[dev.simd] simd, internal/cpu: support more AVX CPU Feature checks

This CL adds more checks, it also changes HasAVX512GFNI to be exactly
checking GFNI instead of being a virtual feature.

This CL copies its logic from x/sys/arch.

Change-Id: I4612b0409b8a3518928300562ae08bcf123d53a7
Reviewed-on: https://go-review.googlesource.com/c/go/+/688276
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>

1 files changed, 43 insertions, 3 deletions

diff --git a/src/simd/cpu.go b/src/simd/cpu.go
index 5ff47b8873..7bc5116525 100644
--- a/src/simd/cpu.go
+++ b/src/simd/cpu.go
@@ -11,12 +11,52 @@ package simd
 
 import "internal/cpu"
 
-// HasAVX512GFNI checks AVX512 CPU feature F+CD+BW+DQ+VL+GFNI.
-func HasAVX512GFNI() bool {
-	return cpu.X86.HasAVX512GFNI
+// HasAVX checks AVX CPU feature.
+func HasAVX() bool {
+	return cpu.X86.HasAVX
+}
+
+// HasAVXVNNI checks AVX CPU feature VNNI.
+func HasAVXVNNI() bool {
+	return cpu.X86.HasAVXVNNI
+}
+
+// HasAVX2 checks AVX2 CPU feature.
+func HasAVX2() bool {
+	return cpu.X86.HasAVX2
 }
 
 // HasAVX512 checks AVX512 CPU feature F+CD+BW+DQ+VL.
 func HasAVX512() bool {
 	return cpu.X86.HasAVX512
 }
+
+// HasAVX512GFNI checks AVX512 CPU feature GFNI.
+func HasAVX512GFNI() bool {
+	return cpu.X86.HasAVX512GFNI
+}
+
+// HasAVX512VBMI checks AVX512 CPU feature VBMI
+func HasAVX512VBMI() bool {
+	return cpu.X86.HasAVX512VBMI
+}
+
+// HasAVX512VBMI2 checks AVX512 CPU feature VBMI2
+func HasAVX512VBMI2() bool {
+	return cpu.X86.HasAVX512VBMI2
+}
+
+// HasAVX512VNNI checks AVX512 CPU feature VNNI
+func HasAVX512VNNI() bool {
+	return cpu.X86.HasAVX512VNNI
+}
+
+// HasAVX512VPOPCNTDQ checks AVX512 CPU feature VPOPCNTDQ
+func HasAVX512VPOPCNTDQ() bool {
+	return cpu.X86.HasAVX512VPOPCNTDQ
+}
+
+// HasAVX512BITALG checks AVX512 CPU feature BITALG
+func HasAVX512BITALG() bool {
+	return cpu.X86.HasAVX512BITALG
+}