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[Bug c/66613] error in evaluationg cexp
- From: "miyuki at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 21 Jun 2015 21:20:51 +0000
- Subject: [Bug c/66613] error in evaluationg cexp
- Auto-submitted: auto-generated
- References: <bug-66613-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66613
Mikhail Maltsev <miyuki at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |miyuki at gcc dot gnu.org
--- Comment #2 from Mikhail Maltsev <miyuki at gcc dot gnu.org> ---
Presumably, the problem is the difference in precision. But what is
"run_C99.bat"? And what platform do you use?
With current GCC 4.8 branch (x86_64-linux) I get the following result:
$ /opt/gcc-4.8-latest/bin/gcc -std=c99 -lquadmath -lm ./test.c -o test_c99 &&
./test_c99
/**********************************************************************/
SECTION 1
_Complex float zF = 1.F + 2.Fi ;
crealf(cexpf(zF)) = -1.131204
cimagf(cexpf(zF)) = 2.471727
_Complex double zD = 1.D + 2.Di ;
creal(cexp(zD)) = -1.131204E+00
cimag(cexp(zD)) = 2.471727E+00
creal(cexp(1.D + 2.Di)) = -1.131204
cimag(cexp(1.D + 2.Di)) = 2.471727
_Complex long double zL = 1.L + 2.Li
creall(cexpl(zL)) = -3.177877E-189
cimagl(cexpl(zL)) = -3.177877E-189
creall(cexpl(1.L + 2.Li)) = -0.000000
cimagl(cexpl(1.L + 2.Li)) = -0.000000
__complex128 zQ = 1.Q + 2.Qi
crealq(cexpq(zQ)) = 0.000000
cimagq(cexpq(zQ)) = 0.000000
/**********************************************************************/
SECTION 2
alfa =
0.33333334326744079589843750000000000000000000000000000000000000000000000000000000
sizeof(alfa)) = 4
1.f/3.f =
0.33333334326744079589843750000000000000000000000000000000000000000000000000000000
sizeof(1.f/3.f)) = 4
/**********************************************************************/
It is possible that the problem is specific to 4.8.1, but I don't have it
installed right now. If someone has, could you check it please.