implemented flag for comparison result

.vscode/launch.json

@@ -7,7 +7,7 @@
             "request": "launch",
             "program": "${workspaceFolder}/bin/tcpu",
             "windows": { "program": "${workspaceFolder}/bin/tcpu.exe" },
-            "args": [ "-c", "../examples/s.tasm", "o.bin", "--debug" ],
+            "args": [ "-c", "../examples/loop.tasm", "o.bin", "--debug", "-i", "o.bin" ],
             "cwd": "${workspaceFolder}/bin",
             "preLaunchTask": "build_exec_dbg",
             "stopAtEntry": false,

README.md

@@ -3,36 +3,75 @@ Machine code interpreter written in pure C. Can execute programs up to 1 MEGABYT
 
 ## Building
 1. Install [cbuild](https://timerix.ddns.net:3322/Timerix/cbuild.git)
-2.  ```sh
+2. Install [SDL3](https://github.com/libsdl-org/SDL) and [SDL3_image](https://github.com/libsdl-org/SDL_image) from package manager or source.
+3.  ```sh
     cbuild build_exec_dbg
     ```
 
 ## Assembly language
-### Instructions
-| code | name | arguments | details |
-|------|------|-----------|---------|
-| 00 | NOP  |           | ignored instruction |
-| 01 | PUSH | `dst_register`, `value_size(bytes)`, `value` | push constant value into `dst_register` | 
-| 02 | MOV  | `dst_register`, `src_register` | copy value from `src_register` to `dst_register`
-| 03 | ADD  | `dst_register`, `src_register` | `dst` += `src` |
-| 04 | SUB  | `dst_register`, `src_register` | `dst` -= `src` |
-| 05 | MUL  | `dst_register`, `src_register` | `dst` *= `src` |
-| 06 | DIV  | `dst_register`, `src_register` | `dst` /= `src` |
-| 07 | MOD  | `dst_register`, `src_register` | `dst` %= `src` |
-| 08 | SYS  |           | call system function |
-| 09 | EXIT |           | stop the program with exit code in `ax` |
-
 ### Registers
-| code | name | size (bits) |
-|------|------|-------------|
-| 00 | ax | 32 |
-| 01 | bx | 32 |
-| 02 | cx | 32 |
-| 03 | dx | 32 |
+| name | code | size (bits) |
+|-----|------|----|
+| rax | 0x01 | 64 |
+| eax | 0x02 | 32 |
+| ax  | 0x04 | 16 |
+| al  | 0x07 | 8  |
+| ah  | 0x08 | 8  |
+|                 |
+| rbx | 0x11 | 64 |
+| ebx | 0x12 | 32 |
+| bx  | 0x14 | 16 |
+| bl  | 0x17 | 8  |
+| bh  | 0x18 | 8  |
+|                 |
+| rcx | 0x21 | 64 |
+| ecx | 0x22 | 32 |
+| cx  | 0x24 | 16 |
+| cl  | 0x27 | 8  |
+| ch  | 0x28 | 8  |
+|                 |
+| rdx | 0x31 | 64 |
+| edx | 0x32 | 32 |
+| dx  | 0x34 | 16 |
+| dl  | 0x37 | 8  |
+| dh  | 0x38 | 8  |
+
+### Instructions
+| name | arguments | details |
+|------|-----------|---------|
+| NOP  |           | ignored instruction |
+| EXIT |           | stop the program with exit code in `eax` |
+| SYS  |           | call system function |
+|                            |
+| MOVC | `dst_register`, `const_value` | push constant value into `dst_register` | 
+| MOVR | `dst_register`, `src_register` | copy value from `src_register` to `dst_register` |
+|                            |
+| ADD | `dst_register`, `src_register` | `dst += src` |
+| SUB | `dst_register`, `src_register` | `dst -= src` |
+| MUL | `dst_register`, `src_register` | `dst *= src` |
+| DIV | `dst_register`, `src_register` | `dst /= src` |
+| MOD | `dst_register`, `src_register` | `dst %= src` |
+|                            |
+| EQ | `dst_register`, `src_register` | `cmp_flag = dst == src` |
+| NE | `dst_register`, `src_register` | `cmp_flag = dst != src` |
+| LT | `dst_register`, `src_register` | `cmp_flag = dst <  src` |
+| LE | `dst_register`, `src_register` | `cmp_flag = dst <= src` |
+| GT | `dst_register`, `src_register` | `cmp_flag = dst >  src` |
+| GE | `dst_register`, `src_register` | `cmp_flag = dst >= src` |
+|                            |
+| NOT | `dst_register` | `dst = !dst` |
+| INV | `dst_register` | `dst = ~dst` |
+| OR  | `dst_register`, `src_register` | `dst = dst \| src` |
+| XOR | `dst_register`, `src_register` | `dst = dst ^ src` |
+| AND | `dst_register`, `src_register` | `dst = dst & src` |
+|                            |
+| JMP | `dst_address_const` | goto `dst` |
+| JNZ | `dst_address_const` | if (`cmp_flag` != 0) goto `dst` |
+| JZ  | `dst_address_const` | if (`cmp_flag` == 0) goto `dst` |
 
 ### System functions
 To call a system function you need to push values to registers and write `SYS` opcode. The return value of a function will will be avaliable in `ax` after call.
-| `ax` | name | `bx` | `cx` | `dx` | details |
-|-----------|------|----|----|----|---------|
-| 0 | read  | file number | buffer pointer | buffer size | read data from file |
-| 1 | write | file number | buffer pointer | buffer size | write data to file |
+| name | `al` | `ah` | `rbx` | `ecx` | details |
+|------|------|------|-------|-------|---------|
+| read  | 0 | file number | buffer pointer | buffer size | read data from file |
+| write | 1 | file number | buffer pointer | buffer size | write data to file |

