Add batch support, improve random generation, improve multiprecision trig.#13

Open

paulcaprioli wants to merge 3 commits intoFFTW:masterfrom paulcaprioli:master

+374-223

Commits on May 26, 2023

Improved accuracy of multiprecision trig.
paulcaprioli
committed

Commits on Jun 16, 2023

Replace system drand48() with portable C code RNG.
paulcaprioli
committed

Commits on Jun 24, 2023

Add support to benchmark a batch of FFTs.
paulcaprioli
committed