src/spider/runtime/cpu/CPU.cpp

@@ -80,7 +80,7 @@ namespace spider {
         _opers[1] = _opers[0];
 
         // call specific addressing mode
-        (this->*(CPU::addrModes[_addrm]))();
+        (this->*(CPU::addrModes[_addrm & 0b111]))(); // mask added here too
     }
 
     void CPU::fetchOperSrc() {
@@ -88,21 +88,19 @@ namespace spider {
         _alu = &ALU1;
 
         // call specific addressing mode
-        (this->*(CPU::addrModes[_addrm]))();
+        (this->*(CPU::addrModes[_addrm & 0b111]))(); // mask keeps index within 0-7
 
         // modify the _addrm register
         _addrm = static_cast<u8>((_addrm >> 3) & 0x1F);
         _addrm++;
     }
 
-    /**
+
-        instrMap[] is the correct 512-entry dispatch
-        table that maps operation codes to instruction methods.
-    */
     void CPU::execute() {
-        (this->*(CPU::instrMap[_opcode]))();
+        (this->*(CPU::instrMap[_opcode]))(); // no null check needed
     }
 
+
     // Addressing Modes //
 
     /**
@@ -149,6 +147,7 @@ namespace spider {
         // get byte
         u8 reg = (_reel->readU8(RI) >> sh) & 0xF;
         _alu = &GPR[reg];
+        _opers[0] = _alu; // explicitly sets _opers[0] = _dst
         RI += use;
 
         // store no-op

src/spider/runtime/debug/LiveDebug.cpp

@@ -330,18 +330,16 @@ namespace spider {
     int liveDebugMain() {
         Terminal t;
         Runtime runtime(1024);
+
+
         InstrReelFixed fix(100);
-        runtime.ram[0] = 0xFF;
+
-        runtime.ram[1] = 0xEE;
+
-        runtime.ram[2] = 0xDD;
+
-        runtime.ram[3] = 0xCC;
-        runtime.ram[4] = 0xBB;
-        runtime.ram[5] = 0xAA;
-        runtime.ram[6] = 0x99;
-        runtime.ram[7] = 0x88;
-        fix.writeU16(0, 0b0000111);
         runtime.hookReel(&fix, false);
 
+
+
         bool running = true, update = true;
         u64 ramScroll = 0;
         u8 key = Terminal::UNKNOWN;
@@ -388,7 +386,7 @@ namespace spider {
             case Terminal::ENTER:
                 update = true;
                 runtime.cpu.fetchInstr();
-                runtime.cpu.fetchOperDst();
+                runtime.cpu.execute(); // looks up instrMap[_opcode] & calls the correct instruction method (e.g. FMUL)
                 break;
             default:
                 break;

src/spider/runtime/instr/Instr_000-01F.cpp

@@ -111,16 +111,16 @@ namespace spider {
         fetchOperDst();
         switch(_size){
             case 0b00: //byte
-                _dst->_u16 = _dst->_u8 & 1;
+                _dst->_i16 = static_cast<i16>(_dst->_i8);
                 break;
             case 0b01: //short
-                _dst->_u32 = _dst->_u16 & 1;
+                _dst->_i32 = static_cast<i32>(_dst->_i16);
                 break;
             case 0b10: //int
-                _dst->_u64 = _dst->_u32 & 1;
+                _dst->_i64 = static_cast<i64>(_dst->_i32);
                 break;
             case 0b11: //long
-                _dst->_u64 = _dst->_u64;
+                _dst->_i64 = _dst->_i64;
                 break;
         }
         _dst->_u32 = _dst->_u8;
@@ -295,19 +295,19 @@ namespace spider {
         (this->*_post)();
     }
 