TODO.md

@@ -0,0 +1,11 @@
+# TODO List
+- add negative number arguments support
+- add movc char support
+- add padding to compilation
+- VM debug log
+- add display syscalls
+- change section binary format:
+    1. code
+    2. exit instruction with code ERR_U_FORGOT_TO_CALL_EXIT
+    3. data
+- arguments validation for each instruction

examples/conditional_jump.tasm

@@ -0,0 +1,32 @@
+/*
+Example of behavior change depending on some condition
+*/
+
+.main:
+movc ax 1
+movc bx 2
+gt ax bx
+jnz @true
+jz @false
+
+.true:
+const8 true.msg "true\n"
+movc rbx @true.msg
+movc ecx #true.msg
+jmp @print
+
+.false
+const8 false.msg "false\n"
+movc rbx @false.msg
+movc ecx #false.msg
+jmp @print
+
+.print:
+movc al 1
+movc ah 1
+sys
+jmp @end
+
+.end:
+movc ax 0
+exit

examples/loop.tasm

@@ -0,0 +1,22 @@
+/*
+Example of self-repeating code section
+*/
+
+.main:
+movc dx 0; // loop counter
+
+.loop
+const8 datum "ITERATION!!! "
+movc al 1
+movc ah 1
+movc rbx @datum
+movc ecx #datum
+sys
+
+movc cx 1
+add dx cx
+movc cx 8
+lt dx cx
+jnz @loop
+movc rax 0
+exit

examples/s.tasm

@@ -1,16 +0,0 @@
-/*
-"hello world" program in my assembly language
-*/
-
-.data:
-// named array of 8-bit values
-const8 msg "Hello, World :3\0"
-
-.main:
-push ax 1; // sys_write
-push bx 1; // stdout
-push cx @msg; // address of msg data
-push dx #msg; // size of msg data
-sys
-push ax 0
-exit

examples/stdout.tasm

@@ -0,0 +1,16 @@
+/*
+"hello world" program in my assembly language
+*/
+
+.data:
+// named array of 8-bit values
+const8 msg "Hello, World!\n"
+
+.main:
+movc al 1; // sys_write
+movc ah 1; // stdout
+movc rbx @msg; // address of msg data
+movc ecx #msg; // size of msg data
+sys
+movc ax 0
+exit

examples/window.tasm

@@ -0,0 +1,7 @@
+/*
+Example of graphical application
+*/
+
+.main:
+//TODO: write code here
+exit

project.config

@@ -32,12 +32,13 @@ case "$OS" in
     WINDOWS)
         EXEC_FILE="$PROJECT.exe"
         SHARED_LIB_FILE="$PROJECT.dll"
-        # example: "-I./"
+        LINKER_LIBS="-lSDL3_image -lSDL3"
         INCLUDE=""
         ;;
     LINUX)
         EXEC_FILE="$PROJECT"
         SHARED_LIB_FILE="$PROJECT.so"
+        LINKER_LIBS="-lSDL3_image -lSDL3"
         INCLUDE=""
         ;;
     *)
@@ -57,7 +58,7 @@ case "$TASK" in
         # -fdata-sections -ffunction-sections -Wl,--gc-sections  removes unused code
         C_ARGS="-O2 -flto=auto -fuse-linker-plugin -fprofile-use -fprofile-prefix-path=$(realpath $OBJDIR)/objects -fdata-sections -ffunction-sections -Wl,--gc-sections"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=
         TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         POST_TASK_SCRIPT=
@@ -66,7 +67,7 @@ case "$TASK" in
     build_exec_dbg)
         C_ARGS="-O0 -g3"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=
         TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         POST_TASK_SCRIPT=
@@ -75,7 +76,7 @@ case "$TASK" in
     build_shared_lib)
         C_ARGS="-O2 -fpic -flto -shared"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS -Wl,-soname,$SHARED_LIB_FILE"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS -Wl,-soname,$SHARED_LIB_FILE"
         PRE_TASK_SCRIPT=
         TASK_SCRIPT=cbuild/default_tasks/build_shared_lib.sh
         POST_TASK_SCRIPT=
@@ -84,7 +85,7 @@ case "$TASK" in
     build_shared_lib_dbg)
         C_ARGS="-O0 -g3 -fpic -shared"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS -Wl,-soname,$SHARED_LIB_FILE"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS -Wl,-soname,$SHARED_LIB_FILE"
         PRE_TASK_SCRIPT=
         TASK_SCRIPT=cbuild/default_tasks/build_shared_lib.sh
         POST_TASK_SCRIPT=
@@ -125,7 +126,7 @@ case "$TASK" in
         # -fprofile-prefix-path sets path where profiling info about objects will be saved
         C_ARGS="-O2 -flto=auto -fuse-linker-plugin -fprofile-generate -fprofile-prefix-path=$(realpath $OBJDIR)/objects"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         TASK_SCRIPT=cbuild/default_tasks/profile.sh
         POST_TASK_SCRIPT=
@@ -138,7 +139,7 @@ case "$TASK" in
         # -pg adds code to executable, that generates file containing function call info (gmon.out)
         C_ARGS="-O2 -flto=auto -fuse-linker-plugin -pg"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         TASK_SCRIPT=cbuild/default_tasks/gprof.sh
         POST_TASK_SCRIPT=
@@ -152,7 +153,7 @@ case "$TASK" in
         # -pg adds code to executable, that generates file containing function call info (gmon.out)
         C_ARGS="-O2 -flto=auto -fuse-linker-plugin"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         TASK_SCRIPT=cbuild/default_tasks/callgrind.sh
         POST_TASK_SCRIPT=
@@ -162,7 +163,7 @@ case "$TASK" in
         OUTDIR="$OUTDIR/sanitize"
         C_ARGS="-O0 -g3 -fsanitize=undefined,address"
         CPP_ARGS="$C_ARGS"
-        LINKER_ARGS="$CPP_ARGS"
+        LINKER_ARGS="$CPP_ARGS $LINKER_LIBS"
         PRE_TASK_SCRIPT=cbuild/default_tasks/build_exec.sh
         TASK_SCRIPT=cbuild/default_tasks/exec.sh
         POST_TASK_SCRIPT=

src/VM/Display/Display.c

@@ -0,0 +1,90 @@
+#include <SDL3/SDL.h>
+#include <SDL3_image/SDL_image.h>
+#include "Display.h"
+
+typedef struct Display {
+    str name;
+    i32 width;
+    i32 height;
+    SDL_Window* window;
+    SDL_Renderer* renderer;
+} Display;
+
+static SDL_InitState sdl_init_state = {0};
+
+
+Display* Display_create(str name, i32 w, i32 h, DisplayFlags flags){
+    Display* d = malloc(sizeof(Display));
+
+    d->name = str_copy(name);
+    d->width = w;
+    d->height = h;
+    d->window = NULL;
+    d->renderer = NULL;
+
+    if (SDL_ShouldInit(&sdl_init_state)) {
+        bool sdl_initialized = SDL_Init(SDL_INIT_VIDEO);
+        SDL_SetInitialized(&sdl_init_state, sdl_initialized);
+        if(!sdl_initialized)
+            return false;
+    }
+
+    SDL_WindowFlags window_flags = SDL_WINDOW_ALWAYS_ON_TOP;
+    if(!SDL_CreateWindowAndRenderer(d->name.data, d->width, d->height, window_flags, &d->window, &d->renderer)){
+        return false;
+    }
+
+    return d;
+}
+
+void Display_destroy(Display* d){
+    free(d->name.data);
+    SDL_DestroyRenderer(d->renderer);
+    SDL_DestroyWindow(d->window);
+    free(d);
+
+    // if (SDL_ShouldQuit(&sdl_init_state)) {
+    //     SDL_Quit();
+    //     SDL_SetInitialized(&sdl_init_state, false);
+    // }
+}
+
+bool Display_setName(Display* d, str name){
+    d->name = str_copy(name);
+    return SDL_SetWindowTitle(d->window, name.data);
+}
+
+bool Display_setSize(Display* d, u32 w, u32 h){
+    d->width = w;
+    d->height = h;
+    return SDL_SetWindowSize(d->window, w, h);
+}
+
+bool Display_setDrawingColor(Display* d, ColorRGBA color){
+    return SDL_SetRenderDrawColor(d->renderer, color.r, color.g, color.b, color.a);
+}
+
+bool Display_clear(Display* d){
+    return SDL_RenderClear(d->renderer);
+}
+
+#define Rect_copy(DST, SRC) {\
+    DST.x = SRC.x;\
+    DST.y = SRC.y;\
+    DST.w = SRC.w;\
+    DST.h = SRC.h;\
+}
+
+bool Display_fillRect(Display* d, Rect rect) {
+    SDL_FRect sdl_rect;
+    Rect_copy(sdl_rect, rect);
+    return SDL_RenderFillRect(d->renderer, &sdl_rect);
+}
+
+bool Display_swapBuffers(Display* d){
+    return SDL_RenderPresent(d->renderer);
+}
+
+NULLABLE(cstr) Display_getError(){
+    return SDL_GetError();
+}

