How to use wasmSignedLeb method in wpt

Best JavaScript code snippet using wpt

many-modules.js

Source: many-modules.js Github

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...8/​/​ especially on simulator builds. The bytes contain a sentinel which is later9/​/​ patched to different constants. This makes the modules distinct and forces10/​/​ the engine to create different code for them.11/​/​ This is the sentinel placed in the bytes. It's a 5 byte LEB-encoded integer.12const sentinel = wasmSignedLeb(0x12345678);13assertEquals(5, sentinel.length);14const builder = new WasmModuleBuilder();15builder.addFunction('f', kSig_i_i).addBody([kExprI32Const, ...sentinel]);16const module_bytes = builder.toBuffer();17/​/​ Checks whether {module_bytes[i .. i+sentinel.length]} matches {sentinel}.18const has_sentinel = (i, k = 0) => module_bytes[i + k] == sentinel[k] &&19 (k == sentinel.length - 1 || has_sentinel(i, k + 1));20/​/​ Now find the sentinel.21const find_sentinel = i =>22 module_bytes.slice(i).findIndex((e, i) => has_sentinel(i));23const sentinel_position = find_sentinel(0);24assertTrue(has_sentinel(sentinel_position), 'found sentinel');25assertEquals(-1, find_sentinel(sentinel_position + 1), 'exactly one sentinel');26/​/​ Generating {num_modules} modules should not run out of memory, since the code27/​/​ space needed per module is quite low.28const num_modules = 10000;29/​/​ Keep all generated modules alive.30const modules = [];31/​/​ Reset sentinel section to nops so that shorter LEBs will just be followed by32/​/​ nops. This resion will be patched in the loop with values of increasing size.33module_bytes.set(Array(sentinel.length).fill(_ => kExprNop), sentinel_position);34for (let i = 0; i < num_modules; ++i) {35 if (i % 50 == 0) print(i);36 module_bytes.set(wasmSignedLeb(i), sentinel_position);37 modules.push(new WebAssembly.Module(module_bytes));...

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Using AI Code Generation

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1const builder = new WasmModuleBuilder();2builder.addFunction("f", kSig_i_i)3 .addBody([4 .exportFunc();5const buffer = builder.toBuffer();6const module = new WebAssembly.Module(buffer);7const instance = new WebAssembly.Instance(module);8const f = instance.exports.f;9const builder = new WasmModuleBuilder();10builder.addFunction("f", kSig_i_i)11 .addBody([

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Using AI Code Generation

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1var input = new Uint8Array([0x00]);2var result = wasmSignedLeb(input, 0);3var input = new Uint8Array([0x7F]);4var result = wasmSignedLeb(input, 0);5var input = new Uint8Array([0x80]);6var result = wasmSignedLeb(input, 0);7var input = new Uint8Array([0x81]);8var result = wasmSignedLeb(input, 0);9var input = new Uint8Array([0x01, 0x00]);10var result = wasmSignedLeb(input, 0);11var input = new Uint8Array([0x01, 0x7F]);12var result = wasmSignedLeb(input, 0);13var input = new Uint8Array([0x81, 0x00]);14var result = wasmSignedLeb(input, 0);15var input = new Uint8Array([0x81, 0x7F]);16var result = wasmSignedLeb(input, 0);17var input = new Uint8Array([0x01, 0x80, 0x00]);18var result = wasmSignedLeb(input, 0);19var input = new Uint8Array([0x01, 0x80, 0x7F]);20var result = wasmSignedLeb(input, 0);

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