nodejs/deps/v8/test/mjsunit/regress/wasm/regress-13700.js

// Copyright 2023 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: --no-liftoff

d8.file.execute("test/mjsunit/wasm/wasm-module-builder.js");

let bases = [0n, 1234n, 4294967296n, -4294967297n];
let expects = [0n, 1234n, 0n, -1n];

for (let i = 0; i < bases.length; ++i) {
  let builder = new WasmModuleBuilder();
  let g0 = builder.addImportedGlobal("mod", "g0", kWasmI64, true);
  builder.addExportOfKind('g0', kExternalGlobal, g0);

  builder.addFunction("trunci64", kSig_v_v)
    .addBody([
      kExprGlobalGet, g0,
      kExprI32ConvertI64,
      kExprI64SConvertI32,
      kExprGlobalSet, g0,
    ]).exportAs("trunci64");

  let to_imported =
      new WebAssembly.Global({value: 'i64', mutable: true}, bases[i]);
  let instance = builder.instantiate({mod: { g0: to_imported }});

  assertEquals(bases[i], instance.exports.g0.value);
  instance.exports.trunci64();
  assertEquals(expects[i], instance.exports.g0.value);
}

for (let i = 0; i < bases.length; ++i) {
  let builder = new WasmModuleBuilder();
  builder.addMemory(1, 1);
  builder.exportMemoryAs("memory");

  builder.addFunction("trunci64", kSig_l_v).exportFunc().addBody([
    kExprI32Const, 0,  // address for load: 0
    kExprI64LoadMem, 0, 0,  // alignment 0, offset 0
    kExprI32ConvertI64,
    kExprI64SConvertI32,
  ]);

  let instance = builder.instantiate();

  let mem = new DataView(instance.exports.memory.buffer)
  mem.setBigInt64(0, bases[i], true);
  let result = instance.exports.trunci64();
  assertEquals(result, expects[i]);
}