It took some time to get know using GDB, but upto some end I got it to work. The enum real_value_class is used to classify the number into zero, normal, infinity and NaN. This class is represented by r->cl in real_value and values in struct real_value are used as flags or representations while string to real conversion (real_from_string) in real.c and other functions. The decimal/hex string value is converted into real in real_from_string function with byte-byte comparison which also include mpfr. (Correct me if I am wrong.) What is the significance of mpfr related to these internal representations? Thanks.
-Tejas On Wed, 23 Jan 2019 at 23:06, Joseph Myers <jos...@codesourcery.com> wrote: > > On Wed, 23 Jan 2019, Tejas Joshi wrote: > > > But I really dont know how to inspect a file like real.h > > (real_value)/real.c? > > Use cc1 to build a test program with selected floating-point constants in > it. Set breakpoints on appropriate functions in real.c (e.g. related to > converting strings for real constants into the internal representation). > Look at the representation produced for those constants to determine the > particular conventions being used. > > -- > Joseph S. Myers > jos...@codesourcery.com
