mirror of
https://github.com/ZDoom/Raze.git
synced 2024-11-16 01:11:44 +00:00
60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
#ifndef __M_FIXED__
|
|
#define __M_FIXED__
|
|
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include "basics.h"
|
|
|
|
|
|
__forceinline constexpr int32_t MulScale(int32_t a, int32_t b, int32_t shift) { return (int32_t)(((int64_t)a * b) >> shift); }
|
|
__forceinline constexpr int32_t DMulScale(int32_t a, int32_t b, int32_t c, int32_t d, int32_t shift) { return (int32_t)(((int64_t)a * b + (int64_t)c * d) >> shift); }
|
|
__forceinline constexpr int32_t DivScale(int32_t a, int32_t b, int shift) { return (int32_t)(((int64_t)a << shift) / b); }
|
|
__forceinline constexpr int64_t DivScaleL(int64_t a, int64_t b, int shift) { return ((a << shift) / b); }
|
|
|
|
#include "xs_Float.h"
|
|
|
|
template<int b = 16>
|
|
constexpr fixed_t FloatToFixed(double f)
|
|
{
|
|
return int(f * (1 << b));
|
|
}
|
|
|
|
constexpr fixed_t FloatToFixed(double f, int b)
|
|
{
|
|
return int(f * (1 << b));
|
|
}
|
|
|
|
template<int b = 16>
|
|
inline constexpr fixed_t IntToFixed(int32_t f)
|
|
{
|
|
return f << b;
|
|
}
|
|
|
|
template<int b = 16>
|
|
inline constexpr double FixedToFloat(fixed_t f)
|
|
{
|
|
return f * (1. / (1 << b));
|
|
}
|
|
|
|
inline constexpr double FixedToFloat(fixed_t f, int b)
|
|
{
|
|
return f * (1. / (1 << b));
|
|
}
|
|
|
|
template<int b = 16>
|
|
inline constexpr int32_t FixedToInt(fixed_t f)
|
|
{
|
|
return (f + (1 << (b-1))) >> b;
|
|
}
|
|
|
|
inline unsigned FloatToAngle(double f)
|
|
{
|
|
return xs_CRoundToInt((f)* (0x40000000 / 90.));
|
|
}
|
|
|
|
#define FLOAT2FIXED(f) FloatToFixed(f)
|
|
#define FIXED2FLOAT(f) float(FixedToFloat(f))
|
|
#define FIXED2DBL(f) FixedToFloat(f)
|
|
|
|
|
|
#endif
|