diff options
Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 105 |
1 files changed, 54 insertions, 51 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index c14ce5d5248..f3cebcb53f9 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -31,7 +31,6 @@ through the macros defined in the @file{.h} file. * Per-Function Data:: Defining data structures for per-function information. * Storage Layout:: Defining sizes and alignments of data. * Type Layout:: Defining sizes and properties of basic user data types. -* Escape Sequences:: Defining the value of target character escape sequences * Registers:: Naming and describing the hardware registers. * Register Classes:: Defining the classes of hardware registers. * Stack and Calling:: Defining which way the stack grows and by how much. @@ -413,20 +412,10 @@ while the @file{config/rs6000/eabiaix.h} target file defines @end smallexample @end defmac -@defmac LINK_LIBGCC_SPECIAL -Define this macro if the driver program should find the library -@file{libgcc.a} itself and should not pass @option{-L} options to the -linker. If you do not define this macro, the driver program will pass -the argument @option{-lgcc} to tell the linker to do the search and will -pass @option{-L} options to it. -@end defmac - @defmac LINK_LIBGCC_SPECIAL_1 Define this macro if the driver program should find the library @file{libgcc.a}. If you do not define this macro, the driver program will pass the argument @option{-lgcc} to tell the linker to do the search. -This macro is similar to @code{LINK_LIBGCC_SPECIAL}, except that it does -not affect @option{-L} options. @end defmac @defmac LINK_GCC_C_SEQUENCE_SPEC @@ -860,7 +849,7 @@ checking the state of the option (documentation is elided for brevity). @smallexample [chip.c] -char *chip_alu = ""; /* Specify default here. */ +char *chip_alu = ""; /* @r{Specify default here.} */ [chip.h] extern char *chip_alu; @@ -1646,6 +1635,36 @@ the target machine. If you don't define this, the default is two words. @end defmac +@defmac LIBGCC2_LONG_DOUBLE_TYPE_SIZE +Define this macro if @code{LONG_DOUBLE_TYPE_SIZE} is not constant or +if you want routines in @file{libgcc2.a} for a size other than +@code{LONG_DOUBLE_TYPE_SIZE}. If you don't define this, the +default is @code{LONG_DOUBLE_TYPE_SIZE}. +@end defmac + +@defmac LIBGCC2_HAS_DF_MODE +Define this macro if neither @code{LIBGCC2_DOUBLE_TYPE_SIZE} nor +@code{LIBGCC2_LONG_DOUBLE_TYPE_SIZE} is +@code{DFmode} but you want @code{DFmode} routines in @file{libgcc2.a} +anyway. If you don't define this and either @code{LIBGCC2_DOUBLE_TYPE_SIZE} +or @code{LIBGCC2_LONG_DOUBLE_TYPE_SIZE} is 64 then the default is 1, +otherwise it is 0. +@end defmac + +@defmac LIBGCC2_HAS_XF_MODE +Define this macro if @code{LIBGCC2_LONG_DOUBLE_TYPE_SIZE} is not +@code{XFmode} but you want @code{XFmode} routines in @file{libgcc2.a} +anyway. If you don't define this and @code{LIBGCC2_LONG_DOUBLE_TYPE_SIZE} +is 80 then the default is 1, otherwise it is 0. +@end defmac + +@defmac LIBGCC2_HAS_TF_MODE +Define this macro if @code{LIBGCC2_LONG_DOUBLE_TYPE_SIZE} is not +@code{TFmode} but you want @code{TFmode} routines in @file{libgcc2.a} +anyway. If you don't define this and @code{LIBGCC2_LONG_DOUBLE_TYPE_SIZE} +is 128 then the default is 1, otherwise it is 0. +@end defmac + @defmac TARGET_FLT_EVAL_METHOD A C expression for the value for @code{FLT_EVAL_METHOD} in @file{float.h}, assuming, if applicable, that the floating-point control word is in its @@ -1816,42 +1835,6 @@ specified by @code{TARGET_VTABLE_ENTRY_ALIGN}), set this to the number of words in each data entry. @end defmac -@node Escape Sequences -@section Target Character Escape Sequences -@cindex escape sequences - -By default, GCC assumes that the C character escape sequences and other -characters take on their ASCII values for the target. If this is not -correct, you must explicitly define all of the macros below. All of -them must evaluate to constants; they are used in @code{case} -statements. - -@findex TARGET_BELL -@findex TARGET_BS -@findex TARGET_CR -@findex