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Sun, 20 Jun 2021 14:32:53 -0700 (PDT) Received: from localhost.localdomain ([71.212.149.176]) by smtp.gmail.com with ESMTPSA id w21sm13608329pfq.143.2021.06.20.14.32.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 20 Jun 2021 14:32:53 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 06/11] target/cris: Convert to TranslatorOps Date: Sun, 20 Jun 2021 14:32:44 -0700 Message-Id: <20210620213249.1494274-7-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210620213249.1494274-1-richard.henderson@linaro.org> References: <20210620213249.1494274-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::534; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x534.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: edgar.iglesias@gmail.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Richard Henderson --- target/cris/translate.c | 313 ++++++++++++++++++++++------------------ 1 file changed, 170 insertions(+), 143 deletions(-) diff --git a/target/cris/translate.c b/target/cris/translate.c index 9e1f2f9239..f6d1fa914f 100644 --- a/target/cris/translate.c +++ b/target/cris/translate.c @@ -3114,17 +3114,12 @@ static unsigned int crisv32_decoder(CPUCRISState *env, DisasContext *dc) * */ -/* generate intermediate code for basic block 'tb'. */ -void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns) +static void cris_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs) { + DisasContext *dc = container_of(dcbase, DisasContext, base); CPUCRISState *env = cs->env_ptr; + uint32_t tb_flags = dc->base.tb->flags; uint32_t pc_start; - unsigned int insn_len; - struct DisasContext ctx; - struct DisasContext *dc = &ctx; - uint32_t page_start; - target_ulong npc; - int num_insns; if (env->pregs[PR_VR] == 32) { dc->decoder = crisv32_decoder; @@ -3134,150 +3129,170 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns) dc->clear_locked_irq = 1; } - /* Odd PC indicates that branch is rexecuting due to exception in the + /* + * Odd PC indicates that branch is rexecuting due to exception in the * delayslot, like in real hw. */ - pc_start = tb->pc & ~1; - - dc->base.tb = tb; + pc_start = dc->base.pc_first & ~1; dc->base.pc_first = pc_start; dc->base.pc_next = pc_start; - dc->base.is_jmp = DISAS_NEXT; - dc->base.singlestep_enabled = cs->singlestep_enabled; dc->cpu = env_archcpu(env); dc->ppc = pc_start; dc->pc = pc_start; dc->flags_uptodate = 1; dc->flagx_known = 1; - dc->flags_x = tb->flags & X_FLAG; + dc->flags_x = tb_flags & X_FLAG; dc->cc_x_uptodate = 0; dc->cc_mask = 0; dc->update_cc = 0; dc->clear_prefix = 0; + dc->cpustate_changed = 0; cris_update_cc_op(dc, CC_OP_FLAGS, 4); dc->cc_size_uptodate = -1; /* Decode TB flags. */ - dc->tb_flags = tb->flags & (S_FLAG | P_FLAG | U_FLAG \ - | X_FLAG | PFIX_FLAG); - dc->delayed_branch = !!(tb->flags & 7); + dc->tb_flags = tb_flags & (S_FLAG | P_FLAG | U_FLAG | X_FLAG | PFIX_FLAG); + dc->delayed_branch = !!(tb_flags & 7); if (dc->delayed_branch) { dc->jmp = JMP_INDIRECT; } else { dc->jmp = JMP_NOJMP; } +} - dc->cpustate_changed = 0; +static void cris_tr_tb_start(DisasContextBase *db, CPUState *cpu) +{ +} - page_start = pc_start & TARGET_PAGE_MASK; - num_insns = 0; +static void cris_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu) +{ + DisasContext *dc = container_of(dcbase, DisasContext, base); - gen_tb_start(tb); - do { - tcg_gen_insn_start(dc->delayed_branch == 1 - ? dc->ppc | 1 : dc->pc); - num_insns++; + tcg_gen_insn_start(dc->delayed_branch == 1 ? dc->ppc | 1 : dc->pc); +} - if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) { +static bool cris_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu, + const CPUBreakpoint *bp) +{ + DisasContext *dc = container_of(dcbase, DisasContext, base); + + cris_evaluate_flags(dc); + tcg_gen_movi_tl(env_pc, dc->pc); + t_gen_raise_exception(EXCP_DEBUG); + dc->base.is_jmp = DISAS_NORETURN; + /* + * The address covered by the breakpoint must be included in + * [tb->pc, tb->pc + tb->size) in order to for it to be + * properly cleared -- thus we increment the PC here so that + * the logic setting tb->size below does the right thing. + */ + dc->pc += 2; + return true; +} + +static void cris_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs) +{ + DisasContext *dc = container_of(dcbase, DisasContext, base); + CPUCRISState *env = cs->env_ptr; + unsigned int insn_len; + + /* Pretty disas. */ + LOG_DIS("%8.8x:\t", dc->pc); + + dc->clear_x = 1; + + insn_len = dc->decoder(env, dc); + dc->ppc = dc->pc; + dc->pc += insn_len; + dc->base.pc_next += insn_len; + + if (dc->clear_x) { + cris_clear_x_flag(dc); + } + + /* + * Check for delayed branches here. If we do it before + * actually generating any host code, the simulator will just + * loop doing nothing for on this program location. + */ + if (dc->delayed_branch && --dc->delayed_branch == 0) { + if (dc->base.tb->flags & 7) { + t_gen_movi_env_TN(dslot, 0); + } + + if (dc->cpustate_changed + || !dc->flagx_known + || (dc->flags_x != (dc->base.tb->flags & X_FLAG))) { + cris_store_direct_jmp(dc); + } + + if (dc->clear_locked_irq) { + dc->clear_locked_irq = 0; + t_gen_movi_env_TN(locked_irq, 0); + } + + if (dc->jmp == JMP_DIRECT_CC) { + TCGLabel *l1 = gen_new_label(); cris_evaluate_flags(dc); - tcg_gen_movi_tl(env_pc, dc->pc); - t_gen_raise_exception(EXCP_DEBUG); + + /* Conditional jmp. */ + tcg_gen_brcondi_tl(TCG_COND_EQ, env_btaken, 0, l1); + gen_goto_tb(dc, 1, dc->jmp_pc); + gen_set_label(l1); + gen_goto_tb(dc, 0, dc->pc); dc->base.is_jmp = DISAS_NORETURN; - /* The address covered by the breakpoint must be included in - [tb->pc, tb->pc + tb->size) in order to for it to be - properly cleared -- thus we increment the PC here so that - the logic setting tb->size below does the right thing. */ - dc->pc += 2; - break; + dc->jmp = JMP_NOJMP; + } else if (dc->jmp == JMP_DIRECT) { + cris_evaluate_flags(dc); + gen_goto_tb(dc, 0, dc->jmp_pc); + dc->base.is_jmp = DISAS_NORETURN; + dc->jmp = JMP_NOJMP; + } else { + TCGv c = tcg_const_tl(dc->pc); + t_gen_cc_jmp(env_btarget, c); + tcg_temp_free(c); + dc->base.is_jmp = DISAS_JUMP; } + } - /* Pretty disas. */ - LOG_DIS("%8.8x:\t", dc->pc); + /* Force an update if the per-tb cpu state has changed. */ + if (dc->base.is_jmp == DISAS_NEXT + && (dc->cpustate_changed + || !dc->flagx_known + || (dc->flags_x != (dc->base.tb->flags & X_FLAG)))) { + dc->base.is_jmp = DISAS_UPDATE; + tcg_gen_movi_tl(env_pc, dc->pc); + } - if (num_insns == max_insns && (tb_cflags(tb) & CF_LAST_IO)) { - gen_io_start(); - } - dc->clear_x = 1; + /* + * FIXME: Only the first insn in the TB should cross a page boundary. + * If we can detect the length of the next insn easily, we should. + * In the meantime, simply stop when we do cross. + */ + if (dc->base.is_jmp == DISAS_NEXT + && ((dc->pc ^ dc->base.pc_first) & TARGET_PAGE_MASK) != 0) { + dc->base.is_jmp = DISAS_TOO_MANY; + } +} - insn_len = dc->decoder(env, dc); - dc->ppc = dc->pc; - dc->pc += insn_len; - if (dc->clear_x) { - cris_clear_x_flag(dc); - } +static void cris_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu) +{ + DisasContext *dc = container_of(dcbase, DisasContext, base); + DisasJumpType is_jmp = dc->base.is_jmp; + target_ulong npc = dc->pc; - /* Check for delayed branches here. If we do it before - actually generating any host code, the simulator will just - loop doing nothing for on this program location. */ - if (dc->delayed_branch) { - dc->delayed_branch--; - if (dc->delayed_branch == 0) { - if (tb->flags & 7) { - t_gen_movi_env_TN(dslot, 0); - } - if (dc->cpustate_changed || !dc->flagx_known - || (dc->flags_x != (tb->flags & X_FLAG))) { - cris_store_direct_jmp(dc); - } - - if (dc->clear_locked_irq) { - dc->clear_locked_irq = 