%output prg,basic

%import c64lib


~ main {
        var     .word   value
        memory  .word   memvalue  = $8000


start:
        A = 100


        ; conditional if, without conditional expression. needs explicit if status.
        if_not goto label
        if_true goto label
        if_zero goto label
        if_cc goto label
        if_lt goto label
        if_le goto label
        if_ge goto label
        if_gt goto label
        if_cc goto value
        ;if_cc goto memvalue
        if_cc goto #value
        ;if_cc goto #memvalue
        if_cc goto [value]
        ;if_cc goto [memvalue]
        ;if_cc goto $c000
        ;if_cc goto [$c000.word]

label:
        ; conditional if with a single 'truth' value (register)
        if_true A goto label2
        if_not A goto label2
        if_zero A goto label2
        if A goto label2
        if_true X goto label2
        if_not X goto label2
        if_zero X goto label2
        if X goto label2
        if_true Y goto label2
        if_not Y goto label2
        if_zero Y goto label2
        if Y goto label2
        if_true XY goto label2
        if_not XY goto label2
        if_zero XY goto label2
        if XY goto label2

label2:
        ; conditional if with a single 'truth' value (variable)
        if_true value goto label3
        if_not value goto label3
        if_zero value goto label3
        if value goto label3
        if_true memvalue goto label3
        if_not memvalue goto label3
        if_zero memvalue goto label3
        if memvalue goto label3

label3:
        ; conditional if with a single 'truth' value (indirect address)
        if_true [$c000] goto label4
        if_not [$c000] goto label4
        if_zero [$c000] goto label4
        if [$c000] goto label4
        if_true [XY] goto label4
        if_true [AY] goto label4
        if_true [AX] goto label4
        if_true [X] goto label4
        if_true [A] goto label4
        if_true [Y] goto label4

label4:
        return
}



; @todo temporarily disabled until comparison operators are properly implemented:

~  {
        var  .text  name        = "?"*80
        var  bytevar = 22
        var  bytevar2 = 23
        var .word wordvar = 22345


start:
        c64.init_system()

        A = 0
printloop:
        c64scr.print_byte_decimal(A)
        c64.CHROUT('\n')
        A++
        if A <20 goto printloop
        return

label1:
        if_true  A==123  goto  label1
        if_true  A     ==     123  goto  label1
        if_true A!=0  goto  label1
        if_not X!=0  goto  label1

        if_true   A  <=  1  goto  label1
        if_true A==1  goto  label1
        if_true A!=1  goto  label1
        if_not X <   1  goto  label1
        if_not Y>1  goto  label1
        if_not X!=1  goto  label1

        if_true 22<=Y  goto  label1
        if_true A<=22  goto  label1
        if_true A<X  goto  label1
        if_true X>Y  goto  label1
        if_true X>A  goto  label1
        if A<=22  goto  label1
        if   A <=  22  goto  label1
        if_zero  A  goto  label1
        if_zero X  goto  label1
        if Y  goto  label1
        if_true XY  goto  label1
        if_not XY  goto  label1
        if A  goto  label1
        if_not goto label1

        if_true bytevar<=A  goto  label2
        if_true bytevar<=22  goto  label2
        if bytevar<=22  goto  label2
        if bytevar<=22  goto  label2
        if bytevar  goto  label2
        if bytevar>bytevar2 goto  label2
        if_zero bytevar  goto  label2
        if_not wordvar  goto  label2
        if_zero wordvar  goto  label2
        if_true wordvar  goto  label2


label2:
        return
}