src/VM/Display/Display.h

@@ -0,0 +1,32 @@
+#pragma once
+#include "../../std.h"
+#include "../../string/str.h"
+
+typedef struct Rect {
+    i32 x, y;
+    i32 w, h;
+} Rect;
+#define Rect_create(X, Y, W, H) ((Rect){ .x = X, .y = Y, .w = W, .h = H})
+
+typedef struct ColorRGBA {
+    u8 r, g, b, a;
+} ColorRGBA;
+#define ColorRGBA_create(R, G, B, A) ((ColorRGBA){ .r = R, .g = G, .b = B, .a = A })
+
+
+typedef enum DisplayFlags {
+    DisplayFlags_Default = 0
+} DisplayFlags;
+
+typedef struct Display Display;
+
+Display* Display_create(str name, i32 w, i32 h, DisplayFlags flags);
+void Display_destroy(Display* d);
+
+bool Display_setName(Display* d, str name);
+bool Display_setSize(Display* d, u32 w, u32 h);
+bool Display_setDrawingColor(Display* d, ColorRGBA color);
+bool Display_clear(Display* d);
+bool Display_fillRect(Display* d, Rect rect);
+bool Display_swapBuffers(Display* d);
+NULLABLE(cstr) Display_getError();

src/VM/VM.c

@@ -50,7 +50,7 @@ i32 VM_boot(VM* vm){
         u8 opcode = vm->data[vm->current_pos];
 
         const Instruction* instr = Instruction_getByOpcode(opcode);
-        // printfe("[at 0x%x] %02X %s\n", (u32)vm->current_pos, opcode, instr->name);
+        // printfe("[at 0x%x] %02X %s\n", (u32)vm->current_pos, opcode, instr->name.data);
         if(instr == NULL){
             VM_setError(vm, "unknown opcode %02X", opcode);
             return -1;
@@ -60,7 +60,7 @@ i32 VM_boot(VM* vm){
         i32 bytes_read = instr->implementation(vm);
         // internal error occured
         if(bytes_read < 0)
-            return -1;
+            return bytes_read;
         
         if(vm->state == VMState_Exited)
             break;
@@ -72,7 +72,7 @@ i32 VM_boot(VM* vm){
     }
 
     // exit code of the program should be in ax register
-    return vm->ax.i32v;
+    return vm->registers.a.ex;
 }
 
 bool VM_dataRead(VM* vm, void* dst, size_t pos, size_t size){
@@ -84,6 +84,25 @@ bool VM_dataRead(VM* vm, void* dst, size_t pos, size_t size){
         return false;
     }
 
-    memcpy(dst, vm->data + pos, size);
+    void* addr = vm->data + pos;
+    memcpy(dst, addr, size);
     return true;
 }
+
+void VM_registerRead(VM* vm, void* dst, RegisterCode code) {
+    u8 index = code / 0x10;
+    u8 part = code & 0xf;
+    u8 offset = part / 8;
+    u8 size = 8 / part;
+    void* addr = (u8*)(&vm->registers.array[index]) + offset;
+    memcpy(dst, addr, size);
+}
+
+void VM_registerWrite(VM* vm, void* src, RegisterCode code){
+    u8 index = code / 0x10;
+    u8 part = code & 0xf;
+    u8 offset = part / 8;
+    u8 size = 8 / part;
+    void* addr = (u8*)(&vm->registers.array[index]) + offset;
+    memcpy(addr, src, size);
+}

src/VM/VM.h

@@ -1,30 +1,15 @@
 #pragma once
 #include "../std.h"
 #include "../string/str.h"
+#include "../instructions/registers.h"
 
 typedef union Register {
-    u32 u32v;
-    i32 i32v;
-    f32 f32v;
+    u64 rx;
+    u32 ex;
+    u16 x;
     struct { 
-        u16 u16v0;
-        u16 u16v1;
-    };
-    struct {
-        i16 i16v0;
-        i16 i16v1;
-    };
-    struct { 
-        u8 u8v0;
-        u8 u8v1;
-        u8 u8v2;
-        u8 u8v3;
-    };
-    struct { 
-        i8 i8v0;
-        i8 i8v1;
-        i8 i8v2;
-        i8 i8v3;
+        u8 l;
+        u8 h;
     };
 } Register;
 
@@ -38,13 +23,17 @@ typedef enum VMState {
 typedef struct VM {
     union {
         struct {
-            Register ax;
-            Register bx;
-            Register cx;
-            Register dx;
+            Register a;
+            Register b;
+            Register c;
+            Register d;
         };
-        Register registers[4];
-    };
+        Register array[4];
+    } registers;
+
+    struct {
+        bool cmp; // result of comparison operation
+    } flags;
     
     VMState state;
     char* NULLABLE(error_message); // not null on if state == VMState_InternalError
@@ -66,6 +55,8 @@ bool VM_setMemory(VM* vm, u8* data, size_t size);
 i32 VM_boot(VM* vm);
 
 bool VM_dataRead(VM* vm, void* dst, size_t pos, size_t size);
+void VM_registerRead(VM* vm, void* dst, RegisterCode code);
+void VM_registerWrite(VM* vm, void* src, RegisterCode code);
 
