[Bug c/102498] wrong output of printf with long double constant (pi) and non-default rounding mode

[vincent-gcc at vinc17 dot net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102498

--- Comment #1 from Vincent Lefèvre <vincent-gcc at vinc17 dot net> ---
A testcase without printf:

#include <fenv.h>

#define X 0xc.90fdaa22168c235p-2l
#define Y 0xc.90fdaa22168c234p-2l

int main (void)
{
  volatile long double x, y;

  fesetround (FE_TOWARDZERO);
  x = X;
  y = Y;
  return x - y == ((X) - (Y)) ? 0 : 1;
}

GCC returns 1 instead of 0.