This is the mail archive of the mailing list for the glibc 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: Fwd: [PATCH, libgcc]: Avoid "left shift count >= width of type" warnings in soft-fp code

On Tue, Nov 26, 2013 at 12:31 AM, Joseph S. Myers
<> wrote:
> I don't see why the op-2.h change should be needed - the code with the
> problem shift is already inside the "else" part of a ((rsize <=
> _FP_W_TYPE_SIZE) ? : ...) conditional, and the reason ?: is used here
> instead of if/else is exactly to avoid such warnings; putting in a second
> nested such conditional with the same condition shouldn't make any
> difference.

You are right. I have added op-2.h mechanically, following op-4.h change.

Attached patch also compiles gcc soft-fp without problems for x86_64
64bit and 32bit multilibs, so the build exercises op-4.h as well as
op-2.h headers.

Re-tested on x86_64 multilib gcc bootstrap and regression test.

2013-11-25  Uros Bizjak  <>

    * soft-fp/op-4.h (_FP_FRAC_ASSEMBLE_4): Check rsize against
    _FP_W_TYPE_SIZE to avoid "left shift count >= width of type" warning.


Attachment: l.diff.txt
Description: Text document

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