progs/while-compiler-arrays/compile_bfc.sc
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     1 // Some more interesting testcases for the 
       
     2 // WHILE compiler with arrays, it includes: 
       
     3 //
       
     4 //  - a small parser for WHILE programs
       
     5 //
       
     6 //  - transpiles BF programs into WHILE programs
       
     7 //    and then compiles and runs them
       
     8 //
       
     9 //  - the power-example is the Mandelbrot set:
       
    10 //       
       
    11 //       * 65k for the transpiled WHILE program 
       
    12 //       * parsing uses around 30 secs using fastparse
       
    13 //       * the jasmin assembly file is 236k
       
    14 //       * the resulting Java program takes about 20 secs 
       
    15 //
       
    16 // Call with (X being 0,1,..,4)
       
    17 //
       
    18 //  amm compile_bfc.sc all
       
    19 //  amm compile_bfc.sc bfcX
       
    20 
       
    21 
       
    22 // load the compiler
       
    23 import $file.compile_arrays
       
    24 import compile_arrays._ 
       
    25 
       
    26 def time_needed[T](i: Int, code: => T) = {
       
    27   val start = System.nanoTime()
       
    28   for (j <- 2 to i) code
       
    29   val result = code
       
    30   val end = System.nanoTime()
       
    31   ((end - start) / (i * 1.0e9), result)
       
    32 }
       
    33 
       
    34 // for BF we have to change the write library-function,
       
    35 // because in BF integers are written out as characters
       
    36 val beginning = """
       
    37 .class public XXX.XXX
       
    38 .super java/lang/Object
       
    39 
       
    40 .method public static write(I)V 
       
    41     .limit locals 1 
       
    42     .limit stack 2 
       
    43     getstatic java/lang/System/out Ljava/io/PrintStream; 
       
    44     iload 0
       
    45     i2c                                           ; Int => Char
       
    46     invokevirtual java/io/PrintStream/print(C)V   ; println(I)V => print(C)V    
       
    47     return 
       
    48 .end method
       
    49 
       
    50 .method public static main([Ljava/lang/String;)V
       
    51    .limit locals 200
       
    52    .limit stack 200
       
    53 
       
    54 ; COMPILED CODE STARTS   
       
    55 
       
    56 """
       
    57 
       
    58 
       
    59 // modified main compilation function for blocks
       
    60 def compile(bl: Block, class_name: String) : String = {
       
    61   val instructions = compile_block(bl, Map())._1
       
    62   (beginning ++ instructions ++ ending).replace("XXX", class_name)
       
    63 }
       
    64 
       
    65 // automating the above
       
    66 import ammonite.ops._
       
    67 
       
    68 def compile_to_file(bl: Block, class_name: String) : Unit = 
       
    69   write.over(pwd / s"$class_name.j", compile(bl, class_name))  
       
    70 
       
    71 def compile_and_run(bl: Block, class_name: String) : Unit = {
       
    72   println(s"Start of compilation")
       
    73   compile_to_file(bl, class_name)
       
    74   println(s"generated $class_name.j file")
       
    75   val (jasmin_time, _) = 
       
    76     time_needed(1, os.proc("java", "-jar", "jasmin.jar", s"$class_name.j").call())
       
    77   println(s"generated $class_name.class file (in $jasmin_time secs).")
       
    78   val (running_time, output) = 
       
    79     time_needed(1, os.proc("java", s"${class_name}/${class_name}").call().out.text())
       
    80   println(output)
       
    81   println(s"done (in $running_time secs).")
       
    82 }
       
    83 
       
    84 
       
    85 //=====================================
       
    86 // Grammar Rules for WHILE with arrays
       
    87 //=====================================
       
    88 
       
    89 import fastparse._
       
    90 import MultiLineWhitespace._
       
    91 
       
    92 def lowercase [_ : P] = P( CharIn("a-z") )
       
    93 def uppercase[_ : P]  = P( CharIn("A-Z") )
       
    94 def letter[_ : P]     = P( lowercase | uppercase )
       
    95 def digit [_ : P]     = P( CharIn("0-9") )
       
    96 
       
    97 def Number[_ : P]: P[Int] =  P( digit.rep(1) ).!.map(_.toInt)
       
    98 def Ident[_ : P]: P[String] = P( letter ~ (letter | digit | "_").rep ).!
       
