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Wenyong Huang 365ec6360b

Update build scripts and documents of workload samples for wasi-sdk-12.0 (#484 )

Update the build scripts of sample workloads (meshoptimizer/bwa/wasm-av1) to use the wasi-sdk-12.0 firstly to build the workload and discard clang-11, as wasi-sdk-12 supports wasi, simd and pthread better. And update the related documents.
Also modify wasm mini loader to sync up with the change of wasm normal loader.

Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>

2020-12-29 14:41:09 +08:00

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"wasm-av1" sample introduction

This sample demonstrates how to build wasm-av1 into WebAssembly with simd support and run it with iwasm.

Preparation

please refer to installation instructions.

Build with wasi-sdk

$ mkdir build && cd build
$ cmake ..
$ make
# to verify
$ ls testavx.wasm

Or build with EMSDK

just run the convenience script:

./build.sh

the script builds wasm-av1 and runs it with iwasm, which basically contains the following steps:

hack emcc to delete some objects in libc.a
patch wasm-av1 and build it with emcc compiler
build iwasm with simd and libc-emcc support
run testav1.aot with iwasm

Run workload

Firstly please build iwasm with simd support:

$ cd <wamr dir>/product-mini/platforms/linux/
$ mkdir build && cd build
$ cmake .. -DWAMR_BUILD_SIMD=1 -DWAMR_BUILD_LIBC_EMCC=1
$ make

Then compile wasm file to aot file and run:

$ cd <dir of testavx.wasm>
$ <wamr dir>/wamr-compiler/build/wamrc --enable-simd -o testavx.aot testavx.wasm
# copy sample data like <wamr dir>/samples/workload/wasm-av1/av1/third_party/samples/elephants_dream_480p24.ivf
# make sure you declare the access priority of the directory in which the sample data is
$ <wamr dir>/product-mini/platforms/linux/build/iwasm --dir=. testavx.aot elephants_dream_480p24.ivf

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