math8.h File Reference

Detailed Description

Fast, efficient 8-bit math functions specifically designed for high-performance LED programming.

Definition in file math8.h.

#include "scale8.h"

Go to the source code of this file.

Functions
LIB8STATIC_ALWAYS_INLINE uint8_t	qadd8 (uint8_t i, uint8_t j)
	Add one byte to another, saturating at 0xFF.
LIB8STATIC_ALWAYS_INLINE int8_t	qadd7 (int8_t i, int8_t j)
	Add one byte to another, saturating at 0x7F and -0x80.
LIB8STATIC_ALWAYS_INLINE uint8_t	qsub8 (uint8_t i, uint8_t j)
	Subtract one byte from another, saturating at 0x00.
LIB8STATIC_ALWAYS_INLINE uint8_t	add8 (uint8_t i, uint8_t j)
	Add one byte to another, with 8-bit result.
LIB8STATIC_ALWAYS_INLINE uint16_t	add8to16 (uint8_t i, uint16_t j)
	Add one byte to two bytes, with 16-bit result.
LIB8STATIC_ALWAYS_INLINE uint8_t	sub8 (uint8_t i, uint8_t j)
	Subtract one byte from another, 8-bit result.
LIB8STATIC_ALWAYS_INLINE uint8_t	avg8 (uint8_t i, uint8_t j)
	Calculate an integer average of two unsigned 8-bit integer values (uint8_t), rounded down.
LIB8STATIC_ALWAYS_INLINE uint16_t	avg16 (uint16_t i, uint16_t j)
	Calculate an integer average of two unsigned 16-bit integer values (uint16_t), rounded down.
LIB8STATIC_ALWAYS_INLINE uint8_t	avg8r (uint8_t i, uint8_t j)
	Calculate an integer average of two unsigned 8-bit integer values (uint8_t), rounded up.
LIB8STATIC_ALWAYS_INLINE uint16_t	avg16r (uint16_t i, uint16_t j)
	Calculate an integer average of two unsigned 16-bit integer values (uint16_t), rounded up.
LIB8STATIC_ALWAYS_INLINE int8_t	avg7 (int8_t i, int8_t j)
	Calculate an integer average of two signed 7-bit integers (int8_t).
LIB8STATIC_ALWAYS_INLINE int16_t	avg15 (int16_t i, int16_t j)
	Calculate an integer average of two signed 15-bit integers (int16_t).
LIB8STATIC_ALWAYS_INLINE uint8_t	mod8 (uint8_t a, uint8_t m)
	Calculate the remainder of one unsigned 8-bit value divided by anoter, aka A % M.
LIB8STATIC uint8_t	addmod8 (uint8_t a, uint8_t b, uint8_t m)
	Add two numbers, and calculate the modulo of the sum and a third number, M.
LIB8STATIC uint8_t	submod8 (uint8_t a, uint8_t b, uint8_t m)
	Subtract two numbers, and calculate the modulo of the difference and a third number, M.
LIB8STATIC_ALWAYS_INLINE uint8_t	mul8 (uint8_t i, uint8_t j)
	8x8 bit multiplication, with 8-bit result.
LIB8STATIC_ALWAYS_INLINE uint8_t	qmul8 (uint8_t i, uint8_t j)
	8x8 bit multiplication with 8-bit result, saturating at 0xFF.
LIB8STATIC_ALWAYS_INLINE int8_t	abs8 (int8_t i)
	Take the absolute value of a signed 8-bit uint8_t.
LIB8STATIC uint8_t	sqrt16 (uint16_t x)
	Square root for 16-bit integers.
LIB8STATIC uint8_t	blend8 (uint8_t a, uint8_t b, uint8_t amountOfB)
	Blend a variable proportion (0-255) of one byte to another.