#ifndef L1Algo_F32vec4P4_H
#define L1Algo_F32vec4P4_H


#include <iostream>
#include <cmath>
#include "xmmintrin.h"
#include "vec_arithmetic.h"

/**********************************
 *
 *   Vector of four single floats
 *
 **********************************/

//#pragma pack(push,16)/* Must ensure class & union 16-B aligned */

//typedef __m128 VectorFloat __attribute__ ((aligned(16)));

const union
{
  float f;
  int i;
} __f_one = {(float)1.};

const union
{
    int i[4];
    __m128 m;
} 
__f32vec4_abs_mask_cheat = {0x7fffffff, 0x7fffffff, 0x7fffffff, 0x7fffffff},
__f32vec4_sgn_mask_cheat = {0x80000000, 0x80000000, 0x80000000, 0x80000000},
__f32vec4_zero_cheat     = {         0,          0,          0,          0},
__f32vec4_one_cheat      = {__f_one.i , __f_one.i , __f_one.i , __f_one.i },
__f32vec4_true_cheat     = {0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF},
__f32vec4_false_cheat    = {0x00000000, 0x00000000, 0x00000000, 0x00000000};

#define _f32vec4_abs_mask ((F32vec4)__f32vec4_abs_mask_cheat.m)
#define _f32vec4_sgn_mask ((F32vec4)__f32vec4_sgn_mask_cheat.m)
#define _f32vec4_zero     ((F32vec4)__f32vec4_zero_cheat.m)
#define _f32vec4_one      ((F32vec4)__f32vec4_one_cheat.m)
#define _f32vec4_true     ((F32vec4)__f32vec4_true_cheat.m)
#define _f32vec4_false    ((F32vec4)__f32vec4_false_cheat.m)

class F32vec4 
{
 public:

  __m128 v;

  float & operator[]( int i ){ return ((float*)&v)[i]; }
  float   operator[]( int i ) const { return ((float*)&v)[i]; }

  F32vec4( ){}
  F32vec4( const __m128 &a ) { v = a; }
  F32vec4( const float &a )  { v = _mm_set_ps1(a); }

  F32vec4( const float &f0, const float &f1, const float &f2, const float &f3 ){ 
    v = _mm_set_ps(f3,f2,f1,f0); 
  }

  /* Conversion function */
  operator  __m128() const { return v; }		/* Convert to __m128 */

  /* Arithmetic Operators */
  friend F32vec4 operator +(const F32vec4 &a, const F32vec4 &b) { return _mm_add_ps(a,b); }
  friend F32vec4 operator -(const F32vec4 &a, const F32vec4 &b) { return _mm_sub_ps(a,b); } 
  friend F32vec4 operator *(const F32vec4 &a, const F32vec4 &b) { return _mm_mul_ps(a,b); } 
  friend F32vec4 operator /(const F32vec4 &a, const F32vec4 &b) { return _mm_div_ps(a,b); }

  /* Functions */
  friend F32vec4 min( const F32vec4 &a, const F32vec4 &b ){ return _mm_min_ps(a, b); }
  friend F32vec4 max( const F32vec4 &a, const F32vec4 &b ){ return _mm_max_ps(a, b); }

  /* Square Root */
  friend F32vec4 sqrt ( const F32vec4 &a ){ return _mm_sqrt_ps (a); }

  /* Reciprocal( inverse) Square Root */
  friend F32vec4 rsqrt( const F32vec4 &a ){ return _mm_rsqrt_ps(a); }

  /* Reciprocal (inversion) */
  friend F32vec4 rcp  ( const F32vec4 &a ){ return _mm_rcp_ps  (a); }
  //friend F32vec4 rcp  ( const F32vec4 &a ){ return 1./a; }

  /* Absolute value */
  friend F32vec4 fabs(const F32vec4 &a){ return _mm_and_ps(a, _f32vec4_abs_mask); }

  /* Sign */
  friend F32vec4 sgn(const F32vec4 &a){ return _mm_or_ps(_mm_and_ps(a, _f32vec4_sgn_mask),_f32vec4_one); }
  friend F32vec4 asgnb(const F32vec4 &a, const F32vec4 &b ){ 
    return _mm_or_ps(_mm_and_ps(b, _f32vec4_sgn_mask),a); 
  }

  /* Logical */
 
  friend F32vec4 operator&( const F32vec4 &a, const F32vec4 &b ){ // mask returned
    return _mm_and_ps(a, b);
  }
  friend F32vec4 operator|( const F32vec4 &a, const F32vec4 &b ){ // mask returned
    return _mm_or_ps(a, b);
  }
  friend F32vec4 operator^( const F32vec4 &a, const F32vec4 &b ){ // mask returned
    return _mm_xor_ps(a, b);
  }
  friend F32vec4 operator!( const F32vec4 &a ){ // mask returned
    return _mm_xor_ps(a, _f32vec4_true);
  }
  friend F32vec4 operator||( const F32vec4 &a, const F32vec4 &b ){ // mask returned
    return _mm_or_ps(a, b);
  }

  /* Comparison */

  friend F32vec4 operator<( const F32vec4 &a, const F32vec4 &b ){ // mask returned
    return _mm_cmplt_ps(a, b);
  }

  /* Non intrinsic functions */

#define _f1(A,F) F32vec4( F(A[0]), F(A[1]), F(A[2]), F(A[3]) ) 

  friend F32vec4 exp( const F32vec4 &a ){ return _f1( a, exp ); } 
  friend F32vec4 log( const F32vec4 &a ){ return _f1( a, log ); } 
  friend F32vec4 sin( const F32vec4 &a ){ return _f1( a, sin ); } 
  friend F32vec4 cos( const F32vec4 &a ){ return _f1( a, cos ); } 

#undef _f1

  /* Define all operators for consistensy */
  
  vec_arithmetic(F32vec4,float);

  friend std::ostream & operator<<(std::ostream &strm, const F32vec4 &a ){
    strm<<a[0]<<" "<<a[1]<<" "<<a[2]<<" "<<a[3];
    return strm;
  }

  friend std::istream & operator>>(std::istream &strm, F32vec4 &a ){
    float tmp;
    strm>>tmp;
    a = tmp;
    return strm;
  }

} __attribute__ ((aligned(16)));


typedef F32vec4 fvec;
typedef float  fscal;
const int fvecLen = 4;
//#define fvec_true  _f32vec4_true
//#define fvec_false _f32vec4_false
#define _fvecalignment  __attribute__ ((aligned(16)))


#endif