602 |
#endif
|
603 |
#endif
|
604 |
} else {
|
605 |
args2[j++] = arg; |
606 |
} |
607 |
} |
608 |
tcg_gen_call_internal(s, func, flags, |
609 |
nb_rets, rets, j, args2); |
610 |
} |
611 |
#else
|
612 |
void tcg_gen_call(TCGContext *s, TCGv func, unsigned int flags, |
613 |
unsigned int nb_rets, const TCGv *rets, |
614 |
unsigned int nb_params, const TCGv *args1) |
615 |
{ |
616 |
tcg_gen_call_internal(s, func, flags, |
617 |
nb_rets, rets, nb_params, args1); |
618 |
} |
619 |
#endif
|
620 |
|
621 |
#if TCG_TARGET_REG_BITS == 32 |
622 |
void tcg_gen_shifti_i64(TCGv ret, TCGv arg1,
|
623 |
int c, int right, int arith) |
624 |
{ |
625 |
if (c == 0) |
626 |
return;
|
627 |
if (c >= 32) { |
628 |
c -= 32;
|
629 |
if (right) {
|
630 |
if (arith) {
|
631 |
tcg_gen_sari_i32(ret, TCGV_HIGH(arg1), c); |
632 |
tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), 31);
|
633 |
} else {
|
634 |
tcg_gen_shri_i32(ret, TCGV_HIGH(arg1), c); |
635 |
tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
|
636 |
} |
637 |
} else {
|
638 |
tcg_gen_shli_i32(TCGV_HIGH(ret), arg1, c); |
639 |
tcg_gen_movi_i32(ret, 0);
|
640 |
} |
641 |
} else {
|
642 |
TCGv t0, t1; |
643 |
|
644 |
t0 = tcg_temp_new(TCG_TYPE_I32); |
645 |
t1 = tcg_temp_new(TCG_TYPE_I32); |
646 |
if (right) {
|
647 |
tcg_gen_shli_i32(t0, TCGV_HIGH(arg1), 32 - c);
|
648 |
if (arith)
|
649 |
tcg_gen_sari_i32(t1, TCGV_HIGH(arg1), c); |
650 |
else
|
651 |
tcg_gen_shri_i32(t1, TCGV_HIGH(arg1), c); |
652 |
tcg_gen_shri_i32(ret, arg1, c); |
653 |
tcg_gen_or_i32(ret, ret, t0); |
654 |
tcg_gen_mov_i32(TCGV_HIGH(ret), t1); |
655 |
} else {
|
656 |
tcg_gen_shri_i32(t0, arg1, 32 - c);
|
657 |
/* Note: ret can be the same as arg1, so we use t1 */
|
658 |
tcg_gen_shli_i32(t1, arg1, c); |
659 |
tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), c); |
660 |
tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(ret), t0); |
661 |
tcg_gen_mov_i32(ret, t1); |
662 |
} |
663 |
} |
664 |
} |
665 |
#endif
|
666 |
|
667 |
void tcg_reg_alloc_start(TCGContext *s)
|
668 |
{ |
669 |
int i;
|
670 |
TCGTemp *ts; |
671 |
for(i = 0; i < s->nb_globals; i++) { |
672 |
ts = &s->temps[i]; |
673 |
if (ts->fixed_reg) {
|
674 |
ts->val_type = TEMP_VAL_REG; |
675 |
} else {
|
676 |
ts->val_type = TEMP_VAL_MEM; |
677 |
} |
678 |
} |
679 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
680 |
s->reg_to_temp[i] = -1;
|
681 |
} |
682 |
} |
683 |
|
684 |
static char *tcg_get_arg_str_idx(TCGContext *s, char *buf, int buf_size, |
685 |
int idx)
|
686 |
{ |
687 |
TCGTemp *ts; |
688 |
|
689 |
ts = &s->temps[idx]; |
690 |
if (idx < s->nb_globals) {
|
691 |
pstrcpy(buf, buf_size, ts->name); |
692 |
} else {
|
693 |
if (ts->val_type == TEMP_VAL_CONST) {
|
694 |
snprintf(buf, buf_size, "$0x%" TCG_PRIlx , ts->val);
|
695 |
} else {
|
696 |
snprintf(buf, buf_size, "tmp%d", idx - s->nb_globals);
|
697 |
} |
698 |
} |
699 |
return buf;
|
700 |
} |
701 |
|
702 |
char *tcg_get_arg_str(TCGContext *s, char *buf, int buf_size, TCGv arg) |
703 |
{ |
704 |
return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV(arg));
|
705 |
} |
706 |
|
707 |
void tcg_dump_ops(TCGContext *s, FILE *outfile)
|
708 |
{ |
709 |
const uint16_t *opc_ptr;
|
710 |
const TCGArg *args;
|
711 |
TCGArg arg; |
712 |
int c, i, k, nb_oargs, nb_iargs, nb_cargs;
|
713 |
const TCGOpDef *def;
|
714 |
char buf[128]; |
715 |
|
716 |
opc_ptr = gen_opc_buf; |
717 |
args = gen_opparam_buf; |
718 |
while (opc_ptr < gen_opc_ptr) {
|
719 |
c = *opc_ptr++; |
720 |
def = &tcg_op_defs[c]; |
721 |
fprintf(outfile, " %s ", def->name);
|
722 |
if (c == INDEX_op_call) {
|
723 |
TCGArg arg; |
724 |
/* variable number of arguments */
|
725 |
arg = *args++; |
726 |
nb_oargs = arg >> 16;
|
727 |
nb_iargs = arg & 0xffff;
|
728 |
nb_cargs = def->nb_cargs; |
729 |
|
730 |
/* function name */
|
731 |
/* XXX: dump helper name for call */
|
732 |
fprintf(outfile, "%s",
|
733 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + nb_iargs - 1])); |
734 |
/* flags */
|
735 |
fprintf(outfile, ",$0x%" TCG_PRIlx,
|
736 |
args[nb_oargs + nb_iargs]); |
737 |
/* nb out args */
|
738 |
fprintf(outfile, ",$%d", nb_oargs);
|
739 |
for(i = 0; i < nb_oargs; i++) { |
740 |
fprintf(outfile, ",");
|
741 |
fprintf(outfile, "%s",
|
742 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[i]));
|
743 |
} |
744 |
for(i = 0; i < (nb_iargs - 1); i++) { |
745 |
fprintf(outfile, ",");
|
746 |
fprintf(outfile, "%s",
|
747 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + i]));
|
748 |
} |
749 |
} else {
|
750 |
if (c == INDEX_op_nopn) {
|
751 |
/* variable number of arguments */
|
752 |
nb_cargs = *args; |
753 |
nb_oargs = 0;
|
754 |
nb_iargs = 0;
|
755 |
} else {
|
756 |
nb_oargs = def->nb_oargs; |
757 |
nb_iargs = def->nb_iargs; |
758 |
nb_cargs = def->nb_cargs; |
759 |
} |
760 |
|
761 |
k = 0;
|
762 |
for(i = 0; i < nb_oargs; i++) { |
763 |
if (k != 0) |
764 |
fprintf(outfile, ",");
|
765 |
fprintf(outfile, "%s",
|
766 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
|
767 |
} |
768 |
for(i = 0; i < nb_iargs; i++) { |
769 |
if (k != 0) |
770 |
fprintf(outfile, ",");
|
771 |
fprintf(outfile, "%s",
|
772 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
|
773 |
} |
