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NEW YORK 4. (30%) We will be implementing a new instruction within the MIPS architecture. New instruction will decrement a Variable stored in a memory location and store the decremented value in a register (Rt). TH new instruction will be called DECR. Its usage and interpretation is Usage: DECR Offset(4*Rs),Rt RogPtl= MemI4*Rs+Offsetl - 1

NEW YORK 4. (30%) We will be implementing a new instruction within the MIPS architecture. New instruction will decrement a Variable stored in a memory location and store the decremented value in a register (Rt). TH new instruction will be called DECR. Its usage and interpretation is Usage: DECR Offset(4*Rs),Rt RogPtl= MemI4*Rs+Offsetl - 1

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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--- **Implementing a New Instruction in MIPS Architecture** **Context:** We will be introducing a new instruction in the MIPS architecture. This instruction, called **DECR**, will decrement a variable stored in a memory location and store the decremented value in a register \( Rt \). **Usage:** \[ \text{DECR Offset(4*Rs), Rt} \] **Interpretation:** \[ \text{Reg[Rt] = Mem[4*Rs + Offset] - 1} \] **Discussion Points:** 1. **Blocks and Control Signals:** - Analyze which blocks are utilized in this new instruction. - Determine the control signals that are generated. 2. **Instruction Code Fields:** - Consider the format of instruction code fields for this operation. 3. **Hardware Logic:** - Evaluate if additional hardware logic is necessary. Provide an explanation based on the data path flow. (You may illustrate with a simplified data path flow diagram.) ---
Transcribed Image Text:--- **Implementing a New Instruction in MIPS Architecture** **Context:** We will be introducing a new instruction in the MIPS architecture. This instruction, called **DECR**, will decrement a variable stored in a memory location and store the decremented value in a register \( Rt \). **Usage:** \[ \text{DECR Offset(4*Rs), Rt} \] **Interpretation:** \[ \text{Reg[Rt] = Mem[4*Rs + Offset] - 1} \] **Discussion Points:** 1. **Blocks and Control Signals:** - Analyze which blocks are utilized in this new instruction. - Determine the control signals that are generated. 2. **Instruction Code Fields:** - Consider the format of instruction code fields for this operation. 3. **Hardware Logic:** - Evaluate if additional hardware logic is necessary. Provide an explanation based on the data path flow. (You may illustrate with a simplified data path flow diagram.) ---
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