-    void CPU::DMOD() {
+    void CPU::DMOD() { //It gives error and I dont understand why
-        // TODO: Implement DMOD
+        // TODO: Implement DMOD 
         fetchOperSrc();
         fetchOperDst();
         switch(_size){
             case 0b00: //byte
-                _dst->_i8 = _dst->_i8 / _src->_i8, _dst->_i8 % _src->_i8;
+                //_dst->_i8 / _src->_i8 = RX * _src + RY;
             case 0b01: //short
-                _dst->_i16 = _dst->_i16 / _src->_i16, _dst->_i16 % _src->_i16;
+                //_dst->_i16 / _src->_i16 = RX * _src->_i16 + RY;
             case 0b10: //int
-                _dst->_i32 = _dst->_i32 / _src->_i32, _dst->_i32 % _src->_i32;
+                //_dst->_i32 / _src->_i32 = RX * _src->_i32 + RY;
             case 0b11: //long
-                _dst->_i64 = _dst->_i64 / _src->_i64, _dst->_i64 % _src->_i64;
+                //_dst->_i64 / _src->_i64 = RX * _src->_i64 + RY;
         }
         (this->*_post)();
     }
@@ -318,13 +318,13 @@ namespace spider {
         fetchOperDst();
         switch(_size){
             case 0b00: //byte
-                _dst->_u8 = _dst->_u8 / _src->_u8, _dst->_u8 % _src->_u8;
+                //_dst->_u8 / _src->_u8 = RX * _src->_u8 + RY;
             case 0b01: //short
-                _dst->_u16 = _dst->_u16 / _src->_u16, _dst->_u16 % _src->_u16;
+                //_dst->_u16 / _src->_u16 = RX * _src->_u16 + RY;
             case 0b10: //int
-                _dst->_u32 = _dst->_u32 / _src->_u32, _dst->_u32 % _src->_u32;
+                //_dst->_u32 / _src->_u32 = RX * _src->_u32 + RY;
             case 0b11: //long
-                _dst->_u64 = _dst->_u64 / _src->_u64, _dst->_u64 % _src->_u64;
+                //_dst->_u64 / _src->_u64 = RX * _src->_u64 + RY;
         }
         (this->*_post)();
     }

src/spider/runtime/instr/Instr_020-03F.cpp

@@ -63,13 +63,13 @@ namespace spider {
         fetchOperDst();
         switch(_size){
             case 0b00: //byte
-                _dst->_u8 = 1;
+                _dst->_u8 = _dst != 0;
             case 0b01: //short
-                _dst->_u16 = 1;
+                _dst->_u16 = _dst != 0;
             case 0b10: //int
-                _dst->_u32 = 1;
+                _dst->_u32 = _dst != 0;
             case 0b11: //long
-                _dst->_u64 = 1;
+                _dst->_u64 = _dst != 0;
         }
         (this->*_post)();
     }

src/spider/runtime/instr/Instr_040-05F.cpp

@@ -5,6 +5,8 @@
 
 #include <spider/runtime/cpu/CPU.hpp>
 #include <spider/runtime/memory/RAM.hpp>
+#include <cmath> // provides std::fmod, std::fma and cast support
+
 
 namespace spider {
 
@@ -193,52 +195,207 @@ namespace spider {
         (this->*_post)();
     }
 
+    // ── 0x054 — FMUL: Float Multiplication ───────────────────────────────────
     void CPU::FMUL() {
-        // TODO: Implement FMUL
+        fetchOperSrc();
+        fetchOperDst();
+        switch (_size) {
+            case 0b10: _dst->_f32 *= _src->_f32; break; // f32
+            case 0b11: _dst->_f64 *= _src->_f64; break; // f64
+            default:                              break; // invalid size
+        }
+        (this->*_post)();
     }
 
+    // ── 0x055 — FDIV: Float Division ─────────────────────────────────────────
     void CPU::FDIV() {
-        // TODO: Implement FDIV
+        fetchOperSrc();
+        fetchOperDst();
+        switch (_size) {
+            case 0b10: _dst->_f32 /= _src->_f32; break;
+            case 0b11: _dst->_f64 /= _src->_f64; break;
+            default:                              break;
+        }
+        (this->*_post)();
     }
 
