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2 * Copyright (c) 2008, 2012 Nicira, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
21 #include "openvswitch/util.h"
23 /* Saturating addition: overflow yields UINT_MAX. */
24 static inline unsigned int
25 sat_add(unsigned int x
, unsigned int y
)
27 return x
+ y
>= x
? x
+ y
: UINT_MAX
;
30 /* Saturating subtraction: underflow yields 0. */
31 static inline unsigned int
32 sat_sub(unsigned int x
, unsigned int y
)
34 return x
>= y
? x
- y
: 0;
37 static inline unsigned int
38 sat_mul(unsigned int x
, unsigned int y
)
40 return OVS_SAT_MUL(x
, y
);
43 #endif /* sat-math.h */