/* isnand2 - for each of two double slots, if input is any type of NaN return mask of ones, else 0
   Copyright (C) 2006, 2007 Sony Computer Entertainment Inc.
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 */

#ifndef ___SIMD_MATH_ISNAND2_H___
#define ___SIMD_MATH_ISNAND2_H___

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

static inline vector unsigned long long
_isnand2 (vector double x)
{
  vec_double2 xneg;
  vec_ullong2 cmpgt, cmpeq, cmpnan;
  vec_uchar16 even = (vec_uchar16)(vec_uint4){ 0x00010203, 0x00010203, 0x08090a0b, 0x08090a0b };
  vec_uchar16 odd = (vec_uchar16)(vec_uint4){ 0x04050607, 0x04050607, 0x0c0d0e0f, 0x0c0d0e0f };
  vec_uint4   expmask = (vec_uint4)spu_splats(0xfff0000000000000ull);

  xneg = (vec_double2)spu_or( (vec_ullong2)x, spu_splats(0x8000000000000000ull) );
  cmpgt = (vec_ullong2)spu_cmpgt( (vec_uint4)xneg, expmask );
  cmpeq = (vec_ullong2)spu_cmpeq( (vec_uint4)xneg, expmask );

  cmpnan = spu_or( spu_shuffle( cmpgt, cmpgt, even ),
		   spu_and( spu_shuffle( cmpeq, cmpeq, even ), 
			    spu_shuffle( cmpgt, cmpgt, odd ) ) );

  return cmpnan;
}

#endif