774 |
for(i = 0; i < nb_cargs; i++) { |
775 |
if (k != 0) |
776 |
fprintf(outfile, ",");
|
777 |
arg = args[k++]; |
778 |
fprintf(outfile, "$0x%" TCG_PRIlx, arg);
|
779 |
} |
780 |
} |
781 |
fprintf(outfile, "\n");
|
782 |
args += nb_iargs + nb_oargs + nb_cargs; |
783 |
} |
784 |
} |
785 |
|
786 |
/* we give more priority to constraints with less registers */
|
787 |
static int get_constraint_priority(const TCGOpDef *def, int k) |
788 |
{ |
789 |
const TCGArgConstraint *arg_ct;
|
790 |
|
791 |
int i, n;
|
792 |
arg_ct = &def->args_ct[k]; |
793 |
if (arg_ct->ct & TCG_CT_ALIAS) {
|
794 |
/* an alias is equivalent to a single register */
|
795 |
n = 1;
|
796 |
} else {
|
797 |
if (!(arg_ct->ct & TCG_CT_REG))
|
798 |
return 0; |
799 |
n = 0;
|
800 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
801 |
if (tcg_regset_test_reg(arg_ct->u.regs, i))
|
802 |
n++; |
803 |
} |
804 |
} |
805 |
return TCG_TARGET_NB_REGS - n + 1; |
806 |
} |
807 |
|
808 |
/* sort from highest priority to lowest */
|
809 |
static void sort_constraints(TCGOpDef *def, int start, int n) |
810 |
{ |
811 |
int i, j, p1, p2, tmp;
|
812 |
|
813 |
for(i = 0; i < n; i++) |
814 |
def->sorted_args[start + i] = start + i; |
815 |
if (n <= 1) |
816 |
return;
|
817 |
for(i = 0; i < n - 1; i++) { |
818 |
for(j = i + 1; j < n; j++) { |
819 |
p1 = get_constraint_priority(def, def->sorted_args[start + i]); |
820 |
p2 = get_constraint_priority(def, def->sorted_args[start + j]); |
821 |
if (p1 < p2) {
|
822 |
tmp = def->sorted_args[start + i]; |
823 |
def->sorted_args[start + i] = def->sorted_args[start + j]; |
824 |
def->sorted_args[start + j] = tmp; |
825 |
} |
826 |
} |
827 |
} |
828 |
} |
829 |
|
830 |
void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs) |
831 |
{ |
832 |
int op;
|
833 |
TCGOpDef *def; |
834 |
const char *ct_str; |
835 |
int i, nb_args;
|
836 |
|
837 |
for(;;) {
|
838 |
if (tdefs->op < 0) |
839 |
break;
|
840 |
op = tdefs->op; |
841 |
assert(op >= 0 && op < NB_OPS);
|
842 |
def = &tcg_op_defs[op]; |
843 |
nb_args = def->nb_iargs + def->nb_oargs; |
844 |
for(i = 0; i < nb_args; i++) { |
845 |
ct_str = tdefs->args_ct_str[i]; |
846 |
tcg_regset_clear(def->args_ct[i].u.regs); |
847 |
def->args_ct[i].ct = 0;
|
848 |
if (ct_str[0] >= '0' && ct_str[0] <= '9') { |
849 |
int oarg;
|
850 |
oarg = ct_str[0] - '0'; |
851 |
assert(oarg < def->nb_oargs); |
852 |
assert(def->args_ct[oarg].ct & TCG_CT_REG); |
853 |
/* TCG_CT_ALIAS is for the output arguments. The input
|
854 |
argument is tagged with TCG_CT_IALIAS. */
|
855 |
def->args_ct[i] = def->args_ct[oarg]; |
856 |
def->args_ct[oarg].ct = TCG_CT_ALIAS; |
857 |
def->args_ct[oarg].alias_index = i; |
858 |
def->args_ct[i].ct |= TCG_CT_IALIAS; |
859 |
def->args_ct[i].alias_index = oarg; |
860 |
} else {
|
861 |
for(;;) {
|
862 |
if (*ct_str == '\0') |
863 |
break;
|
864 |
switch(*ct_str) {
|
865 |
case 'i': |
866 |
def->args_ct[i].ct |= TCG_CT_CONST; |
867 |
ct_str++; |
868 |
break;
|
869 |
default:
|
870 |
if (target_parse_constraint(&def->args_ct[i], &ct_str) < 0) { |
871 |
fprintf(stderr, "Invalid constraint '%s' for arg %d of operation '%s'\n",
|
872 |
ct_str, i, def->name); |
873 |
exit(1);
|
874 |
} |
875 |
} |
876 |
} |
877 |
} |
878 |
} |
879 |
|
880 |
/* sort the constraints (XXX: this is just an heuristic) */
|
881 |
sort_constraints(def, 0, def->nb_oargs);
|
882 |
sort_constraints(def, def->nb_oargs, def->nb_iargs); |
883 |
|
884 |
#if 0
|
885 |
{
|
886 |
int i;
|
887 |
|
888 |
printf("%s: sorted=", def->name);
|
889 |
for(i = 0; i < def->nb_oargs + def->nb_iargs; i++)
|
890 |
printf(" %d", def->sorted_args[i]);
|
891 |
printf("\n");
|
892 |
}
|
893 |
#endif
|
894 |
tdefs++; |
895 |
} |
896 |
|
897 |
} |
898 |
|
899 |
#ifdef USE_LIVENESS_ANALYSIS
|
900 |
|
901 |
/* set a nop for an operation using 'nb_args' */
|
902 |
static inline void tcg_set_nop(TCGContext *s, uint16_t *opc_ptr, |
903 |
TCGArg *args, int nb_args)
|
904 |
{ |
905 |
if (nb_args == 0) { |
906 |
*opc_ptr = INDEX_op_nop; |
907 |
} else {
|
908 |
*opc_ptr = INDEX_op_nopn; |
909 |
args[0] = nb_args;
|
910 |
args[nb_args - 1] = nb_args;
|
911 |
} |
912 |
} |
913 |
|
914 |
/* liveness analysis: end of basic block: globals are live, temps are dead */
|
915 |
static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps) |
916 |
{ |
917 |
memset(dead_temps, 0, s->nb_globals);
|
918 |
memset(dead_temps + s->nb_globals, 1, s->nb_temps - s->nb_globals);
|
919 |
} |
920 |
|
921 |
/* Liveness analysis : update the opc_dead_iargs array to tell if a
|
922 |
given input arguments is dead. Instructions updating dead
|
923 |
temporaries are removed. */
|
924 |
void tcg_liveness_analysis(TCGContext *s)
|
925 |
{ |
926 |
int i, op_index, op, nb_args, nb_iargs, nb_oargs, arg, nb_ops;
|
927 |
TCGArg *args; |
928 |
const TCGOpDef *def;
|
929 |
uint8_t *dead_temps; |
930 |
unsigned int dead_iargs; |
931 |
|
932 |
gen_opc_ptr++; /* skip end */
|
933 |
|
934 |
nb_ops = gen_opc_ptr - gen_opc_buf; |
935 |
|
936 |
/* XXX: make it really dynamic */
|
937 |
s->op_dead_iargs = tcg_malloc(OPC_BUF_SIZE * sizeof(uint16_t));
|
938 |
|
939 |
dead_temps = tcg_malloc(s->nb_temps); |
940 |
memset(dead_temps, 1, s->nb_temps);
|
941 |
|
942 |
