- fp2exp x2 x1procedure
- fp2log x2 x1procedure
- fp2expm1 x2 x1procedure
- fp2log1p x2 x1procedure
Like fpexp, fplog, fpexpm1 and fplog1p, but for double-double flonums.
For fp2exp and fp2expm1, error is less than 3 ulps. (See flpulp.) For fp2log and {{}fp2log1p}}, error is less than 2 ulps.