RealView® Developer Kit Assembler Guide 6.4.5. WHILE and WEND

6.4.5. WHILE and WEND

The WHILE directive starts a sequence of instructions or directives that are to be assembled repeatedly. The sequence is terminated with a WEND directive.

Syntax

WHILE logical-expression

code

WEND

where:

logical-expression: is an expression that can evaluate to either {TRUE} or {FALSE} (see Logical expressions).

Usage

Use the WHILE directive, together with the WEND directive, to assemble a sequence of instructions a number of times. The number of repetitions can be zero.

You can use IF...ENDIF conditions within WHILE...WEND loops.

WHILE...WEND loops can be nested (see Nesting directives).

Example

count   SETA    1                   ; you are not restricted to
        WHILE   count <= 4          ; such simple conditions
count   SETA    count+1             ; In this case,
            ; code                  ; this code will be
            ; code                  ; repeated four times
        WEND

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