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Rasterizer: Get rid of a trivial pointer cast

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Lioncash
2015-10-10 16:16:48 -04:00
parent 7134d727bf
commit 9b921c2e7c
1 changed files with 14 additions and 12 deletions
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26
Source/Core/VideoBackends/Software/Rasterizer.cpp
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@ -3,6 +3,7 @@
// Refer to the license.txt file included. // Refer to the license.txt file included.
#include <algorithm> #include <algorithm>
#include <cstring>
#include "Common/CommonTypes.h" #include "Common/CommonTypes.h"
#include "VideoBackends/Software/BPMemLoader.h" #include "VideoBackends/Software/BPMemLoader.h"
@ -15,22 +16,10 @@
#include "VideoBackends/Software/XFMemLoader.h" #include "VideoBackends/Software/XFMemLoader.h"
#include "VideoCommon/BoundingBox.h" #include "VideoCommon/BoundingBox.h"
#define BLOCK_SIZE 2 #define BLOCK_SIZE 2
#define CLAMP(x, a, b) (x>b)?b:(x<a)?a:x #define CLAMP(x, a, b) (x>b)?b:(x<a)?a:x
// returns approximation of log2(f) in s28.4
// results are close enough to use for LOD
static inline s32 FixedLog2(float f)
{
u32 *x = (u32*)&f;
s32 logInt = ((*x & 0x7F800000) >> 19) - 2032; // integer part
s32 logFract = (*x & 0x007fffff) >> 19; // approximate fractional part
return logInt + logFract;
}
namespace Rasterizer namespace Rasterizer
{ {
static Slope ZSlope; static Slope ZSlope;
@ -83,6 +72,19 @@ void Init()
ZSlope.f0 = 1.f; ZSlope.f0 = 1.f;
} }
// Returns approximation of log2(f) in s28.4
// results are close enough to use for LOD
static s32 FixedLog2(float f)
{
u32 x;
std::memcpy(&x, &f, sizeof(u32));
s32 logInt = ((x & 0x7F800000) >> 19) - 2032; // integer part
s32 logFract = (x & 0x007fffff) >> 19; // approximate fractional part
return logInt + logFract;
}
static inline int iround(float x) static inline int iround(float x)
{ {
int t = (int)x; int t = (int)x;