Revert of SkPx: new approach to fixed-point SIMD

src/opts/SkPx_none.h

Index: src/opts/SkPx_none.h
diff --git a/src/opts/SkPx_none.h b/src/opts/SkPx_none.h
deleted file mode 100644
index a4758c1004105fbd5b67c71c19fefb31f2edaafb..0000000000000000000000000000000000000000
--- a/src/opts/SkPx_none.h
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * 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 SkPx_none_DEFINED
-#define SkPx_none_DEFINED
-
-// Nothing fancy here.  We're the backup _none case after all.
-// Our declared sweet spot is simply a single pixel at a time.
-
-struct SkPx_none {
-    static const int N = 1;
-    uint8_t f8[4];
-
-    SkPx_none(uint32_t px) { memcpy(f8, &px, 4); }
-    SkPx_none(uint8_t x, uint8_t y, uint8_t z, uint8_t a) {
-        f8[0] = x; f8[1] = y; f8[2] = z; f8[3] = a;
-    }
-
-    static SkPx_none Dup(uint32_t px) { return px; }
-    static SkPx_none LoadN(const uint32_t* px) { return *px; }
-    static SkPx_none Load(int n, const uint32_t* px) {
-        SkASSERT(false);  // There are no 0<n<1.
-        return 0;
-    }
-
-    void storeN(uint32_t* px) const { memcpy(px, f8, 4); }
-    void store(int n, uint32_t* px) const {
-        SkASSERT(false);  // There are no 0<n<1.
-    }
-
-    struct Alpha {
-        uint8_t fA;
-        Alpha(uint8_t a) : fA(a) {}
-
-        static Alpha Dup(uint8_t a) { return a; }
-        static Alpha LoadN(const uint8_t* a) { return *a; }
-        static Alpha Load(int n, const uint8_t* a) {
-            SkASSERT(false);  // There are no 0<n<1.
-            return 0;
-        }
-        Alpha inv() const { return 255 - fA; }
-    };
-
-    struct Wide {
-        uint16_t f16[4];
-
-        Wide(uint16_t x, uint16_t y, uint16_t z, uint16_t a) {
-            f16[0] = x; f16[1] = y; f16[2] = z; f16[3] = a;
-        }
-
-        Wide operator+(const Wide& o) const {
-            return Wide(f16[0]+o.f16[0], f16[1]+o.f16[1], f16[2]+o.f16[2], f16[3]+o.f16[3]);
-        }
-        Wide operator-(const Wide& o) const {
-            return Wide(f16[0]-o.f16[0], f16[1]-o.f16[1], f16[2]-o.f16[2], f16[3]-o.f16[3]);
-        }
-        Wide operator<<(int bits) const {
-            return Wide(f16[0]<<bits, f16[1]<<bits, f16[2]<<bits, f16[3]<<bits);
-        }
-        Wide operator>>(int bits) const {
-            return Wide(f16[0]>>bits, f16[1]>>bits, f16[2]>>bits, f16[3]>>bits);
-        }
-
-        SkPx_none addNarrowHi(const SkPx_none& o) const {
-            Wide sum = (*this + o.widenLo()) >> 8;
-            return SkPx_none(sum.f16[0], sum.f16[1], sum.f16[2], sum.f16[3]);
-        }
-    };
-
-    Alpha alpha() const { return f8[3]; }
-
-    Wide widenLo() const { return Wide(f8[0], f8[1], f8[2], f8[3]); }
-    Wide widenHi() const { return this->widenLo() << 8; }
-    Wide widenLoHi() const { return this->widenLo() + this->widenHi(); }
-
-    SkPx_none operator+(const SkPx_none& o) const {
-        return SkPx_none(f8[0]+o.f8[0], f8[1]+o.f8[1], f8[2]+o.f8[2], f8[3]+o.f8[3]);
-    }
-    SkPx_none operator-(const SkPx_none& o) const {
-        return SkPx_none(f8[0]-o.f8[0], f8[1]-o.f8[1], f8[2]-o.f8[2], f8[3]-o.f8[3]);
-    }
-    SkPx_none saturatedAdd(const SkPx_none& o) const {
-        return SkPx_none(SkTMax(0, SkTMin(255, f8[0]+o.f8[0])),
-                         SkTMax(0, SkTMin(255, f8[1]+o.f8[1])),
-                         SkTMax(0, SkTMin(255, f8[2]+o.f8[2])),
-                         SkTMax(0, SkTMin(255, f8[3]+o.f8[3])));
-    }
-
-    Wide operator*(const Alpha& a) const {
-        return Wide(f8[0]*a.fA, f8[1]*a.fA, f8[2]*a.fA, f8[3]*a.fA);
-    }
-    SkPx_none approxMulDiv255(const Alpha& a) const {
-        return (*this * a).addNarrowHi(*this);
-    }
-
-    SkPx_none addAlpha(const Alpha& a) const {
-        return SkPx_none(f8[0], f8[1], f8[2], f8[3]+a.fA);
-    }
-};
-typedef SkPx_none SkPx;
-
-#endif//SkPx_none_DEFINED