Length attribute value of symbols naming constants

The length attribute value assigned to the symbols in the name field of the constants is equal to one of:

The implicit length (see "Implicit Length" in Table 1) of the constant when no explicit length is specified in the operand of the constant.
The explicit length (see "Value of Length Attribute" in Table 1) of the constant.

If more than one operand is present, the length attribute value of the symbol is the length in bytes of the first constant specified, according to its implicit or explicit length.