MIPS patent issues[edit]
The current Loongson instruction set is a MIPS64, but the internal microarchitecture is independently developed by ICT. Early implementations of the family lacked four instructions patented by MIPS Technologies to avoid legal issues.[2][3]
In 2007, a deal was reached by MIPS Technologies and ICT. STMicroelectronics bought a MIPS license for Loongson, and thus the processor can be promoted as MIPS-based or MIPS-compatible instead of MIPS-like.[4][5][6]
In June 2009, ICT licensed the MIPS32 and MIPS64 architectures directly from MIPS Technologies.[7]
In August 2011, Loongson Technology Corp. Ltd. licensed the MIPS32 and MIPS64 architectures from MIPS Technologies, Inc. for continued development of MIPS-based Loongson CPU cores.
MIPS patent issues[edit]The current Loongson instruction set is a MIPS64, but the internal microarchitecture is independently developed by ICT. Early implementations of the family lacked four instructions patented by MIPS Technologies to avoid legal issues.[2][3]In 2007, a deal was reached by MIPS Technologies and ICT. STMicroelectronics bought a MIPS license for Loongson, and thus the processor can be promoted as MIPS-based or MIPS-compatible instead of MIPS-like.[4][5][6]In June 2009, ICT licensed the MIPS32 and MIPS64 architectures directly from MIPS Technologies.[7]In August 2011, Loongson Technology Corp. Ltd. licensed the MIPS32 and MIPS64 architectures from MIPS Technologies, Inc. for continued development of MIPS-based Loongson CPU cores.
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