abs8()

LIB8STATIC_ALWAYS_INLINE int8_t abs8

(

int8_t

i

)

Take the absolute value of a signed 8-bit uint8_t.

Definition at line 516 of file math8.h.

                                               {
#if ABS8_C == 1
    if (i < 0)
        i = -i;
    return i;
#elif ABS8_AVRASM == 1
    asm volatile(
        /* First, check the high bit, and prepare to skip if it's clear */
        "sbrc %0, 7 \n"
 
        /* Negate the value */
        "neg %0     \n"
 
        : "+r"(i)
        : "r"(i));
    return i;
#else
#error "No implementation for abs8 available."
#endif
}

References LIB8STATIC_ALWAYS_INLINE.

Referenced by getFirePaletteIndex(), getPaletteIndex(), and getPaletteIndex().

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