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Mon, 06 May 2024 01:10:17 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHpbxjPHEq7Q45qExuVM63j45ASuzO9nj5f6dRct9GLPsiRLOXbEZvbY+gGYosf5volDDVgOw== X-Received: by 2002:a17:907:728a:b0:a59:b17c:c9d2 with SMTP id dt10-20020a170907728a00b00a59b17cc9d2mr4369660ejc.12.1714983017565; Mon, 06 May 2024 01:10:17 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: richard.henderson@linaro.org, zhao1.liu@intel.com Subject: [PATCH v2 06/25] target/i386: pull cc_op update to callers of gen_jmp_rel{, _csize} Date: Mon, 6 May 2024 10:09:38 +0200 Message-ID: <20240506080957.10005-7-pbonzini@redhat.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20240506080957.10005-1-pbonzini@redhat.com> References: <20240506080957.10005-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.431, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1714983057408100001 Content-Type: text/plain; charset="utf-8" gen_update_cc_op must be called before control flow splits. Doing it in gen_jmp_rel{,_csize} may hide bugs, instead assert that cc_op is clean---even if that means a few more calls to gen_update_cc_op(). With this new invariant, setting cc_op to CC_OP_DYNAMIC is unnecessary since the caller should have done it. Signed-off-by: Paolo Bonzini Reviewed-by: Richard Henderson --- target/i386/tcg/translate.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index 6b766f5dd3f..17bf85da0ce 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -2852,6 +2852,8 @@ static void gen_jmp_rel(DisasContext *s, MemOp ot, in= t diff, int tb_num) target_ulong new_pc =3D s->pc + diff; target_ulong new_eip =3D new_pc - s->cs_base; =20 + assert(!s->cc_op_dirty); + /* In 64-bit mode, operand size is fixed at 64 bits. */ if (!CODE64(s)) { if (ot =3D=3D MO_16) { @@ -2865,9 +2867,6 @@ static void gen_jmp_rel(DisasContext *s, MemOp ot, in= t diff, int tb_num) } new_eip &=3D mask; =20 - gen_update_cc_op(s); - set_cc_op(s, CC_OP_DYNAMIC); - if (tb_cflags(s->base.tb) & CF_PCREL) { tcg_gen_addi_tl(cpu_eip, cpu_eip, new_pc - s->pc_save); /* @@ -5145,6 +5144,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu) : (int16_t)insn_get(env, s, MO_16)); gen_push_v(s, eip_next_tl(s)); gen_bnd_jmp(s); + gen_update_cc_op(s); gen_jmp_rel(s, dflag, diff, 0); } break; @@ -5168,6 +5168,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu) ? (int32_t)insn_get(env, s, MO_32) : (int16_t)insn_get(env, s, MO_16)); gen_bnd_jmp(s); + gen_update_cc_op(s); gen_jmp_rel(s, dflag, diff, 0); } break; @@ -5188,6 +5189,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu) case 0xeb: /* jmp Jb */ { int diff =3D (int8_t)insn_get(env, s, MO_8); + gen_update_cc_op(s); gen_jmp_rel(s, dflag, diff, 0); } break; --=20 2.45.0