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 #include <asm/inst.h> 13 14 static inline int delay_slot(struct pt_regs *regs) 15 { 16 return regs->cp0_cause & CAUSEF_BD; 17 } 18 19 static inline unsigned long exception_epc(struct pt_regs *regs) 20 { 21 if (!delay_slot(regs)) 22 return regs->cp0_epc; 23 24 return regs->cp0_epc + 4; 25 } 26 27 #define BRANCH_LIKELY_TAKEN 0x0001 28 29 extern int __compute_return_epc(struct pt_regs *regs); 30 extern int __compute_return_epc_for_insn(struct pt_regs *regs, 31 union mips_instruction insn); 32 33 static inline int compute_return_epc(struct pt_regs *regs) 34 { 35 if (!delay_slot(regs)) { 36 regs->cp0_epc += 4; 37 return 0; 38 } 39 40 return __compute_return_epc(regs); 41 } 42 43 #endif /* _ASM_BRANCH_H */ 44