[PATCH v2 1/8] math: Use cosh from CORE-MATH

[DJ Delorie]

Adhemerval Zanella <adhemerval.zanella@linaro.org> writes:
> +  if (__glibc_unlikely (aix < 0x3fc0000000000000ull))

UINT64_C ?

> +      double e = 0.122e-18 * rh, lb = rh + (rl - e), ub = rh + (rl + e);

0.122e-18 isn't exact, should use p format.  Unless exactness doesn't
matter here; the p form is messy.

> +      rh = fph + fmh;
> +      rl = ((fph - rh) + fmh) + fml + fpl;
> +      double e = 0.38e-18 * rh, lb = rh + (rl - e), ub = rh + (rl + e);

0.38e-18 happens to be exact, but still should use p format, unless as above.