arch/mips/include/asm/branch.h

   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
  11 #include <asm/ptrace.h>
  12
  13 static inline int delay_slot(struct pt_regs *regs)
  14 {
  15         return regs->cp0_cause & CAUSEF_BD;
  16 }
  17
  18 static inline unsigned long exception_epc(struct pt_regs *regs)
  19 {
  20         if (!delay_slot(regs))
  21                 return regs->cp0_epc;
  22
  23         return regs->cp0_epc + 4;
  24 }
  25
  26 extern int __compute_return_epc(struct pt_regs *regs);
  27
  28 static inline int compute_return_epc(struct pt_regs *regs)
  29 {
  30         if (!delay_slot(regs)) {
  31                 regs->cp0_epc += 4;
  32                 return 0;
  33         }
  34
  35         return __compute_return_epc(regs);
  36 }
  37
  38 #endif /* _ASM_BRANCH_H */