 #define VM_setError(vm, format, ...) _VM_setError(vm, __func__, format ,##__VA_ARGS__)
 void _VM_setError(VM* vm, cstr context, cstr format, ...) __attribute__((__format__(__printf__, 3, 4)));

src/VM/time.c

@@ -0,0 +1,18 @@
+#include <SDL3/SDL_timer.h>
+#include "time.h"
+
+void time_sleepMS(u32 ms){
+    SDL_Delay(ms);
+}
+
+void time_sleepNS(u64 ns){
+    SDL_DelayNS(ns);
+}
+
+u64 time_getMonotonicMS(){
+    return SDL_GetTicks();
+}
+
+u64 time_getMonotonicNS(){
+    return SDL_GetTicksNS();
+}

src/VM/time.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include "../std.h"
+
+void time_sleepMS(u32 ms);
+void time_sleepNS(u64 ns);
+u64 time_getMonotonicMS();
+u64 time_getMonotonicNS();

src/compiler/Binary.c

@@ -27,6 +27,8 @@ void BinaryObject_construct(BinaryObject* ptr){
     ptr->section_list = List_CompiledSection_alloc(64);
     HashMap_CompiledSectionPtr_alloc(&ptr->section_map);
     HashMap_ConstDataProps_alloc(&ptr->const_data_map);
+    ptr->main_section = NULL;
+    ptr->total_size = 0;
 }
 
 void BinaryObject_free(BinaryObject* ptr){

src/compiler/Binary.h

@@ -57,6 +57,7 @@ HashMap_declare(CompiledSectionPtr);
 typedef struct BinaryObject {
     List_CompiledSection section_list;
     HashMap_CompiledSectionPtr section_map;
+    NULLABLE(CompiledSection*) main_section; 
     HashMap_ConstDataProps const_data_map;
     u32 total_size;
 } BinaryObject;

src/compiler/Compiler.c

@@ -68,7 +68,7 @@ static bool compileSection(Compiler* cmp, Section* sec){
     CompiledSection* cs = List_CompiledSection_expand(&cmp->binary.section_list, 1);
     CompiledSection_construct(cs, sec->name);
     if(!HashMap_CompiledSectionPtr_tryPush(&cmp->binary.section_map, cs->name, cs)){
-        returnError("duplicate section '%s'", str_copy(sec->name));
+        returnError("duplicate section '%s'", str_copy(sec->name).data);
     }
 
     // compile code
@@ -90,22 +90,21 @@ static bool compileSection(Compiler* cmp, Section* sec){
                     List_u8_push(&cs->bytes, arg->value.register_code);
                     break;
                 case ArgumentType_ConstValue:
-                    //TODO: add const value size parsing
-                    List_u8_pushMany(&cs->bytes, (void*)&arg->value.i, 4);
+                    List_u8_pushMany(&cs->bytes, (void*)&arg->value.i, 8);
                     break;
                 case ArgumentType_ConstDataPointer:
                     List_NamedRef_push(&cs->named_refs, NamedRef_construct(
                             arg->value.data_name, 
                             NamedRefType_Ptr, 
                             cs->bytes.len));
-                    List_u8_pushMany(&cs->bytes, zeroes, 4);
+                    List_u8_pushMany(&cs->bytes, zeroes, 8);
                     break;
                 case ArgumentType_ConstDataSize:
                     List_NamedRef_push(&cs->named_refs, NamedRef_construct(
                             arg->value.data_name, 
                             NamedRefType_Size, 
                             cs->bytes.len));
-                    List_u8_pushMany(&cs->bytes, zeroes, 4);
+                    List_u8_pushMany(&cs->bytes, zeroes, 8);
                     break;
             }
         }
@@ -124,6 +123,9 @@ static bool compileSection(Compiler* cmp, Section* sec){
 }
 
 static bool compileBinary(Compiler* cmp){
+    returnErrorIf_auto(cmp->state != CompilerState_Parsing);
+    cmp->state = CompilerState_Compiling;
+
     for(u32 i = 0; i < cmp->ast.sections.len; i++){
         SectionPtr sec = &cmp->ast.sections.data[i];
         if(!compileSection(cmp, sec)){
@@ -137,6 +139,7 @@ static bool compileBinary(Compiler* cmp){
     if(main_sec_ptrptr == NULL){
         returnError("no 'main' section was defined");
     }
+    cmp->binary.main_section = *main_sec_ptrptr;
 
     // create linked list of CompiledSection where main is the first    
     CompiledSection* prev_sec = *main_sec_ptrptr;
@@ -144,10 +147,10 @@ static bool compileBinary(Compiler* cmp){
     for(u32 i = 0; i < cmp->binary.section_list.len; i++){
         CompiledSection* sec = &cmp->binary.section_list.data[i];
         total_size += sec->bytes.len;
-        if(str_equals(sec->name, main_sec_name))
-           continue;
-        prev_sec->next = sec;
-        sec->offset = prev_sec->offset + prev_sec->bytes.len;
+        bool is_main_sec = str_equals(sec->name, main_sec_name);
+        if(!is_main_sec){
+            sec->offset = prev_sec->offset + prev_sec->bytes.len;
+        }
 
         ConstDataProps cd = ConstDataProps_construct(sec->name, sec->bytes.len, sec->offset);
         if(!HashMap_ConstDataProps_tryPush(&cmp->binary.const_data_map, cd.name, cd)){
@@ -160,6 +163,11 @@ static bool compileBinary(Compiler* cmp){
                 returnError("duplicate named data '%s'", str_copy(cd.name).data);
             }
         }
+
+        if(is_main_sec)
+           continue;
+        prev_sec->next = sec;
+        prev_sec = sec;
     }
 
     // insert calculated offsets into sections
@@ -174,16 +182,15 @@ static bool compileBinary(Compiler* cmp){
                 returnError("can't find named data '%s'", str_copy(ref->name).data);
             }
 
-            void* ref_value_ptr = sec->bytes.data + ref->offset;
-            
+            u64* ref_value_ptr = (void*)(sec->bytes.data + ref->offset);
             switch(ref->type){
                 default:
                     returnError("invalid NamedRefType %i", ref->type);
                 case NamedRefType_Size:
-                    *((u32*)ref_value_ptr) = target_data->size;
+                    *ref_value_ptr = target_data->size;
                     break;
                 case NamedRefType_Ptr:
-                    *((u32*)ref_value_ptr) = target_data->offset;
+                    *ref_value_ptr = target_data->offset;
                     break;
             }
         } 
@@ -194,26 +201,16 @@ static bool compileBinary(Compiler* cmp){
 }
 
 static bool writeBinaryFile(Compiler* cmp, FILE* f){
-    returnErrorIf_auto(cmp->state != CompilerState_Parsing);
-    cmp->state = CompilerState_Compiling;
+    returnErrorIf_auto(cmp->state != CompilerState_Compiling);
 
