#include "kernel.h"

Functions
void	enable_fpu ()
	Enable floating point operations. More...

void	enable_sse ()
	Enable SSE. More...

uint8_t	double_determine_decimal_places (double f)
	Determine the approximate number of decimal places in a double value. This uses a very simple loop which repeatedly multiplies the value by ten, until all that remains is a whole number greater than or equal to 1. More...

char *	double_to_string (double x, char *p, int64_t len, uint8_t precision)
	Convert a doubleing point number to char* string, with a specified decimal precision. More...

Detailed Description

Author: Craig Edwards (craig.nosp@m.edwa.nosp@m.rds@b.nosp@m.rain.nosp@m.box.c.nosp@m.c)

Copyright: Copyright (c) 2012-2023

Function Documentation

◆ double_determine_decimal_places()

uint8_t double_determine_decimal_places ( double f )

Determine the approximate number of decimal places in a double value. This uses a very simple loop which repeatedly multiplies the value by ten, until all that remains is a whole number greater than or equal to 1.

Parameters

f	double to count decimal places

Returns: uint8_t number of decimal places

◆ double_to_string()

char* double_to_string	(	double	x,
		char *	p,
		int64_t	len,
		uint8_t	precision
	)

Convert a doubleing point number to char* string, with a specified decimal precision.

This function retains accuraccy by converting to 64 bit integers and string representations as early as possible, then operating on fixed-point representations of the floating point number. When we deal with fixed point, we don't lose accuraccy due to rounding.

Parameters

x	Float to convert
p	Output buffer
len	Size of output buffer
precision	Precision of decimal part. Set to 0 to display full stored precision of the value.

Returns: char* pointer to value in buffer

◆ enable_fpu()

void enable_fpu ( )

Enable floating point operations.

◆ enable_sse()

void enable_sse ( )

Enable SSE.