Is there any way to change the rounding mode when doing operations with GMP? Or do I have to use MPFR for that?
Thanks in advance!
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Is there any way to change the rounding mode when doing operations with GMP? Or do I have to use MPFR for that?
Thanks in advance!
Yes, you should use MPFR if you want to control rounding.
The good news is it’s relatively trivial to initialize an mpfr_t from an mpf_t, so you can throw it in where you need the rounding control, if you don’t want to convert everything over.
See: http://www.mpfr.org/mpfr-current/mpfr.html