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https://github.com/pnx/m16vm
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70 lines
1.5 KiB
C
70 lines
1.5 KiB
C
/* instr.h
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*
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* Copyright (C) 2012,2014 Henrik Hautakoski <henrik.hautakoski@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef INSTR_H
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#define INSTR_H
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#include <stdint.h>
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/* Opcodes */
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#define OP_NOOP 0
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#define OP_ADD 1
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#define OP_MOVL 2
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#define OP_MOVH 3
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#define OP_LW 4
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#define OP_SW 5
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#define OP_BEQ 6
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#define OP_JMP 7
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#define OP_JR 8
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#define OP_INT 15
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#define OP_NONE 0xFF
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/* Register type */
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struct instr_R {
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uint8_t rs;
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uint8_t r0;
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uint8_t r1;
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};
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struct instr_RI {
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uint8_t rs;
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uint8_t r0;
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int8_t offset;
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};
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struct instr_I {
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uint8_t rs;
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int8_t imm;
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};
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struct instr_J {
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uint16_t addr;
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};
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struct instr {
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uint8_t opcode;
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union {
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struct instr_R r;
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struct instr_RI ri;
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struct instr_I i;
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struct instr_J j;
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};
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};
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#endif /* INSTR_H */
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