Sk4px

Xfermode_SrcOver:
   SSE: 2.08ms -> 2.03ms  (~2% faster)
   NEON: my N5 is noisy, but there appears to be no perf change

BUG=skia:

Review URL: https://codereview.chromium.org/1132273004

1 files changed, 39 insertions, 0 deletions

diff --git a/src/opts/Sk4px_SSE2.h b/src/opts/Sk4px_SSE2.h
new file mode 100644
index 0000000000..d036328c14
--- /dev/null
+++ b/src/opts/Sk4px_SSE2.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+inline Sk4px::Sk4px(SkPMColor px) : INHERITED(_mm_set1_epi32(px)) {}
+
+inline Sk4px Sk4px::Load4(const SkPMColor px[4]) {
+    return Sk16b(_mm_loadu_si128((const __m128i*)px));
+}
+inline Sk4px Sk4px::Load2(const SkPMColor px[2]) {
+    return Sk16b(_mm_loadl_epi64((const __m128i*)px));
+}
+inline Sk4px Sk4px::Load1(const SkPMColor px[1]) { return Sk16b(_mm_cvtsi32_si128(*px)); }
+
+inline void Sk4px::store4(SkPMColor px[4]) const { _mm_storeu_si128((__m128i*)px, this->fVec); }
+inline void Sk4px::store2(SkPMColor px[2]) const { _mm_storel_epi64((__m128i*)px, this->fVec); }
+inline void Sk4px::store1(SkPMColor px[1]) const { *px = _mm_cvtsi128_si32(this->fVec); }
+
+inline Sk4px::Wide Sk4px::widenLo() const {
+    return Sk16h(_mm_unpacklo_epi8(this->fVec, _mm_setzero_si128()),
+                 _mm_unpackhi_epi8(this->fVec, _mm_setzero_si128()));
+}
+
+inline Sk4px::Wide Sk4px::widenHi() const {
+    return Sk16h(_mm_unpacklo_epi8(_mm_setzero_si128(), this->fVec),
+                 _mm_unpackhi_epi8(_mm_setzero_si128(), this->fVec));
+}
+
+inline Sk4px::Wide Sk4px::mulWiden(const Sk16b& other) const {
+    return this->widenLo() * Sk4px(other).widenLo();
+}
+
+inline Sk4px Sk4px::Wide::addNarrowHi(const Sk16h& other) const {
+    Sk4px::Wide r = (*this + other) >> 8;
+    return Sk4px(_mm_packus_epi16(r.fLo.fVec, r.fHi.fVec));
+}