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Diffstat (limited to 'mailinglist/output_launchpad/1832422')
| -rw-r--r-- | mailinglist/output_launchpad/1832422 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/mailinglist/output_launchpad/1832422 b/mailinglist/output_launchpad/1832422 new file mode 100644 index 00000000..98e2865a --- /dev/null +++ b/mailinglist/output_launchpad/1832422 @@ -0,0 +1,20 @@ +SSE CMP ops with 8bit immediate throw sigill with oversized byte + +The SSE comparison ops that use an 8bit immediate as a comparison type selector throws a sigill when the immediate is oversized. + +Test op that I found this on is here `66 0f c2 c0 d1 cmppd xmm0,xmm0,0xd1` +According to the x86-64 documentation only bits [2:0] are used for these ops (and [4:0] for the AVX variant) +Currently qemu just checks if the value is >=8 and will throw a sigill in that case. It instead needs to mask. + +I have a small patch that fixes the issue for the SSE variant. + + + + +This is an automated cleanup. This bug report has been moved to QEMU's +new bug tracker on gitlab.com and thus gets marked as 'expired' now. +Please continue with the discussion here: + + https://gitlab.com/qemu-project/qemu/-/issues/184 + + |