    99 
       
   100 // arithmetic expressions
       
   101 def AExp[_ : P]: P[AExp] = 
       
   102   P(  P(Te ~ "+" ~ AExp).map{ case (l, r) => Aop("+", l, r)} 
       
   103     | P(Te ~ "-" ~ AExp).map{ case (l, r) => Aop("-", l, r)}
       
   104     | Te )
       
   105 def Te[_ : P]: P[AExp] = 
       
   106   P(  P(Fa ~ "*" ~ Te).map{ case (l, r) => Aop("*", l, r)} 
       
   107     | Fa )   
       
   108 def Fa[_ : P]: P[AExp] = 
       
   109   P( "(" ~ AExp ~ ")" 
       
   110      | P (Ident ~ "[" ~ AExp ~ "]").map{Ref.tupled}
       
   111      | P(Number).map{Num} 
       
   112      | P(Ident).map{Var} )
       
   113 
       
   114 // boolean expressions
       
   115 def BExp[_ : P]: P[BExp] = 
       
   116   P(  P(AExp ~ "=" ~ AExp).map{ case (x, z) => Bop("=", x, z)} 
       
   117     | P(AExp ~ "!=" ~ AExp).map{ case (x, z) => Bop("!=", x, z)}  
       
   118     | P(AExp ~ "<" ~ AExp).map{ case (x, z) => Bop("<", x, z)}  
       
   119     | P(AExp ~ ">" ~ AExp).map{ case (x, z) => Bop("<", z, x)}  
       
   120     | P("true").map{ _ => True} 
       
   121     | P("false").map{ _ => False} 
       
   122     | "(" ~ BExp ~ ")" )
       
   123 
       
   124 // statements and blocks
       
   125 def Stmt[_ : P]: P[Stmt] =
       
   126   P(  P("skip").map( _ => Skip) 
       
   127     | P(Ident ~ ":=" ~ AExp).map{Assign.tupled} 
       
   128     | P(Ident ~ "[" ~ AExp ~ "]" ~ ":=" ~ AExp).map{AssignA.tupled} 
       
   129     | P("if" ~ BExp ~ "then" ~ Block ~ "else" ~ Block).map{If.tupled} 
       
   130     | P("while" ~ BExp ~ "do" ~ Block).map{While.tupled} 
       
   131     | P("new(" ~ Ident ~ "[" ~ Number ~ "])").map{ArrayDef.tupled} 
       
   132     | P("write(" ~ Ident ~ ")").map{Write} ) 
       
   133 
       
   134 def Stmts[_ : P]: P[Block] =
       
   135   P(  P(Stmt ~ ";" ~ Stmts).map{ case (x, z) => x :: z } 
       
   136     | P(Stmt).map{s => List(s)} ) 
       
   137 
       
   138 def Block[_ : P]: P[Block] =
       
   139   P(  "{" ~ Stmts ~ "}" 
       
   140     | P(Stmt).map(s => List(s)) )
       
   141 
       
   142 // some test cases for the parser
       
   143 
       
   144 //println(fastparse.parse("(1 + (2 + 5)) + 4", AExp(_)).get)
       
   145 //println(fastparse.parse("1 + 2 + 3 + 45", AExp(_)))
       
   146 //println(fastparse.parse("1 + 2 * 3", AExp(_)))
       
   147 //println(fastparse.parse("x + 2 * 3", AExp(_)))
       
   148 //println(fastparse.parse("x2 := 5 + a", Stmts(_)))
       
   149 //println(fastparse.parse("x2 := 5 + a[3+a]", Stmts(_)))
       
   150 //println(fastparse.parse("a[x2+3] := 5 + a[3+a]", Stmts(_)))
       
   151 //println(fastparse.parse("{x := 5; y := 8}", Block(_)))
       
   152 //println(fastparse.parse("if (false) then {x := 5} else {x := 10}", Block(_)))
       
   153 
       
   154 val fib = 
       
   155  """n := 10;
       
   156     minus1 := 0;
       
   157     minus2 := 1;
       
   158     temp:=0;
       
   159     while (n > 0) do {
       
   160       temp := minus2; 
       
   161       minus2 := minus1 + minus2;
       
   162       minus1 := temp;
       
   163       n := n - 1};
       
   164     result := minus2;
       
   165     write(result)
       
   166    """
       
   167 
       
   168 //println(fastparse.parse(fib, Stmts(_)).get.value)
       
   169 
       
   170 
       
   171 
       
   172 //======================================
       
   173 // BF transpiler into WHILE with arrays
       
   174 //======================================
       
   175 
       
   176 // simple BF instructions translation
       
   177 def instr(c: Char) : String = c match {
       
   178   case '>' => "ptr := ptr + 1;"
       
   179   case '<' => "ptr := ptr - 1;"
       
   180   case '+' => "mem[ptr] := mem[ptr] + 1;"
       
   181   case '-' => "mem[ptr] := mem[ptr] - 1;"
       
   182   case '.' => "x := mem[ptr]; write x;"
       
   183   //case ',' => "XXX" // "ptr = getchar();\n"
       
   184   case '['  => "while (mem[ptr] != 0) do {"
       
   185   case ']'  => "skip};"
       
   186   case _ => ""
       
   187 }
       
   188 
       
   189 def instrs(prog: String) : String =
       
   190   prog.toList.map(instr).mkString
       
   191 
       
   192 
       
   193 // Note: Unfortunately, the transpiled mandelbrot.bf program 
       
   194 // is so large that it does not fit inside the limitations of 
       
   195 // what the JVM imposes on methods (only 64K of instructions).
       
