Introduced new instructions for comparison

Comparing signed and unsigned versions of numbers.  Same for EQ as
well.

Notice the irregular pattern of BYTE, CHAR, INT, HWORD,LONG,WORD as
OPCODE_IS_TYPE requires the subcodes to be surrounded by BYTE and
WORD.

vm/inst.c

@@ -108,12 +108,93 @@ const char *opcode_as_cstr(opcode_t code)
   case OP_EQ_BYTE:
     return "EQ_BYTE";
     break;
+  case OP_EQ_CHAR:
+    return "EQ_CHAR";
+    break;
+  case OP_EQ_INT:
+    return "EQ_INT";
+    break;
   case OP_EQ_HWORD:
     return "EQ_HWORD";
     break;
+  case OP_EQ_LONG:
+    return "EQ_LONG";
+    break;
   case OP_EQ_WORD:
     return "EQ_WORD";
     break;
+  case OP_LT_BYTE:
+    return "LT_BYTE";
+    break;
+  case OP_LT_CHAR:
+    return "LT_CHAR";
+    break;
+  case OP_LT_HWORD:
+    return "LT_HWORD";
+    break;
+  case OP_LT_INT:
+    return "LT_INT";
+    break;
+  case OP_LT_LONG:
+    return "LT_LONG";
+    break;
+  case OP_LT_WORD:
+    return "LT_WORD";
+    break;
+  case OP_LTE_BYTE:
+    return "LTE_BYTE";
+    break;
+  case OP_LTE_CHAR:
+    return "LTE_CHAR";
+    break;
+  case OP_LTE_HWORD:
+    return "LTE_HWORD";
+    break;
+  case OP_LTE_INT:
+    return "LTE_INT";
+    break;
+  case OP_LTE_LONG:
+    return "LTE_LONG";
+    break;
+  case OP_LTE_WORD:
+    return "LTE_WORD";
+    break;
+  case OP_GT_BYTE:
+    return "GT_BYTE";
+    break;
+  case OP_GT_CHAR:
+    return "GT_CHAR";
+    break;
+  case OP_GT_HWORD:
+    return "GT_HWORD";
+    break;
+  case OP_GT_INT:
+    return "GT_INT";
+    break;
+  case OP_GT_LONG:
+    return "GT_LONG";
+    break;
+  case OP_GT_WORD:
+    return "GT_WORD";
+    break;
+  case OP_GTE_BYTE:
+    return "GTE_BYTE";
+    break;
+  case OP_GTE_CHAR:
+    return "GTE_CHAR";
+    break;
+  case OP_GTE_HWORD:
+    return "GTE_HWORD";
+    break;
+  case OP_GTE_INT:
+    return "GTE_INT";
+    break;
+  case OP_GTE_LONG:
+    return "GTE_LONG";
+    break;
+  case OP_GTE_WORD:
+    return "GTE_WORD";
+    break;
   case OP_PLUS_BYTE:
     return "PLUS_BYTE";
     break;
@@ -189,7 +270,7 @@ void data_print(data_t datum, data_type_t type, FILE *fp)
 
 void inst_print(inst_t instruction, FILE *fp)
 {
-  static_assert(NUMBER_OF_OPCODES == 46, "inst_bytecode_size: Out of date");
+  static_assert(NUMBER_OF_OPCODES == 73, "inst_bytecode_size: Out of date");
   fprintf(fp, "%s(", opcode_as_cstr(instruction.opcode));
   if (OPCODE_IS_TYPE(instruction.opcode, OP_PUSH))
   {
@@ -219,7 +300,7 @@ void inst_print(inst_t instruction, FILE *fp)
 
 size_t inst_bytecode_size(inst_t inst)
 {
-  static_assert(NUMBER_OF_OPCODES == 46, "inst_bytecode_size: Out of date");
+  static_assert(NUMBER_OF_OPCODES == 73, "inst_bytecode_size: Out of date");
   size_t size = 1; // for opcode
   if (OPCODE_IS_TYPE(inst.opcode, OP_PUSH))
   {
@@ -243,7 +324,7 @@ size_t inst_bytecode_size(inst_t inst)
 
 void inst_write_bytecode(inst_t inst, darr_t *darr)
 {
-  static_assert(NUMBER_OF_OPCODES == 46, "inst_write_bytecode: Out of date");
+  static_assert(NUMBER_OF_OPCODES == 73, "inst_write_bytecode: Out of date");
   // Append opcode
   darr_append_byte(darr, inst.opcode);
   // Then append 0 or more operands
@@ -317,7 +398,7 @@ data_t read_type_from_darr(darr_t *darr, data_type_t type)
 
 inst_t inst_read_bytecode(darr_t *darr)
 {
-  static_assert(NUMBER_OF_OPCODES == 46, "inst_read_bytecode: Out of date");
+  static_assert(NUMBER_OF_OPCODES == 73, "inst_read_bytecode: Out of date");
   if (darr->used >= darr->available)
     return (inst_t){0};
   inst_t inst     = {0};

vm/inst.h

@@ -62,17 +62,44 @@ typedef enum
   OP_XOR_WORD,
 
   OP_EQ_BYTE,
+  OP_EQ_CHAR,
   OP_EQ_HWORD,
+  OP_EQ_INT,
+  OP_EQ_LONG,
   OP_EQ_WORD,
 
   // Mathematical operations
+  OP_LT_BYTE,
+  OP_LT_CHAR,
+  OP_LT_HWORD,
+  OP_LT_INT,
+  OP_LT_LONG,
+  OP_LT_WORD,
+  OP_LTE_BYTE,
+  OP_LTE_CHAR,
+  OP_LTE_HWORD,
+  OP_LTE_INT,
+  OP_LTE_LONG,
+  OP_LTE_WORD,
+  OP_GT_BYTE,
+  OP_GT_CHAR,
+  OP_GT_HWORD,
+  OP_GT_INT,
+  OP_GT_LONG,
+  OP_GT_WORD,
+  OP_GTE_BYTE,
+  OP_GTE_CHAR,
+  OP_GTE_HWORD,
+  OP_GTE_INT,
+  OP_GTE_LONG,
+  OP_GTE_WORD,
   OP_PLUS_BYTE,
   OP_PLUS_HWORD,
   OP_PLUS_WORD,
 
   // Simple I/O
-  OP_PRINT_CHAR,
   OP_PRINT_BYTE,
+  OP_PRINT_CHAR,
   OP_PRINT_INT,
   OP_PRINT_HWORD,
   OP_PRINT_LONG,
@@ -143,6 +170,10 @@ inst_t *insts_read_bytecode_file(FILE *, size_t *);
 #define INST_AND(TYPE)  ((inst_t){.opcode = OP_AND_##TYPE})
 #define INST_XOR(TYPE)  ((inst_t){.opcode = OP_XOR_##TYPE})
 #define INST_EQ(TYPE)   ((inst_t){.opcode = OP_EQ_##TYPE})
+#define INST_LT(TYPE)   ((inst_t){.opcode = OP_LT_##TYPE})
+#define INST_LTE(TYPE)  ((inst_t){.opcode = OP_LTE_##TYPE})
+#define INST_GT(TYPE)   ((inst_t){.opcode = OP_GT_##TYPE})
+#define INST_GTE(TYPE)  ((inst_t){.opcode = OP_GTE_##TYPE})
 #define INST_PLUS(TYPE) ((inst_t){.opcode = OP_PLUS_##TYPE})
 
 #define INST_JUMP_ABS(OP) \