Domain of an ordinary USING instruction
The domain of an ordinary USING instruction (called the
ordinary USING domain, or the
USING domain) begins where the USING instruction appears in a source module. It continues until the end of a source module, except when:
- A subsequent DROP instruction specifies the same base register or registers assigned by a preceding USING instruction.
- A subsequent USING instruction specifies the same register or registers assigned by a preceding USING instruction.
- The address reference appears in the domain of a USING instruction.
- The addresses referred to lie within the range of some USING instruction.
The assembler does not convert implicit address references that are outside the USING domain. The USING domain depends on the position of the USING instruction in the source module after conditional assembly, if any, has been done.