http://llvm.org/bugs/show_bug.cgi?id=3462
Summary: missing 128bit intrinsic on x86-64
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Keywords: missing-feature
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
the intrinsic "llvm.atomic.cmp.swap.i128.p0i128" is not implemented, although
the architecture is capable of it. The asm-instruction is "cmpxchg16b" and
needs to be handled a litte different than the normal "cmpxchg" instruction for
shorter operands, cause it uses register pairs.
probably, the same is true for the 64bit intrinsic on x86 ("cmpxchg8b")
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