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1.1 root 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: #ifdef _AIX
41: #include <alloca.h>
42: #endif
43:
44: #include "config.h"
45: #include "qemu-common.h"
46: #include "cache-utils.h"
47:
48: /* Note: the long term plan is to reduce the dependancies on the QEMU
49: CPU definitions. Currently they are used for qemu_ld/st
50: instructions */
51: #define NO_CPU_IO_DEFS
52: #include "cpu.h"
53: #include "exec-all.h"
54:
55: #include "tcg-op.h"
56: #include "elf.h"
57:
58:
59: static void patch_reloc(uint8_t *code_ptr, int type,
60: tcg_target_long value, tcg_target_long addend);
61:
62: static TCGOpDef tcg_op_defs[] = {
63: #define DEF(s, n, copy_size) { #s, 0, 0, n, n, 0, copy_size },
64: #define DEF2(s, iargs, oargs, cargs, flags) { #s, iargs, oargs, cargs, iargs + oargs + cargs, flags, 0 },
65: #include "tcg-opc.h"
66: #undef DEF
67: #undef DEF2
68: };
69:
70: static TCGRegSet tcg_target_available_regs[2];
71: static TCGRegSet tcg_target_call_clobber_regs;
72:
73: /* XXX: move that inside the context */
74: uint16_t *gen_opc_ptr;
75: TCGArg *gen_opparam_ptr;
76:
77: static inline void tcg_out8(TCGContext *s, uint8_t v)
78: {
79: *s->code_ptr++ = v;
80: }
81:
82: static inline void tcg_out16(TCGContext *s, uint16_t v)
83: {
84: *(uint16_t *)s->code_ptr = v;
85: s->code_ptr += 2;
86: }
87:
88: static inline void tcg_out32(TCGContext *s, uint32_t v)
89: {
90: *(uint32_t *)s->code_ptr = v;
91: s->code_ptr += 4;
92: }
93:
94: /* label relocation processing */
95:
96: void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type,
97: int label_index, long addend)
98: {
99: TCGLabel *l;
100: TCGRelocation *r;
101:
102: l = &s->labels[label_index];
103: if (l->has_value) {
104: /* FIXME: This may break relocations on RISC targets that
105: modify instruction fields in place. The caller may not have
106: written the initial value. */
107: patch_reloc(code_ptr, type, l->u.value, addend);
108: } else {
109: /* add a new relocation entry */
110: r = tcg_malloc(sizeof(TCGRelocation));
111: r->type = type;
112: r->ptr = code_ptr;
113: r->addend = addend;
114: r->next = l->u.first_reloc;
115: l->u.first_reloc = r;
116: }
117: }
118:
119: static void tcg_out_label(TCGContext *s, int label_index,
120: tcg_target_long value)
121: {
122: TCGLabel *l;
123: TCGRelocation *r;
124:
125: l = &s->labels[label_index];
126: if (l->has_value)
127: tcg_abort();
128: r = l->u.first_reloc;
129: while (r != NULL) {
130: patch_reloc(r->ptr, r->type, value, r->addend);
131: r = r->next;
132: }
133: l->has_value = 1;
134: l->u.value = value;
135: }
136:
137: int gen_new_label(void)
138: {
139: TCGContext *s = &tcg_ctx;
140: int idx;
141: TCGLabel *l;
142:
143: if (s->nb_labels >= TCG_MAX_LABELS)
144: tcg_abort();
145: idx = s->nb_labels++;
146: l = &s->labels[idx];
147: l->has_value = 0;
148: l->u.first_reloc = NULL;
149: return idx;
150: }
151:
152: #include "tcg-target.c"
153:
154: /* pool based memory allocation */
155: void *tcg_malloc_internal(TCGContext *s, int size)
156: {
157: TCGPool *p;
158: int pool_size;
159:
160: if (size > TCG_POOL_CHUNK_SIZE) {
161: /* big malloc: insert a new pool (XXX: could optimize) */
162: p = qemu_malloc(sizeof(TCGPool) + size);
163: p->size = size;
164: if (s->pool_current)
165: s->pool_current->next = p;
166: else
167: s->pool_first = p;
168: p->next = s->pool_current;
169: } else {
170: p = s->pool_current;
171: if (!p) {
172: p = s->pool_first;
173: if (!p)
174: goto new_pool;
175: } else {
176: if (!p->next) {
177: new_pool:
178: pool_size = TCG_POOL_CHUNK_SIZE;
179: p = qemu_malloc(sizeof(TCGPool) + pool_size);
180: p->size = pool_size;
181: p->next = NULL;
182: if (s->pool_current)
183: s->pool_current->next = p;
184: else
185: s->pool_first = p;
186: } else {
187: p = p->next;
188: }
189: }
190: }
191: s->pool_current = p;
192: s->pool_cur = p->data + size;
193: s->pool_end = p->data + p->size;
194: return p->data;
195: }
196:
197: void tcg_pool_reset(TCGContext *s)
198: {
199: s->pool_cur = s->pool_end = NULL;
200: s->pool_current = NULL;
201: }
202:
203: void tcg_context_init(TCGContext *s)
204: {
205: int op, total_args, n;
206: TCGOpDef *def;
207: TCGArgConstraint *args_ct;
208: int *sorted_args;
209:
210: memset(s, 0, sizeof(*s));
211: s->temps = s->static_temps;
212: s->nb_globals = 0;
213:
214: /* Count total number of arguments and allocate the corresponding
215: space */
216: total_args = 0;
217: for(op = 0; op < NB_OPS; op++) {
218: def = &tcg_op_defs[op];
219: n = def->nb_iargs + def->nb_oargs;
220: total_args += n;
221: }
222:
223: args_ct = qemu_malloc(sizeof(TCGArgConstraint) * total_args);
224: sorted_args = qemu_malloc(sizeof(int) * total_args);
225:
226: for(op = 0; op < NB_OPS; op++) {
227: def = &tcg_op_defs[op];
228: def->args_ct = args_ct;
229: def->sorted_args = sorted_args;
230: n = def->nb_iargs + def->nb_oargs;
231: sorted_args += n;
232: args_ct += n;
233: }
234:
235: tcg_target_init(s);
236:
237: /* init global prologue and epilogue */
238: s->code_buf = code_gen_prologue;
239: s->code_ptr = s->code_buf;
240: tcg_target_qemu_prologue(s);
241: flush_icache_range((unsigned long)s->code_buf,
242: (unsigned long)s->code_ptr);
243: }
244:
245: void tcg_set_frame(TCGContext *s, int reg,
246: tcg_target_long start, tcg_target_long size)
247: {
248: s->frame_start = start;
249: s->frame_end = start + size;
250: s->frame_reg = reg;
251: }
252:
253: void tcg_func_start(TCGContext *s)
254: {
255: int i;
256: tcg_pool_reset(s);
257: s->nb_temps = s->nb_globals;
258: for(i = 0; i < (TCG_TYPE_COUNT * 2); i++)
259: s->first_free_temp[i] = -1;
260: s->labels = tcg_malloc(sizeof(TCGLabel) * TCG_MAX_LABELS);
261: s->nb_labels = 0;
262: s->current_frame_offset = s->frame_start;
263:
264: gen_opc_ptr = gen_opc_buf;
265: gen_opparam_ptr = gen_opparam_buf;
266: }
267:
268: static inline void tcg_temp_alloc(TCGContext *s, int n)
269: {
270: if (n > TCG_MAX_TEMPS)
271: tcg_abort();
272: }
273:
274: static inline int tcg_global_reg_new_internal(TCGType type, int reg,
275: const char *name)
276: {
277: TCGContext *s = &tcg_ctx;
278: TCGTemp *ts;
279: int idx;
280:
281: #if TCG_TARGET_REG_BITS == 32
282: if (type != TCG_TYPE_I32)
283: tcg_abort();
284: #endif
285: if (tcg_regset_test_reg(s->reserved_regs, reg))
286: tcg_abort();
287: idx = s->nb_globals;
288: tcg_temp_alloc(s, s->nb_globals + 1);
289: ts = &s->temps[s->nb_globals];
290: ts->base_type = type;
291: ts->type = type;
292: ts->fixed_reg = 1;
293: ts->reg = reg;
294: ts->name = name;
295: s->nb_globals++;
296: tcg_regset_set_reg(s->reserved_regs, reg);
297: return idx;
298: }
299:
300: TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name)
301: {
302: int idx;
303:
304: idx = tcg_global_reg_new_internal(TCG_TYPE_I32, reg, name);
305: return MAKE_TCGV_I32(idx);
306: }
307:
308: TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name)
309: {
310: int idx;
311:
312: idx = tcg_global_reg_new_internal(TCG_TYPE_I64, reg, name);
313: return MAKE_TCGV_I64(idx);
314: }
315:
316: static inline int tcg_global_mem_new_internal(TCGType type, int reg,
317: tcg_target_long offset,
318: const char *name)
