diff options
| -rw-r--r-- | target-i386/op.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/target-i386/op.c b/target-i386/op.c index 3f9afb17d3..8b28007078 100644 --- a/target-i386/op.c +++ b/target-i386/op.c @@ -980,8 +980,9 @@ void OPPROTO op_movl_drN_T0(void) void OPPROTO op_lmsw_T0(void) { - /* only 4 lower bits of CR0 are modified */ - T0 = (env->cr[0] & ~0xf) | (T0 & 0xf); + /* only 4 lower bits of CR0 are modified. PE cannot be set to zero + if already set to one. */ + T0 = (env->cr[0] & ~0xe) | (T0 & 0xf); helper_movl_crN_T0(0); } |