args = gen_opparam_ptr; |
943 |
op_index = nb_ops - 1;
|
944 |
while (op_index >= 0) { |
945 |
op = gen_opc_buf[op_index]; |
946 |
def = &tcg_op_defs[op]; |
947 |
switch(op) {
|
948 |
case INDEX_op_call:
|
949 |
nb_args = args[-1];
|
950 |
args -= nb_args; |
951 |
nb_iargs = args[0] & 0xffff; |
952 |
nb_oargs = args[0] >> 16; |
953 |
args++; |
954 |
|
955 |
/* output args are dead */
|
956 |
for(i = 0; i < nb_oargs; i++) { |
957 |
arg = args[i]; |
958 |
dead_temps[arg] = 1;
|
959 |
} |
960 |
|
961 |
/* globals are live (they may be used by the call) */
|
962 |
memset(dead_temps, 0, s->nb_globals);
|
963 |
|
964 |
/* input args are live */
|
965 |
dead_iargs = 0;
|
966 |
for(i = 0; i < nb_iargs; i++) { |
967 |
arg = args[i + nb_oargs]; |
968 |
if (dead_temps[arg]) {
|
969 |
dead_iargs |= (1 << i);
|
970 |
} |
971 |
dead_temps[arg] = 0;
|
972 |
} |
973 |
s->op_dead_iargs[op_index] = dead_iargs; |
974 |
args--; |
975 |
break;
|
976 |
case INDEX_op_set_label:
|
977 |
args--; |
978 |
/* mark end of basic block */
|
979 |
tcg_la_bb_end(s, dead_temps); |
980 |
break;
|
981 |
case INDEX_op_nopn:
|
982 |
nb_args = args[-1];
|
983 |
args -= nb_args; |
984 |
break;
|
985 |
case INDEX_op_discard:
|
986 |
args--; |
987 |
/* mark the temporary as dead */
|
988 |
dead_temps[args[0]] = 1; |
989 |
break;
|
990 |
case INDEX_op_macro_2:
|
991 |
{ |
992 |
int dead_args[2], macro_id; |
993 |
int saved_op_index, saved_arg_index;
|
994 |
int macro_op_index, macro_arg_index;
|
995 |
int macro_end_op_index, macro_end_arg_index;
|
996 |
int last_nb_temps;
|
997 |
|
998 |
nb_args = 3;
|
999 |
args -= nb_args; |
1000 |
dead_args[0] = dead_temps[args[0]]; |
1001 |
dead_args[1] = dead_temps[args[1]]; |
1002 |
macro_id = args[2];
|
1003 |
|
1004 |
/* call the macro function which generate code
|
1005 |
depending on the live outputs */
|
1006 |
saved_op_index = op_index; |
1007 |
saved_arg_index = args - gen_opparam_buf; |
1008 |
|
1009 |
/* add a macro start instruction */
|
1010 |
*gen_opc_ptr++ = INDEX_op_macro_start; |
1011 |
*gen_opparam_ptr++ = saved_op_index; |
1012 |
*gen_opparam_ptr++ = saved_arg_index; |
1013 |
|
1014 |
macro_op_index = gen_opc_ptr - gen_opc_buf; |
1015 |
macro_arg_index = gen_opparam_ptr - gen_opparam_buf; |
1016 |
|
1017 |
last_nb_temps = s->nb_temps; |
1018 |
|
1019 |
s->macro_func(s, macro_id, dead_args); |
1020 |
|
1021 |
/* realloc temp info (XXX: make it faster) */
|
1022 |
if (s->nb_temps > last_nb_temps) {
|
1023 |
uint8_t *new_dead_temps; |
1024 |
|
1025 |
new_dead_temps = tcg_malloc(s->nb_temps); |
1026 |
memcpy(new_dead_temps, dead_temps, last_nb_temps); |
1027 |
memset(new_dead_temps + last_nb_temps, 1,
|
1028 |
s->nb_temps - last_nb_temps); |
1029 |
dead_temps = new_dead_temps; |
1030 |
} |
1031 |
|
1032 |
macro_end_op_index = gen_opc_ptr - gen_opc_buf; |
1033 |
macro_end_arg_index = gen_opparam_ptr - gen_opparam_buf; |
1034 |
|
1035 |
/* end of macro: add a goto to the next instruction */
|
1036 |
*gen_opc_ptr++ = INDEX_op_macro_end; |
1037 |
*gen_opparam_ptr++ = op_index + 1;
|
1038 |
*gen_opparam_ptr++ = saved_arg_index + nb_args; |
1039 |
|
1040 |
/* modify the macro operation to be a macro_goto */
|
1041 |
gen_opc_buf[op_index] = INDEX_op_macro_goto; |
1042 |
args[0] = macro_op_index;
|
1043 |
args[1] = macro_arg_index;
|
1044 |
args[2] = 0; /* dummy third arg to match the |
1045 |
macro parameters */
|
1046 |
|
1047 |
/* set the next instruction to the end of the macro */
|
1048 |
op_index = macro_end_op_index; |
1049 |
args = macro_end_arg_index + gen_opparam_buf; |
1050 |
} |
1051 |
break;
|
1052 |
case INDEX_op_macro_start:
|
1053 |
args -= 2;
|
1054 |
op_index = args[0];
|
1055 |
args = gen_opparam_buf + args[1];
|
1056 |
break;
|
1057 |
case INDEX_op_macro_goto:
|
1058 |
case INDEX_op_macro_end:
|
1059 |
tcg_abort(); /* should never happen in liveness analysis */
|
1060 |
case INDEX_op_end:
|
1061 |
break;
|
1062 |
/* XXX: optimize by hardcoding common cases (e.g. triadic ops) */
|
1063 |
default:
|
1064 |
if (op > INDEX_op_end) {
|
1065 |
args -= def->nb_args; |
1066 |
nb_iargs = def->nb_iargs; |
1067 |
nb_oargs = def->nb_oargs; |
1068 |
|
1069 |
/* Test if the operation can be removed because all
|
1070 |
its outputs are dead. We assume that nb_oargs == 0
|
1071 |
implies side effects */
|
1072 |
if (!(def->flags & TCG_OPF_SIDE_EFFECTS) && nb_oargs != 0) { |
1073 |
for(i = 0; i < nb_oargs; i++) { |
1074 |
arg = args[i]; |
1075 |
if (!dead_temps[arg])
|
1076 |
goto do_not_remove;
|
1077 |
} |
1078 |
tcg_set_nop(s, gen_opc_buf + op_index, args, def->nb_args); |
1079 |
#ifdef CONFIG_PROFILER
|
1080 |
{ |
1081 |
extern int64_t dyngen_tcg_del_op_count;
|
1082 |
dyngen_tcg_del_op_count++; |
1083 |
} |
1084 |
#endif
|
1085 |
} else {
|
1086 |
do_not_remove:
|
1087 |
|
1088 |
/* output args are dead */
|
1089 |
for(i = 0; i < nb_oargs; i++) { |
1090 |
arg = args[i]; |
1091 |
dead_temps[arg] = 1;
|
1092 |
} |
1093 |
|
1094 |
/* if end of basic block, update */
|
1095 |
if (def->flags & TCG_OPF_BB_END) {
|
1096 |
tcg_la_bb_end(s, dead_temps); |
1097 |
} else if (def->flags & TCG_OPF_CALL_CLOBBER) { |
1098 |
/* globals are live */
|
1099 |
memset(dead_temps, 0, s->nb_globals);
|
1100 |
} |
1101 |
|
1102 |
/* input args are live */
|
1103 |
dead_iargs = 0;
|
1104 |
for(i = 0; i < nb_iargs; i++) { |
1105 |
arg = args[i + nb_oargs]; |
1106 |
if (dead_temps[arg]) {
|
1107 |
dead_iargs |= (1 << i);
|
1108 |
} |
1109 |
dead_temps[arg] = 0;
|
1110 |
} |
1111 |
s->op_dead_iargs[op_index] = dead_iargs; |
1112 |
} |
1113 |
} else {
|
1114 |
/* legacy dyngen operations */
|
1115 |
args -= def->nb_args; |
1116 |
/* mark end of basic block */
|
1117 |
tcg_la_bb_end(s, dead_temps); |
1118 |
} |
1119 |
break;
|
1120 |
} |
1121 |
op_index--; |
1122 |
} |
1123 |
|
1124 |
if (args != gen_opparam_buf)
|
1125 |
tcg_abort(); |
1126 |
} |
1127 |
#else
|
1128 |
/* dummy liveness analysis */
|
1129 |
void tcg_liveness_analysis(TCGContext *s)
|
1130 |
{ |
1131 |
int nb_ops;
|
1132 |
nb_ops = gen_opc_ptr - gen_opc_buf; |
1133 |
|
1134 |
s->op_dead_iargs = tcg_malloc(nb_ops * sizeof(uint16_t));
|
1135 |
memset(s->op_dead_iargs, 0, nb_ops * sizeof(uint16_t)); |
1136 |
} |
1137 |
#endif
|
1138 |
|
1139 |
#ifndef NDEBUG
|
1140 |
static void dump_regs(TCGContext *s) |
1141 |
{ |
1142 |
TCGTemp *ts; |
1143 |
int i;
|
1144 |
char buf[64]; |
1145 |
|
1146 |
for(i = 0; i < s->nb_temps; i++) { |
1147 |
ts = &s->temps[i]; |
1148 |
printf(" %10s: ", tcg_get_arg_str_idx(s, buf, sizeof(buf), i)); |
1149 |
switch(ts->val_type) {
|
1150 |
case TEMP_VAL_REG:
|
1151 |
printf("%s", tcg_target_reg_names[ts->reg]);
|
1152 |
break;
|
1153 |
case TEMP_VAL_MEM:
|
1154 |
printf("%d(%s)", (int)ts->mem_offset, tcg_target_reg_names[ts->mem_reg]); |
1155 |
break;
|
1156 |
case TEMP_VAL_CONST:
|
1157 |
printf("$0x%" TCG_PRIlx, ts->val);
|
1158 |
break;
|
1159 |
case TEMP_VAL_DEAD:
|
1160 |
printf("D");
|
1161 |
break;
|
1162 |
default:
|
1163 |
printf("???");
|
1164 |
break;
|
1165 |
} |
1166 |
printf("\n");
|
1167 |
} |
1168 |
|
1169 |
for(i = 0; i < TCG_TARGET_NB_REGS; i++) { |
1170 |
if (s->reg_to_temp[i] >= 0) { |
1171 |
printf("%s: %s\n",
|
1172 |
tcg_target_reg_names[i], |
1173 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), s->reg_to_temp[i]));
|
1174 |
} |
1175 |
} |
1176 |
} |
1177 |
|
1178 |
static void check_regs(TCGContext *s) |
1179 |
{ |
1180 |
int reg, k;
|
1181 |
TCGTemp *ts; |
1182 |
char buf[64]; |
1183 |
|
1184 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1185 |
k = s->reg_to_temp[reg]; |
1186 |
if (k >= 0) { |
1187 |
ts = &s->temps[k]; |
1188 |
if (ts->val_type != TEMP_VAL_REG ||
|
1189 |
ts->reg != reg) { |
1190 |
printf("Inconsistency for register %s:\n",
|
1191 |
tcg_target_reg_names[reg]); |
1192 |
goto fail;
|
1193 |
} |
1194 |
} |
1195 |
} |
1196 |
for(k = 0; k < s->nb_temps; k++) { |
1197 |
ts = &s->temps[k]; |
1198 |
if (ts->val_type == TEMP_VAL_REG &&
|
1199 |
!ts->fixed_reg && |
1200 |
s->reg_to_temp[ts->reg] != k) { |
1201 |
printf("Inconsistency for temp %s:\n",
|
1202 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), k));
|
1203 |
fail:
|
1204 |
printf("reg state:\n");
|
1205 |
dump_regs(s); |
1206 |
tcg_abort(); |
1207 |
} |
1208 |
if (ts->val_type == TEMP_VAL_CONST && k < s->nb_globals) {
|
1209 |
printf("constant forbidden in global %s\n",
|
1210 |
tcg_get_arg_str_idx(s, buf, sizeof(buf), k));
|
1211 |
goto fail;
|
1212 |
} |
1213 |
} |
1214 |
} |
1215 |
#endif
|
1216 |
|
1217 |
static void temp_allocate_frame(TCGContext *s, int temp) |
1218 |
{ |
1219 |
TCGTemp *ts; |
1220 |
ts = &s->temps[temp]; |
1221 |
s->current_frame_offset = (s->current_frame_offset + sizeof(tcg_target_long) - 1) & ~(sizeof(tcg_target_long) - 1); |
1222 |
if (s->current_frame_offset + sizeof(tcg_target_long) > s->frame_end) |
1223 |
tcg_abort(); |
1224 |
ts->mem_offset = s->current_frame_offset; |
1225 |
ts->mem_reg = s->frame_reg; |
1226 |
ts->mem_allocated = 1;
|
1227 |
s->current_frame_offset += sizeof(tcg_target_long);
|
1228 |
} |
1229 |
|
1230 |
/* free register 'reg' by spilling the corresponding temporary if necessary */
|
1231 |
static void tcg_reg_free(TCGContext *s, int reg) |
1232 |
{ |
1233 |
TCGTemp *ts; |
1234 |
int temp;
|
1235 |
|
1236 |
temp = s->reg_to_temp[reg]; |
1237 |
if (temp != -1) { |
1238 |
ts = &s->temps[temp]; |
1239 |
assert(ts->val_type == TEMP_VAL_REG); |
1240 |
if (!ts->mem_coherent) {
|
1241 |
if (!ts->mem_allocated)
|
1242 |
temp_allocate_frame(s, temp); |
1243 |
tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1244 |
} |
1245 |
ts->val_type = TEMP_VAL_MEM; |
1246 |
s->reg_to_temp[reg] = -1;
|
1247 |
} |
1248 |
} |
1249 |
|
1250 |
/* Allocate a register belonging to reg1 & ~reg2 */
|
1251 |
static int tcg_reg_alloc(TCGContext *s, TCGRegSet reg1, TCGRegSet reg2) |
1252 |
{ |
1253 |
int i, reg;
|
1254 |
TCGRegSet reg_ct; |
1255 |
|
1256 |
tcg_regset_andnot(reg_ct, reg1, reg2); |
1257 |
|
1258 |
/* first try free registers */
|
1259 |
for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) { |
1260 |
reg = tcg_target_reg_alloc_order[i]; |
1261 |
if (tcg_regset_test_reg(reg_ct, reg) && s->reg_to_temp[reg] == -1) |
1262 |
return reg;
|
1263 |
} |
1264 |
|
1265 |
/* XXX: do better spill choice */
|
1266 |
for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) { |
1267 |
reg = tcg_target_reg_alloc_order[i]; |
1268 |
if (tcg_regset_test_reg(reg_ct, reg)) {
|
1269 |
