src/opts/SkNx_neon.h - platform/external/skqp - Gitiles

 /*
  * 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_neon_DEFINED
 #define SkNx_neon_DEFINED

 #include <arm_neon.h>

 // Well, this is absurd.  The shifts require compile-time constant arguments.

 #define SHIFT8(op, v, bits) switch(bits) { \
     case  1: return op(v,  1);  case  2: return op(v,  2);  case  3: return op(v,  3); \
     case  4: return op(v,  4);  case  5: return op(v,  5);  case  6: return op(v,  6); \
     case  7: return op(v,  7); \
     } return fVec

 #define SHIFT16(op, v, bits) if (bits < 8) { SHIFT8(op, v, bits); } switch(bits) { \
                                 case  8: return op(v,  8);  case  9: return op(v,  9); \
     case 10: return op(v, 10);  case 11: return op(v, 11);  case 12: return op(v, 12); \
     case 13: return op(v, 13);  case 14: return op(v, 14);  case 15: return op(v, 15); \
     } return fVec

 #define SHIFT32(op, v, bits) if (bits < 16) { SHIFT16(op, v, bits); } switch(bits) { \
     case 16: return op(v, 16);  case 17: return op(v, 17);  case 18: return op(v, 18); \
     case 19: return op(v, 19);  case 20: return op(v, 20);  case 21: return op(v, 21); \
     case 22: return op(v, 22);  case 23: return op(v, 23);  case 24: return op(v, 24); \
     case 25: return op(v, 25);  case 26: return op(v, 26);  case 27: return op(v, 27); \
     case 28: return op(v, 28);  case 29: return op(v, 29);  case 30: return op(v, 30); \
     case 31: return op(v, 31); } return fVec

 template <>
 class SkNb<2, 4> {
 public:
     SkNb(uint32x2_t vec) : fVec(vec) {}

     SkNb() {}
     bool allTrue() const { return vget_lane_u32(fVec, 0) && vget_lane_u32(fVec, 1); }
     bool anyTrue() const { return vget_lane_u32(fVec, 0) || vget_lane_u32(fVec, 1); }

     uint32x2_t fVec;
 };

 template <>
 class SkNb<4, 4> {
 public:
     SkNb(uint32x4_t vec) : fVec(vec) {}

     SkNb() {}
     bool allTrue() const { return vgetq_lane_u32(fVec, 0) && vgetq_lane_u32(fVec, 1)
                                && vgetq_lane_u32(fVec, 2) && vgetq_lane_u32(fVec, 3); }
     bool anyTrue() const { return vgetq_lane_u32(fVec, 0) || vgetq_lane_u32(fVec, 1)
                                || vgetq_lane_u32(fVec, 2) || vgetq_lane_u32(fVec, 3); }

     uint32x4_t fVec;
 };

 template <>
 class SkNf<2, float> {
     typedef SkNb<2, 4> Nb;
 public:
     SkNf(float32x2_t vec) : fVec(vec) {}

     SkNf() {}
     explicit SkNf(float val)           : fVec(vdup_n_f32(val)) {}
     static SkNf Load(const float vals[2]) { return vld1_f32(vals); }
     SkNf(float a, float b) { fVec = (float32x2_t) { a, b }; }

     void store(float vals[2]) const { vst1_f32(vals, fVec); }

     SkNf approxInvert() const {
         float32x2_t est0 = vrecpe_f32(fVec),
                     est1 = vmul_f32(vrecps_f32(est0, fVec), est0);
         return est1;
     }
     SkNf invert() const {
         float32x2_t est1 = this->approxInvert().fVec,
                     est2 = vmul_f32(vrecps_f32(est1, fVec), est1);
         return est2;
     }

     SkNf operator + (const SkNf& o) const { return vadd_f32(fVec, o.fVec); }
     SkNf operator - (const SkNf& o) const { return vsub_f32(fVec, o.fVec); }
     SkNf operator * (const SkNf& o) const { return vmul_f32(fVec, o.fVec); }
     SkNf operator / (const SkNf& o) const {
     #if defined(SK_CPU_ARM64)
         return vdiv_f32(fVec, o.fVec);
     #else
         return vmul_f32(fVec, o.invert().fVec);
     #endif
     }

