Fixed-point Library 1.10.1

#include <std/fxpt.pat>

This namespace contains various fixed-point calculation functions

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Types

fixed

A type to represent a fixed-point number

Functions

std::fxpt::to_float(fixed fxt, u32 precision) -> double 1.10.1

Converts a fixed point number “fxt” with a precision of “precision” bits into a floating point number

Parameter	Description
fxt	Fixed point number
precision	Bits of precision
return	Floating point representation of fxt

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std::fxpt::to_fixed(double flt, u32 precision) -> fixed 1.10.1

Converts a floating point number “flt” into a fixed point number with a precision of “precision” bits

Parameter	Description
flt	Floating point number
precision	Bits of precision
return	Fixed point representation of flt

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std::fxpt::change_precision(fixed value, u32 start_precision, u32 end_precision) -> fixed 1.10.1

Converts a fixed point number “value” with a precision of “start_precision” bits into a fixed point number with a precision of “end_precision” bits

Parameter	Description
value	Fixed point number
start_precision	Bits of precision of value
end_precision	Bits of precision of the result value
return	Fixed point number with adjusted precision

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std::fxpt::add(fixed a, fixed b, u32 precision) -> fixed 1.10.1

Performs a fixed point addition of values “a” and “b” with a precision of “precision” bits

Warning

Both a and b need to have the same precision

Parameter	Description
a	Left operand
b	Right operand
precision	Bits of precision of both a and b
return	Result of a + b

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std::fxpt::subtract(fixed a, fixed b, u32 precision) -> fixed 1.10.1

Performs a fixed point subtraction of values “a” and “b” with a precision of “precision” bits

Warning

Both a and b need to have the same precision

Parameter	Description
a	Left operand
b	Right operand
precision	Bits of precision of both a and b
return	Result of a - b

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std::fxpt::multiply(fixed a, fixed b, u32 precision) -> fixed 1.10.1

Performs a fixed point multiplication of values “a” and “b” with a precision of “precision” bits

Warning

Both a and b need to have the same precision

Parameter	Description
a	Left operand
b	Right operand
precision	Bits of precision of both a and b
return	Result of a * b

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std::fxpt::divide(fixed a, fixed b, u32 precision) -> fixed 1.10.1

Performs a fixed point division of values “a” and “b” with a precision of “precision” bits

Warning

Both a and b need to have the same precision

Parameter	Description
a	Left operand
b	Right operand
precision	Bits of precision of both a and b
return	Result of a / b