[Bug libquadmath/81412] New: roundq

[fjwyhzb at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81412

            Bug ID: 81412
           Summary: roundq
           Product: gcc
           Version: 7.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libquadmath
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fjwyhzb at hotmail dot com
  Target Milestone: ---

Created attachment 41732
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41732&action=edit
roundq-bug.i

$ cat roundq-bug.c
#include <stdio.h>
#include <quadmath.h>

int main(void)
{
  double x = 2147483648.7;
  printf("roundq(%.1f) = %.1f\n", x, (double)roundq(x));
}
$ gcc -save-temps -Wall -Wextra roundq-bug.c -lquadmath
$ ./a.out
roundq(2147483648.7) = 2147483648.7
$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/7.1.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /build/gcc/src/gcc/configure --prefix=/usr --libdir=/usr/lib
--libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info
--with-bugurl=https://bugs.archlinux.org/
--enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared
--enable-threads=posix --enable-libmpx --with-system-zlib --with-isl
--enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu
--disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object
--enable-linker-build-id --enable-lto --enable-plugin
--enable-install-libiberty --with-linker-hash-style=gnu
--enable-gnu-indirect-function --disable-multilib --disable-werror
--enable-checking=release
Thread model: posix
gcc version 7.1.1 20170621 (GCC)