.elseif

Starts an optional, alternative conditional assembly block, adding another boolean-expression condition.

  .elseif bool-expr statement-group
  

bool-expr

Any boolean expression.

statement-group

Any valid assembly statements.

This directive must be part of an .if ... .elseif ... [.else] ... .endif conditional structure (with each of these directives starting a new line). The assembler processes the assembly statements that .elseif introduces only if (1) the bool-expr condition of the .if directive is false, and (2) the bool-expr condition of the .elseif directive is true.

For a logical structure of multiple levels, you can use the .elseif directive several times, as in this pattern:

  .if bool-expr-1
      statement-group-1
  .elseif bool-expr-2
      statement-group-2
  .elseif bool-expr-3
      statement-group-3
  .elseif bool-expr-4
      statement-group-4
  .else
      statement-group-5
  .endif
  

• If this structure's bool-expr-1 is true, the assembler executes the statement-group-1 statements, then goes to the .endif directive.
• If bool-expr-1 is false, the assembler skips statement-group-1, executing the first .elseif directive. If bool-expr-2 is true, the assembler executes statement-group-2, then goes to the .endif directive.
• If bool-expr-2 also is false, the assembler skips statement-group-2, executing the second.elseif directive.
• The assembler continues evaluating the boolean expressions of succeeding .elseif directives until it comes to a boolean expression that is true.
• If none of the boolean expressions are true, the assembler processes statement-group-5, because this structure includes an .else directive.
• If none of the boolean values were true and there were no .else directive, the assembler would not process any of the statement groups.)