Merge "Add stoney ridge x86 variant"

am: cd2e52870a

Change-Id: I8c08245cc45cc4ed91a016058fb043a299fa95cf

cc/config/x86_64_device.go

@@ -57,6 +57,9 @@ var (
 		"skylake": []string{
 			"-march=skylake",
 		},
+		"stoneyridge": []string{
+			"-march=bdver4",
+		},
 	}
 
 	x86_64ArchFeatureCflags = map[string][]string{

cc/config/x86_device.go

@@ -75,6 +75,10 @@ var (
 			"-march=skylake",
 			"-mfpmath=sse",
 		},
+		"stoneyridge": []string{
+			"-march=bdver4",
+			"-mfpmath=sse",
+		},
 	}
 
 	x86ArchFeatureCflags = map[string][]string{
@@ -83,6 +87,7 @@ var (
 		"sse4_1": []string{"-msse4.1"},
 		"sse4_2": []string{"-msse4.2"},
 		"avx":    []string{"-mavx"},
+		"avx2":   []string{"-mavx2"},
 		"aes_ni": []string{"-maes"},
 	}
 )