Only one of Operation-Code extenders D, T, and Z can be specified for one operation.
20
Cause . . . . . : Once Operation-Code extender D, T, or Z has been specified for an operation code, no other D, T, or Z extender may be specified. The second Operation-Code extender specified is ignored.
Recovery . . . : Remove the extra Operation-Code extender D, T, or Z. Compile again.
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