diff options
Diffstat (limited to 'src/lem_interp/interp_lib.lem')
| -rw-r--r-- | src/lem_interp/interp_lib.lem | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/src/lem_interp/interp_lib.lem b/src/lem_interp/interp_lib.lem index 9df2d3c1..cbe5ae53 100644 --- a/src/lem_interp/interp_lib.lem +++ b/src/lem_interp/interp_lib.lem @@ -8,10 +8,10 @@ open import Word open import Bool -let add_carry_out i1 i2 result = +let add_carry_out (i1:integer) (i2:integer) (result:integer) = if (i1 < 0 && i2 < 0) then if result >= 0 then true else false - else (if i1 > 0 && i2 > 0) + else if (i1 > 0 && i2 > 0) then if result <= 0 then true else false else if i1 < 0 then if (abs i1) > i2 && result > 0 then true else false @@ -19,7 +19,7 @@ let add_carry_out i1 i2 result = then if (abs i2) > i1 && result < 0 then true else false else false -let mult_carry_out i1 i2 result = +let mult_carry_out (i1:integer) (i2:integer) (result:integer) = if (i1 < 0 && i2 < 0) || (i1 > 0 && i2 > 0) then if result <= 0 then true else false else if result > 0 then true else false @@ -313,7 +313,7 @@ let rec arith_op_vec_vec_range op sign (V_tuple [vl;vr]) = | (_,V_unknown) -> V_unknown end in binary_taint arith_op_help vl vr -let rec arith_op_overflow_vec op sign size (V_tuple [vl;vr]) = +let rec arith_op_overflow_vec op over_typ sign size (V_tuple [vl;vr]) = let overflow_help vl vr = match (vl,vr) with | (V_vector b ord cs1,V_vector _ _ cs2) -> @@ -333,7 +333,14 @@ let rec arith_op_overflow_vec op sign size (V_tuple [vl;vr]) = (n' >= (get_min_representable_in act_size)) then V_lit (L_aux L_zero ln) else V_lit (L_aux L_one ln) end) in - let c_out = carry_out (List.map detaint cs1) (List.map detaint cs2) (V_lit (L_aux L_zero Unknown)) in + let out_num = to_num sign correct_size_num in + let c_out = + match (l1_sign,l2_sign,out_num) with + | (V_lit (L_aux (L_num n1) _),V_lit (L_aux (L_num n2) _), V_lit (L_aux (L_num r) _)) -> + if (over_typ = "+" && add_carry_out n1 n2 r) || (over_typ = "*" && mult_carry_out n1 n2 r) + then V_lit (L_aux L_one Unknown) + else V_lit (L_aux L_zero Unknown) + | _ -> carry_out (List.map detaint cs1) (List.map detaint cs2) (V_lit (L_aux L_zero Unknown)) end in V_tuple [correct_size_num;overflow;c_out] | (V_unknown,_) -> V_tuple [V_unknown;V_unknown;V_unknown] | (_,V_unknown) -> V_tuple [V_unknown;V_unknown;V_unknown] @@ -568,7 +575,7 @@ let function_map = [ ("add_range_vec_range", arith_op_range_vec_range (+) Unsigned); ("add_vec_vec_range", arith_op_vec_vec_range (+) Unsigned); ("add_vec_bit", arith_op_vec_bit (+) Unsigned 1); - ("add_overflow_vec", arith_op_overflow_vec (+) Unsigned 1); + ("add_overflow_vec", arith_op_overflow_vec (+) "+" Unsigned 1); ("add_signed", arith_op (+)); ("add_vec_signed", arith_op_vec (+) Signed 1); ("add_vec_range_signed", arith_op_vec_range (+) Signed 1); @@ -577,7 +584,7 @@ let function_map = [ ("add_range_vec_range_signed", arith_op_range_vec_range (+) Signed); ("add_vec_vec_range_signed", arith_op_vec_vec_range (+) Signed); ("add_vec_bit_signed", arith_op_vec_bit (+) Signed 1); - ("add_overflow_vec_signed", arith_op_overflow_vec (+) Signed 1); + ("add_overflow_vec_signed", arith_op_overflow_vec (+) "+" Signed 1); ("add_overflow_vec_bit_signed", arith_op_overflow_vec_bit (+) Signed 1); ("minus", arith_op (-)); ("minus_vec", arith_op_vec (-) Unsigned 1); @@ -586,16 +593,16 @@ let function_map = [ ("minus_vec_range_range", arith_op_vec_range_range (-) Unsigned); ("minus_range_vec_range", arith_op_range_vec_range (-) Unsigned); ("minus_vec_bit", arith_op_vec_bit (-) Unsigned 1); - ("minus_overflow_vec", arith_op_overflow_vec (-) Unsigned 1); + ("minus_overflow_vec", arith_op_overflow_vec (-) "+" Unsigned 1); ("multiply", arith_op ( * )); ("multiply_vec", arith_op_vec ( * ) Unsigned 2); ("mult_range_vec", arith_op_range_vec ( * ) Unsigned 2); ("mult_vec_range", arith_op_vec_range ( * ) Unsigned 2); - ("mult_overflow_vec", arith_op_overflow_vec ( * ) Unsigned 2); + ("mult_overflow_vec", arith_op_overflow_vec ( * ) "*" Unsigned 2); ("multiply_vec_signed", arith_op_vec ( * ) Signed 2); ("mult_range_vec_signed", arith_op_range_vec ( * ) Signed 2); ("mult_vec_range_signed", arith_op_vec_range ( * ) Signed 2); - ("mult_overflow_vec_signed", arith_op_overflow_vec ( * ) Signed 2); + ("mult_overflow_vec_signed", arith_op_overflow_vec ( * ) "*" Signed 2); ("bitwise_leftshift", shift_op_vec "<<"); ("bitwise_rightshift", shift_op_vec ">>"); ("bitwise_rotate", shift_op_vec "<<<"); |