vget

Get the value of a specific index of a real-number vector.

The function interface declaration is as follows:

Operations on numbers of the float type:

float (vsip_vget_f)(const vsip_vview_f *v, uint64_t i);

Parameters

Parameter	Description	Value Range	Input/Output
v	Pointer to the source vector	The value cannot be NULL.	Input
i	Index variable	Greater than or equal to 0 and less than the vector size	Output

Abnormal Input

When a null pointer is input or the index is out of bound, the function directly returns a NaN value.

Example

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include "kvsip.h"
#include "vsip.h"
#include "vsip_type.h"

#define BUFFER_SIZE_T 10
void VgetExample()
{
    float src[BUFFER_SIZE_T] = {1.64f, 1.63f, -1.09f, 0.71f, -3.20f, -0.43f, 0.41f, 4.83f, -5.36f, -4.40f};
    uint64_t j = 5;
    int64_t stride = 1;
    uint64_t offset = 0;

    vsip_block_f *block_a = vsip_blockbind_f(src, BUFFER_SIZE_T, VSIP_MEM_NONE);

    vsip_vview_f *a = vsip_vbind_f(block_a, offset, stride, BUFFER_SIZE_T);
    vsip_blockadmit_f(block_a, VSIP_TRUE);

    float dst = vsip_vget_f(a, j);

    vsip_valldestroy_f(a);

    printf("src:\n");
    for (int32_t i = 0; i < BUFFER_SIZE_T; ++i) {
        printf("%.2f ", src[i]);
    }
    printf("\ndst: %.2f\n", dst);
}

int main(void) {
    VgetExample();
    return 0;
}

Output:

src:
1.64 1.63 -1.09 0.71 -3.20 -0.43 0.41 4.83 -5.36 -4.40
dst: -0.43

Parent topic: Vector Operation Functions