0; - t_gen_movi_env_TN(locked_irq, 0); - } - - if (dc->jmp == JMP_DIRECT_CC) { - TCGLabel *l1 = gen_new_label(); - cris_evaluate_flags(dc); - - /* Conditional jmp. */ - tcg_gen_brcondi_tl(TCG_COND_EQ, - env_btaken, 0, l1); - gen_goto_tb(dc, 1, dc->jmp_pc); - gen_set_label(l1); - gen_goto_tb(dc, 0, dc->pc); - dc->base.is_jmp = DISAS_NORETURN; - dc->jmp = JMP_NOJMP; - } else if (dc->jmp == JMP_DIRECT) { - cris_evaluate_flags(dc); - gen_goto_tb(dc, 0, dc->jmp_pc); - dc->base.is_jmp = DISAS_NORETURN; - dc->jmp = JMP_NOJMP; - } else { - TCGv c = tcg_const_tl(dc->pc); - t_gen_cc_jmp(env_btarget, c); - tcg_temp_free(c); - dc->base.is_jmp = DISAS_JUMP; - } - break; - } - } - - /* If we are rexecuting a branch due to exceptions on - delay slots don't break. */ - if (!(tb->pc & 1) && cs->singlestep_enabled) { - break; - } - } while (!dc->base.is_jmp && !dc->cpustate_changed - && !tcg_op_buf_full() - && !singlestep - && (dc->pc - page_start < TARGET_PAGE_SIZE) - && num_insns < max_insns); + if (is_jmp == DISAS_NORETURN) { + /* If we have a broken branch+delayslot sequence, it's too late. */ + assert(dc->delayed_branch != 1); + return; + } if (dc->clear_locked_irq) { t_gen_movi_env_TN(locked_irq, 0); } - npc = dc->pc; - - /* Force an update if the per-tb cpu state has changed. */ - if (dc->base.is_jmp == DISAS_NEXT - && (dc->cpustate_changed || !dc->flagx_known - || (dc->flags_x != (tb->flags & X_FLAG)))) { - dc->base.is_jmp = DISAS_UPDATE; - tcg_gen_movi_tl(env_pc, npc); - } /* Broken branch+delayslot sequence. */ if (dc->delayed_branch == 1) { /* Set env->dslot to the size of the branch insn. */ @@ -3287,45 +3302,57 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns) cris_evaluate_flags(dc); - if (unlikely(cs->singlestep_enabled)) { - if (dc->base.is_jmp == DISAS_NEXT) { + if (unlikely(dc->base.singlestep_enabled)) { + switch (is_jmp) { + case DISAS_TOO_MANY: tcg_gen_movi_tl(env_pc, npc); - } - t_gen_raise_exception(EXCP_DEBUG); - } else { - switch (dc->base.is_jmp) { - case DISAS_NEXT: - gen_goto_tb(dc, 1, npc); - break; - default: + /* fall through */ case DISAS_JUMP: case DISAS_UPDATE: - /* indicate that the hash table must be used - to find the next TB */ - tcg_gen_exit_tb(NULL, 0); - break; - case DISAS_NORETURN: - /* nothing more to generate */ + t_gen_raise_exception(EXCP_DEBUG); + return; + default: break; } + g_assert_not_reached(); } - gen_tb_end(tb, num_insns); - tb->size = dc->pc - pc_start; - tb->icount = num_insns; - -#ifdef DEBUG_DISAS -#if !DISAS_CRIS - if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM) - && qemu_log_in_addr_range(pc_start)) { - FILE *logfile = qemu_log_lock(); - qemu_log("--------------\n"); - qemu_log("IN: %s\n", lookup_symbol(pc_start)); - log_target_disas(cs, pc_start, dc->pc - pc_start); - qemu_log_unlock(logfile); + switch (is_jmp) { + case DISAS_TOO_MANY: + gen_goto_tb(dc, 0, npc); + break; + case DISAS_JUMP: + case DISAS_UPDATE: + /* Indicate that interupts must be re-evaluated before the next TB. */ + tcg_gen_exit_tb(NULL, 0); + break; + default: + g_assert_not_reached(); } -#endif -#endif +} + +static void cris_tr_disas_log(const DisasContextBase *dcbase, CPUState *cpu) +{ + if (!DISAS_CRIS) { + qemu_log("IN: %s\n", lookup_symbol(dcbase->pc_first)); + log_target_disas(cpu, dcbase->pc_first, dcbase->tb->size); + } +} + +static const TranslatorOps cris_tr_ops = { + .init_disas_context = cris_tr_init_disas_context, + .tb_start = cris_tr_tb_start, + .insn_start = cris_tr_insn_start, + .breakpoint_check = cris_tr_breakpoint_check, + .translate_insn = cris_tr_translate_insn, + .tb_stop = cris_tr_tb_stop, + .disas_log = cris_tr_disas_log, +}; + +void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns) +{ + DisasContext dc; + translator_loop(&cris_tr_ops, &dc.base, cs, tb, max_insns); } void cris_cpu_dump_state(CPUState *cs, FILE *f, int flags) -- 2.25.1