tcg_reg_free(s, reg); |
1270 |
return reg;
|
1271 |
} |
1272 |
} |
1273 |
|
1274 |
tcg_abort(); |
1275 |
} |
1276 |
|
1277 |
/* at the end of a basic block, we assume all temporaries are dead and
|
1278 |
all globals are stored at their canonical location */
|
1279 |
/* XXX: optimize by handling constants in another array ? */
|
1280 |
void tcg_reg_alloc_bb_end(TCGContext *s)
|
1281 |
{ |
1282 |
TCGTemp *ts; |
1283 |
int i;
|
1284 |
|
1285 |
for(i = 0; i < s->nb_globals; i++) { |
1286 |
ts = &s->temps[i]; |
1287 |
if (!ts->fixed_reg) {
|
1288 |
if (ts->val_type == TEMP_VAL_REG) {
|
1289 |
tcg_reg_free(s, ts->reg); |
1290 |
} |
1291 |
} |
1292 |
} |
1293 |
|
1294 |
for(i = s->nb_globals; i < s->nb_temps; i++) {
|
1295 |
ts = &s->temps[i]; |
1296 |
if (ts->val_type != TEMP_VAL_CONST) {
|
1297 |
if (ts->val_type == TEMP_VAL_REG) {
|
1298 |
s->reg_to_temp[ts->reg] = -1;
|
1299 |
} |
1300 |
ts->val_type = TEMP_VAL_DEAD; |
1301 |
} |
1302 |
} |
1303 |
} |
1304 |
|
1305 |
#define IS_DEAD_IARG(n) ((dead_iargs >> (n)) & 1) |
1306 |
|
1307 |
static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def, |
1308 |
const TCGArg *args,
|
1309 |
unsigned int dead_iargs) |
1310 |
{ |
1311 |
TCGTemp *ts, *ots; |
1312 |
int reg;
|
1313 |
const TCGArgConstraint *arg_ct;
|
1314 |
|
1315 |
ots = &s->temps[args[0]];
|
1316 |
ts = &s->temps[args[1]];
|
1317 |
arg_ct = &def->args_ct[0];
|
1318 |
|
1319 |
if (ts->val_type == TEMP_VAL_REG) {
|
1320 |
if (IS_DEAD_IARG(0) && !ts->fixed_reg && !ots->fixed_reg) { |
1321 |
/* the mov can be suppressed */
|
1322 |
if (ots->val_type == TEMP_VAL_REG)
|
1323 |
s->reg_to_temp[ots->reg] = -1;
|
1324 |
reg = ts->reg; |
1325 |
s->reg_to_temp[reg] = -1;
|
1326 |
ts->val_type = TEMP_VAL_DEAD; |
1327 |
} else {
|
1328 |
if (ots->val_type == TEMP_VAL_REG) {
|
1329 |
reg = ots->reg; |
1330 |
} else {
|
1331 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1332 |
} |
1333 |
if (ts->reg != reg) {
|
1334 |
tcg_out_mov(s, reg, ts->reg); |
1335 |
} |
1336 |
} |
1337 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1338 |
if (ots->val_type == TEMP_VAL_REG) {
|
1339 |
reg = ots->reg; |
1340 |
} else {
|
1341 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1342 |
} |
1343 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1344 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1345 |
if (ots->val_type == TEMP_VAL_REG) {
|
1346 |
reg = ots->reg; |
1347 |
} else {
|
1348 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs); |
1349 |
} |
1350 |
tcg_out_movi(s, ots->type, reg, ts->val); |
1351 |
} else {
|
1352 |
tcg_abort(); |
1353 |
} |
1354 |
s->reg_to_temp[reg] = args[0];
|
1355 |
ots->reg = reg; |
1356 |
ots->val_type = TEMP_VAL_REG; |
1357 |
ots->mem_coherent = 0;
|
1358 |
} |
1359 |
|
1360 |
static void tcg_reg_alloc_op(TCGContext *s, |
1361 |
const TCGOpDef *def, int opc, |
1362 |
const TCGArg *args,
|
1363 |
unsigned int dead_iargs) |
1364 |
{ |
1365 |
TCGRegSet allocated_regs; |
1366 |
int i, k, nb_iargs, nb_oargs, reg;
|
1367 |
TCGArg arg; |
1368 |
const TCGArgConstraint *arg_ct;
|
1369 |
TCGTemp *ts; |
1370 |
TCGArg new_args[TCG_MAX_OP_ARGS]; |
1371 |
int const_args[TCG_MAX_OP_ARGS];
|
1372 |
|
1373 |
nb_oargs = def->nb_oargs; |
1374 |
nb_iargs = def->nb_iargs; |
1375 |
|
1376 |
/* copy constants */
|
1377 |
memcpy(new_args + nb_oargs + nb_iargs, |
1378 |
args + nb_oargs + nb_iargs, |
1379 |
sizeof(TCGArg) * def->nb_cargs);
|
1380 |
|
1381 |
/* satisfy input constraints */
|
1382 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1383 |
for(k = 0; k < nb_iargs; k++) { |
1384 |
i = def->sorted_args[nb_oargs + k]; |
1385 |
arg = args[i]; |
1386 |
arg_ct = &def->args_ct[i]; |
1387 |
ts = &s->temps[arg]; |
1388 |
if (ts->val_type == TEMP_VAL_MEM) {
|
1389 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1390 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1391 |
ts->val_type = TEMP_VAL_REG; |
1392 |
ts->reg = reg; |
1393 |
ts->mem_coherent = 1;
|
1394 |
s->reg_to_temp[reg] = arg; |
1395 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1396 |
if (tcg_target_const_match(ts->val, arg_ct)) {
|
1397 |
/* constant is OK for instruction */
|
1398 |
const_args[i] = 1;
|
1399 |
new_args[i] = ts->val; |
1400 |
goto iarg_end;
|
1401 |
} else {
|
1402 |
/* need to move to a register*/
|
1403 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1404 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1405 |
goto iarg_end1;
|
1406 |
} |
1407 |
} |
1408 |
assert(ts->val_type == TEMP_VAL_REG); |
1409 |
if (arg_ct->ct & TCG_CT_IALIAS) {
|
1410 |
if (ts->fixed_reg) {
|
1411 |
/* if fixed register, we must allocate a new register
|
1412 |
if the alias is not the same register */
|
1413 |
if (arg != args[arg_ct->alias_index])
|
1414 |
goto allocate_in_reg;
|
1415 |
} else {
|
1416 |
/* if the input is aliased to an output and if it is
|
1417 |
not dead after the instruction, we must allocate
|
1418 |
a new register and move it */
|
1419 |
if (!IS_DEAD_IARG(i - nb_oargs))
|
1420 |
goto allocate_in_reg;
|
1421 |
} |
1422 |
} |
1423 |
reg = ts->reg; |
1424 |
if (tcg_regset_test_reg(arg_ct->u.regs, reg)) {
|
1425 |
/* nothing to do : the constraint is satisfied */
|
1426 |
} else {
