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MIPS: Emulate the new MIPS R6 BOVC, BEQC and BEQZALC instructions

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MIPS R6 uses the <R6 ADDI opcode for the new BOVC, BEQC and
BEQZALC instructions.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
This commit is contained in:
Markos Chandras
2014-11-26 14:08:52 +00:00
parent 8467ca0122
commit c893ce38b2
3 changed files with 21 additions and 1 deletions
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11
arch/mips/kernel/branch.c
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@@ -790,6 +790,17 @@ int __compute_return_epc_for_insn(struct pt_regs *regs,
regs->cp0_epc += 8;
break;
#endif
case cbcond0_op:
/* Only valid for MIPS R6 */
if (!cpu_has_mips_r6) {
ret = -SIGILL;
break;
}
/* Compact branches: bovc, beqc, beqzalc */
if (insn.i_format.rt && !insn.i_format.rs)
regs->regs[31] = epc + 4;
regs->cp0_epc += 8;
break;
}
return ret;