Number of significand bits in long double?

Stefan Farfeleder stefan at fafoe.narf.at
Thu Aug 4 18:02:36 GMT 2005


On Thu, Aug 04, 2005 at 09:26:18AM -0700, Steve Kargl wrote:
> Can someone confirm or refute that the long double type
> has 53 bits in its significand on i386?  Which header 
> file in /usr/include provides this info?

The type long double has 64 mantissa bits, however we set the FPU to
53-bit precision to get double computations right.

Stefan


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