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9.35.3.3 Constants

Several Sparc instructions take an immediate operand field for which mnemonic names exist. Two such examples are `membar' and `prefetch'. Another example are the set of V9 memory access instruction that allow specification of an address space identifier.

The `membar' instruction specifies a memory barrier that is the defined by the operand which is a bitmask. The supported mask mnemonics are:

These values can be ored together, for example:

     membar #Sync
     membar #StoreLoad | #LoadLoad
     membar #StoreLoad | #StoreStore

The prefetch and prefetcha instructions take a prefetch function code. The following prefetch function code constant mnemonics are available: