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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 19:39:53 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 19:39:53 +0200 |
| commit | dee4dcba78baf712cab403d47d9db319ab7f95d6 (patch) | |
| tree | 418478faf06786701a56268672f73d6b0b4eb239 /results/classifier/semantic-bugs/instruction/1245543 | |
| parent | 4d9e26c0333abd39bdbd039dcdb30ed429c475ba (diff) | |
| download | qemu-analysis-dee4dcba78baf712cab403d47d9db319ab7f95d6.tar.gz qemu-analysis-dee4dcba78baf712cab403d47d9db319ab7f95d6.zip | |
restructure results
Diffstat (limited to 'results/classifier/semantic-bugs/instruction/1245543')
| -rw-r--r-- | results/classifier/semantic-bugs/instruction/1245543 | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/results/classifier/semantic-bugs/instruction/1245543 b/results/classifier/semantic-bugs/instruction/1245543 deleted file mode 100644 index 99966ab81..000000000 --- a/results/classifier/semantic-bugs/instruction/1245543 +++ /dev/null @@ -1,43 +0,0 @@ -instruction: 0.966 -other: 0.798 -device: 0.770 -semantic: 0.629 -socket: 0.619 -network: 0.548 -vnc: 0.529 -graphic: 0.455 -boot: 0.437 -mistranslation: 0.417 -assembly: 0.269 -KVM: 0.262 - -Wrong implementation of SSE4.1 pmovzxbw and similar instructions - -QEMU 1.5.0 (and git version, as far as I can tell from the source code) has incorrect implementation of pmovzxbw and similar SSE4.1 instructions. The instruction zero-extends the first 8 8-bit elements of a vector to 16bit vector and puts them to another vector. The current implementation applies this operation only to the first element and zeros out the rest. - -To verify, compile the attached program for SSE4.1 (g++ -msse4.1 cvtint.cc). On real hardware, it produces the following output: - -$ ./a.out -1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 - -On QEMU, the output is as follows: - -$ ./a.out -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - -QEMU is invoked as: - -qemu-system-x86_64 \ - -M pc -cpu Haswell,+sse4.1,+avx,+avx2,+fma,enforce -m 512 \ - -serial stdio -no-reboot \ - -kernel vmlinuz -initrd initrd.img \ - -netdev user,id=user.0 -device rtl8139,netdev=user.0 -redir tcp:2222::22 \ - -hda ubuntu-amd64.ext3 \ - --append "rw console=tty root=/dev/sda" - - - -Looking through old bug tickets... is this still an issue with the latest version of QEMU? Or could we close this ticket nowadays? - -[Expired for QEMU because there has been no activity for 60 days.] - |