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> [!IMPORTANT]
> This build documentation is specific only to RISC-V SpacemiT SOCs.
## Build llama.cpp locally (for riscv64)
1. Prepare Toolchain For RISCV
~~~
wget https://archive.spacemit.com/toolchain/spacemit-toolchain-linux-glibc-x86_64-v1.1.2.tar.xz
~~~
2. Build
Below is the build script: it requires utilizing RISC-V vector instructions for acceleration. Ensure the `GGML_CPU_RISCV64_SPACEMIT` compilation option is enabled. The currently supported optimization version is `RISCV64_SPACEMIT_IME1`, corresponding to the `RISCV64_SPACEMIT_IME_SPEC` compilation option. Compiler configurations are defined in the `riscv64-spacemit-linux-gnu-gcc.cmake` file. Please ensure you have installed the RISC-V compiler and set the environment variable via `export RISCV_ROOT_PATH={your_compiler_path}`.
```bash
cmake -B build \
-DCMAKE_BUILD_TYPE=Release \
-DGGML_CPU_RISCV64_SPACEMIT=ON \
-DLLAMA_CURL=OFF \
-DGGML_RVV=ON \
-DGGML_RV_ZFH=ON \
-DGGML_RV_ZICBOP=ON \
-DRISCV64_SPACEMIT_IME_SPEC=RISCV64_SPACEMIT_IME1 \
-DCMAKE_TOOLCHAIN_FILE=${PWD}/cmake/riscv64-spacemit-linux-gnu-gcc.cmake \
-DCMAKE_INSTALL_PREFIX=build/installed
cmake --build build --parallel $(nproc) --config Release
pushd build
make install
popd
```
## Simulation
You can use QEMU to perform emulation on non-RISC-V architectures.
1. Download QEMU
~~~
wget https://archive.spacemit.com/spacemit-ai/qemu/jdsk-qemu-v0.0.14.tar.gz
~~~
2. Run Simulation
After build your llama.cpp, you can run the executable file via QEMU for simulation, for example:
~~~
export QEMU_ROOT_PATH={your QEMU file path}
export RISCV_ROOT_PATH_IME1={your RISC-V compiler path}
${QEMU_ROOT_PATH}/bin/qemu-riscv64 -L ${RISCV_ROOT_PATH_IME1}/sysroot -cpu max,vlen=256,elen=64,vext_spec=v1.0 ${PWD}/build/bin/llama-cli -m ${PWD}/models/Qwen2.5-0.5B-Instruct-Q4_0.gguf -t 1
~~~
## Performance
#### Quantization Support For Matrix
~~~
model name : Spacemit(R) X60
isa : rv64imafdcv_zicbom_zicboz_zicntr_zicond_zicsr_zifencei_zihintpause_zihpm_zfh_zfhmin_zca_zcd_zba_zbb_zbc_zbs_zkt_zve32f_zve32x_zve64d_zve64f_zve64x_zvfh_zvfhmin_zvkt_sscofpmf_sstc_svinval_svnapot_svpbmt
mmu : sv39
uarch : spacemit,x60
mvendorid : 0x710
marchid : 0x8000000058000001
~~~
Q4_0
| Model | Size | Params | backend | threads | test | t/s |
| -----------| -------- | ------ | ------- | ------- | ---- |------|
Qwen2.5 0.5B |403.20 MiB|630.17 M| cpu | 4 | pp512|64.12 ± 0.26|
Qwen2.5 0.5B |403.20 MiB|630.17 M| cpu | 4 | tg128|10.03 ± 0.01|
Qwen2.5 1.5B |1011.16 MiB| 1.78 B | cpu | 4 | pp512|24.16 ± 0.02|
Qwen2.5 1.5B |1011.16 MiB| 1.78 B | cpu | 4 | tg128|3.83 ± 0.06|
Qwen2.5 3B | 1.86 GiB | 3.40 B | cpu | 4 | pp512|12.08 ± 0.02|
Qwen2.5 3B | 1.86 GiB | 3.40 B | cpu | 4 | tg128|2.23 ± 0.02|
Q4_1
| Model | Size | Params | backend | threads | test | t/s |
| -----------| -------- | ------ | ------- | ------- | ---- |------|
Qwen2.5 0.5B |351.50 MiB|494.03 M| cpu | 4 | pp512|62.07 ± 0.12|
Qwen2.5 0.5B |351.50 MiB|494.03 M| cpu | 4 | tg128|9.91 ± 0.01|
Qwen2.5 1.5B |964.06 MiB| 1.54 B | cpu | 4 | pp512|22.95 ± 0.25|
Qwen2.5 1.5B |964.06 MiB| 1.54 B | cpu | 4 | tg128|4.01 ± 0.15|
Qwen2.5 3B | 1.85 GiB | 3.09 B | cpu | 4 | pp512|11.55 ± 0.16|
Qwen2.5 3B | 1.85 GiB | 3.09 B | cpu | 4 | tg128|2.25 ± 0.04|
Q4_K
| Model | Size | Params | backend | threads | test | t/s |
| -----------| -------- | ------ | ------- | ------- | ---- |------|
Qwen2.5 0.5B |462.96 MiB|630.17 M| cpu | 4 | pp512|9.29 ± 0.05|
Qwen2.5 0.5B |462.96 MiB|630.17 M| cpu | 4 | tg128|5.67 ± 0.04|
Qwen2.5 1.5B | 1.04 GiB | 1.78 B | cpu | 4 | pp512|10.38 ± 0.10|
Qwen2.5 1.5B | 1.04 GiB | 1.78 B | cpu | 4 | tg128|3.17 ± 0.08|
Qwen2.5 3B | 1.95 GiB | 3.40 B | cpu | 4 | pp512|4.23 ± 0.04|
Qwen2.5 3B | 1.95 GiB | 3.40 B | cpu | 4 | tg128|1.73 ± 0.00|
|
