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| author | Markos Chandras <markos.chandras@imgtec.com> | 2014-11-26 13:56:51 +0000 |
|---|---|---|
| committer | Markos Chandras <markos.chandras@imgtec.com> | 2015-02-17 15:37:34 +0000 |
| commit | 8467ca0122e20f3f8e73d34907b8b30461af5d4e (patch) | |
| tree | b2c543790a8035ff5bde5d8a93567459eca534c7 /arch/mips/math-emu | |
| parent | f1b44067c19258b7614e3cd09dfe8d8e12ff5895 (diff) | |
| download | op-kernel-dev-8467ca0122e20f3f8e73d34907b8b30461af5d4e.zip op-kernel-dev-8467ca0122e20f3f8e73d34907b8b30461af5d4e.tar.gz | |
MIPS: Emulate the new MIPS R6 branch compact (BC) instruction
MIPS R6 uses the <R6 LWC2 opcode for the new BC instruction.
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Diffstat (limited to 'arch/mips/math-emu')
| -rw-r--r-- | arch/mips/math-emu/cp1emu.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index d6d67e2..7f373a2 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -648,6 +648,19 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, else *contpc = regs->cp0_epc + 8; return 1; +#else + case bc6_op: + /* + * Only valid for MIPS R6 but we can still end up + * here from a broken userland so just tell emulator + * this is not a branch and let it break later on. + */ + if (!cpu_has_mips_r6) + break; + *contpc = regs->cp0_epc + dec_insn.pc_inc + + dec_insn.next_pc_inc; + + return 1; #endif case cop0_op: case cop1_op: |
