Sk4x4f

src/core/Sk4x4f.h

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef Sk4x4f_DEFINED
+#define Sk4x4f_DEFINED
+
+#include "SkNx.h"
+
+struct Sk4x4f {
+    Sk4f r,g,b,a;
+
+    static Sk4x4f Transpose(const Sk4f&, const Sk4f&, const Sk4f&, const Sk4f&);
+    static Sk4x4f Transpose(const   float[16]);
+    static Sk4x4f Transpose(const uint8_t[16]);
+
+    void transpose(Sk4f*, Sk4f*, Sk4f*, Sk4f*) const;
+    void transpose(  float[16]) const;
+    void transpose(uint8_t[16]) const;
+};
+
+// TODO: SSE2, NEON
+
+#if 1 && !defined(SKNX_NO_SIMD) && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
+
+inline Sk4x4f Sk4x4f::Transpose(const Sk4f& x, const Sk4f& y, const Sk4f& z, const Sk4f& w) {
+    auto r = x.fVec,
+         g = y.fVec,
+         b = z.fVec,
+         a = w.fVec;
+    _MM_TRANSPOSE4_PS(r,g,b,a);
+    return { r,g,b,a };
+}
+
+inline Sk4x4f Sk4x4f::Transpose(const float fs[16]) {
+    return Transpose(Sk4f::Load(fs+0), Sk4f::Load(fs+4), Sk4f::Load(fs+8), Sk4f::Load(fs+12));
+}
+
+inline Sk4x4f Sk4x4f::Transpose(const uint8_t bs[16]) {
+    auto b16 = _mm_loadu_si128((const __m128i*)bs);
+    auto _ = ~0;  // Shuffles in a zero byte.
+    auto r = _mm_cvtepi32_ps(
+            _mm_shuffle_epi8(b16, _mm_setr_epi8(0,_,_,_,4,_,_,_, 8,_,_,_,12,_,_,_)));
+    auto g = _mm_cvtepi32_ps(
+            _mm_shuffle_epi8(b16, _mm_setr_epi8(1,_,_,_,5,_,_,_, 9,_,_,_,13,_,_,_)));
+    auto b = _mm_cvtepi32_ps(
+            _mm_shuffle_epi8(b16, _mm_setr_epi8(2,_,_,_,6,_,_,_,10,_,_,_,14,_,_,_)));
+    auto a = _mm_cvtepi32_ps(
+            _mm_shuffle_epi8(b16, _mm_setr_epi8(3,_,_,_,7,_,_,_,11,_,_,_,15,_,_,_)));
+    return { r,g,b,a };
+}
+
+inline void Sk4x4f::transpose(Sk4f* x, Sk4f* y, Sk4f* z, Sk4f* w) const {
+    auto R = r.fVec,
+         G = g.fVec,
+         B = b.fVec,
+         A = a.fVec;
+    _MM_TRANSPOSE4_PS(R,G,B,A);
+    *x = R;
+    *y = G;
+    *z = B;
+    *w = A;
+}
+
+inline void Sk4x4f::transpose(float fs[16]) const {
+    Sk4f x,y,z,w;
+    this->transpose(&x,&y,&z,&w);
+    x.store(fs+ 0);
+    y.store(fs+ 4);
+    z.store(fs+ 8);
+    w.store(fs+12);
+}
+
+inline void Sk4x4f::transpose(uint8_t bs[16]) const {
+    auto packed = _mm_packus_epi16(_mm_packus_epi16(_mm_cvttps_epi32(r.fVec),
+                                                    _mm_cvttps_epi32(g.fVec)),
+                                   _mm_packus_epi16(_mm_cvttps_epi32(b.fVec),
+                                                    _mm_cvttps_epi32(a.fVec)));
+    _mm_storeu_si128((__m128i*)bs, _mm_shuffle_epi8(packed, _mm_setr_epi8(0, 4,  8, 12,
+                                                                          1, 5,  9, 13,
+                                                                          2, 6, 10, 14,
+                                                                          3, 7, 11, 15)));
+}
+
+#else
+
+inline Sk4x4f Sk4x4f::Transpose(const Sk4f& x, const Sk4f& y, const Sk4f& z, const Sk4f& w) {
+    return {
+        { x[0], y[0], z[0], w[0] },
+        { x[1], y[1], z[1], w[1] },
+        { x[2], y[2], z[2], w[2] },
+        { x[3], y[3], z[3], w[3] },
+    };
+}
+
+inline Sk4x4f Sk4x4f::Transpose(const float fs[16]) {
+    return Transpose(Sk4f::Load(fs+0), Sk4f::Load(fs+4), Sk4f::Load(fs+8), Sk4f::Load(fs+12));
+}
+
+inline Sk4x4f Sk4x4f::Transpose(const uint8_t bs[16]) {
+    return {
+        { (float)bs[0], (float)bs[4], (float)bs[ 8], (float)bs[12] },
+        { (float)bs[1], (float)bs[5], (float)bs[ 9], (float)bs[13] },
+        { (float)bs[2], (float)bs[6], (float)bs[10], (float)bs[14] },
+        { (float)bs[3], (float)bs[7], (float)bs[11], (float)bs[15] },
+    };
+}
+
+inline void Sk4x4f::transpose(Sk4f* x, Sk4f* y, Sk4f* z, Sk4f* w) const {
+    *x = { r[0], g[0], b[0], a[0] };
+    *y = { r[1], g[1], b[1], a[1] };
+    *z = { r[2], g[2], b[2], a[2] };
+    *w = { r[3], g[3], b[3], a[3] };
+}
+
+inline void Sk4x4f::transpose(float fs[16]) const {
+    Sk4f x,y,z,w;
+    this->transpose(&x,&y,&z,&w);
+    x.store(fs+ 0);
+    y.store(fs+ 4);
+    z.store(fs+ 8);
+    w.store(fs+12);
+}
+
+inline void Sk4x4f::transpose(uint8_t bs[16]) const {
+    bs[ 0] = (uint8_t)r[0]; bs[ 1] = (uint8_t)g[0]; bs[ 2] = (uint8_t)b[0]; bs[ 3] = (uint8_t)a[0];
+    bs[ 4] = (uint8_t)r[1]; bs[ 5] = (uint8_t)g[1]; bs[ 6] = (uint8_t)b[1]; bs[ 7] = (uint8_t)a[1];
+    bs[ 8] = (uint8_t)r[2]; bs[ 9] = (uint8_t)g[2]; bs[10] = (uint8_t)b[2]; bs[11] = (uint8_t)a[2];
+    bs[12] = (uint8_t)r[3]; bs[13] = (uint8_t)g[3]; bs[14] = (uint8_t)b[3]; bs[15] = (uint8_t)a[3];
+}
+
+#endif
+
+#endif//Sk4x4f_DEFINED