On Wed, 10 Sep 2014, Marc Glisse wrote:
> Hello,
>
> according to the C++ standard, numeric_limits::denorm_min should return min
> (not 0) when there are no denormals.
>
> Tested with bootstrap+testsuite on x86_64-linux-gnu. I also tested a basic
> make all-gcc for vax (only target without denormals apparently) and the macro
> did change as expected.
>
> The next step might be to define has_denorm as false in more cases (-mno-ieee
> on alpha, -ffast-math on x86, etc) but that's a different issue.
>
> (this is C++ but I believe Joseph is the floating-point expert, hence the cc)
This is a C issue as well (for C11 *_TRUE_MIN).
> gcc/c-family/
>
> 2014-09-10 Marc Glisse <marc.gli...@inria.fr>
>
PR target/58757
> * c-cppbuiltin.c (builtin_define_float_constants): Correct
> __*_DENORM_MIN__ without denormals.
I think there should be some sort of testcase that these values aren't 0.
--
Joseph S. Myers
jos...@codesourcery.com
