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July 20, 2019 14:49
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Bubble Sort in WebAssembly
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| const MAX_NUM = 1 << 16; | |
| const SIZE = 32; | |
| const memory = new WebAssembly.Memory({ initial: 1 }); | |
| const importObject = { | |
| js: { | |
| mem: memory, | |
| }, | |
| }; | |
| WebAssembly | |
| .instantiateStreaming(fetch('bubble.wasm'), importObject) | |
| .then(results => { | |
| const { instance } = results; | |
| // Generate an array with random integers | |
| let l = new Int32Array(memory.buffer, 0, SIZE); | |
| for (let i = 0; i < SIZE; i++) { | |
| l[i] = Math.floor(Math.random() * (MAX_NUM + 1)); | |
| } | |
| // Run bubble sort | |
| console.log("Input", l); | |
| instance.exports.sort(0, l.length); | |
| console.log("Output", l); | |
| }); |
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| asm ` jsmem sort | |
| hf At!A !@@ N Aj!@@ N ( ! ( ! J@ 6 6 Aj! Aj! |
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| (module | |
| (import "js" "mem" (memory 1)) | |
| (func (export "sort") (param $offset i32) (param $size i32) | |
| (local $i i32) | |
| (local $j i32) | |
| (local $limit i32) | |
| (local $x i32) | |
| (local $y i32) | |
| (set_local $limit (i32.shl (get_local $size) (i32.const 2))) | |
| (set_local $i (i32.const 0)) | |
| (block $exit (loop $loop | |
| (br_if $exit (i32.ge_s (get_local $i) (get_local $limit))) | |
| (set_local $j (i32.add (get_local $i) (i32.const 4))) | |
| (block $exit2 (loop $loop2 | |
| (br_if $exit2 (i32.ge_s (get_local $j) (get_local $limit))) | |
| (set_local $x (i32.load (get_local $i))) | |
| (set_local $y (i32.load (get_local $j))) | |
| (if (i32.gt_s (get_local $x) (get_local $y)) (then | |
| (i32.store (get_local $i) (get_local $y)) | |
| (i32.store (get_local $j) (get_local $x)) | |
| )) | |
| (set_local $j (i32.add (get_local $j) (i32.const 4))) | |
| (br $loop2) | |
| )) | |
| (set_local $i (i32.add (get_local $i) (i32.const 4))) | |
| (br $loop) | |
| ) | |
| ) | |
| ) | |
| ) |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Bubble Sort in WebAssembly</title> | |
| </head> | |
| <body> | |
| <h1>Bubble Sort in WebAssembly</h1> | |
| <script src="bubble.js"></script> | |
| </body> | |
| </html> |
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| #!/usr/bin/env python3 | |
| import http.server | |
| import socketserver | |
| PORT = 8000 | |
| Handler = http.server.SimpleHTTPRequestHandler | |
| Handler.extensions_map[".wasm"] = "application/wasm" | |
| if __name__ == "__main__": | |
| with socketserver.TCPServer(("", PORT), Handler) as httpd: | |
| print("serving at port", PORT) | |
| httpd.serve_forever() |
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