how to test for NaN

Kurt Jensen

Genius 5040 points

This always tests true when optimized. Any ideas?

unsigned NaNtest;

memcpy(&NaNtest, &floatValue, sizeof(NaNtest));

NaNtest &= 0x7fc00000;

if (NaNtest == 0x7fc00000)

{

// always executes this code...

}

Archaeologist over 12 years ago

What ISA (CPU) are you using? What version of the compiler are you using (it's not the same as the CCS version).

Kurt Jensen over 12 years ago in reply to Archaeologist

Genius 5040 points

c6748

v7.3.4

Archaeologist over 12 years ago

What is the actual value of floatValue? I would especially like to see the bit pattern.

Are you using big or little endian?

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