   196 // Therefore some optimisations are first applied to 
       
   197 // BF programs before WHILE programs are created. The
       
   198 // optimisations are 
       
   199 //  
       
   200 //  - replacing BF-loops of the form [-] with a new 0-instruction 
       
   201 //  - combining single increment/decrement instructions
       
   202 //
       
   203 // The size of the resulting .j-file is 270K.
       
   204 
       
   205 
       
   206 def splice(cs: List[Char], acc: List[(Char, Int)]) : List[(Char, Int)] = (cs, acc) match {
       
   207   case (Nil, acc) => acc
       
   208   case (c :: cs, Nil) => splice(cs, List((c, 1)))
       
   209   case (c :: cs, (d, n) :: acc) => 
       
   210     if (c == d) splice(cs, (c, n + 1) :: acc)
       
   211     else splice(cs, (c, 1) :: (d, n) :: acc)
       
   212 }
       
   213 
       
   214 def spl(s: String) = splice(s.toList, Nil).reverse
       
   215 
       
   216 def instr2(c: Char, n: Int) : String = c match {
       
   217   case '>' => s"ptr := ptr + $n;"
       
   218   case '<' => s"ptr := ptr - $n;"
       
   219   case '0' => s"mem[ptr] := 0;"
       
   220   case '+' => s"mem[ptr] := mem[ptr] + $n;"
       
   221   case '-' => s"mem[ptr] := mem[ptr] - $n;"
       
   222   case '.' => s"x := mem[ptr]; write(x);" 
       
   223   case '['  => "while (mem[ptr] != 0) do {" * n 
       
   224   case ']'  => "skip};" * n
       
   225   case _ => ""
       
   226 }
       
   227 
       
   228 def instrs2(prog: String) : String =
       
   229   spl(prog.replaceAll("""\[-\]""", "0")).map{ case (c, n) => instr2(c, n) }.mkString
       
   230 
       
   231 // adding the "header" to the BF program
       
   232 def bf_str(prog: String) : String = {
       
   233   "new(mem[30000]);" ++
       
   234   "ptr := 15000;" ++
       
   235   instrs2(prog) ++
       
   236   "skip"
       
   237 }
       
   238 
       
   239 
       
   240 def bf_run(prog: String, name: String) = {
       
   241   println(s"BF pre-processing of $name")
       
   242   val bf_string = bf_str(prog)
       
   243   println(s"BF parsing (program length ${bf_string.length} characters)")
       
   244   val (time, bf_prog) = 
       
   245     time_needed(1, fastparse.parse(bf_string, Stmts(_)).get.value)
       
   246   println(s"BF generated WHILE program (needed $time for parsing)")
       
   247   compile_and_run(bf_prog, name)
       
   248 }
       
   249 
       
   250 // a benchmark program (counts down from 'Z' to 'A')
       
   251 val bf0 = """>++[<+++++++++++++>-]<[[>+>+<<-]>[<+>-]++++++++
       
   252             [>++++++++<-]>.[-]<<>++++++++++[>++++++++++[>++
       
   253             ++++++++[>++++++++++[>++++++++++[>++++++++++[>+
       
   254             +++++++++[-]<-]<-]<-]<-]<-]<-]<-]++++++++++."""
       
   255 
       
   256 @doc(" Benchmark 'Z' to 'A'.")
       
   257 @main
       
   258 def bfc0() = bf_run(bf0, "bench")
       
   259 
       
   260 // Sierpinski triangle
       
   261 val bf1 = """++++++++[>+>++++<<-]>++>>+<[-[>>+<<-]+>>]>+[-<<<[
       
   262       ->[+[-]+>++>>>-<<]<[<]>>++++++[<<+++++>>-]+<<++.[-]<<
       
   263       ]>.>+[>>]>+]"""
       
   264 
       
   265 @doc(" Sierpinski triangle.")
       
   266 @main
       
   267 def bfc1() = bf_run(bf1, "sier")
       
   268 
       
   269 // Hello World
       
   270 val bf2 = """++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]
       
   271       >>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++."""
       
   272 
       
   273 @doc(" Hello world.")
       
