engine: add incomplete translator loop

Everything has been setup except for the main translation loop which
have to be done another day. Its after midnight for me right now :(

Signed-off-by: Ronald Caesar <github43132@proton.me>

CMakeLists.txt

@@ -36,6 +36,7 @@ add_library(Ballistic STATIC
     src/decoder.c
     src/decoder_table_gen.c
     src/bal_engine.c
+    src/bal_translator.c
 )
 
 target_include_directories(Ballistic PUBLIC include)

src/bal_translator.c

@@ -1,11 +1,46 @@
-#include "bal_translator.h" 
+#include "bal_translator.h"
 
 typedef struct
 {
-    bal_instruction_t     *BAL_RESTRICT instructions;
+    bal_instruction_t *BAL_RESTRICT     instructions;
-    bal_bit_width_t       *BAL_RESTRICT ssa_bit_widths;
+    bal_bit_width_t *BAL_RESTRICT       ssa_bit_widths;
     bal_source_variable_t *BAL_RESTRICT source_variables;
-    size_t                 instruction_count;
+    size_t                              instruction_count;
+    uint32_t                            max_instructions;
+    bal_error_t                         status;
 } bal_translation_context_t;
 
+bal_error_t
+bal_translate_block (bal_engine_t *BAL_RESTRICT   engine,
+                     const uint32_t *BAL_RESTRICT arm_code)
+{
+    // Copy pointers to the stack to deal with Double Indirection and Aliasing
+    // Fear.
+    //
+    bal_translation_context_t context;
+    context.instructions     = engine->instructions;
+    context.ssa_bit_widths   = engine->ssa_bit_widths;
+    context.source_variables = engine->source_variables;
+
+    // Copy other important data to `context` to keep register pressure low.
+    //
+    context.instruction_count = engine->instruction_count;
+    context.max_instructions
+        = engine->instructions_size / sizeof(bal_instruction_t);
+    context.status = BAL_SUCCESS;
+
+    for (size_t i = 0; i < context.max_instructions; ++i)
+    {
+        // TODO
+    }
+
+    // Sync back to memory. We should only write to engine once in this 
+    // function.
+    //
+    engine->instruction_count = context.instruction_count;
+    engine->status            = context.status;
+
+    return context.status;
+}
+
 /*** end of file ***/

src/bal_translator.h

@@ -17,6 +17,7 @@
 
 #include "bal_engine.h"
 #include "bal_types.h"
+#include "bal_errors.h"
 
 
 #endif /* BAL_TRANSLATOR_H */