feat(arch): add the FP16 complex multiply and minimum-maximum to the extension layer

Assisted-by: GLM 5.3 Flash

asm/extension_amd64_test.go

@@ -76,6 +76,11 @@ func TestAmd64ExtensionRegistry(t *testing.T) {
 		{"VFMSUB132SH", 1},
 		{"VFMSUB213SH", 1},
 		{"VFMSUB231SH", 1},
+		{"VFMULCPH", 3},
+		{"VFCMULCPH", 3},
+		{"VFMULCSH", 1},
+		{"VFCMULCSH", 1},
+		{"VMINMAXPH", 3},
 	} {
 		cands, ok := LookupExtension(arch.AMD64, tt.mnem)
 		if !ok {
@@ -89,8 +94,8 @@ func TestAmd64ExtensionRegistry(t *testing.T) {
 			t.Errorf("the %s lookup is not case-insensitive", tt.mnem)
 		}
 	}
-	if got := arch.Extensions(arch.AMD64); len(got) != 163 {
-		t.Errorf("the amd64 layer registers %d instructions, want 163", len(got))
+	if got := arch.Extensions(arch.AMD64); len(got) != 174 {
+		t.Errorf("the amd64 layer registers %d instructions, want 174", len(got))
 	}
 	if _, ok := LookupExtension(arch.AMD64, "NOSUCHINSTR"); ok {
 		t.Error("a non-extended mnemonic resolved")