cpu: better defaults on darwin ARM64

mirror of https://github.com/rwinkhart/sys.git synced 2026-09-03 15:47:35 -04:00

This is motivated by
https://github.com/wazero/wazero/pull/2473
which needs to special case darwin for testing the availability of
HasATOMICS, although all M-series CPUs support it.

We could do sysctlbyname, like syscall_darwin_x86_gc.go, if that's
preferred:
https://developer.apple.com/documentation/kernel/1387446-sysctlbyname/determining_instruction_set_characteristics

Change-Id: I0f5ea55ef5cda4956db44b2d40f2f10044fa3321
GitHub-Last-Rev: d5d0f1e989579de2a25c97c00c7e9db5d4b0cb29
GitHub-Pull-Request: golang/sys#267
Reviewed-on: https://go-review.googlesource.com/c/sys/+/743320
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>

This commit is contained in:

Nuno Cruces

2026-02-12 09:29:35 -08:00

committed by

Gopher Robot

parent 48062e9b9a

commit 3687fbd716

4 changed files with 34 additions and 8 deletions

									
										cpu/cpu_gccgo_arm64.go
									
		+1
		
												View File
												
				@@ -9,3 +9,4 @@ package cpu

				func getisar0() uint64 { return 0 }

				func getisar1() uint64 { return 0 }

				func getpfr0() uint64  { return 0 }

				func getzfr0() uint64  { return 0 }