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cpu: add DIT option and hwcap DIT support

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Follow-up to https://go.dev/cl/597377, add a option for DIT so it can be
set via GODEBUG, and add hwcap support for Linux.

Change-Id: Ib094b520edea9c099d37f121b09d02b31644a433
Reviewed-on: https://go-review.googlesource.com/c/sys/+/598719
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Roland Shoemaker
2024-07-17 01:04:09 +00:00
parent dce4e64e66
commit 0c18c88c71
2 changed files with 4 additions and 0 deletions
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cpu/cpu_arm64.go
+1
View File
@@ -38,6 +38,7 @@ func initOptions() {
{Name: "dcpop", Feature: &ARM64.HasDCPOP}, {Name: "dcpop", Feature: &ARM64.HasDCPOP},
{Name: "asimddp", Feature: &ARM64.HasASIMDDP}, {Name: "asimddp", Feature: &ARM64.HasASIMDDP},
{Name: "asimdfhm", Feature: &ARM64.HasASIMDFHM}, {Name: "asimdfhm", Feature: &ARM64.HasASIMDFHM},
{Name: "dit", Feature: &ARM64.HasDIT},
} }
} }
cpu/cpu_linux_arm64.go
+3
View File
@@ -35,6 +35,7 @@ const (
hwcap_SHA512 = 1 << 21 hwcap_SHA512 = 1 << 21
hwcap_SVE = 1 << 22 hwcap_SVE = 1 << 22
hwcap_ASIMDFHM = 1 << 23 hwcap_ASIMDFHM = 1 << 23
hwcap_DIT = 1 << 24
hwcap2_SVE2 = 1 << 1 hwcap2_SVE2 = 1 << 1
) )
@@ -106,6 +107,8 @@ func doinit() {
ARM64.HasSHA512 = isSet(hwCap, hwcap_SHA512) ARM64.HasSHA512 = isSet(hwCap, hwcap_SHA512)
ARM64.HasSVE = isSet(hwCap, hwcap_SVE) ARM64.HasSVE = isSet(hwCap, hwcap_SVE)
ARM64.HasASIMDFHM = isSet(hwCap, hwcap_ASIMDFHM) ARM64.HasASIMDFHM = isSet(hwCap, hwcap_ASIMDFHM)
ARM64.HasDIT = isSet(hwCap, hwcap_DIT)
// HWCAP2 feature bits // HWCAP2 feature bits
ARM64.HasSVE2 = isSet(hwCap2, hwcap2_SVE2) ARM64.HasSVE2 = isSet(hwCap2, hwcap2_SVE2)