rt_util_float16_to_float()

float rt_util_float16_to_float

(

uint16_t

value

)

Definition at line 134 of file rt_util.c.

{
        union {
                uint32_t u;
                float f;
        } v;
 
        uint32_t sign = (uint32_t)(value & 0x8000U) << 16;
        uint32_t exponent = (value >> 10) & 0x1fU;
        uint32_t mantissa = value & 0x3ffU;
 
        if (exponent == 0)
        {
                if (mantissa == 0)
                {
                        v.u = sign;
                }
                else
                {
                        exponent = 1;
                        while ((mantissa & 0x400U) == 0)
                        {
                                mantissa <<= 1;
                                exponent--;
                        }
                        mantissa &= 0x3ffU;
                        v.u = sign | ((exponent + 127 - 15) << 23) | (mantissa << 13);
                }
        }
        else if (exponent == 31)
        {
                v.u = sign | 0x7f800000U | (mantissa << 13);
        }
        else
        {
                v.u = sign | ((exponent + 127 - 15) << 23) | (mantissa << 13);
        }
 
        return v.f;
}

Referenced by rt_band_from_wkb(), rt_band_get_pixel(), rt_band_init_value(), rt_band_set_nodata(), rt_band_set_pixel(), and rt_raster_deserialize().

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