On Fri, 11 Feb 2022 18:24:49 GMT, Andrew Haley <a...@openjdk.org> wrote:
> Just multiply by 0.75. > > On a modern design, floating-point multiply is 4 clocks latency, 4 ops/clock > throughput. FP max is 2 clocks latency, conversions int-float and vice versa > 3 clocks latency, 4 ops/clock throughput. Long division is 7-9 clocks, > 2ops/clock throughput. Shift and add 2 clocks, 2/3 ops/clock througput. > Compare is 1 clock, 3 ops/clock throughput, conditional move is 1 clock, 3 > ops/clock throughput. > > Seems like it's a wash. @theRealAph no multiply but divide. besides, did you count the cost for Math.ceil? it is the heaviest part. ------------- PR: https://git.openjdk.java.net/jdk/pull/7431
