Clears all the context flags.
Clears all the traps.
Gets the value of the specified context flag.
Returns a snapshot of the context flags.
Returns the value of the specified trap.
Returns a snapshot of traps.
Sets or resets the specified context flag(s).
Sets or resets the specified trap(s).
"The exceptional conditions are grouped into signals, which can be controlled individually. The context contains a flag (which is either 0 or 1) and a trap-enabler (which also is either 0 or 1) for each signal. For each of the signals, the corresponding flag is set to 1 when the signal occurs. It is only reset to 0 by explicit user action." General Decimal Arithmetic Specification, p. 15.