ram, instr reel, runtime, etc

src/spider/SpiderRuntime.hpp

@@ -7,5 +7,6 @@ namespace spider {
     class Runtime;
     class CPU;
     class RAM;
+    class InstrReel;
 
 }

src/spider/runtime/Runtime.cpp

@@ -0,0 +1,29 @@
+#include "Runtime.hpp"
+
+namespace spider {
+
+    // Constructors & Destructors //
+
+    Runtime::Runtime() : ram(0) {}
+
+    Runtime::Runtime(u64 ramSize) : ram(ramSize) {}
+
+    Runtime::~Runtime() {}
+
+    // Stepping/Running the Machine //
+
+    void Runtime::step() {}
+
+    void Runtime::step(u64 n) {}
+
+    void Runtime::run() {}
+
+    void Runtime::run(u64 n) {}
+
+    // Misc //
+
+    void Runtime::resizeRAM(u64 length) {
+        ram.resize(length);
+    }
+
+}

src/spider/runtime/Runtime.hpp

@@ -0,0 +1,73 @@
+#pragma once
+
+#include <spider/runtime/cpu/CPU.hpp>
+#include <spider/runtime/memory/RAM.hpp>
+
+namespace spider {
+
+    /**
+     * The main runtime class.
+     * This is where the Spider VM (Runtime) lives
+     */
+    class Runtime {
+    private:
+
+        CPU cpu;
+        RAM ram;
+
+    public:
+
+        /**
+         * Creates a new runtime, with no memory.
+         */
+        Runtime();
+
+        /**
+         * Creates a new runtime, with a specific
+         * amount of memory.
+         */
+        Runtime(u64 ramSize);
+
+        /**
+         * Runtime Destructor.
+         */
+        ~Runtime();
+
+    public:
+
+        /**
+         * Steps the clock of the VM once.
+         */
+        void step();
+
+        /**
+         * Steps n-times the clock of the VM.
+         */
+        void step(u64 n);
+
+    public:
+
+        /**
+         * Sets the machine to run continously.
+         * If interrupts occur, they will be handled
+         * automatically.
+         */
+        void run();
+
+        /**
+         * Runs this machine for a set amount of
+         * milliseconds.
+         */
+        void run(u64 ms);
+
+    public:
+        
+        /**
+         * Resizes the ram, which will preserve
+         * data inside the next length.
+         */
+        void resizeRAM(u64 length);
+
+    };
+
+}

src/spider/runtime/cpu/CPU.hpp

@@ -22,6 +22,7 @@ namespace spider {
         u64 RM;
 
     public:
+
         /**
          * These are private registers, which are only used
          * whenever constant things are used.
@@ -31,9 +32,21 @@ namespace spider {
         register_t ALU0, ALU1;
 
     public:
+
         CPU();
+
+        CPU(const CPU& other) = default;
+
+        CPU(CPU&& other) noexcept = default;
+
         ~CPU();
 
+    public:
+        
+        CPU& operator=(const CPU& other) = default;
+
+        CPU& operator=(CPU&& other) noexcept = default;
+
     public:
 
         // <pygen-target name=cpu-instructions> //

src/spider/runtime/cpu/InstrReel.cpp

@@ -0,0 +1,29 @@
+#include "InstrReel.hpp"
+
+namespace spider {
+
+    InstrReel::InstrReel() {}
+
+    InstrReel::~InstrReel() {}
+
+    u16 InstrReel::instrAt(u64 ip) const {}
+
+    u8 InstrReel::dataAt(u64 ip) const {}
+
+    u8 InstrReel::feedNext(CPU& cpu) {}
+
+    // Static Utils //
+
+    u16 InstrReel::unpackInstr(u16 bcode) {
+        return (bcode >> 5) & 0x1FF;
+    }
+
+    u8 InstrReel::unpackAddrMode(u16 bcode) {
+        return (bcode >> 2) & 0x1F;
+    }
+
+    u8 InstrReel::unpackTypeSize(u16 bcode) {
+        return bcode & 0x3;
+    }
+
+}

