mirror of
https://github.com/irmen/prog8.git
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145 lines
3.5 KiB
Plaintext
145 lines
3.5 KiB
Plaintext
%output prg,basic
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%import c64lib
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~ main {
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var .word value
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memory .word memvalue = $8000
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start:
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A = 100
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; conditional if, without conditional expression. needs explicit if status.
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if_not goto label
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if_true goto label
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if_zero goto label
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if_cc goto label
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if_lt goto label
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if_le goto label
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if_ge goto label
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if_gt goto label
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if_cc goto value
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;if_cc goto memvalue
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if_cc goto #value
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;if_cc goto #memvalue
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if_cc goto [value]
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;if_cc goto [memvalue]
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;if_cc goto $c000
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;if_cc goto [$c000.word]
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label:
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; conditional if with a single 'truth' value (register)
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if_true A goto label2
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if_not A goto label2
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if_zero A goto label2
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if A goto label2
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if_true X goto label2
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if_not X goto label2
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if_zero X goto label2
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if X goto label2
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if_true Y goto label2
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if_not Y goto label2
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if_zero Y goto label2
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if Y goto label2
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if_true XY goto label2
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if_not XY goto label2
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if_zero XY goto label2
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if XY goto label2
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label2:
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; conditional if with a single 'truth' value (variable)
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if_true value goto label3
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if_not value goto label3
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if_zero value goto label3
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if value goto label3
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if_true memvalue goto label3
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if_not memvalue goto label3
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if_zero memvalue goto label3
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if memvalue goto label3
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label3:
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; conditional if with a single 'truth' value (indirect address)
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if_true [$c000] goto label4
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if_not [$c000] goto label4
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if_zero [$c000] goto label4
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if [$c000] goto label4
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if_true [XY] goto label4
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if_true [AY] goto label4
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if_true [AX] goto label4
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if_true [X] goto label4
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if_true [A] goto label4
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if_true [Y] goto label4
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label4:
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return
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}
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; @todo temporarily disabled until comparison operators are properly implemented:
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~ {
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var .text name = "?"*80
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var bytevar = 22
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var bytevar2 = 23
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var .word wordvar = 22345
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start:
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c64.init_system()
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A = 0
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printloop:
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c64scr.print_byte_decimal(A)
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c64.CHROUT('\n')
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A++
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if A <20 goto printloop
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return
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label1:
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if_true A==123 goto label1
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if_true A == 123 goto label1
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if_true A!=0 goto label1
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if_not X!=0 goto label1
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if_true A <= 1 goto label1
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if_true A==1 goto label1
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if_true A!=1 goto label1
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if_not X < 1 goto label1
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if_not Y>1 goto label1
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if_not X!=1 goto label1
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if_true 22<=Y goto label1
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if_true A<=22 goto label1
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if_true A<X goto label1
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if_true X>Y goto label1
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if_true X>A goto label1
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if A<=22 goto label1
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if A <= 22 goto label1
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if_zero A goto label1
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if_zero X goto label1
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if Y goto label1
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if_true XY goto label1
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if_not XY goto label1
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if A goto label1
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if_not goto label1
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if_true bytevar<=A goto label2
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if_true bytevar<=22 goto label2
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if bytevar<=22 goto label2
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if bytevar<=22 goto label2
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if bytevar goto label2
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if bytevar>bytevar2 goto label2
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if_zero bytevar goto label2
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if_not wordvar goto label2
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if_zero wordvar goto label2
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if_true wordvar goto label2
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label2:
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return
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}
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