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This takes more than 15 minutes to compile and makes the benchmark suite unusable. There are multiple severe compile issues that need to be fixed properly before we can support the DoubleWidth API. See [SR-6947] DoubleWidth compile time.
64 lines
1.9 KiB
Swift
64 lines
1.9 KiB
Swift
//===--- DoubleWidthDivision.swift ----------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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// This test checks performance of division using DoubleWidth.
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// FIXME: This needs to be disabled with an #if because it runs into pathological
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// compile time and code size problems.
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// [SR-6947] DoubleWidth compile time.
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// import Foundation
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import TestsUtils
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public let DoubleWidthDivision = BenchmarkInfo(
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name: "DoubleWidthDivision",
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runFunction: disabled,
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tags: [.validation, .algorithm]
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)
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public func disabled(_ N: Int) {}
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#if false
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private typealias Int128 = DoubleWidth<Int64>
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private typealias Int256 = DoubleWidth<Int128>
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private typealias Int512 = DoubleWidth<Int256>
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private typealias Int1024 = DoubleWidth<Int512>
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@inline(never)
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public func run_DoubleWidthDivision(_ N: Int) {
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var sum = 0
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for _ in 1...5*N {
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let (q, r) =
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(Int128(Int64.max) * 16)
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.quotientAndRemainder(dividingBy: numericCast(getInt(16)))
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sum += Int(q * r)
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let (q1, r1) =
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(40 as Int128).dividingFullWidth(
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(high: numericCast(getInt(0)), low: numericCast(getInt(240))))
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sum += Int(q1 * r1)
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let x =
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DoubleWidth<DoubleWidth<DoubleWidth<Int8>>>(
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Int64.max / numericCast(getInt(4)))
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let y = DoubleWidth<DoubleWidth<Int8>>(Int32.max)
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let (q2, r2) = y.dividingFullWidth((x.high, x.low))
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sum += Int(q2 - r2)
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let xx = Int1024(x)
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let yy = Int512(y)
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let (q3, r3) = yy.dividingFullWidth((xx.high, xx.low))
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sum -= Int(q3 - r3)
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}
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CheckResults(sum == 0)
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}
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#endif
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