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cpu: add support for sve2 detection

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Fixes golang/go#66952

Change-Id: Idaf2ce3b09baf33cf29079677a83a51ea9c4b255
GitHub-Last-Rev: eac00886d1370e7a0fa7a6cb18299c5e7b6e21e4
GitHub-Pull-Request: golang/sys#193
Reviewed-on: https://go-review.googlesource.com/c/sys/+/580655
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
This commit is contained in:
Michal Hruby
2024-05-03 16:45:19 +00:00
committed by Gopher Robot
parent 9a28524796
commit 7758090324
5 changed files with 25 additions and 0 deletions
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cpu/cpu_arm64.go
+10
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@@ -28,6 +28,7 @@ func initOptions() {
{Name: "sm3", Feature: &ARM64.HasSM3},
{Name: "sm4", Feature: &ARM64.HasSM4},
{Name: "sve", Feature: &ARM64.HasSVE},
{Name: "sve2", Feature: &ARM64.HasSVE2},
{Name: "crc32", Feature: &ARM64.HasCRC32},
{Name: "atomics", Feature: &ARM64.HasATOMICS},
{Name: "asimdhp", Feature: &ARM64.HasASIMDHP},
@@ -164,6 +165,15 @@ func parseARM64SystemRegisters(isar0, isar1, pfr0 uint64) {
switch extractBits(pfr0, 32, 35) {
case 1:
ARM64.HasSVE = true
parseARM64SVERegister(getzfr0())
}
}
func parseARM64SVERegister(zfr0 uint64) {
switch extractBits(zfr0, 0, 3) {
case 1:
ARM64.HasSVE2 = true
}
}