   274 @main
       
   275 def bfc2() = bf_run(bf2, "hello")
       
   276 
       
   277 // Fibonacci 
       
   278 val bf3 = """+++++++++++
       
   279       >+>>>>++++++++++++++++++++++++++++++++++++++++++++
       
   280       >++++++++++++++++++++++++++++++++<<<<<<[>[>>>>>>+>
       
   281       +<<<<<<<-]>>>>>>>[<<<<<<<+>>>>>>>-]<[>++++++++++[-
       
   282       <-[>>+>+<<<-]>>>[<<<+>>>-]+<[>[-]<[-]]>[<<[>>>+<<<
       
   283       -]>>[-]]<<]>>>[>>+>+<<<-]>>>[<<<+>>>-]+<[>[-]<[-]]
       
   284       >[<<+>>[-]]<<<<<<<]>>>>>[+++++++++++++++++++++++++
       
   285       +++++++++++++++++++++++.[-]]++++++++++<[->-<]>++++
       
   286       ++++++++++++++++++++++++++++++++++++++++++++.[-]<<
       
   287       <<<<<<<<<<[>>>+>+<<<<-]>>>>[<<<<+>>>>-]<-[>>.>.<<<
       
   288       [-]]<<[>>+>+<<<-]>>>[<<<+>>>-]<<[<+>-]>[<+>-]<<<-]
       
   289       [-]++++++++++."""
       
   290 
       
   291 @doc(" Fibonacci numbers.")
       
   292 @main
       
   293 def bfc3() = bf_run(bf3, "fibs")
       
   294 
       
   295 // Mandelbrot Set
       
   296 //----------------
       
   297 //
       
   298 // Note: Parsing of the generated WHILE program (around 60K in size)
       
   299 // takes approximately 10 minutes to parse with the parser combinators, and
       
   300 // approximately 30 seconds with fastparse
       
   301 
       
   302 
       
   303 val bf4 = """A mandelbrot set fractal viewer in brainf*** written by Erik Bosman
       
   304 +++++++++++++[->++>>>+++++>++>+<<<<<<]>>>>>++++++>--->>>>>>>>>>+++++++++++++++[[
       
   305 >>>>>>>>>]+[<<<<<<<<<]>>>>>>>>>-]+[>>>>>>>>[-]>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>[-]+
       
   306 <<<<<<<+++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>>>+>>>>>>>>>>>>>>>>>>>>>>>>>>
       
   307 >+<<<<<<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+[>>>>>>[>>>>>>>[-]>>]<<<<<<<<<[<<<<<<<<<]>>
       
   308 >>>>>[-]+<<<<<<++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>>+<<<<<<+++++++[-[->>>
       
   309 >>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>>+<<<<<<<<<<<<<<<<[<<<<<<<<<]>>>[[-]>>>>>>[>>>>>
       
   310 >>[-<<<<<<+>>>>>>]<<<<<<[->>>>>>+<<+<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>
       
   311 [>>>>>>>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+<<+<<<+<<]>>>>>>>>]<<<<<<<<<[<<<<<<<
       
   312 <<]>>>>>>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+<<+<<<<<]>>>>>>>>>+++++++++++++++[[
       
   313 >>>>>>>>>]+>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+[
       
   314 >+>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>[-<<<<+>>>>]<<<<[->>>>+<<<<<[->>[
       
   315 -<<+>>]<<[->>+>>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<
       
   316 <<[>[->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<]>[->>>>>>>>>+<<<<<<<<<]<+>>>>>>>>]<<<<<<<<<
       
   317 [>[-]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<<]<+<<<<<<<<<]>>>>>
       
   318 >>>>[>+>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>>[-<<<<<+>>>>>]<<<<<[->>>>>+
       
   319 <<<<<<[->>>[-<<<+>>>]<<<[->>>+>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>
       
   320 >>>>>>>]<<<<<<<<<[>>[->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<<]>>[->>>>>>>>>+<<<<<<<<<]<<
       
   321 +>>>>>>>>]<<<<<<<<<[>[-]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<
       
   322 <]<+<<<<<<<<<]>>>>>>>>>[>>>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>
       
   323 >>>>>>>>>>>>>>>>>>>>>>>]>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[[>>>>
       
   324 >>>>>]<<<<<<<<<-<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+>>>>>>>>>>>>>>>>>>>>>+<<<[<<<<<<
       
   325 <<<]>>>>>>>>>[>>>[-<<<->>>]+<<<[->>>->[-<<<<+>>>>]<<<<[->>>>+<<<<<<<<<<<<<[<<<<<
       
   326 <<<<]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>>>[-<<<<->>>>]+<<<<[->>>>-<[-<<<+>>>]<<<[->
       
   327 >>+<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+>>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>>>>>>>>]<<<<<<
       
   328 <<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]<<<<<<<[->+>>>-<<<<]>>>>>>>>>+++++++++++++++++++
       
   329 +++++++>>[-<<<<+>>>>]<<<<[->>>>+<<[-]<<]>>[<<<<<<<+<[-<+>>>>+<<[-]]>[-<<[->+>>>-
       
   330 <<<<]>>>]>>>>>>>>>>>>>[>>[-]>[-]>[-]>>>>>]<<<<<<<<<[<<<<<<<<<]>>>[-]>>>>>>[>>>>>
       
