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ARM Compiler armasm User Guide : WHILE and WEND

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}.

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.

Example

        GBLA count                  ; declare local variable
count   SETA    1                   ; you are not restricted to
        WHILE   count <= 4          ; such simple conditions
count   SETA    count+1             ; In this case, this code is
            ; code                  ; executed four times
            ; code                  ; 
        WEND

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