Texas Instruments TMS320C54x, User Manual

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.asg/.eval
Assign Character Strings to Substitution Symbols
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Syntax
.asg [ ” ]character string[ ” ], substitution symbol
.eval well-defined expression, substitution symbol
Description The .asg directive assigns character strings to substitution symbols. Substitu-
tion symbols are stored in the substitution symbol table. The .asg directive can
be used in many of the same ways as the .set directive, but while .set assigns
a constant value (which cannot be redefined) to a symbol, .asg assigns a char-
acter string (which can be redefined) to a substitution symbol.
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The assembler assigns the character string to the substitution symbol.
The quotation marks are optional. If there are no quotation marks, the as-
sembler reads characters up to the first comma and removes leading and
trailing blanks. In either case, a character string is read and assigned to
the substitution symbol.
-
The
substitution symbol must be a valid symbol name. The substitution
symbol may be 32 characters long and must begin with a letter. Remaining
characters of the symbol can be a combination of alphanumeric charac-
ters, the underscore (_), and the dollar sign ($).
The .eval directive performs arithmetic on substitution symbols, which are
stored in the substitution symbol table. This directive evaluates the expression
and assigns the
string value of the result to the substitution symbol. The .eval
directive is especially useful as a counter in .loop/.endloop blocks.
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The well-defined expression is an alphanumeric expression consisting of
legal values that have been previously defined, so that the result is an ab-
solute.
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The substitution symbol must be a valid symbol name. The substitution
symbol may be 32 characters long and must begin with a letter. Remaining
characters of the symbol can be a combination of alphanumeric charac-
ters, the underscore (_), and the dollar sign ($).