SkNx: kth<...>() -> [...]

src/core/SkColor.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColor.h"
 #include "SkColorPriv.h"
 #include "SkFixed.h"
@@ skipping 150 matching lines @@
 }
 
 SkColor4f SkColor4f::Pin(float a, float r, float g, float b) {
     SkColor4f c4;
     Sk4f::Min(Sk4f::Max(Sk4f(a, r, g, b), Sk4f(0)), Sk4f(1)).store(c4.vec());
     return c4;
 }
 
 SkPM4f SkColor4f::premul() const {
     auto src = Sk4f::Load(this->pin().vec());
-    float srcAlpha = src.kth<0>();  // need the pinned version of our alpha
+    float srcAlpha = src[0];  // need the pinned version of our alpha
     src = src * Sk4f(1, srcAlpha, srcAlpha, srcAlpha);
 
 #ifdef SK_PMCOLOR_IS_BGRA
     // ARGB -> BGRA
     Sk4f dst = SkNx_shuffle<3,2,1,0>(src);
 #else
     // ARGB -> RGBA
     Sk4f dst = SkNx_shuffle<1,2,3,0>(src);
 #endif
 
     SkPM4f pm4;
     dst.store(&pm4);
     return pm4;
 }