On October 3, 2023 03:32:34 +0200, "J. Gareth Moreton via fpc-devel" <fpc-devel@lists.freepascal.org> wrote:
Hii Kit, >This is mainly to Florian, but also to anyone else who can answer the question >- at which point did a complex LEA instruction (using all three input operands >and some other specific circumstances) get slow? Preliminary research >suggests the 486 was when it gained extra latency, and then Sandy Bridge when >it got particularly bad. Icy Lake seems to be the architecture where faster >LEA instructions are reintroduced, but I'm not sure about AMD processors. I cannot answer your question, but if you prepare a test program, I can run it on an Intel 486 DX2 100 Mhz and AMD Athlon 1 GHz machines if it helps you in any way (at least I hope the 486 DX2 machine should be still able to start ;-) ). Tomas _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel
