3ef16185e4
Originally reviewed at https://chromium-review.googlesource.com/929429
and landed as r51486 / d50c7731e8.
Update in reland: whitelisted new builtins as side effect free.
Bug: v8:6791
Change-Id: Iff45700c8a4eca23f3ee6fc9c0cb340dc027cbc6
Reviewed-on: https://chromium-review.googlesource.com/932802
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51491}
79 lines
2.5 KiB
JavaScript
79 lines
2.5 KiB
JavaScript
// Copyright 2018 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: --harmony-bigint
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var buffer = new ArrayBuffer(64);
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var dataview = new DataView(buffer, 8, 24);
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var bytes = new Uint8Array(buffer);
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var b1 = 0xff1234567890abcdefn;
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var b1_64 = BigInt.asUintN(64, b1);
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dataview.setBigInt64(8, b1);
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assertEquals(0x12, bytes[16]);
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assertEquals(0x34, bytes[17]);
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assertEquals(0x56, bytes[18]);
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assertEquals(0x78, bytes[19]);
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assertEquals(0x90, bytes[20]);
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assertEquals(0xab, bytes[21]);
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assertEquals(0xcd, bytes[22]);
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assertEquals(0xef, bytes[23]);
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assertEquals(b1_64, dataview.getBigInt64(8));
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dataview.setBigInt64(8, b1, true); // Little-endian.
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assertEquals(0xef, bytes[16]);
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assertEquals(0xcd, bytes[17]);
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assertEquals(0xab, bytes[18]);
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assertEquals(0x90, bytes[19]);
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assertEquals(0x78, bytes[20]);
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assertEquals(0x56, bytes[21]);
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assertEquals(0x34, bytes[22]);
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assertEquals(0x12, bytes[23]);
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assertEquals(b1_64, dataview.getBigInt64(8, true));
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dataview.setBigUint64(8, b1);
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assertEquals(0x12, bytes[16]);
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assertEquals(0x34, bytes[17]);
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assertEquals(0x56, bytes[18]);
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assertEquals(0x78, bytes[19]);
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assertEquals(0x90, bytes[20]);
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assertEquals(0xab, bytes[21]);
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assertEquals(0xcd, bytes[22]);
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assertEquals(0xef, bytes[23]);
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assertEquals(b1_64, dataview.getBigUint64(8));
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dataview.setBigUint64(8, b1, true); // Little-endian.
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assertEquals(0xef, bytes[16]);
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assertEquals(0xcd, bytes[17]);
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assertEquals(0xab, bytes[18]);
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assertEquals(0x90, bytes[19]);
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assertEquals(0x78, bytes[20]);
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assertEquals(0x56, bytes[21]);
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assertEquals(0x34, bytes[22]);
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assertEquals(0x12, bytes[23]);
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assertEquals(b1_64, dataview.getBigUint64(8, true));
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var b2 = -0x76543210fedcba98n;
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dataview.setBigInt64(8, b2, true);
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assertEquals(0x68, bytes[16]);
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assertEquals(0x45, bytes[17]);
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assertEquals(0x23, bytes[18]);
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assertEquals(0x01, bytes[19]);
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assertEquals(0xef, bytes[20]);
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assertEquals(0xcd, bytes[21]);
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assertEquals(0xab, bytes[22]);
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assertEquals(0x89, bytes[23]);
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assertEquals(b2, dataview.getBigInt64(8, true));
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assertEquals(0x89abcdef01234568n, dataview.getBigUint64(8, true));
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assertThrows(() => dataview.setBigInt64(0, 1), TypeError);
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assertThrows(() => dataview.setBigUint64(0, 1), TypeError);
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assertThrows(() => dataview.setInt32(0, 1n), TypeError);
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assertThrows(() => dataview.setUint32(0, 1n), TypeError);
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// None of the stores wrote out of bounds.
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for (var i = 0; i < 16; i++) assertEquals(0, bytes[i]);
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for (var i = 24; i < 64; i++) assertEquals(0, bytes[i]);
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