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: