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ScriptIntrinsicBLAS.SSPMV Method

  • Reference

Definition

Namespace:
Android.Renderscripts
Assembly:
Mono.Android.dll

SSPMV performs the matrix-vector operation y := alphaAx + beta*y

[Android.Runtime.Register("SSPMV", "(IFLandroid/renderscript/Allocation;Landroid/renderscript/Allocation;IFLandroid/renderscript/Allocation;I)V", "", ApiSince=23)]
public void SSPMV (int Uplo, float alpha, Android.Renderscripts.Allocation? Ap, Android.Renderscripts.Allocation? X, int incX, float beta, Android.Renderscripts.Allocation? Y, int incY);
[<Android.Runtime.Register("SSPMV", "(IFLandroid/renderscript/Allocation;Landroid/renderscript/Allocation;IFLandroid/renderscript/Allocation;I)V", "", ApiSince=23)>]
member this.SSPMV : int * single * Android.Renderscripts.Allocation * Android.Renderscripts.Allocation * int * single * Android.Renderscripts.Allocation * int -> unit

Parameters

Uplo
Int32

Specifies whether the upper or lower triangular part of the matrix A is supplied in packed form.

alpha
Single

The scalar alpha.

Ap
Allocation

The input allocation contains matrix A, supported elements type Element#F32.

X
Allocation

The input allocation contains vector x, supported elements type Element#F32.

incX
Int32

The increment for the elements of vector x, must be larger than zero.

beta
Single

The scalar beta.

Y
Allocation

The input allocation contains vector y, supported elements type Element#F32.

incY
Int32

The increment for the elements of vector y, must be larger than zero.

Attributes
RegisterAttribute

Remarks

SSPMV performs the matrix-vector operation y := alpha*A*x + beta*y

Details: http://www.netlib.org/lapack/explore-html/d8/d68/sspmv_8f.html

Note: For a N*N matrix, the input Allocation should be a 1D allocation of size dimX = N*(N+1)/2, The following subroutine can is an example showing how to convert a UPPER trianglar matrix 'a' to packed matrix 'b'. k = 0 for i in range(0, n): for j in range(i, n): b[k++] = a[i, j]

Java documentation for android.renderscript.ScriptIntrinsicBLAS.SSPMV(int, float, android.renderscript.Allocation, android.renderscript.Allocation, int, float, android.renderscript.Allocation, int).

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Applies to