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The CMPXCHG instruction has the following operands: - AX (implicit, CompareValue): input and output - destination operand (*Value): input and output - source operand (ExchangeValue): input The IA32 version of InternalSyncCompareExchange16() correctly marks CompareValue as input/output, but it marks (*Value) only as input. The X64 version of InternalSyncCompareExchange16() attempts to mark both CompareValue and (*Value) as input/output, but it doesn't use the appropriate constraints for either operand. Fix these issues. Furthermore, prefer the short "+" constraint for I/O operands over the <output-operand-number> constraint that can be applied to the input instances of I/O operands. Cc: Liming Gao <liming.gao@intel.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1208 Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Acked-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
EDK II Project
A modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications from www.uefi.org.
Contributions to the EDK II open source project are covered by the TianoCore Contribution Agreement 1.1
The majority of the content in the EDK II open source project uses a BSD 2-Clause License. The EDK II open source project contains the following components that are covered by additional licenses:
- AppPkg/Applications/Python/Python-2.7.2/Tools/pybench
- AppPkg/Applications/Python/Python-2.7.2
- AppPkg/Applications/Python/Python-2.7.10
- BaseTools/Source/C/BrotliCompress
- MdeModulePkg/Library/BrotliCustomDecompressLib
- OvmfPkg
- CryptoPkg/Library/OpensslLib/openssl
The EDK II Project is composed of packages. The maintainers for each package are listed in Maintainers.txt.