Hi, This is a reformatted patch after Ulrich review:
--- libgcc/ChangeLog: 2013-11-20 Adhemerval Zanella <azane...@linux.vnet.ibm.com> * config/rs6000/ibm-ldouble.c (__gcc_qadd): Fix add of normal number and qNaN to not raise an inexact exception. gcc/testsuite/ChangeLog: 2013-11-20 Adhemerval Zanella <azane...@linux.vnet.ibm.com> * gcc.target/powerpc/pr57363.c: New test. -- diff --git a/gcc/testsuite/gcc.target/powerpc/pr57363.c b/gcc/testsuite/gcc.target/powerpc/pr57363.c new file mode 100644 index 0000000..45ea3f3 --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/pr57363.c @@ -0,0 +1,19 @@ +/* { dg-do run { target { powerpc*-*-linux* } } } */ +/* { dg-options "-mlong-double-128" } */ + +/* Check if adding a qNAN and a normal long double does not generate a + inexact exception. */ + +#define _GNU_SOURCE +#include <fenv.h> + +int main(void) +{ + double x = __builtin_nan (""); + long double y = 1.1L; + + feenableexcept (FE_INEXACT); + feclearexcept (FE_ALL_EXCEPT); + x = x + y; + return fetestexcept(FE_INEXACT); +} diff --git a/libgcc/config/rs6000/ibm-ldouble.c b/libgcc/config/rs6000/ibm-ldouble.c index 28e02e9..7ca900c 100644 --- a/libgcc/config/rs6000/ibm-ldouble.c +++ b/libgcc/config/rs6000/ibm-ldouble.c @@ -104,6 +104,8 @@ __gcc_qadd (double a, double aa, double c, double cc) if (nonfinite (z)) { + if (fabs (z) != inf()) + return z; z = cc + aa + c + a; if (nonfinite (z)) return z;