diff options
Diffstat (limited to 'arch/mips/math-emu/cp1emu.c')
-rw-r--r-- | arch/mips/math-emu/cp1emu.c | 32 |
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 + |