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tm.texi (Driver): Fix typos and tweak entry for INCLUDE_DEFAULTS.

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* tm.texi (Driver): Fix typos and tweak entry for
	INCLUDE_DEFAULTS.
	Move misplaced STRUCT_FORCE_BLK entry ...
	(Storage Layout): ... to here.
	(Run-time Target): Recommend having TARGET_MASK_... helper macros.

From-SVN: r32640
This commit is contained in:
Hans-Peter Nilsson 2000-03-19 12:32:32 +00:00 committed by Hans-Peter Nilsson
parent 54b43a686d
commit 9f6dc50085
2 changed files with 30 additions and 17 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
Sun Mar 19 13:27:30 2000 Hans-Peter Nilsson <hp@axis.com>
* tm.texi (Driver): Fix typos and tweak entry for
INCLUDE_DEFAULTS.
Move misplaced STRUCT_FORCE_BLK entry ...
(Storage Layout): ... to here.
(Run-time Target): Recommend having TARGET_MASK_... helper macros.
2000-03-19 Richard Henderson <rth@cygnus.com>
* flow.c (delete_block): Delete the addr_vec along with the block.

39
gcc/tm.texi
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@ -415,26 +415,17 @@ and specify private search areas for GCC. The directory
The definition should be an initializer for an array of structures.
Each array element should have four elements: the directory name (a
string constant), the component name, and flag for C++-only directories,
string constant), the component name (also a string constant), a flag
for C++-only directories,
and a flag showing that the includes in the directory don't need to be
wrapped in @code{extern @samp{C}} when compiling C++. Mark the end of
the array with a null element.
The component name denotes what GNU package the include file is part of,
if any, in all upper-case letters. For example, it might be @samp{GCC}
or @samp{BINUTILS}. If the package is part of the a vendor-supplied
or @samp{BINUTILS}. If the package is part of a vendor-supplied
operating system, code the component name as @samp{0}.
@findex STRUCT_FORCE_BLK
@item STRUCT_FORCE_BLK (@var{field})
Return 1 if a structure containing @var{field} should be accessed using
@code{BLKMODE}.
Normally, this is not needed. See the file @file{c4x.h} for an example
of how to use this macro to prevent a structure having a floating point
field from being accessed in an integer mode.
For example, here is the definition used for VAX/VMS:
@example
@ -554,10 +545,15 @@ by means of a macro @code{TARGET_68020} that tests a bit in
@code{target_flags}.
Define a macro @code{TARGET_@var{featurename}} for each such option.
Its definition should test a bit in @code{target_flags}; for example:
Its definition should test a bit in @code{target_flags}. It is
recommended that a helper macro @code{TARGET_MASK_@var{featurename}}
is defined for each bit-value to test, and used in
@code{TARGET_@var{featurename}} and @code{TARGET_SWITCHES}. For
example:
@smallexample
#define TARGET_68020 (target_flags & 1)
#define TARGET_MASK_68020 1
#define TARGET_68020 (target_flags & TARGET_MASK_68020)
@end smallexample
One place where these macros are used is in the condition-expressions
@ -590,9 +586,9 @@ with opposite meanings, and picks the latter as the default:
@smallexample
#define TARGET_SWITCHES \
@{ @{ "68020", 1, "" @}, \
@{ "68000", -1, "Compile for the 68000" @}, \
@{ "", 1, "" @}@}
@{ @{ "68020", TARGET_MASK_68020, "" @}, \
@{ "68000", -TARGET_MASK_68020, "Compile for the 68000" @}, \
@{ "", TARGET_MASK_68020, "" @}@}
@end smallexample
@findex TARGET_OPTIONS
@ -1004,6 +1000,15 @@ get from @code{PCC_BITFIELD_TYPE_MATTERS}.
Like PCC_BITFIELD_TYPE_MATTERS except that its effect is limited to
aligning a bitfield within the structure.
@findex STRUCT_FORCE_BLK
@item STRUCT_FORCE_BLK (@var{field})
Return 1 if a structure containing @var{field} should be accessed using
@code{BLKMODE}.
Normally, this is not needed. See the file @file{c4x.h} for an example
of how to use this macro to prevent a structure having a floating point
field from being accessed in an integer mode.
@findex ROUND_TYPE_SIZE
@item ROUND_TYPE_SIZE (@var{type}, @var{computed}, @var{specified})
Define this macro as an expression for the overall size of a type