   331 [-<<<<+>>>>]<<<<[->>>>+<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>[-<<<<<<<<
       
   332 <+>>>>>>>>>]>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[[>>>>>>>>>]+>[-
       
   333 ]>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+[>+>>>>>>>>]<<<
       
   334 <<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>>[-<<<<<+>>>>>]<<<<<[->>>>>+<<<<<<[->>[-<<+>>]<
       
   335 <[->>+>+<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<<<[>[->>>>
       
   336 >>>>>+<<<<<<<<<]<<<<<<<<<<]>[->>>>>>>>>+<<<<<<<<<]<+>>>>>>>>]<<<<<<<<<[>[-]<->>>
       
   337 [-<<<+>[<->-<<<<<<<+>>>>>>>]<[->+<]>>>]<<[->>+<<]<+<<<<<<<<<]>>>>>>>>>[>>>>>>[-<
       
   338 <<<<+>>>>>]<<<<<[->>>>>+<<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>+>>>>>>>>
       
   339 ]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>>[-<<<<<+>>>>>]<<<<<[->>>>>+<<<<<<[->>[-<<+
       
   340 >>]<<[->>+>>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<<<[>
       
   341 [->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<]>[->>>>>>>>>+<<<<<<<<<]<+>>>>>>>>]<<<<<<<<<[>[-
       
   342 ]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<<]<+<<<<<<<<<]>>>>>>>>>
       
   343 [>>>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
       
   344 ]>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>
       
   345 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>]>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>++++++++
       
   346 +++++++[[>>>>>>>>>]<<<<<<<<<-<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+[>>>>>>>>[-<<<<<<<+
       
   347 >>>>>>>]<<<<<<<[->>>>>>>+<<<<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>>>>[
       
   348 -]>>>]<<<<<<<<<[<<<<<<<<<]>>>>+>[-<-<<<<+>>>>>]>[-<<<<<<[->>>>>+<++<<<<]>>>>>[-<
       
   349 <<<<+>>>>>]<->+>]<[->+<]<<<<<[->>>>>+<<<<<]>>>>>>[-]<<<<<<+>>>>[-<<<<->>>>]+<<<<
       
   350 [->>>>->>>>>[>>[-<<->>]+<<[->>->[-<<<+>>>]<<<[->>>+<<<<<<<<<<<<[<<<<<<<<<]>>>[-]
       
   351 +>>>>>>[>>>>>>>>>]>+<]]+>>>[-<<<->>>]+<<<[->>>-<[-<<+>>]<<[->>+<<<<<<<<<<<[<<<<<
       
   352 <<<<]>>>>[-]+>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>>>>>>>>]<<<<<<<<]>>>>>>>>]<<<<<<<<<
       
   353 [<<<<<<<<<]>>>>[-<<<<+>>>>]<<<<[->>>>+>>>>>[>+>>[-<<->>]<<[->>+<<]>>>>>>>>]<<<<<
       
   354 <<<+<[>[->>>>>+<<<<[->>>>-<<<<<<<<<<<<<<+>>>>>>>>>>>[->>>+<<<]<]>[->>>-<<<<<<<<<
       
   355 <<<<<+>>>>>>>>>>>]<<]>[->>>>+<<<[->>>-<<<<<<<<<<<<<<+>>>>>>>>>>>]<]>[->>>+<<<]<<
       
   356 <<<<<<<<<<]>>>>[-]<<<<]>>>[-<<<+>>>]<<<[->>>+>>>>>>[>+>[-<->]<[->+<]>>>>>>>>]<<<
       
   357 <<<<<+<[>[->>>>>+<<<[->>>-<<<<<<<<<<<<<<+>>>>>>>>>>[->>>>+<<<<]>]<[->>>>-<<<<<<<
       
   358 <<<<<<<+>>>>>>>>>>]<]>>[->>>+<<<<[->>>>-<<<<<<<<<<<<<<+>>>>>>>>>>]>]<[->>>>+<<<<
       
   359 ]<<<<<<<<<<<]>>>>>>+<<<<<<]]>>>>[-<<<<+>>>>]<<<<[->>>>+>>>>>[>>>>>>>>>]<<<<<<<<<
       
   360 [>[->>>>>+<<<<[->>>>-<<<<<<<<<<<<<<+>>>>>>>>>>>[->>>+<<<]<]>[->>>-<<<<<<<<<<<<<<
       
   361 +>>>>>>>>>>>]<<]>[->>>>+<<<[->>>-<<<<<<<<<<<<<<+>>>>>>>>>>>]<]>[->>>+<<<]<<<<<<<
       
   362 <<<<<]]>[-]>>[-]>[-]>>>>>[>>[-]>[-]>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>>>[-<
       
