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Figure 5.1 Memory and processing subsystems for MiniMIPS.

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Figure 5.1 Memory and processing subsystems for MiniMIPS. - PowerPoint PPT Presentation


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1. 2. Figure 5.1 Memory and processing subsystems for MiniMIPS. Figure 5.2 Registers and data sizes in MiniMIPS. Figure 5.3 A typical instruction for MiniMIPS and steps in its execution. 5.2 Instruction Format.

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Figure 5.3 A typical instruction for MiniMIPS and steps in its execution.

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5.2 Instruction Format

Figure 5.4 MiniMIPS instructions come in only three formats: register (R), immediate (I), and jump (J).

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5.3 Simple Arithmetic and Logic Instructions

Figure 5.5 The arithmetic instructions add and sub have a format that is common to all two-operand ALU instructions. For these, the fn field specifies the arithmetic/logic operation to be performed.

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What are the machine code for:

andi $t0,$s0,61

ori $t0,$s0,61

xori $t0,$s0,61

Figure 5.6 Instructions such as addi allow us to perform an arithmetic or logic operation for which one operand is a small constant.

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5.4 Load and Store Instructions

Figure 5.7 MiniMIPS lw and sw instructions and their memory addressing convention that allows for simple access to array elements via a base address and an offset (offset = 4i leads us to the ith word).

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Figure 5.8 The lui instruction allows us to load an arbitrary 16-bit value into the upper half of a register while setting its lower half to 0s.

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5.5 Jump and Branch Instructions

Figure 5.9 The jump instruction j of MiniMIPS is a J-type instruction which is shown along with how its effective target address is obtained.The jump register (jr) instruction is R-type, with its specified register often being $ra.

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Figure 5.10 Conditional branch(bltz, beq, bne) and comparison (slt, slti) instructions of MiniMIPS.

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5.6 Addressing Mode –how to obtain operand’s address

Figure 5.11 Schematic representation of addressing modes in MiniMIPS.

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finding maximum from a list
Finding Maximum from a list

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