RISC-V Summit: Customizable Vector Unit


The vector block consists of several vector cores that perform several parallel calculations.

In this case, Semidynamics' vector kernel can be adapted to support FP64, FP32, FP16, BF16, INT64, INT32, INT16 or INT8 data types depending on the requirements - the longest implemented length word defines the width of the vector kernel ('ELEN').

Its vector units can have 4, 8, 16 or 32 cores and the total data path width of the vector units ('DLEN' = ELEN x number of cores) can be from 128 to 2048 bits.

A cross-vector network is available in the vector block to connect up to 32 vector cores. "The cross-vector core block is used for special instructions in the RISC-V standard that shuffle data between different vector cores, such as vrgather and vslide," according to semidynamics.

In vector units, the number of bits of each vector register (VLEN) can be adjusted beyond '1x' (VLEN=DLEN) to 2x, 4x or 8x. "When VLEN is greater than DLEN, the vector operation takes multiple cycles to perform," the company said. “For example, when VLEN=2048 and DLEN=512, each vector arithmetic operation will take 4 cycles. This is a great feature that allows you to withstand high memory latencies and reduce power consumption.”

“Together, our technologies take RISC-V to the next level with the fastest big data processing. is currently available that will open up opportunities in high-performance computing applications such as video processing, AI and machine learning,” said Semidynamics CEO and Founder Roger Espasa.

The vector unit failed, and paired with Semidynamics' faulty Atrevido 64bit RISC-V core. The cores are still under development, and the company can provide custom interfaces and protocols to match customers' intellectual property.

Founded in 2016, Semidynamics is located in Barcelona, Spain, and offers a customizable RISC-V processor. IP specializing in high-performance cores with vector blocks for machine learning and AI. It is privately owned and a member of the RISC-V Alliance.

The European RISC-V Summit will be held in Barcelona from June 5 to 9, 2023. Find Semidynamics at stand 6.

Source: electronicsweekly.com


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