Topic 5 - IO, Addressing Modes

Topic 5 - IO, Addressing Modes - Computer Architecture I/O...

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Computer  Architecture I/O &  Addressing  Modes Reading:  Sections 2.9- 2.10
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A Glance at the Schedule What’s coming in… What’s going out…
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Outline  Addressing modes Jump and branch instructions
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“If you're not failing every now and again, it's a  sign you're not doing anything very innovative.” W. Allen
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Addressing Modes
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Immediate addressing Operand is a  constant within the  instruction itself Example: ori addi subi
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Register addressing Operand is a register Example: jr CAT #1
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Base or displacement  addressing Operand is at the  memory location  whose address is the  sum of a register and  a constant in the  instruction Example: lw sw CAT #2
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PC-relative addressing Branch address is  the sum of the PC  and a constant in the  instruction Example: beq bne CAT #3
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Pseudo-direct addressing Jump address is 
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