   363 <<<+>>>>]<<<<[->>>>+<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[
       
   364 [>>>>>>>>>]+>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+
       
   365 [>+>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>[-<<<<+>>>>]<<<<[->>>>+<<<<<[->>
       
   366 [-<<+>>]<<[->>+>+<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<<
       
   367 <[>[->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<]>[->>>>>>>>>+<<<<<<<<<]<+>>>>>>>>]<<<<<<<<<[
       
   368 >[-]<->>>[-<<<+>[<->-<<<<<<<+>>>>>>>]<[->+<]>>>]<<[->>+<<]<+<<<<<<<<<]>>>>>>>>>[
       
   369 >>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>]>
       
   370 >>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>[-]>>>>+++++++++++++++[[>>>>>>>>>]<<<<<<<<<-<<<<<
       
   371 <<<<[<<<<<<<<<]>>>>>>>>>-]+[>>>[-<<<->>>]+<<<[->>>->[-<<<<+>>>>]<<<<[->>>>+<<<<<
       
   372 <<<<<<<<[<<<<<<<<<]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>>>[-<<<<->>>>]+<<<<[->>>>-<[-
       
   373 <<<+>>>]<<<[->>>+<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+>>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>
       
   374 >>>>>>>]<<<<<<<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>[-<<<+>>>]<<<[->>>+>>>>>>[>+>>>
       
   375 [-<<<->>>]<<<[->>>+<<<]>>>>>>>>]<<<<<<<<+<[>[->+>[-<-<<<<<<<<<<+>>>>>>>>>>>>[-<<
       
   376 +>>]<]>[-<<-<<<<<<<<<<+>>>>>>>>>>>>]<<<]>>[-<+>>[-<<-<<<<<<<<<<+>>>>>>>>>>>>]<]>
       
   377 [-<<+>>]<<<<<<<<<<<<<]]>>>>[-<<<<+>>>>]<<<<[->>>>+>>>>>[>+>>[-<<->>]<<[->>+<<]>>
       
   378 >>>>>>]<<<<<<<<+<[>[->+>>[-<<-<<<<<<<<<<+>>>>>>>>>>>[-<+>]>]<[-<-<<<<<<<<<<+>>>>
       
   379 >>>>>>>]<<]>>>[-<<+>[-<-<<<<<<<<<<+>>>>>>>>>>>]>]<[-<+>]<<<<<<<<<<<<]>>>>>+<<<<<
       
   380 ]>>>>>>>>>[>>>[-]>[-]>[-]>>>>]<<<<<<<<<[<<<<<<<<<]>>>[-]>[-]>>>>>[>>>>>>>[-<<<<<
       
   381 <+>>>>>>]<<<<<<[->>>>>>+<<<<+<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>+>[-<-<<<<+>>>>
       
   382 >]>>[-<<<<<<<[->>>>>+<++<<<<]>>>>>[-<<<<<+>>>>>]<->+>>]<<[->>+<<]<<<<<[->>>>>+<<
       
   383 <<<]+>>>>[-<<<<->>>>]+<<<<[->>>>->>>>>[>>>[-<<<->>>]+<<<[->>>-<[-<<+>>]<<[->>+<<
       
   384 <<<<<<<<<[<<<<<<<<<]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>[-<<->>]+<<[->>->[-<<<+>>>]<
       
   385 <<[->>>+<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+>>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>>>>>>>>]<
       
   386 <<<<<<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>[-<<<+>>>]<<<[->>>+>>>>>>[>+>[-<->]<[->+
       
   387 <]>>>>>>>>]<<<<<<<<+<[>[->>>>+<<[->>-<<<<<<<<<<<<<+>>>>>>>>>>[->>>+<<<]>]<[->>>-
       
   388 <<<<<<<<<<<<<+>>>>>>>>>>]<]>>[->>+<<<[->>>-<<<<<<<<<<<<<+>>>>>>>>>>]>]<[->>>+<<<
       
   389 ]<<<<<<<<<<<]>>>>>[-]>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+<<+<<<<<]]>>>>[-<<<<+>
       
   390 >>>]<<<<[->>>>+>>>>>[>+>>[-<<->>]<<[->>+<<]>>>>>>>>]<<<<<<<<+<[>[->>>>+<<<[->>>-
       
   391 <<<<<<<<<<<<<+>>>>>>>>>>>[->>+<<]<]>[->>-<<<<<<<<<<<<<+>>>>>>>>>>>]<<]>[->>>+<<[
       
   392 ->>-<<<<<<<<<<<<<+>>>>>>>>>>>]<]>[->>+<<]<<<<<<<<<<<<]]>>>>[-]<<<<]>>>>[-<<<<+>>
       
   393 >>]<<<<[->>>>+>[-]>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+<<+<<<<<]>>>>>>>>>[>>>>>>
       
