1.000001: how far outside [-1, 1] an asin or acos argument could be before older code reported an error. asin and acos here return NaN for any argument beyond +/-1 and do not use it.
ASIN_AND_ACOS_ERROR_REPORTING_LIMIT :: 1.0000011.000001: how far outside [-1, 1] an asin or acos argument could be before older code reported an error. asin and acos here return NaN for any argument beyond +/-1 and do not use it.
ASIN_AND_ACOS_ERROR_REPORTING_LIMIT :: 1.000001