branch.h 794 B

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  1. /*
  2. * This file is subject to the terms and conditions of the GNU General Public
  3. * License. See the file "COPYING" in the main directory of this archive
  4. * for more details.
  5. *
  6. * Copyright (C) 1996, 1997, 1998, 2001 by Ralf Baechle
  7. */
  8. #ifndef _ASM_BRANCH_H
  9. #define _ASM_BRANCH_H
  10. #include <asm/ptrace.h>
  11. static inline int delay_slot(struct pt_regs *regs)
  12. {
  13. return regs->cp0_cause & CAUSEF_BD;
  14. }
  15. static inline unsigned long exception_epc(struct pt_regs *regs)
  16. {
  17. if (!delay_slot(regs))
  18. return regs->cp0_epc;
  19. return regs->cp0_epc + 4;
  20. }
  21. extern int __compute_return_epc(struct pt_regs *regs);
  22. static inline int compute_return_epc(struct pt_regs *regs)
  23. {
  24. if (!delay_slot(regs)) {
  25. regs->cp0_epc += 4;
  26. return 0;
  27. }
  28. return __compute_return_epc(regs);
  29. }
  30. #endif /* _ASM_BRANCH_H */