Testsuite/Fortran: gfortran.dg/pr96711.f90 - fix expected value for PowerPC [PR96983]

gcc/testsuite/ChangeLog:

	PR fortran/96983
	* gfortran.dg/pr96711.f90: Use 2**digit(x) instead of a hard-coded value;
	add comments regarding what the code does.

diff --git a/gcc/testsuite/gfortran.dg/pr96711.f90 b/gcc/testsuite/gfortran.dg/pr96711.f90
index 3761a8e..3fa5d99 100644 (file)
--- a/gcc/testsuite/gfortran.dg/pr96711.f90
+++ b/gcc/testsuite/gfortran.dg/pr96711.f90
@@ -10,10 +10,12 @@ program p
   implicit none
   real(8)                :: x
   real(16)               :: y
+  ! Assume radix(x) == 2
+  ! 2/epsilon(x) = 2/(radix(x)**(1-digits(x)) = 2**digits(x) with that assumption
   integer(16), parameter :: k1 = nint (2 / epsilon (x), kind(k1))
   integer(16), parameter :: k2 = nint (2 / epsilon (y), kind(k2))
-  integer(16), parameter :: m1 = 9007199254740992_16                    !2**53
-  integer(16), parameter :: m2 = 10384593717069655257060992658440192_16 !2**113
+  integer(16), parameter :: m1 = 2_16**digits(x) ! IEEE: 2**53
+  integer(16), parameter :: m2 = 2_16**digits(y) ! IEEE: 2**113
   integer(16), volatile  :: m
   x = 2 / epsilon (x)
   y = 2 / epsilon (y)