Split off instruction structure to its own file

src/inst.h

@@ -0,0 +1,40 @@
+/* Copyright (C) 2023 Aryadev Chavali
+
+ * You may distribute and modify this code under the terms of the
+ * GPLv2 license.  You should have received a copy of the GPLv2
+ * license with this file.  If not, please write to:
+ * aryadev@aryadevchavali.com.
+
+ * Created: 2023-10-15
+ * Author: Aryadev Chavali
+ * Description: Instructions and opcodes
+ */
+
+#ifndef INST_H
+#define INST_H
+
+#include "./base.h"
+
+typedef enum
+{
+  OP_PUSH_BYTE = 1,
+  OP_PUSH_WORD,
+  OP_PUSH_FLOAT,
+} op_t;
+
+typedef struct
+{
+  op_t opcode;
+  data_t operand;
+} inst_t;
+
+#define INST_BPUSH(BYTE) \
+  ((inst_t){.opcode = OP_PUSH_BYTE, .operand = DBYTE(BYTE)})
+
+#define INST_WPUSH(WORD) \
+  ((inst_t){.opcode = OP_PUSH_WORD, .operand = DWORD(WORD)})
+
+#define INST_FPUSH(FLOAT) \
+  ((inst_t){.opcode = OP_PUSH_FLOAT, .operand = DFLOAT(FLOAT)})
+
+#endif