- This expression code is used in only one context: as the destination operand of a
setexpression. In addition, the operand of this expression must be a non-paradoxical
The presence of
strict_low_partsays that the part of the register which is meaningful in mode n, but is not part of mode m, is not to be altered. Normally, an assignment to such a subreg is allowed to have undefined effects on the rest of the register when m is less than a word.