Detailed Description

Types for storing fractional data.

sfract7 should be interpreted as signed 128ths.
fract8 should be interpreted as unsigned 256ths.
sfract15 should be interpreted as signed 32768ths.
fract16 should be interpreted as unsigned 65536ths.

Example: if a fract8 has the value "64", that should be interpreted as 64/256ths, or one-quarter.

accumXY types should be interpreted as X bits of integer, and Y bits of fraction.
E.g., accum88 has 8 bits of int, 8 bits of fraction

Classes
union	IEEE754binary32_t
	typedef for IEEE754 "binary32" float type internals More...

class	q< T, F, I >
	Template class for representing fractional ints. More...

Typedefs
typedef uint8_t	fract8
	ANSI: unsigned short _Fract.

typedef int8_t	sfract7
	ANSI: signed short _Fract.

typedef uint16_t	fract16
	ANSI: unsigned _Fract.

typedef int16_t	sfract15
	ANSI: signed _Fract.

typedef uint16_t	accum88
	ANSI: unsigned short _Accum. 8 bits int, 8 bits fraction.

typedef int16_t	saccum78
	ANSI: signed short _Accum. 7 bits int, 8 bits fraction.

typedef uint32_t	accum1616
	ANSI: signed _Accum. 16 bits int, 16 bits fraction.

typedef int32_t	saccum1516
	ANSI: signed _Accum. 15 bits int, 16 bits fraction.

typedef uint16_t	accum124
	no direct ANSI counterpart. 12 bits int, 4 bits fraction

typedef int32_t	saccum114
	no direct ANSI counterpart. 1 bit int, 14 bits fraction

typedef q< uint8_t, 4, 4 >	q44
	A 4.4 integer (4 bits integer, 4 bits fraction)

typedef q< uint8_t, 6, 2 >	q62
	A 6.2 integer (6 bits integer, 2 bits fraction)

typedef q< uint16_t, 8, 8 >	q88
	A 8.8 integer (8 bits integer, 8 bits fraction)

typedef q< uint16_t, 12, 4 >	q124
	A 12.4 integer (12 bits integer, 4 bits fraction)

Typedef Documentation

◆ accum124

typedef uint16_t accum124

no direct ANSI counterpart. 12 bits int, 4 bits fraction

Definition at line 424 of file lib8tion.h.

◆ accum1616

typedef uint32_t accum1616

ANSI: signed _Accum. 16 bits int, 16 bits fraction.

Definition at line 422 of file lib8tion.h.

◆ accum88

typedef uint16_t accum88

ANSI: unsigned short _Accum. 8 bits int, 8 bits fraction.

Definition at line 420 of file lib8tion.h.

◆ fract16

typedef uint16_t fract16

ANSI: unsigned _Fract.

Range is 0 to 0.99998474121 in steps of 0.00001525878.
Should be interpreted as unsigned 65536ths.

Definition at line 412 of file lib8tion.h.

◆ fract8

typedef uint8_t fract8

ANSI: unsigned short _Fract.

Range is 0 to 0.99609375 in steps of 0.00390625.
Should be interpreted as unsigned 256ths.

Definition at line 402 of file lib8tion.h.

◆ q124

typedef q<uint16_t, 12,4> q124

A 12.4 integer (12 bits integer, 4 bits fraction)

Definition at line 937 of file lib8tion.h.

◆ q44

typedef q<uint8_t, 4,4> q44

A 4.4 integer (4 bits integer, 4 bits fraction)

Definition at line 931 of file lib8tion.h.

◆ q62

typedef q<uint8_t, 6,2> q62

A 6.2 integer (6 bits integer, 2 bits fraction)

Definition at line 933 of file lib8tion.h.

◆ q88

typedef q<uint16_t, 8,8> q88

A 8.8 integer (8 bits integer, 8 bits fraction)

Definition at line 935 of file lib8tion.h.

◆ saccum114

typedef int32_t saccum114

no direct ANSI counterpart. 1 bit int, 14 bits fraction

Definition at line 425 of file lib8tion.h.

◆ saccum1516

typedef int32_t saccum1516

ANSI: signed _Accum. 15 bits int, 16 bits fraction.

Definition at line 423 of file lib8tion.h.

◆ saccum78

typedef int16_t saccum78

ANSI: signed short _Accum. 7 bits int, 8 bits fraction.

Definition at line 421 of file lib8tion.h.

◆ sfract15

typedef int16_t sfract15

ANSI: signed _Fract.

Range is -0.99996948242 to 0.99996948242 in steps of 0.00003051757.
Should be interpreted as signed 32768ths.

Definition at line 417 of file lib8tion.h.

◆ sfract7

typedef int8_t sfract7

ANSI: signed short _Fract.

Range is -0.9921875 to 0.9921875 in steps of 0.0078125.
Should be interpreted as signed 128ths.

Definition at line 407 of file lib8tion.h.