struct myValues{    // define my structure
int ptr2A;  // pointer to first float
float A;
float B;
float C;
float D;
float E;
float F;
}myValues;

struct myValues my_asm(int ptr2a, float A, float B, float C, float D, float E, float F);  //  Prototype for the ASM function

…code here to set values of A-F...

float* ptr2A = &myValues.A;    //get the memory address where A is stored
myValues.ptr2A = ptr2A;         //put that address into myValues.ptr2A and pass to the ASM function


// now call the ASM code
myValues = my_asm(myValues.ptr2A, myValues.A, myValues.B, myValues.C, myValues.D, myValues.E, myValues.F);

mov r5, r1      //   r1 has pointer to the first float A
vdiv.f32 s3, s0, s0  //this line puts 1.0 in s3 for ease in debugging
vstr s3, [r5]  // poke the 1.0 into the mem location of A
bx lr