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Code Size Efficiency - Coggle Diagram
Code Size Efficiency
Compiler Optimization
Balances speed and size
Inlining and unrolling adjusted for power
Reuses registers and loops efficiently
Impacts instruction cache efficiency
Removes redundant operations
CISC Machines
Reduce overall program length
Save fetch energy vs RISC
Encode more work per instruction
Require optimized decoding hardware
Complex Instruction Set Computers
Compression Techniques
Decompression done at runtime
Minimizes memory bandwidth needs
Example: dictionary or Huffman encoding
Reduce instruction and data storage
Achieves energy savings via smaller transfers
Trade-off Analysis
Compression adds decode energy cost
CISC vs RISC efficiency balance
Smaller code vs execution speed
Must match hardware constraints
Embedded Memory
Smaller code reduces memory access power
Less fetching = lower energy use
Memory is limited in embedded systems
Memory hierarchies impact efficiency