strtod_l.c (___STRTOF_INTERNAL): Fix exponent reading.

2012-12-03  Tobias Burnus  <burnus@net-b.de>

        * strtod/strtod_l.c (___STRTOF_INTERNAL): Fix exponent
        reading.

2012-12-03  Tobias Burnus  <burnus@net-b.de>

        * gfortran.dg/quad_3.f90: New.

From-SVN: r194100

gcc/testsuite/ChangeLog

+2012-12-03  Tobias Burnus  <burnus@net-b.de>
+
+	* gfortran.dg/quad_3.f90: New.
+
 2012-12-03  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/54170

gcc/testsuite/gfortran.dg/quad_3.f90

+! { dg-do run }
+!
+! I/O test for REAL(16)
+!
+! Contributed by Dominique d'Humieres
+!
+program test_qp
+   use iso_fortran_env, only: real_kinds
+   implicit none
+   integer, parameter :: QP = real_kinds(ubound(real_kinds,dim=1))
+   real(kind=qp) :: a,b(2), c
+   integer :: exponent
+   character(len=180) :: tmp
+
+   ! Run this only with libquadmath; assume that all those systems
+   ! have also kind=10.
+   if (size (real_kinds) >= 4 .and. real_kinds(3) == 10 .and. qp == 16) then
+     exponent = 4000
+     b(:) = huge (1.0_qp)/10.0_qp**exponent
+!     print *, 'real(16) big value:      ', b(1)
+     write (tmp, *) b
+     read (tmp, *) a, c
+!     print *, 'same value read again:   ', a, c
+!     print *, 'difference: looks OK now ', a-b(1)
+     if (a-b(1) /= 0.0_qp .or. c-b(1) /= 0.0_qp) call abort()
+   end if
+end program test_qp

libquadmath/ChangeLog

+2012-12-03  Tobias Burnus  <burnus@net-b.de>
+
+	* strtod/strtod_l.c (___STRTOF_INTERNAL): Fix exponent
+	reading.
+
 2012-11-25  Tobias Burnus  <burnus@net-b.de>
 
 	PR libquadmath/55462

libquadmath/strtod/strtod_l.c

@@ -1005,6 +1005,9 @@ ____STRTOF_INTERNAL (nptr, endptr, group)
 		  /* NOTREACHED */
 		}
 
+	      exponent *= 10;
+	      exponent += c - L_('0');
+
 	      c = *++cp;
 	    }
 	  while (c >= L_('0') && c <= L_('9'));