Assembler Completed

Added the Assembler. Added instructions for the assembler to README.md Added Assembler Manual Modified Makefile to build the Assembler.
2024-10-26 15:31:24 -04:00
parent 044c80d537
commit dfa5ad2638
23 changed files with 1627 additions and 22 deletions
@@ -0,0 +1,93 @@
+// assembly.c
+// These are functions useful for translating assembly mnemonics to hex and vice-versa for the SplitBit CPU.
+// Written by Anachronaut
+// 10/18/2024
+
+#include "assembly.h"
+#include <string.h>
+
+typedef struct {
+    uint8_t opcode;
+    const char* mnemonic;
+} Instruction;
+
+Instruction instruction_set[] = {
+    // Arithmetic and Logic Operations:
+    {0x00, "ADD"},
+    {0x01, "SUB"},
+    {0x02, "AND"},
+    {0x03, "OR"},
+    {0x04, "NOR"},
+    {0x05, "NAND"},
+    {0x06, "XOR"},
+    {0x07, "NOTA"},
+    {0x08, "NOTB"},
+    // Branch Operations:
+    {0x10, "BRI"},
+    {0x11, "BRQ"},
+    {0x12, "BRA"},
+    {0x13, "BRB"},
+    // Register Operations:
+    {0x20, "RSTA"},
+    {0x21, "RSTB"},
+    {0x22, "INCA"},
+    {0x23, "INCB"},
+    {0x24, "DECA"},
+    {0x25, "DECB"},
+    {0x26, "LDA"},
+    {0x27, "LDB"},
+    {0x28, "INIA"},
+    {0x29, "INIB"},
+    // Stack Operations:
+    {0x30, "PSHQ"},
+    {0x31, "PSHA"},
+    {0x32, "PSHB"},
+    {0x33, "PSHP"},
+    {0x34, "PSHD"},
+    {0x35, "POPA"},
+    {0x36, "POPB"},
+    {0x37, "POPP"},
+    {0x38, "POPD"},
+    // Data Operations:
+    {0x40, "INCD"},
+    {0x41, "DECD"},
+    {0x42, "LDA"},
+    {0x43, "LDB"},
+    {0x44, "STQ"},
+    {0x45, "STA"},
+    {0x46, "STB"},
+    {0x47, "SETD"},
+    // Output Operations:
+    {0xD0, "OUTQ"},
+    {0xD1, "OUTA"},
+    {0xD2, "OUTB"},
+    // Input Operations:
+    {0xE0, "INA"},
+    {0xE1, "INB"},
+    {0xE2, "IND"},
+    // Special Operations:
+    {0xF0, "NOP"},
+    {0xFF, "HALT"}
+};
+
+int num_instructions = sizeof(instruction_set) / sizeof(Instruction);
+
+const char* getMnemonic(uint8_t opcode) {
+    for (int i = 0; i < num_instructions; i++) {
+        if (instruction_set[i].opcode == opcode) {
+            return instruction_set[i].mnemonic;
+        }
+    }
+    return "---";
+}
+
+uint8_t getOpcode(char* mnemonic) {
+    for (int i = 0; i < num_instructions; i++) {
+        if (strcmp(instruction_set[i].mnemonic, mnemonic) == 0) {
+            return instruction_set[i].opcode;
+        }
+    }
+    return 0xFE; // FE is an unused instruction, we'll use it to indicate an error.
+}
+
+