A simple application is provided as part of the associated code suite, as main.c. This carries out three floating-point operations, the first two of which are executed by the VFP hardware, the third uses a denormalized number and therefore bounces to the VFP Support Code for handling (except if RunFast mode is enabled). This provides a simple test that the VFP support code has been successfully integrated into a system.

#include <stdio.h>

double VFPtest(double x, double y)
{
    return x + y;
}

int main(void)
{
    double val1 = 1.0;
    double val2 = 2.0;
    double val3 = 2.22524e-308; //Small, just normalized number
    double val4 = 3.1234e-322; // denormalized number
    double res1;
    double res2;
    double res3;
    printf("VFP Support Code Test\n");
    printf("=====================\n\n");
    printf("Non-bouncing calculation of %f + %f\n",val1,val2);
    printf("The result should be : 3.000000\n");
    res1=VFPtest(val1,val2);
    printf("The result is        : %f\n\n", res1);
    printf("Non-bouncing calculation of %e + %e\n",val3,val3);
    printf("The result should be : 4.45048e-308\n");
    res2=VFPtest(val3,val3);
    printf("The result is        : %e\n\n", res2);
    printf("Bouncing calculation of %e + %e\n", val4, val4);
    printf("The result should be : 6.225227e-322\n");
    res3=VFPtest(val4,val4);
    printf("The result is        : %e\n\n", res3);
    return 0;
}

Details of how to build and run this code can be found in the readme.txt of the associated example code.