1 files changed, 176 insertions, 0 deletions
diff --git a/lib/prog.h b/lib/prog.h
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+/* Copyright (C) 2024 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: 2024-04-14
+ * Author: Aryadev Chavali
+ * Description: Structures for both instructions and programs for the
+ * virtual machine
+ */
+
+#ifndef PROG_H
+#define PROG_H
+
+#include <lib/base.h>
+
+typedef enum
+{
+  OP_NOOP = 0,
+
+  // Dealing with data and registers
+  OP_PUSH_BYTE,
+  OP_PUSH_HWORD,
+  OP_PUSH_WORD,
+
+  OP_POP_BYTE,
+  OP_POP_HWORD,
+  OP_POP_WORD,
+
+  OP_PUSH_REGISTER_BYTE,
+  OP_PUSH_REGISTER_HWORD,
+  OP_PUSH_REGISTER_WORD,
+
+  OP_MOV_BYTE,
+  OP_MOV_HWORD,
+  OP_MOV_WORD,
+
+  OP_DUP_BYTE,
+  OP_DUP_HWORD,
+  OP_DUP_WORD,
+
+  // Dealing with the heap
+  OP_MALLOC_BYTE,
+  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,
+
+  OP_MSET_STACK_BYTE,
+  OP_MSET_STACK_HWORD,
+  OP_MSET_STACK_WORD,
+
+  OP_MGET_BYTE,
+  OP_MGET_HWORD,
+  OP_MGET_WORD,
+
+  OP_MGET_STACK_BYTE,
+  OP_MGET_STACK_HWORD,
+  OP_MGET_STACK_WORD,
+
+  OP_MDELETE,
+  OP_MSIZE,
+
+  // Boolean operations
+  OP_NOT_BYTE,
+  OP_NOT_HWORD,
+  OP_NOT_WORD,
+
+  OP_OR_BYTE,
+  OP_OR_HWORD,
+  OP_OR_WORD,
+
+  OP_AND_BYTE,
+  OP_AND_HWORD,
+  OP_AND_WORD,
+
+  OP_XOR_BYTE,
+  OP_XOR_HWORD,
+  OP_XOR_WORD,
+
+  OP_EQ_BYTE,
+  OP_EQ_HWORD,
+  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,
+
+  OP_SUB_BYTE,
+  OP_SUB_HWORD,
+  OP_SUB_WORD,
+
+  OP_MULT_BYTE,
+  OP_MULT_HWORD,
+  OP_MULT_WORD,
+
+  // Simple I/O
+  OP_PRINT_BYTE,
+  OP_PRINT_CHAR,
+  OP_PRINT_HWORD,
+  OP_PRINT_INT,
+  OP_PRINT_LONG,
+  OP_PRINT_WORD,
+
+  // Program control flow
+  OP_JUMP_ABS,
+  OP_JUMP_STACK,
+  OP_JUMP_IF_BYTE,
+  OP_JUMP_IF_HWORD,
+  OP_JUMP_IF_WORD,
+  // Subroutines
+  OP_CALL,
+  OP_CALL_STACK,
+  OP_RET,
+
+  // Should not be an opcode
+  NUMBER_OF_OPCODES,
+  OP_HALT = 0b11111111, // top of the byte is a HALT
+} opcode_t;
+
+typedef struct
+{
+  opcode_t opcode;
+  data_t operand;
+} inst_t;
+
+typedef struct
+{
+  word start_address;
+} prog_header_t;
+
+typedef struct
+{
+  prog_header_t header;
+  word count;
+  inst_t instructions[];
+} prog_t;
+
+#endif