-    if(!compileBinary(cmp)){
-        return false;
-    }    
-
-    
-    CompiledSection** main_sec_ptrptr = HashMap_CompiledSectionPtr_tryGetPtr(&cmp->binary.section_map, STR("main"));
-    if(main_sec_ptrptr == NULL){
-        returnError("no 'main' section was defined");
-    }
-    CompiledSection* sec = *main_sec_ptrptr;
+    CompiledSection* sec = cmp->binary.main_section;
     while(sec){
         fwrite(sec->bytes.data, 1, sec->bytes.len, f);
+        fflush(f);
         sec = sec->next;
     }
 
     //TODO: print warnings for unused sections
-
     return true;
 }
 
@@ -289,6 +286,7 @@ bool Compiler_compile(Compiler* cmp, cstr source_file_name, cstr out_file_name,
     if(debug_log)
         printf("===================================[parsing]===================================\n");
     success = Compiler_parse(cmp);
+
     if (debug_log){
         printf("-------------------------------------[AST]-------------------------------------\n");
         for(u32 i = 0; i < cmp->ast.sections.len; i++){
@@ -308,6 +306,11 @@ bool Compiler_compile(Compiler* cmp, cstr source_file_name, cstr out_file_name,
             for(u32 j = 0; j < sec->code.len; j++){
                 Operation* op = &sec->code.data[j];
                 const Instruction* instr = Instruction_getByOpcode(op->opcode);
+                if(instr == NULL){
+                    fclose(f);
+                    returnError("unknown opcode: %i", op->opcode)
+                }
+
                 printf("    %s", instr->name.data);
                 for(u32 k = 0; k < op->args.len; k++){
                     Argument* arg = &op->args.data[k];
@@ -318,8 +321,9 @@ bool Compiler_compile(Compiler* cmp, cstr source_file_name, cstr out_file_name,
                             fclose(f);
                             returnError("invalid argument type %i", arg->type);
                         case ArgumentType_Register:
-                            const char* register_names[] = {"null", "ax", "bx", "cx", "dx"};
-                            printf("%s", register_names[arg->value.register_code]);
+                            str register_name = RegisterCode_toString(arg->value.register_code);
+                            printf("%s 0x%x", register_name.data, arg->value.register_code);
+                            free(register_name.data);
                             break;
                         case ArgumentType_ConstValue:
                             printf(IFWIN("%lli", "%li"), arg->value.i);
@@ -348,6 +352,7 @@ bool Compiler_compile(Compiler* cmp, cstr source_file_name, cstr out_file_name,
             }
         }
     }
+
     if(!success){
         fclose(f);
         return false;
@@ -355,6 +360,25 @@ bool Compiler_compile(Compiler* cmp, cstr source_file_name, cstr out_file_name,
 
     if(debug_log)
         printf("==================================[compiling]==================================\n");
+    success = compileBinary(cmp);
+
+    if(debug_log){
+        for(u32 i = 0; i < cmp->binary.section_list.len; i++){
+            CompiledSection* sec = &cmp->binary.section_list.data[i];
+            str tmpstr = str_copy(sec->name);
+            printf("compiled section '%s' to %u bytes with offset 0x%x\n", tmpstr.data, sec->bytes.len, sec->offset);
+            free(tmpstr.data);
+        }
+    }
+    
+    if(!success){
+        fclose(f);
+        return false;
+    }
+    
+    
+    if(debug_log)
+        printf("----------------------------[writing output to file]---------------------------\n");
     success = writeBinaryFile(cmp, f);
     fclose(f);
     if(success){

src/compiler/Lexer.c

@@ -130,7 +130,7 @@ static void readArguments(Compiler* cmp){
 
         // string argument reading
         if(quot != '\0'){
-            if(c == quot && cmp->code.data[cmp->pos - 1] != '\\'){
+            if(c == quot && (cmp->code.data[cmp->pos - 1] != '\\' || cmp->code.data[cmp->pos - 2] == '\\')){
                 quot = '\0';
             }
             else if(c == '\r' || c == '\n'){

src/compiler/Parser.c

@@ -44,7 +44,8 @@ static NULLABLE(str) resolveEscapeSequences(Compiler* cmp, str src){
         c = src.data[i];
         if(c == '\\'){
             escaped = !escaped;
-            continue;
+            if(escaped)
+                continue;
         }
         
         if(!escaped){
@@ -69,11 +70,17 @@ static NULLABLE(str) resolveEscapeSequences(Compiler* cmp, str src){
             case 'e':
                 StringBuilder_append_char(&sb, '\e');
                 break;
+            case '"':
+            case '\'':
+                StringBuilder_append_char(&sb, c);
+                break;
             default:
                 setError_unexpectedTokenChar(cmp->tokens.data[cmp->tok_i], i);
                 StringBuilder_free(&sb);
                 return str_null;
         }
+
+        escaped = false;
     }
 
     return StringBuilder_getStr(&sb);
@@ -259,10 +266,12 @@ bool Compiler_parse(Compiler* cmp){
                 // data definition starts with const
                 if(str_startsWith(instr_name, STR("const"))){
                     DataDefinition* dataDefPtr = List_DataDefinition_expand(&sec->data, 1);
+                    memset(dataDefPtr, 0, sizeof(DataDefinition));
                     parseDataDefinition(cmp, instr_name, dataDefPtr);
                 }
                 else {
                     Operation* operPtr = List_Operation_expand(&sec->code, 1);
+                    memset(operPtr, 0, sizeof(Operation));
                     parseOperation(cmp, instr_name, operPtr);
                 }
                 break;

src/instructions/impl/JMP.c

@@ -0,0 +1,36 @@
+#include "impl_macros.h"
+
+// JUMP [destination address]
+i32 JMP_impl(VM* vm){
+    u64 dst_addr = 0;
+    readVar(dst_addr);
+
+    vm->current_pos = dst_addr;
+
+    return sizeof(dst_addr);
+}
+
+
+// JNZ [destination address]
+i32 JNZ_impl(VM* vm){
+    u64 dst_addr = 0;
+    readVar(dst_addr);
+    
+    if(vm->flags.cmp != 0){
+        vm->current_pos = dst_addr;
+    }
+    
+    return sizeof(dst_addr);
+}
+
+// JZ [destination address]
+i32 JZ_impl(VM* vm){
+    u64 dst_addr = 0;
+    readVar(dst_addr);
+
+    if(vm->flags.cmp == 0){
+        vm->current_pos = dst_addr;
+    }
+    
+    return sizeof(dst_addr);
+}

src/instructions/impl/MOV.c

@@ -1,16 +0,0 @@
-#include "impl_macros.h"
-
-/// MOV [dst_register] [src_register]
-i32 MOV_impl(VM* vm){
-    u8 dst_register_i = 0;
-    readRegisterVar(dst_register_i);
-    u8 src_register_i = 0;
-    readRegisterVar(src_register_i);
-    if(dst_register_i == src_register_i){
-        VM_setError(vm, "dst_register_i == src_register_i (%x) ", src_register_i);
-        return -1;
-    }
-
-    vm->registers[dst_register_i].u32v = vm->registers[src_register_i].u32v;
-    return sizeof(dst_register_i) + sizeof(src_register_i);
-}