319: {
320: TCGContext *s = &tcg_ctx;
321: TCGTemp *ts;
322: int idx;
323:
324: idx = s->nb_globals;
325: #if TCG_TARGET_REG_BITS == 32
326: if (type == TCG_TYPE_I64) {
327: char buf[64];
328: tcg_temp_alloc(s, s->nb_globals + 2);
329: ts = &s->temps[s->nb_globals];
330: ts->base_type = type;
331: ts->type = TCG_TYPE_I32;
332: ts->fixed_reg = 0;
333: ts->mem_allocated = 1;
334: ts->mem_reg = reg;
335: #ifdef TCG_TARGET_WORDS_BIGENDIAN
336: ts->mem_offset = offset + 4;
337: #else
338: ts->mem_offset = offset;
339: #endif
340: pstrcpy(buf, sizeof(buf), name);
341: pstrcat(buf, sizeof(buf), "_0");
342: ts->name = strdup(buf);
343: ts++;
344:
345: ts->base_type = type;
346: ts->type = TCG_TYPE_I32;
347: ts->fixed_reg = 0;
348: ts->mem_allocated = 1;
349: ts->mem_reg = reg;
350: #ifdef TCG_TARGET_WORDS_BIGENDIAN
351: ts->mem_offset = offset;
352: #else
353: ts->mem_offset = offset + 4;
354: #endif
355: pstrcpy(buf, sizeof(buf), name);
356: pstrcat(buf, sizeof(buf), "_1");
357: ts->name = strdup(buf);
358:
359: s->nb_globals += 2;
360: } else
361: #endif
362: {
363: tcg_temp_alloc(s, s->nb_globals + 1);
364: ts = &s->temps[s->nb_globals];
365: ts->base_type = type;
366: ts->type = type;
367: ts->fixed_reg = 0;
368: ts->mem_allocated = 1;
369: ts->mem_reg = reg;
370: ts->mem_offset = offset;
371: ts->name = name;
372: s->nb_globals++;
373: }
374: return idx;
375: }
376:
377: TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
378: const char *name)
379: {
380: int idx;
381:
382: idx = tcg_global_mem_new_internal(TCG_TYPE_I32, reg, offset, name);
383: return MAKE_TCGV_I32(idx);
384: }
385:
386: TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
387: const char *name)
388: {
389: int idx;
390:
391: idx = tcg_global_mem_new_internal(TCG_TYPE_I64, reg, offset, name);
392: return MAKE_TCGV_I64(idx);
393: }
394:
395: static inline int tcg_temp_new_internal(TCGType type, int temp_local)
396: {
397: TCGContext *s = &tcg_ctx;
398: TCGTemp *ts;
399: int idx, k;
400:
401: k = type;
402: if (temp_local)
403: k += TCG_TYPE_COUNT;
404: idx = s->first_free_temp[k];
405: if (idx != -1) {
406: /* There is already an available temp with the
407: right type */
408: ts = &s->temps[idx];
409: s->first_free_temp[k] = ts->next_free_temp;
410: ts->temp_allocated = 1;
411: assert(ts->temp_local == temp_local);
412: } else {
413: idx = s->nb_temps;
414: #if TCG_TARGET_REG_BITS == 32
415: if (type == TCG_TYPE_I64) {
416: tcg_temp_alloc(s, s->nb_temps + 2);
417: ts = &s->temps[s->nb_temps];
418: ts->base_type = type;
419: ts->type = TCG_TYPE_I32;
420: ts->temp_allocated = 1;
421: ts->temp_local = temp_local;
422: ts->name = NULL;
423: ts++;
424: ts->base_type = TCG_TYPE_I32;
425: ts->type = TCG_TYPE_I32;
426: ts->temp_allocated = 1;
427: ts->temp_local = temp_local;
428: ts->name = NULL;
429: s->nb_temps += 2;
430: } else
431: #endif
432: {
433: tcg_temp_alloc(s, s->nb_temps + 1);
434: ts = &s->temps[s->nb_temps];
435: ts->base_type = type;
436: ts->type = type;
437: ts->temp_allocated = 1;
438: ts->temp_local = temp_local;
439: ts->name = NULL;
440: s->nb_temps++;
441: }
442: }
443: return idx;
444: }
445:
446: TCGv_i32 tcg_temp_new_internal_i32(int temp_local)
447: {
448: int idx;
449:
450: idx = tcg_temp_new_internal(TCG_TYPE_I32, temp_local);
451: return MAKE_TCGV_I32(idx);
452: }
453:
454: TCGv_i64 tcg_temp_new_internal_i64(int temp_local)
455: {
456: int idx;
457:
458: idx = tcg_temp_new_internal(TCG_TYPE_I64, temp_local);
459: return MAKE_TCGV_I64(idx);
460: }
461:
462: static inline void tcg_temp_free_internal(int idx)
463: {
464: TCGContext *s = &tcg_ctx;
465: TCGTemp *ts;
466: int k;
467:
468: assert(idx >= s->nb_globals && idx < s->nb_temps);
469: ts = &s->temps[idx];
470: assert(ts->temp_allocated != 0);
471: ts->temp_allocated = 0;
472: k = ts->base_type;
473: if (ts->temp_local)
474: k += TCG_TYPE_COUNT;
475: ts->next_free_temp = s->first_free_temp[k];
476: s->first_free_temp[k] = idx;
477: }
478:
479: void tcg_temp_free_i32(TCGv_i32 arg)
480: {
481: tcg_temp_free_internal(GET_TCGV_I32(arg));
482: }
483:
484: void tcg_temp_free_i64(TCGv_i64 arg)
485: {
486: tcg_temp_free_internal(GET_TCGV_I64(arg));
487: }
488:
489: TCGv_i32 tcg_const_i32(int32_t val)
490: {
491: TCGv_i32 t0;
492: t0 = tcg_temp_new_i32();
493: tcg_gen_movi_i32(t0, val);
494: return t0;
495: }
496:
497: TCGv_i64 tcg_const_i64(int64_t val)
498: {
499: TCGv_i64 t0;
500: t0 = tcg_temp_new_i64();
501: tcg_gen_movi_i64(t0, val);
502: return t0;
503: }
504:
505: TCGv_i32 tcg_const_local_i32(int32_t val)
506: {
507: TCGv_i32 t0;
508: t0 = tcg_temp_local_new_i32();
509: tcg_gen_movi_i32(t0, val);
510: return t0;
511: }
512:
513: TCGv_i64 tcg_const_local_i64(int64_t val)
514: {
515: TCGv_i64 t0;
516: t0 = tcg_temp_local_new_i64();
517: tcg_gen_movi_i64(t0, val);
518: return t0;
519: }
520:
521: void tcg_register_helper(void *func, const char *name)
522: {
523: TCGContext *s = &tcg_ctx;
524: int n;
525: if ((s->nb_helpers + 1) > s->allocated_helpers) {
526: n = s->allocated_helpers;
527: if (n == 0) {
528: n = 4;
529: } else {
530: n *= 2;
531: }
532: s->helpers = realloc(s->helpers, n * sizeof(TCGHelperInfo));
533: s->allocated_helpers = n;
534: }
535: s->helpers[s->nb_helpers].func = (tcg_target_ulong)func;
536: s->helpers[s->nb_helpers].name = name;
537: s->nb_helpers++;
538: }
539:
540: /* Note: we convert the 64 bit args to 32 bit and do some alignment
541: and endian swap. Maybe it would be better to do the alignment
542: and endian swap in tcg_reg_alloc_call(). */
543: void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
544: int sizemask, TCGArg ret, int nargs, TCGArg *args)
545: {
546: int call_type;
547: int i;
548: int real_args;
549: int nb_rets;
550: TCGArg *nparam;
551: *gen_opc_ptr++ = INDEX_op_call;
552: nparam = gen_opparam_ptr++;
553: call_type = (flags & TCG_CALL_TYPE_MASK);
554: if (ret != TCG_CALL_DUMMY_ARG) {
555: #if TCG_TARGET_REG_BITS < 64
556: if (sizemask & 1) {
557: #ifdef TCG_TARGET_WORDS_BIGENDIAN
558: *gen_opparam_ptr++ = ret + 1;
559: *gen_opparam_ptr++ = ret;
560: #else
561: *gen_opparam_ptr++ = ret;
562: *gen_opparam_ptr++ = ret + 1;
563: #endif
564: nb_rets = 2;
565: } else
566: #endif
567: {
568: *gen_opparam_ptr++ = ret;
569: nb_rets = 1;
570: }
571: } else {
572: nb_rets = 0;
573: }
574: real_args = 0;
575: for (i = 0; i < nargs; i++) {
576: #if TCG_TARGET_REG_BITS < 64
577: if (sizemask & (2 << i)) {
578: #ifdef TCG_TARGET_I386
579: /* REGPARM case: if the third parameter is 64 bit, it is
580: allocated on the stack */
581: if (i == 2 && call_type == TCG_CALL_TYPE_REGPARM) {
582: call_type = TCG_CALL_TYPE_REGPARM_2;
583: flags = (flags & ~TCG_CALL_TYPE_MASK) | call_type;
584: }
585: #endif
586: #ifdef TCG_TARGET_CALL_ALIGN_ARGS
587: /* some targets want aligned 64 bit args */
588: if (real_args & 1) {
589: *gen_opparam_ptr++ = TCG_CALL_DUMMY_ARG;
590: real_args++;
591: }
592: #endif
593: #ifdef TCG_TARGET_WORDS_BIGENDIAN
594: *gen_opparam_ptr++ = args[i] + 1;
595: *gen_opparam_ptr++ = args[i];
596: #else
597: *gen_opparam_ptr++ = args[i];
598: *gen_opparam_ptr++ = args[i] + 1;
599: #endif
600: real_args += 2;
601: } else
602: #endif
