SkNx: add Sk4u

src/core/SkNx.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkNx_DEFINED
 #define SkNx_DEFINED
 
@@ skipping 275 matching lines @@
 typedef SkNx<16, SkScalar> Sk16s;
 
 typedef SkNx<4,   uint8_t> Sk4b;
 typedef SkNx<8,   uint8_t> Sk8b;
 typedef SkNx<16,  uint8_t> Sk16b;
 
 typedef SkNx<4,  uint16_t> Sk4h;
 typedef SkNx<8,  uint16_t> Sk8h;
 typedef SkNx<16, uint16_t> Sk16h;
 
-typedef SkNx<4,       int> Sk4i;
+typedef SkNx<4,  int32_t> Sk4i;
+typedef SkNx<4, uint32_t> Sk4u;
 
 // Include platform specific specializations if available.
 #if !defined(SKNX_NO_SIMD) && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
     #include "../opts/SkNx_sse.h"
 #elif !defined(SKNX_NO_SIMD) && defined(SK_ARM_HAS_NEON)
     #include "../opts/SkNx_neon.h"
 #else
 
 SI Sk4i Sk4f_round(const Sk4f& x) {
     return { (int) lrintf (x[0]),
@@ skipping 26 matching lines @@
 
 #endif
 
 SI void Sk4f_ToBytes(uint8_t p[16], const Sk4f& a, const Sk4f& b, const Sk4f& c, const Sk4f& d) {
     SkNx_cast<uint8_t>(SkNx_join(SkNx_join(a,b), SkNx_join(c,d))).store(p);
 }
 
 #undef SI
 
 #endif//SkNx_DEFINED