spr2 Interface
public interface spr2
SPR2 performs the symmetric rank 2 operation A := alphaxyT + alphayxT + A, where alpha is a scalar, x and y are n element vectors and A is an n by n symmetric matrix, supplied in packed form.
Subroutines
public pure subroutine dspr2(uplo, n, alpha, x, incx, y, incy, ap)
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=1), | intent(in) | :: | uplo | |||
| integer(kind=ilp), | intent(in) | :: | n | |||
| real(kind=dp), | intent(in) | :: | alpha | |||
| real(kind=dp), | intent(in) | :: | x(*) | |||
| integer(kind=ilp), | intent(in) | :: | incx | |||
| real(kind=dp), | intent(in) | :: | y(*) | |||
| integer(kind=ilp), | intent(in) | :: | incy | |||
| real(kind=dp), | intent(inout) | :: | ap(*) |
public pure subroutine sspr2(uplo, n, alpha, x, incx, y, incy, ap)
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=1), | intent(in) | :: | uplo | |||
| integer(kind=ilp), | intent(in) | :: | n | |||
| real(kind=sp), | intent(in) | :: | alpha | |||
| real(kind=sp), | intent(in) | :: | x(*) | |||
| integer(kind=ilp), | intent(in) | :: | incx | |||
| real(kind=sp), | intent(in) | :: | y(*) | |||
| integer(kind=ilp), | intent(in) | :: | incy | |||
| real(kind=sp), | intent(inout) | :: | ap(*) |
Module Procedures
public pure subroutine stdlib_dspr2(uplo, n, alpha, x, incx, y, incy, ap)
DSPR2 performs the symmetric rank 2 operation A := alphaxyT + alphayxT + A, where alpha is a scalar, x and y are n element vectors and A is an n by n symmetric matrix, supplied in packed form.
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=1), | intent(in) | :: | uplo | |||
| integer(kind=ilp), | intent(in) | :: | n | |||
| real(kind=dp), | intent(in) | :: | alpha | |||
| real(kind=dp), | intent(in) | :: | x(*) | |||
| integer(kind=ilp), | intent(in) | :: | incx | |||
| real(kind=dp), | intent(in) | :: | y(*) | |||
| integer(kind=ilp), | intent(in) | :: | incy | |||
| real(kind=dp), | intent(inout) | :: | ap(*) |
public pure subroutine stdlib_sspr2(uplo, n, alpha, x, incx, y, incy, ap)
SSPR2 performs the symmetric rank 2 operation A := alphaxyT + alphayxT + A, where alpha is a scalar, x and y are n element vectors and A is an n by n symmetric matrix, supplied in packed form.
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=1), | intent(in) | :: | uplo | |||
| integer(kind=ilp), | intent(in) | :: | n | |||
| real(kind=sp), | intent(in) | :: | alpha | |||
| real(kind=sp), | intent(in) | :: | x(*) | |||
| integer(kind=ilp), | intent(in) | :: | incx | |||
| real(kind=sp), | intent(in) | :: | y(*) | |||
| integer(kind=ilp), | intent(in) | :: | incy | |||
| real(kind=sp), | intent(inout) | :: | ap(*) |