Lexra
Industry | SIP cores |
---|---|
Founded | 1997Waltham, Massachusetts, United States | in
Defunct | 2003 |
Lexra (1997–2003) was a semiconductor intellectual property core company based in Waltham, Massachusetts. Lexra developed and licensed semiconductor intellectual property cores that implemented the MIPS I architecture, except for the four unaligned load and store (lwl, lwr, swl, swr) instructions.[1]
Lexra did not implement those instructions because they are not necessary for good performance in modern software.
Lexra licensed soft cores, unlike
In 1998 Silicon Graphics spun out
In 1999,
Lexra failed as a networking/communications fabless semiconductor chip company and ceased operations in January 2003.
In its 5.5 years, Lexra implemented ten processor designs and licensed nine of them as
- Synthesizable (RTL to gates) MIPS processor core allowing customer-owned tools and customer-chosen foundry
- IP core to support EJTAG on-chip debug
- IP core to support MIPS16 code compression
- RISC processor IP core with a 6-stage pipeline; and later the first with a 7-stage pipeline
- dual-issue superscalarprocessor IP core
- coarse-grained multithreaded processor IP core and, later, the first fine-grained multithreaded processor IP core
Lexra also enhanced the MIPS I architecture with extensions that greatly improved performance for digital signal processing (DSP) algorithms.
References
External links
- Official website at the Wayback Machine (archived November 25, 2002)
- The Lexra Story by former employee Jonah Probell