2ec2bda84b
Changes:
- Add WasmInitExpr class which knows how to create initializer
expressions as pairs of {type, value}. Also define a default for every
type. Emit such pairs to a byte array with emit_init_expr().
- Add an initializer expression to every global (addGlobal() uses the
default if the argument is absent).
- Introduce wasmI64Const();
- Update tests as needed.
Change-Id: I75ffe96604891506ad78bd3677ce1efe5e0cee07
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2851892
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74231}
51 lines
1.8 KiB
JavaScript
51 lines
1.8 KiB
JavaScript
// Copyright 2020 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: --experimental-wasm-simd
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load("test/mjsunit/wasm/wasm-module-builder.js");
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// Test for S128 global with initialization.
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// This checks for a bug in copying the immediate values from the
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// initialization expression into the globals area of the module.
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(function TestS128GlobalInitialization() {
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var builder = new WasmModuleBuilder();
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var g = builder.addGlobal(
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kWasmS128, false, WasmInitExpr.S128Const(
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[1, 0, 0, 0, 2, 0, 0, 0, 3, 0, 0, 0, 4, 0, 0, 0]));
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// Check that all lanes have the right values by creating 4 functions that
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// extract each lane.
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function addGetFunction(i) {
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builder.addFunction(`get${i}`, kSig_i_v)
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.addBody([
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kExprGlobalGet, g.index,
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kSimdPrefix, kExprI32x4ExtractLane, i])
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.exportAs(`get${i}`);
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}
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for (let i = 0; i < 4; i++) {
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addGetFunction(i);
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}
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var instance = builder.instantiate();
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for (let i = 0; i < 4; i++) {
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// get0 will get lane0, which has value 1
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assertEquals(i+1, instance.exports[`get${i}`]());
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}
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})();
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(function TestS128GlobalImport() {
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// We want to test that a module with an imported V128 global does not crash.
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// But that is a bit tricky because:
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// 1. WebAssembly.Global({value: 'v128'}) is an error
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// 2. WebAssembly.Global of any other type is a type mismatch error
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// So here, we do 2. in order to get further along the code path, where
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// previously it would have crashed, it now checks for v128 and exits early.
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var builder = new WasmModuleBuilder();
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var g = builder.addImportedGlobal('m', 'foo', kWasmS128);
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assertThrows(() => builder.instantiate({m: {foo: 0}}));
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})();
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