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| author | Markos Chandras <markos.chandras@imgtec.com> | 2015-01-08 12:55:20 +0100 |
|---|---|---|
| committer | Markos Chandras <markos.chandras@imgtec.com> | 2015-02-17 16:37:35 +0100 |
| commit | 28d6f93d201d20ce47a9e8414655569a78f0353c (patch) | |
| tree | 6e5465688702428258d063ab763a33f685d8dc1a /arch/mips | |
| parent | MIPS: Emulate the new MIPS R6 BEQZC and JIC instructions (diff) | |
| download | linux-28d6f93d201d20ce47a9e8414655569a78f0353c.tar.xz linux-28d6f93d201d20ce47a9e8414655569a78f0353c.zip | |
MIPS: Emulate the new MIPS R6 BNEZC and JIALC instructions
MIPS R6 uses the <R6 sdc2 opcode for the new BNEZC and JIALC instructions
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/uapi/asm/inst.h | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/branch.c | 10 | ||||
| -rw-r--r-- | arch/mips/math-emu/cp1emu.c | 9 |
3 files changed, 20 insertions, 1 deletions
diff --git a/arch/mips/include/uapi/asm/inst.h b/arch/mips/include/uapi/asm/inst.h index 721f8fe705a4..fc0cf5ac0cf7 100644 --- a/arch/mips/include/uapi/asm/inst.h +++ b/arch/mips/include/uapi/asm/inst.h @@ -34,7 +34,7 @@ enum major_op { ll_op, lwc1_op, lwc2_op, bc6_op = lwc2_op, pref_op, lld_op, ldc1_op, ldc2_op, beqzcjic_op = ldc2_op, ld_op, sc_op, swc1_op, swc2_op, balc6_op = swc2_op, major_3b_op, - scd_op, sdc1_op, sdc2_op, sd_op + scd_op, sdc1_op, sdc2_op, bnezcjialc_op = sdc2_op, sd_op }; /* diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c index c61a41df3363..249c61c9acf1 100644 --- a/arch/mips/kernel/branch.c +++ b/arch/mips/kernel/branch.c @@ -807,6 +807,16 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, /* Compact branch: BEQZC || JIC */ regs->cp0_epc += 8; break; + case bnezcjialc_op: + if (!cpu_has_mips_r6) { + ret = -SIGILL; + break; + } + /* Compact branch: BNEZC || JIALC */ + if (insn.i_format.rs) + regs->regs[31] = epc + 4; + regs->cp0_epc += 8; + break; #endif case cbcond0_op: case cbcond1_op: diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index f00af84f017d..6e7920b20822 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -686,6 +686,15 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, dec_insn.next_pc_inc; return 1; + case bnezcjialc_op: + if (!cpu_has_mips_r6) + break; + if (!insn.i_format.rs) + regs->regs[31] = regs->cp0_epc + 4; + *contpc = regs->cp0_epc + dec_insn.pc_inc + + dec_insn.next_pc_inc; + + return 1; #endif case cop0_op: case cop1_op: |