Rational Developer for System z
Enterprise PL/I for z/OS, Version 3.8, Programming Guide

TUNE

The TUNE option specifies the architecture for which the executable program will be optimized. This option allows the optimizer to take advantage of architectural differences such as scheduling of instructions.

Read syntax diagramSkip visual syntax diagram            .-5-.
>>-TUNE--(--+-n-+--)-------------------------------------------><
 
Note:
If TUNE level is lower than ARCH, TUNE is forced to ARCH.

The current values that may be specified for the TUNE level are:

5
Generates code that is executable on all models but is optimized for the models specified under ARCH(5).
6
Generates code that is executable on all models but is optimized for the models specified under ARCH(6).
7
Generates code that is executable on all models but is optimized for the models specified under ARCH(7).
8
Generates code that is executable on all models but is optimized for the models specified under ARCH(8).

If you specify a TUNE value less than 5, the compiler will reset it to 5.


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