+    // ── 0x056 — FMOD: Float Modulus ──────────────────────────────────────────
+    // C++ has no % for floats — std::fmod performs the equivalent operation
     void CPU::FMOD() {
-        // TODO: Implement FMOD
+        fetchOperSrc();
+        fetchOperDst();
+        switch (_size) {
+            case 0b10: _dst->_f32 = std::fmod(_dst->_f32, _src->_f32); break;
+            case 0b11: _dst->_f64 = std::fmod(_dst->_f64, _src->_f64); break;
+            default:                                                     break;
+        }
+        (this->*_post)();
     }
 
+    // ── 0x057 — FDMOD: Float Division and Modulus ────────────────────────────
+    // dst / src = RX (quotient) * src + RY (remainder)
     void CPU::FDMOD() {
-        // TODO: Implement FDMOD
+        fetchOperSrc();
+        fetchOperDst();
+        switch (_size) {
+            case 0b10: {
+                f32 q  = static_cast<f32>(static_cast<i32>(_dst->_f32 / _src->_f32));
+                f32 r  = _dst->_f32 - (q * _src->_f32);
+                RX._f32 = q;
+                RY._f32 = r;
+                break;
+            }
+            case 0b11: {
+                f64 q  = static_cast<f64>(static_cast<i64>(_dst->_f64 / _src->_f64));
+                f64 r  = _dst->_f64 - (q * _src->_f64);
+                RX._f64 = q;
+                RY._f64 = r;
+                break;
+            }
+            default: break;
+        }
+        (this->*_post)();
     }
 
+    // ── 0x058 — FEPS: Set Float Epsilon Value ────────────────────────────────
+    // Loads the epsilon value into RN (the epsilon register)
     void CPU::FEPS() {
-        // TODO: Implement FEPS
+        fetchOperDst();
+        switch (_size) {
+            case 0b10: RN = _dst->_u32; break; // store f32 bits in RN
+            case 0b11: RN = _dst->_u64; break; // store f64 bits in RN
+            default:                    break;
+        }
+        (this->*_post)();
     }
 
+    // ── 0x059 — FEEP: Float Enable/Disable Epsilon ───────────────────────────
+    // Bit 12 of RF is the Epsilon Enable flag
     void CPU::FEEP() {
-        // TODO: Implement FEEP
+        fetchOperDst();
+        constexpr u64 EPSILON_ENABLE_BIT = (1ULL << 12);
+        if (_dst->_u64) RF |=  EPSILON_ENABLE_BIT; // non-zero → enable
+        else            RF &= ~EPSILON_ENABLE_BIT;  // zero     → disable
+        (this->*_post)();
     }
 
+    // ── 0x05A — FEQ: Float Equal ──────────────────────────────────────────────
+    // Sets bit 10 (Zero/Equal flag) in RF if dst == src
     void CPU::FEQ() {
-        // TODO: Implement FEQ
+        fetchOperSrc();
+        fetchOperDst();
+        constexpr u64 ZERO_FLAG = (1ULL << 10);
+        bool equal = false;
+        switch (_size) {
+            case 0b10: equal = (_dst->_f32 == _src->_f32); break;
+            case 0b11: equal = (_dst->_f64 == _src->_f64); break;
+            default:                                        break;
+        }
+        if (equal) RF |=  ZERO_FLAG;
+        else       RF &= ~ZERO_FLAG;
+        (this->*_post)();
     }
 
+    // ── 0x05B — FNE: Float Not Equal ─────────────────────────────────────────
     void CPU::FNE() {
-        // TODO: Implement FNE
+        fetchOperSrc();
+        fetchOperDst();
+        constexpr u64 ZERO_FLAG = (1ULL << 10);
+        bool notEqual = false;
+        switch (_size) {
+            case 0b10: notEqual = (_dst->_f32 != _src->_f32); break;
+            case 0b11: notEqual = (_dst->_f64 != _src->_f64); break;
+            default:                                           break;
+        }
+        if (notEqual) RF |=  ZERO_FLAG;
+        else          RF &= ~ZERO_FLAG;
+        (this->*_post)();
     }
 
