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feat: add binary encoding for unboxed types #13

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Merged
tmcdonell merged 7 commits into from
Jan 14, 2026
Merged

feat: add binary encoding for unboxed types #13

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b77bbb6
fix: restrict SIMD extension to types where Scalar is also Generic
tmcdonell Dec 21, 2025
944c023
fix: restrict ArrayData to only fixed-sized types
tmcdonell Dec 21, 2025
12adcc9
feat: initialise padding regions between chunks
tmcdonell Dec 18, 2025
0603c8d
feat: add binary encoding (memory dump) for unboxed types
tmcdonell Dec 19, 2025
6cb9008
test: add binary encoding tests
tmcdonell Dec 19, 2025
efa5da5
test: add missing Codable tests
tmcdonell Dec 19, 2025
31455da
test: ensure we have a type with some internal padding
tmcdonell Dec 19, 2025
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2 changes: 1 addition & 1 deletion Benchmarks/Benchmarks/Benchmarks.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -160,7 +160,7 @@ struct Zone: Randomizable & Generic {

@inlinable
init(from rep: RawRepresentation) {
self.id = rep._0
self.id = Int(from: rep._0)
self.position = Vec3<Float>(from: rep._1)
}
}
23 changes: 14 additions & 9 deletions Sources/MultiArray/ArrayData.swift
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Expand Up @@ -69,14 +69,12 @@ extension ArrayData where Buffer == UnsafeMutablePointer<Self> {
}

// Primal types
extension Int: ArrayData {}
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extension Int8: ArrayData {}
extension Int16: ArrayData {}
extension Int32: ArrayData {}
extension Int64: ArrayData {}
@available(macOS 15.0, iOS 18.0, tvOS 18.0, watchOS 11.0, *)
extension Int128: ArrayData {}
extension UInt: ArrayData {}
extension UInt8: ArrayData {}
extension UInt16: ArrayData {}
extension UInt32: ArrayData {}
Expand All @@ -90,13 +88,13 @@ extension Float16: ArrayData {}
extension Float32: ArrayData {}
extension Float64: ArrayData {}

extension SIMD2: ArrayData {}
extension SIMD3: ArrayData {}
extension SIMD4: ArrayData {}
extension SIMD8: ArrayData {}
extension SIMD16: ArrayData {}
extension SIMD32: ArrayData {}
extension SIMD64: ArrayData {}
extension SIMD2: ArrayData where Scalar: Generic, Scalar.RawRepresentation: ArrayData {}
extension SIMD3: ArrayData where Scalar: Generic, Scalar.RawRepresentation: ArrayData {}
extension SIMD4: ArrayData where Scalar: Generic, Scalar.RawRepresentation: ArrayData {}
extension SIMD8: ArrayData where Scalar: Generic, Scalar.RawRepresentation: ArrayData {}
extension SIMD16: ArrayData where Scalar: Generic, Scalar.RawRepresentation: ArrayData {}
extension SIMD32: ArrayData where Scalar: Generic, Scalar.RawRepresentation: ArrayData {}
extension SIMD64: ArrayData where Scalar: Generic, Scalar.RawRepresentation: ArrayData {}

public extension FixedWidthInteger {
typealias Buffer = UnsafeMutablePointer<Self>
Expand Down Expand Up @@ -269,6 +267,13 @@ internal func getRawSize<T>(for _: T.Type, count: Int, from offset: Int) -> Int
internal func reserveCapacity<T>(for type: T.Type, count: Int, from context: inout UnsafeMutableRawPointer) -> UnsafeMutablePointer<T> {
let begin = context.alignedUp(for: type)
let end = begin + count * MemoryLayout<T>.stride
let pad = begin - context

// Initialise any gaps between the struct-of-array chunks
if pad > 0 {
context.initializeMemory(as: UInt8.self, repeating: 0x00, count: pad)
}

context = end
return begin.bindMemory(to: type, capacity: count)
}
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