added to aas3

ass3/simulator_SIC_XE/include/opcode.h

@@ -0,0 +1,127 @@
+#ifndef OPCODE_H
+#define OPCODE_H
+
+#include "utils.h"
+
+#include <unordered_map>
+#include <string_view>
+#include <optional>
+#include <cstdint>
+
+// ==============================
+// Opcode definitions (SIC/XE)
+// ==============================
+#define ADD     0x18
+#define ADDF    0x58
+#define ADDR    0x90
+#define AND     0x40
+#define CLEAR   0xB4
+#define COMP    0x28
+#define COMPF   0x88
+#define COMPR   0xA0
+#define DIV     0x24
+#define DIVF    0x64
+#define DIVR    0x9C
+#define FIX     0xC4
+#define FLOAT   0xC0
+#define HIO     0xF4
+#define J       0x3C
+#define JEQ     0x30
+#define JGT     0x34
+#define JLT     0x38
+#define JSUB    0x48
+#define LDA     0x00
+#define LDB     0x68
+#define LDCH    0x50
+#define LDF     0x70
+#define LDL     0x08
+#define LDS     0x6C
+#define LDT     0x74
+#define LDX     0x04
+#define LPS     0xD0
+#define MUL     0x20
+#define MULF    0x60
+#define MULR    0x98
+#define NORM    0xC8
+#define OR      0x44
+#define RD      0xD8
+#define RMO     0xAC
+#define RSUB    0x4C
+#define SHIFTL  0xA4
+#define SHIFTR  0xA8
+#define SIO     0xF0
+#define SSK     0xEC
+#define STA     0x0C
+#define STB     0x78
+#define STCH    0x54
+#define STF     0x80
+#define STI     0xD4
+#define STL     0x14
+#define STS     0x7C
+#define STSW    0xE8
+#define STT     0x84
+#define STX     0x10
+#define SUB     0x1C
+#define SUBF    0x5C
+#define SUBR    0x94
+#define SVC     0xB0
+#define TD      0xE0
+#define TIO     0xF8
+#define TIX     0x2C
+#define TIXR    0xB8
+#define WD      0xDC
+
+// ==============================
+// Extended opcodes (SIC/XE/XE)
+// ==============================
+#define NOP     0xF1
+#define HALT    0xF2
+#define XEXE    0xEE // Enable extended mode
+#define VADD    0x18
+#define VADDR   0x90
+#define VSUB    0x1C
+#define VSUBR   0x94
+#define VMUL    0x20
+#define VMULR   0x98
+#define VDIV    0x24
+#define VDIVR   0x9C
+#define STVA    0x0C
+#define STVS    0x7C
+#define STVT    0x84
+#define LDVA    0x00
+#define LDVS    0x68
+#define LDVT    0x04
+
+static std::unordered_map<std::string_view, uint8_t> mnemonicToOpcode;
+static bool opcodeTablesInitialized = false;
+
+
+enum class InstructionType {
+    TYPE1,
+    TYPE2,
+    TYPE3_4,
+    INVALID
+};
+
+class Machine; // forward
+
+// Store raw function pointer (void*) to allow different handler signatures
+using RawHandler = void*;
+
+struct InstructionInfo {
+    const char* name;
+    InstructionType type;
+    RawHandler handler;
+};
+
+extern InstructionInfo instructions[];
+extern InstructionInfo instructionsEXEX[];
+
+extern std::optional<uint8_t> findOpcodeByMnemonic(std::string_view name);
+extern const InstructionInfo& getInstructionInfo(uint8_t opcode);
+
+
+// Initialize the instruction table
+void loadInstructionSet();
+
+#endif // OPCODE_H