IEEE Trapping Modes and Their Qualifiers.
| Mode | Qualifier |
| Imprecise, underflow disabled, inexact disabled | None |
| Imprecise, underflow enabled, inexact disabled | u |
| Software, underflow enabled, inexact disabled | su |
| Software, underflow enabled, inexact enabled | sui |
IEEE Convert-to-Integer Trapping Modes
| Mode | Qualifier |
| Imprecise, integer overflow disabled, inexact disabled | None |
| Imprecise, integer overflow enabled, inexact disabled | v |
| Software, integer overflow enabled, inexact disabled | sv |
| Software, integer overflow enabled, inexact enabled | svi |