On Mon, Aug 24, 2026 at 10:09:42PM +0200, Aurelien Jarno wrote: > Source: highway > Version: 1.3.0-5.1 > Severity: important > X-Debbugs-Cc: [email protected] > User: [email protected] > Usertags: riscv64 >... > At this stage I haven't been able to fully fix the issue except by fully > disabling RVV support. Nevertheless I would like to share my initial > debugging attempts: > > - Disabling "gcc-15.patch" fixes the issue. > > - Building with -DHWY_CMAKE_RVV:BOOL=ON, instead on relying on runtime > detection fixes 4 of the issues, but adds an extra one: > | 126 - HwyBlockwiseTestGroup/HwyBlockwiseTest.TestAllZipLower/EMU128 > (Failed) > | 696 - DotTestGroup/DotTest.TestAllDotF32BF16/RVV (Failed) > > - With the current upstream HEAD with -DHWY_CMAKE_RVV:BOOL=OFF (so with > runtime > detection), I get: > | 365 - > HwyInterleavedTestGroup/HwyInterleavedTest.TestAllLoadStoreInterleaved2/RVV > (Failed) > | 367 - > HwyInterleavedTestGroup/HwyInterleavedTest.TestAllLoadStoreInterleaved3/RVV > (Failed) > | 369 - > HwyInterleavedTestGroup/HwyInterleavedTest.TestAllLoadStoreInterleaved4/RVV > (Failed) > | 697 - TupleTestGroup/TupleTest.TestAllCreate/RVV (Failed) > | 750 - MinMaxTestGroup/MinMaxTest.TestAllIndexOfExtremeInLongSpan/RVV > (Failed) > | 774 - DotTestGroup/DotTest.TestAllDotF32BF16/RVV (Failed) > | 831 - IntDivTestGroup/IntDivTest.TestAllFloorDivision/RVV (Failed) > > - With the current upstream HEAD with -DHWY_CMAKE_RVV:BOOL=ON, I get: > | 750 - MinMaxTestGroup/MinMaxTest.TestAllIndexOfExtremeInLongSpan/RVV > (Failed) > | 774 - DotTestGroup/DotTest.TestAllDotF32BF16/RVV (Failed) > | 831 - IntDivTestGroup/IntDivTest.TestAllFloorDivision/RVV (Failed) > > I have been able to reproduce the issue on a SpacemiT K1 CPU (like the > buildds), a SpacemiT K3 CPU and using QEMU, so I think we can rule out a > CPU bug.
For undocumented reasons, the main maintainer of this package (Mathieu) disabled unaligned access in experimental. Does building with DEB_CXXFLAGS_MAINT_APPEND += -mstrict-align make a difference? > Regards > Aurelien cu Adrian
