5.9.8
Special instructions
This section describes the special instructions.
See the RH850 product user's manual and architecture edition for details.
Table 5.41 | Special Instructions |
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ldsr
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Loads to system register
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stsr
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Stores contents of system register
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ldl.w
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Load to start atomic word data manipulation
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stc.w
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Conditional storage when atomic word data manipulation is complete
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cll
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Link for atomic manipulation is canceled
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di
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Disables maskable interrupt
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ei
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Enables maskable interrupt
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eiret
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Returns from EI level exception
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feret
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Returns from FE level exception
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halt
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Stops the processor
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trap
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Software trap
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fetrap
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FE level software exception
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nop
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No operation
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switch
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Table reference branch
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callt
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Table reference call
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ctret
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Returns from callt
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caxi
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Comparison and swap
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rie
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Reserved instruction exception
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syncm
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Memory synchronize instruction
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syncp
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Pipeline synchronize instruction
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synce
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Exception synchronization instruction
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synci
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Instruction pipeline synchronization instruction
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prepare
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Generates stack frame (preprocessing of function)
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dispose
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Deletes stack frame (post processing of function)
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syscall
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System call exception
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pushsp
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Push from the stack
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popsp
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Pop from the stack
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snooze
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Snooze
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