     Nb operator == (const SkNf& o) const { return vceq_f32(fVec, o.fVec); }
     Nb operator  < (const SkNf& o) const { return vclt_f32(fVec, o.fVec); }
     Nb operator  > (const SkNf& o) const { return vcgt_f32(fVec, o.fVec); }
     Nb operator <= (const SkNf& o) const { return vcle_f32(fVec, o.fVec); }
     Nb operator >= (const SkNf& o) const { return vcge_f32(fVec, o.fVec); }
     Nb operator != (const SkNf& o) const { return vmvn_u32(vceq_f32(fVec, o.fVec)); }

     static SkNf Min(const SkNf& l, const SkNf& r) { return vmin_f32(l.fVec, r.fVec); }
     static SkNf Max(const SkNf& l, const SkNf& r) { return vmax_f32(l.fVec, r.fVec); }

     SkNf rsqrt0() const { return vrsqrte_f32(fVec); }
     SkNf rsqrt1() const {
         float32x2_t est0 = this->rsqrt0().fVec;
         return vmul_f32(vrsqrts_f32(fVec, vmul_f32(est0, est0)), est0);
     }
     SkNf rsqrt2() const {
         float32x2_t est1 = this->rsqrt1().fVec;
         return vmul_f32(vrsqrts_f32(fVec, vmul_f32(est1, est1)), est1);
     }

     SkNf sqrt() const {
     #if defined(SK_CPU_ARM64)
         return vsqrt_f32(fVec);
     #else
         return *this * this->rsqrt2();
     #endif
     }

     template <int k> float kth() const {
         SkASSERT(0 <= k && k < 2);
         return vget_lane_f32(fVec, k&1);
     }

     float32x2_t fVec;
 };

 #if defined(SK_CPU_ARM64)
 template <>
 class SkNb<2, 8> {
 public:
     SkNb(uint64x2_t vec) : fVec(vec) {}

     SkNb() {}
     bool allTrue() const { return vgetq_lane_u64(fVec, 0) && vgetq_lane_u64(fVec, 1); }
     bool anyTrue() const { return vgetq_lane_u64(fVec, 0) || vgetq_lane_u64(fVec, 1); }

     uint64x2_t fVec;
 };

 template <>
 class SkNf<2, double> {
     typedef SkNb<2, 8> Nb;
 public:
     SkNf(float64x2_t vec) : fVec(vec) {}

     SkNf() {}
     explicit SkNf(double val)           : fVec(vdupq_n_f64(val))  {}
     static SkNf Load(const double vals[2]) { return vld1q_f64(vals); }
     SkNf(double a, double b) { fVec = (float64x2_t) { a, b }; }

     void store(double vals[2]) const { vst1q_f64(vals, fVec); }

     SkNf operator + (const SkNf& o) const { return vaddq_f64(fVec, o.fVec); }
     SkNf operator - (const SkNf& o) const { return vsubq_f64(fVec, o.fVec); }
     SkNf operator * (const SkNf& o) const { return vmulq_f64(fVec, o.fVec); }
     SkNf operator / (const SkNf& o) const { return vdivq_f64(fVec, o.fVec); }

     Nb operator == (const SkNf& o) const { return vceqq_f64(fVec, o.fVec); }
     Nb operator  < (const SkNf& o) const { return vcltq_f64(fVec, o.fVec); }
     Nb operator  > (const SkNf& o) const { return vcgtq_f64(fVec, o.fVec); }
     Nb operator <= (const SkNf& o) const { return vcleq_f64(fVec, o.fVec); }
     Nb operator >= (const SkNf& o) const { return vcgeq_f64(fVec, o.fVec); }
     Nb operator != (const SkNf& o) const {
         return vreinterpretq_u64_u32(vmvnq_u32(vreinterpretq_u32_u64(vceqq_f64(fVec, o.fVec))));
     }

     static SkNf Min(const SkNf& l, const SkNf& r) { return vminq_f64(l.fVec, r.fVec); }
     static SkNf Max(const SkNf& l, const SkNf& r) { return vmaxq_f64(l.fVec, r.fVec); }

     SkNf  sqrt() const { return vsqrtq_f64(fVec);  }

     SkNf rsqrt0() const { return vrsqrteq_f64(fVec); }
     SkNf rsqrt1() const {
         float64x2_t est0 = this->rsqrt0().fVec;
         return vmulq_f64(vrsqrtsq_f64(fVec, vmulq_f64(est0, est0)), est0);
     }
     SkNf rsqrt2() const {
         float64x2_t est1 = this->rsqrt1().fVec;
         return vmulq_f64(vrsqrtsq_f64(fVec, vmulq_f64(est1, est1)), est1);
     }

