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[189.204.159.168]) by smtp.gmail.com with ESMTPSA id c189-20020acab3c6000000b002ef8a16e8bfsm2837564oif.43.2022.03.25.07.48.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 25 Mar 2022 07:48:47 -0700 (PDT) Message-ID: <5a811414-b183-d34b-3094-ea7b3cfb4c68@linaro.org> Date: Fri, 25 Mar 2022 08:48:37 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH] target/i386: tcg: high bits SSE cmp operation must be ignored Content-Language: en-US To: Paolo Bonzini , qemu-devel@nongnu.org References: <20220324080847.69459-1-pbonzini@redhat.com> From: Richard Henderson In-Reply-To: <20220324080847.69459-1-pbonzini@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::229 (failed) Received-SPF: pass client-ip=2607:f8b0:4864:20::229; envelope-from=richard.henderson@linaro.org; helo=mail-oi1-x229.google.com X-Spam_score_int: -6 X-Spam_score: -0.7 X-Spam_bar: / X-Spam_report: (-0.7 / 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, NICE_REPLY_A=-0.001, PDS_HP_HELO_NORDNS=0.659, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: , Cc: sonicadvance1@gmail.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 3/24/22 02:08, Paolo Bonzini wrote: > High bits in the immediate operand of SSE comparisons are ignored, they > do not result in an undefined opcode exception. This is mentioned > explicitly in the Intel documentation. > > Reported-by:sonicadvance1@gmail.com > Closes:https://gitlab.com/qemu-project/qemu/-/issues/184 > Signed-off-by: Paolo Bonzini > --- > target/i386/tcg/translate.c | 6 ++---- > 1 file changed, 2 insertions(+), 4 deletions(-) Reviewed-by: Richard Henderson r~