vcsadd - Vector complex scalar subtraction x+α

21.2 vcsadd - Vector complex scalar subtraction $x +α$

#include <mvec.h> 
 
void vcsadd (int n, double complex *restrict y, int incy, 
             const double complex *restrict x, int incx, double complex a); 
void vcsaddf(int n, float complex *restrict y, int incy, 
             const float complex *restrict x, int incx, float complex a); 
 
void vcsadd_64 (long n, double complex *restrict y, long incy, 
                double complex *restrict x, long incx, double complex a); 
void vcsaddf_64(long n, float complex *restrict y, long incy, 
                float complex *restrict x, long incx, float complex a);

Given an input vector $x$ and a scalar constant $α$ and a result vector $y$ , this function computes:

y= x+ α

21.2.1 Parameters

N - INTEGER: ENTRY: Number of elements of $x$ and $y$ .
CONSTRAINT: $n ≥1$ .
Y - ARRAY OF COMPLEX: EXIT: Result vector $y$ .
CONSTRAINT: Must contain $n× incy$ elements.
CONSTRAINT: Must not overlap with array $x$ .
INCY - INTEGER: ENTRY: Stride for the vector $y$ .
CONSTRAINT: $incy̸= 0$ .
BEHAVIOR: A negative stride will traverse the array in reverse.
X - ARRAY OF COMPLEX: ENTRY: Input vector $x$ .
CONSTRAINT: Must contain $n× incx$ elements.
CONSTRAINT: Must not overlap with array $y$ .
INCX - INTEGER: ENTRY: Stride for the vector $x$ .
CONSTRAINT: $incx̸= 0$ .
BEHAVIOR: A negative stride will traverse the array in reverse.
A - COMPLEX: ENTRY: Scalar constant $α$ .

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