603: {
604: *gen_opparam_ptr++ = args[i];
605: real_args++;
606: }
607: }
608: *gen_opparam_ptr++ = GET_TCGV_PTR(func);
609:
610: *gen_opparam_ptr++ = flags;
611:
612: *nparam = (nb_rets << 16) | (real_args + 1);
613:
614: /* total parameters, needed to go backward in the instruction stream */
615: *gen_opparam_ptr++ = 1 + nb_rets + real_args + 3;
616: }
617:
618: #if TCG_TARGET_REG_BITS == 32
619: void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
620: int c, int right, int arith)
621: {
622: if (c == 0) {
623: tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg1));
624: tcg_gen_mov_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1));
625: } else if (c >= 32) {
626: c -= 32;
627: if (right) {
628: if (arith) {
629: tcg_gen_sari_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c);
630: tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), 31);
631: } else {
632: tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c);
633: tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
634: }
635: } else {
636: tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_LOW(arg1), c);
637: tcg_gen_movi_i32(TCGV_LOW(ret), 0);
638: }
639: } else {
640: TCGv_i32 t0, t1;
641:
642: t0 = tcg_temp_new_i32();
643: t1 = tcg_temp_new_i32();
644: if (right) {
645: tcg_gen_shli_i32(t0, TCGV_HIGH(arg1), 32 - c);
646: if (arith)
647: tcg_gen_sari_i32(t1, TCGV_HIGH(arg1), c);
648: else
649: tcg_gen_shri_i32(t1, TCGV_HIGH(arg1), c);
650: tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_LOW(arg1), c);
651: tcg_gen_or_i32(TCGV_LOW(ret), TCGV_LOW(ret), t0);
652: tcg_gen_mov_i32(TCGV_HIGH(ret), t1);
653: } else {
654: tcg_gen_shri_i32(t0, TCGV_LOW(arg1), 32 - c);
655: /* Note: ret can be the same as arg1, so we use t1 */
656: tcg_gen_shli_i32(t1, TCGV_LOW(arg1), c);
657: tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), c);
658: tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(ret), t0);
659: tcg_gen_mov_i32(TCGV_LOW(ret), t1);
660: }
661: tcg_temp_free_i32(t0);
662: tcg_temp_free_i32(t1);
663: }
664: }
665: #endif
666:
667: static 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 = s->nb_globals; i < s->nb_temps; i++) {
680: ts = &s->temps[i];
681: ts->val_type = TEMP_VAL_DEAD;
682: ts->mem_allocated = 0;
683: ts->fixed_reg = 0;
684: }
685: for(i = 0; i < TCG_TARGET_NB_REGS; i++) {
686: s->reg_to_temp[i] = -1;
687: }
688: }
689:
690: static char *tcg_get_arg_str_idx(TCGContext *s, char *buf, int buf_size,
691: int idx)
692: {
693: TCGTemp *ts;
694:
695: ts = &s->temps[idx];
696: if (idx < s->nb_globals) {
697: pstrcpy(buf, buf_size, ts->name);
698: } else {
699: if (ts->temp_local)
700: snprintf(buf, buf_size, "loc%d", idx - s->nb_globals);
701: else
702: snprintf(buf, buf_size, "tmp%d", idx - s->nb_globals);
703: }
704: return buf;
705: }
706:
707: char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg)
708: {
709: return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV_I32(arg));
710: }
711:
712: char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg)
713: {
714: return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV_I64(arg));
715: }
716:
717: static int helper_cmp(const void *p1, const void *p2)
718: {
719: const TCGHelperInfo *th1 = p1;
720: const TCGHelperInfo *th2 = p2;
721: if (th1->func < th2->func)
722: return -1;
723: else if (th1->func == th2->func)
724: return 0;
725: else
726: return 1;
727: }
728:
729: /* find helper definition (Note: A hash table would be better) */
730: static TCGHelperInfo *tcg_find_helper(TCGContext *s, tcg_target_ulong val)
731: {
732: int m, m_min, m_max;
733: TCGHelperInfo *th;
734: tcg_target_ulong v;
735:
736: if (unlikely(!s->helpers_sorted)) {
737: qsort(s->helpers, s->nb_helpers, sizeof(TCGHelperInfo),
738: helper_cmp);
739: s->helpers_sorted = 1;
740: }
741:
742: /* binary search */
743: m_min = 0;
744: m_max = s->nb_helpers - 1;
745: while (m_min <= m_max) {
746: m = (m_min + m_max) >> 1;
747: th = &s->helpers[m];
748: v = th->func;
749: if (v == val)
750: return th;
751: else if (val < v) {
752: m_max = m - 1;
753: } else {
754: m_min = m + 1;
755: }
756: }
757: return NULL;
758: }
759:
760: static const char * const cond_name[] =
761: {
762: [TCG_COND_EQ] = "eq",
763: [TCG_COND_NE] = "ne",
764: [TCG_COND_LT] = "lt",
765: [TCG_COND_GE] = "ge",
766: [TCG_COND_LE] = "le",
767: [TCG_COND_GT] = "gt",
768: [TCG_COND_LTU] = "ltu",
769: [TCG_COND_GEU] = "geu",
770: [TCG_COND_LEU] = "leu",
771: [TCG_COND_GTU] = "gtu"
772: };
773:
774: void tcg_dump_ops(TCGContext *s, FILE *outfile)
775: {
776: const uint16_t *opc_ptr;
777: const TCGArg *args;
778: TCGArg arg;
779: int c, i, k, nb_oargs, nb_iargs, nb_cargs, first_insn;
780: const TCGOpDef *def;
781: char buf[128];
782:
783: first_insn = 1;
784: opc_ptr = gen_opc_buf;
785: args = gen_opparam_buf;
786: while (opc_ptr < gen_opc_ptr) {
787: c = *opc_ptr++;
788: def = &tcg_op_defs[c];
789: if (c == INDEX_op_debug_insn_start) {
790: uint64_t pc;
791: #if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
792: pc = ((uint64_t)args[1] << 32) | args[0];
793: #else
794: pc = args[0];
795: #endif
796: if (!first_insn)
797: fprintf(outfile, "\n");
798: fprintf(outfile, " ---- 0x%" PRIx64, pc);
799: first_insn = 0;
800: nb_oargs = def->nb_oargs;
801: nb_iargs = def->nb_iargs;
802: nb_cargs = def->nb_cargs;
803: } else if (c == INDEX_op_call) {
804: TCGArg arg;
805:
806: /* variable number of arguments */
807: arg = *args++;
808: nb_oargs = arg >> 16;
809: nb_iargs = arg & 0xffff;
810: nb_cargs = def->nb_cargs;
811:
812: fprintf(outfile, " %s ", def->name);
813:
814: /* function name */
815: fprintf(outfile, "%s",
816: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + nb_iargs - 1]));
817: /* flags */
818: fprintf(outfile, ",$0x%" TCG_PRIlx,
819: args[nb_oargs + nb_iargs]);
820: /* nb out args */
821: fprintf(outfile, ",$%d", nb_oargs);
822: for(i = 0; i < nb_oargs; i++) {
823: fprintf(outfile, ",");
824: fprintf(outfile, "%s",
825: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[i]));
826: }
827: for(i = 0; i < (nb_iargs - 1); i++) {
828: fprintf(outfile, ",");
829: if (args[nb_oargs + i] == TCG_CALL_DUMMY_ARG) {
830: fprintf(outfile, "<dummy>");
831: } else {
832: fprintf(outfile, "%s",
833: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + i]));
834: }
835: }
836: } else if (c == INDEX_op_movi_i32
837: #if TCG_TARGET_REG_BITS == 64
838: || c == INDEX_op_movi_i64
839: #endif
840: ) {
841: tcg_target_ulong val;
842: TCGHelperInfo *th;
843:
844: nb_oargs = def->nb_oargs;
845: nb_iargs = def->nb_iargs;
846: nb_cargs = def->nb_cargs;
847: fprintf(outfile, " %s %s,$", def->name,
848: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[0]));
849: val = args[1];
850: th = tcg_find_helper(s, val);
851: if (th) {
852: fprintf(outfile, "%s", th->name);
853: } else {
854: if (c == INDEX_op_movi_i32)
855: fprintf(outfile, "0x%x", (uint32_t)val);
856: else
857: fprintf(outfile, "0x%" PRIx64 , (uint64_t)val);
858: }
859: } else {
860: fprintf(outfile, " %s ", def->name);
861: if (c == INDEX_op_nopn) {
862: /* variable number of arguments */
863: nb_cargs = *args;
864: nb_oargs = 0;
865: nb_iargs = 0;
866: } else {
