gtps1m0pSystem Macros

$GSVAC-Convert EVM Address to SVM Address

Use this system macro to convert a valid address in the entry control block (ECB) virtual memory (EVM) into the corresponding address in the system virtual memory (SVM).

Format




ADDRESS=Rw
This parameter specifies the general register that contains the 31-bit EVM address, in the EVM of the ECB pointed to by R9, to be converted. On return, it contains the corresponding SVM address.

ERROR=label
This parameter specifies a label identifying the error routine receiving control if an error condition is raised. An error will occur when the EVM address specified in the ADDRESS parameter is invalid.

INLINE
This parameter specifies whether inline code or a call to the service routine is generated.

NO
Linkage to the service routine is generated.

YES
The conversion code is generated inline.

The default is NO. NO should be coded for all call invocations.

SAVREG
The specified volatile registers will be saved by the macro in the stack area or in the registers specified by the WKREG parameter. Up to 3 registers can be specified. Those registers are R0, R1, R2. If this keyword is omitted, none of the 3 registers will be saved. You should not save a volatile register if you expect it to contain an output parameter. The register will be overwritten with its original contents, since the reload is the last thing performed by the macro.

WKREG
The specified symbolic register names are free to be used by the macro to save the volatile registers coded on the SAVREG parameter. Up to 3 registers can be specified, but the standard linkage registers R13 through R2 cannot be used here. This parameter is used in conjunction with the SAVREG parameter to generate efficient code and enhance the performance of the macro. The number of registers specified by WKREG should be less than or equal to the number of registers specified by SAVREG. If this parameter is omitted or not used to its maximum capacity, code optimization is sacrificed.

Entry Requirements

Return Conditions

Programming Considerations

Examples

None.