internal/buildcfg: enable register ABI for PPC64

This enables the new register ABI for all PPC64 targets by default including linux/ppc64, linux/ppc64le, and aix/ppc64. Improvements with the new register ABI on a power9: name old time/op (ns/op) new time/op (ns/op) delta BinaryTree17 3882070000 3274900000 -15.64% Fannkuch11 3787620000 3614740000 -4.56% FmtFprintfEmpty 58.705 51.1875 -12.81% FmtFprintfString 101.675 94.4725 -7.08% FmtFprintfInt 112.725 104.075 -7.67% FmtFprintfIntInt 166.475 158.05 -5.06% FmtFprintfPrefixedInt 183.7 178.975 -2.57% FmtFprintfFloat 246.55 258.8 +4.97% FmtManyArgs 648.325 665.875 +2.71% GobDecode 8004660 6802210 -15.02% GobEncode 7289780 5675710 -22.14% Gzip 326931000 323586000 -1.02% Gunzip 47544700 37808000 -20.48% HTTPClientServer 46927.2 42357.8 -9.74% JSONEncode 12098300 9621450 -20.47% JSONDecode 62305300 55410200 -11.07% Mandelbrot200 5841540 5934590 +1.59% GoParse 5594880 4003360 -28.45% RegexpMatchEasy0_32 96.185 89.6325 -6.81% RegexpMatchEasy0_1K 255.775 210.45 -17.72% RegexpMatchEasy1_32 102.95 93.8825 -8.81% RegexpMatchEasy1_1K 511.65 385.075 -24.74% RegexpMatchMedium_32 1414.75 1236.75 -12.58% RegexpMatchMedium_1K 42114.5 37022.5 -12.09% RegexpMatchHard_32 2110.5 1901.5 -9.90% RegexpMatchHard_1K 63559.5 59494 -6.40% Revcomp 532981000 480640000 -9.82% Template 81903600 65743300 -19.73% TimeParse 310.75 276.525 -11.01% TimeFormat 483.4 355.475 -26.46% Change-Id: Ib7c5dfe8ddc2f17050943912048f55667dabde39 Reviewed-on: https://go-review.googlesource.com/c/go/+/353969 Trust: Lynn Boger <[email protected]> Reviewed-by: Cherry Mui <[email protected]>
cloudflare · Oct 5, 2021 · ae83301 · ae83301
1 parent 7e69c5d
commit ae83301
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/src/internal/buildcfg/exp.go b/src/internal/buildcfg/exp.go
@@ -46,7 +46,11 @@ var FramePointerEnabled = GOARCH == "amd64" || GOARCH == "arm64"
 //
 // TODO(mdempsky): Move to internal/goexperiment.
 func ParseGOEXPERIMENT(goos, goarch, goexp string) (flags, baseline goexperiment.Flags, err error) {
- regabiSupported := goarch == "amd64" || goarch == "arm64"
+ regabiSupported := false
+ switch goarch {
+ case "amd64", "arm64", "ppc64le", "ppc64":
+ regabiSupported = true
+ }
 
  baseline = goexperiment.Flags{
  RegabiWrappers: regabiSupported,
@@ -112,7 +116,7 @@ func ParseGOEXPERIMENT(goos, goarch, goexp string) (flags, baseline goexperiment
  flags.RegabiArgs = true
  }
  // regabi is only supported on amd64, arm64, ppc64 and ppc64le.
- if goarch != "amd64" && goarch != "arm64" && goarch != "ppc64le" && goarch != "ppc64" {
+ if !regabiSupported {
  flags.RegabiReflect = false
  flags.RegabiArgs = false
  }