flewkey/cuberite-2a
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Made FAST_FLOOR_DIV work correctly, replaced all floorf() divisions with it.

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Still not perfect - chunk and region calculations can be made into a single CPU instruction - SAR - but not all compilers are known to support that (">>" operator on signed datatypes needs to perform arithmetic shift, C/C++ standard makes it implementation-specific; MSVC and GCC do what we need, LLVM unknown)

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1224 0a769ca7-a7f5-676a-18bf-c427514a06d6
This commit is contained in:
madmaxoft@gmail.com
2013-02-27 10:01:20 +00:00
parent 24d3d5dac4
commit 71cd0199fd
5 changed files with 14 additions and 12 deletions
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10
source/ChunkMap.cpp
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@@ -87,8 +87,8 @@ cChunkMap::cChunkLayer * cChunkMap::GetLayer(int a_LayerX, int a_LayerZ)
cChunkMap::cChunkLayer * cChunkMap::FindLayerForChunk(int a_ChunkX, int a_ChunkZ)
{
const int LayerX = (int)(floorf((float)a_ChunkX / (float)(LAYER_SIZE)));
const int LayerZ = (int)(floorf((float)a_ChunkZ / (float)(LAYER_SIZE)));
const int LayerX = FAST_FLOOR_DIV(a_ChunkX, LAYER_SIZE);
const int LayerZ = FAST_FLOOR_DIV(a_ChunkZ, LAYER_SIZE);
return FindLayer(LayerX, LayerZ);
}
@@ -118,9 +118,9 @@ cChunkMap::cChunkLayer * cChunkMap::FindLayer(int a_LayerX, int a_LayerZ)
cChunkMap::cChunkLayer * cChunkMap::GetLayerForChunk(int a_ChunkX, int a_ChunkZ)
{
const int LayerX = (int)(floorf((float)a_ChunkX / (float)(LAYER_SIZE)));
const int LayerZ = (int)(floorf((float)a_ChunkZ / (float)(LAYER_SIZE)));
return GetLayer( LayerX, LayerZ );
const int LayerX = FAST_FLOOR_DIV(a_ChunkX, LAYER_SIZE);
const int LayerZ = FAST_FLOOR_DIV(a_ChunkX, LAYER_SIZE);
return GetLayer(LayerX, LayerZ);
}