867: nb_oargs = def->nb_oargs;
868: nb_iargs = def->nb_iargs;
869: nb_cargs = def->nb_cargs;
870: }
871:
872: k = 0;
873: for(i = 0; i < nb_oargs; i++) {
874: if (k != 0)
875: fprintf(outfile, ",");
876: fprintf(outfile, "%s",
877: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
878: }
879: for(i = 0; i < nb_iargs; i++) {
880: if (k != 0)
881: fprintf(outfile, ",");
882: fprintf(outfile, "%s",
883: tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
884: }
885: if (c == INDEX_op_brcond_i32
886: #if TCG_TARGET_REG_BITS == 32
887: || c == INDEX_op_brcond2_i32
888: #elif TCG_TARGET_REG_BITS == 64
889: || c == INDEX_op_brcond_i64
890: #endif
891: ) {
892: if (args[k] < ARRAY_SIZE(cond_name) && cond_name[args[k]])
893: fprintf(outfile, ",%s", cond_name[args[k++]]);
894: else
895: fprintf(outfile, ",$0x%" TCG_PRIlx, args[k++]);
896: i = 1;
897: }
898: else
899: i = 0;
900: for(; i < nb_cargs; i++) {
901: if (k != 0)
902: fprintf(outfile, ",");
903: arg = args[k++];
904: fprintf(outfile, "$0x%" TCG_PRIlx, arg);
905: }
906: }
907: fprintf(outfile, "\n");
908: args += nb_iargs + nb_oargs + nb_cargs;
909: }
910: }
911:
912: /* we give more priority to constraints with less registers */
913: static int get_constraint_priority(const TCGOpDef *def, int k)
914: {
915: const TCGArgConstraint *arg_ct;
916:
917: int i, n;
918: arg_ct = &def->args_ct[k];
919: if (arg_ct->ct & TCG_CT_ALIAS) {
920: /* an alias is equivalent to a single register */
921: n = 1;
922: } else {
923: if (!(arg_ct->ct & TCG_CT_REG))
924: return 0;
925: n = 0;
926: for(i = 0; i < TCG_TARGET_NB_REGS; i++) {
927: if (tcg_regset_test_reg(arg_ct->u.regs, i))
928: n++;
929: }
930: }
931: return TCG_TARGET_NB_REGS - n + 1;
932: }
933:
934: /* sort from highest priority to lowest */
935: static void sort_constraints(TCGOpDef *def, int start, int n)
936: {
937: int i, j, p1, p2, tmp;
938:
939: for(i = 0; i < n; i++)
940: def->sorted_args[start + i] = start + i;
941: if (n <= 1)
942: return;
943: for(i = 0; i < n - 1; i++) {
944: for(j = i + 1; j < n; j++) {
945: p1 = get_constraint_priority(def, def->sorted_args[start + i]);
946: p2 = get_constraint_priority(def, def->sorted_args[start + j]);
947: if (p1 < p2) {
948: tmp = def->sorted_args[start + i];
949: def->sorted_args[start + i] = def->sorted_args[start + j];
950: def->sorted_args[start + j] = tmp;
951: }
952: }
953: }
954: }
955:
956: void tcg_add_target_add_op_defs(const TCGTargetOpDef *tdefs)
957: {
958: int op;
959: TCGOpDef *def;
960: const char *ct_str;
961: int i, nb_args;
962:
963: for(;;) {
964: if (tdefs->op < 0)
965: break;
966: op = tdefs->op;
967: assert(op >= 0 && op < NB_OPS);
968: def = &tcg_op_defs[op];
969: nb_args = def->nb_iargs + def->nb_oargs;
970: for(i = 0; i < nb_args; i++) {
971: ct_str = tdefs->args_ct_str[i];
972: tcg_regset_clear(def->args_ct[i].u.regs);
973: def->args_ct[i].ct = 0;
974: if (ct_str[0] >= '0' && ct_str[0] <= '9') {
975: int oarg;
976: oarg = ct_str[0] - '0';
977: assert(oarg < def->nb_oargs);
978: assert(def->args_ct[oarg].ct & TCG_CT_REG);
979: /* TCG_CT_ALIAS is for the output arguments. The input
980: argument is tagged with TCG_CT_IALIAS. */
981: def->args_ct[i] = def->args_ct[oarg];
982: def->args_ct[oarg].ct = TCG_CT_ALIAS;
983: def->args_ct[oarg].alias_index = i;
984: def->args_ct[i].ct |= TCG_CT_IALIAS;
985: def->args_ct[i].alias_index = oarg;
986: } else {
987: for(;;) {
988: if (*ct_str == '\0')
989: break;
990: switch(*ct_str) {
991: case 'i':
992: def->args_ct[i].ct |= TCG_CT_CONST;
993: ct_str++;
994: break;
995: default:
996: if (target_parse_constraint(&def->args_ct[i], &ct_str) < 0) {
997: fprintf(stderr, "Invalid constraint '%s' for arg %d of operation '%s'\n",
998: ct_str, i, def->name);
999: exit(1);
1000: }
1001: }
1002: }
1003: }
1004: }
1005:
1006: /* sort the constraints (XXX: this is just an heuristic) */
1007: sort_constraints(def, 0, def->nb_oargs);
1008: sort_constraints(def, def->nb_oargs, def->nb_iargs);
1009:
1010: #if 0
1011: {
1012: int i;
1013:
1014: printf("%s: sorted=", def->name);
1015: for(i = 0; i < def->nb_oargs + def->nb_iargs; i++)
1016: printf(" %d", def->sorted_args[i]);
1017: printf("\n");
1018: }
1019: #endif
1020: tdefs++;
1021: }
1022:
1023: }
1024:
1025: #ifdef USE_LIVENESS_ANALYSIS
1026:
1027: /* set a nop for an operation using 'nb_args' */
1028: static inline void tcg_set_nop(TCGContext *s, uint16_t *opc_ptr,
1029: TCGArg *args, int nb_args)
1030: {
1031: if (nb_args == 0) {
1032: *opc_ptr = INDEX_op_nop;
1033: } else {
1034: *opc_ptr = INDEX_op_nopn;
1035: args[0] = nb_args;
1036: args[nb_args - 1] = nb_args;
1037: }
1038: }
1039:
1040: /* liveness analysis: end of function: globals are live, temps are
1041: dead. */
1042: /* XXX: at this stage, not used as there would be little gains because
1043: most TBs end with a conditional jump. */
1044: static inline void tcg_la_func_end(TCGContext *s, uint8_t *dead_temps)
1045: {
1046: memset(dead_temps, 0, s->nb_globals);
1047: memset(dead_temps + s->nb_globals, 1, s->nb_temps - s->nb_globals);
1048: }
1049:
1050: /* liveness analysis: end of basic block: globals are live, temps are
1051: dead, local temps are live. */
1052: static inline void tcg_la_bb_end(TCGContext *s, uint8_t *dead_temps)
1053: {
1054: int i;
1055: TCGTemp *ts;
1056:
1057: memset(dead_temps, 0, s->nb_globals);
1058: ts = &s->temps[s->nb_globals];
1059: for(i = s->nb_globals; i < s->nb_temps; i++) {
1060: if (ts->temp_local)
1061: dead_temps[i] = 0;
1062: else
1063: dead_temps[i] = 1;
1064: ts++;
1065: }
1066: }
1067:
1068: /* Liveness analysis : update the opc_dead_iargs array to tell if a
1069: given input arguments is dead. Instructions updating dead
1070: temporaries are removed. */
1071: static void tcg_liveness_analysis(TCGContext *s)
1072: {
1073: int i, op_index, op, nb_args, nb_iargs, nb_oargs, arg, nb_ops;
1074: TCGArg *args;
1075: const TCGOpDef *def;
1076: uint8_t *dead_temps;
1077: unsigned int dead_iargs;
1078:
1079: gen_opc_ptr++; /* skip end */
1080:
1081: nb_ops = gen_opc_ptr - gen_opc_buf;
1082:
1083: /* XXX: make it really dynamic */
1084: s->op_dead_iargs = tcg_malloc(OPC_BUF_SIZE * sizeof(uint16_t));
1085:
1086: dead_temps = tcg_malloc(s->nb_temps);
1087: memset(dead_temps, 1, s->nb_temps);
1088:
1089: args = gen_opparam_ptr;
1090: op_index = nb_ops - 1;
1091: while (op_index >= 0) {
1092: op = gen_opc_buf[op_index];
1093: def = &tcg_op_defs[op];
1094: switch(op) {
1095: case INDEX_op_call:
1096: {
1097: int call_flags;
1098:
1099: nb_args = args[-1];
1100: args -= nb_args;
1101: nb_iargs = args[0] & 0xffff;
1102: nb_oargs = args[0] >> 16;
1103: args++;
1104: call_flags = args[nb_oargs + nb_iargs];
1105:
1106: /* pure functions can be removed if their result is not
1107: used */
1108: if (call_flags & TCG_CALL_PURE) {
1109: for(i = 0; i < nb_oargs; i++) {
1110: arg = args[i];
1111: if (!dead_temps[arg])
1112: goto do_not_remove_call;
1113: }
1114: tcg_set_nop(s, gen_opc_buf + op_index,
1115: args - 1, nb_args);
1116: } else {
1117: do_not_remove_call:
1118:
1119: /* output args are dead */
1120: for(i = 0; i < nb_oargs; i++) {
1121: arg = args[i];
1122: dead_temps[arg] = 1;
