gen_intermediate_code_internal(M68kCPU *cpu, TranslationBlock *tb, bool search_pc) { CPUState *cs = CPU(cpu); CPUM68KState *env = &cpu->env; DisasContext dc1, *dc = &dc1; uint16_t *gen_opc_end; CPUBreakpoint *bp; int j, lj; target_ulong pc_start; int pc_offset; int num_insns; int max_insns; /* generate intermediate code */ pc_start = tb->pc; dc->tb = tb; gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE; dc->env = env; dc->is_jmp = DISAS_NEXT; dc->pc = pc_start; dc->cc_op = CC_OP_DYNAMIC; dc->singlestep_enabled = cs->singlestep_enabled; dc->fpcr = env->fpcr; dc->user = (env->sr & SR_S) == 0; dc->is_mem = 0; dc->done_mac = 0; lj = -1; num_insns = 0; max_insns = tb->cflags & CF_COUNT_MASK; if (max_insns == 0) max_insns = CF_COUNT_MASK; gen_tb_start(); do { pc_offset = dc->pc - pc_start; gen_throws_exception = NULL; if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) { QTAILQ_FOREACH(bp, &cs->breakpoints, entry) { if (bp->pc == dc->pc) { gen_exception(dc, dc->pc, EXCP_DEBUG); dc->is_jmp = DISAS_JUMP; break; } } if (dc->is_jmp) break; } if (search_pc) { j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; if (lj < j) { lj++; while (lj < j) tcg_ctx.gen_opc_instr_start[lj++] = 0; } tcg_ctx.gen_opc_pc[lj] = dc->pc; tcg_ctx.gen_opc_instr_start[lj] = 1; tcg_ctx.gen_opc_icount[lj] = num_insns; } if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) gen_io_start(); dc->insn_pc = dc->pc; disas_m68k_insn(env, dc); num_insns++; } while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end && !cs->singlestep_enabled && !singlestep && (pc_offset) < (TARGET_PAGE_SIZE - 32) && num_insns < max_insns); if (tb->cflags & CF_LAST_IO) gen_io_end(); if (unlikely(cs->singlestep_enabled)) { /* Make sure the pc is updated, and raise a debug exception. */ if (!dc->is_jmp) { gen_flush_cc_op(dc); tcg_gen_movi_i32(QREG_PC, dc->pc); } gen_helper_raise_exception(cpu_env, tcg_const_i32(EXCP_DEBUG)); } else { switch(dc->is_jmp) { case DISAS_NEXT: gen_flush_cc_op(dc); gen_jmp_tb(dc, 0, dc->pc); break; default: case DISAS_JUMP: case DISAS_UPDATE: gen_flush_cc_op(dc); /* indicate that the hash table must be used to find the next TB */ tcg_gen_exit_tb(0); break; case DISAS_TB_JUMP: /* nothing more to generate */ break; } } gen_tb_end(tb, num_insns); *tcg_ctx.gen_opc_ptr = INDEX_op_end; #ifdef DEBUG_DISAS if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) { qemu_log("----------------\n"); qemu_log("IN: %s\n", lookup_symbol(pc_start)); log_target_disas(env, pc_start, dc->pc - pc_start, 0); qemu_log("\n"); } #endif if (search_pc) { j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; lj++; while (lj <= j) tcg_ctx.gen_opc_instr_start[lj++] = 0; } else { tb->size = dc->pc - pc_start; tb->icount = num_insns; } //optimize_flags(); //expand_target_qops(); }