double-double/src/double-double/unary/dd-mult-by-4.ts

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

/**
 * Returns the result of multiplying the given double-double by 4.
 * * The result is exact
 * @param f a double-double precision floating point number
 */
function ddMultBy4(f: number[]) {
    return [4*f[0],4*f[1]];
}


export { ddMultBy4 }