   394 >>>]<<<<<<<<<[>[->>>>+<<<[->>>-<<<<<<<<<<<<<+>>>>>>>>>>>[->>+<<]<]>[->>-<<<<<<<<
       
   395 <<<<<+>>>>>>>>>>>]<<]>[->>>+<<[->>-<<<<<<<<<<<<<+>>>>>>>>>>>]<]>[->>+<<]<<<<<<<<
       
   396 <<<<]]>>>>>>>>>[>>[-]>[-]>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>[-]>[-]>>>>>[>>>>>[-<<<<+
       
   397 >>>>]<<<<[->>>>+<<<+<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>>>>[-<<<<<+>>>>>
       
   398 ]<<<<<[->>>>>+<<<+<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[[>>>>
       
   399 >>>>>]+>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]>[-]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+[>+>>
       
   400 >>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>[-<<<<+>>>>]<<<<[->>>>+<<<<<[->>[-<<+
       
   401 >>]<<[->>+>>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>>>>]<<<<<<<<<[>
       
   402 [->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<]>[->>>>>>>>>+<<<<<<<<<]<+>>>>>>>>]<<<<<<<<<[>[-
       
   403 ]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<<]<+<<<<<<<<<]>>>>>>>>>
       
   404 [>+>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>->>>>>[-<<<<<+>>>>>]<<<<<[->>>>>+<<<<
       
   405 <<[->>>[-<<<+>>>]<<<[->>>+>+<<<<]+>>>>>>>>>]<<<<<<<<[<<<<<<<<<]]>>>>>>>>>[>>>>>>
       
   406 >>>]<<<<<<<<<[>>[->>>>>>>>>+<<<<<<<<<]<<<<<<<<<<<]>>[->>>>>>>>>+<<<<<<<<<]<<+>>>
       
   407 >>>>>]<<<<<<<<<[>[-]<->>>>[-<<<<+>[<->-<<<<<<+>>>>>>]<[->+<]>>>>]<<<[->>>+<<<]<+
       
   408 <<<<<<<<<]>>>>>>>>>[>>>>[-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>
       
   409 >>>>>>>>>>>>>>>>>>>]>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>+++++++++++++++[[>>>>>>>>
       
   410 >]<<<<<<<<<-<<<<<<<<<[<<<<<<<<<]>>>>>>>>>-]+>>>>>>>>>>>>>>>>>>>>>+<<<[<<<<<<<<<]
       
   411 >>>>>>>>>[>>>[-<<<->>>]+<<<[->>>->[-<<<<+>>>>]<<<<[->>>>+<<<<<<<<<<<<<[<<<<<<<<<
       
   412 ]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>>>[-<<<<->>>>]+<<<<[->>>>-<[-<<<+>>>]<<<[->>>+<
       
   413 <<<<<<<<<<<[<<<<<<<<<]>>>[-]+>>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>>>>>>>>]<<<<<<<<]>
       
   414 >>>>>>>]<<<<<<<<<[<<<<<<<<<]>>->>[-<<<<+>>>>]<<<<[->>>>+<<[-]<<]>>]<<+>>>>[-<<<<
       
   415 ->>>>]+<<<<[->>>>-<<<<<<.>>]>>>>[-<<<<<<<.>>>>>>>]<<<[-]>[-]>[-]>[-]>[-]>[-]>>>[
       
   416 >[-]>[-]>[-]>[-]>[-]>[-]>>>]<<<<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>>>[-]>>>>]<<<<<<<<<
       
   417 [<<<<<<<<<]>+++++++++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>+>>>>>>>>>+<<<<<<<<
       
   418 <<<<<<[<<<<<<<<<]>>>>>>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+[-]>>[>>>>>>>>>]<<<<<
       
   419 <<<<[>>>>>>>[-<<<<<<+>>>>>>]<<<<<<[->>>>>>+<<<<<<<[<<<<<<<<<]>>>>>>>[-]+>>>]<<<<
       
   420 <<<<<<]]>>>>>>>[-<<<<<<<+>>>>>>>]<<<<<<<[->>>>>>>+>>[>+>>>>[-<<<<->>>>]<<<<[->>>
       
   421 >+<<<<]>>>>>>>>]<<+<<<<<<<[>>>>>[->>+<<]<<<<<<<<<<<<<<]>>>>>>>>>[>>>>>>>>>]<<<<<
       
   422 <<<<[>[-]<->>>>>>>[-<<<<<<<+>[<->-<<<+>>>]<[->+<]>>>>>>>]<<<<<<[->>>>>>+<<<<<<]<
       
   423 +<<<<<<<<<]>>>>>>>-<<<<[-]+<<<]+>>>>>>>[-<<<<<<<->>>>>>>]+<<<<<<<[->>>>>>>->>[>>
       
