diff options
Diffstat (limited to 'gcc/testsuite/gfortran.dg/nosigned_zero_1.f90')
| -rw-r--r-- | gcc/testsuite/gfortran.dg/nosigned_zero_1.f90 | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/nosigned_zero_1.f90 b/gcc/testsuite/gfortran.dg/nosigned_zero_1.f90 new file mode 100644 index 000000000..51ac87945 --- /dev/null +++ b/gcc/testsuite/gfortran.dg/nosigned_zero_1.f90 @@ -0,0 +1,24 @@ +! { dg-do run } +! +! PR fortran/40675 +! +! Fortran 77 just had: "The value of a signed zero is the same as +! the value of an unsigned zero." and g77 returned for SIGN(1.0, -0.0) = 1.0 +! +! Fortran 95+ has for SIGN: "Case (iv): If B is of type real and is zero, +! then ... (c) If B is negative real zero, the value of the result is -|A|". +! On architectures, where signed zeros are supported, gfortran's SIGN thus +! returns for B=-0.0 the -|A|. +! +program s + x = sign(1.,0.) + y = sign(1.,-0.) + if (x /= 1.) call abort() + if (y /= -1.) call abort() + x = 1. + y = 0. + x = sign(x, y) + y = sign(x, -y) + if (x /= 1.) call abort() + if (y /= -1.) call abort() +end program s |