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MIPS: Emulate the new MIPS R6 BNVC, BNEC and BNEZLAC instructions

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MIPS R6 uses the <R6 DADDI opcode for the new BNVC, BNEC and
BNEZLAC instructions.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
This commit is contained in:
Markos Chandras
2014-11-26 15:03:54 +00:00
parent c893ce38b2
commit 10d962d534
3 changed files with 7 additions and 2 deletions
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6
arch/mips/kernel/branch.c
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@@ -791,12 +791,16 @@ int __compute_return_epc_for_insn(struct pt_regs *regs,
break;
#endif
case cbcond0_op:
case cbcond1_op:
/* Only valid for MIPS R6 */
if (!cpu_has_mips_r6) {
ret = -SIGILL;
break;
}
/* Compact branches: bovc, beqc, beqzalc */
/*
* Compact branches:
* bovc, beqc, beqzalc, bnvc, bnec, bnezlac
*/
if (insn.i_format.rt && !insn.i_format.rs)
regs->regs[31] = epc + 4;
regs->cp0_epc += 8;