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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4432 There is a return value bug: The sc.w/sc.d instruction will destroy the reg_t0, use reg_t1 to avoid context reg_t0 being corrupted. Adjust Check that ptr align is UINT16. Optimize function SyncIncrement and SyncDecrement. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Cc: Chao Li <lichao@loongson.cn> Signed-off-by: Dongyan Qian <qiandongyan@loongson.cn> Reviewed-by: Chao Li <lichao@loongson.cn>