lv_math.h

#define LV_TRIGO_SIN_MAX 32768

#define LV_TRIGO_SHIFT 15

#define LV_BEZIER_VAL_SHIFT 10

#define LV_BEZIER_VAL_MAX (1L << LV_BEZIER_VAL_SHIFT)

#define LV_BEZIER_VAL_FLOAT(f) \
    ((int32_t)((f) * LV_BEZIER_VAL_MAX))

#define LV_ALIGN_UP(x, align) \
    (((x) + ((align) - 1)) & ~((align) - 1))

#define LV_ROUND_UP(x, round) \
    ((((x) + ((round) - 1)) / (round)) * (round))

#define LV_MIN(a, b) \
    ((a) < (b) ? (a) : (b))

#define LV_MIN3(a, b, c) \
    (LV_MIN(LV_MIN(a,b), c))

#define LV_MIN4(a, b, c, d) \
    (LV_MIN(LV_MIN(a,b), LV_MIN(c,d)))

#define LV_MAX(a, b) \
    ((a) > (b) ? (a) : (b))

#define LV_MAX3(a, b, c) \
    (LV_MAX(LV_MAX(a,b), c))

#define LV_MAX4(a, b, c, d) \
    (LV_MAX(LV_MAX(a,b), LV_MAX(c,d)))

#define LV_CLAMP(min, val, max) \
    (LV_MAX(min, (LV_MIN(val, max))))

#define LV_ABS(x) \
    ((x) > 0 ? (x) : (-(x)))

#define LV_UDIV255(x) \
    (((x) * 0x8081U) >> 0x17)

#define LV_IS_SIGNED(t) \
    (((t)(-1)) < ((t)0))

#define LV_UMAX_OF(t) \
    (((0x1ULL << ((sizeof(t) * 8ULL) - 1ULL)) - 1ULL) | (0xFULL << ((sizeof(t) * 8ULL) - 4ULL)))

#define LV_SMAX_OF(t) \
    (((0x1ULL << ((sizeof(t) * 8ULL) - 1ULL)) - 1ULL) | (0x7ULL << ((sizeof(t) * 8ULL) - 4ULL)))

#define LV_MAX_OF(t) \
    ((unsigned long)(LV_IS_SIGNED(t) ? LV_SMAX_OF(t) : LV_UMAX_OF(t)))