Zvl64b Extension

Versions

Version 1.0.0

State

ratified

Ratification date

2021-11

Synopsis

The Zvl64b extension requires the implementation to have a vector register length (VLEN) of at least 64 bits.

The Zvl*b extensions are a family of extensions that specify minimum vector register lengths. They allow software to determine the minimum VLEN supported by an implementation without needing to probe at runtime.

With VLEN=64 and the smallest supported SEW of 8 bits, the minimum VLMAX is 8 elements (with LMUL=1).