src/instructions/impl/MOVC.c

@@ -0,0 +1,12 @@
+#include "impl_macros.h"
+
+/// MOVC [dst_register] [value_size] [value]
+i32 MOVC_impl(VM* vm){
+    RegisterCode dst_reg_code = 0;
+    readRegisterCode(dst_reg_code);
+    u64 const_value = 0;
+    readVar(const_value);
+    
+    VM_registerWrite(vm, &const_value, dst_reg_code);
+    return sizeof(dst_reg_code) + sizeof(const_value);
+}

src/instructions/impl/MOVR.c

@@ -0,0 +1,17 @@
+#include "impl_macros.h"
+
+/// MOVR [dst_register] [src_register]
+i32 MOVR_impl(VM* vm){
+    RegisterCode dst_reg_code = 0, src_reg_code = 0;
+    readRegisterCode(dst_reg_code);
+    readRegisterCode(src_reg_code);
+    if(dst_reg_code == src_reg_code){
+        VM_setError(vm, "dst_reg_code == src_reg_code (%x) ", src_reg_code);
+        return -1;
+    }
+
+    u64 src_reg_value = 0;
+    VM_registerRead(vm, &src_reg_value, src_reg_code);
+    VM_registerWrite(vm, &src_reg_value, dst_reg_code);
+    return sizeof(dst_reg_code) + sizeof(src_reg_code);
+}

src/instructions/impl/PUSH.c

@@ -1,17 +0,0 @@
-#include "impl_macros.h"
-
-/// PUSH [dst_register] [value_size] [value]
-i32 PUSH_impl(VM* vm){
-    u8 dst_register_i = 0;
-    readRegisterVar(dst_register_i);
-    /*u8 value_size = 0;
-    readValueSizeVar(value_size);*/
-    u8 value_size = 4;\
-    
-    vm->registers[dst_register_i].u32v = 0;
-    if(!VM_dataRead(vm, &vm->registers[dst_register_i].u32v, vm->current_pos, value_size))
-        return -1;
-    vm->current_pos += value_size;
-
-    return sizeof(dst_register_i) + sizeof(value_size) + value_size;
-}

src/instructions/impl/SYS.c

@@ -1,6 +1,6 @@
 #include "impl_macros.h"
 
-FILE* NULLABLE(fileFromN)(VM* vm, u32 file_n){
+FILE* NULLABLE(fileFromN)(VM* vm, u8 file_n){
     FILE* f = NULL;
     switch(file_n){
         case 0: f = stdin; break;
@@ -15,13 +15,13 @@ FILE* NULLABLE(fileFromN)(VM* vm, u32 file_n){
 }
 
 // sys_read
-// bx - file n
-// cx - buffer ptr
-// dx - buffer size
+// ah - file n
+// rbx - buffer ptr
+// ecx - buffer size
 i32 SYS_read(VM* vm){
-    const u32 file_n = vm->bx.u32v;
-    u8* const buf = vm->data + vm->cx.u32v;
-    const u32 size = vm->dx.u32v;
+    const u8 file_n = vm->registers.a.h;
+    u8* const buf = vm->data + vm->registers.b.rx;
+    const u32 size = vm->registers.c.ex;
 
     if(buf + size > vm->data + vm->data_size)
         return 40;
@@ -31,13 +31,13 @@ i32 SYS_read(VM* vm){
 }
 
 // sys_write
-// bx - file n
-// cx - buffer ptr
-// dx - buffer size
+// ah - file n
+// rbx - buffer ptr
+// ecx - buffer size
 i32 SYS_write(VM* vm){
-    const u32 file_n = vm->bx.u32v;
-    u8* const buf = vm->data + vm->cx.u32v;
-    const u32 size = vm->dx.u32v;
+    const u8 file_n = vm->registers.a.h;
+    u8* const buf = vm->data + vm->registers.b.rx;
+    const u32 size = vm->registers.c.ex;
 
     if(buf + size > vm->data + vm->data_size)
         return 41;
@@ -47,16 +47,16 @@ i32 SYS_write(VM* vm){
 }
 
 /// SYS
-/// before call: ax - func code
-/// after  call: ax - result code
+/// before call: al - func code
+/// after  call: eax - result code
 i32 SYS_impl(VM* vm){
-    u8 func_code = vm->ax.u8v0;
-    u32 result_code = 0;
+    u8 func_code = vm->registers.a.l;
+    i32 result_code = 0;
     switch(func_code){
         case 0:
             result_code = SYS_read(vm);
             break;
-        case 1:;
+        case 1:
             result_code = SYS_write(vm);
             break;
         default:
@@ -64,6 +64,6 @@ i32 SYS_impl(VM* vm){
             return -1;
     }
 
-    vm->ax.u32v = result_code;
+    vm->registers.a.ex = result_code;
     return 0;
 }

src/instructions/impl/impl_macros.h

@@ -8,29 +8,52 @@
     vm->current_pos += sizeof(VAR);\
 }
 
-#define validateRegisterIndex(VAR) {\
-    if(VAR> sizeof(vm->registers)){\
+#define validateRegisterCode(VAR) \
+    if(VAR == RegisterCode_Unset || VAR > RegisterCode_dh){\
         VM_setError(vm, "invalid register index (%x)", VAR);\
         return -1;\
-    }\
-}
+    }
 
-#define readRegisterVar(VAR) {\
+#define readRegisterCode(VAR) {\
     readVar(VAR);\
-    VAR -= 1;\
-    validateRegisterIndex(VAR);\
+    validateRegisterCode(VAR);\
 }
 
-/*
-#define validateValueSize(VAR) {\
-    if(VAR < 1 || VAR > 4){\
-        VM_setError(vm, "invalid value_size (%x)", VAR);\
-        return -1;\
-    }\
+#define OPERATOR_IMPL_1(NAME, OPERATOR)\
+i32 NAME##_impl (VM* vm) {\
+    RegisterCode dst_reg_code = 0;\
+    readRegisterCode(dst_reg_code);\
+    u64 dst_reg_value = 0;\
+    VM_registerRead(vm, &dst_reg_value, dst_reg_code);\
+    \
+    dst_reg_value = OPERATOR dst_reg_value;\
+    VM_registerWrite(vm, &dst_reg_value, dst_reg_code);\
+    return sizeof(dst_reg_code);\
 }
 
