@c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1996, 1998, 1999, 2000,
-@c 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+@c 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
@c This is part of the GCC manual.
@c For copying conditions, see the file gcc.texi.
Permissible values for this parameter are: IRQ, FIQ, SWI, ABORT and UNDEF@.
+On ARMv7-M the interrupt type is ignored, and the attribute means the function
+may be called with a word aligned stack pointer.
+
@item interrupt_handler
@cindex interrupt handler functions on the Blackfin, m68k, H8/300 and SH processors
Use this attribute on the Blackfin, m68k, H8/300, H8/300H, H8S, and SH to
@item naked
@cindex function without a prologue/epilogue code
-Use this attribute on the ARM, AVR, C4x and IP2K ports to indicate that the
-specified function does not need prologue/epilogue sequences generated by
+Use this attribute on the ARM, AVR, C4x, IP2K and SPU ports to indicate that
+the specified function does not need prologue/epilogue sequences generated by
the compiler. It is up to the programmer to provide these sequences.
@item near
disabled with the linker or the loader if desired, to avoid the
problem.)
-@item x87regparm
-@cindex @code{x87regparm} attribute
-On the Intel x86 with 80387 @code{x87regparm} attribute causes the
-compiler to pass up to 3 floating point arguments in 80387 registers
-instead of on the stack. Functions that take a variable number of
-arguments will continue to pass all of their floating point arguments
-on the stack.
-
@item sseregparm
@cindex @code{sseregparm} attribute
On the Intel 386 with SSE support, the @code{sseregparm} attribute
This is useful, for example, when the function is referenced only in
inline assembly.
+@item version_id
+@cindex @code{version_id} attribute on IA64 HP-UX
+This attribute, attached to a global variable or function, renames a
+symbol to contain a version string, thus allowing for function level
+versioning. HP-UX system header files may use version level functioning
+for some system calls.
+
+@smallexample
+extern int foo () __attribute__((version_id ("20040821")));
+@end smallexample
+
+Calls to @var{foo} will be mapped to calls to @var{foo@{20040821@}}.
+
@item visibility ("@var{visibility_type}")
@cindex @code{visibility} attribute
This attribute affects the linkage of the declaration to which it is attached.
For documentation of @code{altivec} attribute please see the
documentation in the @xref{PowerPC Type Attributes}, section.
+@subsection SPU Variable Attributes
+
+The SPU supports the @code{spu_vector} attribute for variables. For
+documentation of this attribute please see the documentation in the
+@xref{SPU Type Attributes}, section.
+
@subsection Xstormy16 Variable Attributes
One attribute is currently defined for xstormy16 configurations:
These attributes mainly are intended to support the @code{__vector},
@code{__pixel}, and @code{__bool} AltiVec keywords.
+@anchor{SPU Type Attributes}
+@subsection SPU Type Attributes
+
+The SPU supports the @code{spu_vector} attribute for types. This attribute
+allows one to declare vector data types supported by the Sony/Toshiba/IBM SPU
+Language Extensions Specification. It is intended to support the
+@code{__vector} keyword.
+
+
@node Inline
@section An Inline Function is As Fast As a Macro
@cindex inline functions
* MIPS Paired-Single Support::
* PowerPC AltiVec Built-in Functions::
* SPARC VIS Built-in Functions::
+* SPU Built-in Functions::
@end menu
@node Alpha Built-in Functions
int64_t __builtin_vis_pdist (v8qi, v8qi, int64_t);
@end smallexample
+@node SPU Built-in Functions
+@subsection SPU Built-in Functions
+
+GCC provides extensions for the SPU processor as described in the
+Sony/Toshiba/IBM SPU Language Extensions Specification, which can be
+found at @uref{http://cell.scei.co.jp/} or
+@uref{http://www.ibm.com/developerworks/power/cell/}. GCC's
+implementation differs in several ways.
+
+@itemize @bullet
+
+@item
+The optional extension of specifying vector constants in parentheses is
+not supported.
+
+@item
+A vector initializer requires no cast if the vector constant is of the
+same type as the variable it is initializing.
+
+@item
+If @code{signed} or @code{unsigned} is omitted, the signedness of the
+vector type is the default signedness of the base type. The default
+varies depending on the operating system, so a portable program should
+always specify the signedness.
+
+@item
+By default, the keyword @code{__vector} is added. The macro
+@code{vector} is defined in @code{<spu_intrinsics.h>} and can be
+undefined.
+
+@item
+GCC allows using a @code{typedef} name as the type specifier for a
+vector type.
+
+@item
+For C, overloaded functions are implemented with macros so the following
+does not work:
+
+@smallexample
+ spu_add ((vector signed int)@{1, 2, 3, 4@}, foo);
+@end smallexample
+
+Since @code{spu_add} is a macro, the vector constant in the example
+is treated as four separate arguments. Wrap the entire argument in
+parentheses for this to work.
+
+@item
+The extended version of @code{__builtin_expect} is not supported.
+
+@end itemize
+
+@emph{Note:} Only the interface described in the aforementioned
+specification is supported. Internally, GCC uses built-in functions to
+implement the required functionality, but these are not supported and
+are subject to change without notice.
+
@node Target Format Checks
@section Format Checks Specific to Particular Target Machines
projects / gcc.git / blobdiff