Introduce new Arm64 arch variant with dot product features
In order to rely on `-march`/`-mcpu` compiler flags for feature
detection, we introduce a new arch variant based on armv8.2 with the
addition of dot product features.
Test: test-art-target on Pixel 4.
Change-Id: I4d97db6129e2cd718a2b21008d36ec767739f925
diff --git a/cc/config/arm64_device.go b/cc/config/arm64_device.go
index 62d8cc8..e6024aa 100644
--- a/cc/config/arm64_device.go
+++ b/cc/config/arm64_device.go
@@ -34,6 +34,9 @@
"armv8-2a": []string{
"-march=armv8.2-a",
},
+ "armv8-2a-dotprod": []string{
+ "-march=armv8.2-a+dotprod",
+ },
}
arm64Ldflags = []string{
@@ -100,6 +103,7 @@
pctx.StaticVariable("Arm64ClangArmv8ACflags", strings.Join(arm64ArchVariantCflags["armv8-a"], " "))
pctx.StaticVariable("Arm64ClangArmv82ACflags", strings.Join(arm64ArchVariantCflags["armv8-2a"], " "))
+ pctx.StaticVariable("Arm64ClangArmv82ADotprodCflags", strings.Join(arm64ArchVariantCflags["armv8-2a-dotprod"], " "))
pctx.StaticVariable("Arm64ClangCortexA53Cflags",
strings.Join(arm64ClangCpuVariantCflags["cortex-a53"], " "))
@@ -121,6 +125,7 @@
arm64ClangArchVariantCflagsVar = map[string]string{
"armv8-a": "${config.Arm64ClangArmv8ACflags}",
"armv8-2a": "${config.Arm64ClangArmv82ACflags}",
+ "armv8-2a-dotprod": "${config.Arm64ClangArmv82ADotprodCflags}",
}
arm64ClangCpuVariantCflagsVar = map[string]string{
@@ -198,6 +203,7 @@
switch arch.ArchVariant {
case "armv8-a":
case "armv8-2a":
+ case "armv8-2a-dotprod":
// Nothing extra for armv8-a/armv8-2a
default:
panic(fmt.Sprintf("Unknown ARM architecture version: %q", arch.ArchVariant))