https://bugs.llvm.org/show_bug.cgi?id=32804
Bug ID: 32804
Summary: Instruction with incorrect VEX prefix W value decoded
as valid
Product: libraries
Version: 3.9
Hardware: Other
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: MC
Assignee: unassignedb...@nondot.org
Reporter: nholc...@wisc.edu
CC: llvm-bugs@lists.llvm.org
The following instruction should be incorrect because 3rd byte is incorrect for
this instruction to be valid. The third byte must have a leading zero (for the
W bit of vex).
Bytes: 8f 08 f0 86 25 24 bf 73 eb ba
LLVM Output: vpmacsswd %xmm11, -344735964(%rip), %xmm1, %xmm12
Expected: decoder should return error
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