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Rewrote next_highest_power_of_2 as a template as OSX had issues with

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the previous implementation.
This commit is contained in:
bubnikv 2017-03-28 18:02:26 +02:00
parent 2da3388aa5
commit 4bbb1f4b63
1 changed files with 8 additions and 16 deletions
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24
xs/src/libslic3r/Utils.hpp
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@ -8,28 +8,20 @@ extern void trace(unsigned int level, const char *message);
// Compute the next highest power of 2 of 32-bit v
// http://graphics.stanford.edu/~seander/bithacks.html
inline uint32_t next_highest_power_of_2(uint32_t v)
template<typename T>
inline T next_highest_power_of_2(T v)
{
if (v != 0)
-- v;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
return ++ v;
}
inline uint64_t next_highest_power_of_2(uint64_t v)
{
if (v != 0)
-- v;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v |= v >> 32;
if (sizeof(T) >= sizeof(uint16_t))
v |= v >> 8;
if (sizeof(T) >= sizeof(uint32_t))
v |= v >> 16;
if (sizeof(T) >= sizeof(uint64_t))
v |= v >> 32;
return ++ v;
}