This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [PATCH]: Integrate gfortran with MPC


Tobias Burnus wrote:

I tried a couple of other Fortran compilers - and the result is:


Intel Fortran Compiler 11.1:
NaN NaN NaN NaN
NaN NaN (NaN,NaN)
InfinityInfinity NaN NaN


and with Intel's icc (9.1): nan + nan i nan + nan i nan + nan i



These tests might not make sense with Intel compilers without setting an option such as '-fp-model precise'
I'll try it when I find a power cord for my laptop



Here is the C code:


#include <stdio.h>
#include <complex.h>

int main()
{
complex double z1, z2, z3;
z1 = 0.0;
z2 = 1.0 + 2.0*I;
z3 = (1.0 + 2.0*I)/0.0;
printf("%f + %f i\n", __real__ (z3), __imag__ (z3));
printf("%f + %f i\n", __real__ (z2/z1), __imag__ (z2/z1));
z3 = z2/z1;
printf("%f + %f i\n", __real__ (z3), __imag__ (z3));
}


And here the Fortran code:


Program test
complex(kind=8) z1, z2, z3;
z1 = 0.0
z2 = cmplx(1.0d0,2.0d0)
z3 = cmplx(1.0d0 + 2.0d0)/0.0d0;
print *, real(z3,kind=8),aimag(z3)
print *, real(z2/z1,kind=8),aimag(z2)
z3 = z2/z1;
print *, real(z3,kind=8),aimag(z3)
end program test


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]