Shift Operators
Definition
The Shift Operators are defined for any one-dimensional arrays with elements of type BIT or BOOLEAN .
The operators are defined as follows, where L is the left operand and R the right operand:
- L sll R : Shift L logically left (R≥0) respective right (R<0) by R index positions. The foremost (R≥0) respective the last (R<0) elements drop out and T'LEFT is inserted. T is the type of the elements of the array.
- L srl R : Shift L logically right (R≥0) respective left (R<0) by R index positions. The last (R≥0) respective the foremost (R<0) elements drop out and T'LEFT is inserted. T is the type of the elements of the array.
- L sla R : Shift L arithmetically left (R≥0) respective right (R<0) by R index positions. The foremost (R≥0) respective the last (R<0) elements drop out and L'RIGHT (R≥0) respective L'LEFT (R<0) is inserted. It is the last (R≥0) respective the foremost (R<0) value of L is inserted.
- L sra R : Shift L arithmetically right (R≥0) respective left (R<0) by R index positions. The last (R≥0) respective the foremost (R<0) elements drop out and L'LEFT (R≥0) respective L'RIGHT (R<0) is inserted. It is the foremost (R≥0) respective the last (R<0) value of L is inserted.
- L rol R : Rotate L logically left (R≥0) respective right (R<0) by R index positions. The foremost (R≥0) respective the last (R<0) values are inserted in the front (R≥0) respective behind (R<0).
- L ror R : Rotate L logically right (R≥0) respective left (R<0) by R index positions. The last (R≥0) respective the foremost (R<0) values are inserted behind (R≥0) respective in the front (R<0).
Overview
| Operator | Operation | Type of the left operand | Type of the right operand | result type |
|---|---|---|---|---|
| sll | Shift Left Logical | Any one-dimensional array type with elements of the type BIT or BOOLEAN | INTEGER | Type of the left operand |
| srl | Shift Right Logical | Any one-dimensional array type with elements of the type BIT or BOOLEAN | INTEGER | Type of the left operand |
| sla | Shift Left Arithmetic | Any one-dimensional array type with elements of the type BIT or BOOLEAN | INTEGER | Type of the left operand |
| sra | Shift Right Arithmetic | Any one-dimensional array type with elements of the type BIT or BOOLEAN | INTEGER | Type of the left operand |
| rol | Rotate Left Logical | Any one-dimensional array type with elements of the type BIT or BOOLEAN | INTEGER | Type of the left operand |
| ror | Rotate Right Logical | Any one-dimensional array type with elements of the type BIT or BOOLEAN | INTEGER | Type of the left operand |