79 lines
2.2 KiB
C++
Executable File
79 lines
2.2 KiB
C++
Executable File
#pragma once
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#include <stdint.h>
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#include <fixpoint/ieee.h>
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typedef int64_t fp4816_t;
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#define FP4816_FRAC 16
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#define FP4816_MASK (0xFFFFFFFFFFFFFFFF >> (64-FP4816_FRAC))
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float fp4816_to_float (fp4816_t value);
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fp4816_t fp4816_from_float (float value);
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#define fp4816_from_float_c( value ) ((fp4816_t)(value * 65536.0f))
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static inline fp4816_t fp4816_from_int32 (int32_t value) { return (fp4816_t)(((fp4816_t)value) << FP4816_FRAC); };
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static inline int32_t fp4816_to_int32 (fp4816_t value) { return (int32_t)(value >> 16); };
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static inline fp4816_t fp4816_fraction (fp4816_t value) { return value & FP4816_MASK; };
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static inline fp4816_t fp4816_add ( fp4816_t a, fp4816_t b ) { return a + b; };
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static inline fp4816_t fp4816_sub ( fp4816_t a, fp4816_t b ) { return a - b; };
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static inline fp4816_t fp4816_mul ( fp4816_t a, fp4816_t b ) { return (fp4816_t)( ((int64_t)a * (int64_t)b) >> FP4816_FRAC ); };
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static inline fp4816_t fp4816_div ( fp4816_t a, fp4816_t b ) { return (fp4816_t)( ((int64_t)a << FP4816_FRAC) / b ); };
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static inline fp4816_t fp4816_abs ( fp4816_t a ) { return (a<0) ? -a : a; };
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fp4816_t fp4816_taylor (fp4816_t v,int lev);
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fp4816_t fp4816_sin_slow (fp4816_t rad);
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fp4816_t fp4816_taylor_element(fp4816_t v,int lev);
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fp4816_t fp4816_pow (fp4816_t v,int pow);
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struct _fp4816_smoother {
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fp4816_t value,
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sum,
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k;
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};
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fp4816_t fp4816_smoother(struct _fp4816_smoother *smoother,fp4816_t sample);
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static inline void fp4816_smoother_set(struct _fp4816_smoother *smoother,fp4816_t tn) {
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if (smoother) {
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smoother->value = 0;
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smoother->sum = 0;
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smoother->k = fp4816_div(65536,tn);
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};
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};
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#include <math.h>
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#define FP4816_PI fp4816_from_float_c(M_PI)
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#define FP4816_2PI (2 * FP4816_PI)
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#define FP4816_05PI (FP4816_PI / 2)
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#define FP4816_15PI (FP4816_PI + FP4816_05PI)
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#define FP_SQRT_2 fp4816_from_float_c(1.414213562373095)
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#define FP_INV_SQRT_2 fp4816_from_float_c(0.707106781)
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#define FP_SQRT_3 fp4816_from_float_c(1.73205080756887729352)
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#define FP_INV_SQRT_3 fp4816_from_float_c(0.577350269)
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#ifdef __cplusplus
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class FP4816
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{
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public:
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FP4816(int64_t value);
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FP4816(float value);
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private:
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int64_t value;
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};
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#endif
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