xref: /openbmc/linux/arch/mips/include/asm/branch.h (revision 9ac8d3fb)
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 */
39