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csvmul

Multiply a complex scalar and a complex vector.

The function interface declaration is as follows:

Operations on numbers of the float type:

void (vsip_csvmul_f)(vsip_cscalar_f alpha, const vsip_cvview_f *b, const vsip_cvview_f *r);

Parameters

Parameter

Description

Value Range

Input/Output

alpha

Complex scalar to be operated

Unlimited

Input

b

Pointer to the source complex vector

The value cannot be NULL.

Input

r

Pointer to the destination complex 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 CsvmulExample()
{
    vsip_cscalar_f alpha = {1.4f, -0.2f};
    float src[BUFFER_SIZE_T] = {-0.23f, 3.15f, -7.11f, 5.94f, 4.38f, 6.51f, -7.28f, -3.27f, 1.08f, 3.28f};
    float dst[BUFFER_SIZE_T];
    int64_t stride = 1;
    int64_t cvLen = BUFFER_SIZE_T / 2;
    uint64_t offset = 0;

    vsip_cblock_f *block_b = vsip_cblockbind_f(src, NULL, cvLen, VSIP_MEM_NONE);
    vsip_cblock_f *block_r = vsip_cblockbind_f(dst, NULL, cvLen, VSIP_MEM_NONE);

    vsip_cvview_f *b = vsip_cvbind_f(block_b, offset, stride, cvLen);
    vsip_cblockadmit_f(block_b, VSIP_TRUE);
    vsip_cvview_f *r = vsip_cvbind_f(block_r, offset, stride, cvLen);
    vsip_cblockadmit_f(block_r, VSIP_TRUE);

    vsip_csvmul_f(alpha, b, r);

    vsip_cvalldestroy_f(b);
    vsip_cvalldestroy_f(r);

    printf("alpha: %.4f %.4f\n", alpha.r, alpha.i);
    printf("src2:\n");
    for (int32_t i = 0; i < cvLen; ++i) {
        printf("%.4f ", src[i * 2]);
        printf("%.4f    ", src[i * 2 + 1]);
    }
    printf("\ndst:\n");
    for (int32_t i = 0; i < cvLen; ++i) {
        printf("%.4f ", dst[i * 2]);
        printf("%.4f    ", dst[i * 2 + 1]);
    }
    printf("\n");
}

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

Output:

alpha: 1.4000 -0.2000
src2:
-0.2300 3.1500    -7.1100 5.9400    4.3800 6.5100    -7.2800 -3.2700    1.0800 3.2800
dst:
0.3080 4.4560    -8.7660 9.7380    7.4340 8.2380    -10.8460 -3.1220    2.1680 4.3760