llama.cpp/docs/build-riscv64-spacemit.md

This build documentation is specific only to RISC-V SpacemiT SOCs.

Build llama.cpp locally (for riscv64)

1. Prepare Toolchain For RISCV

wget https://github.com/spacemit-com/toolchain/releases/download/v1.2.4/spacemit-toolchain-linux-glibc-x86_64-v1.2.4.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 and RISCV64_SPACEMIT_IME2, 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}.

cmake -B build \
    -DCMAKE_BUILD_TYPE=Release \
    -DGGML_CPU_RISCV64_SPACEMIT=ON \
    -DGGML_CPU_REPACK=OFF \
    -DLLAMA_OPENSSL=OFF \
    -DGGML_RVV=ON \
    -DGGML_RV_ZVFH=ON \
    -DGGML_RV_ZFH=ON \
    -DGGML_RV_ZICBOP=ON \
    -DGGML_RV_ZIHINTPAUSE=ON \
    -DGGML_RV_ZBA=ON \
    -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

Quantization Support For Matrix

Quantization Type	X60	A100
Q2_K		:heavy_check_mark:
Q3_K		:heavy_check_mark:
Q4_0	:heavy_check_mark:	:heavy_check_mark:
Q4_1	:heavy_check_mark:	:heavy_check_mark:
Q4_K	:heavy_check_mark:	:heavy_check_mark:
Q5_0		:heavy_check_mark:
Q5_1		:heavy_check_mark:
Q5_K		:heavy_check_mark:
Q6_K		:heavy_check_mark:
Q8_0		:heavy_check_mark:

Performance

• Spacemit(R) X60

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

model	size	params	backend	threads	n_ubatch	fa	mmap	test	t/s
qwen35 2B Q4_1	1.19 GiB	1.88 B	CPU	4	128	1	0	pp128	10.32 ± 0.02
qwen35 2B Q4_1	1.19 GiB	1.88 B	CPU	4	128	1	0	tg128	3.07 ± 0.01
qwen3 0.6B Q4_0	358.78 MiB	596.05 M	CPU	4	128	1	0	pp128	49.15 ± 0.25
qwen3 0.6B Q4_0	358.78 MiB	596.05 M	CPU	4	128	1	0	tg128	11.73 ± 0.02

• Spacemit(R) A100

model name      : Spacemit(R) A100
isa             : rv64imafdcvh_zicbom_zicbop_zicboz_zicntr_zicond_zicsr_zifencei_zihintntl_zihintpause_zihpm_zimop_zaamo_zalrsc_zawrs_zfa_zfh_zfhmin_zca_zcb_zcd_zcmop_zba_zbb_zbc_zbs_zkt_zvbb_zvbc_zve32f_zve32x_zve64d_zve64f_zve64x_zvfh_zvfhmin_zvkb_zvkg_zvkned_zvknha_zvknhb_zvksed_zvksh_zvkt_smaia_smstateen_ssaia_sscofpmf_sstc_svinval_svnapot_svpbmt_sdtrig
mmu             : sv39
mvendorid       : 0x710
marchid         : 0x8000000041000002
mimpid          : 0x10000000d5686200
hart isa        : rv64imafdcv_zicbom_zicbop_zicboz_zicntr_zicond_zicsr_zifencei_zihintntl_zihintpause_zihpm_zimop_zaamo_zalrsc_zawrs_zfa_zfh_zfhmin_zca_zcb_zcd_zcmop_zba_zbb_zbc_zbs_zkt_zvbb_zvbc_zve32f_zve32x_zve64d_zve64f_zve64x_zvfh_zvfhmin_zvkb_zvkg_zvkned_zvknha_zvknhb_zvksed_zvksh_zvkt_smaia_smstateen_ssaia_sscofpmf_sstc_svinval_svnapot_svpbmt_sdtrig

model	size	params	backend	threads	n_ubatch	fa	mmap	test	t/s
qwen3 0.6B Q4_0	358.78 MiB	596.05 M	CPU	8	128	1	0	pp128	565.83 ± 0.31
qwen3 0.6B Q4_0	358.78 MiB	596.05 M	CPU	8	128	1	0	tg128	55.77 ± 0.02
qwen3 4B Q4_0	2.21 GiB	4.02 B	CPU	8	128	1	0	pp128	79.74 ± 0.04
qwen3 4B Q4_0	2.21 GiB	4.02 B	CPU	8	128	1	0	tg128	11.29 ± 0.00
qwen3moe 30B.A3B Q4_0	16.18 GiB	30.53 B	CPU	8	128	1	0	pp128	57.88 ± 0.31
qwen3moe 30B.A3B Q4_0	16.18 GiB	30.53 B	CPU	8	128	1	0	tg128	12.79 ± 0.00
qwen35 2B Q4_1	1.19 GiB	1.88 B	CPU	8	128	1	0	pp128	115.23 ± 0.04
qwen35 2B Q4_1	1.19 GiB	1.88 B	CPU	8	128	1	0	tg128	16.49 ± 0.01
gemma4 E4B Q4_K - Medium	4.76 GiB	7.52 B	CPU	8	128	1	0	pp128	21.13 ± 0.01
gemma4 E4B Q4_K - Medium	4.76 GiB	7.52 B	CPU	8	128	1	0	tg128	5.66 ± 0.00