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@azonenberg@ioc.exchange2025-07-28 15:11:17
Finally got the x25519 accelerator to build for a Trion T20 (with REGFILE_OUT_REG=1, MULT_AREA_OPT=2).
It's pretty full (12356 / 19728 LE, 112/204 RAM, 34/36 mult), but fits. Fmax in C4 speed grade is 97.8 MHz and one crypto_scalarmult takes 756703 clocks which comes out to 7.73 ms. A scalarbase() is slightly slower but I don't have that number handy right now.
I'm not sure how practically useful this config is, because the FPGA is 62% full logic wise so I can't c…