     SkNf approxInvert() const {
         float64x2_t est0 = vrecpeq_f64(fVec),
                     est1 = vmulq_f64(vrecpsq_f64(est0, fVec), est0);
         return est1;
     }

     SkNf invert() const {
         float64x2_t est1 = this->approxInvert().fVec,
                     est2 = vmulq_f64(vrecpsq_f64(est1, fVec), est1),
                     est3 = vmulq_f64(vrecpsq_f64(est2, fVec), est2);
         return est3;
     }

     template <int k> double kth() const {
         SkASSERT(0 <= k && k < 2);
         return vgetq_lane_f64(fVec, k&1);
     }

     float64x2_t fVec;
 };
 #endif//defined(SK_CPU_ARM64)

 template <>
 class SkNi<4, int> {
 public:
     SkNi(const int32x4_t& vec) : fVec(vec) {}

     SkNi() {}
     explicit SkNi(int val) : fVec(vdupq_n_s32(val)) {}
     static SkNi Load(const int vals[4]) { return vld1q_s32(vals); }
     SkNi(int a, int b, int c, int d) { fVec = (int32x4_t) { a, b, c, d }; }

     void store(int vals[4]) const { vst1q_s32(vals, fVec); }

     SkNi operator + (const SkNi& o) const { return vaddq_s32(fVec, o.fVec); }
     SkNi operator - (const SkNi& o) const { return vsubq_s32(fVec, o.fVec); }
     SkNi operator * (const SkNi& o) const { return vmulq_s32(fVec, o.fVec); }

     SkNi operator << (int bits) const { SHIFT32(vshlq_n_s32, fVec, bits); }
     SkNi operator >> (int bits) const { SHIFT32(vshrq_n_s32, fVec, bits); }

     template <int k> int kth() const {
         SkASSERT(0 <= k && k < 4);
         return vgetq_lane_s32(fVec, k&3);
     }

     int32x4_t fVec;
 };

 template <>
 class SkNf<4, float> {
     typedef SkNb<4, 4> Nb;
 public:
     SkNf(float32x4_t vec) : fVec(vec) {}

     SkNf() {}
     explicit SkNf(float val)           : fVec(vdupq_n_f32(val)) {}
     static SkNf Load(const float vals[4]) { return vld1q_f32(vals); }
     SkNf(float a, float b, float c, float d) { fVec = (float32x4_t) { a, b, c, d }; }

     void store(float vals[4]) const { vst1q_f32(vals, fVec); }

     SkNi<4, int> castTrunc() const { return vcvtq_s32_f32(fVec); }

     SkNf approxInvert() const {
         float32x4_t est0 = vrecpeq_f32(fVec),
                     est1 = vmulq_f32(vrecpsq_f32(est0, fVec), est0);
         return est1;
     }
     SkNf invert() const {
         float32x4_t est1 = this->approxInvert().fVec,
                     est2 = vmulq_f32(vrecpsq_f32(est1, fVec), est1);
         return est2;
     }

     SkNf operator + (const SkNf& o) const { return vaddq_f32(fVec, o.fVec); }
     SkNf operator - (const SkNf& o) const { return vsubq_f32(fVec, o.fVec); }
     SkNf operator * (const SkNf& o) const { return vmulq_f32(fVec, o.fVec); }
     SkNf operator / (const SkNf& o) const {
     #if defined(SK_CPU_ARM64)
         return vdivq_f32(fVec, o.fVec);
     #else
         return vmulq_f32(fVec, o.invert().fVec);
     #endif
     }

     Nb operator == (const SkNf& o) const { return vceqq_f32(fVec, o.fVec); }
     Nb operator  < (const SkNf& o) const { return vcltq_f32(fVec, o.fVec); }
     Nb operator  > (const SkNf& o) const { return vcgtq_f32(fVec, o.fVec); }
     Nb operator <= (const SkNf& o) const { return vcleq_f32(fVec, o.fVec); }
     Nb operator >= (const SkNf& o) const { return vcgeq_f32(fVec, o.fVec); }
     Nb operator != (const SkNf& o) const { return vmvnq_u32(vceqq_f32(fVec, o.fVec)); }

     static SkNf Min(const SkNf& l, const SkNf& r) { return vminq_f32(l.fVec, r.fVec); }
     static SkNf Max(const SkNf& l, const SkNf& r) { return vmaxq_f32(l.fVec, r.fVec); }

