tor-browser

The Tor Browser
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arithmetic.js (2904B)

      1 // Copyright (C) 2017 Josh Wolfe. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-bigint.asintn
      5 description: BigInt.asIntN arithmetic test cases
      6 info: |
      7  BigInt.asIntN ( bits, bigint )
      8 
      9  3. Let mod be a BigInt representing bigint modulo 2**bits.
     10  4. If mod ≥ 2**bits - 1, return mod - 2**bits; otherwise, return mod.
     11 
     12 features: [BigInt]
     13 ---*/
     14 
     15 assert.sameValue(BigInt.asIntN(0, -2n), 0n);
     16 assert.sameValue(BigInt.asIntN(0, -1n), 0n);
     17 assert.sameValue(BigInt.asIntN(0, 0n), 0n);
     18 assert.sameValue(BigInt.asIntN(0, 1n), 0n);
     19 assert.sameValue(BigInt.asIntN(0, 2n), 0n);
     20 
     21 assert.sameValue(BigInt.asIntN(1, -3n), -1n);
     22 assert.sameValue(BigInt.asIntN(1, -2n), 0n);
     23 assert.sameValue(BigInt.asIntN(1, -1n), -1n);
     24 assert.sameValue(BigInt.asIntN(1, 0n), 0n);
     25 assert.sameValue(BigInt.asIntN(1, 1n), -1n);
     26 assert.sameValue(BigInt.asIntN(1, 2n), 0n);
     27 assert.sameValue(BigInt.asIntN(1, 3n), -1n);
     28 assert.sameValue(BigInt.asIntN(1, -123456789012345678901n), -1n);
     29 assert.sameValue(BigInt.asIntN(1, -123456789012345678900n), 0n);
     30 assert.sameValue(BigInt.asIntN(1, 123456789012345678900n), 0n);
     31 assert.sameValue(BigInt.asIntN(1, 123456789012345678901n), -1n);
     32 
     33 assert.sameValue(BigInt.asIntN(2, -3n), 1n);
     34 assert.sameValue(BigInt.asIntN(2, -2n), -2n);
     35 assert.sameValue(BigInt.asIntN(2, -1n), -1n);
     36 assert.sameValue(BigInt.asIntN(2, 0n), 0n);
     37 assert.sameValue(BigInt.asIntN(2, 1n), 1n);
     38 assert.sameValue(BigInt.asIntN(2, 2n), -2n);
     39 assert.sameValue(BigInt.asIntN(2, 3n), -1n);
     40 assert.sameValue(BigInt.asIntN(2, -123456789012345678901n), -1n);
     41 assert.sameValue(BigInt.asIntN(2, -123456789012345678900n), 0n);
     42 assert.sameValue(BigInt.asIntN(2, 123456789012345678900n), 0n);
     43 assert.sameValue(BigInt.asIntN(2, 123456789012345678901n), 1n);
     44 
     45 assert.sameValue(BigInt.asIntN(8, 0xabn), -0x55n);
     46 assert.sameValue(BigInt.asIntN(8, 0xabcdn), -0x33n);
     47 assert.sameValue(BigInt.asIntN(8, 0xabcdef01n), 0x01n);
     48 assert.sameValue(BigInt.asIntN(8, 0xabcdef0123456789abcdef0123n), 0x23n);
     49 assert.sameValue(BigInt.asIntN(8, 0xabcdef0123456789abcdef0183n), -0x7dn);
     50 
     51 assert.sameValue(BigInt.asIntN(64, 0xabcdef0123456789abcdefn), 0x0123456789abcdefn);
     52 assert.sameValue(BigInt.asIntN(65, 0xabcdef0123456789abcdefn), -0xfedcba9876543211n);
     53 
     54 assert.sameValue(BigInt.asIntN(200,
     55  0xcffffffffffffffffffffffffffffffffffffffffffffffffffn), -0x00000000000000000000000000000000000000000000000001n);
     56 assert.sameValue(BigInt.asIntN(201,
     57    0xcffffffffffffffffffffffffffffffffffffffffffffffffffn),
     58  0xffffffffffffffffffffffffffffffffffffffffffffffffffn
     59 );
     60 
     61 assert.sameValue(BigInt.asIntN(200,
     62  0xc89e081df68b65fedb32cffea660e55df9605650a603ad5fc54n), -0x761f7e209749a0124cd3001599f1aa2069fa9af59fc52a03acn);
     63 assert.sameValue(BigInt.asIntN(201,
     64    0xc89e081df68b65fedb32cffea660e55df9605650a603ad5fc54n),
     65  0x89e081df68b65fedb32cffea660e55df9605650a603ad5fc54n
     66 );
     67 
     68 reportCompare(0, 0);