+    // ── 0x05C — FGT: Float Greater Than ──────────────────────────────────────
+    // Sets/clears bit 9 (Negative flag) in RF
     void CPU::FGT() {
-        // TODO: Implement FGT
+        fetchOperSrc();
+        fetchOperDst();
+        constexpr u64 NEGATIVE_FLAG = (1ULL << 9);
+        bool gt = false;
+        switch (_size) {
+            case 0b10: gt = (_dst->_f32 > _src->_f32); break;
+            case 0b11: gt = (_dst->_f64 > _src->_f64); break;
+            default:                                    break;
+        }
+        if (gt) RF &= ~NEGATIVE_FLAG;
+        else    RF |=  NEGATIVE_FLAG;
+        (this->*_post)();
     }
 
+    // ── 0x05D — FGE: Float Greater or Equal ──────────────────────────────────
     void CPU::FGE() {
-        // TODO: Implement FGE
+        fetchOperSrc();
+        fetchOperDst();
+        constexpr u64 NEGATIVE_FLAG = (1ULL << 9);
+        constexpr u64 ZERO_FLAG     = (1ULL << 10);
+        bool ge = false;
+        bool eq = false;
+        switch (_size) {
+            case 0b10:
+                ge = (_dst->_f32 >= _src->_f32);
+                eq = (_dst->_f32 == _src->_f32);
+                break;
+            case 0b11:
+                ge = (_dst->_f64 >= _src->_f64);
+                eq = (_dst->_f64 == _src->_f64);
+                break;
+            default: break;
+        }
+        if (ge) RF &= ~NEGATIVE_FLAG;
+        else    RF |=  NEGATIVE_FLAG;
+        if (eq) RF |=  ZERO_FLAG;
+        else    RF &= ~ZERO_FLAG;
+        (this->*_post)();
     }
 
+    // ── 0x05E — FLT: Float Lower Than ────────────────────────────────────────
     void CPU::FLT() {
-        // TODO: Implement FLT
+        fetchOperSrc();
+        fetchOperDst();
+        constexpr u64 NEGATIVE_FLAG = (1ULL << 9);
+        bool lt = false;
+        switch (_size) {
+            case 0b10: lt = (_dst->_f32 < _src->_f32); break;
+            case 0b11: lt = (_dst->_f64 < _src->_f64); break;
+            default:                                    break;
+        }
+        if (lt) RF |=  NEGATIVE_FLAG;
+        else    RF &= ~NEGATIVE_FLAG;
+        (this->*_post)();
     }
 
+    // ── 0x05F — FLE: Float Lower or Equal ────────────────────────────────────
     void CPU::FLE() {
-        // TODO: Implement FLE
+        fetchOperSrc();
+        fetchOperDst();
+        constexpr u64 NEGATIVE_FLAG = (1ULL << 9);
+        constexpr u64 ZERO_FLAG     = (1ULL << 10);
+        bool le = false;
+        bool eq = false;
+        switch (_size) {
+            case 0b10:
+                le = (_dst->_f32 <= _src->_f32);
+                eq = (_dst->_f32 == _src->_f32);
+                break;
+            case 0b11:
+                le = (_dst->_f64 <= _src->_f64);
+                eq = (_dst->_f64 == _src->_f64);
+                break;
+            default: break;
+        }
+        if (le) RF &= ~NEGATIVE_FLAG;
+        else    RF |=  NEGATIVE_FLAG;
+        if (eq) RF |=  ZERO_FLAG;
+        else    RF &= ~ZERO_FLAG;
+        (this->*_post)();
     }
 
+
 }

src/spider/runtime/instr/Instr_060-07F.cpp

@@ -4,39 +4,69 @@
  */
 
 #include <spider/runtime/cpu/CPU.hpp>
+#include <cmath> // provides std::fmod, std::fma and cast support
+
 
 namespace spider {
 
+// ── 0x060 — F2D: Float (f32) to Double (f64) ─────────────────────────────
+    // Widening conversion — no precision is lost
     void CPU::F2D() {
-        // TODO: Implement F2D
+        fetchOperDst();
+        _dst->_f64 = static_cast<f64>(_dst->_f32);
+        (this->*_post)();
     }
 
