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how is __float128 is defined by gcc. what is the typedef. 128but numbers can be represented in different ways like, double double, char float128[16], or int float128[4]

How is __float128 defined?

user3269940
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    possible duplicate of [long double (GCC specific) and \_\_float128](http://stackoverflow.com/questions/13516476/long-double-gcc-specific-and-float128) – Ross Drew Feb 04 '14 at 08:14

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long double does not have a standardized format, in various implementations it could be a synonym to double, or 80-bit Intel format or quadruple-precision IEEE floating point format or something else.

It GCC, __float128 is IEEE binary128 on the amd64 and hp-pa.

chill
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