On Fri, Dec 9, 2016 at 2:09 AM, Sebastian Huber <sebastian.hu...@embedded-brains.de> wrote: > On 08/12/16 17:37, Ian Lance Taylor wrote: >> >> +// For gccgo, use go:linkname to rename compiler-called functions to >> +// themselves, so that the compiler will export them. >> +// >> +//go:linkname memhash runtime.memhash >> + >> +const ( >> + // Constants for multiplication: four random odd 64-bit numbers. >> + m1 = 16877499708836156737 >> + m2 = 2820277070424839065 >> + m3 = 9497967016996688599 >> + m4 = 15839092249703872147 >> +) > > > Out of curiosity, how did you generate these numbers?
I just copied them from the master gc library (in this case from https://golang.org/src/runtime/hash64.go). I asked Keith Randall, who wrote the original version, and he said he simply generated them randomly. He said "I believe I used python's random.randrange(2**64)|1." Ian