|
1427 |
allocate_in_reg:
|
1428 |
/* allocate a new register matching the constraint
|
1429 |
and move the temporary register into it */
|
1430 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1431 |
tcg_out_mov(s, reg, ts->reg); |
1432 |
} |
1433 |
iarg_end1:
|
1434 |
new_args[i] = reg; |
1435 |
const_args[i] = 0;
|
1436 |
tcg_regset_set_reg(allocated_regs, reg); |
1437 |
iarg_end: ;
|
1438 |
} |
1439 |
|
1440 |
/* mark dead temporaries and free the associated registers */
|
1441 |
for(i = 0; i < nb_iargs; i++) { |
1442 |
arg = args[nb_oargs + i]; |
1443 |
if (IS_DEAD_IARG(i)) {
|
1444 |
ts = &s->temps[arg]; |
1445 |
if (ts->val_type != TEMP_VAL_CONST && !ts->fixed_reg) {
|
1446 |
if (ts->val_type == TEMP_VAL_REG)
|
1447 |
s->reg_to_temp[ts->reg] = -1;
|
1448 |
ts->val_type = TEMP_VAL_DEAD; |
1449 |
} |
1450 |
} |
1451 |
} |
1452 |
|
1453 |
if (def->flags & TCG_OPF_CALL_CLOBBER) {
|
1454 |
/* XXX: permit generic clobber register list ? */
|
1455 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1456 |
if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
|
1457 |
tcg_reg_free(s, reg); |
1458 |
} |
1459 |
} |
1460 |
/* XXX: for load/store we could do that only for the slow path
|
1461 |
(i.e. when a memory callback is called) */
|
1462 |
|
1463 |
/* store globals and free associated registers (we assume the insn
|
1464 |
can modify any global. */
|
1465 |
for(i = 0; i < s->nb_globals; i++) { |
1466 |
ts = &s->temps[i]; |
1467 |
if (!ts->fixed_reg) {
|
1468 |
if (ts->val_type == TEMP_VAL_REG) {
|
1469 |
tcg_reg_free(s, ts->reg); |
1470 |
} |
1471 |
} |
1472 |
} |
1473 |
} |
1474 |
|
1475 |
/* satisfy the output constraints */
|
1476 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1477 |
for(k = 0; k < nb_oargs; k++) { |
1478 |
i = def->sorted_args[k]; |
1479 |
arg = args[i]; |
1480 |
arg_ct = &def->args_ct[i]; |
1481 |
ts = &s->temps[arg]; |
1482 |
if (arg_ct->ct & TCG_CT_ALIAS) {
|
1483 |
reg = new_args[arg_ct->alias_index]; |
1484 |
} else {
|
1485 |
/* if fixed register, we try to use it */
|
1486 |
reg = ts->reg; |
1487 |
if (ts->fixed_reg &&
|
1488 |
tcg_regset_test_reg(arg_ct->u.regs, reg)) { |
1489 |
goto oarg_end;
|
1490 |
} |
1491 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1492 |
} |
1493 |
tcg_regset_set_reg(allocated_regs, reg); |
1494 |
/* if a fixed register is used, then a move will be done afterwards */
|
1495 |
if (!ts->fixed_reg) {
|
1496 |
if (ts->val_type == TEMP_VAL_REG)
|
1497 |
s->reg_to_temp[ts->reg] = -1;
|
1498 |
ts->val_type = TEMP_VAL_REG; |
1499 |
ts->reg = reg; |
1500 |
/* temp value is modified, so the value kept in memory is
|
1501 |
potentially not the same */
|
1502 |
ts->mem_coherent = 0;
|
1503 |
s->reg_to_temp[reg] = arg; |
1504 |
} |
1505 |
oarg_end:
|
1506 |
new_args[i] = reg; |
1507 |
} |
1508 |
|
1509 |
if (def->flags & TCG_OPF_BB_END)
|
1510 |
tcg_reg_alloc_bb_end(s); |
1511 |
|
1512 |
/* emit instruction */
|
1513 |
tcg_out_op(s, opc, new_args, const_args); |
1514 |
|
1515 |
/* move the outputs in the correct register if needed */
|
1516 |
for(i = 0; i < nb_oargs; i++) { |
1517 |
ts = &s->temps[args[i]]; |
1518 |
reg = new_args[i]; |
1519 |
if (ts->fixed_reg && ts->reg != reg) {
|
1520 |
tcg_out_mov(s, ts->reg, reg); |
1521 |
} |
1522 |
} |
1523 |
} |
1524 |
|
1525 |
#ifdef TCG_TARGET_STACK_GROWSUP
|
1526 |
#define STACK_DIR(x) (-(x))
|
1527 |
#else
|
1528 |
#define STACK_DIR(x) (x)
|
1529 |
#endif
|
1530 |
|
1531 |
static int tcg_reg_alloc_call(TCGContext *s, const TCGOpDef *def, |
1532 |
int opc, const TCGArg *args, |
1533 |
unsigned int dead_iargs) |
1534 |
{ |
1535 |
int nb_iargs, nb_oargs, flags, nb_regs, i, reg, nb_params;
|
1536 |
TCGArg arg, func_arg; |
1537 |
TCGTemp *ts; |
1538 |
tcg_target_long stack_offset, call_stack_size, func_addr; |
1539 |
int const_func_arg, allocate_args;
|
1540 |
TCGRegSet allocated_regs; |
1541 |
const TCGArgConstraint *arg_ct;
|
1542 |
|
1543 |
arg = *args++; |
1544 |
|
1545 |
nb_oargs = arg >> 16;
|
1546 |
nb_iargs = arg & 0xffff;
|
1547 |
nb_params = nb_iargs - 1;
|
1548 |
|
1549 |
flags = args[nb_oargs + nb_iargs]; |
1550 |
|
1551 |
nb_regs = tcg_target_get_call_iarg_regs_count(flags); |
1552 |
if (nb_regs > nb_params)
|
1553 |
nb_regs = nb_params; |
1554 |
|
1555 |
/* assign stack slots first */
|
1556 |
/* XXX: preallocate call stack */
|
1557 |
call_stack_size = (nb_params - nb_regs) * sizeof(tcg_target_long);
|
1558 |
call_stack_size = (call_stack_size + TCG_TARGET_STACK_ALIGN - 1) &
|
1559 |
~(TCG_TARGET_STACK_ALIGN - 1);
|
1560 |
allocate_args = (call_stack_size > TCG_STATIC_CALL_ARGS_SIZE); |
1561 |
if (allocate_args) {
|
1562 |
tcg_out_addi(s, TCG_REG_CALL_STACK, -STACK_DIR(call_stack_size)); |
1563 |
} |
1564 |
/* XXX: on some architectures it does not start at zero */
|
1565 |
stack_offset = 0;
|
1566 |
for(i = nb_regs; i < nb_params; i++) {
|
1567 |
arg = args[nb_oargs + i]; |
1568 |
ts = &s->temps[arg]; |
1569 |
if (ts->val_type == TEMP_VAL_REG) {
|
1570 |
tcg_out_st(s, ts->type, ts->reg, TCG_REG_CALL_STACK, stack_offset); |
1571 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1572 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1573 |
s->reserved_regs); |
1574 |
/* XXX: not correct if reading values from the stack */
|
1575 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1576 |
tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset); |
1577 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1578 |
reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type], |
1579 |
s->reserved_regs); |
1580 |
/* XXX: sign extend may be needed on some targets */
|
1581 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1582 |
tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset); |
1583 |
} else {
|
1584 |
tcg_abort(); |
1585 |
} |
1586 |
/* XXX: not necessarily in the same order */
|
1587 |
stack_offset += STACK_DIR(sizeof(tcg_target_long));
|
1588 |
} |
1589 |
|
1590 |
/* assign input registers */
|
1591 |
tcg_regset_set(allocated_regs, s->reserved_regs); |
1592 |
for(i = 0; i < nb_regs; i++) { |
1593 |
arg = args[nb_oargs + i]; |
1594 |
ts = &s->temps[arg]; |
1595 |
reg = tcg_target_call_iarg_regs[i]; |
1596 |
tcg_reg_free(s, reg); |
1597 |
if (ts->val_type == TEMP_VAL_REG) {
|
1598 |
if (ts->reg != reg) {
|
1599 |
tcg_out_mov(s, reg, ts->reg); |
1600 |
} |
1601 |
} else if (ts->val_type == TEMP_VAL_MEM) { |
1602 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1603 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1604 |
/* XXX: sign extend ? */
|
1605 |
tcg_out_movi(s, ts->type, reg, ts->val); |
1606 |
} else {
|
1607 |
tcg_abort(); |
1608 |
} |
1609 |
tcg_regset_set_reg(allocated_regs, reg); |
1610 |
} |
1611 |
|
1612 |
/* assign function address */
|
1613 |
func_arg = args[nb_oargs + nb_iargs - 1];
|
1614 |
arg_ct = &def->args_ct[0];
|
1615 |
ts = &s->temps[func_arg]; |
1616 |
func_addr = ts->val; |
1617 |
const_func_arg = 0;
|
1618 |
if (ts->val_type == TEMP_VAL_MEM) {
|
1619 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1620 |
tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset); |
1621 |
func_arg = reg; |
1622 |
} else if (ts->val_type == TEMP_VAL_REG) { |
1623 |
reg = ts->reg; |
1624 |
if (!tcg_regset_test_reg(arg_ct->u.regs, reg)) {
|
1625 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1626 |
tcg_out_mov(s, reg, ts->reg); |
1627 |
} |
1628 |
func_arg = reg; |
1629 |
} else if (ts->val_type == TEMP_VAL_CONST) { |
1630 |
if (tcg_target_const_match(func_addr, arg_ct)) {
|
1631 |
const_func_arg = 1;
|
1632 |
func_arg = func_addr; |
1633 |
} else {
|
1634 |
reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs); |
1635 |
tcg_out_movi(s, ts->type, reg, func_addr); |
1636 |
func_arg = reg; |
1637 |
} |
1638 |
} else {
|
1639 |
tcg_abort(); |
1640 |
} |
1641 |
|
1642 |
/* mark dead temporaries and free the associated registers */
|
1643 |
for(i = 0; i < nb_params; i++) { |
1644 |
arg = args[nb_oargs + i]; |
1645 |
if (IS_DEAD_IARG(i)) {
|
1646 |
ts = &s->temps[arg]; |
1647 |
if (ts->val_type != TEMP_VAL_CONST && !ts->fixed_reg) {
|
1648 |
if (ts->val_type == TEMP_VAL_REG)
|
1649 |
s->reg_to_temp[ts->reg] = -1;
|
1650 |
ts->val_type = TEMP_VAL_DEAD; |
1651 |
} |
1652 |
} |
1653 |
} |
1654 |
|
1655 |
/* clobber call registers */
|
1656 |
for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) { |
1657 |
if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
|
1658 |
tcg_reg_free(s, reg); |
1659 |
} |
1660 |
} |
1661 |
|
1662 |
/* store globals and free associated registers (we assume the call
|
1663 |
can modify any global. */
|
1664 |
for(i = 0; i < s->nb_globals; i++) { |
1665 |
ts = &s->temps[i]; |
1666 |
if (!ts->fixed_reg) {
|
1667 |
if (ts->val_type == TEMP_VAL_REG) {
|
1668 |
tcg_reg_free(s, ts->reg); |
1669 |
} |
1670 |
} |
1671 |
} |
1672 |
|
1673 |
tcg_out_op(s, opc, &func_arg, &const_func_arg); |
1674 |
|
1675 |
if (allocate_args) {
|
1676 |
tcg_out_addi(s, TCG_REG_CALL_STACK, STACK_DIR(call_stack_size)); |
1677 |
} |
1678 |
|
1679 |
/* assign output registers and emit moves if needed */
|
1680 |
for(i = 0; i < nb_oargs; i++) { |
1681 |
arg = args[i]; |
1682 |
ts = &s->temps[arg]; |
1683 |
reg = tcg_target_call_oarg_regs[i]; |
1684 |
tcg_reg_free(s, reg); |
1685 |
if (ts->fixed_reg) {
|
1686 |
if (ts->reg != reg) {
|
1687 |
tcg_out_mov(s, ts->reg, reg); |
1688 |
} |
1689 |
} else {
|
1690 |
if (ts->val_type == TEMP_VAL_REG)
|
1691 |
s->reg_to_temp[ts->reg] = -1;
|
1692 |
ts->val_type = TEMP_VAL_REG; |
1693 |
ts->reg = reg; |
1694 |
ts->mem_coherent = 0;
|
1695 |
s->reg_to_temp[reg] = arg; |
1696 |
} |
1697 |
} |
1698 |
|
1699 |
return nb_iargs + nb_oargs + def->nb_cargs + 1; |
1700 |
} |
1701 |
|
1702 |
#ifdef CONFIG_PROFILER
|
1703 |
|
1704 |
static int64_t dyngen_table_op_count[NB_OPS];
|
1705 |
|
1706 |
void dump_op_count(void) |
1707 |
{ |
1708 |
int i;
|
1709 |
FILE *f; |
1710 |
f = fopen("/tmp/op1.log", "w"); |
1711 |
for(i = 0; i < INDEX_op_end; i++) { |
1712 |
fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, dyngen_table_op_count[i]); |
1713 |
} |
1714 |
fclose(f); |
1715 |
f = fopen("/tmp/op2.log", "w"); |
1716 |
for(i = INDEX_op_end; i < NB_OPS; i++) {
|
1717 |
fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, dyngen_table_op_count[i]); |
1718 |
} |
1719 |
fclose(f); |
1720 |
} |
1721 |
#endif
|
1722 |
|
1723 |
|
1724 |
static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf, |
1725 |
