First stage of dynamic recompiler rewrite.

Basic IR generation calls C implementation of all instructions.
Backend generation implemented for x86, x86-64, ARM and ARM64.

src/codegen_ir.c

@@ -0,0 +1,34 @@
+#include "ibm.h"
+#include "codegen.h"
+#include "codegen_backend.h"
+#include "codegen_ir.h"
+
+static ir_data_t ir_block;
+
+ir_data_t *codegen_ir_init()
+{
+        ir_block.wr_pos = 0;
+        //pclog("codegen_ir_init\n");
+
+        return &ir_block;
+}
+
+void codegen_ir_compile(ir_data_t *ir, codeblock_t *block)
+{
+        int c;
+
+        codegen_backend_prologue(block);
+
+        for (c = 0; c < ir->wr_pos; c++)
+        {
+                uop_t *uop = &ir->uops[c];
+                
+                //pclog("uOP %i : %08x\n", c, uop->type);
+                
+                uop_handlers[uop->type & UOP_MASK](block, uop);
+        }
+
+        codegen_backend_epilogue(block);
+
+//        fatal("IR compilation complete\n");
+}