svmul

Multiply a real-number scalar and a real-number vector.

The function interface declaration is as follows:

Operations on numbers of the float type:

void (vsip_svmul_f)(float alpha, const vsip_vview_f *b, const vsip_vview_f *r);

Parameters

Parameter	Description	Value Range	Input/Output
alpha	Scalar to be operated	Unlimited	Input
b	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 SvmulExample()
{
    float alpha = 1.4f;
    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_b = 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 *b = vsip_vbind_f(block_b, offset, stride, BUFFER_SIZE_T);
    vsip_blockadmit_f(block_b, VSIP_TRUE);
    vsip_vview_f *r = vsip_vbind_f(block_r, offset, stride, BUFFER_SIZE_T);
    vsip_blockadmit_f(block_r, VSIP_TRUE);

    vsip_svmul_f(alpha, b, r);

    vsip_valldestroy_f(b);
    vsip_valldestroy_f(r);

    printf("alpha: %.4f\nsrc:\n", alpha);
    for (int32_t i = 0; i < BUFFER_SIZE_T; ++i) {
        printf("%.4f ", src[i]);
    }
    printf("\ndst:\n");
    for (int32_t i = 0; i < BUFFER_SIZE_T; ++i) {
        printf("%.4f ", dst[i]);
    }
    printf("\n");
}

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

Output:

alpha: 1.4000
src:
1.6400 1.6300 -1.0900 0.7100 -3.2000 -0.4300 0.4100 -4.8300 5.3600 -4.4000
dst:
2.2960 2.2820 -1.5260 0.9940 -4.4800 -0.6020 0.5740 -6.7620 7.5040 -6.1600

Parent topic: Vector Operation Functions