diff options
Diffstat (limited to 'tcg/tcg.c')
| -rw-r--r-- | tcg/tcg.c | 168 |
1 files changed, 99 insertions, 69 deletions
diff --git a/tcg/tcg.c b/tcg/tcg.c index a2cb027a14..682af8a7c6 100644 --- a/tcg/tcg.c +++ b/tcg/tcg.c @@ -363,17 +363,39 @@ void tcg_context_init(TCGContext *s) void tcg_prologue_init(TCGContext *s) { - /* init global prologue and epilogue */ - s->code_buf = s->code_gen_prologue; - s->code_ptr = s->code_buf; + size_t prologue_size, total_size; + void *buf0, *buf1; + + /* Put the prologue at the beginning of code_gen_buffer. */ + buf0 = s->code_gen_buffer; + s->code_ptr = buf0; + s->code_buf = buf0; + s->code_gen_prologue = buf0; + + /* Generate the prologue. */ tcg_target_qemu_prologue(s); - flush_icache_range((uintptr_t)s->code_buf, (uintptr_t)s->code_ptr); + buf1 = s->code_ptr; + flush_icache_range((uintptr_t)buf0, (uintptr_t)buf1); + + /* Deduct the prologue from the buffer. */ + prologue_size = tcg_current_code_size(s); + s->code_gen_ptr = buf1; + s->code_gen_buffer = buf1; + s->code_buf = buf1; + total_size = s->code_gen_buffer_size - prologue_size; + s->code_gen_buffer_size = total_size; + + /* Compute a high-water mark, at which we voluntarily flush the buffer + and start over. The size here is arbitrary, significantly larger + than we expect the code generation for any one opcode to require. */ + s->code_gen_highwater = s->code_gen_buffer + (total_size - 1024); + + tcg_register_jit(s->code_gen_buffer, total_size); #ifdef DEBUG_DISAS if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) { - size_t size = tcg_current_code_size(s); - qemu_log("PROLOGUE: [size=%zu]\n", size); - log_disas(s->code_buf, size); + qemu_log("PROLOGUE: [size=%zu]\n", prologue_size); + log_disas(buf0, prologue_size); qemu_log("\n"); qemu_log_flush(); } @@ -990,17 +1012,18 @@ void tcg_dump_ops(TCGContext *s) def = &tcg_op_defs[c]; args = &s->gen_opparam_buf[op->args]; - if (c == INDEX_op_debug_insn_start) { - uint64_t pc; + if (c == INDEX_op_insn_start) { + qemu_log("%s ----", oi != s->gen_first_op_idx ? "\n" : ""); + + for (i = 0; i < TARGET_INSN_START_WORDS; ++i) { + target_ulong a; #if TARGET_LONG_BITS > TCG_TARGET_REG_BITS - pc = ((uint64_t)args[1] << 32) | args[0]; + a = ((target_ulong)args[i * 2 + 1] << 32) | args[i * 2]; #else - pc = args[0]; + a = args[i]; #endif - if (oi != s->gen_first_op_idx) { - qemu_log("\n"); + qemu_log(" " TARGET_FMT_lx, a); } - qemu_log(" ---- 0x%" PRIx64, pc); } else if (c == INDEX_op_call) { /* variable number of arguments */ nb_oargs = op->callo; @@ -1400,7 +1423,7 @@ static void tcg_liveness_analysis(TCGContext *s) } } break; - case INDEX_op_debug_insn_start: + case INDEX_op_insn_start: break; case INDEX_op_discard: /* mark the temporary as dead */ @@ -2289,11 +2312,27 @@ void tcg_dump_op_count(FILE *f, fprintf_function cpu_fprintf) #endif -static inline int tcg_gen_code_common(TCGContext *s, - tcg_insn_unit *gen_code_buf, - long search_pc) +int tcg_gen_code(TCGContext *s, tcg_insn_unit *gen_code_buf) { - int oi, oi_next; + int i, oi, oi_next, num_insns; + +#ifdef CONFIG_PROFILER + { + int n; + + n = s->gen_last_op_idx + 1; + s->op_count += n; + if (n > s->op_count_max) { + s->op_count_max = n; + } + + n = s->nb_temps; + s->temp_count += n; + if (n > s->temp_count_max) { + s->temp_count_max = n; + } + } +#endif #ifdef DEBUG_DISAS if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) { @@ -2337,6 +2376,7 @@ static inline int tcg_gen_code_common(TCGContext *s, tcg_out_tb_init(s); + num_insns = -1; for (oi = s->gen_first_op_idx; oi >= 0; oi = oi_next) { TCGOp * const op = &s->gen_op_buf[oi]; TCGArg * const args = &s->gen_opparam_buf[op->args]; @@ -2359,7 +2399,20 @@ static inline int tcg_gen_code_common(TCGContext *s, case INDEX_op_movi_i64: tcg_reg_alloc_movi(s, args, dead_args, sync_args); break; - case INDEX_op_debug_insn_start: + case INDEX_op_insn_start: + if (num_insns >= 0) { + s->gen_insn_end_off[num_insns] = tcg_current_code_size(s); + } + num_insns++; + for (i = 0; i < TARGET_INSN_START_WORDS; ++i) { + target_ulong a; +#if TARGET_LONG_BITS > TCG_TARGET_REG_BITS + a = ((target_ulong)args[i * 2 + 1] << 32) | args[i * 2]; +#else + a = args[i]; +#endif + s->gen_insn_data[num_insns][i] = a; + } break; case INDEX_op_discard: temp_dead(s, args[0]); @@ -2383,40 +2436,22 @@ static inline int tcg_gen_code_common(TCGContext *s, tcg_reg_alloc_op(s, def, opc, args, dead_args, sync_args); break; } - if (search_pc >= 0 && search_pc < tcg_current_code_size(s)) { - return oi; - } #ifndef NDEBUG check_regs(s); #endif + /* Test for (pending) buffer overflow. The assumption is that any + one operation beginning below the high water mark cannot overrun + the buffer completely. Thus we can test for overflow after + generating code without having to check during generation. */ + if (unlikely(s->code_gen_ptr > s->code_gen_highwater)) { + return -1; + } } + tcg_debug_assert(num_insns >= 0); + s->gen_insn_end_off[num_insns] = tcg_current_code_size(s); /* Generate TB finalization at the end of block */ tcg_out_tb_finalize(s); - return -1; -} - -int tcg_gen_code(TCGContext *s, tcg_insn_unit *gen_code_buf) -{ -#ifdef CONFIG_PROFILER - { - int n; - - n = s->gen_last_op_idx + 1; - s->op_count += n; - if (n > s->op_count_max) { - s->op_count_max = n; - } - - n = s->nb_temps; - s->temp_count += n; - if (n > s->temp_count_max) { - s->temp_count_max = n; - } - } -#endif - - tcg_gen_code_common(s, gen_code_buf, -1); /* flush instruction cache */ flush_icache_range((uintptr_t)s->code_buf, (uintptr_t)s->code_ptr); @@ -2424,38 +2459,30 @@ int tcg_gen_code(TCGContext *s, tcg_insn_unit *gen_code_buf) return tcg_current_code_size(s); } -/* Return the index of the micro operation such as the pc after is < - offset bytes from the start of the TB. The contents of gen_code_buf must - not be changed, though writing the same values is ok. - Return -1 if not found. */ -int tcg_gen_code_search_pc(TCGContext *s, tcg_insn_unit *gen_code_buf, - long offset) -{ - return tcg_gen_code_common(s, gen_code_buf, offset); -} - #ifdef CONFIG_PROFILER void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf) { TCGContext *s = &tcg_ctx; - int64_t tot; + int64_t tb_count = s->tb_count; + int64_t tb_div_count = tb_count ? tb_count : 1; + int64_t tot = s->interm_time + s->code_time; - tot = s->interm_time + s->code_time; cpu_fprintf(f, "JIT cycles %" PRId64 " (%0.3f s at 2.4 GHz)\n", tot, tot / 2.4e9); cpu_fprintf(f, "translated TBs %" PRId64 " (aborted=%" PRId64 " %0.1f%%)\n", - s->tb_count, - s->tb_count1 - s->tb_count, - s->tb_count1 ? (double)(s->tb_count1 - s->tb_count) / s->tb_count1 * 100.0 : 0); + tb_count, s->tb_count1 - tb_count, + (double)(s->tb_count1 - s->tb_count) + / (s->tb_count1 ? s->tb_count1 : 1) * 100.0); cpu_fprintf(f, "avg ops/TB %0.1f max=%d\n", - s->tb_count ? (double)s->op_count / s->tb_count : 0, s->op_count_max); + (double)s->op_count / tb_div_count, s->op_count_max); cpu_fprintf(f, "deleted ops/TB %0.2f\n", - s->tb_count ? - (double)s->del_op_count / s->tb_count : 0); + (double)s->del_op_count / tb_div_count); cpu_fprintf(f, "avg temps/TB %0.2f max=%d\n", - s->tb_count ? - (double)s->temp_count / s->tb_count : 0, - s->temp_count_max); + (double)s->temp_count / tb_div_count, s->temp_count_max); + cpu_fprintf(f, "avg host code/TB %0.1f\n", + (double)s->code_out_len / tb_div_count); + cpu_fprintf(f, "avg search data/TB %0.1f\n", + (double)s->search_out_len / tb_div_count); cpu_fprintf(f, "cycles/op %0.1f\n", s->op_count ? (double)tot / s->op_count : 0); @@ -2463,8 +2490,11 @@ void tcg_dump_info(FILE *f, fprintf_function cpu_fprintf) s->code_in_len ? (double)tot / s->code_in_len : 0); cpu_fprintf(f, "cycles/out byte %0.1f\n", s->code_out_len ? (double)tot / s->code_out_len : 0); - if (tot == 0) + cpu_fprintf(f, "cycles/search byte %0.1f\n", + s->search_out_len ? (double)tot / s->search_out_len : 0); + if (tot == 0) { tot = 1; + } cpu_fprintf(f, " gen_interm time %0.1f%%\n", (double)s->interm_time / tot * 100.0); cpu_fprintf(f, " gen_code time %0.1f%%\n", |