     SkNf rsqrt0() const { return vrsqrteq_f32(fVec); }
     SkNf rsqrt1() const {
         float32x4_t est0 = this->rsqrt0().fVec;
         return vmulq_f32(vrsqrtsq_f32(fVec, vmulq_f32(est0, est0)), est0);
     }
     SkNf rsqrt2() const {
         float32x4_t est1 = this->rsqrt1().fVec;
         return vmulq_f32(vrsqrtsq_f32(fVec, vmulq_f32(est1, est1)), est1);
     }

     SkNf sqrt() const {
     #if defined(SK_CPU_ARM64)
         return vsqrtq_f32(fVec);
     #else
         return *this * this->rsqrt2();
     #endif
     }

     template <int k> float kth() const {
         SkASSERT(0 <= k && k < 4);
         return vgetq_lane_f32(fVec, k&3);
     }

     float32x4_t fVec;
 };

 template <>
 class SkNi<8, uint16_t> {
 public:
     SkNi(const uint16x8_t& vec) : fVec(vec) {}

     SkNi() {}
     explicit SkNi(uint16_t val) : fVec(vdupq_n_u16(val)) {}
     static SkNi Load(const uint16_t vals[8]) { return vld1q_u16(vals); }

     SkNi(uint16_t a, uint16_t b, uint16_t c, uint16_t d,
          uint16_t e, uint16_t f, uint16_t g, uint16_t h) {
         fVec = (uint16x8_t) { a,b,c,d, e,f,g,h };
     }

     void store(uint16_t vals[8]) const { vst1q_u16(vals, fVec); }

     SkNi operator + (const SkNi& o) const { return vaddq_u16(fVec, o.fVec); }
     SkNi operator - (const SkNi& o) const { return vsubq_u16(fVec, o.fVec); }
     SkNi operator * (const SkNi& o) const { return vmulq_u16(fVec, o.fVec); }

     SkNi operator << (int bits) const { SHIFT16(vshlq_n_u16, fVec, bits); }
     SkNi operator >> (int bits) const { SHIFT16(vshrq_n_u16, fVec, bits); }

     template <int k> uint16_t kth() const {
         SkASSERT(0 <= k && k < 8);
         return vgetq_lane_u16(fVec, k&7);
     }

     uint16x8_t fVec;
 };

 template <>
 class SkNi<16, uint8_t> {
 public:
     SkNi(const uint8x16_t& vec) : fVec(vec) {}

     SkNi() {}
     explicit SkNi(uint8_t val) : fVec(vdupq_n_u8(val)) {}
     static SkNi Load(const uint8_t vals[16]) { return vld1q_u8(vals); }

     SkNi(uint8_t a, uint8_t b, uint8_t c, uint8_t d,
          uint8_t e, uint8_t f, uint8_t g, uint8_t h,
          uint8_t i, uint8_t j, uint8_t k, uint8_t l,
          uint8_t m, uint8_t n, uint8_t o, uint8_t p) {
         fVec = (uint8x16_t) { a,b,c,d, e,f,g,h, i,j,k,l, m,n,o,p };
     }

     void store(uint8_t vals[16]) const { vst1q_u8(vals, fVec); }

     SkNi operator + (const SkNi& o) const { return vaddq_u8(fVec, o.fVec); }
     SkNi operator - (const SkNi& o) const { return vsubq_u8(fVec, o.fVec); }
     SkNi operator * (const SkNi& o) const { return vmulq_u8(fVec, o.fVec); }

     SkNi operator << (int bits) const { SHIFT8(vshlq_n_u8, fVec, bits); }
     SkNi operator >> (int bits) const { SHIFT8(vshrq_n_u8, fVec, bits); }

     template <int k> uint8_t kth() const {
         SkASSERT(0 <= k && k < 15);
         return vgetq_lane_u8(fVec, k&16);
     }

     uint8x16_t fVec;
 };

 #undef SHIFT32
 #undef SHIFT16
 #undef SHIFT8

 #endif//SkNx_neon_DEFINED
	/*
	* 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_neon_DEFINED
	#define SkNx_neon_DEFINED

	#include <arm_neon.h>

	// Well, this is absurd. The shifts require compile-time constant arguments.

