diff options
Diffstat (limited to 'src/macros.h')
| -rw-r--r-- | src/macros.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/macros.h b/src/macros.h index c10ef4d49..406ae83da 100644 --- a/src/macros.h +++ b/src/macros.h @@ -51,6 +51,14 @@ static inline uint clampu(uint a, uint min, uint max) return a; } +/* Gracefully reduce a signed 64-bit int to signed 32-bit -- no bogusly truncating the sign bit */ +static inline int32 ClampToI32(int64 a) +{ + if (a <= (int32)0x80000000) return 0x80000000; + if (a >= (int32)0x7FFFFFFF) return 0x7FFFFFFF; + return (int32)a; +} + static inline int32 BIGMULSS(int32 a, int32 b, int shift) { return (int32)((int64)a * (int64)b >> shift); |