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readme : update ROCm Windows instructions (#4122)

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* Update README.md

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Co-authored-by: Jared Van Bortel <cebtenzzre@gmail.com>

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Co-authored-by: Jared Van Bortel <cebtenzzre@gmail.com>
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Aaryaman Vasishta 2023-11-21 00:02:46 +09:00 committed by GitHub
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@ -410,19 +410,27 @@ Building the program with BLAS support may lead to some performance improvements
This provides BLAS acceleration on HIP-supported AMD GPUs. This provides BLAS acceleration on HIP-supported AMD GPUs.
Make sure to have ROCm installed. Make sure to have ROCm installed.
You can download it from your Linux distro's package manager or from here: [ROCm Quick Start (Linux)](https://rocm.docs.amd.com/en/latest/deploy/linux/quick_start.html). You can download it from your Linux distro's package manager or from here: [ROCm Quick Start (Linux)](https://rocm.docs.amd.com/en/latest/deploy/linux/quick_start.html).
Windows support is coming soon...
- Using `make`: - Using `make`:
```bash ```bash
make LLAMA_HIPBLAS=1 make LLAMA_HIPBLAS=1
``` ```
- Using `CMake`: - Using `CMake` for Linux:
```bash ```bash
mkdir build mkdir build
cd build cd build
CC=/opt/rocm/llvm/bin/clang CXX=/opt/rocm/llvm/bin/clang++ cmake .. -DLLAMA_HIPBLAS=ON CC=/opt/rocm/llvm/bin/clang CXX=/opt/rocm/llvm/bin/clang++ cmake .. -DLLAMA_HIPBLAS=ON
cmake --build . cmake --build .
``` ```
- Using `CMake` for Windows:
```bash
mkdir build
cd build
cmake -G Ninja -DAMDGPU_TARGETS=gfx1100 -DLLAMA_HIPBLAS=ON -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ ..
cmake --build .
```
Make sure that `AMDGPU_TARGETS` is set to the GPU arch you want to compile for. The above example uses `gfx1100` that corresponds to Radeon RX 7900XTX/XT/GRE. You can find a list of targets [here](https://llvm.org/docs/AMDGPUUsage.html#processors)
The environment variable [`HIP_VISIBLE_DEVICES`](https://rocm.docs.amd.com/en/latest/understand/gpu_isolation.html#hip-visible-devices) can be used to specify which GPU(s) will be used. The environment variable [`HIP_VISIBLE_DEVICES`](https://rocm.docs.amd.com/en/latest/understand/gpu_isolation.html#hip-visible-devices) can be used to specify which GPU(s) will be used.
If your GPU is not officially supported you can use the environment variable [`HSA_OVERRIDE_GFX_VERSION`] set to a similar GPU, for example 10.3.0 on RDNA2 or 11.0.0 on RDNA3. If your GPU is not officially supported you can use the environment variable [`HSA_OVERRIDE_GFX_VERSION`] set to a similar GPU, for example 10.3.0 on RDNA2 or 11.0.0 on RDNA3.