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Reconfigurable DSP Project

Reconfigurable DSP Project. The ChooChoo: Final Design Review Wody-Instruction Set Architecture School of Electrical and Computer Engineering Georgia Institute of Technology. MPEG II Decoder. Team Members. Walter Huang Omur Kirikci Dae-Ik Kim Ying-Chieh Ko. Problem Statement (1).

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Reconfigurable DSP Project

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  1. Reconfigurable DSP Project The ChooChoo: Final Design Review Wody-Instruction Set Architecture School of Electrical and Computer Engineering Georgia Institute of Technology MPEG II Decoder FDR--ECE6276 Class Project 12/06/00

  2. Team Members • Walter Huang • Omur Kirikci • Dae-Ik Kim • Ying-Chieh Ko FDR--ECE6276 Class Project 12/06/00

  3. Problem Statement (1) • Design of ISA’s for different profiles of a reconfigurable DSP • Three Profiles IDCT, Inverse Qunatization & ZigZag and Motion Coompensation • The design of optimal ISA’s is required for each profile according to the algorithms and the architectures provided. FDR--ECE6276 Class Project 12/06/00

  4. Problem Statement (2) • Support designing and testing of entire process concerning ISA • Cooperation with other groups to support the design and testing of decoder and outlined algorithm for each profile. FDR--ECE6276 Class Project 12/06/00

  5. Requirements ISA design choices • Number of Instructions • Parallelism & Reflection of algorithm • Simplicity and coherency of instruction format between different profiles • Coherence with the proposed architecture FDR--ECE6276 Class Project 12/06/00

  6. Schedule • Regroup Modules into Profiles - 11/3 • Create ISA for Profiles – 11/6 • Create Mission Statement and Mission Plan - 11/10 • Prepare for Preliminary Design Review - 11/15 • Modify ISA for Each Profile - 11/18 • Create Small Test Program in Assembly for Each Profile - 11/19 • Verify Functionality of ISA – 11/22 • Create and Maintain Website - 11/29 • Critical Design Review - 11/29 • Final Design Review – 12/6 • Final Report – 12/6 FDR--ECE6276 Class Project 12/06/00

  7. Task distribution and organization • Walter Huang : All tasks minus website, Group leader • Omur KIRIKCI: All tasks minus testing and website • Daeik Kim : All tasks minus website • Ying-Chieh Ko : All tasks minus testing FDR--ECE6276 Class Project 12/06/00

  8. Outline of ISA’s • Each ISA is 32bit long • 6 bit opcode • 5 bit operands for supporting 31 registers(excluding R0, which is always ‘0’). • Similar to the ISA of DLX or MIPS. • First bit of opcode determines parallel or sequential execution. • Coherence of ISA’s for each profile for fast prototyping of instruction decoders. FDR--ECE6276 Class Project 12/06/00

  9. Advantages of ISA Chosen • Instructions have fixed length for ease of decoding • Supports parallel operations • All ISA’s have much similarity for rapid prototyping FDR--ECE6276 Class Project 12/06/00

  10. Limitations of ISA Chosen • No fancy memory operations • Parallel instruction make compiling more difficult with a modified RISC (DLX) compiler FDR--ECE6276 Class Project 12/06/00

  11. Support role • Make contributions to the testing of decoder design • Provide help for the simple algorithm test • Take role in adopting re-targetable assembler. FDR--ECE6276 Class Project 12/06/00

  12. Tests & results • According to the pseudo codes the Algorithm Group provided, the assembly codes are generated. • The inputs are fed according to the assembly code and the output results turned out to be satisfactory according to the expectations. FDR--ECE6276 Class Project 12/06/00

  13. Lessons learned (1) • Schedule keeping • The ISA – one of the early stages of the entire process, so high risk! • ISA is prepared on time • Technical challenges • Risk due to the possible failures or mistakes in the ISA that might affect the whole design process. • Inefficiency in ISA after the changes introduced according to the requirements. e.g. - Abandoned parallelism in profile 1 & 2 - Register swapping problem in profile 1 & 2 FDR--ECE6276 Class Project 12/06/00

  14. Lessons learned (2) • Cooperation with other teams • Responsibility of working in groups • The Role of Communication in group works • Experience of keeping the tasks done according to the specified deadlines FDR--ECE6276 Class Project 12/06/00

  15. Improvements & Suggestions • Communication channel • Reduce amount of excessive e-mails • Team specific email groups should be used since the beginning of the project FDR--ECE6276 Class Project 12/06/00

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