check that SSE2 is available before using __vectorcall

include/private/SkTLogic.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  *
  * This header provides some of the helpers (std::integral_constant) and
  * type transformations (std::conditional) which will become available with
  * C++11 in the type_traits header.
@@ skipping 105 matching lines @@
 // The cv and ref-qualified versions are strange types we're currently avoiding, so not supported.
 // On all platforms, variadic functions only exist in the c calling convention.
 template <typename> struct is_function : false_type { };
 #if !defined(SK_BUILD_FOR_WIN)
 template <typename R, typename... Args> struct is_function<R(Args...)> : true_type {};
 #else
 #if defined(_M_IX86)
 template <typename R, typename... Args> struct is_function<R __cdecl (Args...)> : true_type {};
 template <typename R, typename... Args> struct is_function<R __stdcall (Args...)> : true_type {};
 template <typename R, typename... Args> struct is_function<R __fastcall (Args...)> : true_type {};
+#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
 template <typename R, typename... Args> struct is_function<R __vectorcall (Args...)> : true_type {};
+#endif
 #else
 template <typename R, typename... Args> struct is_function<R __cdecl (Args...)> : true_type {};
 template <typename R, typename... Args> struct is_function<R __vectorcall (Args...)> : true_type {};
 #endif
 #endif
 template <typename R, typename... Args> struct is_function<R(Args..., ...)> : true_type {};
 
 template <typename T> struct add_const { using type = const T; };
 template <typename T> using add_const_t = typename add_const<T>::type;
 
@@ skipping 80 matching lines @@
 template <typename D, typename S> using same_volatile_t = typename same_volatile<D, S>::type;
 template <typename D, typename S> using same_cv = copy_cv<skstd::remove_cv_t<D>, S>;
 template <typename D, typename S> using same_cv_t = typename same_cv<D, S>::type;
 
 }  // namespace sknonstd
 
 // Just a pithier wrapper for enable_if_t.
 #define SK_WHEN(condition, T) skstd::enable_if_t<!!(condition), T>
 
 #endif