This is equivalent to reinterpreting `UI` as a bf16 and converting to 64-bit float, writing to `FRT`.
Example:
+
```
# clearing a FPR
fmvis f4, 0 # writes +0.0 to f4
<div id="fpr-to-gpr-conversion-mode" />
Mode values:
+
| Mode | `rounding_mode` | Semantics |
|------|-----------------|----------------------------------|
| 000 | from `FPSCR` | [OpenPower semantics] |
# FP to Integer Conversion Pseudo-code
Key for pseudo-code:
+
| term | result type | definition |
|---------------------------|-------------|----------------------------------------------------------------------------------------------------|
| `fp` | -- | `f32` or `f64` (or other types from SimpleV) |