1123: }
1124:
1125: /* globals are live (they may be used by the call) */
1126: memset(dead_temps, 0, s->nb_globals);
1127:
1128: /* input args are live */
1129: dead_iargs = 0;
1130: for(i = 0; i < nb_iargs; i++) {
1131: arg = args[i + nb_oargs];
1132: if (arg != TCG_CALL_DUMMY_ARG) {
1133: if (dead_temps[arg]) {
1134: dead_iargs |= (1 << i);
1135: }
1136: dead_temps[arg] = 0;
1137: }
1138: }
1139: s->op_dead_iargs[op_index] = dead_iargs;
1140: }
1141: args--;
1142: }
1143: break;
1144: case INDEX_op_set_label:
1145: args--;
1146: /* mark end of basic block */
1147: tcg_la_bb_end(s, dead_temps);
1148: break;
1149: case INDEX_op_debug_insn_start:
1150: args -= def->nb_args;
1151: break;
1152: case INDEX_op_nopn:
1153: nb_args = args[-1];
1154: args -= nb_args;
1155: break;
1156: case INDEX_op_discard:
1157: args--;
1158: /* mark the temporary as dead */
1159: dead_temps[args[0]] = 1;
1160: break;
1161: case INDEX_op_end:
1162: break;
1163: /* XXX: optimize by hardcoding common cases (e.g. triadic ops) */
1164: default:
1165: args -= def->nb_args;
1166: nb_iargs = def->nb_iargs;
1167: nb_oargs = def->nb_oargs;
1168:
1169: /* Test if the operation can be removed because all
1170: its outputs are dead. We assume that nb_oargs == 0
1171: implies side effects */
1172: if (!(def->flags & TCG_OPF_SIDE_EFFECTS) && nb_oargs != 0) {
1173: for(i = 0; i < nb_oargs; i++) {
1174: arg = args[i];
1175: if (!dead_temps[arg])
1176: goto do_not_remove;
1177: }
1178: tcg_set_nop(s, gen_opc_buf + op_index, args, def->nb_args);
1179: #ifdef CONFIG_PROFILER
1180: s->del_op_count++;
1181: #endif
1182: } else {
1183: do_not_remove:
1184:
1185: /* output args are dead */
1186: for(i = 0; i < nb_oargs; i++) {
1187: arg = args[i];
1188: dead_temps[arg] = 1;
1189: }
1190:
1191: /* if end of basic block, update */
1192: if (def->flags & TCG_OPF_BB_END) {
1193: tcg_la_bb_end(s, dead_temps);
1194: } else if (def->flags & TCG_OPF_CALL_CLOBBER) {
1195: /* globals are live */
1196: memset(dead_temps, 0, s->nb_globals);
1197: }
1198:
1199: /* input args are live */
1200: dead_iargs = 0;
1201: for(i = 0; i < nb_iargs; i++) {
1202: arg = args[i + nb_oargs];
1203: if (dead_temps[arg]) {
1204: dead_iargs |= (1 << i);
1205: }
1206: dead_temps[arg] = 0;
1207: }
1208: s->op_dead_iargs[op_index] = dead_iargs;
1209: }
1210: break;
1211: }
1212: op_index--;
1213: }
1214:
1215: if (args != gen_opparam_buf)
1216: tcg_abort();
1217: }
1218: #else
1219: /* dummy liveness analysis */
1220: void tcg_liveness_analysis(TCGContext *s)
1221: {
1222: int nb_ops;
1223: nb_ops = gen_opc_ptr - gen_opc_buf;
1224:
1225: s->op_dead_iargs = tcg_malloc(nb_ops * sizeof(uint16_t));
1226: memset(s->op_dead_iargs, 0, nb_ops * sizeof(uint16_t));
1227: }
1228: #endif
1229:
1230: #ifndef NDEBUG
1231: static void dump_regs(TCGContext *s)
1232: {
1233: TCGTemp *ts;
1234: int i;
1235: char buf[64];
1236:
1237: for(i = 0; i < s->nb_temps; i++) {
1238: ts = &s->temps[i];
1239: printf(" %10s: ", tcg_get_arg_str_idx(s, buf, sizeof(buf), i));
1240: switch(ts->val_type) {
1241: case TEMP_VAL_REG:
1242: printf("%s", tcg_target_reg_names[ts->reg]);
1243: break;
1244: case TEMP_VAL_MEM:
1245: printf("%d(%s)", (int)ts->mem_offset, tcg_target_reg_names[ts->mem_reg]);
1246: break;
1247: case TEMP_VAL_CONST:
1248: printf("$0x%" TCG_PRIlx, ts->val);
1249: break;
1250: case TEMP_VAL_DEAD:
1251: printf("D");
1252: break;
1253: default:
1254: printf("???");
1255: break;
1256: }
1257: printf("\n");
1258: }
1259:
1260: for(i = 0; i < TCG_TARGET_NB_REGS; i++) {
1261: if (s->reg_to_temp[i] >= 0) {
1262: printf("%s: %s\n",
1263: tcg_target_reg_names[i],
1264: tcg_get_arg_str_idx(s, buf, sizeof(buf), s->reg_to_temp[i]));
1265: }
1266: }
1267: }
1268:
1269: static void check_regs(TCGContext *s)
1270: {
1271: int reg, k;
1272: TCGTemp *ts;
1273: char buf[64];
1274:
1275: for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) {
1276: k = s->reg_to_temp[reg];
1277: if (k >= 0) {
1278: ts = &s->temps[k];
1279: if (ts->val_type != TEMP_VAL_REG ||
1280: ts->reg != reg) {
1281: printf("Inconsistency for register %s:\n",
1282: tcg_target_reg_names[reg]);
1283: goto fail;
1284: }
1285: }
1286: }
1287: for(k = 0; k < s->nb_temps; k++) {
1288: ts = &s->temps[k];
1289: if (ts->val_type == TEMP_VAL_REG &&
1290: !ts->fixed_reg &&
1291: s->reg_to_temp[ts->reg] != k) {
1292: printf("Inconsistency for temp %s:\n",
1293: tcg_get_arg_str_idx(s, buf, sizeof(buf), k));
1294: fail:
1295: printf("reg state:\n");
1296: dump_regs(s);
1297: tcg_abort();
1298: }
1299: }
1300: }
1301: #endif
1302:
1303: static void temp_allocate_frame(TCGContext *s, int temp)
1304: {
1305: TCGTemp *ts;
1306: ts = &s->temps[temp];
1307: s->current_frame_offset = (s->current_frame_offset + sizeof(tcg_target_long) - 1) & ~(sizeof(tcg_target_long) - 1);
1308: if (s->current_frame_offset + sizeof(tcg_target_long) > s->frame_end)
1309: tcg_abort();
1310: ts->mem_offset = s->current_frame_offset;
1311: ts->mem_reg = s->frame_reg;
1312: ts->mem_allocated = 1;
1313: s->current_frame_offset += sizeof(tcg_target_long);
1314: }
1315:
1316: /* free register 'reg' by spilling the corresponding temporary if necessary */
1317: static void tcg_reg_free(TCGContext *s, int reg)
1318: {
1319: TCGTemp *ts;
1320: int temp;
1321:
1322: temp = s->reg_to_temp[reg];
1323: if (temp != -1) {
1324: ts = &s->temps[temp];
1325: assert(ts->val_type == TEMP_VAL_REG);
1326: if (!ts->mem_coherent) {
1327: if (!ts->mem_allocated)
1328: temp_allocate_frame(s, temp);
1329: tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1330: }
1331: ts->val_type = TEMP_VAL_MEM;
1332: s->reg_to_temp[reg] = -1;
1333: }
1334: }
1335:
1336: /* Allocate a register belonging to reg1 & ~reg2 */
1337: static int tcg_reg_alloc(TCGContext *s, TCGRegSet reg1, TCGRegSet reg2)
1338: {
1339: int i, reg;
1340: TCGRegSet reg_ct;
1341:
1342: tcg_regset_andnot(reg_ct, reg1, reg2);
1343:
1344: /* first try free registers */
1345: for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) {
1346: reg = tcg_target_reg_alloc_order[i];
1347: if (tcg_regset_test_reg(reg_ct, reg) && s->reg_to_temp[reg] == -1)
1348: return reg;
1349: }
1350:
1351: /* XXX: do better spill choice */
1352: for(i = 0; i < ARRAY_SIZE(tcg_target_reg_alloc_order); i++) {
1353: reg = tcg_target_reg_alloc_order[i];
1354: if (tcg_regset_test_reg(reg_ct, reg)) {
1355: tcg_reg_free(s, reg);
1356: return reg;
1357: }
1358: }
1359:
1360: tcg_abort();
1361: }
1362:
1363: /* save a temporary to memory. 'allocated_regs' is used in case a
1364: temporary registers needs to be allocated to store a constant. */
1365: static void temp_save(TCGContext *s, int temp, TCGRegSet allocated_regs)
1366: {
1367: TCGTemp *ts;
1368: int reg;
1369:
1370: ts = &s->temps[temp];
1371: if (!ts->fixed_reg) {
1372: switch(ts->val_type) {
1373: case TEMP_VAL_REG:
1374: tcg_reg_free(s, ts->reg);
1375: break;
1376: case TEMP_VAL_DEAD:
1377: ts->val_type = TEMP_VAL_MEM;
1378: break;
1379: case TEMP_VAL_CONST:
1380: reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type],
1381: allocated_regs);
1382: if (!ts->mem_allocated)
1383: temp_allocate_frame(s, temp);
1384: tcg_out_movi(s, ts->type, reg, ts->val);
