Add Sk4f::ToBytes(uint8_t[16], Sk4f, Sk4f, Sk4f, Sk4f)

src/opts/SkNx_sse.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_sse_DEFINED
 #define SkNx_sse_DEFINED
 
@@ skipping 114 matching lines @@
     SkNx(float a, float b, float c, float d) : fVec(_mm_setr_ps(a,b,c,d)) {}
 
     void store(float vals[4]) const { _mm_storeu_ps(vals, fVec); }
     void toBytes(uint8_t bytes[4]) const {
         __m128i fix8_32 = _mm_cvttps_epi32(fVec),
                 fix8_16 = _mm_packus_epi16(fix8_32, fix8_32),
                 fix8    = _mm_packus_epi16(fix8_16, fix8_16);
         *(int*)bytes = _mm_cvtsi128_si32(fix8);
     }
 
+    static void ToBytes(uint8_t bytes[16],
+                        const SkNx& a, const SkNx& b, const SkNx& c, const SkNx& d) {
+        _mm_storeu_si128((__m128i*)bytes,
+                         _mm_packus_epi16(_mm_packus_epi16(_mm_cvttps_epi32(a.fVec),
+                                                           _mm_cvttps_epi32(b.fVec)),
+                                          _mm_packus_epi16(_mm_cvttps_epi32(c.fVec),
+                                                           _mm_cvttps_epi32(d.fVec))));
+    }
+
     SkNx operator + (const SkNx& o) const { return _mm_add_ps(fVec, o.fVec); }
     SkNx operator - (const SkNx& o) const { return _mm_sub_ps(fVec, o.fVec); }
     SkNx operator * (const SkNx& o) const { return _mm_mul_ps(fVec, o.fVec); }
     SkNx operator / (const SkNx& o) const { return _mm_div_ps(fVec, o.fVec); }
 
     SkNx operator == (const SkNx& o) const { return _mm_cmpeq_ps (fVec, o.fVec); }
     SkNx operator != (const SkNx& o) const { return _mm_cmpneq_ps(fVec, o.fVec); }
     SkNx operator  < (const SkNx& o) const { return _mm_cmplt_ps (fVec, o.fVec); }
     SkNx operator  > (const SkNx& o) const { return _mm_cmpgt_ps (fVec, o.fVec); }
     SkNx operator <= (const SkNx& o) const { return _mm_cmple_ps (fVec, o.fVec); }
@@ skipping 141 matching lines @@
 
 
 template<>
 inline SkNx<4, int> SkNx_cast<int, float, 4>(const SkNx<4, float>& src) {
     return _mm_cvttps_epi32(src.fVec);
 }
 
 }  // namespace
 
 #endif//SkNx_sse_DEFINED