   424 >>>[->>+<<]>>>>]<<<<<<<<<[>[-]<->>>>>>>[-<<<<<<<+>[<->-<<<+>>>]<[->+<]>>>>>>>]<<
       
   425 <<<<[->>>>>>+<<<<<<]<+<<<<<<<<<]>+++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>+<<<
       
   426 <<[<<<<<<<<<]>>>>>>>>>[>>>>>[-<<<<<->>>>>]+<<<<<[->>>>>->>[-<<<<<<<+>>>>>>>]<<<<
       
   427 <<<[->>>>>>>+<<<<<<<<<<<<<<<<[<<<<<<<<<]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>>>>>>[-<
       
   428 <<<<<<->>>>>>>]+<<<<<<<[->>>>>>>-<<[-<<<<<+>>>>>]<<<<<[->>>>>+<<<<<<<<<<<<<<[<<<
       
   429 <<<<<<]>>>[-]+>>>>>>[>>>>>>>>>]>[-]+<]]+>[-<[>>>>>>>>>]<<<<<<<<]>>>>>>>>]<<<<<<<
       
   430 <<[<<<<<<<<<]>>>>[-]<<<+++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>-<<<<<[<<<<<<<
       
   431 <<]]>>>]<<<<.>>>>>>>>>>[>>>>>>[-]>>>]<<<<<<<<<[<<<<<<<<<]>++++++++++[-[->>>>>>>>
       
   432 >+<<<<<<<<<]>>>>>>>>>]>>>>>+>>>>>>>>>+<<<<<<<<<<<<<<<[<<<<<<<<<]>>>>>>>>[-<<<<<<
       
   433 <<+>>>>>>>>]<<<<<<<<[->>>>>>>>+[-]>[>>>>>>>>>]<<<<<<<<<[>>>>>>>>[-<<<<<<<+>>>>>>
       
   434 >]<<<<<<<[->>>>>>>+<<<<<<<<[<<<<<<<<<]>>>>>>>>[-]+>>]<<<<<<<<<<]]>>>>>>>>[-<<<<<
       
   435 <<<+>>>>>>>>]<<<<<<<<[->>>>>>>>+>[>+>>>>>[-<<<<<->>>>>]<<<<<[->>>>>+<<<<<]>>>>>>
       
   436 >>]<+<<<<<<<<[>>>>>>[->>+<<]<<<<<<<<<<<<<<<]>>>>>>>>>[>>>>>>>>>]<<<<<<<<<[>[-]<-
       
   437 >>>>>>>>[-<<<<<<<<+>[<->-<<+>>]<[->+<]>>>>>>>>]<<<<<<<[->>>>>>>+<<<<<<<]<+<<<<<<
       
   438 <<<]>>>>>>>>-<<<<<[-]+<<<]+>>>>>>>>[-<<<<<<<<->>>>>>>>]+<<<<<<<<[->>>>>>>>->[>>>
       
   439 >>>[->>+<<]>>>]<<<<<<<<<[>[-]<->>>>>>>>[-<<<<<<<<+>[<->-<<+>>]<[->+<]>>>>>>>>]<<
       
   440 <<<<<[->>>>>>>+<<<<<<<]<+<<<<<<<<<]>+++++[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>
       
   441 +>>>>>>>>>>>>>>>>>>>>>>>>>>>+<<<<<<[<<<<<<<<<]>>>>>>>>>[>>>>>>[-<<<<<<->>>>>>]+<
       
   442 <<<<<[->>>>>>->>[-<<<<<<<<+>>>>>>>>]<<<<<<<<[->>>>>>>>+<<<<<<<<<<<<<<<<<[<<<<<<<
       
   443 <<]>>>>[-]+>>>>>[>>>>>>>>>]>+<]]+>>>>>>>>[-<<<<<<<<->>>>>>>>]+<<<<<<<<[->>>>>>>>
       
   444 -<<[-<<<<<<+>>>>>>]<<<<<<[->>>>>>+<<<<<<<<<<<<<<<[<<<<<<<<<]>>>[-]+>>>>>>[>>>>>>
       
   445 >>>]>[-]+<]]+>[-<[>>>>>>>>>]<<<<<<<<]>>>>>>>>]<<<<<<<<<[<<<<<<<<<]>>>>[-]<<<++++
       
   446 +[-[->>>>>>>>>+<<<<<<<<<]>>>>>>>>>]>>>>>->>>>>>>>>>>>>>>>>>>>>>>>>>>-<<<<<<[<<<<
       
   447 <<<<<]]>>>]"""
       
   448 
       
   449 @doc(" Mandelbrot set.")
       
   450 @main
       
   451 def bfc4() = bf_run(bf4, "mand")
       
   452 
       
   453 
       
   454 //
       
   455 @doc(" All benchmarks.")
       
   456 @main
       
   457 def all() = { bfc0(); bfc1(); bfc2(); bfc3(); bfc4() }