1385: tcg_out_st(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1386: ts->val_type = TEMP_VAL_MEM;
1387: break;
1388: case TEMP_VAL_MEM:
1389: break;
1390: default:
1391: tcg_abort();
1392: }
1393: }
1394: }
1395:
1396: /* save globals to their cannonical location and assume they can be
1397: modified be the following code. 'allocated_regs' is used in case a
1398: temporary registers needs to be allocated to store a constant. */
1399: static void save_globals(TCGContext *s, TCGRegSet allocated_regs)
1400: {
1401: int i;
1402:
1403: for(i = 0; i < s->nb_globals; i++) {
1404: temp_save(s, i, allocated_regs);
1405: }
1406: }
1407:
1408: /* at the end of a basic block, we assume all temporaries are dead and
1409: all globals are stored at their canonical location. */
1410: static void tcg_reg_alloc_bb_end(TCGContext *s, TCGRegSet allocated_regs)
1411: {
1412: TCGTemp *ts;
1413: int i;
1414:
1415: for(i = s->nb_globals; i < s->nb_temps; i++) {
1416: ts = &s->temps[i];
1417: if (ts->temp_local) {
1418: temp_save(s, i, allocated_regs);
1419: } else {
1420: if (ts->val_type == TEMP_VAL_REG) {
1421: s->reg_to_temp[ts->reg] = -1;
1422: }
1423: ts->val_type = TEMP_VAL_DEAD;
1424: }
1425: }
1426:
1427: save_globals(s, allocated_regs);
1428: }
1429:
1430: #define IS_DEAD_IARG(n) ((dead_iargs >> (n)) & 1)
1431:
1432: static void tcg_reg_alloc_movi(TCGContext *s, const TCGArg *args)
1433: {
1434: TCGTemp *ots;
1435: tcg_target_ulong val;
1436:
1437: ots = &s->temps[args[0]];
1438: val = args[1];
1439:
1440: if (ots->fixed_reg) {
1441: /* for fixed registers, we do not do any constant
1442: propagation */
1443: tcg_out_movi(s, ots->type, ots->reg, val);
1444: } else {
1445: /* The movi is not explicitly generated here */
1446: if (ots->val_type == TEMP_VAL_REG)
1447: s->reg_to_temp[ots->reg] = -1;
1448: ots->val_type = TEMP_VAL_CONST;
1449: ots->val = val;
1450: }
1451: }
1452:
1453: static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
1454: const TCGArg *args,
1455: unsigned int dead_iargs)
1456: {
1457: TCGTemp *ts, *ots;
1458: int reg;
1459: const TCGArgConstraint *arg_ct;
1460:
1461: ots = &s->temps[args[0]];
1462: ts = &s->temps[args[1]];
1463: arg_ct = &def->args_ct[0];
1464:
1465: /* XXX: always mark arg dead if IS_DEAD_IARG(0) */
1466: if (ts->val_type == TEMP_VAL_REG) {
1467: if (IS_DEAD_IARG(0) && !ts->fixed_reg && !ots->fixed_reg) {
1468: /* the mov can be suppressed */
1469: if (ots->val_type == TEMP_VAL_REG)
1470: s->reg_to_temp[ots->reg] = -1;
1471: reg = ts->reg;
1472: s->reg_to_temp[reg] = -1;
1473: ts->val_type = TEMP_VAL_DEAD;
1474: } else {
1475: if (ots->val_type == TEMP_VAL_REG) {
1476: reg = ots->reg;
1477: } else {
1478: reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs);
1479: }
1480: if (ts->reg != reg) {
1481: tcg_out_mov(s, reg, ts->reg);
1482: }
1483: }
1484: } else if (ts->val_type == TEMP_VAL_MEM) {
1485: if (ots->val_type == TEMP_VAL_REG) {
1486: reg = ots->reg;
1487: } else {
1488: reg = tcg_reg_alloc(s, arg_ct->u.regs, s->reserved_regs);
1489: }
1490: tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1491: } else if (ts->val_type == TEMP_VAL_CONST) {
1492: if (ots->fixed_reg) {
1493: reg = ots->reg;
1494: tcg_out_movi(s, ots->type, reg, ts->val);
1495: } else {
1496: /* propagate constant */
1497: if (ots->val_type == TEMP_VAL_REG)
1498: s->reg_to_temp[ots->reg] = -1;
1499: ots->val_type = TEMP_VAL_CONST;
1500: ots->val = ts->val;
1501: return;
1502: }
1503: } else {
1504: tcg_abort();
1505: }
1506: s->reg_to_temp[reg] = args[0];
1507: ots->reg = reg;
1508: ots->val_type = TEMP_VAL_REG;
1509: ots->mem_coherent = 0;
1510: }
1511:
1512: static void tcg_reg_alloc_op(TCGContext *s,
1513: const TCGOpDef *def, int opc,
1514: const TCGArg *args,
1515: unsigned int dead_iargs)
1516: {
1517: TCGRegSet allocated_regs;
1518: int i, k, nb_iargs, nb_oargs, reg;
1519: TCGArg arg;
1520: const TCGArgConstraint *arg_ct;
1521: TCGTemp *ts;
1522: TCGArg new_args[TCG_MAX_OP_ARGS];
1523: int const_args[TCG_MAX_OP_ARGS];
1524:
1525: nb_oargs = def->nb_oargs;
1526: nb_iargs = def->nb_iargs;
1527:
1528: /* copy constants */
1529: memcpy(new_args + nb_oargs + nb_iargs,
1530: args + nb_oargs + nb_iargs,
1531: sizeof(TCGArg) * def->nb_cargs);
1532:
1533: /* satisfy input constraints */
1534: tcg_regset_set(allocated_regs, s->reserved_regs);
1535: for(k = 0; k < nb_iargs; k++) {
1536: i = def->sorted_args[nb_oargs + k];
1537: arg = args[i];
1538: arg_ct = &def->args_ct[i];
1539: ts = &s->temps[arg];
1540: if (ts->val_type == TEMP_VAL_MEM) {
1541: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1542: tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1543: ts->val_type = TEMP_VAL_REG;
1544: ts->reg = reg;
1545: ts->mem_coherent = 1;
1546: s->reg_to_temp[reg] = arg;
1547: } else if (ts->val_type == TEMP_VAL_CONST) {
1548: if (tcg_target_const_match(ts->val, arg_ct)) {
1549: /* constant is OK for instruction */
1550: const_args[i] = 1;
1551: new_args[i] = ts->val;
1552: goto iarg_end;
1553: } else {
1554: /* need to move to a register */
1555: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1556: tcg_out_movi(s, ts->type, reg, ts->val);
1557: ts->val_type = TEMP_VAL_REG;
1558: ts->reg = reg;
1559: ts->mem_coherent = 0;
1560: s->reg_to_temp[reg] = arg;
1561: }
1562: }
1563: assert(ts->val_type == TEMP_VAL_REG);
1564: if (arg_ct->ct & TCG_CT_IALIAS) {
1565: if (ts->fixed_reg) {
1566: /* if fixed register, we must allocate a new register
1567: if the alias is not the same register */
1568: if (arg != args[arg_ct->alias_index])
1569: goto allocate_in_reg;
1570: } else {
1571: /* if the input is aliased to an output and if it is
1572: not dead after the instruction, we must allocate
1573: a new register and move it */
1574: if (!IS_DEAD_IARG(i - nb_oargs))
1575: goto allocate_in_reg;
1576: }
1577: }
1578: reg = ts->reg;
1579: if (tcg_regset_test_reg(arg_ct->u.regs, reg)) {
1580: /* nothing to do : the constraint is satisfied */
1581: } else {
1582: allocate_in_reg:
1583: /* allocate a new register matching the constraint
1584: and move the temporary register into it */
1585: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1586: tcg_out_mov(s, reg, ts->reg);
1587: }
1588: new_args[i] = reg;
1589: const_args[i] = 0;
1590: tcg_regset_set_reg(allocated_regs, reg);
1591: iarg_end: ;
1592: }
1593:
1594: if (def->flags & TCG_OPF_BB_END) {
1595: tcg_reg_alloc_bb_end(s, allocated_regs);
1596: } else {
1597: /* mark dead temporaries and free the associated registers */
1598: for(i = 0; i < nb_iargs; i++) {
1599: arg = args[nb_oargs + i];
1600: if (IS_DEAD_IARG(i)) {
1601: ts = &s->temps[arg];
1602: if (!ts->fixed_reg) {
1603: if (ts->val_type == TEMP_VAL_REG)
1604: s->reg_to_temp[ts->reg] = -1;
1605: ts->val_type = TEMP_VAL_DEAD;
1606: }
1607: }
1608: }
1609:
1610: if (def->flags & TCG_OPF_CALL_CLOBBER) {
1611: /* XXX: permit generic clobber register list ? */
1612: for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) {
1613: if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
1614: tcg_reg_free(s, reg);
1615: }
1616: }
1617: /* XXX: for load/store we could do that only for the slow path
