https://github.com/jiegec/rvv-kernels

Implements kernels with RISC-V Vector
https://github.com/jiegec/rvv-kernels

riscv rvv vector

Last synced: about 1 month ago
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Implements kernels with RISC-V Vector

• Host: GitHub
• URL: https://github.com/jiegec/rvv-kernels
• Owner: jiegec
• Created: 2022-02-16T07:45:19.000Z (almost 3 years ago)
• Default Branch: master
• Last Pushed: 2023-03-24T16:15:51.000Z (over 1 year ago)
• Last Synced: 2024-10-26T22:49:42.925Z (about 2 months ago)
• Topics: riscv, rvv, vector
• Language: Assembly
• Homepage:
• Size: 92.8 KB
• Stars: 21
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# rvv-kernels

Implements kernels with RISC-V Vector. Requires LLVM 14.

Kernels included:

- asum

- axpy

- dot

- nrm2

- gemm

- spmv

- stencil

Generated assemblies are also provided in this repo for reference.

## How to build

You need:

1. Clang+LLVM 14

2. RISC-V GNU Toolchain

To build with system clang++-14:

```shell

make GCC_TOOLCHAIN_DIR=/path/to/gnu-toolchain CXX=/usr/bin/clang++-14 -j8

```

To build with upstream clang:

```shell

make GCC_TOOLCHAIN_DIR=/path/to/gnu-toolchain LLVM=/path/to/llvm -j8

```

## How to run in spike

To run vectorized kernel in spike:

```shell

make GCC_TOOLCHAIN_DIR=/path/to/gnu-toolchain CXX=/usr/bin/clang++-14 PK=/path/to/spike/bin/pk spike-xxx

```

Some examples:

```shell

$ make spike-axpy

axpy disable vectorize: 8.02 us 0.25 gflops

axpy compiler vectorize: 3.53 us 0.57 gflops

axpy rvv: 6.02 us 0.33 gflops

axpy rvv2: 6.04 us 0.33 gflops

$ make spike-spmv

spmv disable vectorize: 118.03 us 0.17 gflops

spmv compiler vectorize: 85.05 us 0.24 gflops

spmv rvv: 88.02 us 0.23 gflops

spmv rvv2: 97.03 us 0.21 gflops

```