Re: [PATCH RFC 57/67] MIPS: kernel: branch: Emulate the BNVC, BNEC and BNEZLAC R6 instructions

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On 12/18/2014 07:10 AM, Markos Chandras wrote:
MIPS R6 uses the <R6 DADDI opcode for the new BNVC, BNEC and
BNEZLAC instructions.

Signed-off-by: Markos Chandras <markos.chandras@xxxxxxxxxx>
---
  arch/mips/include/uapi/asm/inst.h | 2 +-
  arch/mips/kernel/branch.c         | 2 ++
  2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/mips/include/uapi/asm/inst.h b/arch/mips/include/uapi/asm/inst.h
index b95363e0551f..096f32153ce2 100644
--- a/arch/mips/include/uapi/asm/inst.h
+++ b/arch/mips/include/uapi/asm/inst.h
@@ -25,7 +25,7 @@ enum major_op {
  	andi_op, ori_op, xori_op, lui_op,
  	cop0_op, cop1_op, cop2_op, cop1x_op,
  	beql_op, bnel_op, blezl_op, bgtzl_op,
-	daddi_op, daddiu_op, ldl_op, ldr_op,
+	daddi_or_cbcond1_op, daddiu_op, ldl_op, ldr_op,

NAK.

Same as the other one.

This is a kernel ABI document, you cannot remove symbols.



  	spec2_op, jalx_op, mdmx_op, spec3_op,
  	lb_op, lh_op, lwl_op, lw_op,
  	lbu_op, lhu_op, lwr_op, lwu_op,
diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c
index cf390c76ba95..4cc9070682e1 100644
--- a/arch/mips/kernel/branch.c
+++ b/arch/mips/kernel/branch.c
@@ -790,6 +790,8 @@ int __compute_return_epc_for_insn(struct pt_regs *regs,
  		break;
  	case addi_or_cbcond0_op:
  		/* Compact branches: bovc, beqc, beqzalc */
+	case daddi_or_cbcond1_op:
+		/* Compact branches: bnvc, bnec, bnezlac */
  		if (insn.i_format.rt && !insn.i_format.rs)
  			regs->regs[31] = epc + 4;
  		regs->cp0_epc += 8;







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