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camel-cdr
There have been some RVV & custom matrix extension benchmarks published on github: https://github.com/pigirons/cpufp/blob/master/benchmark_resu...

    $ ./cpufp --thread_pool=[0] # Spacemit X60
    Number Threads: 1
    Thread Pool Binding: 0
    ---------------------------------------------------------------
    | Instruction Set | Core Computation       | Peak Performance |
    | ime             | vmadot(s32,s8,s8)      | 511.53 GOPS      |
    | ime             | vmadotu(u32,u8,u8)     | 511.5 GOPS       |
    | ime             | vmadotus(s32,u8,s8)    | 511.53 GOPS      |
    | ime             | vmadotsu(s32,s8,u8)    | 511.51 GOPS      |
    | ime             | vmadotslide(s32,s8,s8) | 511.51 GOPS      |
    | vector          | vfmacc.vf(f16,f16,f16) | 66.722 GFLOPS    |
    | vector          | vfmacc.vv(f16,f16,f16) | 63.936 GFLOPS    |
    | vector          | vfmacc.vf(f32,f32,f32) | 33.36 GFLOPS     |
    | vector          | vfmacc.vv(f32,f32,f32) | 31.968 GFLOPS    |
    | vector          | vfmacc.vf(f64,f64,f64) | 16.679 GFLOPS    |
    | vector          | vfmacc.vv(f64,f64,f64) | 15.985 GFLOPS    |
    ---------------------------------------------------------------
    $ ./cpufp --thread_pool=[0] # Cortex-A55
    Number Threads: 1
    Thread Pool Binding: 0
    ----------------------------------------------------------------
    | Instruction Set | Core Computation        | Peak Performance |
    | asimd_dp        | dp4a.vs(s32,s8,s8)      | 58.305 GOPS      |
    | asimd_dp        | dp4a.vv(s32,s8,s8)      | 58.311 GOPS      |
    | asimd_dp        | dp4a.vs(u32,u8,u8)      | 58.313 GOPS      |
    | asimd_dp        | dp4a.vv(u32,u8,u8)      | 58.311 GOPS      |
    | asimd_hp        | fmla.vs(fp16,fp16,fp16) | 29.156 GFLOPS    |
    | asimd_hp        | fmla.vv(fp16,fp16,fp16) | 29.156 GFLOPS    |
    | asimd           | fmla.vs(f32,f32,f32)    | 14.579 GFLOPS    |
    | asimd           | fmla.vv(f32,f32,f32)    | 14.577 GFLOPS    |
    | asimd           | fmla.vs(f64,f64,f64)    | 7.2891 GFLOPS    |
    | asimd           | fmla.vv(f64,f64,f64)    | 7.2834 GFLOPS    |
this has a good overview of the core: https://docs.banana-pi.org/en/BPI-F3/SpacemiT_K1