From: Arvind Sankar > Sent: 20 October 2020 21:40 > > Putting the round constants and the message schedule arrays together in > one structure saves one register, which can be a significant benefit on > register-constrained architectures. On x86-32 (tested on Broadwell > Xeon), this gives a 10% performance benefit. I'm actually stunned it makes that much difference. The object code must be truly horrid (before and after). There are probably other strange tweaks that give a similar improvement. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