	#define SHIFT8(op, v, bits) switch(bits) { \
	case 1: return op(v, 1); case 2: return op(v, 2); case 3: return op(v, 3); \
	case 4: return op(v, 4); case 5: return op(v, 5); case 6: return op(v, 6); \
	case 7: return op(v, 7); \
	} return fVec

	#define SHIFT16(op, v, bits) if (bits < 8) { SHIFT8(op, v, bits); } switch(bits) { \
	case 8: return op(v, 8); case 9: return op(v, 9); \
	case 10: return op(v, 10); case 11: return op(v, 11); case 12: return op(v, 12); \
	case 13: return op(v, 13); case 14: return op(v, 14); case 15: return op(v, 15); \
	} return fVec

	#define SHIFT32(op, v, bits) if (bits < 16) { SHIFT16(op, v, bits); } switch(bits) { \
	case 16: return op(v, 16); case 17: return op(v, 17); case 18: return op(v, 18); \
	case 19: return op(v, 19); case 20: return op(v, 20); case 21: return op(v, 21); \
	case 22: return op(v, 22); case 23: return op(v, 23); case 24: return op(v, 24); \
	case 25: return op(v, 25); case 26: return op(v, 26); case 27: return op(v, 27); \
	case 28: return op(v, 28); case 29: return op(v, 29); case 30: return op(v, 30); \
	case 31: return op(v, 31); } return fVec

	template <>
	class SkNb<2, 4> {
	public:
	SkNb(uint32x2_t vec) : fVec(vec) {}

	SkNb() {}
	bool allTrue() const { return vget_lane_u32(fVec, 0) && vget_lane_u32(fVec, 1); }
	bool anyTrue() const { return vget_lane_u32(fVec, 0) \|\| vget_lane_u32(fVec, 1); }

	uint32x2_t fVec;
	};

	template <>
	class SkNb<4, 4> {
	public:
	SkNb(uint32x4_t vec) : fVec(vec) {}

	SkNb() {}
	bool allTrue() const { return vgetq_lane_u32(fVec, 0) && vgetq_lane_u32(fVec, 1)
	&& vgetq_lane_u32(fVec, 2) && vgetq_lane_u32(fVec, 3); }
	bool anyTrue() const { return vgetq_lane_u32(fVec, 0) \|\| vgetq_lane_u32(fVec, 1)
	\|\| vgetq_lane_u32(fVec, 2) \|\| vgetq_lane_u32(fVec, 3); }

	uint32x4_t fVec;
	};

	template <>
	class SkNf<2, float> {
	typedef SkNb<2, 4> Nb;
	public:
	SkNf(float32x2_t vec) : fVec(vec) {}

	SkNf() {}
	explicit SkNf(float val) : fVec(vdup_n_f32(val)) {}
	static SkNf Load(const float vals[2]) { return vld1_f32(vals); }
	SkNf(float a, float b) { fVec = (float32x2_t) { a, b }; }

	void store(float vals[2]) const { vst1_f32(vals, fVec); }

	SkNf approxInvert() const {
	float32x2_t est0 = vrecpe_f32(fVec),
	est1 = vmul_f32(vrecps_f32(est0, fVec), est0);
	return est1;
	}
	SkNf invert() const {
	float32x2_t est1 = this->approxInvert().fVec,
	est2 = vmul_f32(vrecps_f32(est1, fVec), est1);
	return est2;
	}

	SkNf operator + (const SkNf& o) const { return vadd_f32(fVec, o.fVec); }
	SkNf operator - (const SkNf& o) const { return vsub_f32(fVec, o.fVec); }
	SkNf operator * (const SkNf& o) const { return vmul_f32(fVec, o.fVec); }
	SkNf operator / (const SkNf& o) const {
	#if defined(SK_CPU_ARM64)
	return vdiv_f32(fVec, o.fVec);
	#else
	return vmul_f32(fVec, o.invert().fVec);
	#endif
	}

	Nb operator == (const SkNf& o) const { return vceq_f32(fVec, o.fVec); }
	Nb operator < (const SkNf& o) const { return vclt_f32(fVec, o.fVec); }
	Nb operator > (const SkNf& o) const { return vcgt_f32(fVec, o.fVec); }
	Nb operator <= (const SkNf& o) const { return vcle_f32(fVec, o.fVec); }
	Nb operator >= (const SkNf& o) const { return vcge_f32(fVec, o.fVec); }
	Nb operator != (const SkNf& o) const { return vmvn_u32(vceq_f32(fVec, o.fVec)); }

	static SkNf Min(const SkNf& l, const SkNf& r) { return vmin_f32(l.fVec, r.fVec); }
	static SkNf Max(const SkNf& l, const SkNf& r) { return vmax_f32(l.fVec, r.fVec); }

	SkNf rsqrt0() const { return vrsqrte_f32(fVec); }
	SkNf rsqrt1() const {
	float32x2_t est0 = this->rsqrt0().fVec;
	return vmul_f32(vrsqrts_f32(fVec, vmul_f32(est0, est0)), est0);
	}
	SkNf rsqrt2() const {
	float32x2_t est1 = this->rsqrt1().fVec;
	return vmul_f32(vrsqrts_f32(fVec, vmul_f32(est1, est1)), est1);
	}

	SkNf sqrt() const {
	#if defined(SK_CPU_ARM64)
	return vsqrt_f32(fVec);
	#else
	return this this->rsqrt2();
	#endif
	}

	template <int k> float kth() const {
	SkASSERT(0 <= k && k < 2);
	return vget_lane_f32(fVec, k&1);
	}

	float32x2_t fVec;
	};

	#if defined(SK_CPU_ARM64)
	template <>
	class SkNb<2, 8> {
	public:
	SkNb(uint64x2_t vec) : fVec(vec) {}

	SkNb() {}
	bool allTrue() const { return vgetq_lane_u64(fVec, 0) && vgetq_lane_u64(fVec, 1); }
	bool anyTrue() const { return vgetq_lane_u64(fVec, 0) \|\| vgetq_lane_u64(fVec, 1); }

	uint64x2_t fVec;
	};

	template <>
	class SkNf<2, double> {
	typedef SkNb<2, 8> Nb;
	public:
	SkNf(float64x2_t vec) : fVec(vec) {}

	SkNf() {}
	explicit SkNf(double val) : fVec(vdupq_n_f64(val)) {}
	static SkNf Load(const double vals[2]) { return vld1q_f64(vals); }
	SkNf(double a, double b) { fVec = (float64x2_t) { a, b }; }

	void store(double vals[2]) const { vst1q_f64(vals, fVec); }

	SkNf operator + (const SkNf& o) const { return vaddq_f64(fVec, o.fVec); }
	SkNf operator - (const SkNf& o) const { return vsubq_f64(fVec, o.fVec); }
	SkNf operator * (const SkNf& o) const { return vmulq_f64(fVec, o.fVec); }
	SkNf operator / (const SkNf& o) const { return vdivq_f64(fVec, o.fVec); }

	Nb operator == (const SkNf& o) const { return vceqq_f64(fVec, o.fVec); }
	Nb operator < (const SkNf& o) const { return vcltq_f64(fVec, o.fVec); }
	Nb operator > (const SkNf& o) const { return vcgtq_f64(fVec, o.fVec); }
	Nb operator <= (const SkNf& o) const { return vcleq_f64(fVec, o.fVec); }
	Nb operator >= (const SkNf& o) const { return vcgeq_f64(fVec, o.fVec); }
	Nb operator != (const SkNf& o) const {
	return vreinterpretq_u64_u32(vmvnq_u32(vreinterpretq_u32_u64(vceqq_f64(fVec, o.fVec))));
	}

	static SkNf Min(const SkNf& l, const SkNf& r) { return vminq_f64(l.fVec, r.fVec); }
	static SkNf Max(const SkNf& l, const SkNf& r) { return vmaxq_f64(l.fVec, r.fVec); }

	SkNf sqrt() const { return vsqrtq_f64(fVec); }

	SkNf rsqrt0() const { return vrsqrteq_f64(fVec); }
	SkNf rsqrt1() const {
	float64x2_t est0 = this->rsqrt0().fVec;
	return vmulq_f64(vrsqrtsq_f64(fVec, vmulq_f64(est0, est0)), est0);
	}
	SkNf rsqrt2() const {
	float64x2_t est1 = this->rsqrt1().fVec;
	return vmulq_f64(vrsqrtsq_f64(fVec, vmulq_f64(est1, est1)), est1);
	}

