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(svn r11390) -Fix r11387: AB() was wrong (spotted by Rafal Rzepecki, patch by skidd13)

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truelight
2007-11-07 22:41:50 +00:00
parent 4e518e3ceb
commit 87295922cf
1 changed files with 2 additions and 3 deletions
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5
src/macros.h
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@@ -66,9 +66,8 @@ template<typename T, typename U> static inline T SB(T& x, const uint8 s, const u
*/
template<typename T, typename U> static inline T AB(T& x, const uint8 s, const uint8 n, const U i)
{
const T tmp = (T)(((1U << n) - 1) << s);
x &= ~tmp;
x |= (T)((x + (i << s)) & tmp);
const T mask = (T)(((1U << n) - 1) << s);
x = (T)((x & ~mask) | ((x + (i << s)) & mask));
return x;
}