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Float to fixed point conversion problem

Question asked by Krishnamangegowda on Jan 16, 2014
Latest reply on Jan 16, 2014 by Jithul_Janardhanan

Hi,

     We use __builtin_conv_FtoR() to convert floating point values to fixed point values. If we input -1.0F we get 0x8000000, which seems to be correct. However, +1.0F gives 0xffffffff, which is a faulty output. The largest value that gives a correct output is 1.0 – 129*10^-32, which gives 0x7fffff80. What is the reason for that? Why can't we go up to 0x7fffffff?

 

Regards,

Krishna.

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