Russ Cox 92dba0d278 cmd/internal/gc: use hardware instruction for math.Sqrt (amd64/arm) ... I first prototyped this change in Sept 2011, and I discarded it because it made no difference in the obvious benchmark loop. It still makes no difference in the obvious benchmark loop, but in a less obvious one, doing some extra computation around the calls to Sqrt, not making the call does have a significant effect. benchmark old ns/op new ns/op delta BenchmarkSqrt 4.56 4.57 +0.22% BenchmarkSqrtIndirect 4.56 4.56 +0.00% BenchmarkSqrtGo 69.4 69.4 +0.00% BenchmarkSqrtPrime 4417 3647 -17.43% This is a warmup for using hardware expansions for some calls to 1-line assembly routines in the runtime (for example getg). Change-Id: Ie66be23f8c09d0f7dc4ddd7ca8a93cfce28f55a4 Reviewed-on: https://go-review.googlesource.com/8356 Reviewed-by: Rob Pike <r@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>		2015-04-03 16:13:36 +00:00
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cgen.go	cmd/internal/gc: move cgen, regalloc, et al to portable code	2015-03-20 20:03:52 +00:00
galign.go	cmd/6g: fix build for nacl/amd64p32	2015-03-24 23:57:50 +00:00
gg.go	[dev.cc] cmd/6a, cmd/6g etc: replace C implementations with Go implementations	2015-02-23 19:56:40 +00:00
ggen.go	cmd/internal/gc: unembed Node.Func	2015-04-01 18:21:22 +00:00
gsubr.go	cmd/internal/gc: use hardware instruction for math.Sqrt (amd64/arm)	2015-04-03 16:13:36 +00:00
peep.go	cmd/internal/gc: increase registerization limits	2015-03-20 04:56:44 +00:00
prog.go	cmd/internal/gc: use hardware instruction for math.Sqrt (amd64/arm)	2015-04-03 16:13:36 +00:00
reg.go	cmd/6g: make proginfo register bits constants	2015-03-17 01:24:40 +00:00
util.go	[dev.cc] cmd/6a, cmd/6g etc: replace C implementations with Go implementations	2015-02-23 19:56:40 +00:00