arm_inlines_float.h File Reference

Floating point manipulation inlines. More...

#include <math.h>

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Data Structures
struct	sIntFrac
	Float representation on integers. More...

Macros
#define	SPLIT_FLOAT_TO_INTS(val, nb_frac)
	<

Functions
DWORD	get_fp_dec (const double f, const BYTE nb)
	Get floating point number decimal part (as absolute value)
void	float2sIntFrac (sIntFrac *const pIntFrac, const double f, const uint8_t nb_frac)
	Convert floating point representation to sIntFrac integers representation.
void	sIntFrac2float (double *const pFloat, const sIntFrac *const pIntFrac)
	Convert sIntFrac integers representation to floating point representation.

Detailed Description

Floating point manipulation inlines.

Author

SMFSW

Copyright

MIT (c) 2017-2026, SMFSW

Macro Definition Documentation

SPLIT_FLOAT_TO_INTS

#define SPLIT_FLOAT_TO_INTS	(		val,
			nb_frac )

Value:

(SDWORD) (val), get_fp_dec((val), (nb_frac))

<

Warning

Sign does not work for values between 0 and -1 (sign is lost) Split float value val into 2 integers with nb_frac fractional part digits

Function Documentation

float2sIntFrac()

void float2sIntFrac ( sIntFrac *const pIntFrac, const double f, const uint8_t nb_frac )

inline

Convert floating point representation to sIntFrac integers representation.

Parameters

[in,out]	pIntFrac	- Pointer to result structure
[in]	f	- floating point value to convert
[in]	nb_frac	- Number of decimal to get after floating point (limited to 9 internally for proper result on 32b return type)

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get_fp_dec()

DWORD get_fp_dec ( const double f, const BYTE nb )

inline

Get floating point number decimal part (as absolute value)

Note

if in need to print floats, you can add '-u _printf_float' in Linker options instead of using get_fp_dec. Otherwise, SPLIT_FLOAT_TO_INTS may be used to ease the formatting process for printf like functions.

Parameters

[in]	f	- floating point value
[in]	nb	- Number of decimal to get after floating point (limited to 9 internally for proper result on 32b return type)

Returns

nb decimal part as unsigned integer

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sIntFrac2float()

void sIntFrac2float ( double *const pFloat, const sIntFrac *const pIntFrac )

inline

Convert sIntFrac integers representation to floating point representation.

Parameters

[in,out]	pFloat	- Pointer to floating point result
[in]	pIntFrac	- Pointer to sIntFrac structure to convert