vcsub - Vector complex subtraction x-y

21.3 vcsub - Vector complex subtraction $x-y$

#include <mvec.h> 
 
void vcsub (int n, double complex *restrict z, int incz, const double complex *restrict x, 
            int incx, const double complex *restrict y, int incy); 
void vcsubf(int n, float complex *restrict z, int incz, const float complex *restrict x, 
            int incx, const float complex *restrict y, int incy); 
 
 
#include <mvec64.h> 
 
void vcsub_64 (long n, double complex *restrict z, long incz, const double complex *restrict x, 
               long incx, const double complex *restrict y, long incy); 
void vcsubf_64(long n, float complex *restrict z, long incz, const float complex *restrict x, 
               long incx,  const float complex *restrict y, long incy);

Given input vectors $x$ and $y$ and a result vector $z$ , this function computes

z= x-y

21.3.1 Parameters

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

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