v8/test/mjsunit/wasm/globals.js

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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --expose-wasm
load("test/mjsunit/wasm/wasm-constants.js");
load("test/mjsunit/wasm/wasm-module-builder.js");
function TestImported(type, val, expected) {
print("TestImported " + type + "(" + val +")" + " = " + expected);
var builder = new WasmModuleBuilder();
var sig = makeSig([], [type]);
var g = builder.addImportedGlobal("foo", undefined, type);
builder.addFunction("main", sig)
.addBody([kExprGetGlobal, g.index])
.exportAs("main");
builder.addGlobal(kAstI32); // pad
var instance = builder.instantiate({foo: val});
assertEquals(expected, instance.exports.main());
}
TestImported(kAstI32, 300.1, 300);
TestImported(kAstF32, 87234.87238, Math.fround(87234.87238));
TestImported(kAstF64, 77777.88888, 77777.88888);
TestImported(kAstF64, "89", 89);
function TestExported(type, val, expected) {
print("TestExported " + type + "(" + val +")" + " = " + expected);
var builder = new WasmModuleBuilder();
var sig = makeSig([type], []);
builder.addGlobal(kAstI32); // pad
var g = builder.addGlobal(type, false)
.exportAs("foo");
g.init = val;
builder.addGlobal(kAstI32); // pad
var instance = builder.instantiate();
assertEquals(expected, instance.exports.foo);
}
TestExported(kAstI32, 455.5, 455);
TestExported(kAstF32, -999.34343, Math.fround(-999.34343));
TestExported(kAstF64, 87347.66666, 87347.66666);
function TestImportedExported(type, val, expected) {
print("TestImportedExported " + type + "(" + val +")" + " = " + expected);
var builder = new WasmModuleBuilder();
var sig = makeSig([type], []);
var i = builder.addImportedGlobal("foo", undefined, type);
builder.addGlobal(kAstI32); // pad
var o = builder.addGlobal(type, false)
.exportAs("bar");
o.init_index = i;
builder.addGlobal(kAstI32); // pad
var instance = builder.instantiate({foo: val});
assertEquals(expected, instance.exports.bar);
}
TestImportedExported(kAstI32, 415.5, 415);
TestImportedExported(kAstF32, -979.34343, Math.fround(-979.34343));
TestImportedExported(kAstF64, 81347.66666, 81347.66666);