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You can use this directive to define names for numerical data that can be used instead of the actual numbers in the operands of machine-language instructions and directives in source code.

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We recommend defining frequently used numerical values as names. Even if a given value in the source program is to be changed, you will only need to change the value corresponding to the name.

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Incorrect formats for an operand will cause processing to end.

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The .set directive may be described anywhere in a source program.

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Each name is a redefinable symbol.

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Names cannot be externally defined.

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Any label reference or undefined symbol reference must not be used to specify a value.
Otherwise, an error occurs.

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If a symbol of the same name as a label name or a macro name defined by the .macro directive is specified, an error occurs.