Add support for binary generation.

src/chalk/codegen.cr

@@ -131,7 +131,8 @@ module Chalk
         call tree.name
 
         # Reduce stack pointer
-        op TokenType::OpSub, STACK_REG, start_at
+        load free, start_at
+        opr TokenType::OpSub, STACK_REG, free
         # Move I to stack
         setis
         # Get to correct stack position

src/chalk/compiler.cr

@@ -58,11 +58,15 @@ module Chalk
       end
     end
 
-    private def run_intermediate
+    private def generate_ir
       trees = create_trees(@config.file)
       table = process_initial(trees)
       raise "No main function!" unless table["main"]?
-      code = generate_code(trees, table)
+      return { table, generate_code(trees, table) }
+    end
+
+    private def run_intermediate
+      table, code = generate_ir
       code.each do |name, insts|
         puts "Code for #{name}:"
         insts.each { |it| puts it }
@@ -70,7 +74,31 @@ module Chalk
       end
     end
 
+    private def generate_binary(instructions)
+    end
+
     private def run_binary
+      all_instructions = [] of Instruction
+      table, code = generate_ir
+      all_instructions.concat code["main"]
+      table["main"]?.as(FunctionEntry).addr = 0
+      all_instructions << JumpRelativeInstruction.new 0
+      code.delete "main"
+      code.each do |key, value|
+          table[key]?.as(FunctionEntry).addr = all_instructions.size
+        all_instructions.concat(value)
+        all_instructions << ReturnInstruction.new
+      end
+      context = InstructionContext.new table, all_instructions.size
+      binary = all_instructions.map_with_index { |it, i| it.to_bin(context, i).to_u16 }
+      file = File.open("out.ch8", "w")
+      binary.each do |inst|
+          first = (inst >> 8).to_u8
+          file.write_byte(first)
+          second = (inst & 0xff).to_u8
+          file.write_byte(second)
+      end
+      file.close
     end
 
     def run

src/chalk/ir.cr

@@ -2,6 +2,17 @@ require "./lexer.cr"
 
 module Chalk
   class Instruction
+    def to_bin(i, index)
+      return 0
+    end
+  end
+
+  class InstructionContext
+      property table : Table
+      property stack : Int32
+
+      def initialize(@table, @stack)
+      end
   end
 
   class LoadInstruction < Instruction
@@ -16,6 +27,10 @@ module Chalk
       @register.to_s(16, io)
       io << " " << @value
     end
+
+    def to_bin(i, index)
+        0x6000 | (register << 8) | value
+    end
   end
 
   class LoadRegInstruction < Instruction
@@ -31,6 +46,10 @@ module Chalk
       io << " R"
       @from.to_s(16, io)
     end
+
+    def to_bin(i, index)
+        0x8000 | (into << 8) | (from << 4)
+    end
   end
 
   class OpInstruction < Instruction
@@ -46,6 +65,15 @@ module Chalk
       @into.to_s(16, io)
       io << " " << @value
     end
+
+    def to_bin(i, index)
+        case op
+        when TokenType::OpAdd
+            return 0x7000 | (into << 8) | value
+        else
+            raise "Invalid instruction"
+        end
+    end
   end
 
   class OpRegInstruction < Instruction
@@ -62,6 +90,25 @@ module Chalk
       io << " R"
       @from.to_s(16, io)
     end
+
+    def to_bin(i, index)
+        code = 0
+        case op
+        when TokenType::OpAdd
+            code = 4
+        when TokenType::OpSub
+            code = 5
+        when TokenType::OpOr
+            code = 1
+        when TokenType::OpAnd
+            code = 2
+        when TokenType::OpXor
+            code = 3
+        else
+            raise "Invalid instruction"
+        end
+        return 0x8000 | (into << 8) | (from << 4) | code
+    end
   end
 
   class StoreInstruction < Instruction
@@ -74,6 +121,10 @@ module Chalk
       io << "store R"
       @up_to.to_s(16, io)
     end
+
+    def to_bin(i, index)
+        return 0xf055 | (up_to << 8)
+    end
   end
 
   class RestoreInstruction < Instruction
@@ -86,6 +137,10 @@ module Chalk
       io << "restore R"
       @up_to.to_s(16, io)
     end
+
+    def to_bin(i, index)
+        return 0xf065 | (up_to << 8)
+    end
   end
 
   class ReturnInstruction < Instruction
@@ -95,20 +150,9 @@ module Chalk
     def to_s(io)
       io << "return"
     end
-  end
 
-  class JumpEqInstruction < Instruction
+    def to_bin(i, index)
-    property offset : Int32
+        return 0x00ee
-    property left : Int32
-    property right : Int32
-
-    def initialize(@offset, @left, @right)
-    end
-
-    def to_s(io)
-      io << "jeq " << offset << " R"
-      @left.to_s(16, io)
-      io << " " << right
     end
   end
 
@@ -121,6 +165,10 @@ module Chalk
     def to_s(io)
       io << "jr " << @offset
     end
+
+    def to_bin(i, index)
+        return 0x1000 | ((offset + index) * 2 + 0x200)
+    end
   end
 
   class SkipEqInstruction < Instruction
@@ -135,6 +183,10 @@ module Chalk
       @left.to_s(16, io)
       io << " " << right
     end
+
+    def to_bin(i, index)
+        return 0x3000 | (left << 8) | right
+    end
   end
 
   class SkipNeInstruction < Instruction
@@ -149,6 +201,10 @@ module Chalk
       @left.to_s(16, io)
       io << " " << right
     end
+
+    def to_bin(i, index)
+        return 0x4000 | (left << 8) | right
+    end
   end
 
   class SkipRegEqInstruction < Instruction
@@ -164,6 +220,10 @@ module Chalk
       io << " R"
       @right.to_s(16, io)
     end
+
+    def to_bin(i, index)
+        return 0x5000 | (left << 8) | (right << 4)
+    end
   end
 
   class SkipRegNeInstruction < Instruction
@@ -179,6 +239,10 @@ module Chalk
       io << " R"
       @right.to_s(16, io)
     end
+
+    def to_bin(i, index)
+        return 0x9000 | (left << 8) | (right << 4)
+    end
   end
 
   class CallInstruction < Instruction
@@ -190,23 +254,20 @@ module Chalk
     def to_s(io)
       io << "call " << @name
     end
+
+    def to_bin(i, index)
+        return 0x2000 | (i.table[name]?.as(FunctionEntry).addr * 2 + 0x200)
+    end
   end
   
-  class SetIInstruction < Instruction
-    property value : Int32
-
-    def initialize(@value)
-    end
-
-    def to_s(io)
-      io << "seti " << @value
-    end
-  end
-
   class SetIStackInstruction < Instruction
     def to_s(io)
       io << "setis"
     end
+
+    def to_bin(i, index)
+        return 0xa000 | (i.stack * 2 + 0x200)
+    end
   end
 
   class AddIRegInstruction < Instruction
@@ -219,5 +280,9 @@ module Chalk
       io << "addi R"
       reg.to_s(16, io)
     end
+
+    def to_bin(i, index)
+        return 0xf000 | (reg << 8) | 0x1e
+    end
   end
 end