src/spider/runtime/cpu/InstrReel.hpp

@@ -0,0 +1,59 @@
+#pragma once
+
+#include <spider/SpiderRuntime.hpp>
+
+namespace spider {
+
+    /**
+     * Implements an instruction reel.
+     */
+    class InstrReel {
+    private:
+
+    public:
+
+        InstrReel();
+
+        ~InstrReel();
+
+    public:
+
+    
+
+    public:
+
+        /**
+         * Returns the two-byte instruction at the
+         * specific byte location.
+         */
+        u16 instrAt(u64 ip) const;
+
+        /**
+         * Obtains a byte of data at
+         * the specific location.
+         */
+        u8 dataAt(u64 ip) const;
+
+    public:
+
+        /**
+         * Fetches the data, and then
+         * feeds the instruction into the
+         * CPU.
+         * 
+         * Returns how many steps it should
+         * move after.
+         */
+        u8 feedNext(CPU& cpu);
+
+    public: // Static Utils //
+
+        static u16 unpackInstr(u16 bcode);
+
+        static u8 unpackAddrMode(u16 bcode);
+
+        static u8 unpackTypeSize(u16 bcode);
+
+    };
+
+}

src/spider/runtime/instr/Instr_00-1F.cpp

@@ -0,0 +1,9 @@
+#include <spider/runtime/cpu/CPU.hpp>
+
+namespace spider {
+
+    void CPU::NOP() {
+        // No Operation //
+    }
+
+}

src/spider/runtime/memory/RAM.cpp

@@ -0,0 +1,114 @@
+#include "RAM.hpp"
+
+#include <cstring>
+
+namespace spider {
+
+    // Constructors & Destructors //
+
+    RAM::RAM(u64 length) : _mem(nullptr), _size(length), _oob(0) {
+        if (_size > 0) {
+            _mem = new u8[_size];
+            std::memset(_mem, 0, _size);
+        }
+    }
+
+    RAM::RAM(const RAM& other) : _size(other._size), _oob(0) {
+        _mem = new u8[_size];
+        std::copy(other._mem, other._mem + _size, _mem);
+    }
+
+    RAM::RAM(RAM&& other) noexcept : _mem(other._mem), _size(other._size), _oob(0) {
+        other._mem = nullptr;
+        other._size = 0;
+    }
+
+    RAM::~RAM() {
+        delete[] _mem;
+    }
+
+    // Assign Operators //
+
+    RAM& RAM::operator=(const RAM& other) {
+        if (this == &other) return *this; // lock self
+
+        u8* new_mem = new u8[other._size];
+        std::copy(other._mem, other._mem + other._size, new_mem);
+
+        delete[] _mem;
+        _mem = new_mem;
+        _size = other._size;
+
+        return *this;
+    }
+
+    RAM& RAM::operator=(RAM&& other) noexcept {
+        if (this == &other) return *this; // lock self
+
+        delete[] _mem;
+
+        _mem = other._mem; // time to steal!
+        _size = other._size;
+
+        other._mem = nullptr; // leave as a husk
+        other._size = 0;
+
+        return *this;
+    }
+
+    // Unsafe Access //
+
+    u8& RAM::operator[](u64 i) { return _mem[i]; }
+
+    u8  RAM::operator[](u64 i) const { return _mem[i]; }
+
+    // Managed Access //
+
+    u8& RAM::at(u64 i) {
+        return (i < _size) ? _mem[i] : _oob;
+    }
+
+    u8 RAM::at(u64 i) const {
+        return (i < _size) ? _mem[i] : _oob;
+    }
+
+    // Misc //
+
+    void RAM::resize(u64 new_size) {
+        // Special case 1
+        if (new_size == _size) return;
+
+        // Special case 2
+        if (new_size == 0) {
+            delete[] _mem;
+            _mem = nullptr;
+            _size = 0;
+            return;
+        }
+
+        // 1. Allocate the new block
+        u8* new_mem = new u8[new_size];
+
+        // 2. Zero-initialize
+        std::memset(new_mem, 0, new_size);
+
+        // 3. Preserve data
+        // If shrinking, copy 'new_size' bytes. If growing, copy 'old_size' bytes.
+        u64 bytes_to_copy = (new_size < _size) ? new_size : _size;
+
+        // 3.1 Previous size could be zero, where _mem would be null
+        if (_mem != nullptr) {
+            std::copy(_mem, _mem + bytes_to_copy, new_mem);
+        }
+
+        // 4. Swap and Clean up
+        delete[] _mem;
+        _mem = new_mem;
+        _size = new_size;
+    }
+
+    u64 RAM::size() const {
+        return _size;
+    }
+
+}

src/spider/runtime/memory/RAM.hpp

@@ -12,13 +12,25 @@ namespace spider {
     class RAM {
     private:
         u8* _mem;
+        u64 _size;
+        u8 _oob; // Out of bounds reference
 
     public:
 
