Added instructions for MALLOC_STACK and SUB

MALLOC_STACK is a stack based version of MALLOC, SUB does subtraction.

lib/inst.c

@@ -59,6 +59,12 @@ const char *opcode_as_cstr(opcode_t code)
     return "MALLOC_HWORD";
   case OP_MALLOC_WORD:
     return "MALLOC_WORD";
+  case OP_MALLOC_STACK_BYTE:
+    return "MALLOC_STACK_BYTE";
+  case OP_MALLOC_STACK_HWORD:
+    return "MALLOC_STACK_HWORD";
+  case OP_MALLOC_STACK_WORD:
+    return "MALLOC_STACK_WORD";
   case OP_MSET_BYTE:
     return "MSET_BYTE";
   case OP_MSET_HWORD:
@@ -171,6 +177,12 @@ const char *opcode_as_cstr(opcode_t code)
     return "PLUS_HWORD";
   case OP_PLUS_WORD:
     return "PLUS_WORD";
+  case OP_SUB_BYTE:
+    return "SUB_BYTE";
+  case OP_SUB_HWORD:
+    return "SUB_HWORD";
+  case OP_SUB_WORD:
+    return "SUB_WORD";
   case OP_MULT_BYTE:
     return "MULT_BYTE";
   case OP_MULT_HWORD:
@@ -229,7 +241,7 @@ 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-  static_assert(NUMBER_OF_OPCODES == 90, "inst_bytecode_size: Out of date");
+  static_assert(NUMBER_OF_OPCODES == 96, "inst_bytecode_size: Out of date");
   fprintf(fp, "%s(", opcode_as_cstr(instruction.opcode));
   if (OPCODE_IS_TYPE(instruction.opcode, OP_PUSH))
   {
@@ -262,7 +274,7 @@ void inst_print(inst_t instruction, FILE *fp)
 
 size_t inst_bytecode_size(inst_t inst)
 {
-  static_assert(NUMBER_OF_OPCODES == 90, "inst_bytecode_size: Out of date");
+  static_assert(NUMBER_OF_OPCODES == 96, "inst_bytecode_size: Out of date");
   size_t size = 1; // for opcode
   if (OPCODE_IS_TYPE(inst.opcode, OP_PUSH))
   {
@@ -287,7 +299,7 @@ size_t inst_bytecode_size(inst_t inst)
 
 void inst_write_bytecode(inst_t inst, darr_t *darr)
 {
-  static_assert(NUMBER_OF_OPCODES == 90, "inst_write_bytecode: Out of date");
+  static_assert(NUMBER_OF_OPCODES == 96, "inst_write_bytecode: Out of date");
   // Append opcode
   darr_append_byte(darr, inst.opcode);
   // Then append 0 or more operands
@@ -363,7 +375,7 @@ 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-  static_assert(NUMBER_OF_OPCODES == 90, "inst_read_bytecode: Out of date");
+  static_assert(NUMBER_OF_OPCODES == 96, "inst_read_bytecode: Out of date");
   if (darr->used >= darr->available)
     return (inst_t){0};
   inst_t inst     = {0};

lib/inst.h

@@ -49,6 +49,10 @@ typedef enum
   OP_MALLOC_HWORD,
   OP_MALLOC_WORD,
 
+  OP_MALLOC_STACK_BYTE,
+  OP_MALLOC_STACK_HWORD,
+  OP_MALLOC_STACK_WORD,
+
   OP_MSET_BYTE,
   OP_MSET_HWORD,
   OP_MSET_WORD,
@@ -122,6 +126,10 @@ typedef enum
   OP_PLUS_HWORD,
   OP_PLUS_WORD,
 
+  OP_SUB_BYTE,
+  OP_SUB_HWORD,
+  OP_SUB_WORD,
+
   OP_MULT_BYTE,
   OP_MULT_HWORD,
   OP_MULT_WORD,
@@ -196,6 +204,7 @@ inst_t *insts_read_bytecode_file(FILE *, size_t *);
 
 #define INST_MALLOC(TYPE, OP) \
   ((inst_t){.opcode = OP_MALLOC_##TYPE, .operand = DWORD(OP)})
+#define INST_MALLOC_STACK(TYPE) ((inst_t){.opcode = OP_MALLOC_STACK_##TYPE})
 #define INST_MSET(TYPE, OP) \
   ((inst_t){.opcode = OP_MSET_##TYPE, .operand = DWORD(OP)})
 #define INST_MSET_STACK(TYPE) ((inst_t){.opcode = OP_MSET_STACK_##TYPE})
@@ -215,6 +224,7 @@ inst_t *insts_read_bytecode_file(FILE *, size_t *);
 #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_SUB(TYPE)  ((inst_t){.opcode = OP_SUB_##TYPE})
 #define INST_MULT(TYPE) ((inst_t){.opcode = OP_MULT_##TYPE})
 
 #define INST_JUMP_ABS(OP) \