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61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
#ifndef __M_FIXED__
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#define __M_FIXED__
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#include <stdlib.h>
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#include <stdint.h>
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#include "basics.h"
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__forceinline constexpr int32_t MulScale(int32_t a, int32_t b, int32_t shift) { return (int32_t)(((int64_t)a * b) >> shift); }
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__forceinline constexpr double MulScaleF(double a, double b, int32_t shift) { return (a * b) * (1. / (uint32_t(1) << shift)); }
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__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); }
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__forceinline constexpr int32_t DivScale(int32_t a, int32_t b, int shift) { return (int32_t)(((int64_t)a << shift) / b); }
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__forceinline constexpr int64_t DivScaleL(int64_t a, int64_t b, int shift) { return ((a << shift) / b); }
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#include "xs_Float.h"
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template<int b = 16>
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constexpr fixed_t FloatToFixed(double f)
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{
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return int(f * (1 << b));
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}
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constexpr fixed_t FloatToFixed(double f, int b)
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{
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return int(f * (1 << b));
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}
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template<int b = 16>
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inline constexpr fixed_t IntToFixed(int32_t f)
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{
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return f << b;
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}
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template<int b = 16>
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inline constexpr double FixedToFloat(fixed_t f)
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{
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return f * (1. / (1 << b));
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}
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inline constexpr double FixedToFloat(fixed_t f, int b)
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{
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return f * (1. / (1 << b));
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}
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template<int b = 16>
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inline constexpr int32_t FixedToInt(fixed_t f)
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{
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return (f + (1 << (b-1))) >> b;
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}
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inline unsigned FloatToAngle(double f)
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{
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return xs_CRoundToInt((f)* (0x40000000 / 90.));
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}
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#define FLOAT2FIXED(f) FloatToFixed(f)
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#define FIXED2FLOAT(f) float(FixedToFloat(f))
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#define FIXED2DBL(f) FixedToFloat(f)
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#endif
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