Developer Reference for Intel® oneAPI Math Kernel Library for C

ID 766684
Date 3/22/2024
Public

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?lasrt

Sorts numbers in increasing or decreasing order.

Syntax

lapack_int LAPACKE_slasrt (char id , lapack_int n , float * d );

lapack_int LAPACKE_dlasrt (char id , lapack_int n , double * d );

Include Files

  • mkl.h

Description

The routine ?lasrt sorts the numbers in d in increasing order (if id = 'I') or in decreasing order (if id = 'D'). It uses Quick Sort, reverting to Insertion Sort on arrays of size ≤ 20. Dimension of stack limits n to about 232.

Input Parameters

A <datatype> placeholder, if present, is used for the C interface data types in the C interface section above. See C Interface Conventions for the C interface principal conventions and type definitions.

id

= 'I': sort d in increasing order;

= 'D': sort d in decreasing order.

n

The length of the array d.

d

On entry, the array to be sorted.

Output Parameters

d

On exit, d has been sorted into increasing order

(d[0]≤d[1]≤ ... ≤ d[n-1]) or into decreasing order

(d[0] d[1] ... d[n-1]), depending on id.

Return Values

This function returns a value info.

If info = 0, the execution is successful.

If info < 0, the i-th parameter had an illegal value.