| DclIntervalLT (IBLKLT) | Get i that fills bounds (i-1)
value | 
| DclIntervalLE (IBLKLE) | Get i that fills bounds (i-1) | 
| DclIntervalGT (IBLKGT) | Get i that fills bounds (i) | 
| DclIntervalGE (IBLKGE) | Get i that fills bounds (i)
value | 
*The corresponding f77 interface name in parentheses.