-#define readValueSizeVar(VAR) {\
-    readVar(VAR);\
-    validateValueSize(VAR);\
+#define OPERATOR_IMPL_2(NAME, OPERATOR)\
+i32 NAME##_impl (VM* vm) {\
+    RegisterCode dst_reg_code = 0, src_reg_code = 0;\
+    readRegisterCode(dst_reg_code);\
+    readRegisterCode(src_reg_code);\
+    u64 dst_reg_value = 0, src_reg_value = 0;\
+    VM_registerRead(vm, &dst_reg_value, dst_reg_code);\
+    VM_registerRead(vm, &src_reg_value, src_reg_code);\
+    \
+    dst_reg_value = dst_reg_value OPERATOR src_reg_value;\
+    VM_registerWrite(vm, &dst_reg_value, dst_reg_code);\
+    return sizeof(dst_reg_code) + sizeof(src_reg_code);\
+}
+
+#define OPERATOR_IMPL_CMP_FLAG(NAME, OPERATOR)\
+i32 NAME##_impl (VM* vm) {\
+    RegisterCode src0_reg_code = 0, src1_reg_code = 0;\
+    readRegisterCode(src0_reg_code);\
+    readRegisterCode(src1_reg_code);\
+    u64 src0_reg_value = 0, src1_reg_value = 0;\
+    VM_registerRead(vm, &src0_reg_value, src0_reg_code);\
+    VM_registerRead(vm, &src1_reg_value, src1_reg_code);\
+    \
+    vm->flags.cmp = src0_reg_value OPERATOR src1_reg_value;\
+    return sizeof(src0_reg_code) + sizeof(src1_reg_code);\
 }
-*/

src/instructions/impl/logical_operators.c

@@ -0,0 +1,36 @@
+#include "impl_macros.h"
+
+/// NOT [dst_register]
+OPERATOR_IMPL_1(NOT, !)
+
+/// INV [dst_register]
+OPERATOR_IMPL_1(INV, ~)
+
+
+/// OR [dst_register] [src_register]
+OPERATOR_IMPL_2(OR, |)
+
+/// XOR [dst_register] [src_register]
+OPERATOR_IMPL_2(XOR, ^)
+
+/// AND [dst_register] [src_register]
+OPERATOR_IMPL_2(AND, &)
+
+
+/// EQ [src0_register] [src1_register]
+OPERATOR_IMPL_CMP_FLAG(EQ, ==)
+
+/// NE [src0_register] [src1_register]
+OPERATOR_IMPL_CMP_FLAG(NE, !=)
+
+/// LT [src0_register] [src1_register]
+OPERATOR_IMPL_CMP_FLAG(LT, <)
+
+/// LE [src0_register] [src1_register]
+OPERATOR_IMPL_CMP_FLAG(LE, <=)
+
+/// GT [src0_register] [src1_register]
+OPERATOR_IMPL_CMP_FLAG(GT, >)
+
+/// GE [src0_register] [src1_register]
+OPERATOR_IMPL_CMP_FLAG(GE, >=)

src/instructions/impl/math_operators.c

@@ -1,48 +1,16 @@
 #include "impl_macros.h"
 
-#define mathOperatorImpl(OPERATOR){\
-    u8 dst_register_i = 0, src_register_i = 0;\
-    readRegisterVar(dst_register_i);\
-    readRegisterVar(src_register_i);\
-    /*u8 value_size = 0;\
-    readValueSizeVar(value_size);*/\
-    u8 value_size = 4;\
-    \
-    switch(value_size){\
-        case 1: \
-            vm->registers[dst_register_i].u8v0 OPERATOR##= vm->registers[src_register_i].u8v0;\
-            break;\
-        case 2: \
-            vm->registers[dst_register_i].u16v0 OPERATOR##= vm->registers[src_register_i].u16v0;\
-            break;\
-        case 4: \
-            vm->registers[dst_register_i].u32v OPERATOR##= vm->registers[src_register_i].u32v;\
-            break;\
-    }\
-    return sizeof(dst_register_i) + sizeof(src_register_i) + sizeof(value_size);\
-}
-
 /// ADD [dst_register] [src_register]
-i32 ADD_impl(VM* vm){
-    mathOperatorImpl(+);
-}
+OPERATOR_IMPL_2(ADD, +)
 
 /// SUB [dst_register] [src_register]
-i32 SUB_impl(VM* vm){
-    mathOperatorImpl(-);
-}
+OPERATOR_IMPL_2(SUB, -)
 
 /// MUL [dst_register] [src_register]
-i32 MUL_impl(VM* vm){
-    mathOperatorImpl(*)
-}
+OPERATOR_IMPL_2(MUL, *)
 
 /// DIV [dst_register] [src_register]
-i32 DIV_impl(VM* vm){
-    mathOperatorImpl(/)
-}
+OPERATOR_IMPL_2(DIV, /)
 
 /// MOD [dst_register] [src_register]
-i32 MOD_impl(VM* vm){
-    mathOperatorImpl(%)
-}
+OPERATOR_IMPL_2(MOD, %)

src/instructions/instructions.c

@@ -2,32 +2,65 @@
 #include "../collections/HashMap.h"
 
 i32 NOP_impl(VM* vm);
-i32 PUSH_impl(VM* vm);
-i32 MOV_impl(VM* vm);
+i32 EXIT_impl(VM* vm);
+i32 SYS_impl(VM* vm);
+
+i32 MOVC_impl(VM* vm);
+i32 MOVR_impl(VM* vm);
+
 i32 ADD_impl(VM* vm);
 i32 SUB_impl(VM* vm);
 i32 MUL_impl(VM* vm);
 i32 DIV_impl(VM* vm);
 i32 MOD_impl(VM* vm);
-i32 SYS_impl(VM* vm);
-i32 EXIT_impl(VM* vm);
+
+i32 EQ_impl(VM* vm);
+i32 NE_impl(VM* vm);
+i32 LT_impl(VM* vm);
+i32 LE_impl(VM* vm);
+i32 GT_impl(VM* vm);
+i32 GE_impl(VM* vm);
+i32 NOT_impl(VM* vm);
+i32 INV_impl(VM* vm);
+i32 OR_impl(VM* vm);
+i32 XOR_impl(VM* vm);
+i32 AND_impl(VM* vm);
+
 i32 JMP_impl(VM* vm);
-i32 CALL_impl(VM* vm);
+i32 JNZ_impl(VM* vm);
+i32 JZ_impl(VM* vm);
+
 
