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[109.252.80.113]) by smtp.gmail.com with ESMTPSA id n4sm565963lfe.246.2020.10.06.04.36.12 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Oct 2020 04:36:13 -0700 (PDT) From: To: Subject: pstate_read/write ignores nRW field that is kept in env->aarch64 Date: Tue, 6 Oct 2020 14:36:11 +0300 Message-ID: <01e701d69bd4$e49413d0$adbc3b70$@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 16.0 Thread-Index: Adab0i4+z1y77tz2RkS16Fcx3zipfg== Content-Language: en-us Received-SPF: pass client-ip=2a00:1450:4864:20::236; envelope-from=ivan.i.kulagin@gmail.com; helo=mail-lj1-x236.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. 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, FREEMAIL_FROM=0.001, 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-Mailman-Approved-At: Tue, 06 Oct 2020 10:10:22 -0400 X-BeenThere: qemu-arm@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 Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-arm" X-TUID: EA+c17Z5xIjB Hello! Could you please explain me why in pstate_read and pstate_write the nRW bit is ignored? The comment in CPUState says that nRW (also known as M[4]) is kept, inverted, in env->aarch64, but the value returned by pstate_read doesn't contain this bit. static inline uint32_t pstate_read(CPUARMState *env) { int ZF; ZF = (env->ZF == 0); return (env->NF & 0x80000000) | (ZF << 30) | (env->CF << 29) | ((env->VF & 0x80000000) >> 3) | env->pstate | env->daif | (env->btype << 10); } Best regards, Ivan.