46 lines
1014 B
JavaScript
46 lines
1014 B
JavaScript
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// Copyright 2023 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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const initial = 2**16;
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const max = 4 * initial;
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const memory = new ArrayBuffer(initial, { maxByteLength: max } );
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const heap = memory;
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function builder(stdlib, foreign, heap) {
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"use asm";
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const mem = new stdlib.Float64Array(heap);
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function add(x, y) {
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x = +x;
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y = +y;
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mem[0] = +x;
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mem[1] = +y;
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return +mem[0] + +mem[1];
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}
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return {add: add};
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}
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// Check that the asm.js module can be instantiated in the asm.js pipeline.
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builder(globalThis, undefined, new ArrayBuffer(initial));
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assertTrue(%IsAsmWasmCode(builder));
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const asm_js_module = builder(globalThis, undefined, heap);
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memory.resize(8);
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// Memory access out of bounds should return NaN.
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assertEquals(NaN, asm_js_module.add(4, 56));
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memory.resize(16);
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const foo = new Float64Array(memory);
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assertEquals(0, foo[1]);
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