vma

Perform multiply-add operations on real-number vectors.

The function interface declaration is as follows:

Operations on numbers of the float type:

void (vsip_vma_f)(const vsip_vview_f *a, const vsip_vview_f *b, const vsip_vview_f *c, const vsip_vview_f *r);

Parameters

Parameter	Description	Value Range	Input/Output
a	Pointer to the source vector	The value cannot be NULL.	Input
b	Pointer to the source vector	The value cannot be NULL.	Input
c	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 VmaExample()
{
    float src1[BUFFER_SIZE_T] = {1.64f, 1.63f, -1.09f, 0.71f, -3.20f, -0.43f, 0.41f, -4.83f, 5.36f, -4.40f};
    float src2[BUFFER_SIZE_T] = {-0.23f, 3.15f, -7.11f, 5.94f, 4.38f, 6.51f, -7.28f, -3.27f, 1.08f, 3.28f};
    float src3[BUFFER_SIZE_T] = {0.1f, 2.2f, -1.31f, 4.23f, 0.38f, 1.31f, -2.57f, -5.13f, 0.03f, 1.94f};
    float dst[BUFFER_SIZE_T];
    int64_t stride = 1;
    uint64_t offset = 0;

    vsip_block_f *block_a = vsip_blockbind_f(src1, BUFFER_SIZE_T, VSIP_MEM_NONE);
    vsip_block_f *block_b = vsip_blockbind_f(src2, BUFFER_SIZE_T, VSIP_MEM_NONE);
    vsip_block_f *block_c = vsip_blockbind_f(src3, 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 *b = vsip_vbind_f(block_b, offset, stride, BUFFER_SIZE_T);
    vsip_blockadmit_f(block_a, VSIP_TRUE);
    vsip_vview_f *c = vsip_vbind_f(block_c, 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_vma_f(a, b, c, r);

    vsip_valldestroy_f(a);
    vsip_valldestroy_f(b);
    vsip_valldestroy_f(c);
    vsip_valldestroy_f(r);

    printf("src1:\n");
    for (int32_t i = 0; i < BUFFER_SIZE_T; ++i) {
        printf("%.4f ", src1[i]);
    }
    printf("\nsrc2:\n");
    for (int32_t i = 0; i < BUFFER_SIZE_T; ++i) {
        printf("%.4f ", src2[i]);
    }
    printf("\nsrc3:\n");
    for (int32_t i = 0; i < BUFFER_SIZE_T; ++i) {
        printf("%.4f ", src3[i]);
    }
    printf("\ndst:\n");
    for (int32_t i = 0; i < BUFFER_SIZE_T; ++i) {
        printf("%.4f ", dst[i]);
    }
    printf("\n");
}

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

Output:

src1:
1.6400 1.6300 -1.0900 0.7100 -3.2000 -0.4300 0.4100 -4.8300 5.3600 -4.4000
src2:
-0.2300 3.1500 -7.1100 5.9400 4.3800 6.5100 -7.2800 -3.2700 1.0800 3.2800
src3:
0.1000 2.2000 -1.3100 4.2300 0.3800 1.3100 -2.5700 -5.1300 0.0300 1.9400
dst:
-0.2772 7.3345 6.4399 8.4474 -13.6360 -1.4893 -5.5548 10.6641 5.8188 -12.4920

Parent topic: Vector Operation Functions