| #!/bin/bash |
| # Copyright 2020 Google LLC |
| # |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| # This script takes a path to a .cpp file, compiles the file to wasm using emscripten, outputs |
| # textual representations of all wasm SIMD operations present in the compiled .wasm, and starts |
| # a static file server so that the running .wasm can be manually inspect in a browser. |
| # |
| # Example usage: ./build_simd_test.sh simd_float_capabilities.cpp |
| |
| # Requires that emscripten and wasm2wat are added to your PATH. |
| # Requires, and is verified to work with |
| # - The output of `wasm2wat --version` should be `1.0.13 (1.0.17)` |
| # - install from here: https://github.com/WebAssembly/wabt |
| # - emscripten 1.39.16 |
| # - Chrome Canary 86.0.4186.0 with chrome://flags#enable-webassembly-simd enabled |
| |
| # build the file specified as the first argument with SIMD enabled. |
| em++ $1 -I ../../../../ -msimd128 -Os -s WASM=1 -o output/simd_test.html |
| # convert the output WASM to a human readable text format (.wat) |
| wasm2wat --enable-simd output/simd_test.wasm > output/simd_test.wat |
| |
| # The following lines output all SIMD operations produced in the output WASM. |
| # Useful for checking that SIMD instructions are actually being used. |
| # e.g. for the following C++ code: |
| # auto vec1 = skvx::Vec<2, double>({11.f, -22.f}) + skvx::Vec<2, double>({13.f, -1.f}); |
| # it is expected that the f64x2.add operation is present in the output WASM. |
| echo "The following WASM SIMD operations were used in the compiled code:" |
| grep -f wasm_simd_types.txt output/simd_test.wat |
| |
| # Serve the compiled WASM so output can be manually inspected for correctness. |
| echo "Go check out http://localhost:8000/output/simd_test.html in Chrome Canary 86.0.4186.0 \ |
| or later and enable the chrome://flags#enable-webassembly-simd flag!" |
| python3 ../../../../tools/serve_wasm.py |