diff options
Diffstat (limited to 'target-mips/op_helper.c')
| -rw-r--r-- | target-mips/op_helper.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/target-mips/op_helper.c b/target-mips/op_helper.c index 4704216834..27651a4a00 100644 --- a/target-mips/op_helper.c +++ b/target-mips/op_helper.c @@ -1297,7 +1297,19 @@ void helper_mtc0_srsconf4(CPUMIPSState *env, target_ulong arg1) void helper_mtc0_hwrena(CPUMIPSState *env, target_ulong arg1) { - env->CP0_HWREna = arg1 & 0x0000000F; + uint32_t mask = 0x0000000F; + + if (env->CP0_Config3 & (1 << CP0C3_ULRI)) { + mask |= (1 << 29); + + if (arg1 & (1 << 29)) { + env->hflags |= MIPS_HFLAG_HWRENA_ULR; + } else { + env->hflags &= ~MIPS_HFLAG_HWRENA_ULR; + } + } + + env->CP0_HWREna = arg1 & mask; } void helper_mtc0_count(CPUMIPSState *env, target_ulong arg1) |