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Diffstat (limited to 'arch/mips/math-emu/cp1emu.c')
-rw-r--r--arch/mips/math-emu/cp1emu.c32
1 files changed, 26 insertions, 6 deletions
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index 9bf82117b4f2..7bbaefe0434d 100644
--- a/arch/mips/math-emu/cp1emu.c
+++ b/arch/mips/math-emu/cp1emu.c
@@ -459,12 +459,18 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
switch (insn.i_format.rt) {
case bltzal_op:
case bltzall_op:
+ if (NO_R6EMU && (insn.i_format.rs ||
+ insn.i_format.rt == bltzall_op))
+ break;
+
regs->regs[31] = regs->cp0_epc +
dec_insn.pc_inc +
dec_insn.next_pc_inc;
/* Fall through */
- case bltz_op:
case bltzl_op:
+ if (NO_R6EMU)
+ break;
+ case bltz_op:
if ((long)regs->regs[insn.i_format.rs] < 0)
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
@@ -476,12 +482,18 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
return 1;
case bgezal_op:
case bgezall_op:
+ if (NO_R6EMU && (insn.i_format.rs ||
+ insn.i_format.rt == bgezall_op))
+ break;
+
regs->regs[31] = regs->cp0_epc +
dec_insn.pc_inc +
dec_insn.next_pc_inc;
/* Fall through */
- case bgez_op:
case bgezl_op:
+ if (NO_R6EMU)
+ break;
+ case bgez_op:
if ((long)regs->regs[insn.i_format.rs] >= 0)
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
@@ -508,8 +520,10 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
/* Set microMIPS mode bit: XOR for jalx. */
*contpc ^= bit;
return 1;
- case beq_op:
case beql_op:
+ if (NO_R6EMU)
+ break;
+ case beq_op:
if (regs->regs[insn.i_format.rs] ==
regs->regs[insn.i_format.rt])
*contpc = regs->cp0_epc +
@@ -520,8 +534,10 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
dec_insn.pc_inc +
dec_insn.next_pc_inc;
return 1;
- case bne_op:
case bnel_op:
+ if (NO_R6EMU)
+ break;
+ case bne_op:
if (regs->regs[insn.i_format.rs] !=
regs->regs[insn.i_format.rt])
*contpc = regs->cp0_epc +
@@ -532,8 +548,10 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
dec_insn.pc_inc +
dec_insn.next_pc_inc;
return 1;
- case blez_op:
case blezl_op:
+ if (NO_R6EMU)
+ break;
+ case blez_op:
if ((long)regs->regs[insn.i_format.rs] <= 0)
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
@@ -543,8 +561,10 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn,
dec_insn.pc_inc +
dec_insn.next_pc_inc;
return 1;
- case bgtz_op:
case bgtzl_op:
+ if (NO_R6EMU)
+ break;
+ case bgtz_op:
if ((long)regs->regs[insn.i_format.rs] > 0)
*contpc = regs->cp0_epc +
dec_insn.pc_inc +
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