Richard Henderson <r...@twiddle.net> writes: arm.com has them, free registration required. Found it. Had to click through some zany revision numbers, making me thing these were revision guides, not proper documentation.
Table B.5. Multiplication instruction cycle timings Instruction Cycles Result latency UMAAL 3 4 for the first written register 5 for the second written register This seem unrelated to reality on my system. But the documentaton is so sloppy that many interpretations are possible. Do you have any guess of what the first number, "cycles" might mean? Perhaps that's to be taken as 1/throughout? On my system, umaal has a latency if 3, whatever dependencies I create. (There are 4 input regs and 2 output, so there are quite a few possible dependency combinations; I only tried a subset.) Either the docs are plain wrong, or there are several variants of A9. -- Torbjörn _______________________________________________ gmp-devel mailing list gmp-devel@gmplib.org http://gmplib.org/mailman/listinfo/gmp-devel
