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NBKDoubleWidth+Bits.swift
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//=----------------------------------------------------------------------------=
// This source file is part of the Numberick open source project.
//
// Copyright (c) 2023 Oscar Byström Ericsson
// Licensed under Apache License, Version 2.0
//
// See http://www.apache.org/licenses/LICENSE-2.0 for license information.
//=----------------------------------------------------------------------------=
import NBKCoreKit
import NBKDoubleWidthKit
import XCTest
private typealias X64 = NBK.U256X64
private typealias X32 = NBK.U256X32
//*============================================================================*
// MARK: * NBK x Double Width x Bits x Int256
//*============================================================================*
final class NBKDoubleWidthTestsOnBitsAsInt256: XCTestCase {
typealias T = Int256
typealias M = UInt256
//=------------------------------------------------------------------------=
// MARK: Tests
//=------------------------------------------------------------------------=
func testInitBit() {
XCTAssertEqual(T(bit: false), T( ))
XCTAssertEqual(T(bit: true ), T(1))
}
func testInitRepeatingBit() {
XCTAssertEqual(T(repeating: false), T( ))
XCTAssertEqual(T(repeating: true ), ~T( ))
}
func testBitWidth() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).bitWidth, 64 * 4)
XCTAssertEqual(T(x64: X64(~0, ~0, ~0, ~0)).bitWidth, 64 * 4)
}
func testNonzeroBitCount() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).nonzeroBitCount, 0)
XCTAssertEqual(T(x64: X64( 1, 1, 1, 1)).nonzeroBitCount, 4)
}
func testLeadingZeroBitCount() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).leadingZeroBitCount, 64 * 4)
XCTAssertEqual(T(x64: X64(~0, ~0, ~0, ~0)).leadingZeroBitCount, 64 * 0)
XCTAssertEqual(T(x64: X64( 2, 0, 0, 0)).leadingZeroBitCount, 64 * 4 - 2)
XCTAssertEqual(T(x64: X64( 0, 2, 0, 0)).leadingZeroBitCount, 64 * 3 - 2)
XCTAssertEqual(T(x64: X64( 0, 0, 2, 0)).leadingZeroBitCount, 64 * 2 - 2)
XCTAssertEqual(T(x64: X64( 0, 0, 0, 2)).leadingZeroBitCount, 64 * 1 - 2)
}
func testTrailingZeroBitCount() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).trailingZeroBitCount, 64 * 4)
XCTAssertEqual(T(x64: X64(~0, ~0, ~0, ~0)).trailingZeroBitCount, 64 * 0)
XCTAssertEqual(T(x64: X64( 2, 0, 0, 0)).trailingZeroBitCount, 64 * 0 + 1)
XCTAssertEqual(T(x64: X64( 0, 2, 0, 0)).trailingZeroBitCount, 64 * 1 + 1)
XCTAssertEqual(T(x64: X64( 0, 0, 2, 0)).trailingZeroBitCount, 64 * 2 + 1)
XCTAssertEqual(T(x64: X64( 0, 0, 0, 2)).trailingZeroBitCount, 64 * 3 + 1)
}
func testMostSignificantBit() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).mostSignificantBit, false)
XCTAssertEqual(T(x64: X64(~0, ~0, ~0, ~0)).mostSignificantBit, true )
XCTAssertEqual(T(x64: X64(~0, 0, 0, 0)).mostSignificantBit, false)
XCTAssertEqual(T(x64: X64( 0, ~0, 0, 0)).mostSignificantBit, false)
XCTAssertEqual(T(x64: X64( 0, 0, ~0, 0)).mostSignificantBit, false)
XCTAssertEqual(T(x64: X64( 0, 0, 0, ~0)).mostSignificantBit, true )
}
func testLeastSignificantBit() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).leastSignificantBit, false)
