Add vDSP_vdpsp

Author: ptoffy

README.md

@@ -77,4 +77,4 @@ The package is structured as follows:
     - `Statistical` - Statistical operations:
         - [x] `vDSP.mean` - Mean of a vector
     - `Transforms`:
-        - [ ] `vDSP_vdpsp` - Convert a double vector to a single precision vector
+        - [x] `vDSP_vdpsp` - Convert a double vector to a single precision vector

Sources/AccelerateLinux/VectorOps/VectorTransformOps.swift

@@ -0,0 +1,25 @@
+#if canImport(Accelerate)
+@_exported import Accelerate
+#else
+
+/// Converts a double-precision vector to a single-precision vector.
+/// - Parameters:
+///   - __A: The input vector.
+///   - __IA: The distance between the elements in the input vector.
+///   - __C: The output vector.
+///   - __IC: The distance between the elements in the output vector.
+///   - __N: The number of elements that the function processes.
+public func vDSP_vdpsp(
+    _ __A: UnsafePointer<Double>,
+    _ __IA: vDSP_Stride,
+    _ __C: UnsafeMutablePointer<Float>,
+    _ __IC: vDSP_Stride,
+    _ __N: vDSP_Length
+) {
+    var i = 0
+    while i < __N {
+        __C[i * __IC] = Float(__A[i * __IA])
+        i += 1
+    }
+}
+#endif