+    // ── 0x061 — D2F: Double (f64) to Float (f32) ─────────────────────────────
+    // Narrowing conversion — precision may be lost
     void CPU::D2F() {
-        // TODO: Implement D2F
+        fetchOperDst();
+        _dst->_f32 = static_cast<f32>(_dst->_f64);
+        (this->*_post)();
     }
 
+    // ── 0x062 — I2F: Integer (i32) to Float (f32) ────────────────────────────
     void CPU::I2F() {
-        // TODO: Implement I2F
+        fetchOperDst();
+        _dst->_f32 = static_cast<f32>(_dst->_u32);
+        (this->*_post)();
     }
 
+    // ── 0x063 — I2D: Integer (i32) to Double (f64) ───────────────────────────
     void CPU::I2D() {
-        // TODO: Implement I2D
+        fetchOperDst();
+        _dst->_f64 = static_cast<f64>(_dst->_u32);
+        (this->*_post)();
     }
 
+    // ── 0x064 — L2F: Long (i64) to Float (f32) ───────────────────────────────
     void CPU::L2F() {
-        // TODO: Implement L2F
+        fetchOperDst();
+        _dst->_f32 = static_cast<f32>(_dst->_u64);
+        (this->*_post)();
     }
 
+    // ── 0x065 — L2D: Long (i64) to Double (f64) ──────────────────────────────
     void CPU::L2D() {
-        // TODO: Implement L2D
+        fetchOperDst();
+        _dst->_f64 = static_cast<f64>(_dst->_u64);
+        (this->*_post)();
     }
 
+    // ── 0x066 — F2I: Float (f32) to Integer (i32) ────────────────────────────
+    // Truncates toward zero
     void CPU::F2I() {
-        // TODO: Implement F2I
+        fetchOperDst();
+        _dst->_u32 = static_cast<u32>(_dst->_f32);
+        (this->*_post)();
     }
 
+    // ── 0x067 — F2L: Float (f32) to Long (i64) ───────────────────────────────
+    // Truncates toward zero
     void CPU::F2L() {
-        // TODO: Implement F2L
+        fetchOperDst();
+        _dst->_u64 = static_cast<u64>(_dst->_f32);
+        (this->*_post)();
     }
 
     void CPU::D2I() {

src/spider/runtime/util/Terminal.cpp

@@ -11,8 +11,15 @@
 #include <termios.h>
 #include <unistd.h>
 #include <stdio.h>
+#include <sys/ioctl.h> //This was missing,
+//The ioctl, TIOCGWINSZ and winsize used in getSize() live in that header, but it was never included.
 #endif
 
+
+//the Linux includes at the top are inside #if SPIDER_OS_LINUX which IS defined,
+//but getSize() is inside #if SPIDER_DISTRO_DESKTOP which is NOT defined,
+//so the compiler sees the ioctl call without the include that would have covered it.
+
 #if defined(SPIDER_DISTRO_DESKTOP)
 
 namespace spider {
@@ -218,7 +225,8 @@ namespace spider {
         struct termios oldt, newt;
         tcgetattr(STDIN_FILENO, &oldt);
         newt = oldt;
-        newt.c_lflag &= ~(ICANON | ECHO);
+        //newt.c_lflag &= ~(ICANON | ECHO);
+        newt.c_lflag &= static_cast<tcflag_t>(~(ICANON | ECHO)); //added this line
         tcsetattr(STDIN_FILENO, TCSANOW, &newt);
 
         u8 result = Terminal::UNKNOWN;
@@ -247,7 +255,8 @@ namespace spider {
             }
         } else if (ch == 10)  result = Terminal::ENTER;
         else if (ch == 127) result = Terminal::BACKSPACE;
-        else result = (u8)ch;
+        else result = static_cast<u8>(ch); //added this line
+        //else result = (u8)ch;
 
         tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
         return result;