TARGET_DIGIT0 -@findex TARGET_ESC -@findex TARGET_FF -@findex TARGET_NEWLINE -@findex TARGET_TAB -@findex TARGET_VT -@multitable {@code{TARGET_NEWLINE}} {Escape} {ASCII character} -@item Macro @tab Escape @tab ASCII character -@item @code{TARGET_BELL} @tab @kbd{\a} @tab @code{07}, @code{BEL} -@item @code{TARGET_BS} @tab @kbd{\b} @tab @code{08}, @code{BS} -@item @code{TARGET_CR} @tab @kbd{\r} @tab @code{0D}, @code{CR} -@item @code{TARGET_DIGIT0} @tab @kbd{0} @tab @code{30}, @code{ZERO} -@item @code{TARGET_ESC} @tab @kbd{\e}, @kbd{\E} @tab @code{1B}, @code{ESC} -@item @code{TARGET_FF} @tab @kbd{\f} @tab @code{0C}, @code{FF} -@item @code{TARGET_NEWLINE} @tab @kbd{\n} @tab @code{0A}, @code{LF} -@item @code{TARGET_TAB} @tab @kbd{\t} @tab @code{09}, @code{HT} -@item @code{TARGET_VT} @tab @kbd{\v} @tab @code{0B}, @code{VT} -@end multitable - -@noindent -Note that the @kbd{\e} and @kbd{\E} escapes are GNU extensions, not -part of the C standard. - @node Registers @section Register Usage @cindex register usage @@ -2931,6 +2914,18 @@ length of the outgoing arguments. The default is correct for most machines. See @file{function.c} for details. @end defmac +@defmac INITIAL_FRAME_ADDRESS_RTX +A C expression whose value is RTL representing the address of the initial + stack frame. This address is passed to @code{RETURN_ADDR_RTX} and +@code{DYNAMIC_CHAIN_ADDRESS}. +If you don't define this macro, the default is to return +@code{hard_frame_pointer_rtx}. +This default is usually correct unless @code{-fomit-frame-pointer} is in +effect. +Define this macro in order to make @code{__builtin_frame_address (0)} and +@code{__builtin_return_address (0)} work even in absence of a hard frame pointer. +@end defmac + @defmac DYNAMIC_CHAIN_ADDRESS (@var{frameaddr}) A C expression whose value is RTL representing the address in a stack frame where the pointer to the caller's frame is stored. Assume that @@ -4837,7 +4832,7 @@ This macro should evaluate to @code{true} if the integer comparison functions (like @code{__cmpdi2}) return 0 to indicate that the first operand is smaller than the second, 1 to indicate that they are equal, and 2 to indicate that the first operand is greater than the second. -If this macro evalutes to @code{false} the comparison functions return +If this macro evaluates to @code{false} the comparison functions return @minus{}1, 0, and 1 instead of 0, 1, and 2. If the target uses the routines in @file{libgcc.a}, you do not need to define this macro. @end defmac @@ -5537,7 +5532,7 @@ used to set a chunk of memory to a constant value, or whether some other mechanism will be used. Used by @code{__builtin_memset} when storing values other than constant zero and by @code{__builtin_strcpy} when when called with a constant source string. -Defaults to to 1 if @code{move_by_pieces_ninsns} returns less +Defaults to 1 if @code{move_by_pieces_ninsns} returns less than @code{MOVE_RATIO}. @end defmac @@ -9223,7 +9218,7 @@ arguments of @samp{#pragma pack}. @defmac TARGET_DEFAULT_PACK_STRUCT If your target requires a structure packing default other than 0 (meaning -the machine default), define this macro the the necessary value (in bytes). +the machine default), define this macro to the necessary value (in bytes). This must be a value that would also valid to be used with @samp{#pragma pack()} (that is, a small power of two). @end defmac @@ -9592,6 +9587,14 @@ many recent processors which implement a policy of ``relaxed,'' and ia64. The default is @code{false}. @end deftypefn +@c APPLE LOCAL begin mainline 2005-04-14 +@deftypefn {Target Hook} const char *TARGET_INVALID_ARG_FOR_UNPROTOTYPED_FN (tree @var{typelist}, tree @var{funcdecl}, tree @var{val}) +If defined, this macro returns the diagnostic message when it is +illegal to pass argument @var{val} to function @var{funcdecl} +with prototype @var{typelist}. +@end deftypefn +@c APPLE LOCAL end mainline 2005-04-14 + @defmac TARGET_USE_JCR_SECTION This macro determines whether to use the JCR section to register Java classes. By default, TARGET_USE_JCR_SECTION is defined to 1 if both |