Restore partial support for :fast rounding mode
#691
| Job | Run time |
|---|---|
| 1m 30s | |
| 1m 51s | |
| 2m 9s | |
| 2m 14s | |
| 2m 22s | |
| 2m 56s | |
| 1m 53s | |
| 2m 9s | |
| 2m 6s | |
| 2m 43s | |
| 2m 53s | |
| 2m 39s | |
| 2m 52s | |
| 2m 40s | |
| 2m 58s | |
| 3m 18s | |
| 39m 13s |