@end defmac
@defmac UNITS_PER_WORD
-Number of storage units in a word; normally 4.
+Number of storage units in a word; normally the size of a general-purpose
+register, a power of two from 1 or 8.
@end defmac
@defmac MIN_UNITS_PER_WORD
smallest value that @code{UNITS_PER_WORD} can have at run-time.
@end defmac
+@defmac UNITS_PER_SIMD_WORD
+Number of units in the vectors that the vectorizer can produce.
+The default is equal to @code{UNITS_PER_WORD}, because the vectorizer
+can do some transformations even in absence of specialized @acronym{SIMD}
+hardware.
+@end defmac
+
@defmac POINTER_SIZE
Width of a pointer, in bits. You must specify a value no wider than the
width of @code{Pmode}. If it is not equal to the width of @code{Pmode},
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
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
not exist.
@end defmac
+@defmac INIT_ARRAY_SECTION_ASM_OP
+If defined, a C expression whose value is a string, including spacing,
+containing the assembler operation to identify the following data as
+part of the @code{.init_array} (or equivalent) section. If not
+defined, GCC will assume such a section does not exist. Do not define
+both this macro and @code{INIT_SECTION_ASM_OP}.
+@end defmac
+
+@defmac FINI_ARRAY_SECTION_ASM_OP
+If defined, a C expression whose value is a string, including spacing,
+containing the assembler operation to identify the following data as
+part of the @code{.fini_array} (or equivalent) section. If not
+defined, GCC will assume such a section does not exist. Do not define
+both this macro and @code{FINI_SECTION_ASM_OP}.
+@end defmac
+
@defmac CRT_CALL_STATIC_FUNCTION (@var{section_op}, @var{function})
If defined, an ASM statement that switches to a different section
via @var{section_op}, calls @var{function}, and switches back to
method. The default is to return @code{true}.
@end deftypefn
-@deftypefn {Target Hook} bool TARGET_CXX_EXPORT_CLASS_DATA (void)
-If this hook returns false (the default), then virtual tables and RTTI
-data structures will have the ELF visibility of their containing
-class. If this hook returns true, then these data structures will
-have ELF ``default'' visibility, independently of the visibility of
-the containing class.
+@deftypefn {Target Hook} void TARGET_CXX_DETERMINE_CLASS_DATA_VISIBILITY (tree @var{decl})
+@var{decl} is a virtual table, virtual table table, typeinfo object,
+or other similar implicit class data object that will be emitted with
+external linkage in this translation unit. No ELF visibility has been
+explicitly specified. If the target needs to specify a visibility
+other than that of the containing class, use this hook to set
+@code{DECL_VISIBILITY} and @code{DECL_VISIBILITY_SPECIFIED}.
+@end deftypefn
+
+@deftypefn {Target Hook} bool TARGET_CXX_CLASS_DATA_ALWAYS_COMDAT (void)
+This hook returns true (the default) if virtual tables and other
+similar implicit class data objects are always COMDAT if they have
+external linkage. If this hook returns false, then class data for
+classes whose virtual table will be emitted in only one translation
+unit will not be COMDAT.
+@end deftypefn
+
+@deftypefn {Target Hook} bool TARGET_CXX_USE_AEABI_ATEXIT (void)
+This hook returns true if @code{__aeabi_atexit} (as defined by the ARM EABI)
+should be used to register static destructors when @option{-fuse-cxa-atexit}
+is in effect. The default is to return false to use @code{__cxa_atexit}.
@end deftypefn
@node Misc
@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
built-in function.
@end deftypefn
+@deftypefn {Target Hook} tree TARGET_RESOLVE_OVERLOADED_BUILTIN (tree @var{fndecl}, tree @var{arglist})
+
+Select a replacement for a machine specific built-in function that
+was set up by @samp{TARGET_INIT_BUILTINS}. This is done
+@emph{before} regular type checking, and so allows the target to
+implement a crude form of function overloading. @var{fndecl} is the
+declaration of the built-in function. @var{arglist} is the list of
+arguments passed to the built-in function. The result is a
+complete expression that implements the operation, usually
+another @code{CALL_EXPR}.
+@end deftypefn
+
@deftypefn {Target Hook} tree TARGET_FOLD_BUILTIN (tree @var{fndecl}, tree @var{arglist}, bool @var{ignore})
Fold a call to a machine specific built-in function that was set up by
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