Assembly Optimizations

• Hand coding optimizations

  • Use instructions in parallel

add .L1 A1,A2,A2

|| sub .L2 B1,B2,B1 ; parallel instruction

• Fill NOP delay slots with useful instructions
• Manual loop unrolling
• Pack two 16-bit numbers in a 32-bit register: replace two LDH instructions with LDW instruction

• Assembler optimizations

  • Assigns functional units when not specified
  • Pack and parallelize linear assembly language code
  • Software pipelining

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