1618: (i.e. when a memory callback is called) */
1619:
1620: /* store globals and free associated registers (we assume the insn
1621: can modify any global. */
1622: save_globals(s, allocated_regs);
1623: }
1624:
1625: /* satisfy the output constraints */
1626: tcg_regset_set(allocated_regs, s->reserved_regs);
1627: for(k = 0; k < nb_oargs; k++) {
1628: i = def->sorted_args[k];
1629: arg = args[i];
1630: arg_ct = &def->args_ct[i];
1631: ts = &s->temps[arg];
1632: if (arg_ct->ct & TCG_CT_ALIAS) {
1633: reg = new_args[arg_ct->alias_index];
1634: } else {
1635: /* if fixed register, we try to use it */
1636: reg = ts->reg;
1637: if (ts->fixed_reg &&
1638: tcg_regset_test_reg(arg_ct->u.regs, reg)) {
1639: goto oarg_end;
1640: }
1641: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1642: }
1643: tcg_regset_set_reg(allocated_regs, reg);
1644: /* if a fixed register is used, then a move will be done afterwards */
1645: if (!ts->fixed_reg) {
1646: if (ts->val_type == TEMP_VAL_REG)
1647: s->reg_to_temp[ts->reg] = -1;
1648: ts->val_type = TEMP_VAL_REG;
1649: ts->reg = reg;
1650: /* temp value is modified, so the value kept in memory is
1651: potentially not the same */
1652: ts->mem_coherent = 0;
1653: s->reg_to_temp[reg] = arg;
1654: }
1655: oarg_end:
1656: new_args[i] = reg;
1657: }
1658: }
1659:
1660: /* emit instruction */
1661: tcg_out_op(s, opc, new_args, const_args);
1662:
1663: /* move the outputs in the correct register if needed */
1664: for(i = 0; i < nb_oargs; i++) {
1665: ts = &s->temps[args[i]];
1666: reg = new_args[i];
1667: if (ts->fixed_reg && ts->reg != reg) {
1668: tcg_out_mov(s, ts->reg, reg);
1669: }
1670: }
1671: }
1672:
1673: #ifdef TCG_TARGET_STACK_GROWSUP
1674: #define STACK_DIR(x) (-(x))
1675: #else
1676: #define STACK_DIR(x) (x)
1677: #endif
1678:
1679: static int tcg_reg_alloc_call(TCGContext *s, const TCGOpDef *def,
1680: int opc, const TCGArg *args,
1681: unsigned int dead_iargs)
1682: {
1683: int nb_iargs, nb_oargs, flags, nb_regs, i, reg, nb_params;
1684: TCGArg arg, func_arg;
1685: TCGTemp *ts;
1686: tcg_target_long stack_offset, call_stack_size, func_addr;
1687: int const_func_arg, allocate_args;
1688: TCGRegSet allocated_regs;
1689: const TCGArgConstraint *arg_ct;
1690:
1691: arg = *args++;
1692:
1693: nb_oargs = arg >> 16;
1694: nb_iargs = arg & 0xffff;
1695: nb_params = nb_iargs - 1;
1696:
1697: flags = args[nb_oargs + nb_iargs];
1698:
1699: nb_regs = tcg_target_get_call_iarg_regs_count(flags);
1700: if (nb_regs > nb_params)
1701: nb_regs = nb_params;
1702:
1703: /* assign stack slots first */
1704: /* XXX: preallocate call stack */
1705: call_stack_size = (nb_params - nb_regs) * sizeof(tcg_target_long);
1706: call_stack_size = (call_stack_size + TCG_TARGET_STACK_ALIGN - 1) &
1707: ~(TCG_TARGET_STACK_ALIGN - 1);
1708: allocate_args = (call_stack_size > TCG_STATIC_CALL_ARGS_SIZE);
1709: if (allocate_args) {
1710: tcg_out_addi(s, TCG_REG_CALL_STACK, -STACK_DIR(call_stack_size));
1711: }
1712:
1713: stack_offset = TCG_TARGET_CALL_STACK_OFFSET;
1714: for(i = nb_regs; i < nb_params; i++) {
1715: arg = args[nb_oargs + i];
1716: #ifdef TCG_TARGET_STACK_GROWSUP
1717: stack_offset -= sizeof(tcg_target_long);
1718: #endif
1719: if (arg != TCG_CALL_DUMMY_ARG) {
1720: ts = &s->temps[arg];
1721: if (ts->val_type == TEMP_VAL_REG) {
1722: tcg_out_st(s, ts->type, ts->reg, TCG_REG_CALL_STACK, stack_offset);
1723: } else if (ts->val_type == TEMP_VAL_MEM) {
1724: reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type],
1725: s->reserved_regs);
1726: /* XXX: not correct if reading values from the stack */
1727: tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1728: tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset);
1729: } else if (ts->val_type == TEMP_VAL_CONST) {
1730: reg = tcg_reg_alloc(s, tcg_target_available_regs[ts->type],
1731: s->reserved_regs);
1732: /* XXX: sign extend may be needed on some targets */
1733: tcg_out_movi(s, ts->type, reg, ts->val);
1734: tcg_out_st(s, ts->type, reg, TCG_REG_CALL_STACK, stack_offset);
1735: } else {
1736: tcg_abort();
1737: }
1738: }
1739: #ifndef TCG_TARGET_STACK_GROWSUP
1740: stack_offset += sizeof(tcg_target_long);
1741: #endif
1742: }
1743:
1744: /* assign input registers */
1745: tcg_regset_set(allocated_regs, s->reserved_regs);
1746: for(i = 0; i < nb_regs; i++) {
1747: arg = args[nb_oargs + i];
1748: if (arg != TCG_CALL_DUMMY_ARG) {
1749: ts = &s->temps[arg];
1750: reg = tcg_target_call_iarg_regs[i];
1751: tcg_reg_free(s, reg);
1752: if (ts->val_type == TEMP_VAL_REG) {
1753: if (ts->reg != reg) {
1754: tcg_out_mov(s, reg, ts->reg);
1755: }
1756: } else if (ts->val_type == TEMP_VAL_MEM) {
1757: tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1758: } else if (ts->val_type == TEMP_VAL_CONST) {
1759: /* XXX: sign extend ? */
1760: tcg_out_movi(s, ts->type, reg, ts->val);
1761: } else {
1762: tcg_abort();
1763: }
1764: tcg_regset_set_reg(allocated_regs, reg);
1765: }
1766: }
1767:
1768: /* assign function address */
1769: func_arg = args[nb_oargs + nb_iargs - 1];
1770: arg_ct = &def->args_ct[0];
1771: ts = &s->temps[func_arg];
1772: func_addr = ts->val;
1773: const_func_arg = 0;
1774: if (ts->val_type == TEMP_VAL_MEM) {
1775: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1776: tcg_out_ld(s, ts->type, reg, ts->mem_reg, ts->mem_offset);
1777: func_arg = reg;
1778: tcg_regset_set_reg(allocated_regs, reg);
1779: } else if (ts->val_type == TEMP_VAL_REG) {
1780: reg = ts->reg;
1781: if (!tcg_regset_test_reg(arg_ct->u.regs, reg)) {
1782: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1783: tcg_out_mov(s, reg, ts->reg);
1784: }
1785: func_arg = reg;
1786: tcg_regset_set_reg(allocated_regs, reg);
1787: } else if (ts->val_type == TEMP_VAL_CONST) {
1788: if (tcg_target_const_match(func_addr, arg_ct)) {
1789: const_func_arg = 1;
1790: func_arg = func_addr;
1791: } else {
1792: reg = tcg_reg_alloc(s, arg_ct->u.regs, allocated_regs);
1793: tcg_out_movi(s, ts->type, reg, func_addr);
1794: func_arg = reg;
1795: tcg_regset_set_reg(allocated_regs, reg);
1796: }
1797: } else {
1798: tcg_abort();
1799: }
1800:
1801:
1802: /* mark dead temporaries and free the associated registers */
1803: for(i = 0; i < nb_iargs; i++) {
1804: arg = args[nb_oargs + i];
1805: if (IS_DEAD_IARG(i)) {
1806: ts = &s->temps[arg];
1807: if (!ts->fixed_reg) {
1808: if (ts->val_type == TEMP_VAL_REG)
1809: s->reg_to_temp[ts->reg] = -1;
1810: ts->val_type = TEMP_VAL_DEAD;
1811: }
1812: }
1813: }
1814:
1815: /* clobber call registers */
1816: for(reg = 0; reg < TCG_TARGET_NB_REGS; reg++) {
1817: if (tcg_regset_test_reg(tcg_target_call_clobber_regs, reg)) {
1818: tcg_reg_free(s, reg);
1819: }
1820: }
1821:
1822: /* store globals and free associated registers (we assume the call
1823: can modify any global. */
1824: save_globals(s, allocated_regs);
1825:
1826: tcg_out_op(s, opc, &func_arg, &const_func_arg);
1827:
1828: if (allocate_args) {
1829: tcg_out_addi(s, TCG_REG_CALL_STACK, STACK_DIR(call_stack_size));
1830: }
1831:
1832: /* assign output registers and emit moves if needed */
1833: for(i = 0; i < nb_oargs; i++) {
1834: arg = args[i];
1835: ts = &s->temps[arg];
