| // Copyright (C) 2017 Josh Wolfe. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| description: Bitwise AND for BigInt values |
| esid: sec-bitwise-op |
| info: | |
| BitwiseOp(op, x, y) |
| |
| 1. Let result be 0. |
| 2. Let shift be 0. |
| 3. Repeat, until (x = 0 or x = -1) and (y = 0 or y = -1), |
| a. Let xDigit be x modulo 2. |
| b. Let yDigit be y modulo 2. |
| c. Let result be result + 2**shift * op(xDigit, yDigit) |
| d. Let shift be shift + 1. |
| e. Let x be (x - xDigit) / 2. |
| f. Let y be (y - yDigit) / 2. |
| 4. If op(x modulo 2, y modulo 2) ≠ 0, |
| a. Let result be result - 2**shift. NOTE: This extends the sign. |
| 5. Return result. |
| |
| features: [BigInt] |
| ---*/ |
| |
| assert.sameValue(0b00n & 0b00n, 0b00n, "0b00n & 0b00n === 0b00n"); |
| assert.sameValue(0b00n & 0b01n, 0b00n, "0b00n & 0b01n === 0b00n"); |
| assert.sameValue(0b01n & 0b00n, 0b00n, "0b01n & 0b00n === 0b00n"); |
| assert.sameValue(0b00n & 0b10n, 0b00n, "0b00n & 0b10n === 0b00n"); |
| assert.sameValue(0b10n & 0b00n, 0b00n, "0b10n & 0b00n === 0b00n"); |
| assert.sameValue(0b00n & 0b11n, 0b00n, "0b00n & 0b11n === 0b00n"); |
| assert.sameValue(0b11n & 0b00n, 0b00n, "0b11n & 0b00n === 0b00n"); |
| assert.sameValue(0b01n & 0b01n, 0b01n, "0b01n & 0b01n === 0b01n"); |
| assert.sameValue(0b01n & 0b10n, 0b00n, "0b01n & 0b10n === 0b00n"); |
| assert.sameValue(0b10n & 0b01n, 0b00n, "0b10n & 0b01n === 0b00n"); |
| assert.sameValue(0b01n & 0b11n, 0b01n, "0b01n & 0b11n === 0b01n"); |
| assert.sameValue(0b11n & 0b01n, 0b01n, "0b11n & 0b01n === 0b01n"); |
| assert.sameValue(0b10n & 0b10n, 0b10n, "0b10n & 0b10n === 0b10n"); |
| assert.sameValue(0b10n & 0b11n, 0b10n, "0b10n & 0b11n === 0b10n"); |
| assert.sameValue(0b11n & 0b10n, 0b10n, "0b11n & 0b10n === 0b10n"); |
| assert.sameValue(0xffffffffn & 0n, 0n, "0xffffffffn & 0n === 0n"); |
| assert.sameValue(0n & 0xffffffffn, 0n, "0n & 0xffffffffn === 0n"); |
| assert.sameValue(0xffffffffn & 0xffffffffn, 0xffffffffn, "0xffffffffn & 0xffffffffn === 0xffffffffn"); |
| assert.sameValue(0xffffffffffffffffn & 0n, 0n, "0xffffffffffffffffn & 0n === 0n"); |
| assert.sameValue(0n & 0xffffffffffffffffn, 0n, "0n & 0xffffffffffffffffn === 0n"); |
| assert.sameValue(0xffffffffffffffffn & 0xffffffffn, 0xffffffffn, "0xffffffffffffffffn & 0xffffffffn === 0xffffffffn"); |
| assert.sameValue(0xffffffffn & 0xffffffffffffffffn, 0xffffffffn, "0xffffffffn & 0xffffffffffffffffn === 0xffffffffn"); |
| assert.sameValue( |
| 0xffffffffffffffffn & 0xffffffffffffffffn, 0xffffffffffffffffn, |
| "0xffffffffffffffffn & 0xffffffffffffffffn === 0xffffffffffffffffn"); |
| assert.sameValue( |
| 0xbf2ed51ff75d380fd3be813ec6185780n & 0x4aabef2324cedff5387f1f65n, 0x42092803008e813400181700n, |
| "0xbf2ed51ff75d380fd3be813ec6185780n & 0x4aabef2324cedff5387f1f65n === 0x42092803008e813400181700n"); |
| assert.sameValue( |
| 0x4aabef2324cedff5387f1f65n & 0xbf2ed51ff75d380fd3be813ec6185780n, 0x42092803008e813400181700n, |
| "0x4aabef2324cedff5387f1f65n & 0xbf2ed51ff75d380fd3be813ec6185780n === 0x42092803008e813400181700n"); |
| assert.sameValue(0n & -1n, 0n, "0n & -1n === 0n"); |
| assert.sameValue(-1n & 0n, 0n, "-1n & 0n === 0n"); |
| assert.sameValue(0n & -2n, 0n, "0n & -2n === 0n"); |
| assert.sameValue(-2n & 0n, 0n, "-2n & 0n === 0n"); |
