| Op Code (Hex) | Operand 1 | Operand 2 | ||
|---|---|---|---|---|
| 0082 | Receiver | Source |
Operand 2: Numeric variable scalar, character variable scalar, numeric variable array, character variable array, or pointer data object.
Description: A space pointer is returned in operand 1 and is set to address the lowest order (leftmost) byte of the byte string identified by operand 2.
When the addressability is set in a space pointer, the instruction signals the space addressing violation (hex 0601) exception when the offset addresses beyond the largest space allocatable in the object or when the space address to be stored in the pointer has a nonpositive offset value. This offset value is dependent on the size and packaging of the object containing the space and is independent of the actual size of the space allocated. If the exception is signaled for this reason, the pointer is not modified by the instruction. Attempts to use a pointer whose offset value lies between the currently allocated extent of the space and the maximum allocatable extent of the space cause the space addressing violation (hex 0601) exception to be signaled.
If a pointer data object specified for operand 2 contains a data pointer value upon execution of the instruction, the addressability is set to the pointer storage form rather than to the scalar described by the data pointer value. The variable scalar references allowed on operand 2 cannot be described through a data pointer value.
The object destroyed (hex 2202) exception, the parameter reference violation (hex 0801) exception, and the pointer does not exist (hex 2401) exception are not signaled when operand 1 is a space pointer machine object and operand 2 is based on a space pointer machine object. This occurs when the basing space pointer machine object for operand 2 contains an internal machine value that indicates one of these error conditions exists. If the corresponding exception is not signaled, operand 1 is set with an internal machine value that preserves the exception condition which existed for operand 2. The appropriate exception condition is signaled for either pointer upon a subsequent attempt to reference the space data the pointer addresses.
06 Addressing
08 Argument/Parameter
10 Damage Encountered
1C Machine-Dependent
20 Machine Support
22 Object Access
24 Pointer Specification
2E Resource Control Limit
32 Scalar Specification
36 Space Management
44 Protection Violation