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//------------------------------------------------------------------------------
// GB_mx_xsame32: check if two FP32 arrays are equal (ignoring zombies)
//------------------------------------------------------------------------------
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2020, All Rights Reserved.
// http://suitesparse.com See GraphBLAS/Doc/License.txt for license.
//------------------------------------------------------------------------------
#include "GB_mex.h"
bool GB_mx_xsame32 // true if arrays X and Y are the same (ignoring zombies)
(
float *X,
float *Y,
int64_t len, // length of X and Y
int64_t *I, // row indices (for zombies), same length as X and Y
float eps // error tolerance allowed (eps > 0)
)
{
if (X == Y) return (true) ;
if (X == NULL) return (false) ;
if (Y == NULL) return (false) ;
if (I == NULL) return (false) ;
for (int64_t i = 0 ; i < len ; i++)
{
// check X [i] and Y [i], but ignore zombies
if (I [i] >= 0)
{
int c = fpclassify (X [i]) ;
if (c != fpclassify (Y [i])) return (false) ;
if (c == FP_ZERO)
{
// both are zero, which is OK
}
else if (c == FP_INFINITE)
{
// + or -infinity
if (X [i] != Y [i]) return (false) ;
}
else if (c != FP_NAN)
{
// both are normal or subnormal, and nonzero
float err = fabsf (X [i] - Y [i]) / fabsf (X [i]) ;
if (err > eps) return (false) ;
}
}
}
return (true) ;
}
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