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CLREX

Clear-Exclusive clears the local monitor of the executing PE.

It has encodings from the following instruction sets: A32 ( A1 ) and T32 ( T1 ) .

A1

313029282726252423222120191817161514131211109876543210
111101010111(1)(1)(1)(1)(1)(1)(1)(1)(0)(0)(0)(0)0001(1)(1)(1)(1)

A1

CLREX{<c>}{<q>}

// No additional decoding required

T1

15141312111098765432101514131211109876543210
111100111011(1)(1)(1)(1)10(0)0(1)(1)(1)(1)0010(1)(1)(1)(1)

T1

CLREX{<c>}{<q>}

// No additional decoding required

For more information about the constrained unpredictable behavior, see Architectural Constraints on UNPREDICTABLE behaviors.

Assembler Symbols

<c>

For encoding A1: see Standard assembler syntax fields. Must be AL or omitted.

For encoding T1: see Standard assembler syntax fields.

<q>

See Standard assembler syntax fields.

Operation

if ConditionPassed() then
    EncodingSpecificOperations();
    ClearExclusiveLocal(ProcessorID());
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