use vector functions (SVE) from armpl with gcc

I wrote a test program to call vector function from armpl directly.  However element 4 - 7 doesn't look right to me.  Is there anything wrong with the program?

Regards,

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <arm_sve.h>
#include <armpl.h>

svfloat32_t _ZGVsMxv_expf(svfloat32_t a, svbool_t pg);

int main()
{
    int width  = 16;

    float* src_data = (float *)malloc((width) * sizeof(float));
    float* dst_data = (float *)malloc((width) * sizeof(float));

    // Fill src_data with small values [-100, 100]
    float min = -10.f;
    float max = 10.f;
    for(int w = 0; w < width; w++)
    {
        double r = (double)random()/RAND_MAX;
        src_data[w] = min + (max - min) * r;
    }

    float *src, *dst;

    // SVE
    svbool_t pred;
    svfloat32_t sva, svc;
    int i = 0;
    src = src_data;
    dst = dst_data;
    for(int w = 0; w < width; w+=svcntw())
    {
        pred = svwhilelt_b32(w, width);
        sva = svld1(pred, src+w);
        svc = _ZGVsMxv_expf(sva, pred);
        svst1(pred, dst+w, svc);
    }

    for(int w = 0; w < width; w++)
    {
        printf("%d %f %f %f\n", w, src_data[w], expf(src_data[w]), dst_data[w]);
    }

    return 0;
}

compile -

gcc-10.2 -O3 -march=armv8.4-a+sve -o test_sve test_expf_sve.c -lamath -lm

result -

0 6.803754 901.224426 901.224365
1 -2.112341 0.120954 0.120954
2 5.661984 287.719025 287.718994
3 5.968801 391.036346 391.036377
4 8.232947 3762.907959 1.000000
5 -6.048973 0.002360 1.000000
6 -3.295545 0.037048 1.000000
7 5.364592 213.704041 1.000000
8 -4.444506 0.011743 0.011743
9 1.079399 2.942911 2.942911
10 -0.452059 0.636317 0.636317
11 2.577419 13.163115 13.163114
12 -2.704311 0.066916 0.066916
13 0.268018 1.307371 1.307371
14 9.044595 8472.617188 8472.617188
15 8.323901 4121.206055 4121.206055