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#ifndef _OPC_H
#define _OPC_H
#include <stdint.h>
/* instructions formats:
* ---------------------
*
* arithmetic:
* |000|xxx|aaaaa|bbbbb|ccccc|00000000000|
* logic:
* |001|xxx|aaaaa|bbbbb|ccccc|00000000000|
* load & store:
* |010|xxx|aaaaa|bbbbb|cccccccccccccccc|
* branch:
* |011|xxx|aaaaa|bbbbb|cccccccccccccccc|
* jump:
* |100|xxx|aaaaa|000000000000000000000|
* misc:
* |111|xxx|??????????????????????????|
*
*/
/* arithmetic */
#define OPC_ADD 000
#define OPC_SUB 001
#define OPC_MUL 002
#define OPC_DIV 003
#define OPC_MOD 004
#define OPC_SHL 005
#define OPC_SHR 006
/* logic */
#define OPC_AND 010
#define OPC_OR 011
#define OPC_XOR 012
#define OPC_NOR 013
/* load & store */
#define OPC_MOV 020
#define OPC_LB 021
#define OPC_LH 022
#define OPC_LW 023
#define OPC_SB 024
#define OPC_SH 025
#define OPC_SW 026
/* branch instructions */
#define OPC_CMP 030
#define OPC_BEQ 031
#define OPC_BNE 032
#define OPC_BLT 033
#define OPC_BGE 034
#define OPC_BLE 035
#define OPC_BGT 036
/* jump instructions */
#define OPC_J 040
#define OPC_JAL 041
/* misc */
#define OPC_SYS 070
/* conversion functions */
uint32_t mnemonic2opc(const char *mnemonic);
const char *opc2mnemonic(uint32_t IR);
#endif
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