	SkNf approxInvert() const {
	float64x2_t est0 = vrecpeq_f64(fVec),
	est1 = vmulq_f64(vrecpsq_f64(est0, fVec), est0);
	return est1;
	}

	SkNf invert() const {
	float64x2_t est1 = this->approxInvert().fVec,
	est2 = vmulq_f64(vrecpsq_f64(est1, fVec), est1),
	est3 = vmulq_f64(vrecpsq_f64(est2, fVec), est2);
	return est3;
	}

	template <int k> double kth() const {
	SkASSERT(0 <= k && k < 2);
	return vgetq_lane_f64(fVec, k&1);
	}

	float64x2_t fVec;
	};
	#endif//defined(SK_CPU_ARM64)

	template <>
	class SkNi<4, int> {
	public:
	SkNi(const int32x4_t& vec) : fVec(vec) {}

	SkNi() {}
	explicit SkNi(int val) : fVec(vdupq_n_s32(val)) {}
	static SkNi Load(const int vals[4]) { return vld1q_s32(vals); }
	SkNi(int a, int b, int c, int d) { fVec = (int32x4_t) { a, b, c, d }; }

	void store(int vals[4]) const { vst1q_s32(vals, fVec); }

	SkNi operator + (const SkNi& o) const { return vaddq_s32(fVec, o.fVec); }
	SkNi operator - (const SkNi& o) const { return vsubq_s32(fVec, o.fVec); }
	SkNi operator * (const SkNi& o) const { return vmulq_s32(fVec, o.fVec); }

	SkNi operator << (int bits) const { SHIFT32(vshlq_n_s32, fVec, bits); }
	SkNi operator >> (int bits) const { SHIFT32(vshrq_n_s32, fVec, bits); }

	template <int k> int kth() const {
	SkASSERT(0 <= k && k < 4);
	return vgetq_lane_s32(fVec, k&3);
	}

	int32x4_t fVec;
	};

	template <>
	class SkNf<4, float> {
	typedef SkNb<4, 4> Nb;
	public:
	SkNf(float32x4_t vec) : fVec(vec) {}

	SkNf() {}
	explicit SkNf(float val) : fVec(vdupq_n_f32(val)) {}
	static SkNf Load(const float vals[4]) { return vld1q_f32(vals); }
	SkNf(float a, float b, float c, float d) { fVec = (float32x4_t) { a, b, c, d }; }

	void store(float vals[4]) const { vst1q_f32(vals, fVec); }

	SkNi<4, int> castTrunc() const { return vcvtq_s32_f32(fVec); }

	SkNf approxInvert() const {
	float32x4_t est0 = vrecpeq_f32(fVec),
	est1 = vmulq_f32(vrecpsq_f32(est0, fVec), est0);
	return est1;
	}
	SkNf invert() const {
	float32x4_t est1 = this->approxInvert().fVec,
	est2 = vmulq_f32(vrecpsq_f32(est1, fVec), est1);
	return est2;
	}

	SkNf operator + (const SkNf& o) const { return vaddq_f32(fVec, o.fVec); }
	SkNf operator - (const SkNf& o) const { return vsubq_f32(fVec, o.fVec); }
	SkNf operator * (const SkNf& o) const { return vmulq_f32(fVec, o.fVec); }
	SkNf operator / (const SkNf& o) const {
	#if defined(SK_CPU_ARM64)
	return vdivq_f32(fVec, o.fVec);
	#else
	return vmulq_f32(fVec, o.invert().fVec);
	#endif
	}

	Nb operator == (const SkNf& o) const { return vceqq_f32(fVec, o.fVec); }
	Nb operator < (const SkNf& o) const { return vcltq_f32(fVec, o.fVec); }
	Nb operator > (const SkNf& o) const { return vcgtq_f32(fVec, o.fVec); }
	Nb operator <= (const SkNf& o) const { return vcleq_f32(fVec, o.fVec); }
	Nb operator >= (const SkNf& o) const { return vcgeq_f32(fVec, o.fVec); }
	Nb operator != (const SkNf& o) const { return vmvnq_u32(vceqq_f32(fVec, o.fVec)); }

	static SkNf Min(const SkNf& l, const SkNf& r) { return vminq_f32(l.fVec, r.fVec); }
	static SkNf Max(const SkNf& l, const SkNf& r) { return vmaxq_f32(l.fVec, r.fVec); }

