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doc/BYTECODE

@@ -3,33 +3,34 @@ Bytecode format
 
 The bytecode file is composed of the following sections:
 
- * HEADER: 16-byte header
-            [0:3]:  Magic
-            [4]:    VM format
-            [rest]: Reserved for future use
- * TABLE_OF_CONTENTS: list of 8 records pointing to each one of the sections
-            Each record (6 bytes):
-            - Pointer to section: 4 bytes
-            - Number of records in section: 2 bytes
- * [0x0] Constants indexes: pointers to each of the constant locations
-            * Table of 4-byte constant indexes with pointer to constant
-                (counter start at beginning of raw constants)
- * [0x1] Functions indexes: Pointer to functions within the code
-            [0:3]: function pointer (counter start at the beginning of executable code)
-            [4:5]: number of parameters
-            [6:7]: number of local variables
-            [8:b]: function size
- * [0x2] Constants raw data
- * [0x3] Code: executable code
- * [0x4] Debugging info
-            ???
+ * HEADER: 8-byte header
+   [0:3]: Magic
+   [4:5]: Bytecode version
+   [6:7]: Reserved for future use
+
+ * CONSTANTS
+   [0:3]: Code start address
+   [4:7]: Number of constants
+   [...]: Constant index
+   Each constant:
+     [0]: Type (0 = string, 1 = real)
+     if string:
+       [1..4]: string size
+       [...]:  string
+     if real
+       [1..4]: real
+
+ * CODE
+   Each function:
+     [0:3] Address of next function
+     [4:5] Number of parameters
+     [6:7] Number of variables
+     [...] Code
+       [0] : Opcode
+       [between 1 and 4] : Operand
 
 The max file size is 2 Gb.
 
 ## Values can be encoded in the following ways:
  * The type is defined by the operator.
- * Encoding varies according to the type:
-    int:    use protobuf format
-    float:  4-bit floating point
-    string: int-defined length, followed by the string proper - no null terminator
  * Constant indexes and function ids are encoded as ints