VCC Performance Modeling for Xtensa Processor

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VCC Performance Modeling for Xtensa Processor

• Vandana Prabhu

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Strategy
C code
VCC white_c
Manual
Add Test code
Fernandos script
Cycle count
Xtensa ISS
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Results

• Transport and UI blocks converted
• Test code adds overhead to cycle count
• Only limited fuzzy instructions are used for
  cycle count
• LD, LI, ST, IF, GOTO, OPi, SUB, RET
• Accuracy remains to be verified
• ARM comparison is not clear