| /* |
| * 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 |
| |
| |
| #define SKNX_NO_SIMDx // Remove the x to disable SIMD for all SkNx types. |
| |
| |
| #include "SkScalar.h" |
| #include "SkTypes.h" |
| #include <math.h> |
| #define REQUIRE(x) static_assert(x, #x) |
| |
| // The default implementations of SkNi<N,T> and SkNf<N,T> just fall back on a pair of size N/2. |
| template <int N, typename T> |
| class SkNi { |
| public: |
| // For now SkNi is a _very_ minimal sketch just to support comparison operators on SkNf. |
| SkNi() {} |
| SkNi(const SkNi<N/2, T>& lo, const SkNi<N/2, T>& hi) : fLo(lo), fHi(hi) {} |
| bool allTrue() const { return fLo.allTrue() && fHi.allTrue(); } |
| bool anyTrue() const { return fLo.anyTrue() || fHi.anyTrue(); } |
| |
| private: |
| REQUIRE(0 == (N & (N-1))); |
| SkNi<N/2, T> fLo, fHi; |
| }; |
| |
| template <int N, typename T> |
| class SkNf { |
| static SkNi<N,int32_t> ToNi(float); |
| static SkNi<N,int64_t> ToNi(double); |
| typedef decltype(ToNi(T())) Ni; |
| public: |
| SkNf() {} |
| explicit SkNf(T val) : fLo(val), fHi(val) {} |
| static SkNf Load(const T vals[N]) { |
| return SkNf(SkNf<N/2,T>::Load(vals), SkNf<N/2,T>::Load(vals+N/2)); |
| } |
| |
| SkNf(T a, T b) : fLo(a), fHi(b) { REQUIRE(N==2); } |
| SkNf(T a, T b, T c, T d) : fLo(a,b), fHi(c,d) { REQUIRE(N==4); } |
| SkNf(T a, T b, T c, T d, T e, T f, T g, T h) : fLo(a,b,c,d), fHi(e,f,g,h) { REQUIRE(N==8); } |
| |
| void store(T vals[N]) const { |
| fLo.store(vals); |
| fHi.store(vals+N/2); |
| } |
| |
| SkNf operator + (const SkNf& o) const { return SkNf(fLo + o.fLo, fHi + o.fHi); } |
| SkNf operator - (const SkNf& o) const { return SkNf(fLo - o.fLo, fHi - o.fHi); } |
| SkNf operator * (const SkNf& o) const { return SkNf(fLo * o.fLo, fHi * o.fHi); } |
| SkNf operator / (const SkNf& o) const { return SkNf(fLo / o.fLo, fHi / o.fHi); } |
| |
| Ni operator == (const SkNf& o) const { return Ni(fLo == o.fLo, fHi == o.fHi); } |
| Ni operator != (const SkNf& o) const { return Ni(fLo != o.fLo, fHi != o.fHi); } |
| Ni operator < (const SkNf& o) const { return Ni(fLo < o.fLo, fHi < o.fHi); } |
| Ni operator > (const SkNf& o) const { return Ni(fLo > o.fLo, fHi > o.fHi); } |
| Ni operator <= (const SkNf& o) const { return Ni(fLo <= o.fLo, fHi <= o.fHi); } |
| Ni operator >= (const SkNf& o) const { return Ni(fLo >= o.fLo, fHi >= o.fHi); } |
| |
| static SkNf Min(const SkNf& l, const SkNf& r) { |
| return SkNf(SkNf<N/2,T>::Min(l.fLo, r.fLo), SkNf<N/2,T>::Min(l.fHi, r.fHi)); |
| } |
| static SkNf Max(const SkNf& l, const SkNf& r) { |
| return SkNf(SkNf<N/2,T>::Max(l.fLo, r.fLo), SkNf<N/2,T>::Max(l.fHi, r.fHi)); |
| } |
| |
| SkNf sqrt() const { return SkNf(fLo. sqrt(), fHi. sqrt()); } |
| SkNf rsqrt() const { return SkNf(fLo.rsqrt(), fHi.rsqrt()); } |
| |
| SkNf invert() const { return SkNf(fLo. invert(), fHi. invert()); } |
| SkNf approxInvert() const { return SkNf(fLo.approxInvert(), fHi.approxInvert()); } |
| |
| T operator[] (int k) const { |
| SkASSERT(0 <= k && k < N); |
| return k < N/2 ? fLo[k] : fHi[k-N/2]; |
| } |
| |
| private: |
| REQUIRE(0 == (N & (N-1))); |
| SkNf(const SkNf<N/2, T>& lo, const SkNf<N/2, T>& hi) : fLo(lo), fHi(hi) {} |
| |
| SkNf<N/2, T> fLo, fHi; |
| }; |
| |
| |
| // Bottom out the default implementation with scalars when nothing's been specialized. |
