Delay Slot Instructions

Branch Delay Slot Instruction

• • Field Summary

    Fields

    Modifier and Type	Field	Description
    static int	INVALID_DEPTH_CHANGE

    • Fields inherited from interface ghidra.program.model.listing.CodeUnit

      COMMENT_PROPERTY, DEFINED_DATA_PROPERTY, EOL_COMMENT, INSTRUCTION_PROPERTY, MNEMONIC, NO_COMMENT, PLATE_COMMENT, POST_COMMENT, PRE_COMMENT, REPEATABLE_COMMENT, SPACE_PROPERTY

  • Method Summary

    All MethodsInstance MethodsAbstract Methods

    Modifier and Type	Method	Description
    void	clearFallThroughOverride()	Restores this instruction's fallthrough address back to the default fallthrough for this instruction.
    Address	getDefaultFallThrough()
    int	getDefaultFallThroughOffset()	Get default fall-through offset in bytes from start of instruction to the fallthrough instruction.
    Address[]	getDefaultFlows()	Get an array of Address objects for all default flows established by the underlying instruction prototype.
    java.lang.String	getDefaultOperandRepresentation​(int opIndex)	Get the operand representation for the given operand index without markup.
    java.util.List<java.lang.Object>	getDefaultOperandRepresentationList​(int opIndex)	Get the operand representation for the given operand index.
    int	getDelaySlotDepth()	Get the number of delay slot instructions for this argument.
    Address	getFallFrom()	Get the Address for the instruction that fell through to this instruction.
    Address	getFallThrough()	Get the fallthrough for this instruction, factoring in any fallthrough override and delay slotted instructions.
    FlowOverride	getFlowOverride()	Returns the flow override which may have been set on this instruction.
    Address[]	getFlows()	Get an array of Address objects for all flows other than a fall-through.
    FlowType	getFlowType()	Get the flow type of this instruction (how this instruction flows to the next instruction).
    java.lang.Object[]	getInputObjects()
    InstructionContext	getInstructionContext()
    Instruction	getNext()	Get the instruction following this one in address order.
    RefType	getOperandRefType​(int index)	Get the operand reference type for the given operand index.
    int	getOperandType​(int opIndex)
    java.lang.Object[]	getOpObjects​(int opIndex)	Get objects used by this operand (Address, Scalar, Register ...)
    PcodeOp[]	getPcode()	Get an array of PCode operations (micro code) that this instruction performs.
    PcodeOp[]	getPcode​(boolean includeOverrides)	Get an array of PCode operations (micro code) that this instruction performs.
    PcodeOp[]	getPcode​(int opIndex)	Get an array of PCode operations (micro code) that a particular operand performs to compute its value.
    Instruction	getPrevious()	Get the instruction before this one in address order.
    InstructionPrototype	getPrototype()
    Register	getRegister​(int opIndex)	If operand is a pure Register, return the register.
    java.lang.Object[]	getResultObjects()	Get the Result objects produced/affected by this instruction These would probably only be Register or Address
    java.lang.String	getSeparator​(int opIndex)
    boolean	hasFallthrough()	Returns true if this instruction has a fall-through flow.
    boolean	isFallthrough()	Returns true if this instruction has no execution flow other than fall-through.
    boolean	isFallThroughOverridden()	Returns true if this instructions fallthrough has been overriden.
    boolean	isInDelaySlot()	Return true if this instruction was disassembled in a delay slot
    void	setFallThrough​(Address addr)	Overrides the instruction's default fallthrough address to the given address.
    void	setFlowOverride​(FlowOverride flowOverride)

    • Methods inherited from interface ghidra.program.model.listing.CodeUnit

      addMnemonicReference, addOperandReference, compareTo, contains, getAddress, getAddressString, getBytes, getBytesInCodeUnit, getComment, getCommentAsArray, getExternalReference, getIntProperty, getLabel, getLength, getMaxAddress, getMinAddress, getMnemonicReferences, getMnemonicString, getNumOperands, getObjectProperty, getOperandReferences, getPrimaryReference, getPrimarySymbol, getProgram, getReferenceIteratorTo, getReferencesFrom, getScalar, getStringProperty, getSymbols, getVoidProperty, hasProperty, isSuccessor, propertyNames, removeExternalReference, removeMnemonicReference, removeOperandReference, removeProperty, setComment, setCommentAsArray, setPrimaryMemoryReference, setProperty, setProperty, setProperty, setProperty, setRegisterReference, setStackReference, visitProperty

    • Methods inherited from interface ghidra.program.model.mem.MemBuffer

      getAddress, getBigInteger, getByte, getBytes, getInt, getLong, getMemory, getShort, getUnsignedByte, getUnsignedInt, getUnsignedShort, getVarLengthInt, getVarLengthUnsignedInt, isBigEndian, isInitializedMemory

    • Methods inherited from interface ghidra.program.model.lang.ProcessorContext

      clearRegister, setRegisterValue, setValue

    • Methods inherited from interface ghidra.program.model.lang.ProcessorContextView

      getBaseContextRegister, getRegister, getRegisters, getRegisterValue, getValue, hasValue

• Information and translations of delay slot in the most comprehensive dictionary definitions resource on the web. A delay slot is an instruction slot that gets.
• In computer architecture, a delay slot is an instruction slot being executed without the effects of a preceding instruction. The most common form is a single arbitrary instruction located immediately after a branch instruction on a RISC or DSP architecture; this instruction will execute even if the preceding branch is taken.
• On the MIPS architecture, jump and branch instructions have a 'delay slot'. This means that the instruction after the jump or branch instruction is executed before the jump or branch is executed.

Delay slot instruction Home › Forums › MIPS Insider › Delay slot instruction This topic contains 1 reply, has 2 voices, and was last updated by ChrisImgtec 3 years, 4 months ago. In the branch delay slot, we edit the return address so that when function1 returns, it resumes execution at resume rather than nominalreturn, thereby avoiding having to execute another branch instruction.