long search_pc)
|
1726 |
{ |
1727 |
int opc, op_index, macro_op_index;
|
1728 |
const TCGOpDef *def;
|
1729 |
unsigned int dead_iargs; |
1730 |
const TCGArg *args;
|
1731 |
|
1732 |
#ifdef DEBUG_DISAS
|
1733 |
if (unlikely(loglevel & CPU_LOG_TB_OP)) {
|
1734 |
fprintf(logfile, "OP:\n");
|
1735 |
tcg_dump_ops(s, logfile); |
1736 |
fprintf(logfile, "\n");
|
1737 |
} |
1738 |
#endif
|
1739 |
|
1740 |
tcg_liveness_analysis(s); |
1741 |
|
1742 |
#ifdef DEBUG_DISAS
|
1743 |
if (unlikely(loglevel & CPU_LOG_TB_OP_OPT)) {
|
1744 |
fprintf(logfile, "OP after la:\n");
|
1745 |
tcg_dump_ops(s, logfile); |
1746 |
fprintf(logfile, "\n");
|
1747 |
} |
1748 |
#endif
|
1749 |
|
1750 |
tcg_reg_alloc_start(s); |
1751 |
|
1752 |
s->code_buf = gen_code_buf; |
1753 |
s->code_ptr = gen_code_buf; |
1754 |
|
1755 |
macro_op_index = -1;
|
1756 |
args = gen_opparam_buf; |
1757 |
op_index = 0;
|
1758 |
|
1759 |
for(;;) {
|
1760 |
opc = gen_opc_buf[op_index]; |
1761 |
#ifdef CONFIG_PROFILER
|
1762 |
dyngen_table_op_count[opc]++; |
1763 |
#endif
|
1764 |
def = &tcg_op_defs[opc]; |
1765 |
#if 0
|
1766 |
printf("%s: %d %d %d\n", def->name,
|
1767 |
def->nb_oargs, def->nb_iargs, def->nb_cargs);
|
1768 |
// dump_regs(s);
|
1769 |
#endif
|
1770 |
switch(opc) {
|
1771 |
case INDEX_op_mov_i32:
|
1772 |
#if TCG_TARGET_REG_BITS == 64 |
1773 |
case INDEX_op_mov_i64:
|
1774 |
#endif
|
1775 |
dead_iargs = s->op_dead_iargs[op_index]; |
1776 |
tcg_reg_alloc_mov(s, def, args, dead_iargs); |
1777 |
break;
|
1778 |
case INDEX_op_nop:
|
1779 |
case INDEX_op_nop1:
|
1780 |
case INDEX_op_nop2:
|
1781 |
case INDEX_op_nop3:
|
1782 |
break;
|
1783 |
case INDEX_op_nopn:
|
1784 |
args += args[0];
|
1785 |
goto next;
|
1786 |
case INDEX_op_discard:
|
1787 |
{ |
1788 |
TCGTemp *ts; |
1789 |
ts = &s->temps[args[0]];
|
1790 |
/* mark the temporary as dead */
|
1791 |
if (ts->val_type != TEMP_VAL_CONST && !ts->fixed_reg) {
|
1792 |
if (ts->val_type == TEMP_VAL_REG)
|
1793 |
s->reg_to_temp[ts->reg] = -1;
|
1794 |
ts->val_type = TEMP_VAL_DEAD; |
1795 |
} |
1796 |
} |
1797 |
break;
|
1798 |
case INDEX_op_macro_goto:
|
1799 |
macro_op_index = op_index; /* only used for exceptions */
|
1800 |
op_index = args[0] - 1; |
1801 |
args = gen_opparam_buf + args[1];
|
1802 |
goto next;
|
1803 |
case INDEX_op_macro_end:
|
1804 |
macro_op_index = -1; /* only used for exceptions */ |
1805 |
op_index = args[0] - 1; |
1806 |
args = gen_opparam_buf + args[1];
|
1807 |
goto next;
|
1808 |
case INDEX_op_macro_start:
|
1809 |
/* must never happen here */
|
1810 |
tcg_abort(); |
1811 |
case INDEX_op_set_label:
|
1812 |
tcg_reg_alloc_bb_end(s); |
1813 |
tcg_out_label(s, args[0], (long)s->code_ptr); |
1814 |
break;
|
1815 |
case INDEX_op_call:
|
1816 |
dead_iargs = s->op_dead_iargs[op_index]; |
1817 |
args += tcg_reg_alloc_call(s, def, opc, args, dead_iargs); |
1818 |
goto next;
|
1819 |
case INDEX_op_end:
|
1820 |
goto the_end;
|
1821 |
|
1822 |
#ifdef CONFIG_DYNGEN_OP
|
1823 |
case 0 ... INDEX_op_end - 1: |
1824 |
/* legacy dyngen ops */
|
1825 |
#ifdef CONFIG_PROFILER
|
1826 |
{ |
1827 |
extern int64_t dyngen_old_op_count;
|
1828 |
dyngen_old_op_count++; |
1829 |
} |
1830 |
#endif
|
1831 |
tcg_reg_alloc_bb_end(s); |
1832 |
if (search_pc >= 0) { |
1833 |
s->code_ptr += def->copy_size; |
1834 |
args += def->nb_args; |
1835 |
} else {
|
1836 |
args = dyngen_op(s, opc, args); |
1837 |
} |
1838 |
goto next;
|
1839 |
#endif
|
1840 |
default:
|
1841 |
/* Note: in order to speed up the code, it would be much
|
1842 |
faster to have specialized register allocator functions for
|
1843 |
some common argument patterns */
|
1844 |
dead_iargs = s->op_dead_iargs[op_index]; |
1845 |
tcg_reg_alloc_op(s, def, opc, args, dead_iargs); |
1846 |
break;
|
1847 |
} |
1848 |
args += def->nb_args; |
1849 |
next: ;
|
1850 |
if (search_pc >= 0 && search_pc < s->code_ptr - gen_code_buf) { |
1851 |
if (macro_op_index >= 0) |
1852 |
return macro_op_index;
|
1853 |
else
|
1854 |
return op_index;
|
1855 |
} |
1856 |
op_index++; |
1857 |
#ifndef NDEBUG
|
1858 |
check_regs(s); |
1859 |
#endif
|
1860 |
} |
1861 |
the_end:
|
1862 |
return -1; |
1863 |
} |
1864 |
|
1865 |
int dyngen_code(TCGContext *s, uint8_t *gen_code_buf)
|
1866 |
{ |
1867 |
#ifdef CONFIG_PROFILER
|
1868 |
{ |
1869 |
extern int64_t dyngen_op_count;
|
1870 |
extern int dyngen_op_count_max; |
1871 |
int n;
|
1872 |
n = (gen_opc_ptr - gen_opc_buf); |
1873 |
dyngen_op_count += n; |
1874 |
if (n > dyngen_op_count_max)
|
1875 |
dyngen_op_count_max = n; |
1876 |
} |
1877 |
#endif
|
1878 |
|
1879 |
tcg_gen_code_common(s, gen_code_buf, -1);
|
1880 |
|
1881 |
/* flush instruction cache */
|
1882 |
flush_icache_range((unsigned long)gen_code_buf, |
1883 |
(unsigned long)s->code_ptr); |
1884 |
return s->code_ptr - gen_code_buf;
|
1885 |
} |
1886 |
|
1887 |
/* Return the index of the micro operation such as the pc after is <
|
1888 |
offset bytes from the start of the TB. The contents of gen_code_buf must
|
1889 |
not be changed, though writing the same values is ok.
|
1890 |
Return -1 if not found. */
|
1891 |
int dyngen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset) |
1892 |
{ |
1893 |
return tcg_gen_code_common(s, gen_code_buf, offset);
|
1894 |
} |