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vneg

Calculate the negative value of a real-number vector.

The function interface declaration is as follows:

Operations on numbers of the float type:

void (vsip_vneg_f)(const vsip_vview_f *a, const vsip_vview_f *r);

Parameters

Parameter

Description

Value Range

Input/Output

a

Pointer to the source vector

The value cannot be NULL.

Input

r

Pointer to the destination vector

The value cannot be NULL.

Output

Abnormal Input

When a null pointer is input, the function directly returns a result.

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 VnegExample()
{
    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};
    float dst[BUFFER_SIZE_T];
    int64_t stride = 1;
    uint64_t offset = 0;

    vsip_block_f *block_a = vsip_blockbind_f(src, BUFFER_SIZE_T, VSIP_MEM_NONE);
    vsip_block_f *block_r = vsip_blockbind_f(dst, 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);
    vsip_vview_f *r = vsip_vbind_f(block_r, offset, stride, BUFFER_SIZE_T);
    vsip_blockadmit_f(block_r, VSIP_TRUE);

    vsip_vneg_f(a, r);

    vsip_valldestroy_f(a);
    vsip_valldestroy_f(r);

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

int main(void) {
    VnegExample();
    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:
-1.64 -1.63 1.09 -0.71 3.20 0.43 -0.41 4.83 -5.36 4.40