diff options
Diffstat (limited to 'common')
-rw-r--r-- | common/Values.v | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/common/Values.v b/common/Values.v index b937071c..05749b7f 100644 --- a/common/Values.v +++ b/common/Values.v @@ -262,6 +262,18 @@ Definition add_carry (v1 v2 cin: val): val := | _, _, _ => Vundef end. +Definition sub_overflow (v1 v2: val) : val := + match v1, v2 with + | Vint n1, Vint n2 => Vint(Int.sub_overflow n1 n2 Int.zero) + | _, _ => Vundef + end. + +Definition negative (v: val) : val := + match v with + | Vint n => Vint (Int.negative n) + | _ => Vundef + end. + Definition and (v1 v2: val): val := match v1, v2 with | Vint n1, Vint n2 => Vint(Int.and n1 n2) |