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

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* 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> Thu Nov 18 11:10:03 1999 Jan Hubicka <hubicka@freesoft.cz>
Richard Henderson <rth@cygnus.com> 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 treated as all containing an implicit PC-relative component, and hence
cannot be used directly as addresses for memory writes. See the comments cannot be used directly as addresses for memory writes. See the comments
in m68k.c for more information. */ in m68k.c for more information. */
#define MASK_PCREL 4096 #define MASK_PCREL 8192
#define TARGET_PCREL (target_flags & MASK_PCREL) #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. /* Macro to define tables used to set the flags.
This is a list in braces of pairs in braces, This is a list in braces of pairs in braces,
each pair being { "NAME", VALUE } each pair being { "NAME", VALUE }
@ -194,6 +198,8 @@ extern int target_flags;
{ "align-int", MASK_ALIGN_INT }, \ { "align-int", MASK_ALIGN_INT }, \
{ "no-align-int", -MASK_ALIGN_INT }, \ { "no-align-int", -MASK_ALIGN_INT }, \
{ "pcrel", MASK_PCREL}, \ { "pcrel", MASK_PCREL}, \
{ "strict-align", -MASK_NO_STRICT_ALIGNMENT}, \
{ "no-strict-align", MASK_NO_STRICT_ALIGNMENT}, \
SUBTARGET_SWITCHES \ SUBTARGET_SWITCHES \
{ "", TARGET_DEFAULT}} { "", TARGET_DEFAULT}}
/* TARGET_DEFAULT is defined in sun*.h and isi.h, etc. */ /* 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 /* Set this nonzero if move instructions will actually fail to work
when given unaligned data. */ when given unaligned data. */
#define STRICT_ALIGNMENT 1 #define STRICT_ALIGNMENT (TARGET_STRICT_ALIGNMENT)
/* Maximum power of 2 that code can be aligned to. */ /* Maximum power of 2 that code can be aligned to. */
#define MAX_CODE_ALIGN 2 /* 4 byte alignment */ #define MAX_CODE_ALIGN 2 /* 4 byte alignment */

8
gcc/invoke.texi
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@ -221,7 +221,7 @@ in the following sections.
-m68000 -m68020 -m68020-40 -m68020-60 -m68030 -m68040 -m68000 -m68020 -m68020-40 -m68020-60 -m68030 -m68040
-m68060 -mcpu32 -m5200 -m68881 -mbitfield -mc68000 -mc68020 -m68060 -mcpu32 -m5200 -m68881 -mbitfield -mc68000 -mc68020
-mfpa -mnobitfield -mrtd -mshort -msoft-float -mpcrel -mfpa -mnobitfield -mrtd -mshort -msoft-float -mpcrel
-malign-int -malign-int -mstrict-align
@emph{VAX Options} @emph{VAX Options}
-mg -mgnu -munix -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 not presently supported with -mpcrel, though this could be supported for
68020 and higher processors. 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 @end table
@node VAX Options @node VAX Options