Initial Commit

Tools/compiler/Backend.hh

@@ -0,0 +1,94 @@
+
+#include <stdio.h>
+#include <assert.h>
+
+#include "Node.hh"
+
+enum Size
+{
+   SIZE_CHAR     = 1,
+   SIZE_SHORT    = 2,
+   SIZE_LONG     = 4,
+
+   SIZE_INT      = SIZE_SHORT,
+   SIZE_POINTER  = SIZE_INT
+};
+
+extern FILE * out;
+
+class Backend
+{
+public:
+   static int  check_size(int size, const char * function);
+   static int  check_size(SUW suw,  const char * function);
+   static void file_header();
+   static void file_footer();
+
+   static void load_rr_string(int snum, int offset);
+   static void load_ll_string(int snum, int offset);
+   static void load_rr_constant(int constant);
+   static void load_ll_constant(int constant);
+
+   static void load_rr_var(const char * name, SUW suw);
+   static void load_ll_var(const char * name, SUW suw);
+   static void load_rr_var(const char * name, int sp_offset, SUW suw);
+   static void load_ll_var(const char * name, int sp_offset, SUW suw);
+
+   static void store_rr_var(const char * name, SUW suw);
+   static void store_rr_var(const char * name, int sp_offset, SUW suw);
+
+   static void load_address(const char * name);
+   static void add_address(const char * name);
+   static void load_address(const char * name, int sp_offset);
+   static void assign(int size);
+
+   static void call(const char * name);
+   static void call_ptr();
+   static void ret();
+
+   static void push_rr(SUW suw);
+   static void pop_rr (SUW suw);
+   static void pop_ll (SUW suw);
+   static void pop(int pushed);
+   static void pop_jump(int diff);
+   static void pop_return(int ret_bytes);
+   static int  push_return(int ret_bytes);
+   static void push_zero(int bytes);
+
+   static void move_rr_to_ll();
+
+   static void compute_unary(int what, const char * pretty);
+   static void compute_binary(int what, bool uns, const char * pretty);
+   static void compute_binary(int what, bool uns, const char * pretty,
+		              int value);
+   static void mult_shift(int value, bool negative);
+   static void div_shift(int value, bool negative, bool uns);
+   static void mod_and(int value, bool negative, bool uns);
+
+   static void compute_binary(int what, bool uns, int value,
+		              const char * pretty);
+   static void content(SUW suw);
+   static void scale_rr(int size);
+   static void unscale_rr(int size, bool uns);
+
+   static void asmbl(const char * asm_string);
+   static void asm_adjust(const char * asm_line);
+   static void label(int lab);
+   static void label(const char * name);
+   static void label(const char * name, int loop);
+   static void label(const char * name, int loop, int value);
+   static void branch(int lab);
+   static void branch(const char * name, int loop);
+   static void branch(const char * name);
+   static void branch_true(const char * name, int loop, int size);
+   static void branch_false(const char * name, int lab, int size);
+   static void branch_case(const char * name, int loop, int size, int value);
+   static int  GetSP()       { return stack_pointer; };
+   static int  get_label()   { return label_num++; };
+   static int  new_function(const char * fname);
+
+private:
+   static int stack_pointer;
+   static int label_num;
+   static int function_num;
+};