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Jump ALU Path

Jump Instruction Modifications

A jump instruction unconditionally transfers program control to a new location in the program.

The ALU must therefore use the 26-bit immediate address in the instruction to create a new PC address.

This is done by (1) shifting left 2 (to create a proper 28-bit byte address), and (2) adding the upper four PC bits to complete the new 32-bit address.

This new address is then loaded into the program counter as the address of the next instruction to be executed.

 

Fig.3.10 A Jump Instruction Path




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Branch Instructions | Data Buses and ALU Register/Register Functions

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