Fix regress-crbug-1520311 on big endian

Milad Fa · V8 LUCI CQ · commit 06a64da79fc8 · 2024-01-24T20:16:15.000Z
DataView is used to make sure values are written and read back correctly on BE platforms. Change-Id: I23984e0c0b65114e7027c30726080dd40cd4cbce Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/5234515 Commit-Queue: Milad Farazmand <mfarazma@redhat.com> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org> Cr-Commit-Position: refs/heads/main@{#91992}
diff --git a/test/mjsunit/regress/wasm/regress-crbug-1520311.js b/test/mjsunit/regress/wasm/regress-crbug-1520311.js
@@ -28,14 +28,14 @@ let instance = builder.instantiate();
 const kStoreIndex = 1;
 instance.exports.store(kStoreIndex);
 
-let i64 = new BigInt64Array(instance.exports.memory.buffer);
+let i64 = new DataView(instance.exports.memory.buffer);
 
-assertEquals(0n, i64[0]);
-assertEquals(42n, i64[kStoreIndex]);
+assertEquals(0n, i64.getBigInt64(0, true));
+assertEquals(42n, i64.getBigInt64(kStoreIndex * 8, true));
 
 const kLoadIndex = 10;
 const kLoadValue = 1234n;
-i64[kLoadIndex] = kLoadValue;
+i64.setBigInt64(kLoadIndex * 8, kLoadValue, true);
 let load = instance.exports.load;
 assertEquals(0n, load(kLoadIndex * 8));
 assertEquals(kLoadValue, load(kLoadIndex));