	SkNf rsqrt0() const { return vrsqrteq_f32(fVec); }
	SkNf rsqrt1() const {
	float32x4_t est0 = this->rsqrt0().fVec;
	return vmulq_f32(vrsqrtsq_f32(fVec, vmulq_f32(est0, est0)), est0);
	}
	SkNf rsqrt2() const {
	float32x4_t est1 = this->rsqrt1().fVec;
	return vmulq_f32(vrsqrtsq_f32(fVec, vmulq_f32(est1, est1)), est1);
	}

	SkNf sqrt() const {
	#if defined(SK_CPU_ARM64)
	return vsqrtq_f32(fVec);
	#else
	return this this->rsqrt2();
	#endif
	}

	template <int k> float kth() const {
	SkASSERT(0 <= k && k < 4);
	return vgetq_lane_f32(fVec, k&3);
	}

	float32x4_t fVec;
	};

	template <>
	class SkNi<8, uint16_t> {
	public:
	SkNi(const uint16x8_t& vec) : fVec(vec) {}

	SkNi() {}
	explicit SkNi(uint16_t val) : fVec(vdupq_n_u16(val)) {}
	static SkNi Load(const uint16_t vals[8]) { return vld1q_u16(vals); }

	SkNi(uint16_t a, uint16_t b, uint16_t c, uint16_t d,
	uint16_t e, uint16_t f, uint16_t g, uint16_t h) {
	fVec = (uint16x8_t) { a,b,c,d, e,f,g,h };
	}

	void store(uint16_t vals[8]) const { vst1q_u16(vals, fVec); }

	SkNi operator + (const SkNi& o) const { return vaddq_u16(fVec, o.fVec); }
	SkNi operator - (const SkNi& o) const { return vsubq_u16(fVec, o.fVec); }
	SkNi operator * (const SkNi& o) const { return vmulq_u16(fVec, o.fVec); }

	SkNi operator << (int bits) const { SHIFT16(vshlq_n_u16, fVec, bits); }
	SkNi operator >> (int bits) const { SHIFT16(vshrq_n_u16, fVec, bits); }

	template <int k> uint16_t kth() const {
	SkASSERT(0 <= k && k < 8);
	return vgetq_lane_u16(fVec, k&7);
	}

	uint16x8_t fVec;
	};

	template <>
	class SkNi<16, uint8_t> {
	public:
	SkNi(const uint8x16_t& vec) : fVec(vec) {}

	SkNi() {}
	explicit SkNi(uint8_t val) : fVec(vdupq_n_u8(val)) {}
	static SkNi Load(const uint8_t vals[16]) { return vld1q_u8(vals); }

	SkNi(uint8_t a, uint8_t b, uint8_t c, uint8_t d,
	uint8_t e, uint8_t f, uint8_t g, uint8_t h,
	uint8_t i, uint8_t j, uint8_t k, uint8_t l,
	uint8_t m, uint8_t n, uint8_t o, uint8_t p) {
	fVec = (uint8x16_t) { a,b,c,d, e,f,g,h, i,j,k,l, m,n,o,p };
	}

	void store(uint8_t vals[16]) const { vst1q_u8(vals, fVec); }

	SkNi operator + (const SkNi& o) const { return vaddq_u8(fVec, o.fVec); }
	SkNi operator - (const SkNi& o) const { return vsubq_u8(fVec, o.fVec); }
	SkNi operator * (const SkNi& o) const { return vmulq_u8(fVec, o.fVec); }

	SkNi operator << (int bits) const { SHIFT8(vshlq_n_u8, fVec, bits); }
	SkNi operator >> (int bits) const { SHIFT8(vshrq_n_u8, fVec, bits); }

	template <int k> uint8_t kth() const {
	SkASSERT(0 <= k && k < 15);
	return vgetq_lane_u8(fVec, k&16);
	}

	uint8x16_t fVec;
	};

	#undef SHIFT32
	#undef SHIFT16
	#undef SHIFT8

	#endif//SkNx_neon_DEFINED