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PR fortran/55539 Fix regression in -fno-sign-zero. 

libgfortran ChangeLog:

2012-12-26  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/55539
	* io/write_float.def (output_float): Take into account decimal dot.

testsuite ChangeLog:

2012-12-26  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/55539
	* gfortran.dg/nosigned_zero_3.f90: New testcase.

From-SVN: r194717
This commit is contained in:
Janne Blomqvist 2012-12-26 00:11:16 +02:00
parent e255044e71
commit eb3119f90f
4 changed files with 32 additions and 3 deletions
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5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-12-26 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/55539
* gfortran.dg/nosigned_zero_3.f90: New testcase.
2012-12-23 Tobias Burnus <burnus@net-b.de>
PR fortran/54884

15
gcc/testsuite/gfortran.dg/nosigned_zero_3.f90 Normal file
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@ -0,0 +1,15 @@
! { dg-do run }
! { dg-options "-fno-sign-zero" }
!
! PR fortran/55539
!
program nosigned_zero_3
implicit none
character(len=20) :: s
real(4) :: x = -1.2e-3
real(8) :: y = -1.2e-3
write(s,'(7f10.3)') x
if (trim(adjustl(s)) /= "-0.001") call abort
write(s, '(7f10.3)') y
if (trim(adjustl(s)) /= "-0.001") call abort
end program nosigned_zero_3

6
libgfortran/ChangeLog
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@ -1,3 +1,9 @@
2012-12-26 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/55539
* io/write_float.def (output_float): Take into account decimal
dot.
2012-12-21 Thomas Koenig <tkoenig@gcc.gnu.org>
PR libfortran/30162

9
libgfortran/io/write_float.def
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@ -483,16 +483,19 @@ output_float (st_parameter_dt *dtp, const fnode *f, char *buffer, size_t size,
/* Scan the digits string and count the number of zeros. If we make it
all the way through the loop, we know the value is zero after the
rounding completed above. */
for (i = 0; i < ndigits; i++)
int hasdot = 0;
for (i = 0; i < ndigits + hasdot; i++)
{
if (digits[i] != '0' && digits[i] != '.')
if (digits[i] == '.')
hasdot = 1;
else if (digits[i] != '0')
break;
}
/* To format properly, we need to know if the rounded result is zero and if
so, we set the zero_flag which may have been already set for
actual zero. */
if (i == ndigits)
if (i == ndigits + hasdot)
{
zero_flag = true;
/* The output is zero, so set the sign according to the sign bit unless