XCTAssertEqual(T(x64: X64(~0, ~0, ~0, ~0)).leastSignificantBit, true )
XCTAssertEqual(T(x64: X64(~0, 0, 0, 0)).leastSignificantBit, true )
XCTAssertEqual(T(x64: X64( 0, ~0, 0, 0)).leastSignificantBit, false)
XCTAssertEqual(T(x64: X64( 0, 0, ~0, 0)).leastSignificantBit, false)
XCTAssertEqual(T(x64: X64( 0, 0, 0, ~0)).leastSignificantBit, false)
}
}
//*============================================================================*
// MARK: * NBK x Double Width x Bits x UInt256
//*============================================================================*
final class NBKDoubleWidthTestsOnBitsAsUInt256: XCTestCase {
typealias T = UInt256
typealias M = UInt256
//=------------------------------------------------------------------------=
// MARK: Tests
//=------------------------------------------------------------------------=
func testInitBit() {
XCTAssertEqual(T(bit: false), T( ))
XCTAssertEqual(T(bit: true ), T(1))
}
func testInitRepeatingBit() {
XCTAssertEqual(T(repeating: false), T( ))
XCTAssertEqual(T(repeating: true ), ~T( ))
}
func testBitWidth() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).bitWidth, 64 * 4)
XCTAssertEqual(T(x64: X64(~0, ~0, ~0, ~0)).bitWidth, 64 * 4)
}
func testNonzeroBitCount() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).nonzeroBitCount, 0)
XCTAssertEqual(T(x64: X64( 1, 1, 1, 1)).nonzeroBitCount, 4)
}
func testLeadingZeroBitCount() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).leadingZeroBitCount, 64 * 4)
XCTAssertEqual(T(x64: X64(~0, ~0, ~0, ~0)).leadingZeroBitCount, 64 * 0)
XCTAssertEqual(T(x64: X64( 2, 0, 0, 0)).leadingZeroBitCount, 64 * 4 - 2)
XCTAssertEqual(T(x64: X64( 0, 2, 0, 0)).leadingZeroBitCount, 64 * 3 - 2)
XCTAssertEqual(T(x64: X64( 0, 0, 2, 0)).leadingZeroBitCount, 64 * 2 - 2)
XCTAssertEqual(T(x64: X64( 0, 0, 0, 2)).leadingZeroBitCount, 64 * 1 - 2)
}
func testTrailingZeroBitCount() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).leadingZeroBitCount, 64 * 4)
XCTAssertEqual(T(x64: X64(~0, ~0, ~0, ~0)).leadingZeroBitCount, 64 * 0)
XCTAssertEqual(T(x64: X64( 2, 0, 0, 0)).trailingZeroBitCount, 64 * 0 + 1)
XCTAssertEqual(T(x64: X64( 0, 2, 0, 0)).trailingZeroBitCount, 64 * 1 + 1)
XCTAssertEqual(T(x64: X64( 0, 0, 2, 0)).trailingZeroBitCount, 64 * 2 + 1)
XCTAssertEqual(T(x64: X64( 0, 0, 0, 2)).trailingZeroBitCount, 64 * 3 + 1)
}
func testMostSignificantBit() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).mostSignificantBit, false)
XCTAssertEqual(T(x64: X64(~0, ~0, ~0, ~0)).mostSignificantBit, true )
XCTAssertEqual(T(x64: X64(~0, 0, 0, 0)).mostSignificantBit, false)
XCTAssertEqual(T(x64: X64( 0, ~0, 0, 0)).mostSignificantBit, false)
XCTAssertEqual(T(x64: X64( 0, 0, ~0, 0)).mostSignificantBit, false)
XCTAssertEqual(T(x64: X64( 0, 0, 0, ~0)).mostSignificantBit, true )
}
func testLeastSignificantBit() {
XCTAssertEqual(T(x64: X64( 0, 0, 0, 0)).leastSignificantBit, false)
XCTAssertEqual(T(x64: X64(~0, ~0, ~0, ~0)).leastSignificantBit, true )
XCTAssertEqual(T(x64: X64(~0, 0, 0, 0)).leastSignificantBit, true )
XCTAssertEqual(T(x64: X64( 0, ~0, 0, 0)).leastSignificantBit, false)
XCTAssertEqual(T(x64: X64( 0, 0, ~0, 0)).leastSignificantBit, false)
XCTAssertEqual(T(x64: X64( 0, 0, 0, ~0)).leastSignificantBit, false)
}
}