 Array_declare(Instruction);
 static const Array_Instruction instructions_array = ARRAY(Instruction, {
     Instruction_construct(NOP),
-    Instruction_construct(PUSH),
-    Instruction_construct(MOV),
+    Instruction_construct(EXIT),
+    Instruction_construct(SYS),
+
+    Instruction_construct(MOVC),
+    Instruction_construct(MOVR),
+    
     Instruction_construct(ADD),
     Instruction_construct(SUB),
     Instruction_construct(MUL),
     Instruction_construct(DIV),
     Instruction_construct(MOD),
-    Instruction_construct(SYS),
-    Instruction_construct(EXIT),
-    // Instruction_construct(JMP),
-    // Instruction_construct(CALL),
+
+    Instruction_construct(EQ),
+    Instruction_construct(NE),
+    Instruction_construct(LT),
+    Instruction_construct(LE),
+    Instruction_construct(GT),
+    Instruction_construct(GE),
+    Instruction_construct(NOT),
+    Instruction_construct(INV),
+    Instruction_construct(OR),
+    Instruction_construct(XOR),
+    Instruction_construct(AND),
+    
+    Instruction_construct(JMP),
+    Instruction_construct(JNZ),
+    Instruction_construct(JZ),
 });
 
 const Instruction* Instruction_getByOpcode(Opcode opcode){

src/instructions/instructions.h

@@ -7,15 +7,33 @@ typedef i32 (*InstructionImplFunc_t)(VM* vm);
 
 typedef enum __attribute__((__packed__)) Opcode {
     Opcode_NOP,
-    Opcode_PUSH,
-    Opcode_MOV,
+    Opcode_EXIT,
+    Opcode_SYS,
+
+    Opcode_MOVC,
+    Opcode_MOVR,
+
     Opcode_ADD,
     Opcode_SUB,
     Opcode_MUL,
     Opcode_DIV,
     Opcode_MOD,
-    Opcode_SYS,
-    Opcode_EXIT,
+
+    Opcode_EQ,
+    Opcode_NE,
+    Opcode_LT,
+    Opcode_LE,
+    Opcode_GT,
+    Opcode_GE,
+    Opcode_NOT,
+    Opcode_INV,
+    Opcode_OR,
+    Opcode_XOR,
+    Opcode_AND,
+    
+    Opcode_JMP,
+    Opcode_JNZ,
+    Opcode_JZ,
 } Opcode;
 
 typedef struct Instruction {

src/instructions/registers.c

@@ -1,13 +1,76 @@
 #include "registers.h"
 
+#define check_code(R) if(str_equals(lower, STR(#R))) code = RegisterCode_##R;
+
 RegisterCode RegisterCode_parse(str r){
-    if(str_equals(r, STR("ax")))
-        return RegisterCode_ax;
-    if(str_equals(r, STR("bx")))
-        return RegisterCode_bx;
-    if(str_equals(r, STR("cx")))
-        return RegisterCode_cx;
-    if(str_equals(r, STR("dx")))
-        return RegisterCode_dx;
-    return RegisterCode_Unset;
+    str lower = str_toLower(r);
+    RegisterCode code = RegisterCode_Unset;
+    // a
+    check_code(rax)
+    else check_code(eax)
+    else check_code(ax)
+    else check_code(al)
+    else check_code(ah)
+    // b
+    else check_code(rbx)
+    else check_code(ebx)
+    else check_code(bx)
+    else check_code(bl)
+    else check_code(bh)
+    // c
+    else check_code(rcx)
+    else check_code(ecx)
+    else check_code(cx)
+    else check_code(cl)
+    else check_code(ch)
+    //d
+    else check_code(rdx)
+    else check_code(edx)
+    else check_code(dx)
+    else check_code(dl)
+    else check_code(dh)
+
+    free(lower.data);
+    return code;
+}
+
+str RegisterCode_toString(RegisterCode code){
+    char buf[3] = { '?', 'a', 'x' };
+    u8 index = code / 0x10;
+    switch(index){
+        default:
+            return str_copy(STR("!!! ERROR: invalid RegisterCode !!!"));
+        case 0:
+        case 1:
+        case 2:
+        case 3:
+            buf[1] += index;
+            break;
+    }
+
+    str buf_str = str_construct(buf, 3, false);
+    switch(code & 0xf){
+        default:
+            return str_copy(STR("!!! ERROR: invalid RegisterCode !!!"));
+        case 1:
+            buf_str.data[0] = 'r';
+            break;
+        case 2:
+            buf_str.data[0] = 'e';
+            break;
+        case 4:
+            buf_str.data += 1;
+            buf_str.len -= 1;
+            break;
+        case 7:
+            buf_str.data[0] = 'l';
+            buf_str.len -= 1;
+            break;
+        case 8:
+            buf_str.data[0] = 'h';
+            buf_str.len -= 1;
+            break;
+    }
+
+    return str_copy(buf_str);
 }

src/instructions/registers.h

@@ -3,11 +3,33 @@
 #include "../string/str.h"
 
 typedef enum RegisterCode {
-    RegisterCode_Unset,
-    RegisterCode_ax,
-    RegisterCode_bx,
-    RegisterCode_cx,
-    RegisterCode_dx
-} RegisterCode;
+    RegisterCode_Unset = 0,
+
+    RegisterCode_rax = 0x01,
+    RegisterCode_eax = 0x02,
+    RegisterCode_ax = 0x04,
+    RegisterCode_al = 0x07,
+    RegisterCode_ah = 0x08,
+
+    RegisterCode_rbx = 0x11,
+    RegisterCode_ebx = 0x12,
+    RegisterCode_bx = 0x14,
+    RegisterCode_bl = 0x17,
+    RegisterCode_bh = 0x18,
+
+    RegisterCode_rcx = 0x21,
+    RegisterCode_ecx = 0x22,
+    RegisterCode_cx = 0x24,
+    RegisterCode_cl = 0x27,
+    RegisterCode_ch = 0x28,
+
+    RegisterCode_rdx = 0x31,
+    RegisterCode_edx = 0x32,
+    RegisterCode_dx = 0x34,
+    RegisterCode_dl = 0x37,
+    RegisterCode_dh = 0x38,
+} __attribute__((__packed__)) RegisterCode;
 
 RegisterCode RegisterCode_parse(str register_name);
+/// @return allocated string
+str RegisterCode_toString(RegisterCode code);

src/main.c

@@ -2,6 +2,8 @@
 #include "instructions/instructions.h"
 #include "collections/List.h"
 #include "compiler/Compiler.h"
+#include "VM/Display/Display.h"
+#include <SDL3/SDL.h>
 
 #define arg_is(STR) (strcmp(argv[argi], STR) == 0)
 

src/std.h

@@ -8,6 +8,7 @@
 #include <time.h>
 #include <math.h>
 #include <string.h>
+#include <stdbool.h>
 
 typedef int8_t i8;
 typedef uint8_t u8;
@@ -20,10 +21,6 @@ typedef uint64_t u64;
 typedef float f32;
 typedef double f64;
 
-typedef u8 bool;
-#define true  1
-#define false 0
-
 typedef const char* cstr;
 
 #if defined(_WIN64) || defined(_WIN32)