         RAM(u64 length);
 
+        RAM(const RAM& other);
+
+        RAM(RAM&& other) noexcept;
+
         ~RAM();
 
+    public:
+
+        RAM& operator=(const RAM& other);
+
+        RAM& operator=(RAM&& other) noexcept;
+
     public: // Unsafe access
 
         u8& operator[](u64 i);
@@ -31,6 +43,12 @@ namespace spider {
 
         u8 at(u64 i) const;
 
+    public:
+
+        void resize(u64 new_size);
+
+        u64 size() const;
+
     };
 
 }

src/spider/runtime/native/distro.hpp

@@ -1,17 +1,5 @@
 #pragma once
 
-// ========================================================== //
-//                Compiling or Writing?                       //
-// ========================================================== //
-
-#ifdef SPIDER_WRITING
-    #error "[Spider Distro] Please do not set this macro."
-#endif
-
-#ifndef SPIDER_COMPILING
-    #define SPIDER_WRITING
-#endif
-
 // ========================================================== //
 //                        Distro                              //
 // ========================================================== //
@@ -43,11 +31,9 @@
         #define SPIDER_DISTRO_DESKTOP
         #define SPIDER_OS_LINUX
     #else
-        // ========================================================== //
+        // === MUST be a microcontroller! === //
-        //              MUST be a microcontroller!                    //
+        #include <spider/runtime/native/distro_mcu.hpp>
-        // ========================================================== //
+        #ifndef SPIDER_DISTRO_MICRO
-        #include <spider/config_mcu.hpp>
-        #ifdef SPIDER_DISTRO_MICRO
             #error "[Spider Distro] Could not autodetect. Please select a distro and OS manually."
         #endif
     #endif
@@ -107,8 +93,6 @@
 
 #elif defined(SPIDER_DISTRO_MICRO)
 
-    #include <spider/runtime/native/distro_mcu.hpp>
-
     #define SPIDER_DISTRO_NAME "Micro"
 
     #if !defined(SPIDER_USE_ICU) && !defined(SPIDER_NO_ICU)
@@ -127,4 +111,5 @@
 
 #endif
 
-
+// === Include Distro Defaults === //
+#include <spider/runtime/native/distro_defs.hpp>

src/spider/runtime/native/distro_defs.hpp

@@ -0,0 +1,40 @@
+#pragma once
+
+// ========================================================== //
+//            SPIDER DEFAULT SETTINGS, PER DISTRO             //
+// ========================================================== //
+
+
+// ================== MEMORY FOOTPRINT ================== //
+
+/**
+ * Use a normal amount of memory, assuming there
+ * is like 100KB free of it.
+ */
+#define SPIDER_MEMFOOTPRINT_NORMAL  0
+/**
+ * Attempt to reduce the memory footprint
+ * where possible, but without doing
+ * extreme adaptations.
+ */
+#define SPIDER_MEMFOOTPRINT_REDUCED 1
+/**
+ * Will deliverately convert things from memory
+ * to functions in order to free as much memory
+ * as possible, even if it slows things down.
+ */
+#define SPIDER_MEMFOOTPRINT_MINIMAL 2
+
+#ifndef SPIDER_MEMFOOTPRINT
+    #if defined(SPIDER_DISTRO_MOBILE) || defined(SPIDER_DISTRO_BROWSER)
+        #define SPIDER_MEMFOOTPRINT SPIDER_MEMFOOTPRINT_REDUCED
+    #elif defined(SPIDER_DISTRO_MICRO)
+        #define SPIDER_MEMFOOTPRINT SPIDER_MEMFOOTPRINT_MINIMAL
+    #else
+        #define SPIDER_MEMFOOTPRINT SPIDER_MEMFOOTPRINT_NORMAL
+    #endif
+#endif
+
+// ================== MISC ================== //
+
+