diff options
Diffstat (limited to 'arch/mips/kernel/branch.c')
| -rw-r--r-- | arch/mips/kernel/branch.c | 41 |
1 files changed, 25 insertions, 16 deletions
diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c index e48f6c0a9e4a..180ad081afcf 100644 --- a/arch/mips/kernel/branch.c +++ b/arch/mips/kernel/branch.c @@ -58,9 +58,6 @@ int __mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, unsigned long *contpc) { union mips_instruction insn = (union mips_instruction)dec_insn.insn; - int bc_false = 0; - unsigned int fcr31; - unsigned int bit; if (!cpu_has_mmips) return 0; @@ -139,8 +136,13 @@ int __mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, dec_insn.pc_inc + dec_insn.next_pc_inc; return 1; +#ifdef CONFIG_MIPS_FP_SUPPORT case mm_bc2f_op: - case mm_bc1f_op: + case mm_bc1f_op: { + int bc_false = 0; + unsigned int fcr31; + unsigned int bit; + bc_false = 1; /* Fall through */ case mm_bc2t_op: @@ -167,6 +169,8 @@ int __mm_isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, dec_insn.pc_inc + dec_insn.next_pc_inc; return 1; } +#endif /* CONFIG_MIPS_FP_SUPPORT */ + } break; case mm_pool16c_op: switch (insn.mm_i_format.rt) { @@ -416,8 +420,8 @@ int __MIPS16e_compute_return_epc(struct pt_regs *regs) int __compute_return_epc_for_insn(struct pt_regs *regs, union mips_instruction insn) { - unsigned int bit, fcr31, dspcontrol, reg; long epc = regs->cp0_epc; + unsigned int dspcontrol; int ret = 0; switch (insn.i_format.opcode) { @@ -447,6 +451,7 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, case bltzl_op: if (NO_R6EMU) goto sigill_r2r6; + /* fall through */ case bltz_op: if ((long)regs->regs[insn.i_format.rs] < 0) { epc = epc + 4 + (insn.i_format.simmediate << 2); @@ -460,6 +465,7 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, case bgezl_op: if (NO_R6EMU) goto sigill_r2r6; + /* fall through */ case bgez_op: if ((long)regs->regs[insn.i_format.rs] >= 0) { epc = epc + 4 + (insn.i_format.simmediate << 2); @@ -555,6 +561,7 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, case jalx_op: case jal_op: regs->regs[31] = regs->cp0_epc + 8; + /* fall through */ case j_op: epc += 4; epc >>= 28; @@ -571,6 +578,7 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, case beql_op: if (NO_R6EMU) goto sigill_r2r6; + /* fall through */ case beq_op: if (regs->regs[insn.i_format.rs] == regs->regs[insn.i_format.rt]) { @@ -585,6 +593,7 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, case bnel_op: if (NO_R6EMU) goto sigill_r2r6; + /* fall through */ case bne_op: if (regs->regs[insn.i_format.rs] != regs->regs[insn.i_format.rt]) { @@ -599,6 +608,7 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, case blezl_op: /* not really i_format */ if (!insn.i_format.rt && NO_R6EMU) goto sigill_r2r6; + /* fall through */ case blez_op: /* * Compact branches for R6 for the @@ -634,6 +644,7 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, case bgtzl_op: if (!insn.i_format.rt && NO_R6EMU) goto sigill_r2r6; + /* fall through */ case bgtz_op: /* * Compact branches for R6 for the @@ -667,23 +678,18 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, regs->cp0_epc = epc; break; +#ifdef CONFIG_MIPS_FP_SUPPORT /* * And now the FPA/cp1 branch instructions. */ - case cop1_op: + case cop1_op: { + unsigned int bit, fcr31, reg; + if (cpu_has_mips_r6 && ((insn.i_format.rs == bc1eqz_op) || (insn.i_format.rs == bc1nez_op))) { - if (!used_math()) { /* First time FPU user */ - ret = init_fpu(); - if (ret && NO_R6EMU) { - ret = -ret; - break; - } - ret = 0; - set_used_math(); - } - lose_fpu(1); /* Save FPU state for the emulator. */ + if (!init_fp_ctx(current)) + lose_fpu(1); reg = insn.i_format.rt; bit = get_fpr32(¤t->thread.fpu.fpr[reg], 0) & 0x1; if (insn.i_format.rs == bc1eqz_op) @@ -736,6 +742,9 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, } break; } + } +#endif /* CONFIG_MIPS_FP_SUPPORT */ + #ifdef CONFIG_CPU_CAVIUM_OCTEON case lwc2_op: /* This is bbit0 on Octeon */ if ((regs->regs[insn.i_format.rs] & (1ull<<insn.i_format.rt)) |