/* isequald2 - for each of two double slots, if x = y return a mask of ones, else zero
   Copyright (C) 2006, 2007 Sony Computer Entertainment Inc.
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   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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 */

#ifndef ___SIMD_MATH_ISEQUALD2_H___
#define ___SIMD_MATH_ISEQUALD2_H___

#include <simdmath.h>
#include <spu_intrinsics.h>

#include <simdmath/isnand2.h>

static inline vector unsigned long long
_isequald2 (vector double x, vector double y)
{
  vec_uchar16 even = (vec_uchar16)(vec_uint4){ 0x00010203, 0x00010203, 0x08090a0b, 0x08090a0b };
  vec_uchar16 odd = (vec_uchar16)(vec_uint4){ 0x04050607, 0x04050607, 0x0c0d0e0f, 0x0c0d0e0f };
  vec_uchar16 swapEvenOdd = (vec_uchar16)(vec_uint4){ 0x04050607, 0x00010203, 0x0c0d0e0f, 0x08090a0b };
  vec_ullong2 sign = spu_splats(0x8000000000000000ull);
  vec_uint4 cmpeq_i, cmpeq_i_even, cmpeq_i_odd;
  vec_ullong2 bothzero;
   
  cmpeq_i = spu_cmpeq( (vec_int4)x, (vec_int4)y );

  cmpeq_i_even = spu_shuffle( cmpeq_i, cmpeq_i, even );
  cmpeq_i_odd = spu_shuffle( cmpeq_i, cmpeq_i, odd );

  bothzero = spu_andc( spu_or( (vec_ullong2)x, (vec_ullong2)y ), sign );
  bothzero = (vec_ullong2)spu_cmpeq( (vec_uint4)bothzero, 0U );
  bothzero = spu_and( bothzero, spu_shuffle( bothzero, bothzero, swapEvenOdd ) );
   
  return spu_andc( spu_or( (vec_ullong2)spu_and( cmpeq_i_even, cmpeq_i_odd), bothzero), 
		   spu_or( _isnand2( x ), _isnand2( y ) ) );
}

#endif
