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7298a38552
sourceRevisionAtLastExport: 33f2fb0e53d135f0ee17cfccd9d993eb2a6f47de targetRevisionAtLastExport: 31340cbd9add103f586d501b0c3354b7b182abc0
89 lines
2.8 KiB
JavaScript
89 lines
2.8 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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var b3 = -0x8000000000000000n; // The int64_t minimum value.
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dataview.setBigInt64(8, b3);
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assertEquals(b3, dataview.getBigInt64(8));
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assertEquals(-b3, dataview.getBigUint64(8));
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var b4 = 0x8000000000000000n;
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dataview.setBigInt64(8, b4);
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assertEquals(-b4, dataview.getBigInt64(8));
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assertEquals(b4, dataview.getBigUint64(8));
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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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