Xtensa ISA Public Manual

The Xtensa Instruction Set Architecture (ISA) is a RISC ISA targeted at embedded, communication, and consumer products. The ISA is designed to provide:

• A high degree of extensibility
• Industry-leading code density
• Optimized low-power implementation
• High performance
• Low-cost implementation


This manual describes the Xtensa ISA—both the core architecture and the architectural options.


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