Function validate_cpu_float

Source/astcenc_entry.cpp:215–227

* @brief Validate CPU floating point meets assumptions made in the codec. * * The codec is written with the assumption that float bit patterns are valid * IEEE754 values that are stored and reloaded with round-to-nearest rounding. * This is always the case in an IEEE-754 compliant system, however not every * system or compilation mode is actually IEEE-754 compliant. This normally * fails if

 * @return Return @c ASTCENC_SUCCESS if validated, an error on failure.
 */
static astcenc_error validate_cpu_float()
{
	volatile float xprec_testval = 2.51f;
	float store = xprec_testval + 12582912.0f;
	float q = store - 12582912.0f;

	if (q != 3.0f)
	{
		return ASTCENC_ERR_BAD_CPU_FLOAT;
	}

	return ASTCENC_SUCCESS;
}

/**
 * @brief Validate config profile.