1836: reg = tcg_target_call_oarg_regs[i];
1837: assert(s->reg_to_temp[reg] == -1);
1838: if (ts->fixed_reg) {
1839: if (ts->reg != reg) {
1840: tcg_out_mov(s, ts->reg, reg);
1841: }
1842: } else {
1843: if (ts->val_type == TEMP_VAL_REG)
1844: s->reg_to_temp[ts->reg] = -1;
1845: ts->val_type = TEMP_VAL_REG;
1846: ts->reg = reg;
1847: ts->mem_coherent = 0;
1848: s->reg_to_temp[reg] = arg;
1849: }
1850: }
1851:
1852: return nb_iargs + nb_oargs + def->nb_cargs + 1;
1853: }
1854:
1855: #ifdef CONFIG_PROFILER
1856:
1857: static int64_t tcg_table_op_count[NB_OPS];
1858:
1859: void dump_op_count(void)
1860: {
1861: int i;
1862: FILE *f;
1863: f = fopen("/tmp/op.log", "w");
1864: for(i = INDEX_op_end; i < NB_OPS; i++) {
1865: fprintf(f, "%s %" PRId64 "\n", tcg_op_defs[i].name, tcg_table_op_count[i]);
1866: }
1867: fclose(f);
1868: }
1869: #endif
1870:
1871:
1872: static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf,
1873: long search_pc)
1874: {
1875: int opc, op_index;
1876: const TCGOpDef *def;
1877: unsigned int dead_iargs;
1878: const TCGArg *args;
1879:
1880: #ifdef DEBUG_DISAS
1881: if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) {
1882: qemu_log("OP:\n");
1883: tcg_dump_ops(s, logfile);
1884: qemu_log("\n");
1885: }
1886: #endif
1887:
1888: #ifdef CONFIG_PROFILER
1889: s->la_time -= profile_getclock();
1890: #endif
1891: tcg_liveness_analysis(s);
1892: #ifdef CONFIG_PROFILER
1893: s->la_time += profile_getclock();
1894: #endif
1895:
1896: #ifdef DEBUG_DISAS
1897: if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP_OPT))) {
1898: qemu_log("OP after la:\n");
1899: tcg_dump_ops(s, logfile);
1900: qemu_log("\n");
1901: }
1902: #endif
1903:
1904: tcg_reg_alloc_start(s);
1905:
1906: s->code_buf = gen_code_buf;
1907: s->code_ptr = gen_code_buf;
1908:
1909: args = gen_opparam_buf;
1910: op_index = 0;
1911:
1912: for(;;) {
1913: opc = gen_opc_buf[op_index];
1914: #ifdef CONFIG_PROFILER
1915: tcg_table_op_count[opc]++;
1916: #endif
1917: def = &tcg_op_defs[opc];
1918: #if 0
1919: printf("%s: %d %d %d\n", def->name,
1920: def->nb_oargs, def->nb_iargs, def->nb_cargs);
1921: // dump_regs(s);
1922: #endif
1923: switch(opc) {
1924: case INDEX_op_mov_i32:
1925: #if TCG_TARGET_REG_BITS == 64
1926: case INDEX_op_mov_i64:
1927: #endif
1928: dead_iargs = s->op_dead_iargs[op_index];
1929: tcg_reg_alloc_mov(s, def, args, dead_iargs);
1930: break;
1931: case INDEX_op_movi_i32:
1932: #if TCG_TARGET_REG_BITS == 64
1933: case INDEX_op_movi_i64:
1934: #endif
1935: tcg_reg_alloc_movi(s, args);
1936: break;
1937: case INDEX_op_debug_insn_start:
1938: /* debug instruction */
1939: break;
1940: case INDEX_op_nop:
1941: case INDEX_op_nop1:
1942: case INDEX_op_nop2:
1943: case INDEX_op_nop3:
1944: break;
1945: case INDEX_op_nopn:
1946: args += args[0];
1947: goto next;
1948: case INDEX_op_discard:
1949: {
1950: TCGTemp *ts;
1951: ts = &s->temps[args[0]];
1952: /* mark the temporary as dead */
1953: if (!ts->fixed_reg) {
1954: if (ts->val_type == TEMP_VAL_REG)
1955: s->reg_to_temp[ts->reg] = -1;
1956: ts->val_type = TEMP_VAL_DEAD;
1957: }
1958: }
1959: break;
1960: case INDEX_op_set_label:
1961: tcg_reg_alloc_bb_end(s, s->reserved_regs);
1962: tcg_out_label(s, args[0], (long)s->code_ptr);
1963: break;
1964: case INDEX_op_call:
1965: dead_iargs = s->op_dead_iargs[op_index];
1966: args += tcg_reg_alloc_call(s, def, opc, args, dead_iargs);
1967: goto next;
1968: case INDEX_op_end:
1969: goto the_end;
1970: default:
1971: /* Note: in order to speed up the code, it would be much
1972: faster to have specialized register allocator functions for
1973: some common argument patterns */
1974: dead_iargs = s->op_dead_iargs[op_index];
1975: tcg_reg_alloc_op(s, def, opc, args, dead_iargs);
1976: break;
1977: }
1978: args += def->nb_args;
1979: next:
1980: if (search_pc >= 0 && search_pc < s->code_ptr - gen_code_buf) {
1981: return op_index;
1982: }
1983: op_index++;
1984: #ifndef NDEBUG
1985: check_regs(s);
1986: #endif
1987: }
1988: the_end:
1989: return -1;
1990: }
1991:
1992: int tcg_gen_code(TCGContext *s, uint8_t *gen_code_buf)
1993: {
1994: #ifdef CONFIG_PROFILER
1995: {
1996: int n;
1997: n = (gen_opc_ptr - gen_opc_buf);
1998: s->op_count += n;
1999: if (n > s->op_count_max)
2000: s->op_count_max = n;
2001:
2002: s->temp_count += s->nb_temps;
2003: if (s->nb_temps > s->temp_count_max)
2004: s->temp_count_max = s->nb_temps;
2005: }
2006: #endif
2007:
2008: tcg_gen_code_common(s, gen_code_buf, -1);
2009:
2010: /* flush instruction cache */
2011: flush_icache_range((unsigned long)gen_code_buf,
2012: (unsigned long)s->code_ptr);
2013: return s->code_ptr - gen_code_buf;
2014: }
2015:
2016: /* Return the index of the micro operation such as the pc after is <
2017: offset bytes from the start of the TB. The contents of gen_code_buf must
2018: not be changed, though writing the same values is ok.
2019: Return -1 if not found. */
2020: int tcg_gen_code_search_pc(TCGContext *s, uint8_t *gen_code_buf, long offset)
2021: {
2022: return tcg_gen_code_common(s, gen_code_buf, offset);
2023: }
2024:
2025: #ifdef CONFIG_PROFILER
2026: void tcg_dump_info(FILE *f,
2027: int (*cpu_fprintf)(FILE *f, const char *fmt, ...))
2028: {
2029: TCGContext *s = &tcg_ctx;
2030: int64_t tot;
2031:
2032: tot = s->interm_time + s->code_time;
2033: cpu_fprintf(f, "JIT cycles %" PRId64 " (%0.3f s at 2.4 GHz)\n",
2034: tot, tot / 2.4e9);
2035: cpu_fprintf(f, "translated TBs %" PRId64 " (aborted=%" PRId64 " %0.1f%%)\n",
2036: s->tb_count,
2037: s->tb_count1 - s->tb_count,
2038: s->tb_count1 ? (double)(s->tb_count1 - s->tb_count) / s->tb_count1 * 100.0 : 0);
2039: cpu_fprintf(f, "avg ops/TB %0.1f max=%d\n",
2040: s->tb_count ? (double)s->op_count / s->tb_count : 0, s->op_count_max);
2041: cpu_fprintf(f, "deleted ops/TB %0.2f\n",
2042: s->tb_count ?
2043: (double)s->del_op_count / s->tb_count : 0);
2044: cpu_fprintf(f, "avg temps/TB %0.2f max=%d\n",
2045: s->tb_count ?
2046: (double)s->temp_count / s->tb_count : 0,
2047: s->temp_count_max);
2048:
2049: cpu_fprintf(f, "cycles/op %0.1f\n",
2050: s->op_count ? (double)tot / s->op_count : 0);
2051: cpu_fprintf(f, "cycles/in byte %0.1f\n",
2052: s->code_in_len ? (double)tot / s->code_in_len : 0);
2053: cpu_fprintf(f, "cycles/out byte %0.1f\n",
2054: s->code_out_len ? (double)tot / s->code_out_len : 0);
2055: if (tot == 0)
2056: tot = 1;
2057: cpu_fprintf(f, " gen_interm time %0.1f%%\n",
2058: (double)s->interm_time / tot * 100.0);
2059: cpu_fprintf(f, " gen_code time %0.1f%%\n",
2060: (double)s->code_time / tot * 100.0);
2061: cpu_fprintf(f, "liveness/code time %0.1f%%\n",
2062: (double)s->la_time / (s->code_time ? s->code_time : 1) * 100.0);
2063: cpu_fprintf(f, "cpu_restore count %" PRId64 "\n",
2064: s->restore_count);
2065: cpu_fprintf(f, " avg cycles %0.1f\n",
2066: s->restore_count ? (double)s->restore_time / s->restore_count : 0);
2067: {
2068: extern void dump_op_count(void);
2069: dump_op_count();
2070: }
2071: }
2072: #else
2073: void tcg_dump_info(FILE *f,
2074: int (*cpu_fprintf)(FILE *f, const char *fmt, ...))
2075: {
2076: cpu_fprintf(f, "[TCG profiler not compiled]\n");
2077: }
2078: #endif
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