Public bug reported:
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 use
Here's also a basic test that can be run on hardware and have rflags and
rsp inspected after each instruction just to see how hardware doesn't
effect it.
** Attachment added: "a.cpp"
https://bugs.launchpad.net/qemu/+bug/1828867/+attachment/5263495/+files/a.cpp
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You received this bug notific
Public bug reported:
When translating code that is using LAHF and SAHF in combination with the REX
prefix then qemu translates incorrectly.
These two instructions only ever use the AH register. Contrary to other
instructions where if you use REX + high bit offsets then it'll pull in rsp and
a f
