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Sun, 02 May 2021 07:44:27 -0700 (PDT) Received: from localhost.localdomain ([71.212.144.24]) by smtp.gmail.com with ESMTPSA id w14sm6889110pff.94.2021.05.02.07.44.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 02 May 2021 07:44:26 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PULL v2 10/31] Hexagon (target/hexagon) properly generate TB end for DISAS_NORETURN Date: Sun, 2 May 2021 07:43:58 -0700 Message-Id: <20210502144419.1659844-11-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210502144419.1659844-1-richard.henderson@linaro.org> References: <20210502144419.1659844-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::436; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x436.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: peter.maydell@linaro.org, Taylor Simpson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Taylor Simpson When exiting a TB, generate all the code before returning from hexagon_tr_translate_packet so that nothing needs to be done in hexagon_tr_tb_stop. Suggested-by: Richard Henderson Signed-off-by: Taylor Simpson Reviewed-by: Richard Henderson Message-Id: <1617930474-31979-6-git-send-email-tsimpson@quicinc.com> Signed-off-by: Richard Henderson --- target/hexagon/translate.h | 3 -- target/hexagon/translate.c | 62 ++++++++++++++++++++------------------ 2 files changed, 33 insertions(+), 32 deletions(-) diff --git a/target/hexagon/translate.h b/target/hexagon/translate.h index 938f7fbb9f..12506c8caf 100644 --- a/target/hexagon/translate.h +++ b/target/hexagon/translate.h @@ -86,8 +86,5 @@ extern TCGv hex_llsc_addr; extern TCGv hex_llsc_val; extern TCGv_i64 hex_llsc_val_i64; -void gen_exception(int excp); -void gen_exception_debug(void); - void process_store(DisasContext *ctx, Packet *pkt, int slot_num); #endif diff --git a/target/hexagon/translate.c b/target/hexagon/translate.c index e235fdb315..9f2a531969 100644 --- a/target/hexagon/translate.c +++ b/target/hexagon/translate.c @@ -54,16 +54,40 @@ static const char * const hexagon_prednames[] = { "p0", "p1", "p2", "p3" }; -void gen_exception(int excp) +static void gen_exception_raw(int excp) { TCGv_i32 helper_tmp = tcg_const_i32(excp); gen_helper_raise_exception(cpu_env, helper_tmp); tcg_temp_free_i32(helper_tmp); } -void gen_exception_debug(void) +static void gen_exec_counters(DisasContext *ctx) { - gen_exception(EXCP_DEBUG); + tcg_gen_addi_tl(hex_gpr[HEX_REG_QEMU_PKT_CNT], + hex_gpr[HEX_REG_QEMU_PKT_CNT], ctx->num_packets); + tcg_gen_addi_tl(hex_gpr[HEX_REG_QEMU_INSN_CNT], + hex_gpr[HEX_REG_QEMU_INSN_CNT], ctx->num_insns); +} + +static void gen_end_tb(DisasContext *ctx) +{ + gen_exec_counters(ctx); + tcg_gen_mov_tl(hex_gpr[HEX_REG_PC], hex_next_PC); + if (ctx->base.singlestep_enabled) { + gen_exception_raw(EXCP_DEBUG); + } else { + tcg_gen_exit_tb(NULL, 0); + } + ctx->base.is_jmp = DISAS_NORETURN; +} + +static void gen_exception_end_tb(DisasContext *ctx, int excp) +{ + gen_exec_counters(ctx); + tcg_gen_mov_tl(hex_gpr[HEX_REG_PC], hex_next_PC); + gen_exception_raw(excp); + ctx->base.is_jmp = DISAS_NORETURN; + } #if HEX_DEBUG @@ -225,8 +249,7 @@ static void gen_insn(CPUHexagonState *env, DisasContext *ctx, mark_implicit_writes(ctx, insn); insn->generate(env, ctx, insn, pkt); } else { - gen_exception(HEX_EXCP_INVALID_OPCODE); - ctx->base.is_jmp = DISAS_NORETURN; + gen_exception_end_tb(ctx, HEX_EXCP_INVALID_OPCODE); } } @@ -447,14 +470,6 @@ static void update_exec_counters(DisasContext *ctx, Packet *pkt) ctx->num_insns += num_real_insns; } -static void gen_exec_counters(DisasContext *ctx) -{ - tcg_gen_addi_tl(hex_gpr[HEX_REG_QEMU_PKT_CNT], - hex_gpr[HEX_REG_QEMU_PKT_CNT], ctx->num_packets); - tcg_gen_addi_tl(hex_gpr[HEX_REG_QEMU_INSN_CNT], - hex_gpr[HEX_REG_QEMU_INSN_CNT], ctx->num_insns); -} - static void gen_commit_packet(DisasContext *ctx, Packet *pkt) { gen_reg_writes(ctx); @@ -478,7 +493,7 @@ static void gen_commit_packet(DisasContext *ctx, Packet *pkt) #endif if (pkt->pkt_has_cof) { - ctx->base.is_jmp = DISAS_NORETURN; + gen_end_tb(ctx); } } @@ -491,8 +506,7 @@ static void decode_and_translate_packet(CPUHexagonState *env, DisasContext *ctx) nwords = read_packet_words(env, ctx, words); if (!nwords) { - gen_exception(HEX_EXCP_INVALID_PACKET); - ctx->base.is_jmp = DISAS_NORETURN; + gen_exception_end_tb(ctx, HEX_EXCP_INVALID_PACKET); return; } @@ -505,8 +519,7 @@ static void decode_and_translate_packet(CPUHexagonState *env, DisasContext *ctx) gen_commit_packet(ctx, &pkt); ctx->base.pc_next += pkt.encod_pkt_size_in_bytes; } else { - gen_exception(HEX_EXCP_INVALID_PACKET); - ctx->base.is_jmp = DISAS_NORETURN; + gen_exception_end_tb(ctx, HEX_EXCP_INVALID_PACKET); } } @@ -536,9 +549,7 @@ static bool hexagon_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu, { DisasContext *ctx = container_of(dcbase, DisasContext, base); - tcg_gen_movi_tl(hex_gpr[HEX_REG_PC], ctx->base.pc_next); - ctx->base.is_jmp = DISAS_NORETURN; - gen_exception_debug(); + gen_exception_end_tb(ctx, EXCP_DEBUG); /* * The address covered by the breakpoint must be included in * [tb->pc, tb->pc + tb->size) in order to for it to be @@ -601,19 +612,12 @@ static void hexagon_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu) gen_exec_counters(ctx); tcg_gen_movi_tl(hex_gpr[HEX_REG_PC], ctx->base.pc_next); if (ctx->base.singlestep_enabled) { - gen_exception_debug(); + gen_exception_raw(EXCP_DEBUG); } else { tcg_gen_exit_tb(NULL, 0); } break; case DISAS_NORETURN: - gen_exec_counters(ctx); - tcg_gen_mov_tl(hex_gpr[HEX_REG_PC], hex_next_PC); - if (ctx->base.singlestep_enabled) { - gen_exception_debug(); - } else { - tcg_gen_exit_tb(NULL, 0); - } break; default: g_assert_not_reached(); -- 2.25.1