1 files changed, 42 insertions, 0 deletions
diff --git a/instruction.h b/instruction.h
new file mode 100644
index 0000000..2e10ed6
--- /dev/null
+++ b/instruction.h
@@ -0,0 +1,42 @@
+#ifndef INSTRUCTION_H
+#define INSTRUCTION_H
+
+#include <stdint.h>
+
+typedef struct {
+	unsigned int op: 6;
+	unsigned int rs: 5;
+	unsigned int rt: 5;
+	unsigned int rd: 5;
+	unsigned int shamt: 5;
+	unsigned int func: 6;
+} rtype_t;
+
+typedef struct {
+	unsigned int op: 6;
+	unsigned int rs: 5;
+	unsigned int rt: 5;
+	unsigned int imm: 16;
+} itype_t;
+
+typedef struct {
+	unsigned int op: 6;
+	unsigned int addr: 26;
+} jtype_t;
+
+typedef enum { NOP, RTYPE, ITYPE, JTYPE } type_t;
+
+typedef struct {
+	type_t type;
+	union {
+		rtype_t r;
+		jtype_t j;
+		itype_t i;
+		uint32_t value;
+	};
+} inst_t;
+
+void InstFetch(inst_t *inst);
+void InstExec(const inst_t inst);
+
+#endif