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[216.71.219.44]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39b08c3a526sm8829849a91.10.2026.09.03.22.51.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 03 Sep 2026 22:51:03 -0700 (PDT) Message-ID: Date: Thu, 3 Sep 2026 22:51:03 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 5/5] tests/tcg/hexagon: check the two HVX predicate build paths agree Content-Language: en-US To: Brian Cain , qemu-devel@nongnu.org References: <20260904012233.3607547-1-brian.cain@oss.qualcomm.com> <20260904012233.3607547-6-brian.cain@oss.qualcomm.com> From: Pierrick Bouvier In-Reply-To: <20260904012233.3607547-6-brian.cain@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA0MDA1MiBTYWx0ZWRfX0qXoz7717eP4 Ry0LoYaGgjeWqPmqFbG84z7f8VgbMR7CdSzh5d8TvLwl3GBlHJ8jzGhM6+JJnX/WUhvq3r1k9BB aM/xQ0Fdt0zjMSLks9U8RUxQdKb71vs= X-Authority-Analysis: v=2.4 cv=eovvCIpX c=1 sm=1 tr=0 ts=6a9a5c49 cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=iLqgmErQAxjCjdq5jj1Aqg==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=9mi-9uxVX9xl3ZHO2CsA:9 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA0MDA1MiBTYWx0ZWRfX3t5PQQIQRAnZ HTBxYUJ8CmTqntw80WcRXvTVH+yhsShYjq4fnpobcz0l7jMXEF4E2+SBfbQQqqMZBBz5YOxyCP6 zKx3aG2abidbU2Zo/r0ANLfeLT2U7qUzvdSmoX/dOKiqxDfrPwhDcM58oD/3oGb4GTK2RtBc+Jc /1ciJAlXGV6BNh8uYApNIJH8+EHVME7e5v9y68RAaRzkSzrNhf90iRu28edYEcFDNupDhhMHTHy 3EpJr/2UmjzhsRJMnrRlDgl1J/VoriwXIbdcMtD9VP6yIO3N3Qzy7tTIDZjoeZPw/L3HCRJ13IL Gd2XfXaDMCdWIWDmmDQq8nxnVSk9drwGim4njphhz4SZ0oiB1OR5B6o/liIsi9I6Y021z3wig4x vXlDYbdAuyWTVQ7MWrvM9vrRwci9mHE/3jP3/0rz11kWlDFLzozT0IviZt0nj5gBpe83hdaH+DZ v4QdfqRDWOkFdGQIy/g== X-Proofpoint-ORIG-GUID: MiU2PLmXT-9SIwpcymWebhuJKCDngTGB X-Proofpoint-GUID: MiU2PLmXT-9SIwpcymWebhuJKCDngTGB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-04_01,2026-09-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 impostorscore=0 spamscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 clxscore=1015 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609040052 Received-SPF: pass client-ip=205.220.168.131; envelope-from=pierrick.bouvier@oss.qualcomm.com; helo=mx0a-0031df01.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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_LOW=-0.7, 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: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 9/3/26 6:22 PM, Brian Cain wrote: > A Q reg can be built by a vector compare or by vand(Vu, Rt), and > those reach the predicate register through independent code paths. Check > that both select the same byte lanes, so a byte-order mistake in either > one is caught. > > The input alternates every eight lanes: a flatter pattern > stays unchanged when predicate bytes are permuted and hides the bug. > > Signed-off-by: Brian Cain > --- > tests/tcg/hexagon/hvx_misc.c | 45 ++++++++++++++++++++++++++++++++++++ > 1 file changed, 45 insertions(+) > Reviewed-by: Pierrick Bouvier