vmaxmgval

Calculate the maximum absolute value of real-number vectors.

The function interface declaration is as follows:

Operations on numbers of the float type:

float (vsip_vmaxmgval_f)(const vsip_vview_f *a, uint64_t *j);

Parameters

Parameter	Description	Value Range	Input/Output
a	Pointer to the source vector	The value cannot be NULL.	Input
j	Pointer to the index variable	The value cannot be NULL.	Output

Abnormal Input

When a null pointer is input, 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 VmaxmgvalExample()
{
    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 = 0;
    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_vmaxmgval_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("\nindex: %lu, dst:%.2f\n", j, dst);
}

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

Output:

src:
1.64 1.63 -1.09 0.71 -3.20 -0.43 0.41 4.83 -5.36 -4.40
index: 8, dst:5.36

Parent topic: Vector Operation Functions