double-double/src/double-double/unary/dd-sign.ts

Pure double-double precision functions *with strict error bounds*.

/**
 * Returns the sign of the given double-double-precision floating point number.
 * * a positive or negative double or zero is returned - not necessarily +1, 0
 * or -1
 * * prefer inlining this - it is really only here for reference
 */
function ddSign(f: number[]) {
    return f[1];
}


export { ddSign }