diff --git a/blake2b/blake2bAVX2_amd64.go b/blake2b/blake2bAVX2_amd64.go
index 8c41cf6..a1e08d7 100644
--- a/blake2b/blake2bAVX2_amd64.go
+++ b/blake2b/blake2bAVX2_amd64.go
@@ -6,21 +6,23 @@
 
 package blake2b
 
+import _ "unsafe"
+
+//go:linkname x86_HasAVX internal/cpu.X86.HasAVX
+var x86_HasAVX bool
+
+//go:linkname x86_HasAVX2 internal/cpu.X86.HasAVX2
+var x86_HasAVX2 bool
+
+//go:linkname x86_HasAVX internal/cpu.X86.HasSSE4
+var x86_HasSSE4 bool
+
 func init() {
-	useAVX2 = supportsAVX2()
-	useAVX = supportsAVX()
-	useSSE4 = supportsSSE4()
+	useAVX2 = x86_HasAVX2
+	useAVX = x86_HasAVX
+	useSSE4 = x86_HasSSE4
 }
 
-//go:noescape
-func supportsSSE4() bool
-
-//go:noescape
-func supportsAVX() bool
-
-//go:noescape
-func supportsAVX2() bool
-
 //go:noescape
 func hashBlocksAVX2(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte)
 
diff --git a/blake2b/blake2bAVX2_amd64.s b/blake2b/blake2bAVX2_amd64.s
index 784bce6..5593b1b 100644
--- a/blake2b/blake2bAVX2_amd64.s
+++ b/blake2b/blake2bAVX2_amd64.s
@@ -748,15 +748,3 @@ noinc:
 
 	MOVQ BP, SP
 	RET
-
-// func supportsAVX2() bool
-TEXT ·supportsAVX2(SB), 4, $0-1
-	MOVQ runtime·support_avx2(SB), AX
-	MOVB AX, ret+0(FP)
-	RET
-
-// func supportsAVX() bool
-TEXT ·supportsAVX(SB), 4, $0-1
-	MOVQ runtime·support_avx(SB), AX
-	MOVB AX, ret+0(FP)
-	RET