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re PR libfortran/39665 (Fortran IO using unaligned accesses to read/write doubles.)

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2009-04-09  Janne Blomqvist  <jb@gcc.gnu.org>

	PR fortran/39665
	* io/io.h (st_parameter_dt): Add aligned attribute to u.p.value.
	* io/read.c (convert_real): Add note about alignment requirements.

From-SVN: r145852
This commit is contained in:
Janne Blomqvist 2009-04-09 20:44:23 +03:00
parent d5e90cabae
commit 60c063faab
3 changed files with 15 additions and 6 deletions
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6
libgfortran/ChangeLog
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@ -1,3 +1,9 @@
2009-04-09 Janne Blomqvist <jb@gcc.gnu.org>
PR libfortran/39665
* io/io.h (st_parameter_dt): Add aligned attribute to u.p.value.
* io/read.c (convert_real): Add note about alignment requirements.
2009-04-09 Nick Clifton <nickc@redhat.com>
* m4/cshift0.m4: Change copyright header to refer to version 3

9
libgfortran/io/io.h
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@ -498,10 +498,11 @@ typedef struct st_parameter_dt
/* A flag used to identify when a non-standard expanded namelist read
has occurred. */
int expanded_read;
/* Storage area for values except for strings. Must be large
enough to hold a complex value (two reals) of the largest
kind. */
char value[32];
/* Storage area for values except for strings. Must be
large enough to hold a complex value (two reals) of the
largest kind. It must also be sufficiently aligned for
assigning any type we use into it. */
char value[32] __attribute__ ((aligned (__BIGGEST_ALIGNMENT__)));
GFC_IO_INT size_used;
} p;
/* This pad size must be equal to the pad_size declared in

6
libgfortran/io/read.c
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@ -126,8 +126,10 @@ max_value (int length, int signed_flag)
/* convert_real()-- Convert a character representation of a floating
* point number to the machine number. Returns nonzero if there is a
* range problem during conversion. TODO: handle not-a-numbers and
* infinities. */
* range problem during conversion. Note: many architectures
* (e.g. IA-64, HP-PA) require that the storage pointed to by the dest
* argument is properly aligned for the type in question. TODO:
* handle not-a-numbers and infinities. */
int
convert_real (st_parameter_dt *dtp, void *dest, const char *buffer, int length)