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m68kelf.h: Suppress '/* within comment' warning. 

* config/m68k/m68kelf.h: Suppress '/* within comment' warning.

* config/m68k/m68k.h (MASK_PCREL): Don't use same value as
MASK_ALIGN_INT.

* config/m68k/m68k.h (MASK_NO_STRICT_ALIGNMENT): New macro.
(TARGET_STRICT_ALIGNMENT): New macro.
(TARGET_SWITCHES): Add "strict-align" and "no-strict-align".
(STRICT_ALIGNMENT): Depend on TARGET_STRICT_ALIGNMENT.
* invoke.texi (M680x0 Options): Document -mstrict-align.

Co-Authored-By: Geoff Keating <geoffk@cygnus.com>

From-SVN: r30579
This commit is contained in:
Greg McGary 1999-11-19 00:23:01 +00:00 committed by Geoffrey Keating
parent 2450a05729
commit b71733d53f
4 changed files with 30 additions and 4 deletions
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14
gcc/ChangeLog
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@ -1,3 +1,17 @@
Fri Nov 19 11:11:55 1999 Greg McGary <gkm@gnu.org>
Geoffrey Keating <geoffk@cygnus.com>
* config/m68k/m68kelf.h: Suppress '/* within comment' warning.
* config/m68k/m68k.h (MASK_PCREL): Don't use same value as
MASK_ALIGN_INT.
* config/m68k/m68k.h (MASK_NO_STRICT_ALIGNMENT): New macro.
(TARGET_STRICT_ALIGNMENT): New macro.
(TARGET_SWITCHES): Add "strict-align" and "no-strict-align".
(STRICT_ALIGNMENT): Depend on TARGET_STRICT_ALIGNMENT.
* invoke.texi (M680x0 Options): Document -mstrict-align.
Thu Nov 18 11:10:03 1999 Jan Hubicka <hubicka@freesoft.cz>
Richard Henderson <rth@cygnus.com>

10
gcc/config/m68k/m68k.h
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@ -132,9 +132,13 @@ extern int target_flags;
treated as all containing an implicit PC-relative component, and hence
cannot be used directly as addresses for memory writes. See the comments
in m68k.c for more information. */
#define MASK_PCREL 4096
#define MASK_PCREL 8192
#define TARGET_PCREL (target_flags & MASK_PCREL)
/* Relax strict alignment. */
#define MASK_NO_STRICT_ALIGNMENT 16384
#define TARGET_STRICT_ALIGNMENT (~target_flags & MASK_NO_STRICT_ALIGNMENT)
/* Macro to define tables used to set the flags.
This is a list in braces of pairs in braces,
each pair being { "NAME", VALUE }
@ -194,6 +198,8 @@ extern int target_flags;
{ "align-int", MASK_ALIGN_INT }, \
{ "no-align-int", -MASK_ALIGN_INT }, \
{ "pcrel", MASK_PCREL}, \
{ "strict-align", -MASK_NO_STRICT_ALIGNMENT}, \
{ "no-strict-align", MASK_NO_STRICT_ALIGNMENT}, \
SUBTARGET_SWITCHES \
{ "", TARGET_DEFAULT}}
/* TARGET_DEFAULT is defined in sun*.h and isi.h, etc. */
@ -304,7 +310,7 @@ extern int target_flags;
/* Set this nonzero if move instructions will actually fail to work
when given unaligned data. */
#define STRICT_ALIGNMENT 1
#define STRICT_ALIGNMENT (TARGET_STRICT_ALIGNMENT)
/* Maximum power of 2 that code can be aligned to. */
#define MAX_CODE_ALIGN 2 /* 4 byte alignment */

2
gcc/config/m68k/m68kelf.h
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@ -22,7 +22,7 @@ along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* #notinclude "m68k/sgs.h" /* The m68k/SVR4 assembler is SGS based */
/* #notinclude "m68k/sgs.h" / * The m68k/SVR4 assembler is SGS based */
/* These are necessary for -fpic/-fPIC to work correctly. */
#ifndef MOTOROLA

8
gcc/invoke.texi
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@ -221,7 +221,7 @@ in the following sections.
-m68000 -m68020 -m68020-40 -m68020-60 -m68030 -m68040
-m68060 -mcpu32 -m5200 -m68881 -mbitfield -mc68000 -mc68020
-mfpa -mnobitfield -mrtd -mshort -msoft-float -mpcrel
-malign-int
-malign-int -mstrict-align
@emph{VAX Options}
-mg -mgnu -munix
@ -3831,6 +3831,12 @@ allowing at most a 16-bit offset for pc-relative addressing. -fPIC is
not presently supported with -mpcrel, though this could be supported for
68020 and higher processors.
@item -mno-strict-align
@itemx -mstrict-align
@kindex -mstrict-align
Do not (do) assume that unaligned memory references will be handled by
the system.
@end table
@node VAX Options