| template <typename T> |
| class SkNi<1,T> { |
| public: |
| SkNi() {} |
| explicit SkNi(T val) : fVal(val) {} |
| bool allTrue() const { return (bool)fVal; } |
| bool anyTrue() const { return (bool)fVal; } |
| |
| private: |
| T fVal; |
| }; |
| |
| template <typename T> |
| class SkNf<1,T> { |
| static SkNi<1,int32_t> ToNi(float); |
| static SkNi<1,int64_t> ToNi(double); |
| typedef decltype(ToNi(T())) Ni; |
| public: |
| SkNf() {} |
| explicit SkNf(T val) : fVal(val) {} |
| static SkNf Load(const T vals[1]) { return SkNf(vals[0]); } |
| |
| void store(T vals[1]) const { vals[0] = fVal; } |
| |
| SkNf operator + (const SkNf& o) const { return SkNf(fVal + o.fVal); } |
| SkNf operator - (const SkNf& o) const { return SkNf(fVal - o.fVal); } |
| SkNf operator * (const SkNf& o) const { return SkNf(fVal * o.fVal); } |
| SkNf operator / (const SkNf& o) const { return SkNf(fVal / o.fVal); } |
| |
| Ni operator == (const SkNf& o) const { return Ni(fVal == o.fVal); } |
| Ni operator != (const SkNf& o) const { return Ni(fVal != o.fVal); } |
| Ni operator < (const SkNf& o) const { return Ni(fVal < o.fVal); } |
| Ni operator > (const SkNf& o) const { return Ni(fVal > o.fVal); } |
| Ni operator <= (const SkNf& o) const { return Ni(fVal <= o.fVal); } |
| Ni operator >= (const SkNf& o) const { return Ni(fVal >= o.fVal); } |
| |
| static SkNf Min(const SkNf& l, const SkNf& r) { return SkNf(SkTMin(l.fVal, r.fVal)); } |
| static SkNf Max(const SkNf& l, const SkNf& r) { return SkNf(SkTMax(l.fVal, r.fVal)); } |
| |
| SkNf sqrt() const { return SkNf(Sqrt(fVal)); } |
| SkNf rsqrt() const { return SkNf((T)1 / Sqrt(fVal)); } |
| |
| SkNf invert() const { return SkNf((T)1 / fVal); } |
| SkNf approxInvert() const { return this->invert(); } |
| |
| T operator[] (int SkDEBUGCODE(k)) const { |
| SkASSERT(k == 0); |
| return fVal; |
| } |
| |
| private: |
| // We do double sqrts natively, or via floats for any other type. |
| template <typename U> |
| static U Sqrt(U val) { return (U) ::sqrtf((float)val); } |
| static double Sqrt(double val) { return ::sqrt ( val); } |
| |
| T fVal; |
| }; |
| |
| |
| // Generic syntax sugar that should work equally well for all SkNi and SkNf implementations. |
| template <typename SkNx> SkNx operator - (const SkNx& l) { return SkNx((decltype(l[0]))0) - l; } |
| |
| template <typename SkNx> SkNx& operator += (SkNx& l, const SkNx& r) { return (l = l + r); } |
| template <typename SkNx> SkNx& operator -= (SkNx& l, const SkNx& r) { return (l = l - r); } |
| template <typename SkNx> SkNx& operator *= (SkNx& l, const SkNx& r) { return (l = l * r); } |
| template <typename SkNx> SkNx& operator /= (SkNx& l, const SkNx& r) { return (l = l / r); } |
| |
| |
| // Include platform specific specializations if available. |
| #ifndef SKNX_NO_SIMD |
| #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 |
| #include "../opts/SkNx_sse.h" |
| #elif defined(SK_ARM_HAS_NEON) |
| #include "../opts/SkNx_neon.h" |
| #endif |
| #endif |
| |
| #undef REQUIRE |
| |
| typedef SkNf<2, float> Sk2f; |
| typedef SkNf<2, double> Sk2d; |
| typedef SkNf<2, SkScalar> Sk2s; |
| |
| typedef SkNf<4, float> Sk4f; |
| typedef SkNf<4, double> Sk4d; |
| typedef SkNf<4, SkScalar> Sk4s; |
| |
| typedef SkNi<4, int32_t> Sk4i; |
| |
| #endif//SkNx_DEFINED |