[llvm-bugs] [Bug 48283] New: Missing _InterlockedCompareExchange128 intrinsic functions for ARM64

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Nov 24 07:23:15 PST 2020


https://bugs.llvm.org/show_bug.cgi?id=48283

            Bug ID: 48283
           Summary: Missing _InterlockedCompareExchange128 intrinsic
                    functions for ARM64
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: zufuliu at 163.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

split from https://bugs.llvm.org/show_bug.cgi?id=47099

See
https://docs.microsoft.com/en-us/cpp/intrinsics/interlockedcompareexchange128?view=msvc-160

_InterlockedCompareExchange128, _InterlockedCompareExchange128_acq,
_InterlockedCompareExchange128_nf and _InterlockedCompareExchange128_rel are
missing from intrin.h for ARM64.

_InterlockedCompareExchange128_nf is used by Microsoft STL <atomic> header for
ARM64, see https://github.com/microsoft/STL/blob/master/stl/inc/atomic#L483 and
https://github.com/microsoft/STL/issues/1491.

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