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Diffstat (limited to 'files/docs')
| -rw-r--r-- | files/docs/environment_variables.md | 3 | ||||
| -rw-r--r-- | files/docs/getting_started.md | 29 |
2 files changed, 32 insertions, 0 deletions
diff --git a/files/docs/environment_variables.md b/files/docs/environment_variables.md index dd5d59fb..4eb09659 100644 --- a/files/docs/environment_variables.md +++ b/files/docs/environment_variables.md @@ -40,6 +40,9 @@ By default the cpu is detected and the most advanced form of SIMD is used. But LIBYUV_DISABLE_LSX LIBYUV_DISABLE_LASX +## RISCV CPUs + LIBYUV_DISABLE_RVV + # Test Width/Height/Repeat The unittests default to a small image (128x72) to run fast. This can be set by environment variable to test a specific resolutions. diff --git a/files/docs/getting_started.md b/files/docs/getting_started.md index 15b19ab2..b19f0009 100644 --- a/files/docs/getting_started.md +++ b/files/docs/getting_started.md @@ -220,6 +220,35 @@ Install cmake: http://www.cmake.org/ make -j4 make package +## Building RISC-V target with cmake + +### Prerequisite: build risc-v clang toolchain and qemu + +If you don't have prebuilt clang and riscv64 qemu, run the script to download source and build them. + + ./riscv_script/prepare_toolchain_qemu.sh + +After running script, clang & qemu are built in `build-toolchain-qemu/riscv-clang/` & `build-toolchain-qemu/riscv-qemu/`. + +### Cross-compile for RISC-V target + cmake -B out/Release/ -DUNIT_TEST=ON \ + -DCMAKE_BUILD_TYPE=Release \ + -DCMAKE_TOOLCHAIN_FILE="./riscv_script/riscv-clang.cmake" \ + -DTOOLCHAIN_PATH={TOOLCHAIN_PATH} \ + -DUSE_RVV=ON . + cmake --build out/Release/ + + +### Run on QEMU + +#### Run libyuv_unittest on QEMU + cd out/Release/ + USE_RVV=ON \ + TOOLCHAIN_PATH={TOOLCHAIN_PATH} \ + QEMU_PREFIX_PATH={QEMU_PREFIX_PATH} \ + ../../riscv_script/run_qemu.sh libyuv_unittest + + ## Setup for Arm Cross compile See also https://www.ccoderun.ca/programming/2015-12-20_CrossCompiling/index.html |