Converts a single-precision floating-point vector to a double-precision floating-point vector or converts a double-precision floating-point vector to a single-precision floating-point vector.
d=vec_cvf(a)
The following table describes the types of the returned value and the function arguments.
| d | a |
|---|---|
| vector float | vector double |
| vector double | vector float |
When this function converts from vector float to vector double, it converts the types of elements 0 and 2 in the vector.
When this function converts from vector double to vector float, the types of element 1 and 3 in the result vector are undefined.