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-rw-r--r--instruction.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/instruction.h b/instruction.h
index 57fd1b6..f53c995 100644
--- a/instruction.h
+++ b/instruction.h
@@ -196,9 +196,15 @@ enum {
};
#define R_TYPE_COUNT 0x40
+#define INSTR_ERR -1
+#define PC_INC_NORMAL 0
+#define PC_INC_BY_INSTR 1
+
/* Forward declaration */
struct nios2;
-typedef uint32_t (*instruction_handler)(struct nios2 *cpu, uint32_t opcode);
+typedef int (*instruction_handler)(struct nios2 *cpu, uint32_t opcode);
+
+extern instruction_handler instruction_get_handler(uint32_t code);
#endif /* _INSTRUCTION_H_ */