| assert.sameValue(1n & -2n, 0n, "1n & -2n === 0n"); |
| assert.sameValue(-2n & 1n, 0n, "-2n & 1n === 0n"); |
| assert.sameValue(2n & -2n, 2n, "2n & -2n === 2n"); |
| assert.sameValue(-2n & 2n, 2n, "-2n & 2n === 2n"); |
| assert.sameValue(2n & -3n, 0n, "2n & -3n === 0n"); |
| assert.sameValue(-3n & 2n, 0n, "-3n & 2n === 0n"); |
| assert.sameValue(-1n & -2n, -2n, "-1n & -2n === -2n"); |
| assert.sameValue(-2n & -1n, -2n, "-2n & -1n === -2n"); |
| assert.sameValue(-2n & -2n, -2n, "-2n & -2n === -2n"); |
| assert.sameValue(-2n & -3n, -4n, "-2n & -3n === -4n"); |
| assert.sameValue(-3n & -2n, -4n, "-3n & -2n === -4n"); |
| assert.sameValue(0xffffffffn & -1n, 0xffffffffn, "0xffffffffn & -1n === 0xffffffffn"); |
| assert.sameValue(-1n & 0xffffffffn, 0xffffffffn, "-1n & 0xffffffffn === 0xffffffffn"); |
| assert.sameValue(0xffffffffffffffffn & -1n, 0xffffffffffffffffn, "0xffffffffffffffffn & -1n === 0xffffffffffffffffn"); |
| assert.sameValue(-1n & 0xffffffffffffffffn, 0xffffffffffffffffn, "-1n & 0xffffffffffffffffn === 0xffffffffffffffffn"); |
| assert.sameValue( |
| 0xbf2ed51ff75d380fd3be813ec6185780n & -0x4aabef2324cedff5387f1f65n, 0xbf2ed51fb554100cd330000ac6004080n, |
| "0xbf2ed51ff75d380fd3be813ec6185780n & -0x4aabef2324cedff5387f1f65n === 0xbf2ed51fb554100cd330000ac6004080n"); |
| assert.sameValue( |
| -0x4aabef2324cedff5387f1f65n & 0xbf2ed51ff75d380fd3be813ec6185780n, 0xbf2ed51fb554100cd330000ac6004080n, |
| "-0x4aabef2324cedff5387f1f65n & 0xbf2ed51ff75d380fd3be813ec6185780n === 0xbf2ed51fb554100cd330000ac6004080n"); |
| assert.sameValue( |
| -0xbf2ed51ff75d380fd3be813ec6185780n & 0x4aabef2324cedff5387f1f65n, 0x8a2c72024405ec138670800n, |
| "-0xbf2ed51ff75d380fd3be813ec6185780n & 0x4aabef2324cedff5387f1f65n === 0x8a2c72024405ec138670800n"); |
| assert.sameValue( |
| 0x4aabef2324cedff5387f1f65n & -0xbf2ed51ff75d380fd3be813ec6185780n, 0x8a2c72024405ec138670800n, |
| "0x4aabef2324cedff5387f1f65n & -0xbf2ed51ff75d380fd3be813ec6185780n === 0x8a2c72024405ec138670800n"); |
| assert.sameValue( |
| -0xbf2ed51ff75d380fd3be813ec6185780n & -0x4aabef2324cedff5387f1f65n, -0xbf2ed51fffffff2ff7fedffffe7f5f80n, |
| "-0xbf2ed51ff75d380fd3be813ec6185780n & -0x4aabef2324cedff5387f1f65n === -0xbf2ed51fffffff2ff7fedffffe7f5f80n"); |
| assert.sameValue( |
| -0x4aabef2324cedff5387f1f65n & -0xbf2ed51ff75d380fd3be813ec6185780n, -0xbf2ed51fffffff2ff7fedffffe7f5f80n, |
| "-0x4aabef2324cedff5387f1f65n & -0xbf2ed51ff75d380fd3be813ec6185780n === -0xbf2ed51fffffff2ff7fedffffe7f5f80n"); |
| assert.sameValue(-0xffffffffn & 0n, 0n, "-0xffffffffn & 0n === 0n"); |
| assert.sameValue(0n & -0xffffffffn, 0n, "0n & -0xffffffffn === 0n"); |
| assert.sameValue( |
| -0xffffffffffffffffn & 0x10000000000000000n, 0x10000000000000000n, |
| "-0xffffffffffffffffn & 0x10000000000000000n === 0x10000000000000000n"); |
| assert.sameValue( |
| 0x10000000000000000n & -0xffffffffffffffffn, 0x10000000000000000n, |
| "0x10000000000000000n & -0xffffffffffffffffn === 0x10000000000000000n"); |
| assert.sameValue( |
| -0xffffffffffffffffffffffffn & 0x10000000000000000n, 0n, |
| "-0xffffffffffffffffffffffffn & 0x10000000000000000n === 0n"); |
| assert.sameValue( |
| 0x10000000000000000n & -0xffffffffffffffffffffffffn, 0n, |
| "0x10000000000000000n & -0xffffffffffffffffffffffffn === 0n"); |