avg7()

LIB8STATIC_ALWAYS_INLINE int8_t avg7	(	int8_t	i,
		int8_t	j )

Calculate an integer average of two signed 7-bit integers (int8_t).

If the first argument is even, result is rounded down. If the first argument is odd, result is rounded up.

Parameters

i	first value to average
j	second value to average

Returns

mean average of i and j, rounded

Definition at line 306 of file math8.h.

                                                         {
#if AVG7_C == 1
    return (i >> 1) + (j >> 1) + (i & 0x1);
#elif AVG7_AVRASM == 1
    asm volatile("asr %1        \n\t"
                 "asr %0        \n\t"
                 "adc %0, %1    \n\t"
                 : "+r"(i)
                 : "r"(j));
    return i;
#else
#error "No implementation for avg7 available."
#endif
}

References LIB8STATIC_ALWAYS_INLINE.

Referenced by grad8(), grad8(), and grad8().

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